ELE847 Advanced Electromechanical Systems Course Notes 2008 Edition
|
|
- Ginger Bates
- 5 years ago
- Views:
Transcription
1 Department of Electrical and Computer Engineering ELE847 Advanced Electromechanical Systems Course Notes 2008 Edition
2 ELE847 Advanced Electromechanical Systems Table of Contents 1. Course Outline Lab Manual Problems (with Answers) Lecture Slides 27 Advanced Electromechanical Systems 1
3 1. Course Outline Course Description A course on modeling and simulation of electromechanical systems. The main topics include: modeling of dc motors, dc motor dynamic performance, reference frame theory, modeling of induction and synchronous machines, small signal (linearized) analysis, solid state converters, advanced motor speed control schemes, and simulation techniques. The modeling and simulation techniques developed in this course provide a useful tool for the analysis and design of electric machines, power electronics circuits and dc/ac motor drives. Prerequisite All required third year courses. Course Organization This course consists of three hours of lecture and one hour of laboratory per week. Course Material Text: "Analysis of Electric Machinery and Drive Systems" by P.C. Krause, O.Wasynczuk and S.D.Sudhoff, published by Wiley-IEEE Press, ISBN X Instructor Bin Wu, Ph.D., P.Eng., Professor Room ENG328, 245 Church Street, Toronto Department of Electrical and Computer Engineering Ryerson University (416) ext: 6484 Advanced Electromechanical Systems 2
4 Course Evaluation Theoretical component 70% Mid-term Examination 25% Final Examination 45% Laboratory component 30% 4 Labs including post-lab reports 20% 1 Project including a formal report 10% In order to achieve a passing grade, the student must achieve an average of at least 50% in both theoretical and laboratory components. Course Material 1. Course Outline 2. Lab Manual 3. Problems Download from 4. Lecture Slides 5. Selected Chapters from "Analysis of Electric Machinery and Drive Systems" by P.C. Krause, et al. Purchase at Alicos Copy Centre 66 Gerrard Street, E. Toronto, M5B 1G3 Tel: (416) Copied under license from access Advanced Electromechanical Systems 3
5 Lecture Topics 1 DC Motor Dynamic Performance and Speed Control (10hrs) 1.1 Introduction 1.2 DC Motor Dynamic Models and Transfer functions 1.3 Computer Simulation Techniques 1.4 Dynamic Performance of DC Motors 1.5 Thyristor (SCR) Rectifiers 1.6 DC Motor Speed Control and Simulation 2 Reference Frame Theory (3hrs) 2.1 Introduction 2.2 Equations of Transformation 2.3 Stationary and Arbitrary Reference Frames 2.4 Transformation Between Reference Frames 3 Theory of Induction Machines (8hrs) 3.1 Introduction 3.2 Modeling of Induction Machines 3.3 Commonly Used Reference Frame 3.4 Induction Motor Dynamic Performance 3.5 Steady State Operation 3.6 Induction Motor Small Signal Models 4 Induction Motor Speed Control (12hrs) 4.1 Introduction 4.2 Simulation of Voltage and Current Source Inverters 4.3 Pulse Width Modulation (PWM) Techniques 4.4 Induction Motor Control Schemes 4.5 Field Oriented Control and Simulation 5 Theory of Synchronous Machines (5hrs) 5.1 Introduction 5.2 Modeling of Synchronous Machines 5.3 Synchronous Machine Dynamic Performance 5.4 Steady State Operation 5.5 Small Signal Models 5.6 Speed Control of Synchronous Motors Advanced Electromechanical Systems 4
6 Laboratory Schedule Lab Class Topic Week # 1 DC Motor Dynamic Performance and Solid-state Rectifiers 2 & 3 2 DC Motor Speed Control 4 & 5 3 Induction Motor Dynamic Performance 6 & 7 4 Pulse-width-modulated (PWM) Inverters and Harmonic Analysis 8 & 9 Project Simulation of a High Performance Induction Motor Drive 10, 11 &12 Note - Each lab class is composed of two lab sessions. - Post-lab reports should be handed in one week after the second lab session. - A formal report should be prepared for the project. Advanced Electromechanical Systems 5
7 2. Lab Manual Lab 1 DC Motor Dynamic Performance and Solid State Rectifiers Part A DC Motor Dynamic Performance A1. Objectives - Build a Simulink model for a separately exited DC motor; and - Study dynamic performance of the motor. A2. Pre-lab Exercises 1) Copy file Dcm1.mdl from /home/courses/ele847/ into your current working directory. 2) Open Dcm1.mdl and study all blocks and subsystems contained in this model (refer to your lecture notes for comparison). 3) Start the simulation and study the waveforms of i a, T e and n using scope blocks. 4) Print the model including block diagrams of all subsystems. A3. Lab Procedures A3.1 Model Building Build a dynamic model for a separately excited DC motor. A suggested system block diagram is shown in Fig. 1. Refer to your lecture notes for details. The DC motor has the following nameplate data and parameters: 5hp, 1220rpm, 240V, 16.2A, r a = 0.6Ω, r f = 240 Ω, L AA = 0.012H, L AF = 1.8H, L FF = 120H, J = 1.0kg.m 2. The load torque T L is assumed to be zero. File: Dcm2.mdl Step Armature Voltage [V] Va Ia Load Current [A] Scope ia To Workspace 0 Const Load Torque [N.m] TL Te Wm Motor Torque [N.m] -K- Gain Scope1 n Motor Speed [rpm] Scope2 Te To Workspace1 n To Workspace2 Step1 Field Voltage [V] Vf if Field Current Scope3 DC Motor2 (Masked subsystem) Clock t To Workspace3 Fig. 1 Suggested system block diagram of a separately excited DC motor. Print the model including block diagrams of all subsystems. Advanced Electromechanical Systems 6
8 A3.2 Dynamic Performance During Starting 1) Assuming that a dc supply of 50V is applied to the armature winding at the same time when the field winding is switched to a 240V dc supply, find: - the maximum starting current I a,max, and - the ratio of the maximum starting current to the motor rated current. Is this starting current acceptable in practice? 2) Plot the transient waveforms of armature current i a, electromagnetic torque T e and motor speed n. 3) A dc supply of 240V is applied to the armature and field windings simultaneously. Find the value of an external resistance in the armature circuit such that the maximum starting current is limited to 30A. A3.3 Transients During Sudden Changes in Load Torque The dc motor is running steadily under no load conditions with a 240V dc voltage applied to both armature and field windings (Note: no external resistor is added to the armature circuit). Assume that the load torque is suddenly increased to its rated value. Plot the transient waveforms of armature current i a, electromagnetic torque T e and motor speed n. Find speed regulation under this operating condition ωr( no load ) ωr( rated ) (Speed Regulation = ). ω r( rated ) Part B Solid-state Rectifiers B1. Objectives - Build Simulink models for diode and thyristor rectifiers; and - Investigate rectifier characteristics. B2. Pre-lab Exercises 1) Single phase diode rectifier - Copy file Rectd1.mdl from /home/courses/ele847/ into your working directory. - Open Rectd1.mdl and study all blocks and subsystems contained in this model (refer to your lecture notes for details). - Run the Simulink model and study the waveforms of v a, v d1, v d2, v dc and i dc. 2) Single phase thyristor (SCR) rectifier - Copy file Rectt1.mdl from /home/courses/ele847/ into your working directory. - Open Rectt1.mdl and study all blocks and subsystems contained in this model (refer to your lecture notes for details). - Run the model and study the waveforms of v a, v d1, v d2, v dc and i dc. Advanced Electromechanical Systems 7
9 B3. Lab Procedures B3.1 Three phase diode rectifier 1) Build a Simulink model for a three phase diode rectifier using the circuit diagram discussed in the lecture class. The system block diagram should be similar to that given in Rectd1.mdl. 2) Run the Simulink model and plot the waveforms of v a, v d1, v d2, v dc and i dc assuming that the phase voltage of the three phase ac supply is 110V (60Hz). 3) Calculate the average value of the rectifier output voltage (v dc ) based on the simulated waveforms. B3. 2 Three phase thyristor rectifier 1) Build a Simulink model for a three phase thyristor rectifier using the circuit diagram discussed in the lecture class. The system block diagram should be similar to that given in Rectt1.mdl. It is assumed that the output current of the rectifier is continuous. Hint: Add Variable Transport Delay blocks to the three phase diode model you have built in Part B3.1. 2) Assume that the phase voltage of the ac supply is 110V (60Hz). Run the Simulink model and plot the waveforms of of v a, v d1, v d2, v dc and i dc with the delay angle of 30 and 90 degrees respectively. 3) Derive an expression which can be used to calculate the average value of the rectifier output voltage (v dc ). Verify this expression using simulated waveforms. General Instruction for Post-lab Reports (Lab 1 to 4) The post-lab report (typed) should include the following items: 1) Cover page (including course/lab title, your name, student ID, date) 2) Abstract (a paragraph of about 150 words) 3) Theory (one page, 1.5 line space) 4) Required simulation waveforms 5) Required calculation results and answers to the questions if any 6) Conclusions ( words) 7) Appendix: Simulink models, including block diagrams of all subsystems. Advanced Electromechanical Systems 8
10 Lab 2 DC Motor Speed Control Objectives - To investigate characteristics of various dc motor speed control schemes. - To learn how to tune PI regulator parameters. Part A Open-loop Speed Control A1. System Block Diagram The block diagram of a dc motor speed control system is shown in Fig. 1. The specifications and requirements for masked subsystem blocks in the diagram are as follows: AC Supply: A three-phase balanced power supply with phase voltage of 120V (rms) and frequency of 60Hz. SCR Rectifier: A three-phase full-wave thyristor rectifier with continuous dc current. DC Motor2: A separately excited dc motor. The motor has the following nameplate data and parameters: 5hp, 1220rpm, 240V, 16.2A, r a = 0.6Ω, r f = 240 Ω, L AA = 0.012H, L AF = 1.8H, L FF = 10H, J = 0.1kg.m 2 and B m = 0. Note: The values of motor field self-inductance L FF and moment of inertia J are not the same as those used in Lab 1. Firing Circuit: A cos -1 function should be implemented to make the output voltage (V dc ) of the rectifier proportional to the input voltage (V α ) of the firing circuit. The maximum and minimum input voltages of the firing circuit should be 1.0 and -1.0V respectively. Therefore, a limiter should be used in the firing circuit to limit its input voltage. Dcdrv1.mdl 3 phase Va Vb Vc Vdc Vdc Va Ia Armature Current Ia AC Supply t_d acos fcn included SCR Rectifier Firing Circuit 29.2 Load (N.m) TL Te Wm Electromagnetic Torque (N.m) Speed (rad/s) -Krpm Gain Te n 0.5 V_alpha 240 Vf (V) Vf DC Motor2 if Field Current If Reference (0 ~ 1) Fig.1 A separately excited dc motor with open-loop speed control. Advanced Electromechanical Systems 9
11 A2. Lab Procedures A2.1 Build a dynamic model for the dc motor drive system shown in Fig.1. All the requirements given in Section A1 should be satisfied. A2.2 System Dynamic Performance 1) Assume that the field voltage is 240V, the input voltage to the firing circuit is 0.5V and the load torque is rated. It is also assumed that the voltages and load torque are applied to the drive system simultaneously. Suggested simulation parameters: start time = 0, stop time = 0.4sec and differential equation solver = ode4 (Runge Kutta) with a fixed step size of sec. (Select Parameters from Simulation menu, choose Fixed-step from Solver Options, and then select ode4). 2) Run the model and determine: - the peak value of the starting (armature) current (A), electromagnetic torque (N.m) and rotor speed (rpm); - the maximum speed overshoot (%); and - the value of ripple current I a and ripple torque T e in steady state. Question: How to reduce the ripples? - the average value of the dc voltage V dc. A2.3 Plot the transient waveforms of armature current, electromagnetic torque and rotor speed. Part B DC Motor Drive with Current Feedback B1. System Block Diagram The block diagram of a current controlled dc motor drive system is shown in Fig. 2. The specifications and requirements for masked subsystem blocks in the diagram remain the same as those given in Section A1. The suggested parameters for the current PI regulator are: Time constant: 0.01sec. Gain: 0.02 Upper limiting level: 1.0 Lower limiting level: 0.0 Dcdrv2.mdl Va Vb 3 phase Vc AC Supply t_d acos fcn included SCR Rectifier Firing Circuit Vdc 29.2 Load (N.m) Va TL Ia Te Wm Mux Mux Torque (N.m) -Krpm Gain Ia Te n PI V_alpha Current PI (with limiters) 240 Vf (V) Vf DC Motor2 if Field Current If Sum Current Ref (A) Fig.2 DC motor speed control with current feedback. Advanced Electromechanical Systems 10
12 B2. Lab Procedures B2.1 Build a dynamic model for the dc motor drive system shown in Fig.2. All the requirements given in Section B1 should be satisfied. B2.2 System Dynamic Performance 1) Assume that the field voltage is 240V, load torque is rated and current reference is 32.4A (twice the rated current). It is also assumed that the field voltage, the load torque and the current reference are applied to the drive system simultaneously. Suggested simulation parameters: start time = 0, stop time = 1sec and solver type = ode4 (Runge Kutta) with a fixed step size of sec. 2) Run the model and plot the waveforms of starting current, electromagnetic torque and rotor speed; 3) Based on the simulation results, answer the following questions: - During the motor starting, the rotor speed increases linearly with time. Why? Use equations to assist explanation if necessary. - The armature current and motor torque do not have similar waveforms at the very beginning of the starting process. Why? - The armature current is kept constant during starting. Why? Is this a desirable feature? - If the moment of inertia is doubled, is the starting time doubled too? Please verify. Part C DC Motor Drive with Current and Speed Feedbacks C1. System Block Diagram The block diagram of a dc motor drive system is shown in Fig. 3. The specifications and requirements for masked subsystem blocks in the diagram remain the same as those given in Section B1. The parameters for the speed PI regulator are tentatively set at: Time constant: 0.3sec Gain: 1.2 Upper limiting level: 32.4 (A) Lower limiting level: 0.0 C2. Lab Procedures C2.1 Build a dynamic model for the drive system shown in Fig.3. All the requirements given in Section C1 should be satisfied. C2.2 Dynamic Performance 1) Assume that the field voltage is 240V, the load torque is 10N.m and the speed reference is 63.9 rad/s. The field voltage, load torque and speed reference are applied to the drive system simultaneously. Suggested simulation parameters: start time = 0, stop time = 1sec, and solver type = ode4 (Runge Kutta) with a fixed step size of sec. Advanced Electromechanical Systems 11
13 Dcdrv3.mdl Va 3 phase Vb Vc Vdc Va Ia Mux Mux Ia AC Supply t_d acos fcn included SCR Rectifier Firing Circuit 10 Load (N.m) TL Te Wm -K- Gain rpm Te n V_alpha PI Current PI (with limiters) 240 Vf (V) Vf if DC Motor2 (Separately Excited) If Sum1 Ia Ia (Ref) PI Speed PI (with limiters) Note: Blocks with a drop shadow represent masked subsystems. Sum2 Wm (rad/s) 63.9 Speed Ref (rad/s) Fig.3 DC motor speed control with current and speed feedbacks. 2) Run the model and plot the waveforms of armature current and rotor speed; 3) Based on simulation results, calculate the speed overshoot (%). 4) Determine the speed PI regulator parameters such that the speed overshoot is approximately 5% and the speed settling time as short as possible. C2.3 Print the Simulink model including all subsystems. Post-lab Report Refer to Lab 1 for general instruction on post-lab report. Advanced Electromechanical Systems 12
14 Lab 3 Three-phase Induction Motor Dynamic Performance Objectives - To build a Simulink model for three phase induction motors; and - To investigate induction motor dynamic performance. Part A Induction Motor Dynamic Model The block diagram of a three-phase induction motor supplied by a three-phase power supply is shown in Fig. 1. The specifications and requirements for masked subsystem blocks in the diagram are as follows: AC Supply A three-phase power supply with phase voltage of 127V (rms) and frequency of 60Hz. File: Lab3.mdl Mux Ia Mux Vqs & Vds To Workspace 3 phase Va Vb Vc 3-phase To 2-phase Vqs Vds iqs ids 2-phase To 3-phase Ia Te To Workspace1 AC Supply 3-2 Transform 0 Tl Te 2-3 Transform Load Torque Te 0 W Wrm 60/(2*pi) Clock t To Workspace3 Stator Frame IM_dq_Arbi Induction motor model in the arbitrary frame Gain n n To Workspace2 Fig. 1 System block diagram. 3-phase to 2-phase Transformation: Both 3-phase variables and 2-phase variables are in the stationary frame. Use the transformation equations derived in the lecture or Equation on Page 111 of textbook. Note: the angle θ between the stationary and arbitrary frames should be set to zero. Advanced Electromechanical Systems 13
15 IM_dq_Arbi Induction motor d-q model in the arbitrary reference frame. This subsystem must be masked and the motor parameters must be specified in its dialog box. The inputs of the subsystem are d-q axis voltages (v qs, v ds ), load torque (T L ) and the speed of the arbitrary reference frame (ω) while the outputs are d-q axis current (i qs, i ds ), electromagnetic torque (T e ) and the rotor mechanical speed ω rm. Build the induction motor d-q model using the equivalent circuit given in Fig (Page 151). The zero-axis equivalent circuit can be neglected since this is a 3-phase balance system. The torque-speed relationship is described by Eq and the electromagnetic torque generated by the motor can be calculated according to Eq phase to 3-phase Transformation Both 2-phase variables and 3-phase variables are in the stationary frame. Use the transformation equations derived in the lecture or Equation on Page 111. Note: The angle θ between the stationary and arbitrary frames should be zero. Part B Free Acceleration Characteristics The induction motor under investigation is rated at 3hp, 220V, 8.4A and 1710rpm. The parameters of the motor are given in Table (Page 165). B1. Motor free acceleration with rated stator voltage 1) The motor is started under no load conditions with the rated stator voltage. Suggested simulation parameters: start time = 0, stop time = 0.5sec and differential equation solver = ode4 (Runge Kutta) with a fixed step size of sec. (Select Parameters from Simulation menu, choose Fixed-step from Solver Options, and then select ode4). 2) Run the model and determine: - the maximum peak value of the stator current and electromagnetic torque during free acceleration; - the average starting torquet e, start ; and - the motor starting time t st. The definition for T e, start and t st is given in Fig. 2. 3) Plot the waveforms of T e versus n, T e versus t, i a versus t, n versus t. Advanced Electromechanical Systems 14
16 n n ss (0.05)n ss t st (a) Motor speed T e T e1 T e, start t T e2 (b) Electromagnetic torque Fig. 2 Motor speed and torque waveforms during free acceleration. B2. Motor free acceleration with a reduced voltage 1) The motor is started under no load conditions with 50% rated stator voltage. 2) Run the model and determine: - the maximum peak value of the stator current and electromagnetic torque during free acceleration; - the average starting torque; and - the motor starting time. 3) Plot the waveforms of T e versus t, i a versus t, n versus t. 4) Compare the simulation results obtained from B1 and B2, and make your conclusions. Post-lab Report Refer to Lab 1 for general instruction on post-lab report. Advanced Electromechanical Systems 15
17 Lab 4 Three-phase Voltage Source Inverter and PWM Techniques Objectives - To build Simulink models for three phase voltage source inverters; and - To investigate PWM inverter performance. Part A Three Phase Voltage Source Inverter A1. Model Building The block diagram of a three phase voltage source inverter with a three phase RL load is shown in Fig. 1. The specifications for masked subsystem blocks in the diagram are as follows. Square Wave Generator This block generates three square wave signals for the inverter. These signals should have the same amplitude (1.0V) with a duty cycle of 50%. The phase shift between any two signals is 120 degrees. This is a masked subsystem. The frequency of the square waves should be passed to the subsystem through its dialog box. Lab4a.mdl Van G1 Van Ia Gating Square Wave Gating Generator G3 G5 VSI Vbn Vcn RL Load Ib Ic Mux Mux1 Load Current 250 Three Phase VSI RL Load Vdc Fig. 1 System block diagram. Three Phase Voltage Source Inverter Use the algorithm discussed in the lecture class to build the model for this inverter. Advanced Electromechanical Systems 16
18 RL Load This is a three phase balanced RL load. The parameters of the load resistance and inductance should be passed to the subsystem through its dialog box. A2. Lab Procedure A2.1 Run the model and plot the waveforms of G 1, v an and i a under the following operating conditions: V dc = 250V, R load = 2Ω, L load = 0.01H and the output frequency of the inverter is 60Hz. A note on simulation parameters. You can either use fixed-step or variable-step differential equation solver. If you use a fixed-step differential equation solver with a large time step, you may not be able to obtain accurate results or the results may even be wrong. This is mainly due to the switching operation of the inverter and small time constants that the drive system may contain. If you choose Runge Kutta (ode4) method, you may try to use a step size of 10 µ s or smaller. A2.2 Plot the harmonic spectrum of the waveforms of v an and i a. Frequency range for the plot: 0 to 2kHz. Note: This is a common task for electrical engineers working in the area of power electronics and motor drives. Part B PWM Controlled Inverter B1. Model Building The system block diagram is shown in Fig. 2. The specifications and requirements for masked subsystem blocks in the diagram are as follows: Three Phase Sine Wave Generator This block generates a three phase balanced sine wave whose frequency and amplitude are controlled by the block input variables Freq and M d, where Freq is the reference frequency and M d is the modulation index. The maximum value of the sine wave amplitude is 1V. Advanced Electromechanical Systems 17
19 Lab4b.mdl 20 Van Freq Sine Wave Sine G1 G1 Van Ia 0.8 Md 3-phase SW Generator Carrier G3 G5 G3 G5 VSI Vbn RL Load Ib Mux Load Current Carrier Wave PWM Generator Vcn Ic Mux 1-phase CW Generator Three Phase VSI RL Load 250 Vdc Fig. 2 PWM Controlled Voltage Source Inverter Single Phase Carrier Wave Generator This is a masked subsystem where the frequency of the carrier (a triangular wave) is passed to the block through its dialog box. The carrier is not synchronized with the sine waves. Other Blocks The specifications for the other blocks are given in Part A. B2. Lab Procedure B2.1 Run the model and plot the waveforms of v an and i a under the following operating conditions: Assume that V dc = 250V, R load = 2Ω and L load = 0.01H. 1) Freq = 20Hz, M d = 0.8, and the frequency of the carrier wave is 240Hz; 2) Freq = 20Hz, M d = 0.8, and the frequency of the carrier wave is 1080Hz; 3) Freq = 20Hz, M d = 0.4, and the frequency of the carrier wave is 1080Hz; and 4) Freq = 60Hz, M d = 0.4, and the frequency of the carrier wave is 1080Hz. Compare the simulation results and make your conclusions. B2.2 Plot the harmonic spectrum of the waveforms of v an and i a in Part B2-4). Frequency range for the plot: dc to 2kHz. Compare the harmonic spectrum with that in Part A2.2, and then make conclusions. Post-lab Report Refer to Lab 1 for general instruction on post-lab report. Advanced Electromechanical Systems 18
20 Project Simulation of Induction Motor Drives Objectives To investigate characteristics of two induction motor speed control systems. Part A Induction Motor Speed Control Using a Six-step Voltage Source Inverter A.1 Model Building Build the Simulink model according to the block diagram shown in Fig. 1. You may use some of the models you built in the previous lab sessions. The parameters of the induction motor speed control system are as follows. Induction motor Nameplate data: 3φ, 3hp, 220V, 8.4A (rated) and 1710rpm. Use the motor parameters given in Table , P165, textbook. DC link resistor This resistor represents the power loss of the SCR rectifier and dc link bus. The equivalent resistance is 0.5Ω. Low pass filter This is a second order lower pass filter with dc gain k = 1 and quality factor Q = 1. The corner frequency of the filter should be the same as the reference frequency of the drive. The LP filter is used to extract the fundamental component from the six-step inverter output voltage V an. Power Supply 60Hz, 127V per phase. Load torque 12.5N.m (rated torque) Other constants K v = 0.95/60 and V comp = 0. Proja.mdl Mux Vdc Vdc Van Vqs iqs 3 phase Va Vb DC Link G1 3-phase To 2-phase Vds ids 2-phase To 3-phase Ia AC Supply Vc Vdo Filter G3 VSI Vbn 12.5 Tl Te 2-3 Transform V_alpha Sum t_d acos fcn included SCR Rectifier Firing Circuit Subsystem G5 3-phase Square Wave Generator Three Phase VSI Vcn Load Torque [N.m] 0 Stator Frame W IM_dq_Arbi Wrm Induction motor model in the arbitrary frame 60/(2*pi) Gain Te n Kv -K Vcomp LP Filter (2nd Order) Van1 60 Ref [Hz] Fig. 1 An Induction Motor Speed Control System Using a Six-step Inverter. Advanced Electromechanical Systems 19
21 A.2 Simulation tasks 1) Run the Simulink model and determine the value of the dc link capacitor such that the dc link voltage ripple is limited to 10% when the inverter operates at 20Hz with a rated V/f and the motor operates with rated torque. Plot the steady state waveforms of v do and v dc (e.g., 2 cycles of the supply frequency). 2) Start the drive system until a steady state operation is reached. Complete the following table. Inverter Output Frequency [Hz] Vˆ an (Fundamental, peak, steady state) V an (Fundamental, rms) V / f Ratio (Volts,rms/Hz) Steady State Speed n (rpm) Synchronous Speed n s (rpm) Slip Speed (n s - n) 3) To compensate the voltage drop on stator winding resistance at low frequencies, let K v = 0.9/60 and V comp = Run the drive system and complete the following table. Inverter Output Frequency [Hz] Vˆ an (Fundamental, peak, steady state) V an (Fundamental, rms) V / f Ratio (Volts,rms/Hz) Steady State Speed n (rpm) Synchronous Speed n s (rpm) Slip Speed (n s - n) 4) Start the drive system at 60Hz under the operating conditions given in 2) until a steady state operation is reached. Plot the transient waveforms of motor speed n, stator current I a, motor torque T e, diode rectifier output voltage V do and inverter input voltage V dc. Part B Induction Motor Speed Control using a PWM Inverter B.1 Model Building Build the Simulink model shown in Figure 2. The system parameters remain the same as those given in Part A. B.2 Simulation tasks Repeat the simulation tasks specified in A.2-2. Advanced Electromechanical Systems 20
22 Fig2. An Induction Motor Drive Using a PWM Inverter. Report The formal report should include the following items: 1) Cover page (including project title, your name, student ID, date) 2) Abstract (a paragraph of about 200 words) 3) Theory (two full pages, 1.5 line space) 4) All required waveforms, tables and calculations 5) Comment on the size of the dc link capacitors used in both systems 6) Compare the simulation results obtained in Part A.2-2 and A.2-3 by answering the following questions: - Is the V/f ratio constant? You may draw V versus f curves for comparison. - Is the slip speed constant? Why? 7) Compare the simulation results obtained in Part A.2-2 and B.2 8) Comments on harmonic issues of the two systems 9) Conclusions ( words) 10) Appendix: Simulink model in Part B including block diagrams of all subsystems. Advanced Electromechanical Systems 21
23 3. Problems Topic 1 DC Motor Dynamic Performance and Speed Control 1.1 Consider the dynamic equivalent circuit of a shunt dc motor given in Fig (page 79, textbook). Drive a block diagram for this motor. It is assumed that the armature voltage and load torque are input variables while the armature current, rotor speed and electromagnetic torque are output variables. Show these variables on the diagram. 1.2 Repeat Problem 1.1 for a series dc motor using the equivalent circuit given in Fig (page 83, textbook). Answer: Discussed in the lecture class. 1.3 Formulate the following transfer functions for a shunt dc motor under the assumption that the field current I f is constant: I a (s) (a) assuming that armature voltage is zero. This transfer function can be used to study T L (s) the dynamic response of armature current due to changes in load torque. K v I a(s) J τ a a Answer: = r T L(s) 2 1 S + ( 1/ τ a + Bm /J ) S + ( Bm /J +1/ τ m) τ a J where ra τ m = 2 K v I a (s) (b) assuming that the load torque is zero. This transfer function can be used to study the dynamic V a (s) response of armature current due to changes in armature voltage. J S + Bm I a(s) a J τ a Answer: = r V a(s) 2 1 S + ( 1 / τ a + Bm /J ) S + ( Bm /J +1/ τ m) τ a T e (s) (c) assuming that the load torque is zero. V (s) a Answer: T e(s) = V a(s) S 2 + ( 1 / + /J ) S + ( /J +1/ ) τ a K v B m J S + Bm ra J τ a Derive an expression for motor speed ω r (s) in terms of armature voltage V a (s) and load torque T L (s) for a separately excited motor with a constant field current. Refer to Page 97 of textbook for answers. 1.5 Sketch to scale the dc side waveforms ( v d1, v d 2 and vdc = vd1 vd 2 ) of a single phase full-wave thyristor rectifier with a delay angle of 30 and 90 degrees respectively. 1.6 Repeat Problem 1.5 for a three phase full-wave thyristor rectifier. 1.7 Using standard Simulink blocks, derive a Simulink model for a single phase full-wave thyristor rectifier. τ a B m τ m Advanced Electromechanical Systems 22
24 1.8 Repeat Problem 1.7 for a three phase full-wave thyristor rectifier. 1.9 Derive an expression which can be used to calculate the average dc output voltage of a three phase fullwave thyristor rectifier. Topic 2 Reference Frame Theory 2.1 Consider three-phase currents i as = cos t, i bs = t/2 and i cs = -sin t in the stationary reference frame. Find the values of iqs and ids in the arbitrary reference frame when the angle θ between the two reference frames is π/4 at t = π/3 sec (refer to Pages , textbook). 2.2 Assume that i β and i α are variables in the stationary reference frame and i q and i d are variables in the arbitrary frame which rotates in space at an arbitrary speed of ω as shown in Fig. 2.1 below. Verify the following equations which can be used to transform the variables in the stationary frame to the arbitrary frame. i q = i β cosθ i α sinθ ; and i d = i β sinθ + i α cosθ (Two-phase to two-phase transformation). ω q-axis θ β axis (Stationary Frame) α axis (Stationary Frame) ω d-axis Fig. 2.1 Transformation between two reference frames 2.3 Derive equations which can be used to transform two-phase variables (i q and i d ) in the arbitrary reference frame to two-phase variables (i β and i α ) in the stationary frame. 2.4 Derive a coefficient matrix which can be used to transform abc variables in the stationary reference frame to qdo variables also in the stationary reference frame, assuming that the q-axis is coincident with the a-axis. 2.5 Derive an equation which can be used to transform abc variables in the stationary reference frame to qdo variables in the arbitrary reference frame which rotates in space at a speed of ω. 2.6 Derive an equation which can be used to transform qdo variables in the arbitrary reference frame to abc variables in the stationary reference frame. 2.7 Derive arbitrary-frame (q-d) equivalent circuits for a three-phase balanced capacitor bank. (Hint: Refer to Pages , textbook). 2.8 Derive arbitrary-frame (q-d) equivalent circuits for a three-phase RL circuit. It is assumed that 1) the RL circuit is three-phase balanced; 2) the resistors and inductors are connected in series; and 3) no mutual inductances exist between any two phases. (Hint: Refer to Pages , textbook). Advanced Electromechanical Systems 23
25 Topic 3 Theory of Induction Machines 3.1 A simplified version of induction motor dq model in the arbitrary reference frame is shown in Fig. 3.1, where L L is the total leakage inductance of the stator and rotor windings. It is also called the Γ equivalent circuit of the induction motor. a) Express dq-axis flux linkages in terms of motor inductances and currents in a matrix form. b) Express dq-axis currents in terms of motor inductances and flux linkages. Based on the derived equations, draw a block diagram using standard Simulink blocks. r s ωλ ds L L (ω-ω r )λ dr r r v qs pλ qs L m pλ qr v qr q-axis r s ωλ qs L L (ω-ω r )λ qr r r v ds pλ ds L m pλ dr v dr d-axis Fig. 3.1 Induction motor dq model in the arbitrary reference frame, where the stator and rotor winding leakage inductances are lumped together (the Γ equivalent circuit). 3.2 Derive equations for the calculation of the dq voltages specified in Fig Assume that this is a wound rotor induction motor where the rotor winding is open. Following the same procedure discussed in the lecture class, derive a Simulink model for the induction motor. r s ω s λ ds L ls L lr ( ω s -ω r )λ dr r r v qs pλ qs L m pλ qr q-axis r s ω s λ qs L ls L lr ( ω s -ω r )λ qr r r v ds pλ ds L m pλ dr d-axis Fig. 3.2 Induction motor dq model in the synchronous reference frame. 3.3 The induction dq model in the synchronous frame is shown in Fig. 3.2, where ω s is the speed of the synchronously rotating frame. Assuming that the rotor winding is shorted, repeat the questions given in 3.1 and 3.2. Advanced Electromechanical Systems 24
26 3.4 A three phase induction motor is powered by a three phase balanced power supply. The power supply and the induction motor can be represented by masked subsystems. Assume the induction motor model is in the synchronous reference frame. The output variables of the power supply - induction motor system are stator currents, electromagnetic toque and motor speed in the stator (stationary) reference frame. Draw a system block diagram showing all the subsystem blocks including 3-phase to 2-phase transformation, stationary to rotating transformation and other transformations if required. It is not necessary to show the details of the subsystems. 3.5 Repeat Problem 3.4 except the induction motor model is in the rotor reference frame. Topic 4 Induction Motor Speed Control 4.1 A three-phase induction motor has the following nameplate data: 10hp, 60Hz, 220V and 1150rpm. The maximum torque (T max ) of the motor is 155N.m, which occurs at the motor speed of 970rpm. The starting torque of the motor is 70N.m. Assuming that the air gap flux of the motor is kept the constant, sketch to scale the toque versus speed curves at the stator frequency of 60Hz, 40Hz and 20Hz. 4.2 Assuming that the input dc voltage of a three-phase IGBT-based voltage source inverter is 200V and the duty cycle of the IGBTs is 50% (i.e., the IGBT conduction angle is 180 degrees). a) Determine the amplitude of the fundamental component, 5 th, 7 th and 11 th harmonics of the inverter output voltage (line-to-line). b) Sketch to scale the line-to-neutral voltage waveform (Phase a) and determine the amplitude of the fundamental component, 5 th, 7 th and 11 th harmonics. 4.3 Draw the inverter output voltage waveform (line-to-line) assuming that the IGBT devices in Question 4.2 have a conduction angle of 120 degrees per cycle. Assume that the inverter is loaded with a three-phase balanced resistor. Hint: the IGBT gating signals for the upper and lower IGBTs in the same inverter leg are no longer complementary Derive a Simulink model for a three phase voltage source inverter, assuming the conduction angle of the switching devices is 180 degrees. 4.5 Draw a block diagram (not Simulink Model) for a three-phase induction motor drive using Volts per Hertz control scheme. To ensure a constant flux operation, voltage feedback should be used. The voltage drop on the stator winding resistance at low operating frequencies should also be compensated. The drive system is implemented with a sine pulse width modulator. 4.6 Fig. 4.1 shows the block diagram of an induction motor field oriented control scheme. Derive equations and then Simulink block diagrams for the following subsystems: I s * & θ T * Resolver, Current Reference Generator and Flux & Torque Estimator. Advanced Electromechanical Systems 25
27 V dc ω m PI λ r T e * PI PI i T * i f * Resolver θ T i * s θ s Current Reference Generator i * as Delta Modulator G1 G3 G5 VSI θ f i as T e λ r Flux & Torque Estimator i bs i cs v as v bs Tachometer IM Fig. 4.1 Block diagram of an induction motor field oriented control. Topic 5 Theory of Synchronous Machines 5.1 Use the synchronous machine model discussed in the lecture class or given in Figure (Page 202, textbook). Note: Superscripts associated with machine variables may be ignored. (a) Express flux linkages (λ qs, λ ds, λ kq1, λ kq2, λ kd, and λ fd ) in terms of machine currents (λ qs, λ ds, λ kq1, λ kq2, λ kd, and λ fd ). (b) Derive expressions for the following voltages: V qs, V ds, V kq1, V kq2, V kd, and V fd. 5.2 For small size synchronous machines, the damper windings may be omitted to reduce manufacturing cost. Assuming that for a synchronous machine, the kq2 and kd windings are not equipped, repeat questions given in State the reasons why the rotor reference frame is often used for synchronous machine analysis. 5.4 Briefly explain the main functions of damper windings. What are the main differences between the synchronous machine and induction machine. Advanced Electromechanical Systems 26
28 4. Lecture Slides Topic 1 Fig. 1-1 Waveforms of a single-phase SCR rectifier. Advanced Electromechanical Systems 27
29 Lecture Slides Topic 1 v d1 v a i a D1 D3 D5 v b i b v dc R L v c i c D4 D6 D2 v d 2 Fig. 1-2 Waveforms of a three-phase diode rectifier. Advanced Electromechanical Systems 28
30 Lecture Slides Topic 1 Fig. 1-3 Simplified Simulink model of three-phase diode rectifier. Advanced Electromechanical Systems 29
31 Lecture Slides Topic 1 Fig. 1-4 Typical waveforms of a three-phase SCR rectifier. Advanced Electromechanical Systems 30
32 Lecture Slides Topic 1 Fig. 1-5 Simulated waveforms of a three-phase SCR rectifier. Advanced Electromechanical Systems 31
33 Lecture Slides Topic 1 Fig. 1-6 Simulated waveforms of a DC drive with open loop control. Advanced Electromechanical Systems 32
34 Lecture Slides Topic 1 Fig. 1-7 Simulated waveforms of a DC drive with closed loop control. Advanced Electromechanical Systems 33
35 Lecture Slides Topic 3 (Free acceleration) Fig. 3-1 Simulated waveforms of a three-phase induction motor in the STATOR (STATIONARY) reference frame. Advanced Electromechanical Systems 34
36 Lecture Slides Topic 3 (Free acceleration) Fig. 3-2 Simulated waveforms of a three-phase induction motor in the STATOR (STATIONARY) reference frame. Advanced Electromechanical Systems 35
37 Lecture Slides Topic 3 (Free acceleration) Fig. 3-3 Simulated rotor speed waveform of a three-phase induction motor. Advanced Electromechanical Systems 36
38 Lecture Slides Topic 3 (Free acceleration) Fig. 3-4 Simulated waveforms of a three-phase induction motor in the SYNCHRONOUS reference frame. Advanced Electromechanical Systems 37
39 Lecture Slides Topic 3 (pu) i as (rpm) n r t (sec) (a) Simulated waveforms Stator current i as : 2.56 pu/div; Rotor speed n r : 720rpm/div Time base: 0.1sec/div (b) Measured waveforms Fig. 3-5 Simulated and measured waveforms of a three-phase induction motor during free acceleration. Advanced Electromechanical Systems 38
40 Lecture Slides Topic 4 T1 D T3 1 D3 G G1 3 G 5 T 5 D 5 V dc T 4 a D 4 v a T 6 b D 6 T 2 c D 2 i a i b i c n G 4 G 6 G 2 GND G 1 G 2 G 3 ωt ωt G 4 G 5 G 6 π / 3 π / 3 π 2π 3π ωt v a V dc ωt v b v c V dc ωt V dc ωt v ab V dc ωt v bc V dc ωt v ca I II III IV V VI V dc ωt Fig. 4-1 Three phase voltage source inverter with square wave operation. Advanced Electromechanical Systems 39
41 Lecture Slides Topic 4 T1 D T3 1 D3 G G1 3 G 5 T 5 D 5 V dc T 4 a D 4 v a T 6 b D 6 T 2 c D 2 i a i b i c n G 4 G 6 G 2 GND v v cr vma vm b vmc Vˆcr Vˆm ωt v a ( G 1 ) V dc ωt v b ( G ) 3 V dc ωt v ab v ab1 v ab = v a v b π V dc ωt 2π Fig. 4-2 Principle of sinusoidal pulse width modulation (SPWM). Advanced Electromechanical Systems 40
42 adlecture Slides Topic 4 (rpm) ω r * r ω r T (N m) e ( A) i as λ (Wb), r rθ )f ω(λ r θ f Fig. 4-3 Simulated waveforms of field oriented control for induction motor drives. Advanced Electromechanical Systems 41
43 Lecture Slides Topic 5 Fig. 5-1 Synchronous generator with a salient-pole rotor. Advanced Electromechanical Systems 42
44 Lecture Slides Topic 5 r kq1 i kq1 V kq1 L lkq1 i qs r s ω r λ ds L ls pλ kq1 i mq L lkq2 v qs pλ qs L mq r kq2 i kq2 q-axis pλ kq2 V kq2 r kd i kd V kd L lkd i ds r s ω r λ qs L ls pλ kd i md L lfd v ds pλ ds L md r fd i fd d-axis pλ fd V fd Fig. 5-2 dq-axis model of synchronous generator in the rotor reference frame. Advanced Electromechanical Systems 43
CHAPTER 2 CURRENT SOURCE INVERTER FOR IM CONTROL
9 CHAPTER 2 CURRENT SOURCE INVERTER FOR IM CONTROL 2.1 INTRODUCTION AC drives are mainly classified into direct and indirect converter drives. In direct converters (cycloconverters), the AC power is fed
More informationModule 7. Electrical Machine Drives. Version 2 EE IIT, Kharagpur 1
Module 7 Electrical Machine Drives Version 2 EE IIT, Kharagpur 1 Lesson 34 Electrical Actuators: Induction Motor Drives Version 2 EE IIT, Kharagpur 2 Instructional Objectives After learning the lesson
More informationGeneralized Theory Of Electrical Machines
Essentials of Rotating Electrical Machines Generalized Theory Of Electrical Machines All electrical machines are variations on a common set of fundamental principles, which apply alike to dc and ac types,
More informationConventional Paper-II-2013
1. All parts carry equal marks Conventional Paper-II-013 (a) (d) A 0V DC shunt motor takes 0A at full load running at 500 rpm. The armature resistance is 0.4Ω and shunt field resistance of 176Ω. The machine
More informationCHAPTER-III MODELING AND IMPLEMENTATION OF PMBLDC MOTOR DRIVE
CHAPTER-III MODELING AND IMPLEMENTATION OF PMBLDC MOTOR DRIVE 3.1 GENERAL The PMBLDC motors used in low power applications (up to 5kW) are fed from a single-phase AC source through a diode bridge rectifier
More informationSimulation and Dynamic Response of Closed Loop Speed Control of PMSM Drive Using Fuzzy Controller
Simulation and Dynamic Response of Closed Loop Speed Control of PMSM Drive Using Fuzzy Controller Anguru Sraveen Babu M.Tech Student Scholar Dept of Electrical & Electronics Engineering, Baba Institute
More informationMODELING AND SIMULATION OF DISCONTINUOUS CURRENT MODE INVERTER FED PERMANENT MAGNET SYNCHRONOUS MOTOR DRIVE
Journal of Theoretical and Applied Information Technology 2005-2011 JATIT & LLS. All rights reserved. www.jatit.org MODELING AND SIMULATION OF DISCONTINUOUS CURRENT MODE INVERTER FED PERMANENT MAGNET SYNCHRONOUS
More informationEE 410/510: Electromechanical Systems Chapter 5
EE 410/510: Electromechanical Systems Chapter 5 Chapter 5. Induction Machines Fundamental Analysis ayssand dcontrol o of Induction Motors Two phase induction motors Lagrange Eqns. (optional) Torque speed
More informationExperiment 3. Performance of an induction motor drive under V/f and rotor flux oriented controllers.
University of New South Wales School of Electrical Engineering & Telecommunications ELEC4613 - ELECTRIC DRIVE SYSTEMS Experiment 3. Performance of an induction motor drive under V/f and rotor flux oriented
More informationMATLAB/SIMULINK MODEL OF FIELD ORIENTED CONTROL OF PMSM DRIVE USING SPACE VECTORS
MATLAB/SIMULINK MODEL OF FIELD ORIENTED CONTROL OF PMSM DRIVE USING SPACE VECTORS Remitha K Madhu 1 and Anna Mathew 2 1 Department of EE Engineering, Rajagiri Institute of Science and Technology, Kochi,
More informationSimulation and Dynamic Response of Closed Loop Speed Control of PMSM Drive Using Fuzzy Controller
Simulation and Dynamic Response of Closed Loop Speed Control of PMSM Drive Using Fuzzy Controller Anguru Sraveen Babu M.Tech Student Scholar Department of Electrical & Electronics Engineering, Baba Institute
More informationEE595S: Class Lecture Notes Chapter 13: Fully Controlled 3-Phase Bridge Converters. S.D. Sudhoff. Fall 2005
EE595S: Class Lecture Notes Chapter 3: Fully Controlled 3-Phase Bridge Converters S.D. Sudhoff Fall 2005 3.2 Fully Controlled 3-Phase Bridge Converter Fall 2005 EE595S Electric Drive Systems 2 One Phase
More informationEE 560 Electric Machines and Drives. Autumn 2014 Final Project. Contents
EE 560 Electric Machines and Drives. Autumn 2014 Final Project Page 1 of 53 Prof. N. Nagel December 8, 2014 Brian Howard Contents Introduction 2 Induction Motor Simulation 3 Current Regulated Induction
More informationANALYSIS OF V/f CONTROL OF INDUCTION MOTOR USING CONVENTIONAL CONTROLLERS AND FUZZY LOGIC CONTROLLER
ANALYSIS OF V/f CONTROL OF INDUCTION MOTOR USING CONVENTIONAL CONTROLLERS AND FUZZY LOGIC CONTROLLER Archana G C 1 and Reema N 2 1 PG Student [Electrical Machines], Department of EEE, Sree Buddha College
More informationA Robust Fuzzy Speed Control Applied to a Three-Phase Inverter Feeding a Three-Phase Induction Motor.
A Robust Fuzzy Speed Control Applied to a Three-Phase Inverter Feeding a Three-Phase Induction Motor. A.T. Leão (MSc) E.P. Teixeira (Dr) J.R. Camacho (PhD) H.R de Azevedo (Dr) Universidade Federal de Uberlândia
More informationModeling and Simulation of Induction Motor Drive with Space Vector Control
Australian Journal of Basic and Applied Sciences, 5(9): 2210-2216, 2011 ISSN 1991-8178 Modeling and Simulation of Induction Motor Drive with Space Vector Control M. SajediHir, Y. Hoseynpoor, P. MosadeghArdabili,
More informationPAPER-II (Subjective)
PAPER-II (Subjective) 1.(A) Choose and write the correct answer from among the four options given in each case for (a) to (j) below: (a) Improved commutation in d.c machines cannot be achieved by (i) Use
More informationModeling & Simulation of PMSM Drives with Fuzzy Logic Controller
Vol. 3, Issue. 4, Jul - Aug. 2013 pp-2492-2497 ISSN: 2249-6645 Modeling & Simulation of PMSM Drives with Fuzzy Logic Controller Praveen Kumar 1, Anurag Singh Tomer 2 1 (ME Scholar, Department of Electrical
More informationA Switched Boost Inverter Fed Three Phase Induction Motor Drive
A Switched Boost Inverter Fed Three Phase Induction Motor Drive 1 Riya Elizabeth Jose, 2 Maheswaran K. 1 P.G. student, 2 Assistant Professor 1 Department of Electrical and Electronics engineering, 1 Nehru
More informationModelling and Simulation of a DC Motor Drive
Modelling and Simulation of a DC Motor Drive 1 Introduction A simulation model of the DC motor drive will be built using the Matlab/Simulink environment. This assignment aims to familiarise you with basic
More informationSimulation And Comparison Of Space Vector Pulse Width Modulation For Three Phase Voltage Source Inverter
Simulation And Comparison Of Space Vector Pulse Width Modulation For Three Phase Voltage Source Inverter Associate Prof. S. Vasudevamurthy Department of Electrical and Electronics Dr. Ambedkar Institute
More informationChapter 2 MODELING AND CONTROL OF PEBB BASED SYSTEMS
Chapter 2 MODELING AND CONTROL OF PEBB BASED SYSTEMS 2.1 Introduction The PEBBs are fundamental building cells, integrating state-of-the-art techniques for large scale power electronics systems. Conventional
More informationDesign and implementation of Open & Close Loop Speed control of Three Phase Induction Motor Using PI Controller
Design and implementation of Open & Close Loop Speed control of Three Phase Induction Motor Using PI Controller Ibtisam Naveed 1, Adnan Sabir 2 1 (Electrical Engineering, NFC institute of Engineering and
More informationSimulation of Speed Control of Induction Motor with DTC Scheme Patel Divyaben Lalitbhai 1 Prof. C. A. Patel 2 Mr. B. R. Nanecha 3
IJSRD - International Journal for Scientific Research & Development Vol. 3, Issue 09, 2015 ISSN (online): 2321-0613 Simulation of Speed Control of Induction Motor with DTC Scheme Patel Divyaben Lalitbhai
More informationCHAPTER 4 MODIFIED H- BRIDGE MULTILEVEL INVERTER USING MPD-SPWM TECHNIQUE
58 CHAPTER 4 MODIFIED H- BRIDGE MULTILEVEL INVERTER USING MPD-SPWM TECHNIQUE 4.1 INTRODUCTION Conventional voltage source inverter requires high switching frequency PWM technique to obtain a quality output
More informationSpace Vector PWM and Model Predictive Control for Voltage Source Inverter Control
Space Vector PWM and Model Predictive Control for Voltage Source Inverter Control Irtaza M. Syed, Kaamran Raahemifar Abstract In this paper, we present a comparative assessment of Space Vector Pulse Width
More informationVector Approach for PI Controller for Speed Control of 3-Ø Induction Motor Fed by PWM Inverter with Output LC Filter
International Journal of Electronic and Electrical Engineering. ISSN 0974-2174 Volume 4, Number 2 (2011), pp. 195-202 International Research Publication House http://www.irphouse.com Vector Approach for
More informationVolume 1, Number 1, 2015 Pages Jordan Journal of Electrical Engineering ISSN (Print): , ISSN (Online):
JJEE Volume, Number, 2 Pages 3-24 Jordan Journal of Electrical Engineering ISSN (Print): 249-96, ISSN (Online): 249-969 Analysis of Brushless DC Motor with Trapezoidal Back EMF using MATLAB Taha A. Hussein
More informationControl of Induction Motor Fed with Inverter Using Direct Torque Control - Space Vector Modulation Technique
Control of Induction Motor Fed with Inverter Using Direct Torque Control - Space Vector Modulation Technique Vikas Goswami 1, Sulochana Wadhwani 2 1 Department Of Electrical Engineering, MITS Gwalior 2
More informationINDUCTION MOTOR SPEED CONTROL SIMULATION FOR TORQUE SPEED CHARACTERISTIC
Volume-3, Issue-3, March-215 INDUCTION MOTOR SPEED CONTROL SIMULATION FOR TORQUE SPEED CHARACTERISTIC 1 BHAGYASHREE SHIKKEWAL, 2 PRACHI M. PALPANKAR, 3 PRIYA DUGGAL 1 PCE Nagpur, 2 DBACER Nagpur, 3 DBACER
More informationCURRENT FOLLOWER APPROACH BASED PI AND FUZZY LOGIC CONTROLLERS FOR BLDC MOTOR DRIVE SYSTEM FED FROM CUK CONVERTER
CURRENT FOLLOWER APPROACH BASED PI AND FUZZY LOGIC CONTROLLERS FOR BLDC MOTOR DRIVE SYSTEM FED FROM CUK CONVERTER N. Mohanraj and R. Sankaran Shanmugha Arts, Science, Technology and Research Academy University,
More informationCHAPTER 3 SINGLE SOURCE MULTILEVEL INVERTER
42 CHAPTER 3 SINGLE SOURCE MULTILEVEL INVERTER 3.1 INTRODUCTION The concept of multilevel inverter control has opened a new avenue that induction motors can be controlled to achieve dynamic performance
More informationInternational Journal of Advance Engineering and Research Development
Scientific Journal of Impact Factor (SJIF): 4.14 International Journal of Advance Engineering and Research Development Volume 3, Issue 10, October -2016 e-issn (O): 2348-4470 p-issn (P): 2348-6406 Single
More informationNEW CRITERION FOR STATOR INTER TURN FAULT DETECTION OF SYNCHRONOUS GENERATOR
NEW CRITERION FOR STATOR INTER TURN FAULT DETECTION OF SYNCHRONOUS GENERATOR T. Karthik M.Tech Student Dept. of EEE, VNR VJIET Hyderabad, INDIA karthik97@gmail.com Abstract Generator is an important component
More informationAn Induction Motor Control by Space Vector PWM Technique
An Induction Motor Control by Space Vector PWM Technique Sanket Virani PG student Department of Electrical Engineering, Sarvajanik College of Engineering & Technology, Surat, India Abstract - This paper
More informationCHAPTER 4 CONTROL ALGORITHM FOR PROPOSED H-BRIDGE MULTILEVEL INVERTER
65 CHAPTER 4 CONTROL ALGORITHM FOR PROPOSED H-BRIDGE MULTILEVEL INVERTER 4.1 INTRODUCTION Many control strategies are available for the control of IMs. The Direct Torque Control (DTC) is one of the most
More informationEIE 015 Power Electronics (2009) Laboratory exercise 3. Active Filter Control
EIE 015 Power Electronics (2009) Laboratory exercise 3 Active Filter Control igrid cp iload ifilter Control of Electrical Drives. Laboratory exercise 2 2 1. Introduction In this lab a Shunt Active Filter
More information10kW Three-phase SiC PFC Rectifier
www.onsemi.com 10kW Three-phase SiC PFC Rectifier SEMICON EUROPA, Nov 13-18, 2018, Munich, Germany Contents General PFC Concept 3 Phase System and PFC Control Simulation Understanding the losses 3 Phase
More informationCONTROL SCHEME OF STAND-ALONE WIND POWER SUPPLY SYSTEM WITH BATTERY ENERGY STORAGE SYSTEM
CONTROL SCHEME OF STAND-ALONE WIND POWER SUPPLY SYSTEM WITH BATTERY ENERGY STORAGE SYSTEM 1 TIN ZAR KHAING, 2 LWIN ZA KYIN 1,2 Department of Electrical Power Engineering, Mandalay Technological University,
More informationTHE UNIVERSITY OF BRITISH COLUMBIA. Department of Electrical and Computer Engineering. EECE 365: Applied Electronics and Electromechanics
THE UNIVERSITY OF BRITISH COLUMBIA Department of Electrical and Computer Engineering EECE 365: Applied Electronics and Electromechanics Final Exam / Sample-Practice Exam Spring 2008 April 23 Topics Covered:
More informationMedium Voltage DC Testbed: Generator System GS-1
> REPLACE THIS LINE WITH YOUR PAPER IDENTIFICATION NUMBER (DOUBLE-CLICK HERE TO EDIT) < 1 Medium Voltage DC Testbed: Generator System GS-1 Michelle Bash and Ricky R. Chan Abstract In this paper, a description
More informationAnalysis of Voltage Source Inverters using Space Vector PWM for Induction Motor Drive
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676 Volume 2, Issue 6 (Sep-Oct. 2012), PP 14-19 Analysis of Voltage Source Inverters using Space Vector PWM for Induction
More informationSynchronous Current Control of Three phase Induction motor by CEMF compensation
Synchronous Current Control of Three phase Induction motor by CEMF compensation 1 Kiran NAGULAPATI, 2 Dhanamjaya Appa Rao, 3 Anil Kumar VANAPALLI 1,2,3 Assistant Professor, ANITS, Sangivalasa, Visakhapatnam,
More informationExperiment 4: Three-Phase DC-AC Inverter
1.0 Objectives he University of New South Wales School of Electrical Engineering & elecommunications ELEC4614 Experiment 4: hree-phase DC-AC Inverter his experiment introduces you to a three-phase bridge
More informationInvestigation of D-Statcom Operation in Electric Distribution System
J. Basic. Appl. Sci. Res., (2)29-297, 2 2, TextRoad Publication ISSN 29-434 Journal of Basic and Applied Scientific Research www.textroad.com Investigation of D-Statcom Operation in Electric Distribution
More informationAvailable online at ScienceDirect. Procedia Computer Science 85 (2016 )
Available online at www.sciencedirect.com ScienceDirect Procedia Computer Science 85 (26 ) 228 235 International Conference on Computational Modeling and Security (CMS 26) Fuzzy Based Real Time Control
More informationA Fuzzy Sliding Mode Controller for a Field-Oriented Induction Motor Drive
A Fuzzy Sliding Mode Controller for a Field-Oriented Induction Motor Drive Dr K B Mohanty, Member Department of Electrical Engineering, National Institute of Technology, Rourkela, India This paper presents
More informationMODELING AND VALIDATION OF A SYNCHRONOUS-MACHINE/ CONTROLLED-RECTIFIER SYSTEM
University of Kentucky UKnowledge Theses and Dissertations--Electrical and Computer Engineering Electrical and Computer Engineering 2014 MODELING AND VALIDATION OF A SYNCHRONOUS-MACHINE/ CONTROLLED-RECTIFIER
More informationCost Effective Control of Permanent Magnet Brushless Dc Motor Drive
Cost Effective Control of Permanent Magnet Brushless Dc Motor Drive N.Muraly #1 #1 Lecturer, Department of Electrical and Electronics Engineering, Karaikal Polytechnic College, Karaikal, India. Abstract-
More informationCHAPTER 2 D-Q AXES FLUX MEASUREMENT IN SYNCHRONOUS MACHINES
22 CHAPTER 2 D-Q AXES FLUX MEASUREMENT IN SYNCHRONOUS MACHINES 2.1 INTRODUCTION For the accurate analysis of synchronous machines using the two axis frame models, the d-axis and q-axis magnetic characteristics
More informationCourseware Sample F0
Electric Power / Controls Courseware Sample 85822-F0 A ELECTRIC POWER / CONTROLS COURSEWARE SAMPLE by the Staff of Lab-Volt Ltd. Copyright 2009 Lab-Volt Ltd. All rights reserved. No part of this publication
More informationCHAPTER 6 UNIT VECTOR GENERATION FOR DETECTING VOLTAGE ANGLE
98 CHAPTER 6 UNIT VECTOR GENERATION FOR DETECTING VOLTAGE ANGLE 6.1 INTRODUCTION Process industries use wide range of variable speed motor drives, air conditioning plants, uninterrupted power supply systems
More informationA Fuzzy Controlled PWM Current Source Inverter for Wind Energy Conversion System
7 International Journal of Smart Electrical Engineering, Vol.3, No.2, Spring 24 ISSN: 225-9246 pp.7:2 A Fuzzy Controlled PWM Current Source Inverter for Wind Energy Conversion System Mehrnaz Fardamiri,
More informationISSN: [Shukla* et al., 6(10): October, 2017] Impact Factor: 4.116
IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY SVPWM & SPWM CONTROLLER BASED PERFORMANCE EVALUATION OF THREE PHASE INDUCTION MOTOR Niraj Kumar Shukla *1, Rajeev Srivastava 2
More informationABSTRACT. Introduction
Simulation Of A 4-Switch,3-Phase Inverter Fed Induction Motor (IM) Drive System Prof. A.A.Apte AISSMS College of Engineering, Pune University/Pune, Maharashtra, India V.D.Malwade AISSMS College of Engineering,
More informationIJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 04, 2016 ISSN (online):
IJSRD - International Journal for Scientific Research & Development Vol. 4, Issue 04, 2016 ISSN (online): 2321-0613 Speed Control and Braking of Three-Phase IM Vipul Gupta 1 S. Phulambikar 2 1 P.G Scholar
More informationMatlab Simulation of Induction Motor Drive using V/f Control Method
IJSRD - International Journal for Scientific Research & Development Vol. 5, Issue 01, 2017 ISSN (online): 2321-0613 Matlab Simulation of Induction Motor Drive using V/f Control Method Mitul Vekaria 1 Darshan
More informationNew Direct Torque Control of DFIG under Balanced and Unbalanced Grid Voltage
1 New Direct Torque Control of DFIG under Balanced and Unbalanced Grid Voltage B. B. Pimple, V. Y. Vekhande and B. G. Fernandes Department of Electrical Engineering, Indian Institute of Technology Bombay,
More informationConventional Paper-II-2011 Part-1A
Conventional Paper-II-2011 Part-1A 1(a) (b) (c) (d) (e) (f) (g) (h) The purpose of providing dummy coils in the armature of a DC machine is to: (A) Increase voltage induced (B) Decrease the armature resistance
More informationCompensation for Neutral Point Potential in Three-Level Inverter by using Motor Currents
Compensation for Neutral Point Potential in Three-Level Inverter by using Motor Currents Eiichi Sakasegawa, Katsuji Shinohara Department of Electrical and Electronics Engineering, Faculty of Engineering,
More informationLab 4: PMSM Characterization. EE595S Fall 2005 S.D. Sudhoff
Lab 4: PMSM Characterization EE595S Fall 2005 S.D. Sudhoff 1 Machine to Characterize Reliance Electric 1 Hp Continuous at 2000 RPM Maximum Speed 5500 RPM Inertia: 0.012 Lb-in-sec^2 Continuous Stall Torque:
More informationLosses in Power Electronic Converters
Losses in Power Electronic Converters Stephan Meier Division of Electrical Machines and Power Electronics EME Department of Electrical Engineering ETS Royal Institute of Technology KTH Teknikringen 33
More informationImplementation of discretized vector control strategies for induction machines
Implementation of discretized vector control strategies for induction machines Report of Master of Science thesis Prepared By Md. Inoon Nishat Amalesh Chowdhury Department of Energy and Environment Division
More informationCHAPTER 3 COMBINED MULTIPULSE MULTILEVEL INVERTER BASED STATCOM
CHAPTER 3 COMBINED MULTIPULSE MULTILEVEL INVERTER BASED STATCOM 3.1 INTRODUCTION Static synchronous compensator is a shunt connected reactive power compensation device that is capable of generating or
More informationA Novel Five-level Inverter topology Applied to Four Pole Induction Motor Drive with Single DC Link
Research Article International Journal of Current Engineering and Technology E-ISSN 2277 4106, P-ISSN 2347-5161 2014 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet A Novel
More informationV/F Speed Control of 3 phase Induction Motor using Space Vector Modulation
V/F Speed Control of 3 phase Induction Motor using Space Vector Modulation Ms.Priya Subhash Raichurkar Asst.Prof.Electrical Engineering Department N.B.N Sinhgad college of Engineering, Solapur. Mr. Asif
More informationInduction motor control by vector control method.
International Refereed Journal of Engineering and Science (IRJES) e- ISSN :2319-183X p-issn : 2319-1821 On Recent Advances in Electrical Engineering Induction motor control by vector control method. Miss.
More informationABSTRACT I. INTRODUCTION
International Journal of Scientific Research in Computer Science, Engineering and Information Technology 2017 IJSRCSEIT Volume 2 Issue 6 ISSN : 2456-3307 Design of Shunt Active Power Filter for Power Quality
More information4. Simulation Results
4. Simulation Results An application of the computer aided control design of a starter/generator PMSM drive system discussed in Chapter 3, Figure 13, is presented in this chapter. A load torque profile
More informationChapter 2 Shunt Active Power Filter
Chapter 2 Shunt Active Power Filter In the recent years of development the requirement of harmonic and reactive power has developed, causing power quality problems. Many power electronic converters are
More informationCHAPTER 3 EQUIVALENT CIRCUIT AND TWO AXIS MODEL OF DOUBLE WINDING INDUCTION MOTOR
35 CHAPTER 3 EQUIVALENT CIRCUIT AND TWO AXIS MODEL OF DOUBLE WINDING INDUCTION MOTOR 3.1 INTRODUCTION DWIM consists of two windings on the same stator core and a squirrel cage rotor. One set of winding
More informationAnalysis & Hardware Implementation Of Three-Phase Voltage Source Inverter
Analysis & Hardware Implementation Of Three-Phase Voltage Source Inverter Prachi S. Dharmadhikari M-Tech Student: Electrical Engg.Department R.C.O.E.M, Nagpur (India) Gaurav N. Goyal Asst. Prof : Electrical
More informationAnalysis, Simulation and Implementation of Space Vector Pulse Width Modulation For Speed Control Of Induction Motor
Analysis, Simulation and Implementation of Space Vector Pulse Width Modulation For Speed Control Of Induction Motor Chetan T. Sawant 1, Dr. D. R. Patil 2 1 Student, Electrical Engineering Department, ADCET,
More informationCHAPTER 5 POWER QUALITY IMPROVEMENT BY USING POWER ACTIVE FILTERS
86 CHAPTER 5 POWER QUALITY IMPROVEMENT BY USING POWER ACTIVE FILTERS 5.1 POWER QUALITY IMPROVEMENT This chapter deals with the harmonic elimination in Power System by adopting various methods. Due to the
More informationPOWER ELECTRONICS LAB MANUAL
JIS College of Engineering (An Autonomous Institution) Department of Electrical Engineering POWER ELECTRONICS LAB MANUAL Exp-1. Study of characteristics of an SCR AIM: To obtain the V-I characteristics
More informationPower Electronics (BEG335EC )
1 Power Electronics (BEG335EC ) 2 PURWANCHAL UNIVERSITY V SEMESTER FINAL EXAMINATION - 2003 The figures in margin indicate full marks. Attempt any FIVE questions. Q. [1] [a] A single phase full converter
More informationUG Student, Department of Electrical Engineering, Gurunanak Institute of Engineering & Technology, Nagpur
A Review: Modelling of Permanent Magnet Brushless DC Motor Drive Ravikiran H. Rushiya 1, Renish M. George 2, Prateek R. Dongre 3, Swapnil B. Borkar 4, Shankar S. Soneker 5 And S. W. Khubalkar 6 1,2,3,4,5
More informationANALYSIS AND SIMULATION OF CASCADED FIVE AND SEVEN LEVEL INVERTER FED INDUCTION MOTOR
ANALYSIS AND SIMULATION OF CASCADED FIVE AND SEVEN LEVEL INVERTER FED INDUCTION MOTOR MANOJ KUMAR.N 1, KALIAPPAN.E 2, CHELLAMUTHU.C 3 1 Assistant Professor, Department of EEE, R.M.K Engineering College,
More informationIndex Terms: Vector control scheme, indirect vector control scheme, Scalar control, Marine propulsion I. INTRODUCTION
American International Journal of Research in Science, Technology, Engineering & Mathematics Available online at http://www.iasir.net ISSN (Print): 2328-3491, ISSN (Online): 2328-3580, ISSN (CD-ROM): 2328-3629
More information3. What is hysteresis loss? Also mention a method to minimize the loss. (N-11, N-12)
DHANALAKSHMI COLLEGE OF ENGINEERING, CHENNAI DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING EE 6401 ELECTRICAL MACHINES I UNIT I : MAGNETIC CIRCUITS AND MAGNETIC MATERIALS Part A (2 Marks) 1. List
More informationPESIT Bangalore South Campus Hosur road, 1km before Electronic City, Bengaluru -100 Department of Electronics & Communication Engineering
INTERNAL ASSESSMENT TEST 3 Date : 15/11/16 Marks: 0 Subject & Code: BASIC ELECTRICAL ENGINEERING -15ELE15 Sec : F,G,H,I,J,K Name of faculty : Mrs.Hema, Mrs.Dhanashree, Mr Nagendra, Mr.Prashanth Time :
More informationUNIT-III STATOR SIDE CONTROLLED INDUCTION MOTOR DRIVE
UNIT-III STATOR SIDE CONTROLLED INDUCTION MOTOR DRIVE 3.1 STATOR VOLTAGE CONTROL The induction motor 'speed can be controlled by varying the stator voltage. This method of speed control is known as stator
More informationTRACK VOLTAGE APPROACH USING CONVENTIONAL PI AND FUZZY LOGIC CONTROLLER FOR PERFORMANCE COMPARISON OF BLDC MOTOR DRIVE SYSTEM FED BY CUK CONVERTER
International Journal of Mechanical Engineering and Technology (IJMET) Volume 9, Issue 12, December 2018, pp. 778 786, Article ID: IJMET_09_12_078 Available online at http://www.ia aeme.com/ijmet/issues.asp?jtype=ijmet&vtype=
More informationOpen Loop V/F Control of Induction Motor based on PWM Technique
Open Loop V/F Control of Induction Motor based on PWM Technique Prof. Rajab Ibsaim #1, Eng. Ashraf Shariha #, Dr. Ali A Mehna *3 # Department of Electrical Engineering, Azawia University 1 Zawia-Libya
More informationMEM01: DC-Motor Servomechanism
MEM01: DC-Motor Servomechanism Interdisciplinary Automatic Controls Laboratory - ME/ECE/CHE 389 February 5, 2016 Contents 1 Introduction and Goals 1 2 Description 2 3 Modeling 2 4 Lab Objective 5 5 Model
More informationGATE 2009 Electrical Engineering
Q. No. 1 20 Carry One Mark Each GATE 2009 Electrical Engineering 1. The pressure coil of a dynamometer type wattmeter is (A) highly inductive (B) highly resistive (C) purely resistive (D) purely inductive
More informationAnalysis of Advanced Techniques to Eliminate Harmonics in AC Drives
Analysis of Advanced Techniques to Eliminate Harmonics in AC Drives Amit P. Wankhade 1, Prof. C. Veeresh 2 2 Assistant Professor, MIT mandsour E-mail- amitwankhade03@gmail.com Abstract Variable speed AC
More information( ) ON s inductance of 10 mh. The motor draws an average current of 20A at a constant back emf of 80 V, under steady state.
1991 1.12 The operating state that distinguishes a silicon controlled rectifier (SCR) from a diode is (a) forward conduction state (b) forward blocking state (c) reverse conduction state (d) reverse blocking
More informationSimulation Analysis of SPWM Variable Frequency Speed Based on Simulink
Sensors & Transducers 2014 by IFSA Publishing, S. L. http://www.sensorsportal.com Simulation Analysis of SPWM Variable Frequency Speed Based on Simulink Min-Yan DI Hebei Normal University, Shijiazhuang
More informationLecture 4 - Three-phase circuits, transformer and transient analysis of RLC circuits. Figure 4.1
Lecture 4 - Three-phase circuits, transformer and transient analysis of RLC circuits Power supply to sizeable power converters are often from three-phase AC source. A balanced three-phase source consists
More informationNicolò Antonante Kristian Bergaplass Mumba Collins
Norwegian University of Science and Technology TET4190 Power Electronics for Renewable Energy Mini-project 19 Power Electronics in Motor Drive Application Nicolò Antonante Kristian Bergaplass Mumba Collins
More informationSpeed Control of Induction Motor using Space Vector Modulation
SSRG International Journal of Electrical and Electronics Engineering (SSRG-IJEEE) volume Issue 12 December 216 Speed Control of Induction Motor using Space Vector Modulation K Srinivas Assistant Professor,
More informationInternational Journal of Advance Engineering and Research Development
Scientific Journal of Impact Factor (SJIF): 4.72 International Journal of Advance Engineering and Research Development Volume 4, Issue 4, April -217 e-issn (O): 2348-447 p-issn (P): 2348-646 Analysis,
More informationPublished in A R DIGITECH
www.ardigitech.in ISSN 232-883X,VOLUME 3 ISSUE 2,1/4/215 STUDY THE PERFORMANCE CHARACTERISTIC OF INDUCTION MOTOR Niranjan.S.Hugar*1, Basa vajyoti*2 *1 (lecturer of Electrical Engineering, Dattakala group
More informationSINGLE PHASE BRIDGELESS PFC FOR PI CONTROLLED THREE PHASE INDUCTION MOTOR DRIVE
SINGLE PHASE BRIDGELESS PFC FOR PI CONTROLLED THREE PHASE INDUCTION MOTOR DRIVE Sweatha Sajeev 1 and Anna Mathew 2 1 Department of Electrical and Electronics Engineering, Rajagiri School of Engineering
More informationCHAPTER 9. Sinusoidal Steady-State Analysis
CHAPTER 9 Sinusoidal Steady-State Analysis 9.1 The Sinusoidal Source A sinusoidal voltage source (independent or dependent) produces a voltage that varies sinusoidally with time. A sinusoidal current source
More informationLECTURE.3 : AC-DC CONVERSION
LECTURE.3 : AC-DC CONVERSION (RECTIFICATIONS) 3.1Basic Rectifier Circuits Several types of rectifier circuits are available: single-phase and three-phase half-wave and full-wave, controlled and uncontrolled,
More informationCHAPTER 2 STATE SPACE MODEL OF BLDC MOTOR
29 CHAPTER 2 STATE SPACE MODEL OF BLDC MOTOR 2.1 INTRODUCTION Modelling and simulation have been an essential part of control system. The importance of modelling and simulation is increasing with the combination
More informationImproved direct torque control of induction motor with dither injection
Sādhanā Vol. 33, Part 5, October 2008, pp. 551 564. Printed in India Improved direct torque control of induction motor with dither injection R K BEHERA andspdas Department of Electrical Engineering, Indian
More informationUser Guide IRMCS3041 System Overview/Guide. Aengus Murray. Table of Contents. Introduction
User Guide 0607 IRMCS3041 System Overview/Guide By Aengus Murray Table of Contents Introduction... 1 IRMCF341 Application Circuit... 2 Sensorless Control Algorithm... 4 Velocity and Current Control...
More information