Test. Class 2 Tuesday, February 3,2015. Efficiency Voltage regulation, O.C.& S.C. Tests

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1 Jahangirabad Institute of Technology MOHAMMED WARIS SENAN Assistant Professor Semester 4 th, 2016 MASTER SCHEDULE: ELECTRICAL MACHINES & CONTROL SYSTEM (NEE 409) week 1 Class 1 Monday, February 2,2015 Introduction to EMAC Single phase Transformer: Introduction Principle. week 1 Class 3 Wednesday, February 4,2015 Three Phase Transformer: Three phase transformer connections. week 1 Class 5 Friday, February 6,2015 D.C. Motors: Concept of starting, Speed control, Losses and Efficiency. Class 2 Tuesday, February 3,2015 Efficiency Voltage regulation, O.C.& S.C. Tests Class 4 Thursday, February 5,2015 Auto Transformer: Volt- Amp relations, Efficiency, Advantages & Disadvantages, Applications. Saturday, February 7,2015 No class (Sports Day) Week 2 Monday, February 9,2015 No class (Sports Day) Week 2 Class 7 Wednesday, February 11,2015 Test Week 2 Class 9 Friday, February 13,2015 torque- slip characteristics, Speed control of 3- phase I.M. Week 3 Class 10 Monday, February 16,2015 Alternator: Construction, e.m.f. equation, Voltage regulation and its determination by synchronous impedance method. Week 3 Class 11 Wednesday, February 18,2015 Synchronous Motor: Starting methods. Week 3 Class 13 Friday, February 20,2015 Servo Motor: Two phase AC and DC servo motors Week 4 Class 15 Monday, February 23,2015 Numerical Problems. Week 4 Class 17 Wednesday, February 25,2015 Revision of entire unit. Week 4 Class 19 Friday, February 27,2015 Modeling of Mechanical System: Linear mechanical elements, Force-voltage and forcecurrent analogy. Class 6 Tuesday, February 10,2015 numerical Class 8 Thursday, February 12,2015 Three phase Induction Motor: Construction, Equivalent circuit, Torque equation. Saturday, February 14,2015 No class (Holi day) Tuesday, February 17,2015 No class (Holi day) Class 12 Thursday, February 19,2015 Effect of excitation on line current (V-curves), Synchronous condenser. Class 14 Saturday, February 21,2015 Construction of two phase AC servo motor. & their applications. Class 16 Tuesday, February 24,2015 Numerical Problems. Class 18 Thursday, February 26,2015 Test Class 20 Saturday, February 28,2015 Electrical analog of simple mechanical systems. 1

2 Week 5 Class 21 Monday, March 2,2015 Concept of transfer function. Week 5 Class 23 Wednesday, March 4,2015 Control System: Open loop & closed loop controls systems. Week 5 Friday, March 6,2015 No class (Holi day) Week 6 Monday, March 9,2015 No Class (Sessional I) Week 6 Wednesday, March 11,2015 No Class (Sessional I) Week 6 Class 26 Friday, March 13,2015 Periodic signals with their mathematical representation and characteristics. Week 7 Class 28 Monday, March 16,2015 Numerical Problems Week 7 Class 30 Wednesday, March 18,2015 Time Response Analysis: Time response of a standard second order system.(through Numeric Problems) Week 7 Class 32 Friday, March 20,2015 Stability: Concept and types of stability..(through Numeric Problems) Week 8 Class 34 Monday, March 23,2015 Polar plot, Nyquist stability criterion and assessment of stability..(through Numeric Problems) Week 8 Class 36 Wednesday, March 25,2015 Numerical Problems Week 8 Class 38 Friday, March 27,2015 Revision Week 9 Class 39 Monday, March 30,2015 Test Week 9 Class 40 Wednesday, April 01,2015 Construction of root loci. Week 9 Class 41 Friday, April 03,2015 Bode plot, Gain margin and Phase margin and their determination Week 10 Class 43 Monday, April 06,2015 Bode plot, Gain margin and Phase margin and their determination Class 22 Tuesday, March 3,2015 Determinations of transfer function for simple systems. Class 24 Thursday, March 5,2015 advantages and disadvantages of open and closed loop system. Saturday, March 7,2015 No class (Holi day) Tuesday, March 10,2015 No Class (Sessional I) Class 25 Thursday, March 12,2015 Signals: Unit step, Unit ramp, Unit impulse. Class 27 Saturday, March 14,2015 Revision of the unit. Class 29 Tuesday, March 17,2015 Numerical Problems Class 31 Thursday, March 19,2015 Response specifications of second order system..(through Numeric Problems) Class 33 Saturday, March 21,2015 Routh Hurwitz Criterion and its application for determination of stability..(through Numeric Problems) Class 35 Tuesday, March 24,2015 Polar plot, Nyquist stability criterion and assessment of stability continue..(through Numeric Problems) Class 37 Thursday, March 26,2015 Numerical Problems Saturday, March 28,2015 No Class (Holi day) Tuesday, March 31,2015 Root Locus Techniques: Concept of root locus. Thursday, April 02,2015 No class( Holiday) Class 42 Saturday, April 04,2015 Bode plot, Gain margin and Phase margin and their determination Class 44 Tuesday, April 07,2015 Process control : Introduction to P, PI controllers. 2

3 Week 10 Class 45 Wednesday, April 08,2015 PID controllers. Week 10 Class 47 Friday, April 10,2015 Numerical Problems on Induction machines Practice session-1. Class 46 Thursday, April 09,2015 Characteristics, representation and applications. Class 48 Saturday, April 11,2015 Numerical Problems on Induction machines Practice session-2 Details are found in the following sections: General Information, Class Schedule, and Project Schedule. GENERAL INFORMATION Teaching Staff: Mr. Mohammad Imran, JIT EE, Course Web Site: Class Meetings: JIT HoD Room EE Goals : This subject is combination of Electrical machine and control system.so main object of this ourse will e to i ti ate stude t s est k owledge a out oder day machines as well as the controlling instruments with possible methods of control system. At the completion of the course students should be able to describe the constructions/features/application/operation of machines as well as all the methods of control. Course Objectives: A. At the time of Sessional Exam No. 1 (after approximately 24 (Fifty five minutes of lectures), the students should be able describe the following: 1. Understand the concepts of transformers (single phase, three phase and auto.) 2. Construction and performance of DC motors. 3. Difference between Single phase and three phase Induction motor. 4. S C and O C test of transformer. 5. e.m.f. injection in rotor circuit of slip ring controls. 6. Equivalent circuit. 7. Speed control methods. 8. Construction and application of alternators. 9. Should know the operation modes of Single phase I.M. 3

4 10. Construction and application of synchronous motor. B. By the time of Exam No. 2 (after approximately 25 lectures), the students should be able describe the items listed below: 1. Synchronous condenser and servo motor. 2. Modeling of mechanical system. 3. Difference between open loop system and closed loop system. 4. Transfer function. 5. Routh Hurwitz criterion. 6. Nyquist plot, Root loci plot. 7. Applications of Bode plot. 8. Polar plot. 9. P, Pi and PID controllers. Course Outcome: 1. Able to analyze the performance of the machines. 2. Able to design and calculate the losses, efficiency and parameters of the machines and transformers. 3. Able to verify the theoretical results with analytical solution. 4. Able to generate the concepts regarding basics of Electrical Engineering such as Active power, Reactive Power, Power Factor will be enhanced. 5. Conversion.(Electrical to mechanical and vice versa) Grading: Based On Four Points: 1. Sessional Marks (2 hours paper/ 30 Marks) 2. Attendance (10 Marks) 3. Assignments (Total 5/5 Marks) 4. Class Test (Total 3 / 10 Marks) Class Preparation and Participation: Reading assignments are given in the Class Schedule for each class session. You are expected to come to class prepared to discuss the readings and the suggested questions. Your individual class participation grade will be based upon your in-class remarks during discussions. 4

5 Classes and Topics Class 1 Monday, February 2,2015 The core of the power TRANSFORMER is usually made of laminated cold-rolled magnetic steel that is grain oriented such that the rolling direction is the same as that of the flux lines. This type of core construction tends to reduce the eddy current and hysteresis losses. The eddy current loss Pe is proportional to the square of the product of the maximum flux density BM(T), the frequency f(hz), and thickness t(m) of the individual steel lamination. Core and Shell Types Transformers are constructed in either a shell or a core structure.the shell-type transformer is one where the windings are completely surrounded by transformer steel in the plane of the coil.core- type transformers are those that are not shell type. Class 2 Tuesday, February 3,2015 There is a need to assess the quality of a particular transformer design. The most important measure for performance is the concept of efficiency, defined as follows: Class 3 Wednesday, February 4,2015 5

6 Class 4 Thursday, February 5,2015 e.m.f. injection in rotor circuit of slip ring controls. Auto Transformer: Volt- Amp relations, Efficiency, Advantages & Disadvantages, Applications. Class 5 Friday, February 6,2015 Class 6 Tuesday, February 10,2015 Numerical practice Class 7 Wednesday, February 11,2015 6

7 Test Class 8 Thursday, February 12,2015 Three Phase Induction Motor: Poly phase ac motors are primarily three-phase and are by far the largest electric prime mover in all of industry. They are offered in ranges from 5 up to 50,000 hp and account for a large percentage of the total motor industry in the world. In number of units, the three-phase squirrel cage induction motor is the most common. It is commercially available from 1 hp up to several thousand horsepower and can be used on conventional ac power or in conjunction with adjustable speed ac drives. Fans, pumps, and material handling are the most common applications. When the torque-speed characteristics of a conventional ac induction motor need to be modified, the wound rotor induction motor is used. These motors replace the squirrel cage rotor with a wound rotor and slip rings. External resistors are used to adjust the torque-speed characteristics for speed control in such applications as ac cranes and elevators. Class 9 Friday, February 13,2015 Induction Motor Analysis. The characteristic algebraic equations for the steady-state power, torque and efficiency of the ac induction motor are derived. All voltages and currents are in sinusoidal steady state. The derivation of the equations can be simplified by defining the complex motor impedance as, 7

8 8

9 9

10 Class 10 Monday, February 16,2015 Alternator: Construction, e.m.f. equation, Voltage regulation and its determination by synchronous impedance method. AC Generators Today, most electric power is produced by synchronous generators. Synchronous generators rotate at a constant speed, called synchronous speed. This speed is dictated by the operating frequency of the system and the machine structure. There are also ac generators that do not necessarily rotate at a fixed speed such as those found in windmills (induction generators); these generators, however, account for only a very small percentage of today s ge erated power. Class 11 Wednesday, February 18,2015 Synchronous motors Single-phase synchronous motors are only used below about 1/10 of a horsepower. Typical applications are timing and motion control, where low torque is required at fixed speeds. Class 12 Thursday, February 19,2015 Synchronous condenser: Power factor plays an important role in power engineering, In this session, we will discuss that how synchronous condenser improves power factor of a circuit. Class 13 Friday, February 20,2015 Servo Motor: Two phase AC and DC servo motors In this session, we will discuss about types of servo motors. Class 14 Saturday, February 21,2015 Construction of two phase AC servo motor. In this session, explanation about construction of the AC servo motor. Class 15 Monday, February 23,2015 Numerical Problems. Class 16 Tuesday, February 24,2015 Numerical Problems. Class 17 Wednesday, February 25,2015 Revision of entire unit. Class 18 Thursday, February 26,2015 Test. Class 19 Friday, February 27,2015 Modeling of Mechanical System: Linear mechanical elements, Force-voltage and force- current analogy. Class 20 Saturday, February 28,2015 Electrical analog of simple mechanical systems. Class 21 Monday, March 2,

11 Concept of transfer function. Class 22 Tuesday, March 3,2015 Measures of the Steady-State Response In the steady state, the accuracy of the time response is an indication of how well the dynamic response follows a desired time trajectory. Usually a test signal (reference signal) is selected to measure accuracy. In this configuration, the objective is to force y(t) to track a reference signal r(t) as close as possible. Class 23 Wednesday, March 4,2015 Control System: Open loop & closed loop controls systems. Definition, block diagram and examples of open and closed loop. Class 24 Thursday, March 5,2015 Advantages and disadvantages of open and closed loop system. Class 25 Thursday, March 12,2015 Signals: Unit step, Unit ramp, Unit impulse. Definition and schematic representation. Class 26 Friday, March 13,2015 Periodic signals with their mathematical representation and characteristics. Class 27 Saturday, March 14,2015 Demagnetizing effect, permanent magnet dc motors. Class 28 Monday, March 16,2015 Revision of the unit. Class 29 Tuesday, March 17,2015 Numerical Problems Class 30 Wednesday, March 18,2015 Numerical Problems. 11

12 Class 31 Thursday, March 19,2015 Time Response Analysis: Time response of a standard second order system.(through Numeric Problems) Class 32 Friday, March 20,2015 Numeric Problems Class 33 Saturday, March 21,2015 Numeric Problems Class 34 Monday, March 23,2015 Numeric Problems Class 35 Tuesday, March 24,2015 Numeric Problems Class 36 Wednesday, March 25,2015 Numeric Problems Class 37 Thursday, March 26,2015 Numeric Problems Class 38 Friday, March 27,2015 Revision Class 39 Monday, March 30,2015 test Motors Class 40 Wednesday, April 01,2015 Construction of root loci. through numeric problem Class 41 Friday, April 03,2015 Bode plot, Gain margin and Phase margin and their determination (through numeric problem) Class 42 Saturday, April 04,2015 Bode plot, Gain margin and Phase margin and their determination (through numeric problem) Class 43 Monday, April 06,2015 Bode plot, Gain margin and Phase margin and their determination (through numeric problem) Class 44 Tuesday, April 07,

13 Class 45 Wednesday, April 08,

14 Class 46 Thursday, April 09,2015 Characteristics, representation and applications. Class 47 Friday, April 10,2015 Numerical Problems on Induction machines READING PACKET TABLE OF CONTENTS Reading Title 1. Dr. P. S. bimbhra, Electrical Machinery, Khanna Publisher 2. Ashfaq Hussain, Elctrical Machines, Dhanpat Rai & Company 3. Bakshi & Bakshi, Electromechanical Energy Conversion-II 4. Fitzerald, A.E., Kingsley and S.D. Umans, Electric Machinery,Mc Graw Hill. 5. S.kartiya and sons. S.Hasan Sayeed 14

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