Analysis Of Induction Motor With Broken Rotor Bars Using Discrete Wavelet Transform Princy P 1 and Gayathri Vijayachandran 2

Size: px
Start display at page:

Download "Analysis Of Induction Motor With Broken Rotor Bars Using Discrete Wavelet Transform Princy P 1 and Gayathri Vijayachandran 2"

Transcription

1 Analysis Of Induction Motor With Broken Rotor Bars Using Discrete Wavelet Transform Princy P 1 and Gayathri Vijayachandran 2 1 Dept. Of Electrical and Electronics, Sree Buddha College of Engineering 2 Dept. Of Electrical and Electronics, Sree Buddha College of Engineering, Kerala Abstract This paper presents the analysis of startup transient current signals of squirrel cage induction motor with broken rotor bars using Wavelet Transform (WT). At light load there occurs a difficulty to distinguish a faulty rotor with a healthy rotor. Since the length of the startup transient is only a few cycles depending on the load, all the information regarding the machine s condition will be present within this transient. Because the Fourier Transform is integrating over infinity, all the information that exists during the start up transient will be lost. This poses the problem that the Fourier Transform cannot be used. The Wavelet Transform is used to analyze the start up transient. Also the wavelet technique helps to provide additional information about its transient characteristics which cannot be detected using Fast Fourier Transform (FFT). Finally, the resulting wavelet coefficients are then compared with different degrees of broken rotor. Keywords induction motor; startup transient; brokenrotors; Fast Fourier Transform; Wavelet Transform I. INTRODUCTION Induction machines play a very important role in the field of electromechanical energy conversion. They are widely used in variety of diverse industries product line, process manufacturing, automation applications, heating and air conditioning, transportation, aerospace and marine propulsion application to the health care industry. Even though the induction motors are well designed there may be possibilities of incipient failure which may damages the entire machine operation. Fault diagnosis on induction motor is one of the important concerns in the electric drives industry as 8% of the electric drives industry is working on Induction motors [1]. Severe voltage stresses would be occurred for motors driven by solid state inverters due to rapid switch-on and switch-off of semiconductor switches. Also, induction motors are required to operate in highly corrosive and dusty environments. This results in the development of insulation materials of improved quality and treatment processes. However, the design of cage rotor and its manufacturing have undergone little change. As a result, a large percentage of total induction motor failures is due to rotor problems. Cage rotors are basically of two types: cast and fabricated. Previously, cast rotors were only used in small machines. However, with the advent of cast ducted rotors, casting technology can be used even for rotors of machines in the range of 3 kw. Fabricated rotors are generally found in larger or special-application machines. Cast rotors, although more rugged than the fabricated type, can almost never be repaired once faults like cracked or broken rotor bars develop in them. Broken rotor bars are one of the most severe induction motor faults. It can be caused by thermal stresses due to thermal overload and unbalance, hot spots or excessive losses, sparking (mainly fabricated rotors), magnetic stresses caused by electromagnetic forces, unbalanced magnetic pull, electromagnetic noise and vibration, residual stresses due to manufacturing problems, dynamic stresses arising from shaft torques, centrifugal forces and cyclic stresses, environmental stresses caused by contamination and abrasion of rotor material due to chemicals or moisture, mechanical stresses due to lose laminations, fatigued parts, bearing failure, etc All rights Reserved 496

2 Volume 3, Issue 4, [April 216] ISSN (Online): ; ISSN (Print): Broken rotor bar detection is based on monitoring the amplitudes of the double slip frequency sidebands of the fundamental supply frequency in the current spectrum. It has been shown that the greater is the severity of rotor bar fault, the higher is the amplitude of these sidebands. However, the sideband amplitude is sensitive to motor loading. At no load or at light loads, it is difficult to detect those broken rotor bars due to small rotor currents. Furthermore, a broken rotor bar fault at an early stage or partially broken rotor bars, which can lead to a larger failure or even be catastrophic, may not be detectable even under full load conditions. Therefore, there is a strong need to develop condition monitoring techniques to address these issues to allow earlier detection of rotor faults. During direct-on-line (DOL) starting, the rotor current of the induction machine is very high, typically 5 to 6 times of the rated current. Under these conditions, rotor faults should be much more evident than under normal running conditions. There is also the advantage that the starting current is less sensitive than the running current to the level of motor load, and so valid information can be obtained even with motors with no mechanical load [3]. The fault diagnosis based on the signal processing methods is very widely used as it is a noninvasive method. While using signal processing based fault diagnosis we need to reduce the time taken for the diagnosis. The Fourier Transform produces detailed frequency information of a waveform. It produces excellent results when the waveforms examined are stationary or periodic. Since the signal here used is a transient one, the Fourier transform is an inappropriate one. The advanced version of Fourier Transform is short time Fourier Transform (STFT) which can be used to analyze small sections of the signal at a time. The STFT provides a compromise between time and frequency based views of a signal and it provides some information about both. However, the window size used is of fixed size, the information provided by STFT is of limited precision [4]. The Wavelet Transform (WT) was then introduced with the idea of overcoming the difficulties mentioned above. A windowing technique with variable-size region has been adopted to perform the stator current signal analysis. Wavelet analysis allows to diagnosing the rotor fault even under no load condition. The advantages of using wavelet transform are: it does not suffer from constant window size, it shows variable window for every frequency and does not show resolution problem due to its multi resolution feature. Wavelet analysis allows in providing more precise low frequency information by using long time intervals and high frequency information from short time intervals. Since the variation of stator start up currents shows a clear indication of broken bars, this technique allows an excellent understanding of the nature of the phenomenon. II. BROKEN ROTOR BAR DETECTION TECHNIQUE The induction machine is highly symmetrical. When a three-phase symmetrical stator winding are fed from a symmetrical supply will produce a resultant forward rotating magnetic field at synchronous speed. An exact symmetric field does not produce any backward rotating field. If any asymmetry of the supply or stator winding impedances occurs, it will cause a resultant backward rotating field from the stator winding. Applying the same rotating magnetic field fundamentals to the rotor winding; the main difference from stator winding is that the frequency of the induced electromotive force (EMF) and current in the rotor winding is at slip frequency and not at the supply frequency as in the case of stator. So the rotor currents will also produce a rotating field which will rotate at slip frequency. This happens only when the cage winding is symmetrical. If rotor bars are broken there occurs an asymmetry, then there will be a resultant backward rotating field at slip frequency with respect to the forward rotating rotor. The result of is that, the magnetic field produced by the rotor will oscillate at twice the slip frequency 2sf, where f is the supply frequency. According to Faraday s Law this oscillating magnetic field will induce an electro motive force in the stator winding which will result in the occurrence of stator current components at the same 2sf frequency. However, since the magnetic field produced by these rotor currents are also moving in space at synchronous speed will also induce an EMF and hence current at synchronous frequency. Since All rights Reserved 497

3 Volume 3, Issue 4, [April 216] ISSN (Online): ; ISSN (Print): induction motor, the rotor is moving in a speed less than synchronous speed, the resulting stator EMF and its consequent current will have a component at a frequency equal to (f-2sf) which is equal to f(1-2s). This frequency component in the stator current spectrum is used for rotor fault diagnosis which is called Left Side Band component (LSB). The current component at f(1-2s) produces a consequent torque pulsation at twice slip frequency. This results in consequent speed pulsations at this slip frequency which results in stator current components at f (1+2s). This process of interaction of stator current harmonics, torque oscillation and consequent speed ripple will continue to induce stator current harmonics at (1±ks) f, where k = 2,4,6. III. ROTOR FAULT DIAGNOSIS USING WAVELET TRANSFORM Since non periodic signals have been used to analyze the faulty condition here, Fourier Transform cannot be used as it uses a periodic signal. For getting valid information about a faulty condition, transient signals have been used. If a signal is distorted in a localized time instant, the whole frequency spectrum can be affected. To reduce the effect of non-periodic signals on the Fourier Transform, the short-time Fourier transform (STFT) is used. But it assumes constant window size for all frequencies. The WT is a powerful signal processing tool used fault diagnosis. The WT, like the STFT, allows time localization of dissimilar frequency components of a given signal; however the main difference between these two is that STFT uses constant window size while WT uses a variable one. As a result both frequency and time resolution is fixed for the consequent waveforms but for WT the wavelets that are the analyzing functions will adjust their time width such that narrow will be the high frequency wavelets and broader will be the low frequency wavelets [5]. Wavelet theory has been proved to be a dominant tool for the analysis of transient processes. The wavelet transform provides a time frequency representation of a signal. Discrete Wavelet Transform (DWT) decomposes the current in a set of signals. Each of these signals contains the information of the original signal. The implementation procedure of DWT for an original signal S is explained here. At the initial stage the signal S is divided into two halves of the frequency bandwidth and sent to both high pass filter and low pass filter. The high frequency signals are called detailed signals and low frequency signals are called approximate signals. Then the output of LPF is again divided into half of the frequency bandwidth and sent to the next stage. When the signal is decomposed into a pre-defined level, this procedure stops. According to Nyquist s theorem, the highest frequency that could contain in the signal must be fs/2 Hertz if the original signal S is sampled at fs Hertz. This frequency is considered as the first detail. Hence the frequency band from to fs/2 will be the approximate 1 and f/2 to fs/4 will be in detail 1. Likewise, the frequency band from fs/4 to fs/8 will be in detail 2 and so on. Daubechies-1 has been selected as the mother wavelet in this paper. The advantage of Daubechies is its perfect reconstruction of signal without losing of information. Furthermore, the precision of broken rotor bar diagnosis can be improved by using high order wavelets [6]. Figure 1. Broken rotor bar detection technique IV. SIMULATION RESULTS Wavelet transform has been widely used for rotor fault diagnosis. The simulation results of current, torque and waveforms obtained for induction motor which is being modelled in MATLAB are shown in Fig. 2., Fig. 3. and Fig.4. Induction motor with broken bars has also been modelled All rights Reserved 498

4 Volume 3, Issue 4, [April 216] ISSN (Online): ; ISSN (Print): MATLAB and the torque, current waveforms are obtained. Fig 5, Fig. 6 shows the speed torque waveform for four and eight number of broken rotor bars respectively. From the results it is evident that as the number of broken bars increases the speed torque curve shows more oscillations as explained in the theoretical part. Figure 2. Simulink model of Induction motor with broken rotor bars s ta to r c u rre n t (A ) time(sec) Figure 3. Stator current for healthy induction motor 6 T o r q u e speed Figure 4. Speed Torque waveform for healthy induction motor 4 2 torque speed Figure 5. Speed torque waveforms for eight broken rotor All rights Reserved 499

5 Volume 3, Issue 4, [April 216] ISSN (Online): ; ISSN (Print): stator current (A) time(sec) Figure 6. Stator current for induction motor with four bars broken 15 current(a) time(sec) Figure 7. Stator current for induction motor with eight bars broken Stator current signals are analyzed for both healthy and healthy condition using wavelet transform. The original signal is decomposed at the 4 th level of decomposition. The signal is decomposed into two, one is detailed signal and other one is approximated signal. High frequency information lies in the detailed signals whereas the low frequency information lies in the approximated signals. The mother wavelet used in this work is Daubechies (db1). The advantage of using Daubechies as the mother wavelet is that it is most stable and while reconstruction of the signal it does not lose any information from the wavelet coefficients. The low frequency approximated fourth level signals are used to diagnose the fault. Approximated level 3 and level 4 have been obtained and compared for different number of broken bars. Figure 8. and Figure 9. show the stator current waveforms for four and eight number of broken bars. The current shows more oscillations and the transient nature is decreased as the number of broken bars increases. Fig. 9 and 1 show the approximated level 3 and level 4 normal current waveforms. Also the decomposed signals for different number of broken bars are shown in Figure 1, Figure 11, and Figure 12. From the results obtained it is clear that 4 th level signals provide a better comparison from healthy motor with a faulty one current No: of samples Figure 8. Approximated db1 level 3 decomposed signal of normal current waveform 2 15 current No: of samples Figure 9. Approximated db1 level 4 decomposed signal for normal All rights Reserved 5

6 Volume 3, Issue 4, [April 216] ISSN (Online): ; ISSN (Print): Current No: of samples Figure 1. Approximated level 3 decomposed signals with four broken bars 2 15 current No:of samples Figure 11. Approximated level 4 decomposed signals with four broken bars V. CONCLUSION Thus it can be concluded that wavelet transform can be successfully used to detect the broken rotor bar condition by analyzing the start up transient current signals. Also approximation signals are used for finding low frequency broken rotor fault diagnosis. If the decomposition on current signal is performed then low frequency information can be obtained which contains useful information of the fault. The analysis is performed for different number of broken bars and the waveforms are obtained. Faults under transient condition can be easily found out using this method. Hence the ability of this tool for early fault detection becomes dominant in the area of induction motor rotor fault detection. REFERENCES [1] S.M Shashidhara, Tradeoff Analysis of Wavelet Transform techniques for the Detection of Broken rotor bars in induction, International Journal of Advanced Research in Electrical, Electronics and Instrumentation,vol.3,ISSN , July 213 [2] Neelam Mehala, Ratna Dahiya, Rotor Faults Detection in Induction Motor by Wavelet Analysis, International Journal of Engineering Science and Technology, vol.1 (3),29 [3] Khadim Moin Siddiqui, V.K. Giri, Broken Rotor Bar Fault Detection in Induction Motors using Transient Current Analysis, International Journal Of Electronics and Communication Technology,vol.2. Oct-Dec,211 [4] A.A. Da Silva et al., Rotating machinery monitoring and diagnosis using short-time Fourier transform and wavelet techniques, Proceedings of the 1997 International Conference on Maintenance and Reliability, Knoxville (USA), vol. 1, pp [5] S.M Shashidhara, Tradeoff Analysis of Wavelet Transform techniques for the Detection of Broken rotor bars in induction, International Journal of Advanced Research in Electrical, Electronics and Instrumentation,vol.3,ISSN , July 213 [6] Jawad Faiz, B.M. Ebrahimi, B.Asaie, A Criterion Function for Broken Bar Fault Diagnosis in Induction Motor under load variations using Wavelet Transform, International Conference on Electrical Machines ans All rights Reserved 51

ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS

ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS SZABÓ Loránd DOBAI Jenő Barna BIRÓ Károly Ágoston Technical University of Cluj (Romania) 400750 Cluj, P.O. Box 358,

More information

A Comparative Study of FFT, STFT and Wavelet Techniques for Induction Machine Fault Diagnostic Analysis

A Comparative Study of FFT, STFT and Wavelet Techniques for Induction Machine Fault Diagnostic Analysis A Comparative Study of FFT, STFT and Wavelet Techniques for Induction Machine Fault Diagnostic Analysis NEELAM MEHALA, RATNA DAHIYA Department of Electrical Engineering National Institute of Technology

More information

Time- Frequency Techniques for Fault Identification of Induction Motor

Time- Frequency Techniques for Fault Identification of Induction Motor International Journal of Electronic Networks Devices and Fields. ISSN 0974-2182 Volume 8 Number 1 (2016) pp. 13-17 International Research Publication House http://www.irphouse.com Time- Frequency Techniques

More information

Stator Winding Fault in Induction Motor

Stator Winding Fault in Induction Motor Chapter 7 Stator Winding Fault in Induction Motor Chapter Outline Stator is one of the major fault areas in an induction motor. Stator fault initiates as a turn to turn short fault of its winding which

More information

Fault Detection in Three Phase Induction Motor

Fault Detection in Three Phase Induction Motor Fault Detection in Three Phase Induction Motor A.Selvanayakam 1, W.Rajan Babu 2, S.K.Rajarathna 3 Final year PG student, Department of Electrical and Electronics Engineering, Sri Eshwar College of Engineering,

More information

Broken Rotor Bar Fault Detection using Wavlet

Broken Rotor Bar Fault Detection using Wavlet Broken Rotor Bar Fault Detection using Wavlet sonalika mohanty Department of Electronics and Communication Engineering KISD, Bhubaneswar, Odisha, India Prof.(Dr.) Subrat Kumar Mohanty, Principal CEB Department

More information

GEARBOX FAULT DETECTION BY MOTOR CURRENT SIGNATURE ANALYSIS. A. R. Mohanty

GEARBOX FAULT DETECTION BY MOTOR CURRENT SIGNATURE ANALYSIS. A. R. Mohanty ICSV14 Cairns Australia 9-12 July, 2007 GEARBOX FAULT DETECTION BY MOTOR CURRENT SIGNATURE ANALYSIS A. R. Mohanty Department of Mechanical Engineering Indian Institute of Technology, Kharagpur Kharagpur,

More information

INDUCTION MOTOR FAULT DIAGNOSTICS USING FUZZY SYSTEM

INDUCTION MOTOR FAULT DIAGNOSTICS USING FUZZY SYSTEM INDUCTION MOTOR FAULT DIAGNOSTICS USING FUZZY SYSTEM L.Kanimozhi 1, Manimaran.R 2, T.Rajeshwaran 3, Surijith Bharathi.S 4 1,2,3,4 Department of Mechatronics Engineering, SNS College Technology, Coimbatore,

More information

Frequency Converter Influence on Induction Motor Rotor Faults Detection Using Motor Current Signature Analysis Experimental Research

Frequency Converter Influence on Induction Motor Rotor Faults Detection Using Motor Current Signature Analysis Experimental Research SDEMPED 03 Symposium on Diagnostics for Electric Machines, Power Electronics and Drives Atlanta, GA, USA, 24-26 August 03 Frequency Converter Influence on Induction Motor Rotor Faults Detection Using Motor

More information

Fault Diagnosis of an Induction Motor Using Motor Current Signature Analysis

Fault Diagnosis of an Induction Motor Using Motor Current Signature Analysis Fault Diagnosis of an Induction Motor Using Motor Current Signature Analysis Swapnali Janrao and Prof. Mrs. Rupalee Ambekar Department of Electrical Engineering, BVP s College of Engineering (Deemed to

More information

SIGNATURE ANALYSIS FOR ON-LINE MOTOR DIAGNOSTICS

SIGNATURE ANALYSIS FOR ON-LINE MOTOR DIAGNOSTICS Page 1 of 10 2015-PPIC-0187 SIGNATURE ANALYSIS FOR ON-LINE MOTOR DIAGNOSTICS Ian Culbert Senior Member, IEEE Qualitrol-Iris Power 3110 American Drive Mississauga, ON Canada Abstract - Stator current signature

More information

UNIT-III STATOR SIDE CONTROLLED INDUCTION MOTOR DRIVE

UNIT-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 information

Application of Electrical Signature Analysis. Howard W Penrose, Ph.D., CMRP President, SUCCESS by DESIGN

Application of Electrical Signature Analysis. Howard W Penrose, Ph.D., CMRP President, SUCCESS by DESIGN Application of Electrical Signature Analysis Howard W Penrose, Ph.D., CMRP President, SUCCESS by DESIGN Introduction Over the past months we have covered traditional and modern methods of testing electric

More information

Keywords: Wavelet packet transform (WPT), Differential Protection, Inrush current, CT saturation.

Keywords: Wavelet packet transform (WPT), Differential Protection, Inrush current, CT saturation. IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Differential Protection of Three Phase Power Transformer Using Wavelet Packet Transform Jitendra Singh Chandra*, Amit Goswami

More information

Swinburne Research Bank

Swinburne Research Bank Swinburne Research Bank http://researchbank.swinburne.edu.au Tashakori, A., & Ektesabi, M. (2013). A simple fault tolerant control system for Hall Effect sensors failure of BLDC motor. Originally published

More information

Simulation Analysis of Three Phase & Line to Ground Fault of Induction Motor Using FFT

Simulation Analysis of Three Phase & Line to Ground Fault of Induction Motor Using FFT www.ijird.com June, 4 Vol 3 Issue 6 ISSN 78 (Online) Simulation Analysis of Three Phase & Line to Ground Fault of Induction Motor Using FFT Anant G. Kulkarni Research scholar, Dr. C. V. Raman University,

More information

CHAPTER 3 WAVELET TRANSFORM BASED CONTROLLER FOR INDUCTION MOTOR DRIVES

CHAPTER 3 WAVELET TRANSFORM BASED CONTROLLER FOR INDUCTION MOTOR DRIVES 49 CHAPTER 3 WAVELET TRANSFORM BASED CONTROLLER FOR INDUCTION MOTOR DRIVES 3.1 INTRODUCTION The wavelet transform is a very popular tool for signal processing and analysis. It is widely used for the analysis

More information

NON-INVASIVE ROTOR BAR FAULTS DIAGNOSIS OF INDUCTION MACHINES USING VIRTUAL INSTRUMENTATION

NON-INVASIVE ROTOR BAR FAULTS DIAGNOSIS OF INDUCTION MACHINES USING VIRTUAL INSTRUMENTATION NON-INVASIVE ROTOR BAR FAULTS DIAGNOSIS OF INDUCTION MACHINES USING VIRTUAL INSTRUMENTATION Loránd SZABÓ Károly Ágoston BIRÓ Jenő Barna DOBAI Technical University of Cluj (Romania) 3400 Cluj, P.O. Box

More information

Prognostic Health Monitoring for Wind Turbines

Prognostic Health Monitoring for Wind Turbines Prognostic Health Monitoring for Wind Turbines Wei Qiao, Ph.D. Director, Power and Energy Systems Laboratory Associate Professor, Department of ECE University of Nebraska Lincoln Lincoln, NE 68588-511

More information

[Nayak, 3(2): February, 2014] ISSN: Impact Factor: 1.852

[Nayak, 3(2): February, 2014] ISSN: Impact Factor: 1.852 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Classification of Transmission Line Faults Using Wavelet Transformer B. Lakshmana Nayak M.TECH(APS), AMIE, Associate Professor,

More information

LabVIEW Based Condition Monitoring Of Induction Motor

LabVIEW Based Condition Monitoring Of Induction Motor RESEARCH ARTICLE OPEN ACCESS LabVIEW Based Condition Monitoring Of Induction Motor 1PG student Rushikesh V. Deshmukh Prof. 2Asst. professor Anjali U. Jawadekar Department of Electrical Engineering SSGMCE,

More information

Bearing fault detection of wind turbine using vibration and SPM

Bearing fault detection of wind turbine using vibration and SPM Bearing fault detection of wind turbine using vibration and SPM Ruifeng Yang 1, Jianshe Kang 2 Mechanical Engineering College, Shijiazhuang, China 1 Corresponding author E-mail: 1 rfyangphm@163.com, 2

More information

Wavelet Transform Based Islanding Characterization Method for Distributed Generation

Wavelet Transform Based Islanding Characterization Method for Distributed Generation Fourth LACCEI International Latin American and Caribbean Conference for Engineering and Technology (LACCET 6) Wavelet Transform Based Islanding Characterization Method for Distributed Generation O. A.

More information

Vibration Analysis of Induction Motors with Unbalanced Loads

Vibration Analysis of Induction Motors with Unbalanced Loads Vibration Analysis of Induction Motors with Unbalanced Loads Selahattin GÜÇLÜ 1, Abdurrahman ÜNSAL 1 and Mehmet Ali EBEOĞLU 1 1 Dumlupinar University, Department of Electrical Engineering, Tavşanlı Yolu,

More information

Feature Extraction of Magnetizing Inrush Currents in Transformers by Discrete Wavelet Transform

Feature Extraction of Magnetizing Inrush Currents in Transformers by Discrete Wavelet Transform Feature Extraction of Magnetizing Inrush Currents in Transformers by Discrete Wavelet Transform Patil Bhushan Prataprao 1, M. Mujtahid Ansari 2, and S. R. Parasakar 3 1 Dept of Electrical Engg., R.C.P.I.T.

More information

Detection of Broken Bars in Induction Motors Using a Neural Network

Detection of Broken Bars in Induction Motors Using a Neural Network Detection of Broken Bars in Induction Motors Using a Neural Network 245 JPE 6-3-7 Detection of Broken Bars in Induction Motors Using a Neural Network M. Moradian *, M. Ebrahimi **, M. Danesh ** and M.

More information

Detection of Broken Damper Bars of a Turbo Generator by the Field Winding

Detection of Broken Damper Bars of a Turbo Generator by the Field Winding Detection of Broken Damper Bars of a Turbo Generator by the Field Winding J. Bacher 1 1 Institute of Electrical Machines and Drive Technology E.M.A, University of Technology Graz Kopernikusgasse, 8010

More information

INVESTIGATION OF THE IMPACT OF SPEED-RIPPLE AND INERTIA ON THE STEADY-STATE CURRENT SPECTRUM OF A DFIG WITH UNBALANCED ROTOR

INVESTIGATION OF THE IMPACT OF SPEED-RIPPLE AND INERTIA ON THE STEADY-STATE CURRENT SPECTRUM OF A DFIG WITH UNBALANCED ROTOR INVESTIGATION OF THE IMPACT OF SPEED-RIPPLE AND INERTIA ON THE STEADY-STATE CURRENT SPECTRUM OF A DFIG WITH UNBALANCED ROTOR S. Djurović*, S. Williamson *School of Electrical and Electronic Engineering,

More information

DETECTION AND DIAGNOSIS OF STATOR INTER TURN SHORT CIRCUIT FAULT OF AN INDUCTION MACHINE

DETECTION AND DIAGNOSIS OF STATOR INTER TURN SHORT CIRCUIT FAULT OF AN INDUCTION MACHINE J ib/^o^/^ /Cj DETECTION AND DIAGNOSIS OF STATOR INTER TURN SHORT CIRCUIT FAULT OF AN INDUCTION MACHINE A dissertation submitted to the Department of Electrical Engineering, University of Moratuwa In partial

More information

Keywords Wavelet, induction motor, fault diagnosis, fast Fourier transform, fault indicator, fault tolerant control.

Keywords Wavelet, induction motor, fault diagnosis, fast Fourier transform, fault indicator, fault tolerant control. Volume 4, Issue 8, August 2014 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Bearing Fault

More information

BROKEN ROTOR BARS DETECTION IN SQUIRREL-CAGE INDUCTION MACHINES BY MOTOR CURRENT SIGNATURE ANALYSIS METHOD

BROKEN ROTOR BARS DETECTION IN SQUIRREL-CAGE INDUCTION MACHINES BY MOTOR CURRENT SIGNATURE ANALYSIS METHOD Scientific Bulletin of the Electrical Engineering Faculty Year 11 No. 3 (17) ISSN 1843-6188 BROKEN ROTOR BARS DETECTION IN SQUIRREL-CAGE INDUCTION MACHINES BY MOTOR CURRENT SIGNATURE ANALYSIS METHOD C.

More information

Vibration and Current Monitoring for Fault s Diagnosis of Induction Motors

Vibration and Current Monitoring for Fault s Diagnosis of Induction Motors Vibration and Current Monitoring for Fault s Diagnosis of Induction Motors Mariana IORGULESCU, Robert BELOIU University of Pitesti, Electrical Engineering Departament, Pitesti, ROMANIA iorgulescumariana@mail.com

More information

CHAPTER 6 BRIDGELESS PFC CUK CONVERTER FED PMBLDC MOTOR

CHAPTER 6 BRIDGELESS PFC CUK CONVERTER FED PMBLDC MOTOR 105 CHAPTER 6 BRIDGELESS PFC CUK CONVERTER FED PMBLDC MOTOR 6.1 GENERAL The line current drawn by the conventional diode rectifier filter capacitor is peaked pulse current. This results in utility line

More information

Overview of IAL Software Programs for the Calculation of Electrical Drive Systems

Overview of IAL Software Programs for the Calculation of Electrical Drive Systems for the Calculation of Electrical Drive Systems Combines FEM with analytical post-processing analytical Machine type Topic Electrically excited Salientpole rotor Synchronous machines Cylindrical rotor

More information

Current-Based Diagnosis for Gear Tooth Breaks in Wind Turbine Gearboxes

Current-Based Diagnosis for Gear Tooth Breaks in Wind Turbine Gearboxes Current-Based Diagnosis for Gear Tooth Breaks in Wind Turbine Gearboxes Dingguo Lu Student Member, IEEE Department of Electrical Engineering University of Nebraska-Lincoln Lincoln, NE 68588-5 USA Stan86@huskers.unl.edu

More information

University of Huddersfield Repository

University of Huddersfield Repository University of Huddersfield Repository Alwodai, Ahmed Motor Fault Diagnosis Using Higher Order Statistical Analysis of Motor Power Supply Parameters Original Citation Alwodai, Ahmed (215) Motor Fault Diagnosis

More information

ANALYSIS OF EFFECTS OF VECTOR CONTROL ON TOTAL CURRENT HARMONIC DISTORTION OF ADJUSTABLE SPEED AC DRIVE

ANALYSIS OF EFFECTS OF VECTOR CONTROL ON TOTAL CURRENT HARMONIC DISTORTION OF ADJUSTABLE SPEED AC DRIVE ANALYSIS OF EFFECTS OF VECTOR CONTROL ON TOTAL CURRENT HARMONIC DISTORTION OF ADJUSTABLE SPEED AC DRIVE KARTIK TAMVADA Department of E.E.E, V.S.Lakshmi Engineering College for Women, Kakinada, Andhra Pradesh,

More information

PeakVue Analysis for Antifriction Bearing Fault Detection

PeakVue Analysis for Antifriction Bearing Fault Detection Machinery Health PeakVue Analysis for Antifriction Bearing Fault Detection Peak values (PeakVue) are observed over sequential discrete time intervals, captured, and analyzed. The analyses are the (a) peak

More information

SYNCHRONOUS MACHINES

SYNCHRONOUS MACHINES SYNCHRONOUS MACHINES The geometry of a synchronous machine is quite similar to that of the induction machine. The stator core and windings of a three-phase synchronous machine are practically identical

More information

Improving the Reliability in PMSM for Wind Turbine

Improving the Reliability in PMSM for Wind Turbine International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 6, Issue 11 (April 2013), PP. 55-61 Improving the Reliability in PMSM for Wind Turbine

More information

Modelling for Interior Faults of Induction Motors and Its Simulation on EMTDC

Modelling for Interior Faults of Induction Motors and Its Simulation on EMTDC International Conference on Power Systems Transients IPST 003 in New Orleans, USA Modelling for Interior Faults of Induction Motors and Its Simulation on EMTDC exiang Cai, Aiyun Gao, and Jiandong Jiang

More information

Health Monitoring and Fault Diagnosis in Induction Motor- A Review

Health Monitoring and Fault Diagnosis in Induction Motor- A Review Health Monitoring and Fault Diagnosis in Induction Motor- A Review Khadim Moin Siddiqui 1, Kuldeep Sahay 2, V.K.Giri 3 Ph.D. Scholar, Dept.of EE, Institute of Engineering & Technology, Lucknow, Uttar Pradesh,

More information

A Comparison of Different Techniques for Induction Motor Rotor Fault Diagnosis

A Comparison of Different Techniques for Induction Motor Rotor Fault Diagnosis Journal of Physics: Conference Series A Comparison of Different Techniques for Induction Motor Rotor Fault Diagnosis To cite this article: A Alwodai et al 212 J. Phys.: Conf. Ser. 364 1266 View the article

More information

Behavior of Induction Motor at Voltage Unbalanced

Behavior of Induction Motor at Voltage Unbalanced Behavior of Induction Motor at Voltage Unbalanced Rajashree U Patil Electrical Engineering MTech Power Student, VJTI Matunga, Mumbai, India Abstract A three phase induction motors are very commonly employed

More information

1 INTRODUCTION 2 MODELLING AND EXPERIMENTAL TOOLS

1 INTRODUCTION 2 MODELLING AND EXPERIMENTAL TOOLS Investigation of Harmonic Emissions in Wound Rotor Induction Machines K. Tshiloz, D.S. Vilchis-Rodriguez, S. Djurović The University of Manchester, School of Electrical and Electronic Engineering, Power

More information

ELECTRIC MACHINES MODELING, CONDITION MONITORING, SEUNGDEOG CHOI HOMAYOUN MESHGIN-KELK AND FAULT DIAGNOSIS HAMID A. TOLIYAT SUBHASIS NANDI

ELECTRIC MACHINES MODELING, CONDITION MONITORING, SEUNGDEOG CHOI HOMAYOUN MESHGIN-KELK AND FAULT DIAGNOSIS HAMID A. TOLIYAT SUBHASIS NANDI ELECTRIC MACHINES MODELING, CONDITION MONITORING, AND FAULT DIAGNOSIS HAMID A. TOLIYAT SUBHASIS NANDI SEUNGDEOG CHOI HOMAYOUN MESHGIN-KELK CRC Press is an imprint of the Taylor & Francis Croup, an informa

More information

Time-Frequency Enhancement Technique for Bevel Gear Fault Diagnosis

Time-Frequency Enhancement Technique for Bevel Gear Fault Diagnosis Time-Frequency Enhancement Technique for Bevel Gear Fault Diagnosis Dennis Hartono 1, Dunant Halim 1, Achmad Widodo 2 and Gethin Wyn Roberts 3 1 Department of Mechanical, Materials and Manufacturing Engineering,

More information

Comparison and Detection of Abnormal Conditions in Induction Motors

Comparison and Detection of Abnormal Conditions in Induction Motors Comparison and Detection of Abnormal Conditions in Induction Motors Mehrdad Heidari 1, Ghodratollah Seifossadat 2, Davar Mirabbasi 1 mehrdad266@yahoo.com, seifossadat@yahoo.com, dmirabbasi@yahoo.com 1

More information

Bahram Amin. Induction Motors. Analysis and Torque Control. With 41 Figures and 50 diagrams (simulation plots) Springer

Bahram Amin. Induction Motors. Analysis and Torque Control. With 41 Figures and 50 diagrams (simulation plots) Springer Bahram Amin Induction Motors Analysis and Torque Control With 41 Figures and 50 diagrams (simulation plots) Springer 1 Main Parameters of Induction Motors 1.1 Introduction 1 1.2 Structural Elements of

More information

ISSN (Online) Volume 4, Issue 5, September October (2013), IAEME TECHNOLOGY (IJEET)

ISSN (Online) Volume 4, Issue 5, September October (2013), IAEME TECHNOLOGY (IJEET) INTERNATIONAL International Journal of Electrical JOURNAL Engineering OF and ELECTRICAL Technology (IJEET), ENGINEERING ISSN 0976 6545(Print), & TECHNOLOGY (IJEET) ISSN 0976 6545(Print) ISSN 0976 6553(Online)

More information

Stability of Voltage using Different Control strategies In Isolated Self Excited Induction Generator for Variable Speed Applications

Stability of Voltage using Different Control strategies In Isolated Self Excited Induction Generator for Variable Speed Applications Stability of Voltage using Different Control strategies In Isolated Self Excited Induction Generator for Variable Speed Applications Shilpa G.K #1, Plasin Francis Dias *2 #1 Student, Department of E&CE,

More information

A NEW MOTOR SPEED MEASUREMENT ALGORITHM BASED ON ACCURATE SLOT HARMONIC SPECTRAL ANALYSIS

A NEW MOTOR SPEED MEASUREMENT ALGORITHM BASED ON ACCURATE SLOT HARMONIC SPECTRAL ANALYSIS A NEW MOTOR SPEED MEASUREMENT ALGORITHM BASED ON ACCURATE SLOT HARMONIC SPECTRAL ANALYSIS M. Aiello, A. Cataliotti, S. Nuccio Dipartimento di Ingegneria Elettrica -Università degli Studi di Palermo Viale

More information

Generator Advanced Concepts

Generator Advanced Concepts Generator Advanced Concepts Common Topics, The Practical Side Machine Output Voltage Equation Pitch Harmonics Circulating Currents when Paralleling Reactances and Time Constants Three Generator Curves

More information

Current Signature Analysis of Induction Motor Mechanical Faults by Wavelet Packet Decomposition

Current Signature Analysis of Induction Motor Mechanical Faults by Wavelet Packet Decomposition IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 50, NO. 6, DECEMBER 2003 1217 Current Signature Analysis of Induction Motor Mechanical Faults by Wavelet Packet Decomposition Zhongming Ye, Member, IEEE,

More information

Application Note. GE Grid Solutions. Multilin 8 Series 869 Broken Rotor Bar Detection. Introduction

Application Note. GE Grid Solutions. Multilin 8 Series 869 Broken Rotor Bar Detection. Introduction GE Grid Solutions Multilin 8 Series 869 Broken Rotor Bar Detection Application Note GE Publication Number: GET-20061 Copyright 2018 GE Multilin Inc. Introduction The Multilin 869 motor protection relay

More information

RCL filter to suppress motor terminal overvoltage in PWM inverter fed Permanent Magnet synchronous motor with long cable leads

RCL filter to suppress motor terminal overvoltage in PWM inverter fed Permanent Magnet synchronous motor with long cable leads RCL filter to suppress motor terminal overvoltage in PWM inverter fed Permanent Magnet synchronous motor with long cable leads M.B.RATHNAPRIYA1 A.JAGADEESWARAN2 M.E scholar, Department of EEE Sona College

More information

CHAPTER 2 CURRENT SOURCE INVERTER FOR IM CONTROL

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 information

Journal of Engineering Technology

Journal of Engineering Technology A novel mitigation algorithm for switch open-fault in parallel inverter topology fed induction motor drive M. Dilip *a, S. F. Kodad *b B. Sarvesh *c a Department of Electrical and Electronics Engineering,

More information

EE 410/510: Electromechanical Systems Chapter 5

EE 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 information

CLASSIFICATION OF POWER QUALITY DISTURBANCES USING WAVELET TRANSFORM AND S-TRANSFORM BASED ARTIFICIAL NEURAL NETWORK

CLASSIFICATION OF POWER QUALITY DISTURBANCES USING WAVELET TRANSFORM AND S-TRANSFORM BASED ARTIFICIAL NEURAL NETWORK CLASSIFICATION OF POWER QUALITY DISTURBANCES USING WAVELET TRANSFORM AND S-TRANSFORM BASED ARTIFICIAL NEURAL NETWORK P. Sai revathi 1, G.V. Marutheswar 2 P.G student, Dept. of EEE, SVU College of Engineering,

More information

Permanent Magnet Machine Can Be a Vibration Sensor for Itself M. Barański

Permanent Magnet Machine Can Be a Vibration Sensor for Itself M. Barański Permanent Magnet Machine Can Be a Vibration Sensor for Itself M. Barański Abstract This article presents a new vibration diagnostic method designed to (PM) machines with permanent magnets. Those devices

More information

Design and Implementation of an On-line Diagnosis System of IM Electrical FaultsUsing MCSA and ANN Based on Labview

Design and Implementation of an On-line Diagnosis System of IM Electrical FaultsUsing MCSA and ANN Based on Labview AUSTRALIAN JOURNAL OF BASIC AND APPLIED SCIENCES ISSN:1991-8178 EISSN: 2309-8414 Journal home page: www.ajbasweb.com Design and Implementation of an On-line Diagnosis System of IM Electrical FaultsUsing

More information

Wavelet Transform for Classification of Voltage Sag Causes using Probabilistic Neural Network

Wavelet Transform for Classification of Voltage Sag Causes using Probabilistic Neural Network International Journal of Electrical Engineering. ISSN 974-2158 Volume 4, Number 3 (211), pp. 299-39 International Research Publication House http://www.irphouse.com Wavelet Transform for Classification

More information

Effects of the Short-Circuit Faults in the Stator Winding of Induction Motors and Fault Detection through the Magnetic Field Harmonics

Effects of the Short-Circuit Faults in the Stator Winding of Induction Motors and Fault Detection through the Magnetic Field Harmonics The 8 th International Symposium on ADVANCED TOPICS IN ELECTRICAL ENGINEERING The Faculty of Electrical Engineering, U.P.B., Bucharest, May 23-24, 2013 Effects of the Short-Circuit Faults in the Stator

More information

GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12

GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12 GRAAD 12 NATIONAL SENIOR CERTIFICATE GRADE 12 ELECTRICAL TECHNOLOGY EXEMPLAR 2014 MEMORANDUM MARKS: 200 This memorandum consists of 13 pages. Electrical Technology 2 DBE/2014 INSTRUCTIONS TO THE MARKERS

More information

Volume 1, Number 1, 2015 Pages Jordan Journal of Electrical Engineering ISSN (Print): , ISSN (Online):

Volume 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 information

Electrical Machines Diagnosis

Electrical Machines Diagnosis Monitoring and diagnosing faults in electrical machines is a scientific and economic issue which is motivated by objectives for reliability and serviceability in electrical drives. This concern for continuity

More information

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering Vol. 2, Issue 6, June 2013

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering Vol. 2, Issue 6, June 2013 Efficient Harmonics Reduction Based Three Phase H Bridge Speed Controller for DC Motor Speed Control using Hysteresis Controlled Synchronized Pulse Generator Sanjay Kumar Patel 1, Dhaneshwari Sahu 2, Vikrant

More information

MITIGATION OF POWER QUALITY DISTURBANCES USING DISCRETE WAVELET TRANSFORMS AND ACTIVE POWER FILTERS

MITIGATION OF POWER QUALITY DISTURBANCES USING DISCRETE WAVELET TRANSFORMS AND ACTIVE POWER FILTERS MITIGATION OF POWER QUALITY DISTURBANCES USING DISCRETE WAVELET TRANSFORMS AND ACTIVE POWER FILTERS 1 MADHAVI G, 2 A MUNISANKAR, 3 T DEVARAJU 1,2,3 Dept. of EEE, Sree Vidyanikethan Engineering College,

More information

Application Note. Motor Bearing Current Phenomenon. Rev: Doc#: AN.AFD.17 Yaskawa Electric America, Inc August 7, /9

Application Note. Motor Bearing Current Phenomenon. Rev: Doc#: AN.AFD.17 Yaskawa Electric America, Inc August 7, /9 Application Note Application Note Motor Bearing Current Phenomenon Rev: 08-08 Doc#: AN.AFD.17 Yaskawa Electric America, Inc. 2008 www.yaskawa.com August 7, 2008 1/9 INTRODUCTION Since the introduction

More information

CHAPTER 3 EQUIVALENT CIRCUIT AND TWO AXIS MODEL OF DOUBLE WINDING INDUCTION MOTOR

CHAPTER 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 information

EVALUATION OF MOTOR ONLINE DIAGNOSIS BY FEM SIMULATIONS

EVALUATION OF MOTOR ONLINE DIAGNOSIS BY FEM SIMULATIONS EVALUATION OF MOTOR ONLINE DIAGNOSIS BY FEM SIMULATIONS Thanis Sribovornmongkol Master s Thesis XR-EE-EME 2006:04 Electrical Machines and Power Electronics School of Electrical Engineering Royal Institute

More information

Comparative Investigation of Diagnostic Media for Induction Motors: A Case of Rotor Cage Faults

Comparative Investigation of Diagnostic Media for Induction Motors: A Case of Rotor Cage Faults 1092 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 47, NO. 5, OCTOBER 2000 Comparative Investigation of Diagnostic Media for Induction Motors: A Case of Rotor Cage Faults Andrzej M. Trzynadlowski,

More information

SVC Compensated Multi Terminal Transmission System Digital Protection Scheme using Wavelet Transform Approach

SVC Compensated Multi Terminal Transmission System Digital Protection Scheme using Wavelet Transform Approach SVC Compensated Multi Terminal Transmission System Digital Protection Scheme using Wavelet Transform Approach J.Uday Bhaskar 1, S.S Tulasiram 2, G.Ravi Kumar 3 JNTUK 1, JNTUH 2, JNTUK 3 udayadisar@gmail.com

More information

Guan, L, Gu, F, Shao, Y, Fazenda, BM and Ball, A

Guan, L, Gu, F, Shao, Y, Fazenda, BM and Ball, A Gearbox fault diagnosis under different operating conditions based on time synchronous average and ensemble empirical mode decomposition Guan, L, Gu, F, Shao, Y, Fazenda, BM and Ball, A Title Authors Type

More information

VIBRATIONAL MEASUREMENT ANALYSIS OF FAULT LATENT ON A GEAR TOOTH

VIBRATIONAL MEASUREMENT ANALYSIS OF FAULT LATENT ON A GEAR TOOTH VIBRATIONAL MEASUREMENT ANALYSIS OF FAULT LATENT ON A GEAR TOOTH J.Sharmila Devi 1, Assistant Professor, Dr.P.Balasubramanian 2, Professor 1 Department of Instrumentation and Control Engineering, 2 Department

More information

On Line Fault Identification of Induction Motor using Fuzzy System

On Line Fault Identification of Induction Motor using Fuzzy System On Line Fault Identification of Induction Motor using Fuzzy System 1 D. K. Chaturvedi, 2 Akash Gautam, 3 Mayank Pratap Singh, 4 Md. Sharif Iqbal Dept. of Electrical Engineering, Faculty of Engineering,

More information

Research Article A Novel Technique for Rotor Bar Failure Detection in Single-Cage Induction Motor Using FEM and MATLAB/SIMULINK

Research Article A Novel Technique for Rotor Bar Failure Detection in Single-Cage Induction Motor Using FEM and MATLAB/SIMULINK Mathematical Problems in Engineering Volume 211, Article ID 62689, 14 pages doi:1.1155/211/62689 Research Article A Novel Technique for Rotor Bar Failure Detection in Single-Cage Induction Motor Using

More information

Inter Harmonics of Cycloconveter Excited Induction Motor and Design its Filter Circuit

Inter Harmonics of Cycloconveter Excited Induction Motor and Design its Filter Circuit International Journal of Electrical Engineering. ISSN 974-2158 Volume 5, Number 3 (212), pp. 329-334 International Research Publication House http://www.irphouse.com Inter Harmonics of Cycloconveter Excited

More information

Fault Diagnosis of Gearbox Using Various Condition Monitoring Indicators for Non-Stationary Speed Conditions: A Comparative Analysis

Fault Diagnosis of Gearbox Using Various Condition Monitoring Indicators for Non-Stationary Speed Conditions: A Comparative Analysis nd International and 17 th National Conference on Machines and Mechanisms inacomm1-13 Fault Diagnosis of Gearbox Using Various Condition Monitoring Indicators for Non-Stationary Speed Conditions: A Comparative

More information

CASE STUDIES IN ONLINE AND OFFLINE MOTOR ANALYSIS

CASE STUDIES IN ONLINE AND OFFLINE MOTOR ANALYSIS CASE STUDIES IN ONLINE AND OFFLINE MOTOR ANALYSIS David L. McKinnon, PdMA Corporation, Member, IEEE Abstract In this paper we present three case studies using online and offline motor analysis to prevent

More information

Condition monitoring methods, failure identification and analysis for Induction machines

Condition monitoring methods, failure identification and analysis for Induction machines Condition monitoring methods, failure identification and analysis for Induction machines Neelam Mehala, Ratna Dahiya Abstract Induction motors are a critical component of many industrial processes and

More information

Analysis of Wound Rotor Induction Machine Low Frequency Vibroacoustic Emissions under Stator Winding Fault Conditions

Analysis of Wound Rotor Induction Machine Low Frequency Vibroacoustic Emissions under Stator Winding Fault Conditions Analysis of Wound Rotor Induction Machine Low Frequency Vibroacoustic Emissions under Stator Winding Fault Conditions N Sarma, Q Li, S. Djurović, A C Smith, S M Rowland University of Manchester, School

More information

Comparison of Different Modulation Strategies Applied to PMSM Drives Under Inverter Fault Conditions

Comparison of Different Modulation Strategies Applied to PMSM Drives Under Inverter Fault Conditions Comparison of Different Modulation Strategies Applied to PMSM Drives Under Inverter Fault Conditions Jorge O. Estima and A.J. Marques Cardoso University of Coimbra, FCTUC/IT, Department of Electrical and

More information

Beating Phenomenon of Multi-Harmonics Defect Frequencies in a Rolling Element Bearing: Case Study from Water Pumping Station

Beating Phenomenon of Multi-Harmonics Defect Frequencies in a Rolling Element Bearing: Case Study from Water Pumping Station Beating Phenomenon of Multi-Harmonics Defect Frequencies in a Rolling Element Bearing: Case Study from Water Pumping Station Fathi N. Mayoof Abstract Rolling element bearings are widely used in industry,

More information

Fault Diagnosis of Wind Turbine Gearboxes Using Enhanced Tacholess Order Tracking

Fault Diagnosis of Wind Turbine Gearboxes Using Enhanced Tacholess Order Tracking Fault Diagnosis of Wind Turbine Gearboxes Using Enhanced Tacholess Order Tracking M ohamed A. A. Ismail 1, Nader Sawalhi 2 and Andreas Bierig 1 1 German Aerospace Centre (DLR), Institute of Flight Systems,

More information

FAULT DETECTION AND DIAGNOSIS OF HIGH SPEED SWITCHING DEVICES IN POWER INVERTER

FAULT DETECTION AND DIAGNOSIS OF HIGH SPEED SWITCHING DEVICES IN POWER INVERTER FAULT DETECTION AND DIAGNOSIS OF HIGH SPEED SWITCHING DEVICES IN POWER INVERTER R. B. Dhumale 1, S. D. Lokhande 2, N. D. Thombare 3, M. P. Ghatule 4 1 Department of Electronics and Telecommunication Engineering,

More information

Unbalance Detection in Flexible Rotor Using Bridge Configured Winding Based Induction Motor

Unbalance Detection in Flexible Rotor Using Bridge Configured Winding Based Induction Motor Unbalance Detection in Flexible Rotor Using Bridge Configured Winding Based Induction Motor Natesan Sivaramakrishnan, Kumar Gaurav, Kalita Karuna, Rahman Mafidur Department of Mechanical Engineering, Indian

More information

Abstract. Introduction. correct current. control. Sensorless Control. into. distortion in. implementation. pulse introduces a large speeds as show in

Abstract. Introduction. correct current. control. Sensorless Control. into. distortion in. implementation. pulse introduces a large speeds as show in Sensorless Control of High Power Induction Motors Using Multilevel Converters K. Saleh, M. Sumner, G. Asher, Q. Gao Department of Electrical and Electronic Engineering, University of Nottingham, Nottingham,

More information

SHAFT MISALIGNMENT PREDICTION ON BASIS OF DISCRETE WAVELET TRANSFORM

SHAFT MISALIGNMENT PREDICTION ON BASIS OF DISCRETE WAVELET TRANSFORM International Journal of Mechanical Engineering and Technology (IJMET) Volume 9, Issue 7, July 2018, pp. 336 344, Article ID: IJMET_09_07_038 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=9&itype=7

More information

Signal Processing based Wavelet Approach for Fault Detection of Induction Motor

Signal Processing based Wavelet Approach for Fault Detection of Induction Motor Signal Processing based Wavelet Approach for Detection of Induction Motor A.U.Jawadear 1, Dr G.M.Dhole 2, S.R.Parasar 3 Department of Electrical Engineering, S.S.G.M. College of Engineering Shegaon. (M.S.),44203,

More information

Doubly Fed Induction Generator Analysis Through Wavelet Technique

Doubly Fed Induction Generator Analysis Through Wavelet Technique Journal of Engineering Science and Technology Review 2 (1) (2009) 63-67 Research Article JOURNAL OF Engineering Science and Technology Review www.jestr.org Doubly Fed Induction Generator Analysis Through

More information

DIAGNOSIS OF ROLLING ELEMENT BEARING FAULT IN BEARING-GEARBOX UNION SYSTEM USING WAVELET PACKET CORRELATION ANALYSIS

DIAGNOSIS OF ROLLING ELEMENT BEARING FAULT IN BEARING-GEARBOX UNION SYSTEM USING WAVELET PACKET CORRELATION ANALYSIS DIAGNOSIS OF ROLLING ELEMENT BEARING FAULT IN BEARING-GEARBOX UNION SYSTEM USING WAVELET PACKET CORRELATION ANALYSIS Jing Tian and Michael Pecht Prognostics and Health Management Group Center for Advanced

More information

Multiple Faults Diagnosis in Induction Motor Using the MCSA Method

Multiple Faults Diagnosis in Induction Motor Using the MCSA Method International Journal of Signal and Image Processing (Vol.1-21/Iss.3) Messaoudi and Sbita / Multiple Faults Diagnosis in Induction Motor Using the MCSA Method / pp. 19-195 Multiple Faults Diagnosis in

More information

Current based Normalized Triple Covariance as a bearings diagnostic feature in induction motor

Current based Normalized Triple Covariance as a bearings diagnostic feature in induction motor 19 th World Conference on Non-Destructive Testing 2016 Current based Normalized Triple Covariance as a bearings diagnostic feature in induction motor Leon SWEDROWSKI 1, Tomasz CISZEWSKI 1, Len GELMAN 2

More information

A Novel Approach to Electrical Signature Analysis

A Novel Approach to Electrical Signature Analysis A Novel Approach to Electrical Signature Analysis Howard W Penrose, Ph.D., CMRP Vice President, Engineering and Reliability Services Dreisilker Electric Motors, Inc. Abstract: Electrical Signature Analysis

More information

Tripping of circuit breakers in PV installations due to zero sequence field impedance

Tripping of circuit breakers in PV installations due to zero sequence field impedance Tripping of circuit breakers in PV installations due to zero sequence field impedance B. Verhelst 1,2, C. Debruyne 1,2, J. Desmet 1,2 1 dept. Electrical Engineering - Lemcko HoWest Kortrijk, Belgium bart.verhelst@howest.be

More information

Progress In Electromagnetics Research B, Vol. 53, , 2013

Progress In Electromagnetics Research B, Vol. 53, , 2013 Progress In Electromagnetics Research B, Vol. 53, 291 314, 213 FAULT PREDICTION OF DEEP BAR CAGE ROTOR INDUCTION MOTOR BASED ON FEM Basil Saied 1 and Ahmed Ali 2, * 1 Electrical Engineering Department,

More information

Simulation Analysis of SPWM Variable Frequency Speed Based on Simulink

Simulation 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 information

RESEARCH PAPER CONDITION MONITORING OF SIGLE POINT CUTTING TOOL FOR LATHE MACHINE USING FFT ANALYZER

RESEARCH PAPER CONDITION MONITORING OF SIGLE POINT CUTTING TOOL FOR LATHE MACHINE USING FFT ANALYZER RESEARCH PAPER CONDITION MONITORING OF SIGLE POINT CUTTING TOOL FOR LATHE MACHINE USING FFT ANALYZER Snehatai S. Khandait 1 and Prof.Dr.A.V.Vanalkar 2 1 P.G.Student,Department of mechanical KDK College

More information