Performance Evaluation of Induction Motor for Unipolar and Bipolar Pulse Width Modulation Techniques
T. Murali Krishna1, K. Krishna Veni2, G. Suresh Babu3, D. Sushma4, C. Harish5
1T. Murali Krishna, Department of Electrical and Electronics Engineering, CBIT, Hyderabad, India.
2K. Krishna Veni, Department of Electrical and Electronics Engineering, CBIT, Hyderabad, India.
3D. Sushma, Department of Electrical and Electronics Engineering, CBIT, Hyderabad, India.
4G. Suresh Babu, Department of Electrical and Electronics Engineering, CBIT, Hyderabad, India.
5C. Harish, Department of Electrical and Electronics Engineering, CBIT, Hyderabad, India.
Manuscript received on 10 August 2019 | Revised Manuscript received on 16 August 2019 | Manuscript published on 30 August 2019 | PP: 3626-3629 | Volume-8 Issue-10, August 2019 | Retrieval Number: J97930881019/19©BEIESP | DOI: 10.35940/ijitee.J9793.0881019
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Abstract: Inverter is an interface device between a dc source and ac loads which converts DC voltage to a variable voltage, variable frequency AC voltage. While converting, it introduces harmonics in the output of the system which results in additional heating of induction motors. Hence in order to diminish these harmonics, different techniques are introduced viz. external and internal control techniques in which the latter is more efficient. Out of all proposed methods, the internal control of inverter which is also called as Pulse Width Modulation (PWM) can be achieved either using unipolar modulation technique or bipolar modulation technique. In this paper, the control circuitry to model unipolar and bipolar modulation methods is simulated and their performance is checked on an induction motor and compared in MATLAB Simulink environment.
Keywords: Unipolar Modulation, Bipolar Modulation, Induction Motor, Total Harmonic Distortion, Lower Order Harmonics.
Scope of the Article: Performance Evaluation of Networks