Performance of Random PWM Techniques for Induction Motor Drive
S. Nithya Lavanya1, T. Bramhananda Reddy2, M. Vijay Kumar3
1S.Nithya Lavanya, Research Scholar, JNTUA, Ananthapuramu (Andhra Pradesh), India.
2T.Bramhananda Reddy, Department of EEE, G. Pulla Reddy Engineering Collège, Kurnool (Andhra Pradesh), India.
3M.Vijay Kumar, Department of EEE, JNTUA, Anantapur (Andhra Pradesh), India.
Manuscript received on 10 January 2019 | Revised Manuscript received on 20 January 2019 | Manuscript Published on 30 January 2019 | PP: 133-139 | Volume-8 Issue-2S2, January 2019 | Retrieval Number: B10290182S219/19©BEIESP
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Abstract: Conventional PWM techniques generate high magnitude of harmonics at and around harmonic of switching frequencies. This high magnitude of harmonics causes acoustic noise, vibration and electromagnetic interference to the nearby systems. In this paper different types of variable and constant switching frequency random PWM techniques were discussed to reduce the magnitude of harmonics at multiples of switching frequencies. In variable switching frequency random PWM techniques, frequencies are varied in a limited range (±500 Hz) hence filter design also becomes easy. The performance evaluation of these random PWM techniques is carried out in MATLAB/ Simulink without filter circuit between inverter and induction motor.
Keywords: Constant Switching Frequency, Pulse Width Modulation (PWM), Random PWM, Variable Switching Frequency.
Scope of the Article: Performance Evaluation of Networks