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http://dx.doi.org/10.6113/JPE.2011.11.1.021

Multilevel Inverter to Reduce Common Mode Voltage in AC Motor Drives Using SPWM Technique  

Renge, Mohan M. (Dept. of Electrical Eng., Shri Ramdeobaba Kamla Nehru Engineering College)
Suryawanshi, Hiralal M. (Dept. of Electrical Eng., Visvesvaraya National institute of Technology)
Publication Information
Journal of Power Electronics / v.11, no.1, 2011 , pp. 21-27 More about this Journal
Abstract
In this paper, an approach to reduce common-mode voltage (CMV) at the output of multilevel inverters using a phase opposition disposed (POD) sinusoidal pulse width modulation (SPWM) technique is proposed. The SPWM technique does not require computations therefore, this technique is easy to implement on-line in digital controllers. A good tradeoff between the quality of the output voltage and the magnitude of the CMV is achieved in this paper. This paper realizes the implementation of a POD-SPWM technique to reduce CMV using a five-level diode clamped inverter for a three phase induction motor. Experimental and simulation results demonstrate the feasibility of the proposed technique.
Keywords
Common-mode voltage; Medium voltage drives; Multilevel inverter; Sinusoidal pulse width modulation;
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