Switching Control Method for Voltage-Source PWM Inverters to Eliminate Conduction Noise between Phases

Abstract

This paper proposes a technique for reducing the leakage current that flows into a power source as conductive noise. The proposed method eliminates the leakage current between two phases by increasing one phase voltage and decreasing the other phase voltage in a synchronous manner. Through simulation and experiment, it was confirmed that the proposed method reduces the noise by 9dB in the low-frequency band, where the influence of the size of the noise filter is significant.