Passive Common-Noise Canceller Placed on the Inverter DC-Side

This study reports on the common-mode (CM) voltage suppression of a passive common-noise canceller (PCC), which can cancel CM noise generated by pulse-width-modulation (PWM) inverters. The proposed PCC is characterized by the installation position to the DC side of an inverter instead of the AC side. Compared to a conventional AC-side PCC, the proposed PCC can reduce the window area of the CM transformer to enable size and weight reduction of the PCC. This study describes the design of the PCC and shows the experimental CM voltage suppression effect with a voltage-source PWM inverter.