Power loss minimization of common-mode noise reduced single-phase inverter by power device combination

This paper proposes a new power device combination that can reduce total power loss for a single-phase inverter reduced common-mode noise. In the proposed common mode voltage reduction PWM, to reduce the common-mode voltage of a single-phase inverter, the half bridge connected to the live end of the single-phase commetial power source perform PWM, and the other half bridge connected to the neutral end commutates with the 60Hz line frequency. To reduce power loss of the proposed PWM method, the half bridge connected to the neutral end uses the IGBT, which has a low conduction loss comparing to the MOSFET. The other half bridge connected to the live end, thereby operating with a fast switching frequency, uses the MOSFET, which has low switching loss compariong to the IGBT. The effectiveness of the proposed circuit is proved by simulation.