Dpwm-Controlled Indirect Matrix Converter To Suppress Common-Mode Voltage

Indirect matrix converter (IMC) is consisted of both rectifier and inverter stages in cascaded connection with no decoupling capacitor. The rectifier stage must commutate when the inverter stage is at zero-current condition (ZCC) in the conventional modulation. This paper proposes a fixed-slope carrier based discontinuous pulse width modulation (DPWM) for the inverter stage in order to reduce generated common-mode voltage (CMV). Since the proposed DPWM does not use any zero-voltage switching state in the switching patterns, a four-step voltage-based commutation is realized in the rectifier stage. Simulation results are presented to validate the proposed method.