A New Modulation Strategy to Reduce Common-Mode Current of Indirect Matrix Converter

Abstract

This letter presents a new space vector modulation strategy adopting new zero vectors to achieve common-mode current (CMC) reduction for indirect matrix converter (IMC). By substituting conventional zero vectors by new zero vectors, the impedance of common-mode loop increases, which contributes to CMC reduction. Thus, the IMC system with the proposed method alleviates the adverse effects of CMC for ac drives. Moreover, additional hardware and complex commutation process are not required. Experiments are conducted to verify the effectiveness of the proposed method.