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In this paper, two common-mode voltage (CMV) reduction methods are proposed for the three-to-five-phase indirect matrix converter. The effectiveness of the proposed CMV reduction methods is due to the reconfiguration of the zero vectors from the inversion stage to the rectification stage in modulation schemes. In theory, the proposed methods not only reduce the peak value of the CMV by up to 27.9% but also improve the differential-mode performance of the output voltage, thus benefiting the electromagnetic interference design. Moreover, the voltage transfer ratio, the spectrum of the resultant CMV, and the total harmonic distortions of the current and voltage are analyzed in this paper, where, thus, the pros and cons of the proposed modulation schemes are presented. Simulations and experimental tests are provided to verify the effectiveness of the proposed methods.

In order to reduce the Common-Mode Voltage (CMV) in three-to-five phase indirect matrix converters, three improved Space Vector Pulse Width Modulation (SVPWM) methods are proposed and discussed. The improved modulation schemes are achieved by reorganizing zero vectors from the inversion stage to the rectification stage. The proposed methods can not only theoretically reduce the CMV peak value by up to 47.1%, but also decrease the switching losses of the power devices. Moreover, comparisons show that a superior CMV reduction performance is achieved when only two large active voltage vectors (AVVs) in the inversion stage, which results in a large amount of third-order harmonics in output currents. In addition, the method that utilizes two adjacent active current vectors (ACVs) and the method that uses two non-adjacent ACVs in the rectification stage have the same CMV peak value. By contrast, the latter achieves a lower Total Harmonic Distortion (THD) level of the output currents. Simulation results verify the effectiveness of the proposed methods.