Common-mode voltage reduction method of PWM current source inverter modifying the distribution of zero current vector

The common-mode voltage reduction method of the voltage source inverter has been studied extensively, but the studies for current-source inverter are less than that^[1]. This paper proposes the new space vector PWM methods that can reduce the output common-mode voltage fluctuation of the PWM current source inverter. In the new PWM methods, the current source inverter output two nonzero current vectors and a zero current vector that has the minimum absolute value of common-mode voltage. The proposed method can reduce the amplitude of the common-mode voltage. This paper describes the principle of the proposed methods, the simulation results, and test results of experimental circuit.