Analysis and minimization of output current ripple of inverter-fed six-phase AC motors

An analysis method for output current ripple of inverter-fed six-phase AC motors is presented in this paper. Based on the analysis method, this paper investigates the optimal phase displacement when PWM inverter is used. The optimal phase displacement is the one that produce minimum current ripple in the harmonic sets for air gap flux production. Based on the analysis, the optimal phase displacement is 60°. This result is supported by experimental results.

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