Abstract
Taking five-phase inverter for example, the relation between the harmonic injecting carrier based PWM and the direct calculating SVPWM for the multi-phase inverter is analyzed. The analysis shows that the SVPWM of multi-phase inverter whose output target line-voltages are sine wave are same with the carrier based PWMs which are injected some harmonic in essence. The target output waveforms and characteristics are equivalent although the realization ways are different entirely. By use of the carrier based PWM method, the equivalent PWM control of five-phase are implemented. Simulation and experiment results show that the carrier based PWM method can keep the control system simple, and keep good performance same with SVPWM at the same time.
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