Study on Harmonic Suppressing Performance of Random Space Vector PWM in Electric Vehicle

Abstract

The random SVPWM strategy can significantly suppress the clustering harmonic amplitudes of the traditional SVPWM strategy in the driving system of the electric vehicle (EV). Therefore, the principle of the random SVPWM strategy has been detailed. The expression for the signal randomization scheme is given, and then a comprehensive working time expression for the random switching frequency SVPWM, the random zero-vector distribution SVPWM, the random pulse position SVPWM and the hybrid random SVPWM schemes has been derived. An experimental validation has been carried out. The results show that the random SVPWM strategy has excellent performance on suppressing the harmonic amplitudes of the current and the electromagnetic torque.