Linear PWM Techniques of Asymmetrical Six-Phase Machine With Optimal Current Ripple Performance

Linear modulation techniques (LMTs) of an asymmetrical six-phase machine (ASPM) with two isolated neutral points synthesize the desired voltage vectors by applying at least five switching states. Different choices applied vectors, sequences in which they are used, distribution dwell-times among redundant states give rise to a large number possible LMTs. It is desirable that these LMTs avoid more than transitions particular inverter leg within carrier period. Only subset existing ASPM follows this rule. Through innovative approach, article finds way account for all infinitely many follow rule most per leg. Another important criterion selection LMT its current-ripple performance. Therefore, through numerical optimization, optimal above infinite reference linear range and whole feasible parameter. This parameter related leakage inductance impacts current ripple performance ASPM. An hybrid strategy proposed techniques, outperforms terms ripple. The theoretical analysis validated simulation MATLAB experiments performed up 3.5 kW on hardware prototype.