A coordinated SVPWM without sector identification for dual inverter fed open winding IPMSM system

摘要

A coordinated space vector modulation (SVPWM) algorithm without sector identifications is proposed for the dual inverter fed open winding interior permanent magnet synchronous motor (IPMSM) system, where the duty ratios of the three phases for each inverter are directly calculated, and no trigonometric function calculations or sector identifications are involved. Moreover, the switching frequency for the whole system will be decreased to 1/3 of that of the conventional modulation scheme which employs one SVPWM for each inverter respectively. A new criterion is defined to evaluate the output voltage ripples, and a comparative investigation on the proposed coordinated SVPWM and other two existing modulation algorithms is exhibited. Experimental results verify the effectiveness and superiority of the proposed strategy.