A new suboptimal pulse-width modulation technique for per-phase modulation and space vector modulation

A new suboptimal pulse-width modulation (PWM) technique for power converter applications is presented in this paper. The technique is developed by considering both two-phase and three-phase modulation techniques. In comparison with the existing suboptimal PWM techniques, the new suboptimal technique provides online calculation, extension of maximum linear modulation index, and can be applied to both per-phase modulation and space vector modulation. For high switching frequency applications or low switching frequency applications with modulation index above a particular range, the new technique increases the frequency of the first dominant harmonic by 50% and minimises switching losses. Experimental and simulation results will be presented to confirm the theoretical analysis.