Discontinuous Random Space Vector Modulation for Electric Drives: A Digital Approach

Space vector modulation (SVM), with its many advantages over classical pulsewidth modulation technique (PWM), is gaining in popularity. However, only deterministic SVM exists. Randomized PWM (RPWM) with its cleaner harmonic spectrum is gaining interest for industrial applications required to meet electromagnetic compatibility standards. Inverter switching losses are optimized and life expectancy can be increased using a suitable discontinuous modulation technique. Here, we present, a discontinuous and randomized-modulation technique based on space vector calculation, intended for electric-drive oriented hybrid electric vehicle, which has the advantages of SVM and clean harmonic-spectrum and the efficiency of RPWM and DPWM, respectively.