Multilevel PWM Waveform Decomposition and Phase-Shifted Carrier Technique

Multilevel pwm waveforms can be decomposed into several multilevel pwmcomponents. phase-shifted carrier (psc) is an efficient decomposition technique. in thispaper, we have first demonstrated the equality of psc and alternative phase oppositiondisposition techniques. second, we have modified psc to accommodate other dispositiontechniques. third, we have investigated the effects of using asymmetrical carriers on thespectrum of the resulting pwm waveform. fourth, we have proposed a logical algorithmfor decomposing all types of multilevel pwm waveforms.