Control of PWM voltage inverters in the pulse dropping region

This article explores in detail the operation of PWM inverters in the pulse dropping or overmodulation region. A discussion of the improvement obtained from the compensated modulation technique (CMT) method when compared to the previous approximate approach demonstrates an improvement in accuracy. A review of space vector overmodulation techniques reveals the similarities and differences with sine wave overmodulation. Finally, simulation and experimental results demonstrate the CMT´s accuracy and controlled transition throughout the operating regions of V/Hz and current regulated PWM inverters