A SIMPLIFIED INVERTER MODEL FOR ONLINE CONTROL AND SIMULATION

A simplified fundamental component model for sine triangle comparison pulse width modulation (PWM) inverters operating in the transition region is presented. The model is evaluated through experimental verification and by comparing it with detailed simulations of ac motor drives. Results from a real-time control application show that the model compensates for the reduced inverter gain due to bus voltage variation and operation in the pulse dropping region. Finally, a technique for third-harmonic injection in a current-regulated PWM (CRPWM) inverter is demonstrated, providing the incentive to investigate a simplified inverter model that incorporates third-harmonic effects.