Digital Simulation of an Inverter-Fed Self-Controlled Synchronous Motor

This paper describes a digital simulation method for the self-controlled synchronous motor (SCSM) in time domain. A generalized machine model in direct three-phase quantities is used to represent the machine and the fourth-order numerical integration technique of Runge, Kutta, and Gill in [17] is used to solve the machine equations. Performance of the synchronous machine with nonsinusoidal voltages and currents is simulated under both steady-state and transient conditions. The effects of the damper windings and saliency on the torque, and voltage and current waveforms are studied using this digital simulation technique when the machine is operated from a voltage source inverter (VSI) and a current source inverter (CSI).