Digital Simulation of a High-Performance AC Drive System---Part II

This is the second part of a paper describing the digital simulation of an ac drive system consisting of a three-phase induction motor supplied by a cycloconverter. In Part I, it is assumed that the cycloconverter is connected to a three-phase sinusoidal power source having negligible impedance. In this part, the complete system is simulated, including a three-phase synchronous generator, which in a practical system is driven by a prime mover at constant speed. To simplify the simulation process, it is assumed that the commutation of the generator phase currents takes place instantaneously. The results of the simulation are compared with test results. Both the calculated rms values and waveshapes of voltage and current show good agreement with test data.