Simulation of PWM CSI induction motor drive system

A general and efficient simulation program for switched-mode power electronic circuit analysis is introduced, and several of its salient features are discussed. It uses a nodal approach which is efficient in handling circuit topology changes and in simulating feedback control circuits. Control strategies such as a PWM (pulse-width modulated) generator or a zero-crossing detector can be easily implemented. It also allows variable time steps, which is useful in long-time simulation study. By using this program, the steady-state and dynamic performances of a PWM CSI (current source inverter) induction motor drive system with a special control strategy are simulated. Simulation results are experimentally verified.<>