Vector Control of AC Motor Using PWM Inverter with Output LC Filter

Abstract

This paper proposes a novel high performance vector control system of AC motors using a low switching frequency (2kHz) PWM voltage source inverter with an output LC filter. Excellent high speed response characteristics of the LC filter output voltage have been realized using a novel deadbeat control algorithm. Experimental results have shown that the response of the current controller is similar to the response without the LC filter. In addition, it has been confirmed by simulation that errors of the LC filter constants within ±10% can be permitted.