Control characteristics of digital PI current controller for PM synchronous

영구자석 동기전동기를 위한 디지털 PI 전류제어기의 제어특성

The synchronous PI current controller has been widely used for the high performance PM synchronous drives and generally implemented using a digital signal processor. This paper describes the control characteristics of the digital PI current controller for PM synchronous drives. The stability of the current control system considering the sampling time is investigated and the effects of the mismatched decoupling terms in the discrete-time domain are also discussed. The simulation results are provided to verify the theoretic results.