다중모델 적응제어기법을 이용한 동기전동기의 전류제어기 설계

초록

This paper presents the modeling of a vector controlled PMSM drive system and design of direct digital controller for current control based on the multiple model adaptive control(MMAC) method. PMSM requires robustness of performances against the variation of the load or disturbance. In this paper, such behaviors are described as a set of multiple models. Each model is identified at a current and a load by using the closed loop identification algorithm. Individual digital current controller for each plant model is directly redesigned using the discrete-time characteristic ratio assignment (DCRA) so that it satisfies the given time response specifications. The experimental set up consists of PMSM (5 Kw, 220V) equipped with a flywheel load of 220Kg, As a result, it is shown that all the performances coincide closely with those of simulation.