영구자석 동기모터의 파라미터 식별방법을 사용한 제어기 자동 이득 산정에 관한 연구

Abstract

Generally a high performance permanent magnet synchronous machine (PMSM) drive system is consisted of cascaded structure which has current, speed and position control loop. In the part of precision control, controller gains of each proportional integral controllers are determines accuracy of PMSM drive system. Methods for determining the controller gain values can be divided in two ways. One is manual controller gain values tuning using Routh-Hurwitz criterion and the other is auto tuning method based on parameter identification values. This paper discusses an automatic gain tuning method of PI controller for PMSM drive system using parameter identification. Since the auto tuning algorithm uses identified parameter values in the tuning of the controller, the correct parameter identification of the system should be preceded. The proposed method used electrical and mechanical excitation signals for identify parameters, and the controller tuning algorithm is implemented by using the pole zero cancellation method. As a result reduction of electrical, mechanical parameter estimation error and fast system response with no overshoot are shown.