표면부착형 영구 자석 전동기를 이용한 전동기 구동 파워 스티어링 제어 시스템의 개발

This paper describes a development of MDPS control system using Surface mounted Permanent Magnet Synchronous Motor (SPMSM). The control system is composed of MDPS logic to improve vehicle dynamics characteristics and motor torque controller to track torque reference precisely. A DC link current sensing and reconstruction algorithm is also included to attain cost down in the control system. The validity of the developed control system is verified by experiments in laboratory and a 2,200㏄ level Sports Utility Vehicle (SUV) under various driving conditions.