A Position Sensorless Motion Control System of Reluctance Synchronous Motor with Direct Torque Control

직접토크제어에 의한 위치센서 없는 리럭턴스 동기전동기의 위치제어 시스템

  • 김민회 (영남이공대학 전기자동화과) ;
  • 이복용 (동서울대학 전기정보제어과) ;
  • 김경식 (경북전문대학 전기과)
  • Published : 2002.06.30

Abstract

This paper presents an implementation of high-dynamic performance of position sensorless motion control system of Reluctance Synchronous Motor(RSM) drives for an industrial servo system with direct torque control(DTC), The problems of DTC for high-dynamic performance and maximum efficiency RSM drive due to a saturated stator linkage flux and nonlinear inductance curve with various load currents, The accurate estimation of the stator flux and torque are obtained using stator flux observer of which a saturated inductance Ld and Lq can be compensated by adapting from measurable the modulus and angle of the stator current space vector. To obtain fast torque response and maximum torque/current with varying load current, the reference command flux is ensured by imposing Ids=Iqs. This control strategy is proposed to fast response and optimal efficiency for RSM drive. In order to prove rightness of the suggested control algorithm, the actual experiment carried out at ${\pm}$20 and ${\pm}$1500 rpm. The developed digitally high-performance control system are shown some good response characteristic of control results and high performance features using 1.0kW RSM of which has 2.57 Ld/Lq salient ratio.

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