Development of a Sensorless Drive for Brushless DC Motor

브러시리스 직류 전동기용 센서리스 드라이브 개발에 관한 연구

  • 여형기 (고려대학교 전기공학과) ;
  • 이광운 (고려대학교 전기공학과) ;
  • 박정배 (고려대학교 전기공학과) ;
  • 김태형 (고려대학교 전기공학과) ;
  • 황건 (연변대학교(중국) 이공학원 전자공학계) ;
  • 유지윤 (고려대학교 전기공학과)
  • Published : 1997.07.21

Abstract

This paper describes a indirect sensing method for the rotor flux position of interior permanent magnet (IPM) brushless DC motors. The phase inductance of an IPM motor varies appreciably according to the rotor position. The waveform characteristics of the terminal voltage of IPM brushless DC motors is analysed and a simple and practical method for indirect sensing of the rotor position is proposed. A compact sensorless drive is implemented and tested using a 87c196mc 16-bit microcomputer. The experimental results show the validity of the proposed method and the drive works well from 500 to 7,200rpm.

Keywords