A Study of Using Optimal Hysteresis Band Amplitude for Direct Torque Control of Induction Motor

유도전동기 직접토크제어의 히스테리시스 밴드 크기의 최적화에 관한 연구

  • Jeong B.H. (Dept. of Electric Eng. Chosun Univ.) ;
  • Kim S.K. (Dept. of Electric Eng. Chosun Univ.) ;
  • Park J.K. (Dept. of Electric Eng. Chosun Univ.) ;
  • Oh G.K. (Dept. of Electric Eng. Chosun Univ.) ;
  • Cho G.B. (Dept. of Electric Eng. Chosun Univ.) ;
  • Baek H.L. (Dept. of Electric Eng. Chosun Univ.)
  • 정병호 (조선대학교 전기공학과) ;
  • 김성결 (조선대학교 전기공학과) ;
  • 박정국 (조선대학교 전기공학과) ;
  • 오금곤 (조선대학교 전기공학과) ;
  • 조금배 (조선대학교 전기공학과) ;
  • 백형래 (조선대학교 전기공학과)
  • Published : 2003.07.01

Abstract

Most of all, DTC drive is very simple in its implementation because it needs only two hysteresis comparator and switching vector table for both flux and torque control. The switching strategy of a conventional direct torque control scheme which is based on hysteresis comparator results in a variable switching frequency which depends on the speed, flux, stator voltage and the hysteresis of the comparator. The amplitude of hysteresis band greatly influences on the drive performance such as flux and torque ripple and inverter switching frequency. In this paper the influence of the amplitudes of flux and torque hysteresis bands and sampling time of control program on the torque and flux ripples are investigated. Simulation results confirm the superiority of the DTC under the proposed method over the conventional DTC.

Keywords