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Sensorless Speed Control of Induction Motor using Model Reference Adaptive Control and Direct Torque Control System

모델기준적응제어 및 직접토크제어 시스템을 이용한 유도전동기의 센서리스 속도제어

  • 김성환 (한국해양대학교 기관시스템공학부) ;
  • 정범동 (한국해양수산연수원) ;
  • 윤두오 ((주)삼성중공업) ;
  • 이성근 (한국해양대학교 전기전자공학부) ;
  • 오세진 (한국해양대학교 운항훈련원)
  • Received : 2012.06.29
  • Accepted : 2012.09.11
  • Published : 2012.12.31

Abstract

This paper proposes a new sensorless speed control scheme of induction motor using Model Reference Adaptive Control and Direct Torque Control System. The Model Reference Adaptive Control System is based on the comparison between the outputs of Reference Model and Adjustable Model. The error between the estimated quantities obtained by the two models is used to drive a suitable adaptation mechanism which generates the estimated rotor speed for the Adjustable Model. And the Direct Torque Control scheme controls torque and flux by restricting the flux and torque errors within respective hysteresis bands, and motor torque and flux are controlled by the stator voltage space vector using optimum inverter switching table. The simulation results of proposed method indicate good speed responses from the low speed range to the high, and also show favorable characteristics of load operation.

본 논문은 모델기준적응제어 및 직접토크제어 방식을 이용한 새로운 유도전동기의 센서리스 속도제어 방법을 제안한다. 모델기준적응제어는 기준모델과 조정모델을 설정하고 이들의 출력을 비교하여 조정모델 및 제어를 위한 속도 추정값을 얻는 제어법이다. 그리고 직접토크제어는 토크와 자속을 독립적으로 제어하는 방법으로 토크, 자속 지령치와 전동기 고정자 전압, 전류 값을 이용해 추정한 토크, 자속을 비교하여 히스테리시스 밴드를 거쳐 그 오차를 가장 최소화하기 위한 전압벡터를 선정하여 출력하는 방법이다. 본 논문에서는 제안한 방식의 이론적인 배경 및 타당성에 대해 기술하였으며 모의실험을 통해 제안된 방식의 우수성을 검증하였다.

Keywords

References

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