The Transactions of the Korean Institute of Electrical Engineers D (대한전기학회논문지:시스템및제어부문D)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis and Detection of Encoder Fault for Vector Controlled Inducton Motor Drives using Power Parity Relations

전력 등가관계를 이용한 벡터제어 유도전동기의 엔코더 고장 해석 및 검출

  • 류지수 (단국대학교 전기전자컴퓨터공학부) ;
  • 이기상 (단국대학교 전기전자컴퓨터공학부) ;
  • 박태건 (충북과학대학 전자정보과)
  • Published : 2003.06.01
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Abstract

In induction motor control systems driven by the indirect vector control scheme, the rotor speed is measured to determine the flux angle which is a key variable in the control algorithm. The most popular way to measure the angular velocity is the use of rotary encoder. Since the errorneous measurement of rotor speed results in incorrect flux angle estimate, the control input generated based on the faulty information should be far from the desired (correct) value and deteriorates the overall control performance. In this paper the effects of encoder fault on motor variables and control performance are analyzed by both theoretical approach and experimental study. A parity equation based on the Power is suggested and applied to detect the incipient fault of encoder.

Keywords

References

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