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

The Korean Institute of Electrical Engineers (대한전기학회)
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An Instrument Fault Diagnosis Scheme for Direct Torque Controlled Induction Motor Driven Servo Systems

직접토크제어 유도전동기 구동 서보시스템을 위한 장치고장 진단 기법

  • 이기상 (단국대학교 전기전자컴퓨터공학부) ;
  • 유지수 (단국대학교 전기전자컴퓨터공학부)
  • Published : 2002.06.01
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Abstract

The effect of sensor faults in direct torque control(DTC) based induction motor drives is analyzed and a new Instrument fault detection isolation scheme(IFDIS) is proposed. The proposed IFDIS, which operated in real-time, detects and isolates the incipient fault(s) of speed sensor and current sensors that provide the feedback information. The scheme consists of an adaptive gain scheduling observer as a residual generator and a special sequential test logic unit. The observer provides not only the estimate of stator flux, a key variable in DTC system, but also the estimates of stator current and rotor speed that are useful for fault detection. With the test logic, the IFDIS has the functionality of fault isolation that only multiple estimator based IFDIS schemes can have. Simulation results for various type of sensor faults show the detection and isolation performance of the IFDIS and the applicability of this scheme to fault tolerant control system design.

Keywords

References

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