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›› 2005, Vol. 22 ›› Issue (4): 488-493.DOI: 10.7523/j.issn.2095-6134.2005.4.014

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The MRAS Flux Observer with Stator Voltage Error Compensator

CHEN Gui-Lan1, WEN Xu-Hui1, ZHANG Li-Wei2   

  1. 1 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100080, China;
    2 Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2004-06-25 Revised:2004-10-14 Online:2005-07-15

Abstract:

When the induction motor system is driven by the voltage inverter, the MRAS (Model ReferenceAdaptive System) flux observer can be used to observe flux. In such cases, the reference value of the stator voltage, not the practical value, is used, which will cause amplitude error and DC offset, and affect the stability of low speed directly. This paper presents a new compensat ion method for stator voltage amplitude and DC offset, which can improve the performance of the speed sensor-less vector control of induction motor. The validity of the proposed method is also verif ied by simulation.

Key words: MRAS, induct ion motor, speed sensor-less vector control, stator voltage error

CLC Number: