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Torque Closed-loop Vector Control Based on Extended Flux Linkage Observer of Permanent Magnet Synchronous Motor
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Affiliation:

(1. School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China; 2. Sungrow Power Supply Co. Ltd., Hefei 230088, China)

Abstract:

The permanent magnet synchronous motor (PMSM) used in wind turbine and electric vehicle situations usually has to directly track the torque command issued by the main control system. As a matter of fact, however, no torque test components such as a torque sensor is available in an actual system. So the exact acquisition of the observed torque is of utmost importance for the torque control system. To enhance the torque observer performance, this paper proposes a real-time stator flux linkage observation method based on a minimum extended flux linkage observer, through which the stator flux linkage and the electrical torque are calculated. The proposed stator flux linkage observer is not only free from the flaws of the traditional pure integral strategy, such as saturation, phase shift, amplitude deviation, and so on, but also, as a pure integral strategy, is robust for parameter deviation, namely, the precision of the observed torque is basically unaffected by the direct- and quadrature- axis inductance and the rotor flux linkage. Simulations and experiments on an 11 kW PMSM have validated the performance of the proposed method.

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Get Citation
[1]YANG Shuying, ZHAN Qi, ZHANG Xing, et al. Torque Closed-loop Vector Control Based on Extended Flux Linkage Observer of Permanent Magnet Synchronous Motor[J]. Automation of Electric Power Systems,2014,38(6):80-84. DOI:10.7500/AEPS20130622006
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History
  • Received:June 22,2013
  • Revised:February 19,2014
  • Adopted:August 22,2013
  • Online: October 31,2013
  • Published: