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Nonsingular terminal sliding-mode observer design for interior permanant magnet synchronous motor drive at very low-speed

Yuan Lei Shen Jian-Qing Xiao Fei Chen Ming-Liang

Nonsingular terminal sliding-mode observer design for interior permanant magnet synchronous motor drive at very low-speed

Yuan Lei, Shen Jian-Qing, Xiao Fei, Chen Ming-Liang
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  • Abstract views:  1710
  • PDF Downloads:  817
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Publishing process
  • Received Date:  22 July 2012
  • Accepted Date:  30 August 2012
  • Published Online:  05 February 2013

Nonsingular terminal sliding-mode observer design for interior permanant magnet synchronous motor drive at very low-speed

  • 1. National Key Laboratory of Vessel Integrated Power System Technology, Naval University of Engineering, Wuhan 430033, China
Fund Project:  Project supported by the National Basic Research Program of China (Grant No. 2012CB215103), the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 50721063).

Abstract: A nonsingular high-order terminal sliding-mode observer of interior permanent magnet synchronous motor (IPMSM) is presented, of which the state variable is the current of rotor-oriented d-q reference frame, to obtain the accurate information about angular speed and rotor position for high-performance vector control system. A nonsingular terminal sliding-mode observer is used to improve dynamic response of the observer speed and robustness of the current observer, and the high-order sliding mode method is adopted to estimate the chattering phenomenon of the conventional sliding-mode. Meanwhile, to obtain the regulator parameters of speed and current loop, an integral-feedback method of estimating the rotor speed is adopted, and the inner current loop is realized using a decoupling and diagonal internal model control algorithm. Experimental results of 2 MW PMSM drive system show that the proposed method can accurately estimate the position and speed of the rotor, and the system has good dynamic and static performances.

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