Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (5): 38-42.

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Analyses of Harmonic Torque and Circular Current in the Stator Winding of Brushless Doubly-Fed Machines

Yang Xiang-yu  Yang Jin   

  1. College of Electric Power,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-07-02 Online:2005-05-25 Published:2005-05-25
  • Contact: 杨向宇(1963-)，男，教授，博士生导师，主要从事电力传动控制系统方面的研究 E-mail:yangxyu@scut.edu.cn
  • About author:杨向宇(1963-)，男，教授，博士生导师，主要从事电力传动控制系统方面的研究
  • Supported by:

    广东省自然科学基金资助项目(313847)

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Abstract:

A harmonic equivalent circuit of BDFM (Brushless Double-Fed Machine)is proposed based on the arialysis of the magnetic field distribution of BDFM and the analysis of the harmonic magnetic filed reciprocity among the stator power winding,the stator control winding and the rotor winding.The creation of the harmonic torque and its influence on the operation performance of BDFM ale then analyzed.Moreover,the induction voltage in the stator
windings resulting from the harmonic magnetic field of the induction current in the rotor winding is analyzed,and the reason for creating the circular curent in a parallel branch of stator windings are presented,thus a theoretical foundation for the design and harmonic analysis of BDLM being laid.

Key words: harmonic magn etic field, brushless double-fed machine, operation performance, harmonic torque, circular curent