Journal of international Conference on Electrical Machines and Systems

  • 제1권3호
  • /
  • Pages.330-335
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  • 2012
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  • 2234-6902(pISSN)
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  • 2234-7577(eISSN)
대한전기학회 분과 (Journal of International Conference on Electrical Machines and Systems)
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A New Method to Estimate the Magnetic Field Modulation Effect of Brushless Doubly-Fed Machine with Cage Rotor

  • Liu, Hanghang (Shandong Dongying Power Supply Company) ;
  • Han, Li (State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University) ;
  • Gao, Qiang (Zhejiang Taizhou Power Supply Company)
  • 투고 : 2012.05.24
  • 심사 : 2012.08.02
  • 발행 : 2012.09.01
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초록

Brushless doubly-fed machine (BDFM) doesn't use brush and slip ring, and has advantages such as high system reliability, small capacity of its frequency converter, low system cost, adjustable power factor and speed, etc. At the same time, it has good applicable potentials on the variable frequency motors and the variable speed constant frequency generators. However, due to the complicacy and particularity of BDFM in the structure and operating mechanism, the effect of magnetic field modulation directly influences the operating efficiency of BDFM. To study the effect of different cage rotor structures on the magnetic field modulation of BDFM, the rotor magnetomotive force (MMF) of BDFM with cage rotor is studied by the analytical method. The components and features of rotor harmonic MMFs are discussed. At the same time, the method to weaken the higher harmonics is analyzed by the theoretic formulae. Furthermore, the magnetic field modulation mechanism is expounded on in detail and the relationship between the magnetic field modulation effect and the operating efficiency of BDFM is established. And then, a new method for estimating the magnetic field modulation effect is proposed. At last, the magnetic field modulation effects of four BDFM prototypes with different cage rotor structures are compared by the MMF analysis and the efficiency data of electromagnetic design. The results verify the effectiveness of the new method for estimating the magnetic field modulation effect of BDFM with cage rotor.

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참고문헌

  1. McMahon Richard A., Wan Xiaoyan, Abdi-Jalebi Eshan, Tavner Peter J., Roberts Paul C., Jagiela Mariusz, "The BDFM as a Generator in Wind Turbines," 12th International Power Electronics and Motion Control Conference, Portoroz, Aug. 30-Sept. 1 2006, pp. 1859-1865.
  2. McMahon R. A., Roberts P. C., Wang X., Tavner P. J., "Performance of BDFM as Generator and Motor," IEEE Proceedings-Electric Power Applications, vol. 153, no. 2, pp. 289-299, Mar. 2006. https://doi.org/10.1049/ip-epa:20050289
  3. Qiang Gao, Li Han, Ci-yong Luo, Ren-jie Ye, "Cage Rotor Structure and Its Effect on Magnetic Field Modulation of Brushless Doubly-Fed Machine," Proceedings of the 11th International Conference on Electrical Machines and Systems, Oct. 17-20 2008, pp. 4234-4239.
  4. Fengge Zhang, Guangjian Pan, Fengxiang Wang, Ming Lin, "Study on Design of Brushless Doubly-Fed Machine with a New Type Rotor," IEEE International Conference on Industrial Technology, Feb. 2009, pp. 1-3.
  5. Fengge Zhang, Yongxin Li, Xiuping Wang, "The Design and FEA of Brushless Doubly-fed Machine with Hybrid Rotor," Proceedings of 2009 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, Sept. 25-27 2009, pp. 324-327.
  6. Feng-xiang Wang, Feng-ge Zhang, "Brushless Doubly-Fed AC Machine with Magnetic Field Modulation Type," Changchun: Jilin University Press, 2004, pp. 18-23.
  7. Xian-ming Deng, Rong-hui Fang, etc. et al., "Finite Element Analysis of Brushless Doubly-fed Machine with Equidistant Cage Rotor," Electric Machines and Control, vol. 13, no. 4, pp. 507-510, 522, Jul. 2009.