|
|
|
| The Starting Performance Study of a Brushless Doubly-Fed Machine Based on the Multi-Harmonics Starting Method |
| Kan Chaohao, Hu Yang, Ren Taian, Bao Xichang, Chu Chenglong |
| College of Electrical & Automatic Engineering Hefei University of Technology Hefei 230009 China |
|
|
|
|
Abstract In order to overcome the shortcoming of small starting torque and large starting current of brushless doubly-fed machine(BDFM), a novel BDFM designed based on the multi-harmonics starting method is proposed in this paper. For the modified motor, when it starting, the magnetomotive forces(MMFs) of stator windings can be decomposed into multiple components rotating in the same direction, corresponded to different pole pair numbers. The loop currents of the rotor windings that adopted “composite coil group” have different flow paths according to different harmonic fields except the path under the fundamental field, which is the same with that of conventional BDFM. When the motor is starting, the referred value of rotor resistance increased while the value of the leakage impedance remained unchanged. As a result, the combined design of the stator and rotor has efficiently improved the starting power factor, reduced the starting current and increased the starting torque. However, when the motor is running, the stator windings generate the fundamental field independently that the disruption of the higher harmonics were avoided. This paper describes the principle of the multi-harmonic combined starting method of BDFM and the detailed winding design, and the equivalent circuit of the starting condition and the electromagnetic torque calculation are illustrated. A prototype is manufactured to verify the design, the motor YZR132 is a fabricated reference. The starting currents of different operation conditions are tested when the winding adopted the multi-harmonic combined starting method and asynchronous starting method, respectively. Both the no-load and different load situations are considered. The magnetic fields in different conditions are compared and analyzed. The test results show that the wound rotor BDFM designed by multi-harmonic starting method has good starting performance.
|
|
Received: 17 September 2018
Published: 11 December 2019
|
|
|
|
|
|
[1] Willamson S, Ferreira A C.Generalized theory of the brushless doubly-fed machine. Part2: model verification and performance[J]. IEE Proceedings on Electric Power Applications, 1997, 144(2):123-129.
[2] McMahon R A, Roberts P C, Wang X, et al. Performance of BDFM as generator and motor[J]. IEEE Proceedings—Electric Power Applications, 2006, 153(2): 289-299.
[3] 邓先明, 姜建国, 方荣惠. 笼型转子无刷双馈电机的电磁分析和等效电路[J]. 电工技术学报, 2005, 20(8): 6-11.
Deng Xianming, Jiang Jianguo, Fang Ronghui.The electromagnetic analysis and equivalent circuit of brushless doubly-fed machine with cage rotor[J]. Transaction of China Electrotechnical Society, 2005, 20(8) : 6-11.
[4] 阚超豪, 王雪帆. 64kW 双正弦结构无刷双馈发电机的设计与测试[J].中国电机工程学报, 2013, 33(33): 115-122.
Kan Chaohao, Wang Xuefan.Design and testing of a 64kW doubly-sine wound rotor brushless doubly-fed induction generator[J]. Proceedings of the CSEE, 2013,33(33):115-122.
[5] Chen Xin, Wang Xuefan, Xiong Fei, et a1. Research on excitation control for stand-alone wound rotor brushless doubly-fed generator system[C]//2013 International Conference on Electrical Machines and Systems, Busan, Korea, 2013, DOI: 10.1109/ICEMS. 2013.6754497.
[6] 程明, 韩鹏, 魏新迟. 无刷双馈风力发电机的设计、分析与控制[J]. 电工技术学报2016, 31(19):38-53.
Cheng Ming, Han Peng, Wei Xinchi.Design, analysis and control of bruslrless doubly-fed generators for wind power application[J]. Transaction of China Electrotechnical Society, 2016, 31(19):38-53.
[7] 张凤阁, 王秀平, 贾广隆, 等. 无刷双馈电机复合转子结构参数的优化设计[J]. 电工技术学报, 2014, 29(1): 77-84.
Zhang Fengge, Wang Xiuping, Jia Guanglong, et al.Optimum design for composite rotor structural parameters of brushless doubly-fed machines[J]. Transactions of China Electrotechnical Society, 2014, 29(1): 77-84.
[8] 韩力, 罗杰, 李景灿, 等. 无刷双馈电机稳定性分析及其影响因素探讨[J]. 电机与控制学报2013, 17(7): 105-112.
Han Li, Luo Jie, Li Jingcan, et al.Stability analysis and its influence factors study of brushless doubly—fed machine, electric machine and control[J]. Electric Machines and Control , 2013, 17(7): 105-112.
[9] 熊飞, 王雪帆, 程源. 不等匝线圈转子结构的无刷双馈电机研究[J]. 中国电机工程学报, 2012, 32(36): 82-88.
Xiong Fei, Wang Xuefan, Cheng Yuan.Studies of brushless doubly-fed machines with an unequal-turn coil rotor structure[J]. Proceedings of the CSEE, 2012, 32(36): 82-88.
[10] 杨顺昌. 无刷双馈电机的电磁设计特点[J]. 中国电机工程学报, 2001, 21(7): 107-110.
Yang Shunchang.Feature of electromagnetic design for brushless doubly-fed machines[J]. Proceedings of the CSEE, 2001, 21(7): 107-110.
[11] 许实章. 新型电机绕组—理论与设计[M]. 北京: 机械工业出版社, 2001.
[12] 许实章. 交流电机的绕组理论[M]. 北京: 机械工业出版社, 1985.
[13] 张凤阁, 王秀平, 于思洋, 等. 不同转子结构无刷双馈电动机转子耦合能力与运行性能的对比分析与实验研究[J]. 中国电机工程学报, 2016, 36(10): 2816-2826.
Zhang Fengge, Wang Xiuping, Yu Siyang, et al.Comparative analysis and experimental research of coupling capability and operating characteristics for brushless doubly-fed motors with different rotor structures[J]. Proceedings of the CSEE, 2016, 36(10): 2816-2826.
[14] Roberts P C, McMahon R A, Tavner P J, et al. Equivalent circuit for the brushless doubly fed machine(BDFM) including parameter estimation and experimental verification[J]. IEE Proceedings-Electric Power Applications, 2005, 152(4): 933-942.
[15] 王爱龙, 熊光煜. 无刷双馈电机电感参数的计算[J].中国电机工程学报, 2009, 29(9): 93-97.
Wang Ailong, Xiong Guangyu.Computation of inductances of the brushless doubly-fed machine[J]. Proceedings of the CSEE, 2009, 29(9): 93-97. |
|
|
|
2019, Vol. 34 
