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Article

Research of the Fundamental Wave of Wound-Rotor Brushless Doubly-Fed Machine

1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, China
2
East Group Co., Ltd., Dongguan 523808, Guangdong Province, China
3
Electric Power Research Institute of State Grid Hunan Electrical Power Corporation, Changsha 410007, Hunan Province, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(6), 1172; https://doi.org/10.3390/en12061172
Received: 22 January 2019 / Revised: 17 March 2019 / Accepted: 21 March 2019 / Published: 26 March 2019
(This article belongs to the Special Issue Electrical Engineering for Sustainable and Renewable Energy)
The brushless doubly-fed machine (BDFM) is a special type of machine with two sets of stator windings and one set of rotor winding. The magnetic field of the BDFM is considered to be complex with no regularity. To study the principles of magnetic fields for the BDFM, a general expression of the fundamental wave is deduced, which shows that the fundamental wave can be regarded as a standing wave when it is observed from rotor reference; also, some discussions about the characteristics of the fundamental wave are presented in the paper. Next, a model of wound-rotor BDFM prototype is established, and the enveloping line and the relations between rotor position and its electrical angle of the magnetic field are figured out in the paper. Finally, after detecting the induced electromotive force (EMF) of measurement coils embedded in the corresponding prototype machine, the validity of the proposed conclusions is verified. View Full-Text
Keywords: wound-rotor brushless doubly-fed machine; air-gap magnetic field; measurement coil; standing wave; stationary point switch wound-rotor brushless doubly-fed machine; air-gap magnetic field; measurement coil; standing wave; stationary point switch
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MDPI and ACS Style

Li, Z.; Wang, X.; Ou, L.; Gao, X.; Xiong, F. Research of the Fundamental Wave of Wound-Rotor Brushless Doubly-Fed Machine. Energies 2019, 12, 1172. https://doi.org/10.3390/en12061172

AMA Style

Li Z, Wang X, Ou L, Gao X, Xiong F. Research of the Fundamental Wave of Wound-Rotor Brushless Doubly-Fed Machine. Energies. 2019; 12(6):1172. https://doi.org/10.3390/en12061172

Chicago/Turabian Style

Li, Zhenming, Xuefan Wang, Lezhi Ou, Xinmai Gao, and Fei Xiong. 2019. "Research of the Fundamental Wave of Wound-Rotor Brushless Doubly-Fed Machine" Energies 12, no. 6: 1172. https://doi.org/10.3390/en12061172

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