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http://dx.doi.org/10.5370/JEET.2018.13.1.315

Optimum Air-Gap Flux Distribution with Third Harmonic Rotor Flux Orientation Adjustment for Five-Phase Induction Motor  

Kang, Min (College of Automation and Electrical Engineering, Zhejiang University of Science and Technology)
Yu, Wenjuan (Central China Branch of State Grid Corporation of China)
Wang, Zhengyu (Hunan CRRC Times Electric Vehicle Co. LTD.)
Kong, Wubin (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
Xiao, Ye (Hunan CRRC Times Electric Vehicle Co. LTD.)
Publication Information
Journal of Electrical Engineering and Technology / v.13, no.1, 2018 , pp. 315-325 More about this Journal
Abstract
This paper investigates optimum air-gap flux distribution with third harmonic rotor flux orientation adjustment for five-phase induction motor. The technique of objective is to generate a nearly rectangular air-gap flux, and it improves iron utilization under variation loading conditions. The proportional relations between third harmonic and fundamental plane currents is usually adopted in the conventional method. However, misalignment between fundamental and third harmonic component occurs with variation loading. The iron of stator teeth is saturated due to this misalignment. This problem is solved by third harmonic rotor flux orientation adjustment simultaneously, and direction and amplitude are changed with mechanical load variation. The proposed method ensures that the air-gap flux density is near rectangular for a maximum value from no load to rated load. It is confirmed that the proposed method guarantees complete both planes decoupling with third harmonic flux orientation adjustment. The effectiveness of the proposed technique is validated experimentally.
Keywords
Air-gap flux; Five-phase induction motor; Third harmonic; Nearly rectangular; Orientation adjustment;
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