永磁无刷直流电动机低脉动转矩研究

doi:10.3969/j.issn.1000-1158.2022.07.17

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Abstract The permanent magnet brush-less DC motor (BLDCM) has obvious pulsating torque during operation, a new low pulsating torque BLDCM is proposed in order to solve this problem. Firstly, the physical analysis of permanent magnet brush-less DC motor pulsating torque is obtained under three factors, which are current commutation, polar arc coefficient less than 1 and armature reaction. Then, a new motor can generate the pulsating torque have same amplitude, same frequency and 180° phase difference is proposed, in order to realize the suppression strategy of the peak and valley complementation of the pulsating torque, and the method of peak and valley complementation of pulsating torque is found through theoretical analysis. Finally, the low ripple permanent magnet brush-less DC motor and its controller are developed, the effectiveness of pulsating torque suppression is verified through experiments. Compared with ordinary brush-less DC motor, the experimental results show that the pulsating torque can be reduced about 70%.

Key words： metrology brush-less DC motor electromagnetic torque pulsating torque peak-valley complementarity

Received: 18 September 2020 Published: 18 July 2022

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TB971

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	Articles by authors
	LU Jun
	ZHAO Hao
	ZHU Gao-lin
	FENG Hao

Cite this article:

LU Jun,ZHAO Hao,ZHU Gao-lin, et al. Research on Permanent Magnet Brush-less DC Motor with Low Pulsating Torque[J]. Acta Metrologica Sinica, 2022, 43(7): 944-951.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.07.17 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I7/944

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