基于转子永磁体磁场定向的无刷直流电机转矩脉动抑制

doi:10.19595/j.cnki.1000-6753.tces.200061

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Abstract Due to the non-sinusoidal waveforms of main magnetic field distribution and back-EMF, there are large torque ripples in brushless DC motor under the driving with square wave current. Therefore, a torque control strategy to reduce torque ripple based on the rotor permanent magnet field orientation is proposed in this paper. Firstly, by analyzing the equivalent model for BLDCM rotor permanent magnet field orientation under d-q synchronous rotating coordinate system, it is shown that the armature reaction of d-axis and electromagnetic torque are determined by the current of d-axis and q-axis, respectively. Secondly, based on the principle that the d-axis armature reaction and the electromagnetic torque are unchanged after conversion, the transformation method between the three-phase current and the d- and q-axis currents is presented. Finally, the three-phase currents from the required d-axis and q-axis currents are obtained. These currents are regulated in closed loop form to realize the instantaneous constant torque control without magnetization and demagnetization. The test results obtained from Matlab simulation and DSP experiment show the feasibility and effectiveness of the proposed method.

Key words： Brushless DC motor (BLDCM) rotor permanent magnet field orientation torque ripple reduction d-axis armature reaction

Received: 14 January 2020

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TM351

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	Li Zhenguo
	Sun Qihang
	Wang Penglei
	Shao Shumin
	Jia Qingquan

Cite this article:

Li Zhenguo,Sun Qihang,Wang Penglei等. Torque Ripple Reduction of Brushless DC Motor Based on Rotor Permanent Magnet Field Orientation[J]. Transactions of China Electrotechnical Society, 2020, 35(14): 2987-2996.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200061 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I14/2987

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