一种减小无刷直流电动机噪声的PWM调制方法

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Abstract In the paper, the three-phase corporative modulation method is proposed for suppressing brushless DC motors commutation torque ripple and electromagnetic noise.In this method, there are three types of modulation.The duty cycle expressions of the off-going phase, the on-going phase, and the non-commutation phase are calculated.The finite element method is adopted to analyze transient acoustic field of one 5.5 kW.The proposed method is illustrated to be suitable to suppress electromagnetic noise.The torque ripple and electromagnetic noise with different PWM modulation method for the 5.5 kW prototype motor is built for test.The validity of the proposed method is confirmed by both simulation and experimental results.

Key words： Brushless DC motors commutation torque ripple noise modulation method finite element method

Received: 05 February 2015 Published: 07 July 2016

PACS:

TM315

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	Chen Jian
	Yu Shenbo

Cite this article:

Chen Jian,Yu Shenbo. A PWM Modulation Method to Decrease Noise of Brushless DC Motors[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 129-136.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/129

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