A PWM Modulation Method to Decrease Noise of Brushless DC Motors
Chen Jian1, Yu Shenbo2
1.National Engineering Research Center for REPM Electrical Machines Shenyang University of Technology Shenyang 110870 China 2.School of Mechanical Engineering Shenyang University of Technology Shenyang 110870 China
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.
陈健, 于慎波. 一种减小无刷直流电动机噪声的PWM调制方法[J]. 电工技术学报, 2016, 31(9): 129-136.
Chen Jian, Yu Shenbo. A PWM Modulation Method to Decrease Noise of Brushless DC Motors. Transactions of China Electrotechnical Society, 2016, 31(9): 129-136.
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2016, Vol. 31 
