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JPE, Vol. 17, No. 4, July 2017
Acoustic Noise of Brushless DC Motors Induced by Electromagnetic Torque Ripple
Kun Xia, Zhengrong Li, Jing Lu, Bin Dong, and Chao Bi
Area Adjustable Speed Drives
Abstract Torque ripple is one of the major sources inducing vibration and noise in brushless DC motors. This is especially true in applications such as the spindle motors used in hard disk drives. However, the relationship between torque ripple and acoustic noise/vibration is quite complicated. This paper presents a way to investigate this relationship with acoustic noise measurement and analysis. Results obtained with three different drive modes are used in the analysis. The results show that the acoustic noise analysis is very helpful in designing a high-performance drive strategy for BLDC motors.
Keyword Acoustic noise,BLDC motor,Drive strategy,Torque ripple
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