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The Noise and Vibration Analysis of BLDC Motor Due to Asymmetrical Permanent-Magnet Overhang Effects

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3 Author(s)
Gyu-Hong Kang ; GEM-TECH Co., Ltd., Changwon ; Young-Dae Son ; Gyu-Tak Kim

This paper relates to a vibration analysis of brushless dc (BLDC) motors using the asymmetrical Z-axis overhang of permanent magnet (PM). In BLDC motor, the asymmetrical Z-axis overhang of PM generates Z-axis thrust, which leads to Z-axis eccentric force by commutated current on the rated load and then the Z-axis vibration. The Z-axis thrust ripple, which is the source of Z-axis vibration under commutated current, is analyzed by using 3-D finite element method, and the phenomena of Z-axis vibration are analyzed by experimentation.

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Industry Applications, IEEE Transactions on  (Volume:44 ,  Issue: 5 )