Effects of surface shape of generator rotor claw pole on electromagnetic vibration and noise of motor and optimization strategy

LI Zhibo1, 2, HE Xiping1, ZHANG Guofeng3

Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (7) : 68-75.

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (7) : 68-75.
VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Effects of surface shape of generator rotor claw pole on electromagnetic vibration and noise of motor and optimization strategy

  • LI Zhibo1,2, HE Xiping*1, ZHANG Guofeng3
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Abstract

In order to study the influence of the claw pole of claw pole generator on the electromagnetic vibration and noise of the alternators, an analytical model of the electromagnetic force of the claw pole generator was established, furthermore, the frequency characteristics of the electromagnetic force were analyzed. Based on the analytical model of electromagnetic force, a method is proposed to calculate the relationship between the surface intercept line of rotor claw pole and the harmonic components of the electromagnetic force, the influence of the former on the latter is Analyzed. An optimization scheme for the rotor claw pole is proposed to mitigate electromagnetic force, which eliminates the third-order components on the rotor claw pole surface and weakens the 36th order electromagnetic force. The effects of the rotor claw pole before and after optimization on electromagnetic vibration and noise are simulated. The results show that, with the optimized rotor claw pole, the 36th-order acceleration of the electromagnetic vibration on the surface of the stator is reduced by 53%. The 36th-order sound power of the electromagnetic noise is reduced by 13 dB, and the total sound power of the electromagnetic noise is reduced by 2.6 dB. Tests on the developed prototype show consistency with the calculated results. This work can provide a reference for controlling the electromagnetic noise of motors.

Key words

claw pole generator / electromagnetic force / electromagnetic vibration noise / claw pole / simulation calculation

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LI Zhibo1, 2, HE Xiping1, ZHANG Guofeng3. Effects of surface shape of generator rotor claw pole on electromagnetic vibration and noise of motor and optimization strategy[J]. Journal of Vibration and Shock, 2025, 44(7): 68-75

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