Journal of Electrical Engineering ›› 2015, Vol. 10 ›› Issue (5): 43-50.

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Simulation and Experiment Study on Reducing Torque Ripple for Automotive Claw-Pole Alternators

Yang Fan,Bao Xiaohua,Wu Feng,Li Jiaqing,Wei Qiong   

  1. Hefei University of Technology Hefei 230009 China
  • Received:2015-01-15 Online:2015-05-25 Published:2015-05-25

Abstract:

As for how to reduce torque ripple of claw-pole alternators, a method of magnet pole edge cutting under pole-arc coefficient theory is proposed to reduce torque ripple of claw-pole alternators, and a three dimension finite element model of the claw-pole alternator is presented to the simulaiton calculation. With guide of simulation calculation, the validity of proposed method of magnet pole cutting to reduce torque ripple of claw-pole alternators is verified by experimental results. Cogging ripple is an important component of torque ripple, and Fourier Tansformation of the distribution of magnetic flux density along the circumference of air gap is given to select the appropriate pole-arc coefficient. Experimental results shows the validity of the proposed method and there is a strong correlation among pole-arc coefficient, torque ripple and electromagnetic vibration.

Key words: Claw-pole alternator, cogging ripple, torque ripple, pole-arc coefficient, magnet pole edge cutting

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