吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (3): 908-916.doi: 10.13229/j.cnki.jdxbgxb201703030

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Electromechanical coupled vibration characteristics of electric wheel under torque ripple

MAO Yu, ZUO Shu-guang, LIN Fu   

  1. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China
  • Received:2016-01-22 Online:2017-05-20 Published:2017-05-20

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Abstract: In view of the electromechanical-coupled vibration problem of electric wheel, the electromagnetic torque of permanent magnet synchronous motor is derived in taking account the effects of space harmonics of the permanent magnetic field. Then, based on the equations of coupled torsional and horizontal vibration, the inherent characteristics of the electric wheel system are analyzed. The electromechanical-coupled vibration model of the electric wheel is established by introducing closed-loop control of d/q axis current and combining the electromagnetic torque model and vibration equations. Based on this model the influence rules of electromechanical coupling effects on torque ripple and vibration performance are studied. Results show that the speed fluctuation of the rotor arising from torque ripple will in turn exert an effect of weakening on the torque ripple, especially at the rotating modal resonant operating condition of the electric wheel. The third modal damping ratio of the electric wheel coupling system is evidently influenced by the electromechanical coupling effects and varies with electromagnetic parameters, among which the magnet flux linkage has the largest impact.

Key words: automatic control technology, vehicle engineering, torque ripple, electric wheel system, electromechanical coupled vibration, modal damping ratio

CLC Number: 

  • TP29
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