To analyze the multi parameter coupled vibration of in-wheel motor, a coupled vibration model with six-freedom degrees was established, in which the oil film stiffness and damping of sliding bearing, the generalized electromagnetic force, stiffness of stator shaft and bolt stiffness are identified. Vibration induced by electromagnetic force was calculated in the Simulink model, and the result shows that: electromagnetic force produced by the interaction of permanent magnetic field and armature magnetic field will excite a new torsional vibration peak for stator. According to the comparison of torsional vibration in different speeds, it’s been pointed out that in-wheel motor owns bigger torsional vibration amplitude in a low speed, which will provide new methods to reduce the low speed jitter of electric vehicles.
Key words
in-wheel motor /
sliding bearing /
electromechanical coupling /
torsional vibration /
MATLAB/Simulink simulation
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