Browse Publications Technical Papers 2020-28-0341
2020-09-25

Study of dynamics stiffness and shape factor of rubber bush to address high frequency resonance issue in electric powertrain mounting system. 2020-28-0341

Electric motor mounts resonance at high frequency in the range of 600 to 900Hz with motor frequency results isolation performance deterioration. There is a selection process of motor mounts such that the high frequency resonance is avoided. The dynamic stiffness plays a major role on resonance frequency. Rubber shape factor and compound are directly contribute the dynamic stiffness properties of mount. Isolation efficiency depends on force transfer to the body and resonance phenomenon. In this paper, the design aspect of motor mounts are discussed which affect high frequency resonance. The wings effect of rubber bush has shown along with the impact of frequency shift. Finally it is shown for a given EV (Electric vehicle) powertrain system, a proper selection of mounts along with its internal structure play a big role in resonance avoidance, higher kinetic energy decoupling and very small CoG (Center of Gravity) movement under torque.

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