1. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China;2. School of Automobile Studies, Tongji University, Shanghai 201804, China
To illustrate the vibration characteristics of the electrical wheel and suspension system under the working conditions, the test measuring the acceleration responses of the system was presented in this paper. And the influence factor analysis was also carried out. It was found that there is obvious order vibration in the electric wheel and test bed caused by the driving motor. And its frequencies were composed of 6 times, 12 times and 6±i/2(i=1,2,3) times of the current frequency. And the frequency interval of each other is half of the current frequency. What’s more, these frequencies are related to the non-sinusoidal magnetic field distribution, slotting and the harmonic current. The factors that influence the frequency component and the vibration energy are rotational speed and load torque. The rotational speed affects the frequency and the load torque affects the energy respectively. The vibration energy of the high frequency torque ripple increases when the electrical wheel is working at high load condition like high rotation speed and high torque. The factors of the vertical load, tire pressure and wheel alignment parameters have no effect on the frequency component. And the impacts on the vibration energy are also small. What’s more, the appropriate parameters, such as the vertical load, tire pressure and kingpin inclination angle and the small tore-in angle will restrain the vibration of the test bed. This paper provides the introduction for designing the structure of the electrical wheel-suspension system, the conditions of usage and designing the control system of the driving motor.
Zuo Shuguang;;Duan Xianglei;;Wu Xudong;.
Vibration test analysis of the electric wheel and suspension system on test bed[J]. Journal of Vibration and Shock, 2014, 33(12): 165-170
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