Abstract
The electric vehicle which is one of the zero emission vehicle is aimed at the acceptable thing widely favorably to the market and high performance, it is found in the quietness to assume it an attractive vehicle. A motor noise is famous for the representative vibration and noise phenomenon of the electric vehicle. A motor noise decrease has the measures method in the body and the chassis, but making low vibration of the motor which is source of vibration and noise is important. This paper introduces the occurred mechanism of an order frequency becoming the problem and Analytical technology to predict high-precision motor vibration. In addition, this paper introduces the study result and the mechanism inspection result to reduce the motor vibration which aimed at a motor fabric and the specification such as slot combination or the dimension by the experiment.
