Abstract
In order to control the vibration and noise of the ROEWE electric vehicle, it is necessary to carry out the experimental study on the vibration and noise of the electric motor. Firstly, two acoustic sensors are arranged on both sides of the road to measure the pass-by noise of the electric vehicle and to analyze the influence of motor noise on the passing noise. Then, several acoustic sensors are arranged in the vehicle to measure the noise signal in the vehicle, and to analyze the characteristics of interior noise. At the same time, one acoustic sensor and three vibration acceleration sensors are arranged in the vehicle power cabin to measure the vibration signal, and measure the signals of the upper and lower vibration acceleration sensors of the powertrain mount, and analyze the vibration and noise characteristics of the motor and the vibration isolation rate of the powertrain mount. The experimental results show that the vibration of the ROEWE motor has obvious order characteristics, which is mainly composed of order components of order 8, order 16, order 24, order 40, order 48 and order 72 based on the motor output shaft speed and frequency converter switching frequency components concentrating on 10000Hz and 20000Hz. Therefore, to reduce vehicle vibration and noise from the perspective of optimizing motor vibration, the impact of cogging torque on motor vibration should be mainly considered.
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