关键词: 电机控制器上盖, 模态, 拓扑结构, 噪声振动声振粗糙度

Abstract: Tend to improve the driving experience, and the NVH requirements of electric drive systems for electric vehicles are increasing. Compared with the low-frequency roar produced by the engine of fuel vehicles, the high-frequency noise generated by the electric motor of electric vehicles has a lower sound pressure level, but it is easier to cause discomfort to passengers. The upper cover of the motor controller is usually designed with a larger plane, which will amplify the noise. The upper cover of the motor controller has also become the main structural part that limits the NVH, and the mode is an important indicator for evaluating the NVH. The mode of the controller upper cover has become an effective means to improve NVH. A “dome” topology that is different from the traditional motor controller cover was proposed. The simple structure was used to effectively improve the mode. Through calculation, the application of the topological form can increase the mode of the motor controller cover from 636 Hz to 1 299 Hz, an increase of 104%.

Key words: motor controller upper cover, mode, topological structure, noise vibration harshness(NVH)