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Study on the Vehicle Cabin Noise Employing the Interfacial Friction in Double Layered Frames Used in Electric Vehicle Traction Motors

机译:电动车辆牵引电动机中使用双层框架界面摩擦的车厢噪声研究

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摘要

Electric vehicles are considered not only eco-friendly but also quieter than vehicles with conventional internal combustion engines. However, less noisy environments in cabins make passengers feel uncomfortable to moderate noise. This paper discusses noise reduction for electric vehicles radiated from traction motors. In the analysis of the noise generation mechanisms it is demonstrated that frequency ranges of the highest level in the noise spectrum of electromagnetic harmonic orders of the induction motor coincide with structural resonances of the motor housing. Interfacial friction between the inner and outer housings of the motor is employed in reducing structural vibration of the motor. Measured noise in the cabin and vibration at the motor housing indicates that slip damping presented from interfacial friction between the inner and outer housing is effective in reducing noise from the traction motor and in the cabin.
机译:电动汽车不仅被认为是生态友好的,而且比具有传统内燃机的车辆更安静。然而,舱室里的嘈杂环境较少让乘客对中等噪音感到不舒服。本文讨论了从牵引电动机辐射的电动车辆的降噪。在对噪声产生机制的分析中,证明了感应电动机的电磁谐波频率的噪声频谱中最高水平的频率范围与电动机壳体的结构谐振一致。电动机的内部和外壳之间的界面摩擦在降低电动机的结构振动中。机舱和电动机壳体的振动中的测量噪声指示从内壳和外壳之间的界面摩擦呈现的滑动阻尼在降低牵引电动机和机舱中的噪声。

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