电动汽车用外转子轮毂电机热性能仿真研究
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摘要
针对电动汽车用轮毂电机在运行过程中因温度过高而对电机安全性能和使用寿命造成影响的问题,本文在轮毂电机设计之初对其进行了热性能的仿真研究。论文首先基于热网络原理,建立热网络几何模型,然后对电机内的热传递进行分析,并对电机内的温度场及温度变化规律进行仿真与分析,最后结合CFD方法对重复制动工况下的电机温升问题进行仿真。此仿真方法与结果对轮毂电机前期的热性能设计具有一定的参考意义。
For the effects on the safety and service life of the out- rotor in- wheel motor for EV,due to the high temperature,study and simulation of thermal performance are conducted at the beginning of the in-wheel motor design.First,thermal network geometric model is built based on the principle of thermal network.Then,heat transfer is analyzed and the temperature field inside the motor and the regularity of temperature change are simulated and analyzed.Finally,by using CFD,the motor temperature rise is simulated during the repetitive braking condition.The method and the result of the simulation will give some positive suggestions to the design of thermal performance of the in-wheel motor in the early design stage.
引文
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