大功率电流源型整流装置散热设计

Design of heat dissipation for high-power current source rectifier

目前多采用软件仿真进行热设计,但很多器件厂家无法提供准确的仿真模型导致仿真结果偏差较大。采用等效热阻法对热源周围温度场分布进行说明,介绍一种通过数据解析和曲线拟合方法求解风机工作点,进行散热设计的方法,可以方便且准确地进行散热设计,并能够拟合出在风道受阻后的散热情况。通过样例设计对详细步骤进行了说明,并通过样机温升测试验证了该方法的准确性和实用性。

At present, the software simulation is used for thermal design, but many device manufacturers cannot provide aeeurate sinmlation model, which leads to the large deviation of simulation resuhs. The distribution of heat souree temperature field is ？ described by adopting method of equivalent thermal resistance. After that, a method for thermal design is introduced through data analysis and eurve fitting to solve the fan working point, which can be aeeurate and convenient, and can fit out the heat dissipation after air duct obstruction. The detailed steps are illustrated by the sample design, and the aeeuraey and practicability of the method are verified by the temperature rise test of the prototype.