光纤激光器电源模块有限元热分析研究

Thermal Analysis for Power Module of Fiber Laser Based on FEM

电源模块作为光纤激光器的重要部件,其工作性能受温度影响很大。为解决电源模块过热和温度分布不均匀的问题,提高其热可靠性,采用有限元法对某型光纤激光器的电源模块进行了热仿真分析。试验测试数据与软件仿真结果具有高度的一致性,整体趋势吻合,最大误差不超过5%,验证了仿真模型的正确性和可行性。在此基础上提出了优化元件布局的散热改进方案,并进行了仿真计算。改进后最高温度降低了3.8℃,且整场温度分布更加均匀。结果表明,合理优化元件布局,可有效改善电源模块的散热状况。

The power module is an important component for the fiber laser and temperature has a significant impact on its performance. In order to solve the problem of overheating and non-uniform temperature distribution and to improve the thermal reliability, the power module of fiber laser is analyzed using finite element method for its thermal properties and temperature field. A good agreement between simulation results and experimental data is obtained. The variation trends are similar and the maximum error is less than 5%, which proves the correction and feasibility of the simulation model. A scheme to improve the heat distribution based on optimization of electronic components placement is proposed. The simulation results show that the maximum temperature is decreased by 3.8 ℃ and the temperature uniformity is better than the original design. As a conclusion, the heat distribution condition of the power module can be improved effectively by arranging the electronic components reasonably.