Abstract：To improve the reliability and the operation life of electronic power conditioner of microwave power module ( MPM) , a thermal analysis was presented and a thermal optimized design of electronic power conditioner of MPM was proposed. A thermal simulation model of the complete machine was built to obtain the temperature distribution. Then the distance of metal oxide semiconductor ( MOS) tubes was changed, and the optimized design of shell with air cooling heat dissipation was adapted, thus the temperature of the complete machine decreased obviously and the distribution of heat got more even. Finally, an experimental proto was developed and tested. The results demonstrated a great increase of the capacity of heat dissipation in comparison with the original design, and verified the rationality of thermal optimization design.

Keyword：microwave power module electronic power conditioner;thermal simulation model;thermal optimized design;ANSYS thermal simulation;