A flat-plate microheat pipe was applied to an IGBT radiator of metro converter

resulting in a new flat-plate microheat pipe radiator design. The mathematical model was established through a reasonable simplification of the physical model. The traditional fin radiator and flat microheat pipe radiator were simulated and compared by ICEPAK software

and the correctness of the calculation was verified via experiments. Results showed that the flat-plate microheat pipe radiator greatly improves the radiation efficiency of the radiator. Specifically

the maximum temperature of the flat-plate micro heat pipe radiator was 70.27 ℃ or 25.79 ℃ lower than that of the traditional fin radiator. The theoretical calculation results showed that the IGBT junction temperature was 110.23 ℃

meeting the working requirements of the IGBT. Furthermore

there is a good agreement between the results of the numerical simulation and experiments

as indicated by the maximum temperature error of 7.07%. Practically

this study provides an important research method that could be a basis for the design and application of flat-plate microheat pipe radiator.