Research On Thermal Techniques Of Solid State Modules

Favorable thermal control are required for modern radar transmitter with high power,small volume and complicated application environments. To meet the demand of thermal dispersion of some solid-state module, System research for thermal techniques is carried out ,and the main contents are as follows…(1) The solid-state modules and interrelated thermal techniques are introduced on research background, and moreover developing tendencies of electronics cooling are described.(2) Thermal resistance model and CFD are used for thermal design of some air-cooled solid-state module. Among these thermal resistances, convective and spreading resistances are emphasized. Thermal Analysis software–Flotherm are used to establish three-dimension CFD model and carry out numerical simulation.(3)According to the working condition of the air-cooled solid state module, a testing system is established. Contrast the results of numerical analysis and experimental study, fine agreement exists between the numerical prediction and experimental results, which proved the rationality of theoretical model.(4)After the rationality of numerical simulation has been testified, going along a series of numerical simulation and performance research.Firstly, the thermal superposition Principle, based on adiabatic heat transfer coefficient and superposition Kernel function, is put forward for the research of discrete heat sources'temperature field and thermal conjunction effectsSecondly, decreasing thermal spreading resistance is good for improving the heat transfer performance, and several methods are discussed.