Integrated double-sided air-cooled radiator and simplified power module

Abstract

The invention relates to a power module and a radiator structure of the power module, in particular to an integrated double-sided air-cooled radiator and a simplified power module, and the integrated double-sided air-cooled radiator comprises two radiating substrates and a heat pipe radiator assembly; the heat pipe radiator assembly comprises a first phase change heat pipe, a second phase change heat pipe, a first liquid storage box, a second liquid storage box, a heat transfer working medium and a sealing cover. The phase change heat pipes are connected between the first liquid storage box and the second liquid storage box; the first phase change heat pipe and the second phase change heat pipe are respectively divided into an evaporation section, a heat insulation section and a condensation section according to the flowing direction of the heat transfer working medium; and the first liquid storage box is fixed on a first heat dissipation substrate on the left side, and the second liquid storage box is fixed on a second heat dissipation substrate on the right side, so that the problem of non-ideal isothermal and flow-equalizing effects among different bridge arms is solved. The simplified power module adopts a double-sided symmetrical structure, double-sided devices are respectively symmetrical about a middle air duct, and each side is provided with four IGBTs which are uniformly arranged on the surface of the heat dissipation substrate, so that the functions of various different circuit topologies are realized.

Description

technical field [0001] The invention relates to a power module and a radiator structure of the power module, in particular to an integrated double-sided air-cooled radiator and a simplified power module. Background technique [0002] With the rapid development of railway train conversion technology, the integration of power modules is getting higher and higher, and the power density is correspondingly increased. Therefore, power modules need more efficient heat dissipation capabilities and more reliable working performance. [0003] There are two main heat dissipation methods for power modules: air cooling and water cooling. Due to the high integration and high power density of the power module, water cooling is usually used for heat dissipation, and the power device of the water cooling radiator can be installed on one side or on both sides, which is a good choice for high heat flux heat dissipation. However, the water cooling system is more complicated and the cost is hig...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1) The power modules are arranged front and back in the air duct, and the air outlet of the front module is used as the air intake of the rear module. The closer the arrangement is to the rear, the higher the air temperature and the worse the cooling effect

2) The difference in cooling effect cannot meet the requirements of the main circuit of the power module that several power modules with single-sided heat dissipation must have the same heat dissipation effect

Since the saturation voltage and forward voltage drop of the power device IGBT are affected by temperature, uneven heat dissipation will cause a module or some modules to shift from the static operating point, thereby affecting current sharing and greatly reducing the working performance of the power module.

The heat dissipation of several power modules with single-sided heat dissipation cannot guarantee the isothermal performance of parallel IGBTs

[0007] High-speed EMUs, heavy-duty locomotives, hybrid internal combustion vehicles and other vehicles have higher and higher requirements for power density. The heat pipe phase change heat dissipation technology of power modules has gradually become the mainstream heat dissipation method of non-liquid cooling methods. Moreover, the current types of power modules There are many power modules with different functions, from design to production, occupy a lot of time cost, procurement cost, and cause a lot of inventory pressure. Therefore, a simplified power module with general functions is needed to realize the integration of various power modules. function, thereby reducing the types and quantities of spare parts and reducing inventory pressure

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