Intelligent power module

Abstract

The invention relates to an intelligent power module which comprises a shell, a cover board and a master circuit board, wherein the upper end surface and the lower end surface of the shell are respectively provided with an upper seam allowance and a lower seam allowance; the middle of the inner wall of the shell is provided with at least two supporting seats; the lower part is provided with a crossbeam; a metal-covered insulating substrate on the master circuit board is connected with each device; the metal-covered insulating substrate is fixed on a copper bottom board; the master circuit board is fixed on the lower part of the shell in a sealing mode; the master circuit board is connected with the lower seam allowance of the shell and the crossbeam; an insulation board is installed on the supporting seat of the shell; a driving circuit board is installed on the upper part of the insulation board; a master electrode connected to the master circuit board extends out of the shell; two ends of a conductive needle passing through the insulation board are respectively connected to the master circuit board and the driving circuit board; the cover board is installed on the upper part of the shell and is connected with the upper seam allowance; and a pin connected to the driving circuit board penetrates out of the cover board. The intelligent power module has the characteristics of reasonable structure and small volume, and cooling effect can be improved.

Description

technical field [0001] The invention relates to an intelligent power module and belongs to the technical field of power module manufacturing. Background technique [0002] The IGBT power module is used in inverter welding machines, controllers of various switching power supplies, and electric vehicle controllers, etc. Its main function is to convert the input direct current (DC) into three-phase alternating current (AC) output. For low-power controllers, ordinary IGBT power modules require a drive unit and a three-phase power module to form a three-phase circuit; in the case of high power, ordinary IGBT power modules require three drive units respectively Add three power modules, a total of six parts to form a three-phase circuit work. Since the main circuit of the power module will generate high temperature when it is working, the controller usually uses two or six independent power modules and drive units. The power module and the drive circuit are electrically connected ...

AI Technical Summary

Problems solved by technology

However, due to the limited area of ​​the metal-ceramic substrate, the large-area DBC substrate will have a large arc, which makes it difficult to realize the connection of complex circuits. Moreover, the metal-ceramic substrate often appears concave after the welding process. , and the shell has no support beam, so when the customer installs it on the radiator, because the bottom plate of the power module often cannot form a good and close contact with the radiator, it will affect the heat dissipation effect of the power module during work. If the heat accumulates for a long time If it cannot be dissipated in time in the power module, it will greatly affect the quality of the power module, and even damage the chips in the power module, resulting in damage to the power module

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