Mechanical press mounting structure of group large-power flat-plate power electronic device

Abstract

The invention relates to a mechanical press mounting structure of a group large-power flat-plate power electronic device, which is technically characterized in that firstly, a left ejector pin is coaxially installed in a spring mandrel in a sliding mode, the spring mandrel is installed on a left support plate through a key pin which is mounted along the radial direction of the spring mandrel, a set of disk springs is mounted on the spring mandrel at the right end of the support plate, an annular groove is radially manufactured on the spring mandrel at the right end of the support plate, and a limiting chuck is mounted in the annular groove; secondly, a press mounting screw is coaxially engaged in the spring mandrel at the left side of the left ejector pin; and thirdly, the right end of the left ejector pin and a left pressure plate are in spherical pair installation, and the left end of the a right ejector pin and a right pressure plate are in spherical pair installation. In the mechanical press mounting structure, the disk springs are adopted as driving elements, the compression stroke of the disk springs are accurately controlled through machining parts and has nothing to do with the assembly precision; the mechanical pressing force is accurately controlled with constant pressure; and the structure has large latitude for the assembly length of power device series, eliminates the assembling clearance, has self-adaption for the length of the power device series in a certain range, and has high press mounting precision.

Description

technical field [0001] The invention relates to the press-fitting of electronic devices, in particular to a mechanical press-fitting structure of grouped high-power flat-plate power electronic devices. Background technique [0002] Power electronic devices are the main devices that constitute the main circuit of power electronic conversion systems (such as frequency converters, power grid dynamic compensators, etc.). High-power planar power electronic devices can only work normally after the pressure specified in the technical data is applied to the anode and cathode surfaces by external force. [0003] The press-fitting of a single flat-panel power electronic device is relatively simple. Generally, its two planes are in direct contact with two radiators, and then spring steel (or spring washers) and some bolts are added to the two radiators, and the bolts are fastened. It is sufficient to apply a specified pressure along the axial direction of the flat power electronic dev...

AI Technical Summary

Problems solved by technology

If the press-fitting force is too small, the thermal resistance of the conductive contact surface of the flat power electronic device will increase, which is not conducive to heat dissipation; in addition, the contact inside the device such as the control electrode may also be in a bad state, and it is likely to be out of control.

If the pressing force is too large, the flat power electronic device may be directly damaged

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