IGBT press-fitting structure

Abstract

The invention provides an IGBT press-fitting structure. The IGBT press-fitting structure comprises an IGBT assembly, a radiator assembly and a supporting assembly. The supporting assembly comprises a first end plate, a second end plate and a pull rod assembly. The first end plate and the second end plate are arranged in parallel, the two ends of the pull rod assembly are fixed to the first end plate and the second end plate respectively, and the first end plate, the second end plate and the pull rod assembly form a containing space. The IGBT assembly and the radiator assembly are arranged in the containing space. The IGBT press-fitting structure provided by the invention has a negative level output function, so that the IGBT press-fitting structure has a direct-current fault ride-through capability, and the operation stability of a multi-terminal flexible direct-current power transmission system is improved; according to the IGBT press-fitting structure, press fitting of the four IGBTs in the full-bridge sub-module is achieved through the five radiators, the first end plate, the second end plate and the pull rod assembly, press fitting of the IGBTs in the full-bridge sub-module is achieved on the basis that the size of the sub-module is not changed, the size of the full-bridge sub-module is the same as that of a half-bridge sub-module, and the structure is compact.

Description

Technical field[0001]The present invention relates to the field of power electronics, and more particularly to an IGBT press structure.Background technique[0002]The converter valve is the core device of the flexible DC transmission system. As the capacity and voltage level increases, the volume / weight of the converter valve, poor seismic performance, and cost-effective problems will gradually highlight. To solve this series of problems, the size of the sub-modules in the converter valve is reduced into the necessary conditions for the miniaturization of the converter valve.[0003]The IGBT press structure is an important component in the submodule, which determines the connection mode between the different components in the child module, affects the volume of the sub-module. The sub-module is divided into a half-bridge sub-module and a full bridge module. In the actual application of the vapor valve, the internal half-bridge sub-module IGBT compression structure does not have a nega...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the poor operation stability of the multi-terminal flexible DC power transmission system caused by the lack of DC fault ride-through capability of the half-bridge sub-modules in the prior art, the present invention provides an IGBT press-fit structure, including IGBT components, radiator components and supports components;

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