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Combined busbar applied to parallel connection of IGBTs

A composite busbar and parallel technology, applied in the direction of output power conversion devices, conductors, insulated cables, etc., can solve the problems of parallel IGBT module current imbalance, uneven distribution of lead inductance, IGBT module damage, etc., to eliminate mutual inductance, Uniform distribution of lead inductance and high installation efficiency

Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When implementing a high-power converter, limited by the capacity of current power semiconductor devices, multiple IGBT modules need to be connected in parallel; Uneven distribution of inductance leads to unbalanced current of parallel IGBT modules, which may lead to damage of IGBT modules in severe cases

Method used

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  • Combined busbar applied to parallel connection of IGBTs
  • Combined busbar applied to parallel connection of IGBTs
  • Combined busbar applied to parallel connection of IGBTs

Examples

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Embodiment 1

[0033] Such as Figure 1-4 As shown, the inventive composite busbar of this example is composed of multiple superimposed conductor layers, insulating layers, and insulating plates. The composite busbar includes an insulating layer 1 and an AC output plate conductor layer 2 arranged sequentially from top to bottom. , insulating layer two 3, insulating plate one 4, insulating layer three 5, positive plate conductor layer 6, insulating layer four 7, insulating plate two 8, insulating layer five 9, negative plate conductor layer 10 and insulating layer six 11. The composite busbar is according to insulating layer one 1, AC output plate conductor layer 2, insulating layer two 3, insulating plate one 4, insulating layer three 5, positive plate conductor layer 6, insulating layer four 7, insulating plate two 8, Insulating layer five 9, negative plate conductor layer 10 and insulating layer six 11 are sequentially stacked on the mold layer by layer; the composite busbars after stackin...

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Abstract

The invention relates to a combined busbar applied to the parallel connection of IGBTs. The combined busbar is formed by superimposing an insulating layer made of a PET (polyethylene glycol terephthalate) material, a conductor layer and an insulation board, wherein the conductor layer comprises an alternating current output plate conductor layer, a positive plate conductor layer and a negative plate conductor layer; an elongated slot is formed in one side of the current output end of each of the alternating current output plate conductor layer and the negative plate conductor layer. According to the combined busbar, the path of current on the busbar is changed, and the problem of unbalance of current of IGBT modules which are connected in parallel is solved.

Description

Technical field: [0001] The invention relates to a composite busbar, in particular to a composite busbar suitable for parallel connection of IGBTs. Background technique: [0002] Composite busbars and traditional discrete busbars can be used as electrical connection parts between power modules. However, the parasitic inductance of traditional busbars is too large. device poses a threat. The greater the distributed inductance, the greater the load current, and the shorter the current drop time of the switching device, the more serious the hazard, which will not disappear due to the selection of the switching device. In order to eliminate this hazard, more and more people use composite busbar technology. [0003] The advantages of composite busbars are: [0004] 1 Low distributed inductance, low inductance design, the positive and negative conductors of the same circuit are pressed together, the distributed inductance cancels each other out, and the sealing method of the mo...

Claims

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Application Information

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IPC IPC(8): H02M1/00H01B7/02
CPCH02M7/003
Inventor 韩天绪王轩赵刚刘慧文王柯杨芬丽
Owner STATE GRID CORP OF CHINA