Subway permanent magnet traction inverter chopper power module composite busbar

Abstract

The invention discloses a subway permanent magnet traction inversion chopper power module composite busbar, which is used to solve problems of conventional composite busbars such as heavy weight, complicated structure, and inconvenient installation. An inversion output busbar is formed by fixedly arranging three right angle-shaped copper bar bodies, and the upper end of every copper bar body is provided with an inversion output terminal. A chopper resistance busbar is formed by a right angle-shaped copper bar body, and the upper end of the chopper resistance busbar is provided with a chopper output terminal. An inversion direct current busbar and a chopper direct current busbar are respectively provided with a screwed sleeve, and a supporting capacitance busbar and an inversion direct current busbar are in a vertical arrangement, and in addition, one end of the supporting capacitance busbar is provided with a bolt connecting board cooperated with the screwed sleeves. The other end of the supporting capacitance busbar is provided with two direct current bus positive pole terminals and a direct current bus negative pole terminal. The subway permanent magnet traction inversion chopper power module composite busbar is advantageous in that the weight of the composite busbar is integratedly reduced, inductance of a circuit is reduced, and working reliability of an IGBT is improved.

Description

technical field [0001] The invention relates to a composite busbar, in particular to a composite busbar of a subway permanent magnet traction inverter chopper power module. Background technique [0002] During the switching process of the power device of the high-power variable frequency power supply, due to the influence of the parasitic inductance on the DC bus between the DC energy storage capacitor and the IGBT device and the inductance of the IGBT module itself, a high peak voltage will be generated. This peak, It will increase the current passing through the device, eventually causing the device to overheat, and sometimes even cause the IGBT to lose control and exceed the rated safe working area of ​​the device and be damaged. To deal with this risk, composite busbars are generally used for electrical connection of power devices, which can reduce the impact of stray inductance in the line on power devices. [0003] Composite busbars are generally composed of copper ba...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of heavy weight, complex structure and inconvenient installation in the existing composite busbar, the present invention provides a composite busbar for subway permanent magnet traction inverter chopper power module

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