A split composite bus bar suitable for diesel locomotive power module

A power module and composite busbar technology, which is applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components, etc. Ensure safe and reliable work, facilitate repair and maintenance, reduce size and weight

CN109217690APending Publication Date: 2019-01-15XIAN YONGDIAN ELECTRIC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-15

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Abstract

The invention discloses a split composite bus bar suitable for diesel locomotive power module, which is composed of a DC bus bar and an AC bus bar. The DC bus bar and the AC bus bar adopt a split structure. The DC bus bar and the AC bus bar are both of flat structure, and a plurality of DC bus bars and the AC bus bars are stacked with each other and installed together through support pad columns arranged on the DC bus bar or the AC bus bar. The invention adopts the laminated composite bus bar to replace the cable, and the copper bar or the hot compressed bus bar are electrically connected, thereby reducing the complexity of the previous wiring, making the layout simple and the quality more reliable; The volume and weight of the system are reduced, and the repair and maintenance of the maincircuit are convenient. The invention adopts symmetrical design and is completely applicable to two power modules installed in a mirror image. The more important thing is to reduce the loop inductance, ensure the IGBT work safely and reliably, and greatly improve the reliability of the product. At present, it has been successfully applied in the diesel locomotive traction inverter + chopper module in a small batch, and has achieved good economic benefits.
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Description

technical field

[0001] The invention belongs to the technical field of locomotives and relates to a power module of an internal combustion locomotive, in particular to a split composite busbar suitable for the power module of an internal combustion locomotive. Background technique

[0002] During the switching process of the power device of the high-power variable frequency power supply, due to 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, and the excessively high Accompanied by the increase of switching frequency, the peak voltage will cause the device to overheat, and sometimes even cause the IGBT to run out of control and exceed the rated safe working area of ​​the device and be damaged. To solve this problem, laminated composite busbars are usually used for electrical connection between power devices. It designs the main circuit bus ...

Examples

Embodiment Construction

[0034] see figure 2 with image 3 , the present invention is applicable to the split composite busbar of the diesel locomotive power module, which is composed of a DC busbar 1 and an AC busbar 2, the DC busbar 1 and the AC busbar 2 adopt a split structure; the DC busbar 1 and the AC busbar 2 are flat structures, and a plurality of DC busbars 1 and AC busbars 2 are stacked on top of each other and installed together by supporting pads arranged on the DC busbars 1 or AC busbars 2 .

[0035] DC busbar 1 and AC busbar 2 are mainly made of polyvinyl fluoride PVF board.

[0036] The insulation method between the stacked busbars of the present invention is: insulation and isolation between the adjacent stacked DC busbars and AC busbars is carried out through air, or laminated plates are used between the conductive layers of the stacked busbars Insulate. And the laminate is a GPO-3 laminate.

[0037] One side of the DC busbar 1 is provided with a folded edge, and a positive termi...