CN204696935U

CN204696935U - Be applicable to the rectification composite bus bar of standardization motor train unit traction power module

Info

Publication number: CN204696935U
Application number: CN201520251521.4U
Authority: CN
Inventors: 张丹; 李守蓉; 陈彦肖; 牛勇; 胥会兵
Original assignee: Yongji Xinshisu Electric Equipment Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2015-10-07
Anticipated expiration: 2025-04-24

Abstract

The utility model relates to the composite bus bar as power cell component parts, be specially the rectification composite bus bar being applicable to standardization motor train unit traction power module, comprise left composite bus bar and right composite bus bar, left composite bus bar and right composite bus bar are all built up by positive busbar, negative busbar and alternating current bus bar, left and right specular in left composite bus bar and right composite bus bar structure, and positive busbar, negative busbar and alternating current bus bar structure are flat.Cable in main circuit or single composite bus bar are done integrally composite bus bar by the utility model, meet the requirement of the low sense of main circuit.This composite bus bar can be used as the component parts of rectification unit, wherein left composite bus bar can arrange rectifying bridge arm, right composite bus bar can arrange rectifying bridge arm, which reduce system power element number, reduce system bulk, weight and noise, and facilitate maintenance and the maintenance of main circuit.

Description

Be applicable to the rectification composite bus bar of standardization motor train unit traction power module

Technical field

The utility model relates to the composite bus bar as power cell component parts, is specially the rectification composite bus bar being applicable to standardization motor train unit traction power module.

Background technology

The power device of high power frequency conversion power supply is in switching process, connect owing to adopting cable or copper bar between main circuit component, the impact of the stray inductance the DC bus between from DC energy storage electric capacity to IGBT module and IGBT module own inductance, very high peak voltage can be produced, this spike, can make to be increased by the electric current of device, finally cause device overheated, even sometimes make IGBT out of control and exceed the load rated safety service area of device and damage.What current EMU generally adopted is all single power cell, a rectification unit being connected to form by single composite bus bar or cable of combination of two in systems in which, integrated level is not high, the rectification unit circuit stray inductance of this structure is large, power device easily damages, and circuit reliability is poor, efficiency is low; When connecting with cable or single composite bus bar between main circuit device, the stray inductance of circuit is larger, in main circuit switch process, higher due to voltage spikes will be produced in IGBT device, certain impact is had to power device, affect the life-span of power device, thus reduce the reliability of power conversion circuit; And single composite bus bar technological borrowing is in external matured product or technology, easy piracy of intellectual property rights, and when breaking down, can not find problem place, can only change, can not thoroughly deal with problems; Integrated level is low, and cost is high, takes up space large.

Summary of the invention

There is main circuit cable when rectified power unit main circuit utilizes cable or single composite bus bar to connect or copper bar stray inductance is large, integrated level is low, cost is high and the large problem that takes up space to solve in the utility model, provides the rectification composite bus bar being applicable to standardization motor train unit traction power module.

The utility model adopts following technical scheme to realize: the rectification composite bus bar being applicable to standardization motor train unit traction power module, comprise left composite bus bar and right composite bus bar, left composite bus bar and right composite bus bar are all built up by positive busbar, negative busbar and alternating current bus bar, left and right specular in left composite bus bar and right composite bus bar structure, and positive busbar, negative busbar and alternating current bus bar structure are flat.

This composite bus bar can be used as the component parts of rectification unit, wherein left composite bus bar can arrange rectifying bridge arm, right composite bus bar can arrange rectifying bridge arm, which reduce system power element number, reduce system bulk, weight and noise, and facilitate maintenance and the maintenance of main circuit; Known by Theory of Electromagnetic Field in addition, line is made flat cross section, the more Bao Yuekuan done under same cross section, its stray inductance is less, contrary electric current is flow through in adjacent wires, its magnetic field cancellation, stray inductance also can be made to reduce, and adjacent conductor spacing is less, stray inductance is less, according to above theory, the cable in main circuit or single composite bus bar are done integrally composite bus bar by the utility model, meet the requirement of the low sense of main circuit.

The beneficial effect that the utility model brings is:

1) reduce loop inductance and power circuit oscillation, improve the reliability of IGBT work;

2) structure is simple, reduces production difficulty, provides cost savings;

3) system bulk and weight is reduced.

Accompanying drawing explanation

Fig. 1 is rectified power unit main circuit schematic diagram.

Fig. 2 is rectification composite bus bar structural representation.

Fig. 3 is left composite bus bar electric interfaces figure.

Fig. 4 is right composite bus bar electric interfaces figure.

Embodiment

Be applicable to the rectification composite bus bar of standardization motor train unit traction power module, comprise left composite bus bar and right composite bus bar, left composite bus bar and right composite bus bar are all built up by a positive busbar, a negative busbar and alternating current bus bar, left and right specular in left composite bus bar and right composite bus bar structure, and positive busbar, negative busbar and alternating current bus bar structure are flat, as shown in Figure 2.

During concrete enforcement, the utility model completes rectification unit electrical connection by composite bus bar, and main circuit principle as shown in Figure 1.According to circuit theory diagrams, H1aIGBT and H2aIGBT is in parallel, B1aIGBT and B2aIGBT composes in parallel rectifying bridge arm, H1bIGBT and H2bIGBT is in parallel, B1bIGBT and B2bIGBT composes in parallel rectifying bridge arm, two rectifying bridge arms are connected to form the rectification circuit of two-tube parallel connection, and S (+) and S (-) are DC output end, and S (A) and S (B) input as four-quadrant single-phase rectifier.

This rectification composite bus bar is left and right mirror image, and it is that the conductor part in Fig. 1 is divided into two parts, and every part is all an independently four-quadrant power busbar.From structure, a complete rectification busbar is jointly formed by one piece of left composite bus bar and one piece of right composite bus bar, comprise a positive busbar S(+ of direct current), a direct current bears busbar S(-) and alternating current bus bar be respectively S3 (A), S4 (B), concrete structure as shown in Figure 3, Figure 4.

According to circuit theory, each composite bus bar of this rectification busbar is divided into three layers, i.e. positive busbar, negative busbar and single phase alternating current (A.C.) input busbar.This composite bus bar adopts the copper bar that 3mm is thick, copper bar surface electrolytic tinning 8um(100% tin), maximum alternating current is 1000A, and direct-current working volts are 3600V, and dielectric voltage withstand is 9600V.Minimum creep distance: >=50mm, minimum electric clearance: >=26mm.

Claims

1. be applicable to the rectification composite bus bar of standardization motor train unit traction power module, it is characterized in that: comprise left composite bus bar and right composite bus bar, left composite bus bar and right composite bus bar are all built up by positive busbar, negative busbar and alternating current bus bar, left and right specular in left composite bus bar and right composite bus bar structure, and positive busbar, negative busbar and alternating current bus bar structure are flat.