CN201345503Y

CN201345503Y - Composite bus bar

Info

Publication number: CN201345503Y
Application number: CNU2009201014735U
Authority: CN
Inventors: 宋春龙; 刘革莉
Original assignee: Yongji Xinshisu Electric Equipment Co Ltd
Current assignee: Yongji Xinshisu Electric Equipment Co Ltd
Priority date: 2009-02-04
Filing date: 2009-02-04
Publication date: 2009-11-11
Anticipated expiration: 2019-02-04

Abstract

The utility model relates to an electric power electronic device, in particular to a composite bus bar, and solves the problem of greater parasitic electrical inductance generated by the prior direct current bus bar. The composite bus bar comprises a positive plate and a negative plate; the positive plate and the negative plate are mutually stacked and partially overlapped; an insulating layer is arranged between the positive plate and the negative plate, and the insulating layer is bound and fixed with the positive plate and the negative plate respectively; a wiring terminal of the positive plate and a wiring terminal of the negative plate are positioned in the same side; conductive posts and positioning holes are formed on the side edge on the plate surface of the negative plate and on the side edge of the non-overlapping plate surface part on the negative plate and the positive plate; the overlapping plate surface part on the negative plate and the positive plate is provided with positioning holes which are correspondingly overlapped with the positioning holes on the negative plate; and insulating films are pressed on the positive plate and the negative plate. The utility model has the advantages of unique design and simple structure, effectively solves the problem of greater parasitic electrical inductance generated by the prior direct current bus bar, and obtains favorable economical benefit and social benefit.

Description

Composite bus bar

Technical field

The utility model relates to power electronic device, specifically is a kind of composite bus bar.

Background technology

At power electronic technology and application apparatus to today of high frequency development, in the system particularly the parasitic parameter of connecting line produce huge electric stress, become the key factor that threatens the power electronic equipment reliability.The power device of high power frequency conversion power supply is in switching process, because the stray inductance on being subjected to from dc energy storage electric capacity to dc bus between the IGBT device and the influence of IGBT module self inductance, can produce very high peak voltage, this peak voltage can make device overheated, even make IGBT out of control and surpass the specified safety operation area of device and damage sometimes, thereby when the inner employing of high power frequency conversion power supply has dc bus now, connect absorption electric capacity between the C that needs at IGBT, the E utmost point, but this can make the structure of high power frequency conversion power supply become complicated.

Summary of the invention

The utility model produces the bigger problem of stray inductance in order to solve existing dc bus, and a kind of composite bus bar is provided.

The utility model is to adopt following technical scheme to realize: composite bus bar, comprise positive plate, negative plate, positive plate and negative plate stack mutually and positive plate and negative plate are overlapped, being provided with insulating barrier and insulating barrier between positive plate and the negative plate is adhesively fixed with positive plate and negative plate respectively, the binding post of positive plate and the binding post of negative plate are positioned at the same side, the lateral edges of negative plate plate face, be not equipped with conductive pole and location hole on the positive plate with the lateral edges of the overlapping plate face portion of negative plate, on the positive plate with the overlapping plate face portion of negative plate be provided with negative plate on the corresponding overlapping location hole of location hole, all be pressed with dielectric film on positive plate and the negative plate.Flat cross section is all adopted in the cross section of positive plate, negative plate, can make that stray inductance reduces; The selection of insulating material is then relevant with the voltage and the interlamellar spacing of DC master row, and dielectric film can play the effect that starting the arc phenomenon takes place between the end face that prevents positive plate and negative plate.

During use, composite bus bar directly inserts the DC loop of IGBT device, is the example explanation with inverter one phase brachium pontis, and 2 IGBT parallel connections of each brachium pontis are connected to the phase busbar between the upper and lower brachium pontis, connect load behind the phase busbar.As shown in Figure 4, concrete connection is as follows: the binding post of positive plate links to each other with positive source, the binding post of negative plate links to each other with power cathode, the collector electrode of IGBT device H1, H2 is arranged in the conductive pole on the positive plate, emitter passes location hole on the positive plate (emitter and positive plate insulation) and is connected with the conductive pole of busbar mutually, the emitter of IGBT device B1, B2 is arranged in the conductive pole on the negative plate, and collector electrode passes location hole on negative plate and the positive plate (collector electrode and negative plate insulation) and is connected with the conductive pole of busbar mutually; When last brachium pontis is worked, electric current flow to positive plate through the binding post of positive plate earlier, conductive pole on positive plate flow to the collector electrode of IGBT device H1, H2 again, and flow to phase busbar arrival load through the emitter of IGBT device H1, H2, and gets back to power cathode by other phase brachium pontis; During the work of following brachium pontis, electric current is from other phase brachium pontis, flow to the collector electrode of IGBT device B1, B2 through overload and phase busbar, and flow to negative plate through the emitter of IGBT device B1, B2, finally flow to power cathode through negative plate.In this process, because the binding post of positive plate and the binding post of negative plate are positioned at the same side, current direction in the positive plate is just in time opposite with current direction in the negative plate, know according to Theory of Electromagnetic Field, flow through the opposite electric current of direction in positive plate and the negative plate, its magnetic field cancellation, thereby the stray inductance that makes composite bus bar produce is minimum; Like this, adopt composite bus bar just to need not to connect absorption electric capacity again, thereby both improved the functional reliability of IGBT device, simplified the internal structure of high power frequency conversion power supply again greatly in high power frequency conversion power supply inside.

The utility model design is ingenious, simple in structure, by the structure of existing dc bus is improved design, efficiently solves existing dc bus and produces the bigger problem of stray inductance, and obtained good economic and social benefit.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Fig. 4 is a user mode reference diagram of the present utility model.

Among the figure: 1-positive plate, 2-negative plate, 3-insulating barrier, 4-binding post, 5-binding post, 6-conductive pole, 7-location hole.

Embodiment

Composite bus bar, comprise positive plate 1, negative plate 2, positive plate 1 stacks mutually with negative plate 2 and positive plate 1 is overlapped with negative plate 2, being provided with insulating barrier 3 and insulating barrier 3 between positive plate 1 and the negative plate 2 is adhesively fixed with positive plate 1 and negative plate 2 respectively, the binding post 4 of positive plate 1 is positioned at the same side with the binding post 5 of negative plate 2, the lateral edges of negative plate 2 plate faces, be not equipped with conductive pole 6 and location hole 7 on the positive plate 1 with the lateral edges of the overlapping plate face portion of negative plate 2, on the positive plate 1 with the overlapping plate face portion of negative plate 2 be provided with negative plate 2 on location hole 7 corresponding overlapping location holes 7, all be pressed with dielectric film on positive plate 1 and the negative plate 2.During concrete enforcement, the insulating barrier between positive plate and the negative plate adopts the GPO-3 laminated sheet.

Claims

1, a kind of composite bus bar, it is characterized in that: comprise positive plate (1), negative plate (2), positive plate (1) stacks mutually with negative plate (2) and positive plate (1) is overlapped with negative plate (2), being provided with insulating barrier (3) and insulating barrier (3) between positive plate (1) and the negative plate (2) is adhesively fixed with positive plate (1) and negative plate (2) respectively, the binding post (4) of positive plate (1) is positioned at the same side with the binding post (5) of negative plate (2), the lateral edges of negative plate (2) plate face, be not equipped with conductive pole (6) and location hole (7) on the positive plate (1) with the lateral edges of the overlapping plate face portion of negative plate (2), positive plate (1) plate face portion last and that negative plate (2) is overlapping is provided with negative plate (2) and goes up the corresponding overlapping location hole of location hole (7) (7), all is pressed with dielectric film on positive plate (1) and the negative plate (2).