CN201504171U

CN201504171U - Novel thermal coating laminated composite bus bar

Info

Publication number: CN201504171U
Application number: CN200920217290XU
Authority: CN
Inventors: 曾礼; 曹怀亮; 李竹可
Original assignee: Yongji Xinshisu Electric Equipment Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2009-09-22
Filing date: 2009-09-22
Publication date: 2010-06-09
Anticipated expiration: 2019-09-22

Abstract

The utility model relates to the fields of a converting technology and an alternating current drive control application, in particular to a novel thermal coating laminated composite bus bar, which solves the problems that a domestic composite bus bar has poor insulating effect and inconvenient installation, and a foreign composite bus bar has high cost and high price and is not easily applied to an economical universal converter at present. The novel thermal coating laminated composite bus bar comprises an upper-layer bus bar and a lower-layer bus bar which are overlapped, wherein the width of the upper-layer bus bar is shorter than the width of the lower-layer bus bar, so that the upper-layer bus bar can be completely overlapped in the lower-layer bus bar, and an insulating layer is coated on a main body copper bar of the bus bar except the position needing to be connected with a power device; a copper gasket is respectively welded at the connected positions of the lower surface of the upper-layer bus bar with the power device and the upper surface of the lower-layer bus bar with the power device. After the novel thermal coating laminated composite bus bar is adopted, not only the processing cost is effectively lowered, but also the required performance requirement of the entire composite bus bar is simultaneously satisfied, the performance identical to the foreign entire composite bus bar is achieved, and the reliability and the installation convenience in converter application are improved.

Description

Novel heat coating lamination composite bus bar

Technical field

The utility model relates to Semiconductor Converting Technology and AC driving control application, and particularly the busbar in the current transformer is specially a kind of novel heat coating lamination composite bus bar.

Background technology

In AC driving device and Flow varying power supply application, a large amount of composite bus bar technology that adopt are to reduce the circuit stray inductance, suppress the peak voltage that IGBT constant power device produces in commutation course, but what mostly adopt in the present application is to install the independently mode of insulating pad between positive and negative busbar additional, this insulating pad and copper bar are not that the frame mode anti-shake performance of one is poor, all brought unfavorable factor for the integral insulation and the installation of device, loosening phenomenon in use takes place easily, thereby causes insulation effect to reduce.And the external whole composite bus bar technology that adopts not only cost height, price are expensive, and the producing process difficulty is big, the busbar integral thickness is big, limited the application of composite bus bar technology in economical general convertor.

Summary of the invention

The utility model provides a kind of novel heat coating lamination composite bus bar in order to solve that present domestic composite bus bar insulation effect difference is installed inconvenience, external composite bus bar cost high price is expensive and to be difficult for being applied to the problem of economical general convertor.

The utility model is concrete to adopt following technical scheme to realize: comprise the busbar that is connected with power device, described busbar is the upper and lower two-layer busbar of two overlapping installations, described upper strata busbar width is shorter than lower floor's busbar is overlapped in lower floor's busbar it fully, the main body copper bar of busbar except that need with part that power device is connected be coated with insulating barrier; The position that is connected with power device at the upper surface of the lower surface of upper strata busbar and lower floor busbar is welded with copper backing.

Composite bus bar is designed to essentially identical two parts of profile (upper and lower two-layer), at the outer surface that brings back to life copper bar except that the part of the conduction that need be connected with power device, remainder dipping or spraying epoxy powder layer, to reach the effect of insulation, its thickness is 1 ± 0.3mm.

During concrete the installation, adopt the mounting means of upper and lower two-layer closed assembly, at the position that composite bus bar is connected with power device, electroplate unglazed nickel, and at the corresponding size of upper surface silver soldering of the corresponding site of lower floor's busbar (lower floor's copper bar) and the tin-coated copper pad that thickness is 3～5mm; Equally, at the identical tin-coated copper pad of lower surface silver soldering of the corresponding site of upper strata busbar.

After adopting novel heat coating lamination composite bus bar described in the utility model, both effectively reduced the processing cost of composite bus bar, satisfy the needed performance requirement of whole composite bus bar again simultaneously, reach and the identical performance of external whole composite bus bar, improved the reliability in current transformer is used and the convenience of installation.On the basis that has reduced product cost, make that economical current transformer also can using integral composite bus bar technology, and the insulating capacity of composite bus bar can be born the withstand voltage 1min of 4000V, in application, can well reduce the stray inductance of main circuit, suppress the peak voltage that IGBT constant power device produces in commutation course.

Description of drawings

Fig. 1 is the structural representation of novel heat coating lamination composite bus bar described in the utility model upper strata busbar.

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

Fig. 3 is the structural representation of lower floor described in the utility model busbar.

Fig. 4 is the vertical view of Fig. 3.

Among the figure: 1-upper strata busbar, 2-copper backing, 3-lower floor busbar, the 4-upper strata busbar part of turning back, the 5-lower floor busbar part of turning back.

Embodiment

Novel heat coating lamination composite bus bar, comprise the busbar that is connected with power device, described busbar is the upper and lower two-

layer busbar

1,3 of two overlapping installations, described upper strata busbar 1 width is shorter than lower floor's busbar 3 is overlapped in lower floor's busbar 3 it fully, the main body copper bar of busbar except that need with part that power device is connected be coated with insulating barrier; The position that is connected with power device at the upper surface of the lower surface of upper strata busbar 1 and lower floor busbar 3 is welded with copper backing 2.Described copper backing 2 silver soldering are got the tin-coated copper pad of 3～5mm for having connecting hole and thickness on it busbar is connected the part of conducting electricity with power device on.

During concrete the installation, in the employing, the mounting means of following two-layer busbar closed assembly, composite bus bar upper strata busbar 1 and lower floor's busbar 3 appearance profiles are identical, the width of upper strata busbar 1 is than the length of the short busbar thickness of width of lower floor busbar 3, so that upper strata busbar 1 can closely overlap in lower floor's busbar, reach the effect of composite bus bar and can insulate effectively because the insulating barrier of epoxy powder is arranged the busbar surface applied, solved the independently mode of insulating pad that between positive and negative busbar, installs additional in the existing composite bus bar technology, and the anti-shake performance that produces is poor, easily loosening, and make the problem of device integral insulation weak effect.At the outer surface of composite bus bar except that the part of the conduction that need be connected with power device, remainder dipping or spraying epoxy powder, to reach the effect of insulation, its thickness is 1 ± 0.3mm, can well reach the insulation between upper strata busbar 1 and the lower floor's busbar 3.At the position that composite bus bar is connected with power device, electroplate unglazed nickel, it is the copper backing 2 of 3～5mm that the position silver soldering that is connected with power device at the upper surface of the lower surface of upper strata busbar 1 and lower floor busbar 3 has thickness.The part that upper strata busbar 1 and lower floor busbar 3 all are welded with copper backing 2 at relative busbar is done hollow out and is handled, so that busbar copper backing 2 coupling part that connects power devices reveals relatively, can do with power device and is connected.Simultaneously, upper strata busbar part 4 outside soldering copper pads 2 of turning back, the lower floor's busbar part 5 inboard soldering copper pads 2 of turning back are turned back busbar and can be reached same plane when part connects power device.

Claims

1. a novel heat applies the lamination composite bus bar, comprise the busbar that is connected with power device, it is characterized in that: described busbar is the upper and lower two-layer busbar (1,3) of two overlapping installations, described upper strata busbar (1) width is shorter than lower floor's busbar (3) is overlapped in lower floor's busbar (3) it fully, the main body copper bar of busbar except that need with part that power device is connected be coated with insulating barrier.

2. novel heat coating lamination composite bus bar as claimed in claim 1, it is characterized in that: the insulating barrier of described busbar coating is that dipping or coating thickness are the epoxy powder layer of 1 ± 0.3mm.

3. novel heat coating lamination composite bus bar as claimed in claim 1 or 2 is characterized in that: the position soldering copper pad (2) that is connected with power device at the upper surface of the lower surface of upper strata busbar (1) and lower floor's busbar (3); The described busbar part of turning back, upper strata busbar part (4) outside soldering copper pad (2) of turning back, lower floor's busbar part (5) the inboard soldering copper pads (2) of turning back.

4. novel heat coating lamination composite bus bar as claimed in claim 3, it is characterized in that: described copper backing (2) is got the tin-coated copper pad of 3～5mm for having connecting hole and thickness on it.