CN206313445U

CN206313445U - The attachment structure and active filter of DC capacitor and IGBT

Info

Publication number: CN206313445U
Application number: CN201621440854.2U
Authority: CN
Inventors: 宁李锋
Original assignee: Shanghai Shape Technology Co Ltd
Current assignee: Shanghai Shape Technology Co Ltd
Priority date: 2016-12-26
Filing date: 2016-12-26
Publication date: 2017-07-07
Anticipated expiration: 2026-12-26

Abstract

The utility model provides the attachment structure and active filter of a kind of DC capacitor and IGBT, including electric capacity board component (1), bus connecting plate (2) and IGBT components (3)；Electric capacity board component (1), bus connecting plate (2) and IGBT components (3) are sequentially connected.Electric capacity board component (1) includes DC capacitor (104), Interface Terminal (102), electric capacity pcb board (101)；Interface Terminal (102) is arranged on electric capacity pcb board (101), and DC capacitor (104) is welded on electric capacity pcb board (101).The utility model has following beneficial effect：The structure of electric capacity and IGBT in the utility model, can reduce the stray inductance between IGBT and DC capacitor, facilitate electric capacity and IGBT to install；All using four layers of PCB, positive bus-bar, bus midpoint and negative busbar all by the way of lamination paving copper, so DC capacitor is to the stray inductance very little between IGBT；The crash rate of IGBT can greatly be reduced after stray inductance is reduced, the loss of IGBT is reduced.

Description

The attachment structure and active filter of DC capacitor and IGBT

Technical field

The utility model is related to active filter field, in particular it relates to the attachment structure of DC capacitor and IGBT and have Source filter.

Background technology

Active filter is parallel in power network, the idle harmonic current source controllable equivalent to, its reactive current and Harmonic current can rapidly follow the change of reactive load electric current harmonic electric current and change, needed for automatic compensation network system Reactive power harmonic, dynamic passive compensation is realized to power system reactive power harmonic, belongs to flexible flexible AC transmitting system (FACTS) important component.

The connection method of DC capacitor and IGBT is very crucial technology in active filter, between DC capacitor and IGBT There is stray inductance on the wire of connection, this stray inductance can produce peak voltage, the bigger spike of stray inductance on IGBT Voltage is bigger.Than larger stray inductance the crash rate increase of IGBT can be caused also to increase the caloric value of IGBT, reduce direct current Stray inductance between electric capacity and IGBT can improve the loss of the reliability reduction IGBT of IGBT.

Utility model content

For defect of the prior art, the purpose of this utility model is to provide the connection knot of a kind of DC capacitor and IGBT Structure and active filter.

A kind of DC capacitor and the attachment structure of IGBT provided according to the utility model, it is characterised in that including electric capacity Board component, bus connecting plate and IGBT components；

Electric capacity board component, bus connecting plate and IGBT components are sequentially connected.

One end of bus connecting plate is connected with electric capacity board component, and the other end of bus connecting plate is connected with IGBT components；

Electric capacity board component includes DC capacitor, Interface Terminal, electric capacity pcb board；Interface Terminal is arranged on electric capacity pcb board, DC capacitor is welded on electric capacity pcb board.

Preferably, electric capacity board component is fastened together by screw and bus connecting plate, and bus connecting plate is by weldering The mode for connecing is fixed on IGBT components.

Preferably, electric capacity pcb board uses four layers of PCB, and top layer is positive bus-bar voltage network, and middle two-layer is in busbar voltage Spot net, bottom is negative busbar voltage network；

Different Interface Terminals corresponds to positive bus-bar voltage network, negative busbar voltage network, busbar voltage mid-point voltage respectively Network.

Preferably, the nut interface on bus connecting plate is fastenedly connected by screw with Interface Terminal；On bus connecting plate Welding pin projection be inserted into the welding hole of IGBT components and be welded to connect.

Preferably, bus connecting plate uses four layers of PCB, and top layer is positive pole line voltage Copper Foil network, and middle two-layer is bus Voltage midpoint Copper Foil network, bottom is negative busbar voltage Copper Foil network, and positive pole is passed through between welding pin projection and nut interface Line voltage Copper Foil network, busbar voltage midpoint Copper Foil network or negative busbar voltage Copper Foil network are connected.

Preferably, IGBT components include being connected with the IGBT pinboards of IGBT；

IGBT pinboards use four layers of PCB, and top layer is positive bus-bar voltage network, and middle two-layer is busbar voltage midpoint net Network, bottom is negative busbar voltage network.

Preferably, electric capacity board component includes the mode connects for screw interface of connection electric capacity pcb board.

According to the utility model provide a kind of active filter, including above-mentioned DC capacitor Yu IGBT connection knot Structure.

Compared with prior art, the utility model has following beneficial effect：

1st, in the utility model electric capacity and IGBT structure, the stray inductance between IGBT and DC capacitor can be reduced, Electric capacity and IGBT is facilitated to install.

2nd, the utility model provide DC capacitor and IGBT attachment structure in all using four layers of PCB, positive bus-bar, mother Line midpoint and negative busbar all by the way of lamination paving copper, so DC capacitor is to the stray inductance very little between IGBT.

3rd, attachment structure of the present utility model can greatly reduce the crash rate of IGBT after stray inductance is reduced, and reduce The loss of IGBT.

Brief description of the drawings

The detailed description made to non-limiting example with reference to the following drawings by reading, other spies of the present utility model Levy, objects and advantages will become more apparent upon：

The entirety perspective view of the DC capacitor that Fig. 1 is provided for the utility model and the attachment structure of IGBT.

Fig. 2 shows for the DC capacitor that the utility model is provided with the stereochemical structure of the electric capacity board component of the attachment structure of IGBT It is intended to.

Fig. 3 shows for the DC capacitor that the utility model is provided with the stereochemical structure of the bus connecting plate of the attachment structure of IGBT It is intended to.

Fig. 4 illustrates for the DC capacitor that the utility model is provided with the stereochemical structure of the IGBT components of the attachment structure of IGBT Figure.

In figure：

1- electric capacity board components

101- electric capacity pcb boards

102- Interface Terminals

103- mode connects for screw interfaces

104- DC capacitors

2- bus connecting plates

201- nut interfaces

203- welds pin projection

3-IGBT components

301-IGBT pinboards

302- welding holes

303- output current terminals

304-IGBT

Specific embodiment

The utility model is described in detail with reference to specific embodiment.Following examples will be helpful to this area Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that to ability For the those of ordinary skill in domain, without departing from the concept of the premise utility, some changes and improvements can also be made. These belong to protection domain of the present utility model.

The utility model provides the attachment structure of a kind of DC capacitor and IGBT, including the connection of electric capacity board component 1, bus Plate 2 and IGBT components 3；Electric capacity board component 1 is fastened together by screw and bus connecting plate 2, and bus connecting plate 2 leads to The mode for crossing welding is fixed on IGBT components 3.

Wherein, electric capacity board component 1 includes DC capacitor 104, Interface Terminal 102, electric capacity pcb board 101, mode connects for screw interface 103；Bus connecting plate 2 is used for middle connection；IGBT components 3 include IGBT and IGBT pinboards.

Interface Terminal 102 connected horizontally, Interface Terminal three are arranged in the rear of electric capacity pcb board 101 described in the utility model , positive bus-bar, negative busbar, bus midpoint are corresponded to respectively, three group interface terminals are arranged on general every piece of electric capacity pcb board by individual one group；It is logical Electric capacity pcb board 101 and the vertical connection of bus connecting plate 2, connection median generatrix connection are realized in the horizontal positioned connection for crossing screw Plate 2 is vertically downward.DC capacitor 104 is vertically welded on electric capacity pcb board 101, in parallel again after connecting two-by-two.Additionally, electric capacity PCB The both sides of plate 101 are respectively arranged one group of mode connects for screw interface 103 two-by-two, the vertical attachment screw connecting interface 103 of screw, for even Connect other pcb boards or structure.

Preferably, electric capacity pcb board 101 uses four layers of PCB, and top layer is positive bus-bar voltage network, and middle two-layer is bus electricity Spot net in pressure, bottom is negative busbar voltage network, and the effect of similar laminated bus is formed by PCB.

The top of bus connecting plate described in the utility model 2 sets corresponding nut interface 201, with electric capacity pcb board 101 The Interface Terminal 102 at rear is connected, and general every piece of capacitor board pcb board 101 connects three pieces of bus connecting plates 2；Under bus connecting plate 2 Side cuts out square welding pin projection 203, carries out vertically profiling for the square welding pore structure with IGBT components 3 and is connected.

Preferably, bus connecting plate 2 uses four layers of PCB, and top layer is positive pole line voltage copper networks, and middle two-layer is bus electricity Pressure midpoint Copper Foil network, bottom is negative busbar voltage Copper Foil network, and 3 welding pins and 3 screw installing holes pass through 3 Copper Foils Network is connected.

IGBT components 3 described in the utility model include IGBT and IGBT pinboards 301.Have IGBT's on IGBT pinboards The welding hole 302 of positive bus-bar, negative busbar, the welding hole of the connection terminal at bus midpoint, also bus connecting plate 2.IGBT passes through The mode of welding is connected with IGBT pinboards 301.

Preferably, IGBT pinboards use four layers of PCB, and top layer is positive bus-bar voltage network, and middle two-layer is busbar voltage Middle spot net, bottom is negative busbar voltage network, and the effect of similar laminated bus is formed by PCB.

Specific embodiment of the utility model is described above.It is to be appreciated that the utility model not office It is limited to above-mentioned particular implementation, those skilled in the art can within the scope of the claims make a variety of changes or change, This has no effect on substance of the present utility model.In the case where not conflicting, the spy in embodiments herein and embodiment Levying arbitrarily to be mutually combined.

Claims

1. the attachment structure of a kind of DC capacitor and IGBT, it is characterised in that including electric capacity board component (1), bus connecting plate And IGBT components (3) (2)；

Electric capacity board component (1), bus connecting plate (2) and IGBT components (3) are sequentially connected；

One end of bus connecting plate (2) is connected with electric capacity board component (1), the other end and the IGBT components (3) of bus connecting plate (2) Connection；

Electric capacity board component (1) includes DC capacitor (104), Interface Terminal (102), electric capacity pcb board (101)；Interface Terminal (102) It is arranged on electric capacity pcb board (101), DC capacitor (104) is welded on electric capacity pcb board (101).

2. the attachment structure of DC capacitor according to claim 1 and IGBT, it is characterised in that electric capacity board component (1) leads to Cross screw and bus connecting plate (2) is fastened together, bus connecting plate (2) is fixed on IGBT components by way of welding (3) on.

3. the attachment structure of DC capacitor according to claim 1 and IGBT, it is characterised in that electric capacity pcb board (101) is adopted With four layers of PCB, top layer is positive bus-bar voltage network, and middle two-layer is spot net in busbar voltage, and bottom is negative busbar voltage net Network；

Different Interface Terminals (102) corresponds to positive bus-bar voltage network, negative busbar voltage network, busbar voltage mid-point voltage respectively Network.

4. the attachment structure of DC capacitor according to claim 1 and IGBT, it is characterised in that on bus connecting plate (2) Nut interface (201) be fastenedly connected with Interface Terminal (102) by screw；Welding pin projection on bus connecting plate (2) (203) it is inserted into the welding hole of IGBT components (3) and is welded to connect.

5. the attachment structure of DC capacitor according to claim 4 and IGBT, it is characterised in that bus connecting plate (2) is adopted With four layers of PCB, top layer is positive pole line voltage Copper Foil network, and middle two-layer is busbar voltage midpoint Copper Foil network, and bottom is negative mother Line voltage Copper Foil network, passes through positive pole line voltage Copper Foil network, mother between welding pin projection (203) and nut interface (201) Line voltage midpoint Copper Foil network or negative busbar voltage Copper Foil network are connected.

6. the attachment structure of DC capacitor according to claim 1 and IGBT, it is characterised in that IGBT components (3) include It is connected with the IGBT pinboards (301) of IGBT；

IGBT pinboards (301) use four layers of PCB, and top layer is positive bus-bar voltage network, and middle two-layer is busbar voltage midpoint net Network, bottom is negative busbar voltage network.

7. the attachment structure of DC capacitor according to claim 1 and IGBT, it is characterised in that electric capacity board component (1) is wrapped Include the mode connects for screw interface (103) of connection electric capacity pcb board (101).

8. a kind of active filter, it is characterised in that including DC capacitor and IGBT any one of claim 1 to 7 Attachment structure.