CN201408759Y

CN201408759Y - IGBT power module

Info

Publication number: CN201408759Y
Application number: CN2009201317070U
Authority: CN
Inventors: 盛小军; 曾建友
Original assignee: Shenzhen Hopewind Electric Co Ltd
Current assignee: Shenzhen Hopewind Electric Co Ltd
Priority date: 2009-05-07
Filing date: 2009-05-07
Publication date: 2010-02-17
Anticipated expiration: 2019-05-07

Abstract

The utility model relates to an IGBT power module comprising an underframe, a DC filtering electrolytic capacitor, an IGBT module, an IGBT radiator, a positive DC Bus copper bar and a negative DC Buscopper bar connecting the DC filtering electrolytic capacitor and the IGBT module, as well as a flaky insulating piece positioned between the positive DC B us copper bar and the negative DC Bus copperbar, an IGBT drive board connected on the IGBT module and an AC lead-out copper bar, wherein, the IGBT radiator is fixed on the underframe, the IGBT module is arranged on the upper side of the IGBT radiator, and the DC filtering electrolytic capacitor is fixed on the underframe adjacent to the air inlet of the IGBT radiator. The utility model improves the heat dissipation condition of the DC filter electrolytic capacitor and reduces the stray inductances between the DC filtering electrolytic capacitor and the DC end of the IGBT module, thereby prolonging the service life of the DC filtering electrolytic capacitor, reducing the IGBT switching overvoltage, and ensuring long-term safe and reliable operation of power supply equipment.

Description

A kind of IGBT power model

Technical field

The utility model relates to a kind of power model, particularly a kind of IGBT power model.

Background technology

IGBT (Insulated Gate Bipolar Transistor insulated gate bipolar transistor) power model is to use the normal power module in fields such as frequency converter, wind-force generating converters.Because environment for use is special, wishes IGBT power model compact conformation, become the power model unit of a perfect in shape and function, to satisfy working service requirement easily.

There is following defective on the existing IGBT power model structure:

1, because the volume and weight of intermediate dc electrolytic capacitor filter is bigger, be difficult to DC filtering electrochemical capacitor and main switching device IGBT are installed together on the existing IGBT power model structure, and usually independent the layout, maintenance is made troubles to power model on the one hand, on the other hand, cause the stray inductance between DC filtering electrochemical capacitor and the IGBT element very big, be easy to generate the shutoff overvoltage, cause component wear;

2, under the prerequisite that satisfies IGBT power model compact conformation, existing structure is difficult to take into account the heat radiation of DC filtering electrochemical capacitor and regulates, and causes that DC filtering electrochemical capacitor radiating effect is not good, the life-span reduces, thereby influences the use of entire I GBT power model; If adopt the customization metalized film capacitor to substitute the DC filtering electrochemical capacitor, though solved the problem that the heat radiation of DC filtering electrochemical capacitor is bad, the life-span is short, but brought the not enough and too high new problem of cost of capacitance.

The utility model content

The technical problems to be solved in the utility model is, a kind of IGBT power model is provided, when satisfying compact conformation, convenient for maintaining, solve the defective that prior aries such as the shutoff overvoltage, the heat radiation of DC filtering electrochemical capacitor that have the IGBT power model now and exist are bad, the life-span is short exist.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of IGBT power model, comprise that underframe, DC filtering electrochemical capacitor, IGBT module, IGBT radiator, the positive direct-current Bus copper bar that connects described DC filtering electrochemical capacitor and described IGBT module and negative DC B us copper bar, the sheet insulating part between described positive direct-current Bus copper bar and described negative DC B us copper bar, the IGBT drive plate that is connected on the described IGBT module draw copper bar with exchanging; It is characterized in that described IGBT radiator is fixed on the described underframe, described IGBT module arrangement is at described IGBT radiator upside, and the air inlet that described DC filtering electrochemical capacitor is close to described IGBT radiator is fixed on the described underframe.

In IGBT power model of the present utility model, described DC filtering electrochemical capacitor be a plurality of and become two row, three row or arrange more and put, described IGBT power model comprises the connection in series-parallel copper bar that connects described DC filtering electrochemical capacitor, and described sheet insulating part is between described positive direct-current Bus copper bar and described negative DC B us copper bar, described connection in series-parallel copper bar.

In IGBT power model of the present utility model, described positive direct-current Bus copper bar comprises the hole of the corresponding attachment screw head that exposes described negative DC B us copper bar and described connection in series-parallel copper bar.

In IGBT power model of the present utility model, described IGBT module is a capillary formula IGBT module, and described IGBT power model comprises the IGBT gate pole add-in card that is connected described IGBT module dc terminal positive and negative end.

In IGBT power model of the present utility model, comprise the noninductive absorption electric capacity that is connected described IGBT module dc terminal positive and negative end.

In IGBT power model of the present utility model, described IGBT module dc terminal lays respectively at the module two ends with exchanging to hold, the contiguous described DC filtering electrochemical capacitor of described IGBT module dc terminal, the contiguous described IGBT radiator air outlet of interchange end.

In IGBT power model of the present utility model, described IGBT module is that two above in-parallels are arranged at interval.

Implement IGBT power model of the present utility model, compared with the prior art, its beneficial effect is:

1. the DC filtering electrochemical capacitor is arranged in the air inlet place that is positioned at the IGBT radiator, the intake airflow that makes full use of radiator improves the heat radiation of DC filtering electrochemical capacitor, greatly reduce the DC filtering electrochemical capacitor temperature, can prolong life-span of electrochemical capacitor, guarantee the operation reliably and with long-term of equipment;

2. in design to dwindle the distance that is connected between DC filtering electrochemical capacitor and the IGBT module dc terminal to greatest extent, be reduced to the stray inductance between DC filtering electrochemical capacitor and the IGBT element minimum, reduce to turn-off overvoltage, guarantee the device security reliability service;

3. unifications such as DC filtering electrochemical capacitor and IGBT radiator are fixed on and become one on the underframe, this modular construction design can reduce maintenance difficulties greatly, save preventive maintenance time and cost.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the stereogram of a kind of embodiment of the utility model IGBT power model.

Fig. 2 is the structural perspective after the utility model IGBT power model removes positive direct-current Bus copper bar 3.

Embodiment

As shown in Figure 1, IGBT power model of the present utility model comprises underframe 1, DC filtering electrochemical capacitor 2, IGBT module 9, IGBT radiator 11, the both positive and negative polarity of DC filtering electrochemical capacitor 2 and IGBT module 9 is connected with negative DC B us copper bar 4 with positive direct-current Bus copper bar 3 respectively, adopt sheet insulating part 5 (as insulating paper, polyester film, sheet asbestos etc.) to insulate between positive direct-current Bus copper bar 3 and the negative DC B us copper bar 4, the noninductive absorption electric capacity 6 of connection, IGBT gate pole add-in card 7, IGBT drive plate 8 are drawn copper bar 10 with exchanging on IGBT module 9.

IGBT radiator 11 is connected on the underframe 1, and IGBT module 9 is arranged in the upside of IGBT radiator 11, and the air inlet place of DC filtering electrochemical capacitor 2 next-door neighbour IGBT radiators 11 is connected on the underframe 1.Like this, IGBT radiator 11 not only dispels the heat to IGBT module 9, and distinguished and admirable also DC filtering electrochemical capacitor 2 cooling of IGBT radiator 11 air inlets improves the radiating condition of DC filtering electrochemical capacitor 2 simultaneously.

As shown in Figure 2, in the present embodiment, DC filtering electrochemical capacitor 2 adopts totally 12 of three rows, adopt connection in series-parallel copper bar 12 to connect between three row's electric capacity, connection in series-parallel copper bar 12 is positioned at positive direct-current Bus copper bar 3 belows, also adopts above-mentioned sheet insulating part 5 to insulate between positive direct-current Bus copper bar 3 and the connection in series-parallel copper bar 12.For the head of screw of avoiding connecting connection in series-parallel copper bar 12 and DC filtering electrochemical capacitor 2 be connected the head of screw of negative DC B us copper bar 4 and DC filtering electrochemical capacitor 2, the hole 31 of above-mentioned head of screw is exposed in the correspondence position setting on positive direct-current Bus copper bar 3.

In other embodiments, DC filtering electrochemical capacitor 2 can adopt two row or multi-row to arrange as required, adopt connection in series-parallel copper bar 12 to connect between every row's electric capacity, and then use positive direct-current Bus copper bar 3 dc terminal of DC filtering electrochemical capacitor 2 with IGBT module 9 to be connected with negative DC B us copper bar 4.

In other embodiments, DC filtering electrochemical capacitor 2 also can adopt single layout, directly adopts positive direct-current Bus copper bar 3 with negative DC B us copper bar 4 dc terminal of DC filtering electrochemical capacitor 2 with IGBT module 9 to be connected.

In the present embodiment, noninductive absorption electric capacity 6 is connected IGBT module dc terminal positive and negative end, reduces Vce (IGBT module C, E pole tension) the due to voltage spikes value of IGBT, further guarantees element safety.In other embodiments, noninductive absorption electric capacity 6 is not set, does not influence the realization of the basic goal of the invention of the utility model.

In the present embodiment, the IGBT gate pole add-in card 7 that is connected IGBT module dc terminal positive and negative end is the corresponding additional structures when adopting capillary formula IGBT module.In other embodiments, when the IGBT module adopted non-capillary formula IGBT module, the function of IGBT gate pole add-in card 7 was integrated in the IGBT drive plate 8, thereby has omitted IGBT gate pole add-in card 7.

As shown in Figure 1, in the present embodiment, adopt three dc terminal and exchange the IGBT module 9 that end lays respectively at the module two ends, the dc terminal adjacent DC electrolytic capacitor filter 2 of IGBT module 9, the air outlet parallel interval of interchange end adjacent I GBT radiator 11 are arranged.Like this, can reduce the distance that is connected of DC filtering electrochemical capacitor 2 and IGBT module 9 dc terminal to greatest extent, reduce the stray inductance between DC filtering electrochemical capacitor and the IGBT element.

In other embodiments, hold when laying respectively at the IGBT module 9 at module two ends, can adopt said structure equally when adopting two or more dc terminal and exchanging.

In other embodiments, when only adopting a dc terminal and exchange end when laying respectively at the IGBT module 9 at module two ends, the dc terminal adjacent DC electrolytic capacitor filter 2 of IGBT module 9, the air outlet parallel interval that exchanges end adjacent I GBT radiator 11 are arranged.

In other embodiments, IGBT module 9 is not limited to adopt the parallel interval mode to arrange, as as required, can adopt and exchange end and be positioned at the IGBT module that module ends, dc terminal are positioned at the module middle part, at this moment, the dc terminal adjacent DC electrolytic capacitor filter 2 of IGBT module is arranged, with the dc terminal of assurance IGBT module and being connected of DC filtering electrochemical capacitor 2 apart from the shortest.When power model adopt exchange more than two end be positioned at module ends, when dc terminal is positioned at the IGBT module at module middle part, the distolateral adjacent DC electrolytic capacitor filter 2 of the direct current of every IGBT module is arranged, front and back head and the tail arranged side by side are successively arranged at interval between each IGBT module, with the dc terminal of assurance IGBT module and being connected apart from the shortest of DC filtering electrochemical capacitor 2.At this moment, the interchange end of each IGBT module is drawn the copper bar connection with satisfying the interchange that connects the needs shape.

Claims

1, a kind of IGBT power model comprises that underframe, DC filtering electrochemical capacitor, IGBT module, IGBT radiator, the positive direct-current Bus copper bar that connects described DC filtering electrochemical capacitor and described IGBT module and negative DC B us copper bar, the sheet insulating part between described positive direct-current Bus copper bar and described negative DC B us copper bar, the IGBT drive plate that is connected on the described IGBT module draw copper bar with exchanging; It is characterized in that described IGBT radiator is fixed on the described underframe, described IGBT module arrangement is at described IGBT radiator upside, and the air inlet that described DC filtering electrochemical capacitor is close to described IGBT radiator is fixed on the described underframe.

2, IGBT power model as claimed in claim 1, it is characterized in that: described DC filtering electrochemical capacitor be a plurality of and become two row, three row or arrange more and put, described IGBT power model comprises the connection in series-parallel copper bar that connects described DC filtering electrochemical capacitor, and described sheet insulating part is between described positive direct-current Bus copper bar and described negative DC B us copper bar, described connection in series-parallel copper bar.

3, IGBT power model as claimed in claim 2 is characterized in that: described positive direct-current Bus copper bar comprises the hole of the corresponding attachment screw head that exposes described negative DC B us copper bar and described connection in series-parallel copper bar.

4, IGBT power model as claimed in claim 1 is characterized in that: described IGBT module is a capillary formula IGBT module, and described IGBT power model comprises the IGBT gate pole add-in card that is connected described IGBT module dc terminal positive and negative end.

5, as the described IGBT power model of one of claim 1 to 4, it is characterized in that: comprise the noninductive absorption electric capacity that is connected described IGBT module dc terminal positive and negative end.

6, as the described IGBT power model of one of claim 1 to 4, it is characterized in that: described IGBT module dc terminal lays respectively at the module two ends with exchanging to hold, the contiguous described DC filtering electrochemical capacitor of described IGBT module dc terminal, the contiguous described IGBT radiator air outlet of interchange end.

7, IGBT power model as claimed in claim 6 is characterized in that: described IGBT module is that two above in-parallels are arranged at interval.