DE10003696A1 - Tapping device for electric current - Google Patents

Abstract

A removal device (10) for electrical current is proposed with a first (1) and a second contact area (2) and a transmission area (3) for transmitting the electric current between the contact areas, with the removal device (10) increasing the mechanical stability. at least the transmission area (3) is designed such that it forms an essentially hollow profile-like arrangement (6) with the second contact area (2).

Description

The invention relates to a removal device for electri current according to the preamble of claim 1.

At facilities for acceptance and / or transmission elec trical sizes, especially electrical current, are of industrial application and when used in Endpro to make high demands on their products voltage, an electrical quantity, in particular an electrical quantity Electricity to tap as lossless and / or trouble-free as possible or transfer. Furthermore, with their electrical quality good mechanical handling and stability to be guaranteed.

In many areas of application, strip, surface or plat elaborately designed power take-off devices used. These known current collection devices, for. B. in the form of a band, surface or plate-like connecting lug or - tab, are also used to z. B. on a power supply and / or to contact laxative substrate. Point to this these known electrical power take-off devices a first contact area with which the acceptance is Direction to a current supply or discharge area is contacted mechanically and electrically. Furthermore is in the known tapping devices for electrical current a second contact area is provided, which is then in the Application, d. H. also in the finished product, with a power source or sink is electrically connected. To transfer the electric current between the first contact area and the second contact area is a transmission area the known tapping devices for electrical current educated.  

The ohmic losses, especially in the transmission high load currents of a few hundred amperes, as low as possible to keep, were flat or plate-like connecting lugs or connecting lugs. This known decrease However, directions for electrical current are regarding disadvantageous of their mechanical stability.

For example, with so-called power semiconductors, Switching, transmission or acceptance modules - which follow are simply referred to as modules and so-called Should include diode modules or uncontrolled modules - the known tapping devices for high currents a flat and flat conductor substrate, in particular a DCB / AlN substrate, soldered in such a way that they project substantially perpendicularly from the conductor substrate. Then a housing carrying the switching elements is placed on the Arrangement of conductor substrate with soldered current collector put on. To do this, the corresponding housing must be ge appropriate places have slots through which the Tapping devices for electrical current be threaded. Because of their band or plate-like Structure can be damaged when the housing is put on the arrangement of the strip or sheet-like take-off device lines for electric current of the conventional form z. B. by twisting or canceling.

Due to their low mechanical stability, for. B. the Use of machines for the production and final assembly of the modu le is only possible to a very limited extent, especially since the mounting Au tomatoes highly precise and yet with reduced speed must work to increase the error rate due to ver avoid bent or broken contacts.

The invention has for its object a decrease to create direction for electric current, which, esp especially for line semiconductor, switching, transmission  and / or acceptance modules, for transmission and switching of high current or load current can be used and which have increased mechanical stability has.

The task is in a generic acceptance device for electrical current with the characteristic features of the Claim 1 solved. Advantageous embodiments of the invention are subject of the dependent subclaims.

Compared to the known acceptance devices for electrical Current with a first and a second contact area for receiving me and / or delivery of electrical power and a transfer range for transferring electrical current between the first and the second contact area, the transfer a first and a second end region points, which with the first or with the second Kontaktbe richly connected, it is provided according to the invention that at least the transmission area is designed to use the second contact area is essentially hollow to form an arrangement.

So it is a basic idea of the present invention, instead a single band, plate or sheet-like transfer a transmission area see who for himself and / or in cooperation with the two an arrangement or Structure in the form of a hollow profile. Instead of a flat like a ladder, you get a ladder in the shape of an egg Nes hollow profile, which is an open hollow profile z. B. in the form can be a U or in the form of an O. Hollow profiles be sit in comparison to purely band, plate or surface art two-dimensional structures a much higher one Stability, with a particular advantage being that the removal device according to the invention for electrical  Electricity compared to bars or beams with comparatively little material can be formed.

The first and second contact areas can each as primary contact areas for current consumption and / or each because as a secondary contact areas for delivering electrical Electricity or an electrical quantity serve.

In a preferred embodiment of the invention Tapping device for electric current are in the transfer at least a first conductor and a second Head provided. It is particularly advantageous that the at least two heads of the transmission area in the we have substantially the same geometric properties. By providing several conductors in the transmission area is compared to the prior art, in which the plate-like or flat-type power consumption only one at a time has a single current conducting path, a plurality of current conducting because of. On the one hand, this reduces the the current cross-section in each case acting current density, whereby Ohmic losses in the overall route can be reduced. To start but the division of the current path makes one of them Reduction of self-inductance when tapping current or egg ne reduction of the so-called module inductance during installation the current tap in a corresponding module.

By arranging the at least two conductors of the transfer range in a substantially parallel arrangement to each other will further reduce inductance the arrangement reached.

Particularly simpler manufacturing relationships result, if the head of the transmission area essentially have the same geometric properties. Of course you can However, depending on the application, the various heads of the  Transmission range also the respective geometric eigen adapted to the module or the respective application be, e.g. B. with regard to a special to be used Housing or the like.

It is also advantageous if the head of the transmission area essentially plate-shaped and in particular flat ar are trained. Also result with these properties manufacturing conditions are particularly favorable, but special circumstances can be taken into account again, which then deviates from planarity or training in plate form may be necessary.

A particularly simple arrangement results when the Lei ter of the transmission area is essentially rectangular are formed, each with an upper edge region and / or a lower edge area can be provided for the conductors. It is also preferable in terms of production technology that the Head of the transmission area over their course ne have essentially constant strength. This also leads to the fact that in the course of the ladder regarding the Conductor cross section do not result in any ohmic weak points.

It is in the removal device according to the invention for elec electric current further provided that the second contact rich than essentially plate-shaped, especially flat arer, head is trained. This in turn has manufacturing technical advantages, with the standard techni for forming and shaping planar or partially planar or plate-shaped conductor can be used. Also here is again an essentially rectangular shape with the provision of corresponding side edges on the conductor preferred for the second contact area.

A particularly advantageous embodiment of the inventions tapping device for electrical current according to the invention  that the upper edge areas of the ladder of the Transmission range in each case with one of the side channels ten areas of the conductor of the second contact area connected are that the conductors of the transmission area are each one and the walls of the second contact area Cover plate or a top wall of a jointly trained Form hollow profile. It is particularly advantageous if the head of the transmission area in a given Direction are arranged and the conductor of the second contact area substantially in a direction perpendicular to this direction right direction is arranged so that through the transfer supply area and the second contact area essentially a U-profile is formed.

This arrangement therefore ensures that an electri shear current z. B. is picked up by the first contact area and then in parallel over the side walls of a U-profile, which is just from the conductors of the transmission area in plat tenform parallel to each other, to the secondary Contact area, which lower through the corresponding conductor is formed right over the side walls of the U-profile will wear.

The conductors of the transmission area can also be arranged in this way be that overall there is a different profile shape, z. B. the profile of an O, or such that the space in the O or U profile by other, possibly par allelic, head of the transmission area and / or is filled up.

To contact the acceptance device according to the invention for electrical current it is provided that the first con clock area has conductor elements through which the Abnah Measuring device with a conductor, in particular a conductor plate, on a substrate, in particular a DCB / ALN Substrate, or the like, is contactable.  

It is advantageous if the conductor elements of the first Contact area for mechanical contact, in particular are formed by soldering, welding or the like.

In a preferred embodiment, the conductor elements are elements resiliently or elastically deformable to z. B. thermal expansion or mechanical stress during assembly, e.g. B. when putting on a housing or when Contact field. This can advantageously be done by the provision of expansion arches, folds or the same can be realized.

It is particularly advantageous that in each case in the lower edges area of the head of the transmission area min least one conductor element of the first contact area is formed det. This only results from the similarity the head of the transmission area and the design direction of the conductor of the second contact area a symmetry the removal device according to the invention for electrical Current and thus a symmetrical current flow.

The symmetry of the electrical device including the symmetry of the conductor elements of the first con clock range have u. U. manufacturing advantages, because especially when using a symmetrical decrease device for electric current in the above Switching or transmission modules, then also sym metric current-carrying or current-dissipating basic substrate te, e.g. B. in the form of corresponding base plates with a DCB / AlN substrate can be executed. So then it's just a single type of tapping equipment or power take-off to manufacture and keep in stock.

It is also advantageous if the decrease according to the invention Measuring device for electrical current, in particular the Entire of first contact area, transmission area and  second contact area, in one piece and in particular from one be made of uniform material. Then namely can a corresponding number of in a prefabrication process Tapping devices for electric current punched out bent and pre-assembled, so that in this way and also a process that can be fed to automation gives.

For better contacting, it is advantageous that surface areas of the acceptance device, in particular of the first Contact area and / or the second contact area, full are constantly or selectively finished, in particular with silver, nickel, tin, tin-lead or the like.

The invention is based on a schematic Drawing based on preferred embodiments of the Tapping device according to the invention for electrical current explained in more detail. In this show:

Fig. 1A-C are schematic side and top views of a Vorderan- and embodiment of the Invention proper take-off means for electric current,

Fig. 2A-F are schematic and partially sectioned Be TEN and Vorderan- and plan views of various dene mounting states of a semiconductor controlled switching or transmission module using an embodiment of the invention About tragungseinrichtung electric current, and

FIGS. 3A-B are schematic side and front views of a take-off device for the electric power from the prior art.

Fig. 1A shows a schematic side view of an exemplary embodiment of the tapping device 10 according to the invention for electric current.

At a lower first contact area 1 , which is formed by a conductor element 14 a, b with a plurality of expansion or contact arcs 15 a, b, a transmission area 3 formed by conductors 3 a, b and then a second contact area 2 follow. The first contact area 1 is connected to the transmission area 3 at its first end area 4 , which is formed by its lower edge 12 . The second contact area 2 is in contact with the transmission area at its upper end area 5 , which is formed by the upper edges 11 a, b.

FIG. 1B shows the embodiment of Fig. 1A in front of deransicht. From this view it can be seen that the lower end regions 4 and the upper end regions 5 of the transmission region 3 and accordingly the lower edge regions 12 a, b and the upper edge regions 11 a, b of the transmission region 3 are bent or curved into the first contact region and the corresponding ones Transfer conductor elements 14 a, b or into the second contact area 2 .

From Fig. 1B it is also clear that the conductors 3 a and 3 b of the transmission area 3 are arranged parallel and plate-shaped to each other and together with the head of the transmission area 2 form a hollow profile-like arrangement 6 with a hollow profile interior 6 a, which is not filled . The conductor elements 14 a and 14 b are formed symmetrically to each other and extend in a direction that is approximately perpendicular to the surface of the conductor 3 a and 3 b of the transmission area 3 . Also substantially perpendicular to the surfaces of the conductors 3 a and 3 b of the transfer portion 3 of the conductor of the second contact region 2 is arranged. The arrangement of the embodiment of FIGS. 1A-C is thus mirror-symmetrical to the sectional plane shown in FIG. 1B.

Fig. 1C shows a top view of the embodiment of FIGS. 1A and 1B. The side edges or side edge regions 13 a and 13 b of the conductor of the second contact region 2 can be seen here , which are connected to the upper edges 11 a and 11 b of the conductors 3 a and 3 b of the transmission region 3 . A circular bore 16 is located centrally in the conductor of the second transmission area 2 , through which a fastening or a connection can be introduced when it is installed in a housing.

Fig. 2A shows a partially sectioned side view, according to the invention in which three pick-up means 10 assembled for electric current in a precursor of a module 20 reported at their first contact portions 1 on a substrate on a base plate 21 by means of soft soldering. The corresponding substrate can be a DCB / AlN substrate or the like.

Fig. 2B shows the corresponding front view of the Vorstu fe of the module 20 of Fig. 2A. The U-shaped arrangement of the take-off devices 10 according to the invention on the substrate 22 and the base plate 21 of the module 20 can be clearly seen.

FIGS . 2C and 2D show the arrangement of the electrical current take-off devices 10 according to the invention in the module 20 according to FIGS. 2A and 2B, likewise in a schematic and partially sectioned side and front view, but now referring to the arrangement of FIG. 2A and 2B, a housing element 23 has been placed so that the tapping devices 10 according to the invention for electrical current are covered with the exception of the second contact areas 2 and are thus mechanically protected.

In addition, a sliding cover 24 is shown in FIG. 2C, which can be pushed into the housing 23 in the direction of arrow 25 in such a way that the threaded areas 26 of the sliding cover 24 are located exactly under the bores 16 (see FIG. 1C) in the second contact areas 2 the acceptance devices 10 according to the invention for electrical current come to the plant.

Fig. 2E shows the state of the module 20 after the push lid is inserted 24 in the direction of arrow 25 of Fig. 2C in the housing 23 and the threaded portions 26 below the holes 16 of the second contact portions 2 of the collection devices 10 come into abutment.

In Fig. 2F, the state shown in Fig. 2C is shown in plan view. In Figs. 2C, 2E and 2F, each with 27 weils a portion referred to the module 20 in the housing 23, in which there connections for control lines for receiving control signals as well as corresponding control and scarf sliding elements for switching the routes between the various collection devices 10 are located.

In the present example, a load current via contained tene in the range 27 control means, depending on applied control signals, which is received over the designated 1 in Fig. 2F Mo dul 10, depending on the switching state in the region 27 either via the designated 2 or via the with 3 be marked tapping device 10 for electrical current. This means that the load current passes through the second contact area 2 of the tapping device 10 denoted by 1 into the module, via its transmission area 3 and it first contact area 1 is first transferred to the substrate 22 , then from there after passage of the corresponding first contact area 1 , transmission area 3 and second contact area 2 either leave the 2 or 3 designated tapping device 10 for electric current.

The Fig. 3A and B show in the Figs. 1A and B manner analogous to a conventional take-off device 30 for electrical rule stream from the prior art. A first contact area 31 with resilient conductor elements 34 a and 34 b can be seen here. This is followed by a transmission area 33 , which has only a single current conducting path, which is of single-surface design. At the Übertra supply section 33 of this conventional power take-off means 30, a second contact portion 32 connects, wherein 33 and second contact has a material recess 35 is provided in the transition between transmission range section 32 through which the second contact region 32 in the final assembly in a simplified fashion in its End position bent who can, which is rotated by 90 ° to the pre-assembly position shown in FIGS . 3A and B is formed.

Reference list

1

first contact area

2

second contact area

3rd

Transmission range

3rd

a leader

3rd

b Head

4

first end area

5

second end area

6

Hollow profile

6

a hollow profile interior

10th

Acceptance device

11

a upper edge area

11

b upper edge area

12th

a lower edge area

12th

b lower edge area

13

a side area

13

b side area

14

a ladder element

14

b ladder element

15

a expansion arch

15

b Expansion sheet

16

Mounting hole

20th

module

21

Base plate

22

DCB / AlN substrate

23

casing

24th

Slide-in cover

25th

Direction of insertion

26

Threaded element

30th

conventional acceptance device

31

first contact area

32

second contact area

33

Transmission range

34

a ladder element

34

b ladder element

35

Recess

Claims (17)

1. Tapping device for electrical current with:

• - A first and a second contact area ( 1 , 2 ) for receiving and / or delivering electrical current and
• - a transmission area ( 3 ) for transmitting electrical current between the first and the second contact area ( 1 , 2 ),

wherein the transmission area ( 3 ) has a first and a second end area ( 4 , 5 ) which are connected to the first and to the second contact area ( 1 , 2 ), characterized in that at least the transmission area ( 3 ) is designed in this way in order to form a substantially hollow profile arrangement ( 6 ) with the second contact region ( 2 ). 2. Tapping device for electrical current according to claim 1, characterized in that in the transmission area ( 3 ) at least a first conductor ( 3 a) and a second conductor ( 3 b) are provided. 3. Tapping device for electrical current according to claim 2, characterized in that the conductors ( 3 a, 3 b) are directed substantially parallel to each other. 4. Tapping device for electrical current according to one of claims 2 or 3, characterized in that the conductors ( 3 a, 3 b) have substantially matching geometric properties. 5. Tapping device for electrical current according to one of claims 2 to 4, characterized in that the conductors ( 3 a, 3 b) are essentially plate-shaped, in particular planar. 6. Tapping device for electrical current according to one of claims 2 to 5, characterized in that the conductors ( 3 a, 3 b) are substantially rectangular, each with an upper ( 11 a, 11 b) and a lower edge regions ( 12 a, 12 b) are trained. 7. Tapping device for electrical current according to one of claims 2 to 6, characterized in that the conductors ( 3 a, 3 b) of the transmission area ( 3 ) have a substantially constant thickness over their course. 8. Tapping device for electrical current according to one of the preceding claims, characterized in that the second contact region ( 2 ) is designed as a substantially plate-shaped, in particular planar conductor. 9. Tapping device for electrical current according to one of the preceding claims, characterized in that the conductor of the second contact region ( 2 ) is substantially rectangular in shape with side edge regions ( 13 a, 13 b). 10. Tapping device for electric current according to one of the preceding claims, characterized in that the upper edge regions ( 11 a, 11 b) of the conductor ( 3 a, 3 b) of the transmission region ( 3 ) each with one of the side edges regions ( 13 a, 13 b) of the conductor of the second contact region ( 2 ) are connected such that the conductors ( 3 a, 3 b) of the transmission region ( 3 ) side walls and the conductor of the second contact region ( 2 ) form a cover plate of a hollow profile. 11. Tapping device for electric current according to one of the preceding claims, characterized in that the conductors ( 3 a, 3 b) of the transmission region ( 3 ) are arranged in a first direction and that the conductor of the second contact region ( 2 ) in one this first direction is arranged essentially in the vertical direction, so that the transmission area ( 3 ) and the second contact area ( 2 ) essentially form a U-profile. 12. Tapping device for electrical current according to one of the preceding claims, characterized in that the first contact region ( 1 ) has conductor elements ( 14 a, 14 b) through which the tapping device ( 10 ) for electrical current on a conductor, in particular a circuit board, a Sub strat, in particular a DCB / AlN substrate or the like can be contacted. 13. Tapping device for electrical current according to claim 12, characterized in that the Lei terelemente ( 14 a, 14 b) of the first contact area ( 1 ) for me mechanical contact, in particular with by soldering, welding or the like, are formed. 14. Tapping device for electrical current according to one of claims 12 or 13, characterized in that the Lei terelemente ( 14 a, 14 b), in particular by expansion arches or the like, are resiliently or elastically deformable trained. 15. Tapping device for electrical current according to one of claims 12 to 14, characterized in that in each case in the lower edge region ( 12 a, 12 b) of the conductor ( 3 a, 3 b) of the transmission region ( 3 ) in each case at least one conductor element ( 14 a , 14 b) of the first contact area ( 1 ) is provided. 16. Tapping device for electric current according to one of the preceding claims, characterized in that the first contact area ( 1 ), the transmission area ( 3 ) and the second contact area ( 2 ) are formed together in one piece. 17. Tapping device for electric current according to one of the preceding claims, characterized in that surface areas of the tapping device ( 10 ), in particular the first contact area ( 1 ) and / or the second contact area ( 2 ), are completely or selectively surface-coated, in particular with Silver, nickel, tin, tin-lead or the like.