EP3918620A1 - Elektrische kontaktanordnung - Google Patents
Elektrische kontaktanordnungInfo
- Publication number
- EP3918620A1 EP3918620A1 EP20702439.9A EP20702439A EP3918620A1 EP 3918620 A1 EP3918620 A1 EP 3918620A1 EP 20702439 A EP20702439 A EP 20702439A EP 3918620 A1 EP3918620 A1 EP 3918620A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- groove
- mandrel
- electrical
- contact element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
- H01H1/38—Plug-and-socket contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
- H01R13/17—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member on the pin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
- H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
- H01R4/4863—Coil spring
Definitions
- the invention relates to an electrical contact arrangement for separating and connecting the electrical poles of an electrical voltage source to an electrical consumer.
- current paths can be set to be low-inductance, which can ensure a low-resistance / high-current-resistant and tolerance-flexible, electrically conductive connection in multiple contact points.
- It can be used in power electronics, whereby load or auxiliary connection connections are realized via spring elements in order to increase the tolerance flexibility and to reduce the commutation inductance of a power semiconductor module.
- resilient elements are usually used in order to ensure a safe electrical current flow enable.
- the surface topology of the contact surfaces, through which electrical current can flow plays a major role.
- tolerance shifts caused or micro-movements occurring during operation should be taken into account in order to reduce increased or irregular electrical contact resistances.
- Each current-carrying electrical conductor forms a magnetic field which induces an electrical voltage in the surrounding electrical lines of a second electrical pole and counteracts the electrical current flow. This negative effect is determined by the surface of the magnetic field. This also affects the performance of contacted electrical components, which are associated with steep electrical current increases or short switching times to avoid dynamic voltage peaks during a switching operation.
- first contact element and a second contact element which are arranged electrically isolated from one another by means of at least one insulation element or an electrically insulating coating which is formed on the surface of at least one of the contact elements, available.
- An opening is formed in each of the first and second contact elements, into which a first mandrel and a second mandrel can be inserted.
- a groove-shaped recess is formed, in each of which at least one annular spring element, in particular a coil spring, the end ends of which are connected to one another are form-fitting. If a groove-shaped recess is formed both in a mandrel and in an opening in a contact element, a groove-shaped recess of such a pair of recesses should be dimensioned smaller than the other groove-shaped recess.
- annular spring element should be hollow on the inside, in particular cylindrical or also elliptical, with a constant inside and outside diameter over its length and a constant cross section when it is in an unloaded state.
- the annular spring element does not necessarily have to be cylindrical.
- the at least one annular spring element is formed from an electrically conductive and elastically deformable material. Its inner and outer dimensions, in particular the windings of a ringenfe are geometrically designed and dimensioned such that the radially outward and / or the radially inward-facing wall against the surface of the respective dome and the surface of the first and second contact elements in the area act on a respective groove-shaped depression with compressive force when the mandrels are inserted into the openings for producing an electrically conductive connection.
- the first electrical contact element or the first mandrel is connected to a pole of an electrical voltage source and the second electrical contact element or the second mandrel to the other pole of the electrical voltage source.
- the respective mandrel or the respective electrical contact element which / which is not connected to the electrical voltage source, can be electrically conductively connected to a pole of an electrical consumer.
- the groove-shaped depressions should be dimensioned such that a spring compression of at least 10%, preferably of at least 20% and at most SO% compared to the original state of the annular spring element is achieved when the mandrels are inserted into the openings in the first and second contact elements.
- the annular spring elements can thus be deformed elliptically.
- compressive forces can act between surfaces of the electrical contact elements and the mandrels, so that a safe electrical current flow can be achieved via the electrical contact elements, the ring-shaped spring elements and the mandrels, since even with mechanical, in particular vibrating loading, the ring-shaped spring elements are temporarily lifted off, especially the turns of coil springs from the respective surfaces used for the electrical conduction can be safely avoided.
- annular spring elements can be in contact with the surface of at least one groove-shaped depression and an oppositely arranged surface at any time, thus ensuring a low-resistance current flow.
- the usable contact area for the electrical current flow can also be enlarged.
- the contact forces acting there can also compensate for roughness peaks on the surfaces.
- the groove-shaped depressions should advantageously be concave, trapezoidal or V-shaped.
- the choice of the radius of the respective groove-shaped recess should take into account the shape and dimensioning of the respective compressed annular spring element when the electrical contact arrangement is in a state in which an electrical current flow takes place via the two annular spring elements.
- the concave, trapezoidal or V-shaped groove increases the surface that can be used for an electrical current flow. It also supports mechanical locking. Regardless of the depth of radius chosen, at least one contact point, which is advantageous, since flat contacts in practice require contact forces that cannot normally be implemented technically or require very high assembly forces. Although there is actually only one contact point, contact fingers are formed through elastic material deformation in the area of many roughness peaks on the surface, via which an electrical current can flow. Flat contacts require contact forces that are not feasible in practice. Due to elastic material deformation when one or more contact points are made, a circular cross-section with a large number of contacting roughness peaks can be formed. In particular when training nu-shaped recesses in V-groove form, there are several contact points. It can also shorten the path for electrical current flow.
- a groove-shaped depression can be formed in the region of the inner lateral surface of the opening in the first contact element.
- a groove-shaped depression can also be formed on a surface of the first electrical contact element, which is arranged in the direction of a circumferential flange which is formed on the first mandrel.
- a groove-shaped depression can also be present on a surface of a flange which is part of the first dome and this surface is arranged in the direction of a surface of the first electrical contact element.
- a deformation of the annular spring elements arranged in the correspondingly arranged groove-shaped recess can, as explained above, by maintaining a corresponding force effect on the first mandrel, which axially presses against the corresponding surface of the first electrical contact element, or alone due to gravity due to the dead weight of the first dome he will be enough.
- One or more helical spring (s) which can be axially tilted or already tilted during manufacture can be inserted as annular spring elements in the groove-shaped depression (s). It is also possible to use screw springs with an oval shape for their turns. In the event that a groove-shaped recess is formed both in a mandrel and in an opening in a contact element, one of the groove-shaped recesses of such a pair of recesses can be dimensioned smaller than the other groove-shaped recess.
- a mandrel can be made in one piece from a solid material, but also as a hollow cylinder.
- An insulation element can be designed in the form of a sleeve or socket on which there is a flange pointing radially outward.
- the respective sleeve can be arranged between the outer lateral surface of at least one of the mandrels and the inner lateral surface in the region of one of the two contact elements and the flange can be arranged between the first and second contact element.
- the mandrels and the openings formed in the contact elements should have a complementary cross-sectional geometry. This can be rotationally symmetrical, elliptical or polygonal, for example.
- the annular spring elements can adapt to the respective geometry because of their elasticity.
- At least one of the mandrels can be in the form of a sleeve or socket, that is to say hollow inside, in particular hollow cylindrical, into which the other mandrel and the sleeve-shaped region of the insulation element can be inserted.
- the dimensions and geometric design of the openings and of the at least one insulation element should be chosen such that the spikes can be moved in a translatory manner within electrical openings or a sleeve-shaped insulation element during electrical switching operations under electrical load. Tilting should be avoided as far as possible and a sufficient compressive force effect, which would enable a corresponding deformation of the annular spring elements during an electrical current flow through the annular spring elements, is sufficient.
- the two mandrels can be moved individually or together in translation.
- a first mandrel can form an inner conductor and the second mandrel can form an outer conductor.
- the electrical current flow can be based on the number of turns, the angle of inclination of the turns, the width and height of the respective turn window and their ratio of its diameter or its
- Cross-sectional area size the material with which the respective coil spring is formed and whether the surface of the spring material is modified or is refined and accordingly that of the contact points as well as the respective winding window of the coil springs and the cross-sectional area of the turns (wire thickness) are influenced.
- the respective spring compression can be selected within a compression range of the characteristic spring characteristic of the respective annular spring element, which compression range is flexible, as can be seen in FIG. 6.
- the turns of a helical spring in particular, can be tilted as an annular spring element until it has reached approximately the center of the tolerance range.
- the ring-shaped spring elements consist of a metal or an electrically conductive material.
- the spring material one should take into account the electrical conductivity and the spring constant.
- CuCrZn or CuBe 2 can be preferred.
- annular spring elements that are subjected to high mechanical stress these can be formed from or with a stainless steel. It is particularly advantageous to coat the surface in order to avoid or at least hinder oxidation. This can be achieved, for example, with gold, silver, nickel or tin layers.
- the electrical contact elements are also electrically conductive and can be made of a suitable metal, for example copper.
- An insulation element can be formed from a polymer or an electrically non-conductive ceramic material.
- Figure 1 shows a first example of a Whyanord invention
- Figure 2 shows a second example of a Whyanord invention
- Figure 3 shows a third example of a contact arrangement according to the invention
- Figure 4 shows a fourth example of a contact arrangement according to the invention.
- Figure 5 shows a fifth example of a contact arrangement according to the invention.
- Figure 6 is a diagram from which you can see a tolerance field in the compression of coil springs.
- annular electrical contact element 1 is connected in a form not shown to a pole of an electrical voltage source.
- a bore is formed as an opening, into which a first mandrel 4 is inserted with play. It forms the inner conductor.
- a groove-shaped depression is formed on the outer lateral surface of the first dome 4, into which a groove is formed on the end faces.
- interconnected coil spring is used as an example of an annular spring element 6.1 and is held in a form-fitting manner.
- the groove-shaped recess is dimensioned such that the helical spring 6.1 is held securely and is compressed by means of the inner circumferential surface of the first contact element 1 in the area of the opening so that compressive forces between the turns of the helical spring 6.1 and the corresponding surfaces of the first contact element 1 and the first mandrel 4 act and the helical spring 6.1 has been deformed elliptically.
- the turns of the helical spring 6.1 can also be tilted sideways.
- the electrically conductive connection can also be separated if the first contact element 1 is moved in a translatory manner such that there is no contact with the first screw fader 6.1.
- a second contact element 2 is connected to a pole of an electrical voltage source (not shown).
- the second electrical contact element's 2 is also a hole, forms out as an opening.
- a second mandrel 5 with little play can be introduced to establish an electrically conductive connection, which in this example is sleeve-shaped.
- a groove-shaped depression is also formed, into which a helical spring has been inserted as an example of an annular spring element 6.2 analogous to helical spring 6.1. It is also held in a form-fitting manner in the groove-shaped recess. and establishes an electrical current flow between the second electrical contact element 2 and the second mandrel 5 when the second mandrel 5 has been positioned as shown in FIG. 1.
- the electrically conductive connection can alternatively also be achieved by means of a translatory movement of the second contact element 2, which is carried out to such an extent that there is no longer any contact between the second contact element 2 and the helical spring 6.2.
- the electrical con tact elements 1 and 2 can be electrically conductively connected to an electrical consumer and the mandrels 4 and 5 each with a pole of an electrical voltage source.
- the second example shown in FIG. 2 differs from the example according to FIG. 1 in that a second insulation element 3.2 is present. This is also partially sleeve-shaped and provided with a circumferential flange, which forms electrical insulation between the first and second electrical contact elements 1 and 2.
- the sleeve-shaped area of the second insulation element 3.2 forms an electrical insulation between the first electrical contact element 1 and the first mandrel 4 in an area in which no groove-shaped depression is formed.
- a groove-shaped recess for the helical spring 6.1 is in the inner wall of the opening of the first electrical contact element 1 and not on a surface of the first dome 4 and a further groove-shaped recess is in the inner wall of the opening of the second electrical contact element 2 and not on a surface of the second dome 5.
- the fourth example shown in FIG. 4 differs from the example according to FIG. 1 in that two groove-shaped depressions are formed, so that in each case two helical springs 6.1 and 6.2 can be inserted next to and in each case in two groove-shaped depressions, as a result of which the electrical current flows available contact points or surface is enlarged and larger electrical currents can be switched. Radially available installation space can also be better used.
- the groove-shaped depressions can also be made longer, so that in each case a groove-shaped depression two spring springs 6.1 and 6.2 can be used.
- FIG. 5 differs from the example according to FIG. 1 in that an annular groove-shaped depression is formed on a surface of a flange formed all around on the first mandrel 4.
- the corresponding surface points in the direction of a surface of the first electrical contact element 1.
- An axially tiltable or already tilted helical spring 6.1 is inserted into the groove-shaped depression, via which the electrical current flow takes place when the first mandrel 4, as shown in FIG. 5, is positioned has been.
- This electrical current flow can be interrupted when the first mandrel 4 in the form shown here has been moved upwards, ie away from the first electrical contact element 1.
- the electrical current flow can also be interrupted when the second mandrel 5 has been moved until there is no more direct contact between the helical spring 6.2 and the second mandrel 5.
- at least one of the mandrels 4 or 5 can be moved in the breakthrough until there is no contact between the helical spring 6.1 or 6.2 and the first mandrel 4 or second mandrel 5 in order to end the electrical current flow.
- the movement can take place in opposite directions, so that an electrical current can flow via the electrical contact elements 1 and 2, the coil springs 6.1 and 6.2 to the mandrels 4 and 5 or vice versa.
- coil springs 6.1 and 6.2 the turns of which are oval in shape, can be used.
Landscapes
- Measuring Leads Or Probes (AREA)
- Contacts (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019201017 | 2019-01-28 | ||
| DE102019207737.4A DE102019207737B4 (de) | 2019-01-28 | 2019-05-27 | Elektrische Kontaktanordnung für einen ersten Pol und einen zweiten Pol einer elektrischen Spannungsquelle |
| PCT/EP2020/051901 WO2020156990A1 (de) | 2019-01-28 | 2020-01-27 | Elektrische kontaktanordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3918620A1 true EP3918620A1 (de) | 2021-12-08 |
Family
ID=71524675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20702439.9A Withdrawn EP3918620A1 (de) | 2019-01-28 | 2020-01-27 | Elektrische kontaktanordnung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20220190503A1 (de) |
| EP (1) | EP3918620A1 (de) |
| DE (1) | DE102019207737B4 (de) |
| WO (1) | WO2020156990A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7046295B1 (ja) * | 2021-09-29 | 2022-04-01 | 三菱電機株式会社 | 開閉装置のリング状コイルスプリングおよびこれを用いた開閉装置 |
| EP4661041A1 (de) * | 2024-06-03 | 2025-12-10 | Abb Schweiz Ag | Unterwassertrenner |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6895276B2 (en) * | 2002-02-28 | 2005-05-17 | Medtronic, Inc. | In-line lead header for an implantable medical device |
| WO2009072263A1 (ja) * | 2007-12-05 | 2009-06-11 | Mitsubishi Electric Corporation | 接触子装置 |
| US8096838B2 (en) * | 2009-03-11 | 2012-01-17 | Bal Seal Engineering, Inc. | Header assembly for implantable medical devices |
| US20100279558A1 (en) * | 2009-04-29 | 2010-11-04 | Gordon Leon | Electrical contact assemblies with canted coil springs |
| US8167660B2 (en) * | 2009-09-04 | 2012-05-01 | Bal Seal Engineering, Inc. | Connector assemblies for use with implantable medical devices |
| US8382532B2 (en) * | 2010-05-13 | 2013-02-26 | Bal Seal Engineering, Inc. | Insert element engaging a canted coil spring disposed in a groove in a bore formed by two housing parts |
| WO2013142734A1 (en) * | 2012-03-21 | 2013-09-26 | Bal Seal Engineering, Inc. | Connectors with electrical or signal carrying capabilities and related methods |
| US9829028B2 (en) * | 2012-11-15 | 2017-11-28 | Bal Seal Engineering, Inc. | Connectors with a pin, a housing, and one or more springs |
| US10263368B2 (en) * | 2013-06-25 | 2019-04-16 | Bal Seal Engineering, Inc. | Electrical contacts with electrically conductive springs |
| US9806473B2 (en) * | 2015-01-08 | 2017-10-31 | Bal Seal Engineering, Inc. | High frequency miniature connectors with canted coil springs and related methods |
-
2019
- 2019-05-27 DE DE102019207737.4A patent/DE102019207737B4/de active Active
-
2020
- 2020-01-27 US US17/425,781 patent/US20220190503A1/en not_active Abandoned
- 2020-01-27 WO PCT/EP2020/051901 patent/WO2020156990A1/de not_active Ceased
- 2020-01-27 EP EP20702439.9A patent/EP3918620A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019207737B4 (de) | 2020-10-08 |
| DE102019207737A1 (de) | 2020-07-30 |
| WO2020156990A1 (de) | 2020-08-06 |
| US20220190503A1 (en) | 2022-06-16 |
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| RIC1 | Information provided on ipc code assigned before grant |
Ipc: H01R 4/48 20060101ALI20220803BHEP Ipc: H01R 13/17 20060101ALI20220803BHEP Ipc: H01H 1/38 20060101AFI20220803BHEP |
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