WO2022188984A1 - Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension - Google Patents

Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension Download PDF

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Publication number
WO2022188984A1
WO2022188984A1 PCT/EP2021/056216 EP2021056216W WO2022188984A1 WO 2022188984 A1 WO2022188984 A1 WO 2022188984A1 EP 2021056216 W EP2021056216 W EP 2021056216W WO 2022188984 A1 WO2022188984 A1 WO 2022188984A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact bridge
switch
voltage
webs
bridge device
Prior art date
Application number
PCT/EP2021/056216
Other languages
German (de)
English (en)
Inventor
Thomas Grünhagen
Daniel Fuhrmann
Original Assignee
Pierburg Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pierburg Gmbh filed Critical Pierburg Gmbh
Priority to DE112021007249.8T priority Critical patent/DE112021007249A5/de
Priority to PCT/EP2021/056216 priority patent/WO2022188984A1/fr
Publication of WO2022188984A1 publication Critical patent/WO2022188984A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2008—Facilitate mounting or replacing contact bridge and pressure spring on carrier
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2025—Bridging contacts comprising two-parallel bridges

Definitions

  • the invention relates to a contact bridge device for a switch of a high-voltage contactor or high-voltage relay with an axially movable contact bridge with a first end on which at least one contact is formed and a second end that is radially opposite to the first end, viewed in the direction of current flow of the contact bridge, on which at least one contact is formed is, and an actuator via which the contact bridge is axially displaceable in the direction of mating contacts of the switch.
  • Such contact bridge devices are used in particular in high-voltage contactors that are switched electromagnetically and are used, for example, in motor vehicles in order to be able to safely switch the battery on and off.
  • Such a contact bridge arrangement is known, for example, from DE 10 2015 212 817 A1.
  • This has an actuating member in the form of a rod on which a stop is formed, against which a leaf spring rests, which is pushed against a spacer element at least when the contact bridge arrangement is actuated, on which the contact bridge body rests.
  • this has a contact which, when actuated, is pushed against a corresponding mating contact of the contactor.
  • a levitation force occurs at the contact points Repulsion of the contact bridge from the mating contacts, which must be overcome by the actuating force of the actuator in order to keep the contact in the closed state.
  • the levitation force increases approximately quadratically with the flowing current, which is not a problem for today's vehicles with contactors with a maximum current carrying capacity of up to 6000 A in the event of a short circuit, since the levitation force of approx. 50 N is relatively low and is correspondingly due to the holding force of the magnetic actuator can be compensated.
  • the task therefore arises of creating a contact bridge device with which the effective levitation force can be reduced in order to be able to use smaller magnetic actuators and thus save installation space and costs.
  • the contact bridge device for a switch of a high-voltage contactor or high-voltage relay has an axially movable contact bridge with a first end viewed in the direction of current flow, on which at least one contact is formed.
  • Under current flow direction is understood to mean a direction along which the current flows between the radially opposite contacts when the switch is closed and which in the present case corresponds to a longitudinal direction or main extension direction of the contact bridge.
  • At least one further contact is correspondingly formed at the second end, which is radially opposite, viewed in the direction of current flow.
  • This contact bridge can be displaced axially via an actuating element in the direction of mating contacts of the switch, the axial direction being arranged perpendicularly to the radially directed current flow direction of the contact bridge.
  • the contact bridge has at least three webs which extend parallel to one another in the direction of current flow and at both ends of which a contact is formed and which can be tilted about a tilting axis which is arranged perpendicular to the axis of movement and perpendicular to the direction of current flow of the webs.
  • the webs Due to the possible tilting and mutual twisting of the webs in relation to one another, they can align themselves with the mating contacts in order to produce the largest possible contact surfaces at both ends on the one hand and to increase the number of contact points through the number of webs and thus the existing contacts on the other. If the current is distributed evenly over these total of at least six contacts or three contacts per end, the effective levitation force is theoretically reduced by a factor of 3 when the contacts are in contact with the mating contacts. The number of parallel contact bars can vary between three and seven. Thus, the current causing the levitation force is distributed over a number of contact points and correspondingly reduced per contact area, which also reduces the levitation force. The required holding force for the electromagnet decreases accordingly.
  • the tilting axis is preferably arranged in a plane of symmetry of the webs, which extends perpendicular to the direction of current flow.
  • the contact bridge is prestressed in the direction of the mating contacts by means of a leaf spring element, as a result of which a contact pressure force always acts between the contacts and the mating contact. This leads to a larger contact area.
  • each web is prestressed in the direction of the mating contacts via a spring tongue of the leaf spring element, so that a correspondingly firm contact is made for each of the contacts with the mating contact.
  • Each individual bar can thus be optimally guided as a whole against the mating contact and aligned with the mating contact so that contact is ensured on both sides.
  • the leaf spring element and the webs of the contact bridge are coupled to the actuating member via a coupling element. This simplifies assembly.
  • coupling is to be understood as meaning that, on the one hand, the contact bridge moves when the actuating element is moved, but to a certain extent there can also be a relative movement of the contact bridge or the webs to the actuating element.
  • the leaf spring element has a first end with a number of spring tongues corresponding to the number of webs and a second end with a number of spring tongues corresponding to the number of webs, each against one end of a web of Contact bridge are biased.
  • each web is pressed with its end viewed in the direction of current flow in the direction of the counter-contact and the contact is improved accordingly.
  • a bulge is formed on an end region of the side of the webs facing the spring tongues, with which the webs rest on the spring tongues. In this way, sufficient contact pressure is ensured for both web ends
  • the contact bridge is arranged between the leaf spring element and a limiting element, which rests on the webs with a projection extending along the tilting axis.
  • the limiting element can prevent a displacement of the webs relative to one another or to the actuating element and at the same time fix the tilting axis of the webs.
  • the projection preferably protrudes into a central recess of the webs.
  • the recess always serves as a support for the contact bridge, so that the tilting movement around the support surface also takes place between the projection and the recess. Furthermore, a movement of the webs in the direction of current flow relative to the actuating element is prevented.
  • Direction of movement X is prevented in that side walls extend axially on the delimiting element and are arranged on both sides of the contact bridge when viewed in the direction of the tilting axis. Furthermore, it is advantageous if the coupling element has a bearing surface on which the leaf spring element rests and from which arms extend axially parallel to the side walls of the delimiting element, at the ends of which flakes are formed with which the arms in Direction of current flow of the contact bridge viewed resting centrally on the limiting element. A simple clip fastening of the contact bridge, the leaf spring element and the limiting element to the actuating element is thus produced, with the webs being able to be tilted towards the actuating element.
  • the side walls of the delimiting element are preferably arranged on both sides of the arms of the coupling element, viewed in the direction of current flow, as a result of which a displacement of the delimiting element in the direction of current flow relative to the actuating element can be ruled out.
  • the leaf spring element is slotted in the central area so that spring tongues are formed in the central area, one of the webs of the contact bridge resting prestressed with a central area viewed in the current flow direction on each spring tongue.
  • the pre-tensioning force is introduced centrally. This creates an approximately equal contact force at both ends.
  • each web is loaded individually with its contacts in the direction of the counter-contacts, so that more contact surfaces are created to reduce the levitation force.
  • the webs each have a projection in the central region viewed in the direction of current flow, with which the webs rest on the spring tongues of the leaf spring element and have an opening through which a pin protrudes, which forms the tilting axis.
  • the central support can be produced in a simple manner by means of the projection.
  • the pin forms a fixed, clearly defined axis of rotation around which each bar can be rotated individually and thus aligned with the mating contacts. A displacement in the current flow direction of the webs or of the webs relative to one another can thus be reliably avoided.
  • the opening is designed as a slot extending in the direction of actuation.
  • the coupling element preferably has a bearing surface on which the non-slotted ends of the leaf spring element rest and from which arms extend axially at the two ends of the contact bridge viewed in the direction of the tilting axis, with a bore being formed in each of the arms through which the pin protrudes and in which the pin is fixed.
  • it can have heads at its ends, for example, the diameter of which is larger than the diameter of the bores.
  • the non-slotted ends of the leaf spring element are bent by 180° towards the central region of the leaf spring element.
  • the leaf spring element can rest on a straight plane and still generate a prestressing force on the projections of the webs.
  • a radial projection, on which the coupling element rests, is preferably formed on a rod of the actuating element.
  • the rod can be attached directly to the armature of an electromagnetic actuator, while the projection forms the contact surface for transmitting the actuating force to the contact bridge.
  • the threshold above which a contact detachment occurs in a high-voltage contactor due to the levitation force is shifted towards larger contact bridge currents.
  • the safe operating range of the contactor can be expanded to include larger contact bridge currents, so that it can also be used in purely electrically operated vehicles with high short-circuit currents. This is done by dividing it into different contact points, whose attachment to the mating contacts is ensured by various measures. Accordingly, a contactor with such a contact bridge device can be manufactured inexpensively and requires little installation space.
  • FIG. 1 shows a sectional side view of a high-voltage contactor with a contact bridge device according to the invention.
  • FIG. 2 shows a perspective representation of a contact bridge device according to the invention corresponding to FIG. 1.
  • FIG. 3 shows a side view of the device according to the invention
  • FIG. 4 shows a perspective representation of an alternative contact bridge device according to the invention.
  • the high-voltage contactor 10 shown in FIG present embodiment is arranged between the armature 14 and a switch 20 which can be switched by a movement of the armature 14 .
  • a rod 22 is attached to armature 14 and extends through an opening in core 18 .
  • the rod 22 is part of an actuating member 24, which acts on the switch 20 in that, when the coil 16 is energized, it presses a contact bridge device 26 with its contact bridge 28, at the ends 30, 32 of which contacts 34 are formed, viewed in the longitudinal direction, against counter-contacts 36.
  • the direction of longitudinal extent thus corresponds to a direction of current flow Y in the contact bridge 28. If the coil 16 is not energized, the actuating element 24 and the armature 14 are loaded by a spring 38 in the opposite direction, so that the contact bridge 28 is lifted off the counter-contacts 36 and the circuit is interrupted.
  • the contact bridge device 26 has the contact bridge 28, which according to the invention from side by side arranged webs 40 composed, at the two ends 30, 32 each of the contacts 34 are formed.
  • the webs 40 are arranged individually and independently of one another so as to be rotatable or tiltable about a tilting axis 42 .
  • the tilting axis 42 extends perpendicularly to the axial movement axis of the electromagnetic actuator 12 and to the current flow direction Y or the longitudinal direction of the contact bridge 28 and is arranged in a plane of symmetry of the webs 40 .
  • the webs 40 each have bulges 44 in their end regions, with which they rest on a leaf spring element 46 .
  • the delimiting element 52 extends with a plate 54 at a small distance along a surface of a central region of the webs 40 that faces away from the leaf spring element 46 and has a total of four side walls 56, two of which are located on the two outer webs 40 along axially in the direction of the leaf spring element 46 and thus limit the contact bridge 28 in the transverse direction Z.
  • Two hooks 58 of a coupling element 60 rest on the plate 54, which has a bearing surface 62 on which the leaf spring element 46 rests and from which two arms 64 extend axially between the side walls 56 of the delimiting element 52, at the axial ends of which the hooks 58 resting on the limiting element 52 are formed.
  • the coupling element 60 in turn lies axially with its bearing surface 62 opposite side on a radial projection 65 of the rod 22 and is fixed to the rod 22.
  • the axial distance between the contact surface 62 and the hooks 58 is selected to be slightly smaller than the axial distance between the hooks 58 and the bulges 44 of the webs 40, so that the leaf spring element 46, which is essentially flat, is prestressed against the ends of the webs 40 .
  • the leaf spring element 46 has a number of spring tongues 68 at both ends 66, 67 that corresponds to the number of webs 40, so that each web 40 is prestressed in the direction of the mating contacts 36 via its own spring tongue 68.
  • the webs 40 then align themselves individually with the counter-contacts 36 due to the preload, in that they are individually tilted around the projection 50 in such a way that both ends and thus the two contacts 34 at the ends are pressed against the counter-contacts 36 . Unevenness and dimensional deviations, in particular non-parallelism, are thus compensated and correspondingly ten contact surfaces are created in the case of the five webs 40 arranged next to one another, which leads to lower levitation forces, since the current per contact surface falls.
  • FIG. 3 shows an alternative contact bridge device 26 according to the invention, the same reference numbers being used for the same components.
  • This contact bridging device 26 has webs 40 with a central region 70 viewed in the direction of current flow Y, which is designed as a projection 72 with which the webs 40 rest on the leaf spring element 46 .
  • this central area 70 there is an opening 74 designed as an axially extending elongated hole formed through which engages a pin 76 which is fixed at both ends in a bore 78 in the arms 64 of the coupling element 60 by the pin 76 having at its ends heads 80 which are larger than the bores 78 so that the pin 76 cannot be displaced in the transverse direction Z through the two bores 78 or in the elongated holes of the webs 40 .
  • this pin 76 forms the axis of rotation or tilting 42 about which the webs 40 can be rotated or tilted.
  • the leaf spring element 46 has a central slotted area 82 which forms individual spring tongues 68 and on which the projection 72 of the webs 40 rests, so that here too each web 40 is prestressed centrally by its own spring tongue 68 .
  • Non-slotted outer ends 84 of the leaf spring element 46 are bent through 180° to the slotted area 82 and rest on the bearing surface 62 of the coupling element 60 .
  • the number of tongues, spring tongues and webs can be between three and seven.
  • individual coil springs acting on both sides could also be used instead of the leaf spring elements, with the use of the leaf spring elements being significantly more cost-effective.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)

Abstract

L'invention concerne des dispositifs de pont de contact (26) pour des commutateurs (20) de contacteurs à haute tension (10) ou des relais haute tension, comprenant un pont de contact mobile axialement (28) ayant une première extrémité (30) au niveau de laquelle au moins un contact (34) est formé et, vue dans la direction de circulation du courant (Y) du pont de contact (28), une seconde extrémité (32) qui est radialement opposée à la première extrémité (30) et au niveau de laquelle au moins un contact (34) est formé, et un élément d'actionnement (24) par l'intermédiaire duquel le pont de contact (28) est axialement mobile dans la direction des contacts de couplage (36) du commutateur (20). L'objectif de l'invention est de réduire la force de lévitation et, par conséquent, de pouvoir utiliser des actionneurs plus petits. A cet effet, le pont de contact (28) comprend au moins trois pièces de connexion (40) qui s'étendent dans la direction de circulation de courant (Y), sont disposées de manière adjacente et en parallèle, à chacune des deux extrémités (30, 32) auxquelles un contact (34) est formé, et qui sont inclinables autour d'un axe d'inclinaison (42) qui est perpendiculaire à l'axe de déplacement (X) et perpendiculaire à la direction de circulation du courant (Y) des pièces de connexion (40).
PCT/EP2021/056216 2021-03-11 2021-03-11 Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension WO2022188984A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112021007249.8T DE112021007249A5 (de) 2021-03-11 2021-03-11 Kontaktbrückenvorrichtung für einen schalter eines hochvoltschützes oder hochvoltrelais
PCT/EP2021/056216 WO2022188984A1 (fr) 2021-03-11 2021-03-11 Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2021/056216 WO2022188984A1 (fr) 2021-03-11 2021-03-11 Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension

Publications (1)

Publication Number Publication Date
WO2022188984A1 true WO2022188984A1 (fr) 2022-09-15

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Family Applications (1)

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PCT/EP2021/056216 WO2022188984A1 (fr) 2021-03-11 2021-03-11 Dispositif de pont de contact pour un commutateur d'un contacteur haute tension ou d'un relais haute tension

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Country Link
DE (1) DE112021007249A5 (fr)
WO (1) WO2022188984A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4184542A4 (fr) * 2020-07-31 2023-09-13 Huawei Digital Power Technologies Co., Ltd. Dispositif de contact, commutateur électromagnétique, chargeur embarqué et nouveau véhicule d'énergie

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162952A1 (fr) * 1984-03-31 1985-12-04 Square D Company (Deutschland) Gmbh Pont de commutation pour appareils de commutation électriques, notamment pour contacteurs
EP2290672A1 (fr) * 2009-08-24 2011-03-02 Siemens Aktiengesellschaft Agencement de contact pour commutateurs auxiliaires électromécaniques
EP3116015A1 (fr) * 2015-07-08 2017-01-11 TE Connectivity Germany GmbH Agencement de pont de contact pour un élément de commutation électrique
AU2016336689A1 (en) * 2015-10-10 2018-04-19 Sooar (Beijing) Investment Management Group Co., Ltd. Contact system and contactor comprising contact system
EP3591684A1 (fr) * 2018-07-04 2020-01-08 Gruner AG Relais à pont d'amortissement des chocs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0162952A1 (fr) * 1984-03-31 1985-12-04 Square D Company (Deutschland) Gmbh Pont de commutation pour appareils de commutation électriques, notamment pour contacteurs
EP2290672A1 (fr) * 2009-08-24 2011-03-02 Siemens Aktiengesellschaft Agencement de contact pour commutateurs auxiliaires électromécaniques
EP3116015A1 (fr) * 2015-07-08 2017-01-11 TE Connectivity Germany GmbH Agencement de pont de contact pour un élément de commutation électrique
DE102015212817A1 (de) 2015-07-08 2017-01-12 Te Connectivity Germany Gmbh Kontaktbrückenanordnung für ein elektrisches Schaltelement
AU2016336689A1 (en) * 2015-10-10 2018-04-19 Sooar (Beijing) Investment Management Group Co., Ltd. Contact system and contactor comprising contact system
EP3591684A1 (fr) * 2018-07-04 2020-01-08 Gruner AG Relais à pont d'amortissement des chocs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4184542A4 (fr) * 2020-07-31 2023-09-13 Huawei Digital Power Technologies Co., Ltd. Dispositif de contact, commutateur électromagnétique, chargeur embarqué et nouveau véhicule d'énergie

Also Published As

Publication number Publication date
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