EP2881963B1 - Entraînement magnétique à relais - Google Patents

Entraînement magnétique à relais Download PDF

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Publication number
EP2881963B1
EP2881963B1 EP13196315.9A EP13196315A EP2881963B1 EP 2881963 B1 EP2881963 B1 EP 2881963B1 EP 13196315 A EP13196315 A EP 13196315A EP 2881963 B1 EP2881963 B1 EP 2881963B1
Authority
EP
European Patent Office
Prior art keywords
armature
relay
permanent magnet
magnetic drive
plate
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.)
Active
Application number
EP13196315.9A
Other languages
German (de)
English (en)
Other versions
EP2881963A1 (fr
Inventor
Kauschwitz Marco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gruner AG
Original Assignee
Gruner AG
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 Gruner AG filed Critical Gruner AG
Priority to EP13196315.9A priority Critical patent/EP2881963B1/fr
Publication of EP2881963A1 publication Critical patent/EP2881963A1/fr
Application granted granted Critical
Publication of EP2881963B1 publication Critical patent/EP2881963B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
    • H01H50/646—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection intermediate part being a blade spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
    • 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
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H2001/265—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support having special features for supporting, locating or pre-stressing the contact blade springs

Definitions

  • the present invention relates to a relay magnetic drive with a umpolbaren magnetic coil with a magnetic circuit, at the two yoke legs a permanent magnet exhibiting armature is pivotally mounted between two end positions, wherein the permanent magnet between two armature plates of the armature is arranged with their projecting beyond the permanent magnet Plate ends abut in the two end positions of the armature respectively at the two yoke legs.
  • a relay with such a relay magnetic drive is for example by the DE 10 2007 011 328 A1 known.
  • the relay magnetic drive is used in a closing or interrupting the circuit between two relay contacts contact spring whose one end of the spring is electrically conductively attached to the first relay contact, the other, free spring end either in a voltage applied to the second relay contact, closed relay position or in a to deflect from the second relay contact lifted, open relay position.
  • relay magnetic drive is in the US-A-2013/229246 disclosed.
  • the inventive taper of the protruding anchor plate ends causes a bunching of the magnetic field lines, which leads to a higher holding force between the anchor plate and yoke legs.
  • the drive characteristic can be increased sufficiently enough without having to use expensive rare earth materials for the permanent magnet.
  • the end face of the anchor plates is in each case at most half as large as the cross-sectional area of the non-tapered middle plate region of the anchor plates.
  • the anchor plates with their non-tapered central plate region can partially protrude beyond the permanent magnet.
  • thicker armature plates and / or a thicker permanent magnet are preferably used in order to reduce strong stray fluxes and thus allow the magnetic flux to flow mainly through the center of the armature plates.
  • the thickness ratio of anchor plate to permanent magnet is at least 45%.
  • the plate ends each taper over two planar inclined surfaces, which continue up to the end face.
  • the plate ends may, for example, also taper over concave or convex curved surfaces.
  • the invention also relates to a relay having at least one contact spring closing or interrupting the circuit between two relay contacts and having a magnetic drive as described above for deflecting the at least one contact spring.
  • Relay 1 shown comprises two relay contacts 2, 3 and a circuit between the two relay contacts 2, 3 closing or interrupting contact spring 4, which is designed as an electrically conductive leaf or flat spring.
  • One end of the contact spring 4 is electrically conductive to the in Fig. 1 fixed upper relay contact 2, while the other, free end 5 carries a contact button 6 and 7 is deflectable by means of a magnetic drive.
  • the contact spring 4 is in the closed relay position ( Fig. 1 a) deflected downwards such that its contact button 6 abuts against a contact button 8 of the lower relay contact 3, and in the open relay position ( Fig. 1b ) so deflected upward that its contact button 6 is lifted from the contact button 8 of the lower relay contact 3.
  • the magnetic drive 7 comprises a umpolbare magnetic coil 9 with a magnetic circuit, at the two yoke legs 10, an armature (armature rocker) 11 with a permanent magnet 12 (FIG. Fig. 2 ) is pivotally mounted.
  • the permanent magnet 12 is arranged between two armature plates 13 , which with their over the permanent magnet 12 projecting plate ends 13 a ( Fig. 2 ) abut each of the yoke legs 10 in the two switching positions of the armature 11.
  • the magnetic coil 9 and the pivotable between its two switching positions armature 11 form a H-anchor suit.
  • the armature 11 has a radially projecting arm 14 which engages under the contact spring 4 in the deflection direction (double arrow 15) with a lower projection 16 and engages over an upper projection 17 .
  • the contact spring 4 in the deflection 15 between the two projections 16, 17 is arranged.
  • an additional leaf spring 18 is attached from spring steel whose free end is overlapped by the upper projection 17.
  • the armature 11 takes with the lower projection 16, the contact spring 4 in the opening direction of the relay 1, ie upwards, and with the upper projection 17 by means of the additional leaf spring 18, the contact spring 4 in the closing direction of the relay 1, ie down, with.
  • the contact spring 4 is coupled to the armature 11 in the opening and closing direction.
  • the contact spring 4 is formed as a multilayer leaf spring with a laterally projecting from its plane arc portion 19 .
  • the magnetic field of the magnetic coil 9 is reversed, whereby the armature 11 is pivoted and thereby the contact spring 4 is deflected.
  • the closed relay position ( Fig. 1a ) is the contact spring 4 deflected by the upper projection 17 of the downwardly pivoted arm 14 down to the contact of their contact button 6 to the contact button 8 of the lower relay contact 3.
  • the contact pressure of the contact button 6 to the contact button 8 of the lower relay contact 3 is given by the pressing force of the leaf spring 18 compressed by the armature 11.
  • the leaf spring 18 counteracts the deflection of the contact spring 4 in the opening direction, resulting in a bounce-reduced closing of the relay 1 leads.
  • the open relay position the contact spring 4 is deflected by the lower projection 16 of the upwardly pivoted arm 14 upwards and thereby the contact button 6 is lifted from the contact button 8 of the lower relay contact 3.
  • the projecting plate ends 13a of the anchor plates 13 taper towards their respective end face 20 and on their longitudinal center plane 21 and on the longitudinal center plane of the armature 11.
  • the anchor plates 11 each have a central plate portion 13b , which may also extend beyond the permanent magnet 12 addition.
  • the plate ends 13a each taper over two planar oblique surfaces 22, which - here, for example only, at about 45 ° - connect to the central plate region 13b and continue up to the end surface 20.
  • the end faces 20 are at most half as large as the cross-sectional area of the central plate portion 13b.
  • the tapered plate ends 13a cause a bundling of the magnetic field lines, which leads to a higher holding force between the armature plate 13 and yoke leg 10.

Landscapes

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

Claims (6)

  1. Entraînement magnétique de relais (7) comprenant une bobine magnétique (9) à polarité réversible avec un circuit magnétique aux deux branches de culasse (10) duquel un induit (11) présentant un aimant permanent (12) est monté pivotant entre deux positions finales, l'aimant permanent (12) étant disposé entre deux plaques d'induit (13) de l'induit (11) qui, dans les deux positions finales de l'induit (11), sont respectivement en contact avec les deux branches de culasse (10) par leurs extrémités de plaque (13a) dépassant de l'aimant permanent (12), les extrémités de plaque (13a) des plaques d'induit (13) s'amincissant en direction de leur surface frontale (20) respective,
    caractérisé en ce
    que, pour focaliser les lignes de champ magnétique, les extrémités de plaque (13a) des plaques d'induit (13) respectivement en contact avec les deux branches de culasse (10) dans les deux positions finales de l'induit (11) s'amincissent en direction de leur plan médian longitudinal (21).
  2. Entraînement magnétique de relais selon la revendication 1, caractérisé en ce que la surface frontale (19) des plaques d'induit (13) est chaque fois au plus égale à la moitié de la surface de section transversale de la zone de plaque médiane non amincie (13b) des plaques d'induit (13).
  3. Entraînement magnétique de relais selon la revendication 1 ou 2, caractérisé en ce que la plaque d'induit (13) dépasse en partie de l'aimant permanent (12) par sa zone de plaque médiane non amincie (13b).
  4. Entraînement magnétique de relais selon l'une des revendications précédentes, caractérisé en ce que le rapport d'épaisseur entre la plaque d'induit (13) et l'aimant permanent (12) est d'au moins 45 %.
  5. Entraînement magnétique de relais selon l'une des revendications précédentes, caractérisé en ce que les extrémités de plaque (13a) s'amincissent chaque fois par deux surfaces obliques (22) qui se prolongent jusqu'à la surface frontale (20).
  6. Relais (1) comportant au moins un ressort de contact (4) fermant ou ouvrant le circuit entre deux contacts de relais (2, 3) et un entraînement magnétique (7) pour dévier ledit au moins un ressort de contact (4) selon l'une des revendications précédentes.
EP13196315.9A 2013-12-09 2013-12-09 Entraînement magnétique à relais Active EP2881963B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13196315.9A EP2881963B1 (fr) 2013-12-09 2013-12-09 Entraînement magnétique à relais

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13196315.9A EP2881963B1 (fr) 2013-12-09 2013-12-09 Entraînement magnétique à relais

Publications (2)

Publication Number Publication Date
EP2881963A1 EP2881963A1 (fr) 2015-06-10
EP2881963B1 true EP2881963B1 (fr) 2017-08-09

Family

ID=49725066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13196315.9A Active EP2881963B1 (fr) 2013-12-09 2013-12-09 Entraînement magnétique à relais

Country Status (1)

Country Link
EP (1) EP2881963B1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007011328A1 (de) 2007-03-08 2008-09-11 Gruner Ag Relais
US8823473B2 (en) * 2010-11-30 2014-09-02 Fuji Electric Fa Components & Systems Co., Ltd. Latching relay
CN103295847B (zh) * 2012-03-01 2016-12-07 德昌电机(深圳)有限公司 驱动装置及具有该驱动装置的继电器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2881963A1 (fr) 2015-06-10

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