EP0217015A1 - Relais électromagnétique - Google Patents

Relais électromagnétique Download PDF

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Publication number
EP0217015A1
EP0217015A1 EP86109472A EP86109472A EP0217015A1 EP 0217015 A1 EP0217015 A1 EP 0217015A1 EP 86109472 A EP86109472 A EP 86109472A EP 86109472 A EP86109472 A EP 86109472A EP 0217015 A1 EP0217015 A1 EP 0217015A1
Authority
EP
European Patent Office
Prior art keywords
armature
pole
permanent magnet
permanent magnets
pole piece
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Withdrawn
Application number
EP86109472A
Other languages
German (de)
English (en)
Inventor
Bernhard Dietrich
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.)
SDS RELAIS AG
Panasonic Electric Works Europe AG
Original Assignee
Euro Matsushita Electric Works AG
SDS RELAIS 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 Euro Matsushita Electric Works AG, SDS RELAIS AG filed Critical Euro Matsushita Electric Works AG
Publication of EP0217015A1 publication Critical patent/EP0217015A1/fr
Withdrawn legal-status Critical Current

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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
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil

Definitions

  • the invention relates to an electromagnetic relay of the type specified in the preamble of claim 1.
  • Such a relay is known from European patent application, publication no. 62332.
  • There two yokes are provided, which abut the two pole faces of a permanent magnet which runs parallel to the coil axis and which is magnetized transversely thereto, and which in turn form two mutually facing pole faces at one end, between which the free end of the armature can be moved back and forth.
  • the opposite end of the armature is mounted on a second leg, which is formed on the other end of one of the two yokes.
  • both yokes are provided with legs at the other end and the armature is mounted between these two legs.
  • the difficulty arises that the soft magnetic armature with its bearing end between the legs of the two yokes causes a magnetic short circuit of the permanent magnet which is also between the two yokes. If the short-circuit effect is reduced, for example, by inserting non-magnetic bearing elements between the legs of the yokes and the relevant end of the armature, the magnetic contact resistance at this end of the armature is increased and the magnetic efficiency is thus reduced.
  • the invention has for its object to design a relay of the type mentioned in such a way that a high magnetic efficiency is achieved even with bistable design.
  • the anchor is not magnetically coupled to either of the two outer yokes, the ones Form pole faces, between which the free end of the armature can be moved back and forth. Rather, the supported end of the armature is magnetically coupled to a third yoke, which separates two individual permanent magnets arranged between the two outer yokes and magnetized in the same direction. This avoids a magnetic short circuit of the permanent magnets.
  • the coupled end can be coupled to the pole piece coupled to the central yoke without an air gap.
  • the tightening force and thus the contact force that can be achieved by the permanent magnet arrangement, is generated by one of the two permanent magnets in each stable end position of the armature.
  • both permanent magnets work together, one exerting a repulsive force and the other exerting an attractive force on the armature.
  • the electromagnetic relay shown in the drawing has a coil body 11 arranged on a base plate 10 with a coil 12 and a continuous bore 13 running in the axial direction of the coil.
  • the ends of the coil 12 are connected to coil connections 14, 15 running through the base plate 10.
  • An armature 16 passing through the bore 13 of the coil former 11 is in accordance with FIG 1 left end protruding from the bore 13 in an essentially U-shaped pole piece 17 and with its free end according to FIG. 1 right end passes through an actuation card 18 which has a slot 19 near its end shown in FIG. 1 above.
  • a contact spring 20 is suspended, the fixed end of which is connected to a contact connection 21 and the free end of which carries contact pieces 22 which cooperate with corresponding contact pieces of two fixed contacts 23, 24.
  • the magnet system of the relay according to FIG. 1 has two rod-shaped permanent magnets 25, 26 which are arranged parallel to one another and to the longitudinal axis of the coil 12 and are magnetized in the same direction transverse to this axis. Between the two permanent magnets 25, 26 there is a central yoke 27, on the left end of which, as shown in the drawing, projects upward and forms the U-shaped pole piece 17 supporting the armature 16. An outer yoke 28, 29 bears against the two outer pole faces of the two permanent magnets 25, 26. Pole shoes 30, 31 which are cranked inwards and upwards and which face the free end of the armature 16 are formed on the front end of the two outer yokes 28, 29.
  • the pole faces 32, 33 formed on the pole shoes 30, 31 and facing the armature 16 are chamfered in such a way that the front side surfaces of the armature 16, which can be pivoted about its rear end, each lie flush against these pole faces 32, 33.
  • the two legs of the U-shaped pole piece 17 are provided with inner beveled pole faces 34, 35, which are aligned with the pole faces 32 and 33, respectively.
  • the armature is in a run through during the actual operation of the relay only during the switchover middle position, on the other hand shown in Figure 2 in the stable end position in which its front end abuts the pole piece 31.
  • the contact spring 20 is closed with respect to the fixed contact 24.
  • the armature 16 is held in this position by the permanent magnet 26, the flow of which starts from its N pole via the central yoke 27, the U-shaped pole piece 17, the pole face 35, the armature 16, the pole face 33 of the pole shoe 31 and that outer yoke 29 runs to its S pole.
  • both permanent magnets 25, 26 act upon switching the armature 16 between its two stable end positions, with the repulsive force generated by a permanent magnet via the pole shoe connected to it at the beginning of the switching movement and at the end of this movement that of the one with the other permanent magnet connected pole piece applied pulling force predominates.
  • the contact actuating force present in the respective end position of the armature 16 after the coil 12 has been switched off is essentially only generated by one of the permanent magnets 25, 26 because the air gap between the free end of the armature 16 and the pole shoe coupled to the other permanent magnet is relatively proportional is large and therefore there is no longer any significant repulsive force.
  • FIGS. 1 and 2 A completely symmetrical arrangement of the magnet system with permanent magnets 25, 26 of the same strength is assumed in FIGS. 1 and 2.
  • the relay has a correspondingly symmetrical bistable behavior.
  • Monostable behavior can be achieved without changing the structure in that one of the two permanent magnets 25, 26 is replaced by a component made of soft magnetic material, that is, the armature 16 is directly magnetically coupled to one of the outer yokes 28, 29.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP86109472A 1985-08-05 1986-07-10 Relais électromagnétique Withdrawn EP0217015A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853528090 DE3528090C1 (de) 1985-08-05 1985-08-05 Elektromagnetisches Relais
DE3528090 1985-08-05

Publications (1)

Publication Number Publication Date
EP0217015A1 true EP0217015A1 (fr) 1987-04-08

Family

ID=6277758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86109472A Withdrawn EP0217015A1 (fr) 1985-08-05 1986-07-10 Relais électromagnétique

Country Status (3)

Country Link
EP (1) EP0217015A1 (fr)
JP (1) JPS6237836A (fr)
DE (1) DE3528090C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201007458D0 (en) * 2010-05-05 2010-06-16 Camcon Ltd Electromagnetically operated switching devices and methods of actuation thereof
BE1025465B1 (de) 2017-08-11 2019-03-11 Phoenix Contact Gmbh & Co. Kg Verfahren zum Magnetisieren von mindestens zwei Magneten unterschiedlicher magnetischer Koerzitivfeldstärken

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2348423B2 (de) * 1973-09-26 1975-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Polarisiertes elektromagnetisches Relais
DE2345638C2 (fr) * 1973-04-13 1978-05-18 Hans 8024 Deisenhofen Sauer
EP0062332A2 (fr) * 1981-04-06 1982-10-13 Matsushita Electric Works, Ltd. Relais électromagnétique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3347602A1 (de) * 1983-12-30 1985-07-11 Siemens AG, 1000 Berlin und 8000 München Polarisiertes elektromagnetisches relais

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2345638C2 (fr) * 1973-04-13 1978-05-18 Hans 8024 Deisenhofen Sauer
DE2348423B2 (de) * 1973-09-26 1975-12-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Polarisiertes elektromagnetisches Relais
EP0062332A2 (fr) * 1981-04-06 1982-10-13 Matsushita Electric Works, Ltd. Relais électromagnétique

Also Published As

Publication number Publication date
DE3528090C1 (de) 1986-10-23
JPS6237836A (ja) 1987-02-18

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Inventor name: DIETRICH, BERNHARD