EP0232728B1 - Elektromagnetisches Relais - Google Patents

Elektromagnetisches Relais Download PDF

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Publication number
EP0232728B1
EP0232728B1 EP87100330A EP87100330A EP0232728B1 EP 0232728 B1 EP0232728 B1 EP 0232728B1 EP 87100330 A EP87100330 A EP 87100330A EP 87100330 A EP87100330 A EP 87100330A EP 0232728 B1 EP0232728 B1 EP 0232728B1
Authority
EP
European Patent Office
Prior art keywords
permanent magnet
armature
relay
pole
coil
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.)
Expired - Lifetime
Application number
EP87100330A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0232728A1 (de
Inventor
Rolf-Dieter Dipl.-Phys. Kimpel
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT87100330T priority Critical patent/ATE55508T1/de
Publication of EP0232728A1 publication Critical patent/EP0232728A1/de
Application granted granted Critical
Publication of EP0232728B1 publication Critical patent/EP0232728B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures

Definitions

  • the invention relates to an electromagnetic relay with an excitation coil, a core arranged within the coil and a yoke which is coupled at one end to a core end and at the other end of which an armature forming a working air gap is mounted with the free core end, and with a permanent magnet , which exerts a restoring force on the armature at least via one pole and which has a negative temperature coefficient of remanence in the order of the temperature coefficient of a ferrite magnet.
  • Such a relay with the usual magnetic circuit structure, that is to say with an angular yoke and a flat armature arranged on the end face in front of the free core end, is known from DE-OS 1 439 210. It is a neutral, monostable magnet system in which the armature is attracted against the restoring force of the permanent magnet for the duration of the excitation and is returned to its rest position when the excitation is switched off by the permanent magnet force.
  • a ceramic magnet is preferably used as the reset means.
  • These magnets which are also referred to as oxide magnets or ferrite magnets, have a relatively large temperature response, namely a temperature coefficient of remanence which is of the order of magnitude of - 2 x 10-3 K- 1 .
  • It is known to use this effect in polarized bistable relays by using this negative temperature coefficient of remanence of the permanent magnet to increase the positive temperature coefficient of the coil resistance is compensated, whereby the response voltage rises less with increasing temperature than with an unpolarized relay (Siemens magazine, 1969, pages 411 to 413).
  • the object of the invention is to provide a relay of the type mentioned, in which a compensation of the response voltage is achieved even with strong self-heating of the coil.
  • this object is achieved in that a compensation spring which counteracts the attraction of the permanent magnet on the armature compensates for part of this attraction and that the permanent magnet is in thermal contact with a heating device forming part of the excitation circuit.
  • a compensation spring is therefore initially provided in order to transfer the known effect of temperature compensation to a neutral magnet system of the type present here.
  • Which portion of the permanent magnetic force must be compensated for in order to achieve the best possible adaptation of the temperature response of the permanent flux forces to the temperature response of the excitation flux force can be calculated from the known physical properties of the coil winding and the permanent magnet material used.
  • the heating device ensures that the permanent magnet is always at the same temperature as the coil winding.
  • this heating device can be the field winding of the relay itself, if it can be ensured by the corresponding relay construction that the permanent magnet is in thermal contact with the field winding. In general, however, the return magnet of the coil will be arranged opposite the armature, so that this thermal contact is not possible without additional construction.
  • a heating resistor on the permanent magnet as the heating device, which is connected in series or parallel to the excitation coil. The type of connection results from the design of the excitation coil, in particular from the voltage used.
  • This heating resistor is of course designed so that it generates a heating similar to the heating of the coil winding on the permanent magnet. In many cases, this heating resistor does not need to be an additional component, since it is desirable in such relays to limit the voltage peaks when the winding inductance is switched off by means of a parallel resistor. This function can be taken over by the heating resistor.
  • one pole of the permanent magnet has a pole piece as an anchor stop and that the second pole of the permanent magnet is magnetically coupled to the core or the yoke via a flux bracket.
  • a switching behavior can be achieved in this case that more or less corresponds to that of a polarized relay.
  • a neutral switching behavior should be ensured , it is recommended that the permanent magnet has a pole piece on each of the two poles and that these two pole pieces are bridged by the armature in the falling state of the armature. This results in a closed permanent magnetic circuit above the armature, which is separate from the excitation circuit.
  • the relay shown in Fig. 1 has an excitation coil 1 with an axially arranged core 2, an angular yoke 3 coupled to a core end and a flat armature 4 which is mounted on the free yoke end and a working air gap with a pole plate seated on the free core end 5 forms.
  • This relay magnet system is usually arranged on a base 6, which is shown in Fig. 1 only as a rectangular outline.
  • the relay naturally has contact elements not shown, for example a contact spring connected to the armature, which cooperates with mating contact elements anchored in the base.
  • the restoring force for the armature is applied by a permanent magnet 7, which forms a stop for the rest position of the armature 4 with a ferromagnetic pole piece 8 and is magnetically coupled to the core with a second pole piece 9.
  • a permanent magnet 7 which forms a stop for the rest position of the armature 4 with a ferromagnetic pole piece 8 and is magnetically coupled to the core with a second pole piece 9.
  • Part of the permanent flux force is compensated for by a compression spring 10, which is supported on the base or in a similar manner and attempts to press the armature out of its rest position against the attractive force of the permanent magnet.
  • a compression spring 10 By dimensioning this compression spring 10, such a large part of the permanent flux force is compensated that the temperature response of the continuous flux force corresponds approximately to the temperature response of the excitation flux force, so that a largely constant, that is, temperature-compensated response voltage results for the relay.
  • a heating resistor 11 is provided directly on the permanent magnet 7, which is connected in parallel with the winding connections 14 and 15 of the coil 1 via the connections 12 and 13. As long as the coil is energized, the heating resistor 11 is also heated, so that the permanent magnet 7 is heated in synchronism with the coil winding. In this way, the mentioned temperature compensation of the response voltage is ensured in every case.
  • Fig. 2 shows a slight modification of the relay compared to Fig. 1.
  • the basic structure is, however, kept the same, the corresponding parts also being provided with the same reference numerals.
  • a backward-facing poi shoe 19 is used on the permanent magnet 7, this pole piece 19 not being coupled to the core, but rather being designed in such a way that the permanent magnet rests on both pole pieces 8 and 19 in the idle state and then forms a closed permanent magnetic circuit.
  • the neutral switching behavior of the magnet system is not changed by the permanent magnet, but the same temperature compensation as in the embodiment of FIG. 1 is ensured.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Surgical Instruments (AREA)
  • Valve Device For Special Equipments (AREA)
  • Cookers (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Magnetic Treatment Devices (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
EP87100330A 1986-01-16 1987-01-13 Elektromagnetisches Relais Expired - Lifetime EP0232728B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100330T ATE55508T1 (de) 1986-01-16 1987-01-13 Elektromagnetisches relais.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601113 1986-01-16
DE3601113 1986-01-16

Publications (2)

Publication Number Publication Date
EP0232728A1 EP0232728A1 (de) 1987-08-19
EP0232728B1 true EP0232728B1 (de) 1990-08-08

Family

ID=6291963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100330A Expired - Lifetime EP0232728B1 (de) 1986-01-16 1987-01-13 Elektromagnetisches Relais

Country Status (6)

Country Link
US (1) US4728917A (ja)
EP (1) EP0232728B1 (ja)
JP (1) JPS62170122A (ja)
AT (1) ATE55508T1 (ja)
DE (1) DE3764102D1 (ja)
ES (1) ES2017939B3 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3726145C1 (de) * 1987-08-06 1988-11-24 Bosch Gmbh Robert Beschleunigungsaufnehmer,insbesondere zum Ausloesen von Insassenschutzvorrichtungen in Kraftfahrzeugen bei einem Unfall
NL1010974C2 (nl) * 1999-01-06 2000-07-07 Holec Holland Nv Tripsysteem voor een elektrische schakelaar met gunstige kracht-weg-karakteristiek.
DE102004034296B3 (de) * 2004-07-06 2005-06-23 Saia-Burgess Dresden Gmbh Elektromagnetischer Aktuator
EP1962317B1 (de) * 2007-02-23 2009-06-24 Siemens Aktiengesellschaft Elektromagnetisches Schaltgerät
JP6171286B2 (ja) * 2012-08-24 2017-08-02 オムロン株式会社 電磁石装置
DE102014103247A1 (de) * 2014-03-11 2015-09-17 Tyco Electronics Austria Gmbh Elektromagnetisches Relais
CN106328444B (zh) * 2015-06-30 2019-05-10 泰科电子(深圳)有限公司 电磁继电器的磁力系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR972878A (fr) * 1941-05-28 1951-02-05 Perfectionnements aux relais électromagnétiques
US2863103A (en) * 1954-09-24 1958-12-02 W N Borg Corp Relay
US2896132A (en) * 1955-03-07 1959-07-21 Comar Electric Company Electromagnetic relay with spring loaded armature
FR1129189A (fr) * 1955-07-21 1957-01-16 Perfectionnements aux dispositifs électromagnétiques
DE1439210A1 (de) * 1963-01-29 1969-01-09 Siemens Ag Elektromagnet mit beweglichem Anker
US3317871A (en) * 1965-09-20 1967-05-02 Leach Corp Magnetically operated actuator
DE6907840U (de) * 1968-02-27 1972-11-30 Sauer Hans Elektromagnetisches umschaltrelais mit geschuetztem kontaktsystem.
US3522564A (en) * 1968-02-27 1970-08-04 Matsushita Electric Works Ltd Reed relay
DE1902610B1 (de) * 1969-01-20 1969-12-11 Sauer, Hans, 8000 München Elektromagnetisches Relais
JPS5124751A (ja) * 1974-08-23 1976-02-28 Takamisawa Electric Co Chenriree
JPS51110656A (ja) * 1975-03-25 1976-09-30 Omron Tateisi Electronics Co Chensochi
FR2396403A1 (fr) * 1977-07-01 1979-01-26 Mottet Claude Perfectionnements aux relais electromagnetiques excites par de fortes intensites de courant
JPS54129352A (en) * 1978-03-30 1979-10-06 Nippon Telegraph & Telephone Selffretaining relay
JPS59218871A (ja) * 1983-05-27 1984-12-10 Matsushita Electric Works Ltd ドツトプリンタ用電磁石装置
JPS6079632A (ja) * 1983-10-06 1985-05-07 日本電気株式会社 電磁継電器

Also Published As

Publication number Publication date
ATE55508T1 (de) 1990-08-15
US4728917A (en) 1988-03-01
EP0232728A1 (de) 1987-08-19
JPS62170122A (ja) 1987-07-27
DE3764102D1 (de) 1990-09-13
ES2017939B3 (es) 1991-03-16

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