EP0231793B1 - Relais électromagnétique - Google Patents

Relais électromagnétique Download PDF

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Publication number
EP0231793B1
EP0231793B1 EP87100545A EP87100545A EP0231793B1 EP 0231793 B1 EP0231793 B1 EP 0231793B1 EP 87100545 A EP87100545 A EP 87100545A EP 87100545 A EP87100545 A EP 87100545A EP 0231793 B1 EP0231793 B1 EP 0231793B1
Authority
EP
European Patent Office
Prior art keywords
excitation
winding
yoke
relay
armature
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
EP87100545A
Other languages
German (de)
English (en)
Other versions
EP0231793A1 (fr
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 AT87100545T priority Critical patent/ATE78629T1/de
Publication of EP0231793A1 publication Critical patent/EP0231793A1/fr
Application granted granted Critical
Publication of EP0231793B1 publication Critical patent/EP0231793B1/fr
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
    • 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
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/04—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted; for maintaining armature in attracted position, e.g. with reduced energising current

Definitions

  • the invention relates to an electromagnetic relay with an excitation winding that can be connected to a voltage source, a core arranged inside the winding, which forms an excitation flux circuit with an yoke arranged outside the winding and an armature mounted on the yoke and forming an operating air gap with the free core end, with at least one switch contact which can be actuated by the armature and current supply elements for connecting the switch contact to a load circuit fed by the same voltage source.
  • Such a relay is basically known from EP-A-0 065 852, wherein the excitation winding and the load circuit are fed by one and the same voltage source.
  • there is an additional winding on the same core as the field winding which is connected in the opposite direction to the field winding and switches off the relay in the event of an overload.
  • the problem is not addressed there that the excitation voltage drops while the armature is being tightened, as a result of which the armature may no longer be fully tightened and may flutter. Accordingly, the switch contact is then not closed or only closed after repeated interruptions. This problem arises from the fact that the voltage source for the excitation winding of the relay also simultaneously supplies the current for the load circuit, as is the case especially in motor vehicles.
  • a reed switch is also known, in which a compensation winding is provided in addition to the main excitation winding, the latter being connected in the load circuit.
  • This is intended to solve the problem that magnetomotive forces occur between the reeds of the reed switch due to the normally flowing load current, which counteract the contact force generated by the excitation winding.
  • the windings either had to be largely oversized, or the respective relay had to be implemented through additional design or manufacturing measures, such as the use of permanent magnets or Special adjustments, also made functional for the described applications.
  • additional design or manufacturing measures such as the use of permanent magnets or Special adjustments, also made functional for the described applications.
  • the object of the invention is to provide an electromagnetic relay of the type mentioned, which still responds reliably even when the switch-on voltage is reduced, this reliable response being ensured in particular when a high voltage is supplied from the same voltage source due to the excitation winding and the load circuit Inrush current of the load circuit leads to a breakdown of the voltage on the excitation winding.
  • this object is achieved in that at least one of the power supply elements for the switching contact is guided around the yoke in such a way that additional excitation is induced in the same direction as the excitation of the winding.
  • an inrush current in the load circuit which occurs simultaneously with the decrease in the excitation voltage and causes the breakdown of the excitation voltage due to the use of a common voltage source for excitation and load circuit Generation of an additional excitation is used and thus ensures a reliable response of the relay. Since, due to the common voltage source, the inrush current peak coincides directly with the reduction in the excitation voltage, while with the subsequent reduction in the load current to the continuous current, the recovery also Excitation voltage goes hand in hand, a largely uniform excitation can be obtained with the relay according to the invention.
  • the additional excitation generated by the load current can be obtained in a simple constructive manner in that at least one of the current supply elements is wound around the yoke with at least one turn.
  • the winding sense is of course chosen in accordance with the wiring regulations of the relay in such a way that the additional excitation for coil excitation is in the same direction.
  • the effect of additional excitation according to the invention can already be achieved in that a current supply element is passed between the winding and the yoke and thus forms at least part of a turn around the yoke.
  • the relay remains in the energized state even after the voltage at the excitation winding has been switched off and only drops again when there is counterexcitation.
  • Fig. 1 shows the schematic structure of a relay with a core 1, an angular yoke 2 and an armature 3, which together form a ferromagnetic excitation flux circuit.
  • An excitation winding 4 is arranged above the core 1, which can be connected to a DC voltage source 6 via a switch 5 in order to put the relay into operation and to attract the armature 3.
  • a contact consisting of a contact spring 7 connected to the armature and a fixed contact element 8 is switched, whereby a load circuit which is also connected to the voltage source 6 is closed with a load 9.
  • the fixed contact element 8 is usually rigidly anchored in the relay housing and provided with a connecting pin, while the contact spring 7 is generally connected to a corresponding connecting element via a flexible current supply element, for example a strand 10.
  • the current supply element 10 is looped once or twice around the yoke 2 and thus forms a type of additional winding 11 which generates an additional excitation ⁇ I which is dependent on the load current in the excitation flow circuit.
  • the anchor is definitely tightened with it.
  • FIG. 2 shows the timing of the switch-on process for a relay from FIG. 1.
  • the current I, the voltage U B of the voltage source and the excitation ⁇ are plotted on the time axis T. If the switch 5 is closed at the time T1, the full battery voltage U B of, for example, 12 V is present at the excitation winding 4; a corresponding excitation current flows, which generates the excitation ⁇ U with a value of ⁇ O. At time T2, the contact between the contact spring 7 and the fixed contact 8 closes, and a very high inrush current peak flows in the load circuit, which can be up to 200 A for lamps, blocked motors or glow plugs, for example, in a motor vehicle.
  • 3 and 4 in a comparison of two magnet systems shows how the switching behavior can be improved in the sense of the invention by simple design changes.
  • 2 shows a relay coil 21 with an angular yoke 22 and an armature 23, the switching current being supplied to a contact spring 24 connected to the armature via a wire 25, which in turn is electrically and mechanically connected to a current supply plate 26.
  • This current supply plate which forms a plug or solder pin 27 on its underside, is attached to the outside of the yoke 22 in the example of FIG. 3, as a result of which practically no magnetic excitation is caused by the load current in the yoke and in the excitation flow circuit.
  • the current supply plate 26 is attached to the inside of the yoke 22, that is to say is passed between the yoke and the winding, so that this current supply plate 26 together with the strand 25 turns part of a turn around the yoke 22 forms around.
  • the high load current can thus induce additional excitation in the yoke 22, assuming the correct direction of the current.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Relay Circuits (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Surgical Instruments (AREA)
  • Valve Device For Special Equipments (AREA)
  • Cookers (AREA)

Claims (4)

  1. Relais électromagnétique comportant un enroulement d'excitation (4) pouvant être raccordé à une source de tension (6), un noyau (1) disposé à l'intérieur de l'enroulement (4) et qui forme un circuit véhiculant le flux d'excitation, et une culasse (2) disposée à l'extérieur de l'enroulement et une armature (3) montée sur la culasse et formant un entrefer de travail avec l'extrémité libre du noyau, et comportant au moins un contact de coupure (7,8) pouvant être actionné par l'armature ainsi qu'un élément d'alimentation en courant (10) servant à relier le contact de coupure (7,8) à un circuit de charge (9) alimenté par la même source de tension,
    caractérisé par le fait qu'au moins l'un des éléments d'alimentation en courant (10) s'étend jusqu'au contact de coupure (7,8), autour de la culasse, de manière qu'une excitation supplémentaire (QI) soit induite dans cette dernière, dans le sens de l'excitation (QU) de l'enroulement (4).
  2. Relais suivant la revendication 1, caractérisé par le fait qu'au moins l'un des éléments d'alimentation en courant (6) est enroulé, avec au moins une spire (11), autour de la culasse (2).
  3. Relais suivant la revendication 1, caractérisé par le fait qu'au moins l'un des éléments d'alimentation en courant (26,25) s'étend entre l'enroulement d'excitation (21) et la culasse (22).
  4. Relais suivant la revendication 3, caractérisé par le fait qu'une tôle d'alimentation en courant (26), raccordée de façon conductrice à l'armature (23) et à un ressort de contact (24) porté par l'armature, est fixée à la face intérieure, tournée vers la bobine (21), de la culasse (22).
EP87100545A 1986-01-20 1987-01-16 Relais électromagnétique Expired - Lifetime EP0231793B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87100545T ATE78629T1 (de) 1986-01-20 1987-01-16 Elektromagnetisches relais.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3601519 1986-01-20
DE3601519 1986-01-20

Publications (2)

Publication Number Publication Date
EP0231793A1 EP0231793A1 (fr) 1987-08-12
EP0231793B1 true EP0231793B1 (fr) 1992-07-22

Family

ID=6292207

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100545A Expired - Lifetime EP0231793B1 (fr) 1986-01-20 1987-01-16 Relais électromagnétique

Country Status (6)

Country Link
US (1) US4803589A (fr)
EP (1) EP0231793B1 (fr)
JP (1) JPH0746555B2 (fr)
AT (1) ATE78629T1 (fr)
DE (1) DE3780478D1 (fr)
ES (1) ES2033692T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963504C1 (de) * 1999-12-28 2001-10-18 Tyco Electronics Logistics Ag Relais mit Überstromschutz

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040089A (en) * 1986-11-26 1991-08-13 Kabushiki Kaisha Toshiba D.C. relay with power reducing function
DE8808401U1 (de) * 1988-06-30 1988-08-18 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches Lastrelais
AT402579B (de) * 1991-10-07 1997-06-25 Schrack Components Ag Relais
DE102004006710A1 (de) * 2004-02-11 2005-08-25 Tyco Electronics Amp Gmbh Relais und Verfahren zur Herstellung eines Relais
JP5635456B2 (ja) * 2011-06-28 2014-12-03 株式会社ミツバ 電磁継電器
DE102012202084A1 (de) * 2012-02-13 2013-08-14 Siemens Aktiengesellschaft Klappankerlagerung für magnetischen Auslöser

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US549209A (en) * 1895-11-05 Electromagnetic switch
US3238326A (en) * 1964-06-26 1966-03-01 Allis Chalmers Mfg Co Contactor with a load current hold-in feature
GB1123339A (en) * 1966-03-03 1968-08-14 Adrema Ltd Improvements in and relating to magnetic reed contact devices
GB1532107A (en) * 1977-05-19 1978-11-15 Towmotor Corp Electromagnetic contactors
JPS57132627A (en) * 1981-02-09 1982-08-17 Omron Tateisi Electronics Co Magnet relay
US4376271A (en) * 1981-06-18 1983-03-08 Siemens-Allis, Inc. Polarized DC contactors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19963504C1 (de) * 1999-12-28 2001-10-18 Tyco Electronics Logistics Ag Relais mit Überstromschutz

Also Published As

Publication number Publication date
US4803589A (en) 1989-02-07
ATE78629T1 (de) 1992-08-15
ES2033692T3 (es) 1993-04-01
DE3780478D1 (de) 1992-08-27
JPS62172622A (ja) 1987-07-29
JPH0746555B2 (ja) 1995-05-17
EP0231793A1 (fr) 1987-08-12

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