EP0042056A1 - Temperature compensation for highly sensitive permanent-magnetic holding relays - Google Patents

Temperature compensation for highly sensitive permanent-magnetic holding relays Download PDF

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Publication number
EP0042056A1
EP0042056A1 EP81103246A EP81103246A EP0042056A1 EP 0042056 A1 EP0042056 A1 EP 0042056A1 EP 81103246 A EP81103246 A EP 81103246A EP 81103246 A EP81103246 A EP 81103246A EP 0042056 A1 EP0042056 A1 EP 0042056A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
temperature compensation
permanent
highly sensitive
magnet
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.)
Granted
Application number
EP81103246A
Other languages
German (de)
French (fr)
Other versions
EP0042056B1 (en
Inventor
Walter Güting
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.)
SCHUPA-ELEKTRO-GMBH and CO KG
Original Assignee
SCHUPA-ELEKTRO-GMBH and CO KG
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 SCHUPA-ELEKTRO-GMBH and CO KG filed Critical SCHUPA-ELEKTRO-GMBH and CO KG
Priority to AT81103246T priority Critical patent/ATE9937T1/en
Publication of EP0042056A1 publication Critical patent/EP0042056A1/en
Application granted granted Critical
Publication of EP0042056B1 publication Critical patent/EP0042056B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/142—Electrothermal mechanisms actuated due to change of magnetic permeability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/32—Electromagnetic mechanisms having permanently magnetised part
    • H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements

Definitions

  • the invention relates to temperature compensation for highly sensitive permanent magnetic latching relays according to the preamble of claim 1.
  • the main design features of such relays consist of a permanent magnet and a magnetic yoke attached to it, as well as an armature and an excitation winding which influences the holding flux of the permanent magnet.
  • a permanent magnet and a magnetic yoke attached to it, as well as an armature and an excitation winding which influences the holding flux of the permanent magnet.
  • To achieve a high sensitivity it is known, among other things, to keep the magnetic air gap as small as possible.
  • the ambient temperature naturally affects the response threshold in such a way that the excitation current increases at high temperatures, which means that the relay responds at a value other than the set value.
  • this is not desirable from the objective of a reliably operating relay of this type, and is often even impermissible from the regulations.
  • the invention is therefore based on the object of making the response threshold of such relays independent of the ambient temperature in the case of a permanent magnetic holding relay according to the preamble of claim 1, or of influencing the magnetic holding flux by the action of temperature.
  • the adhesive relay consists essentially of a magnetic yoke with the two legs 1, 2 and the shunt 3.
  • the armature is referred to, which is biased by a spring 5.
  • An excitation coil 6 is arranged on one of the legs 2.
  • the Magnetjoch. has a permanent magnet 7 in the area of the shunt 3.
  • the thermal alloy 8 according to the invention for compensating the temperature is arranged between the poles "N" and "S" of the permanent magnet 7 and the Magnetjoch shunt 3.
  • the decrease in the magnetic flux ⁇ M by reducing the permanent magnet induction can only increase this compensate slightly.
  • disks 8 made of the proposed material are now inserted into the permanent magnetic circuit, consisting of permanent magnet 7 and magnetic yoke shunt 3, the magnetic resistance of the disks made of thermal alloy will increase continuously to the extent of the temperature increase, so that the magnetic flux ⁇ M of the permanent magnet 7 is reduced accordingly by the magnetic yoke shunt 3.
  • the holding flux ⁇ H in the armature circuit - armature, leg 1, 2, magnetic yoke shunt 3 - is also smaller, so that the original response value is achieved again.
  • the compensating effect of the pane can be precisely adjusted by designing the pane with regard to its thickness and by selecting a suitable thermal alloy, characterized by its Curie point and the slope.

Abstract

1. A high-sensitivity permanent-magnet latching relay with a magnet yoke (1, 2, 3) and a permanent magnet (7) secured thereto, an armature (4) mounted on the limbs (1, 2) of the magnet yoke and loaded by a spring (5), and an excitation coil (6), surrounding one (2) of the limbs of the magnet yoke (1, 2, 3), and with a thermo-alloy arranged in the magnet circuit, characterized in that, for the purpose of obtaining a constant response threshold independently of the surrounding temperature, a magnetic resistor (8) made of a thermo-alloy is arranged between the permanent magnet (7) and the magnet yoke shunt (3).

Description

Die Erfindung betrifft eine Temperaturkompensation für hochempfindliche permanentmagnetische Haftrelais gemäß dem Oberbegriff des Anspruches 1.The invention relates to temperature compensation for highly sensitive permanent magnetic latching relays according to the preamble of claim 1.

Derartige Relais bestehen in ihren wesentlichen Konstruktionsmerkmalen aus einem Permanentmagneten und daran anliegendem Magnetjoch, sowie einem Anker und eine den Haltefluß des Permanentmagneten beeinflussenden Erregerwicklung. Zum Erreichen einer hohen Ansprechempfindlichkeit ist es unter anderem bekannt, den magnetischen Luftspalt möglichst klein zu halten. Dagegen ist es bisher noch nicht gelungen, die Ansprechempfindlichkeit solcher Relais von der Umgebungstemperatur unabhängig zu machen. Naturgemäß wirkt die Umgebungstemperatur auf die Ansprechschwelle derart ein, daß bei hohen Temperaturen der Erregerstrom steigt, was zur Folge hat, daß das Relais bei einem anderen als dem eingestellten Wert anspricht. Dies ist aber von der Zielsetzung eines verläßlich arbeitenden Relais dieser Art nicht erwünscht, ja sogar oft von den Vorschriften her unzulässig.The main design features of such relays consist of a permanent magnet and a magnetic yoke attached to it, as well as an armature and an excitation winding which influences the holding flux of the permanent magnet. To achieve a high sensitivity, it is known, among other things, to keep the magnetic air gap as small as possible. In contrast, it has not yet been possible to make the response sensitivity of such relays independent of the ambient temperature. The ambient temperature naturally affects the response threshold in such a way that the excitation current increases at high temperatures, which means that the relay responds at a value other than the set value. However, this is not desirable from the objective of a reliably operating relay of this type, and is often even impermissible from the regulations.

Der Erfindung liegt daher die Aufgabe zugrunde, bei einem permanentmagnetischen Haftrelais gemäß dem Oberbegriff des Anspruches 1 die Ansprechschwelle solcher Relais von der Umgebungstemperatur unabhängig zu machen, bzw. den magnetischen Haftfluß durch Temperatureinwirkung zu beeinflussen.The invention is therefore based on the object of making the response threshold of such relays independent of the ambient temperature in the case of a permanent magnetic holding relay according to the preamble of claim 1, or of influencing the magnetic holding flux by the action of temperature.

Diese Aufgabe wird durch die im kennzeichnenden Teil des Anspruches 1 angegebenen Maßnahme gelöst. Weitere Ausgestaltungen der Erfindung sind den Unteransprüchen zu entnehmen.This object is achieved by the measure specified in the characterizing part of claim 1. Further refinements of the invention can be found in the subclaims.

Anhand eines in der Zeichnung dargestellten Ausführungsbeispieles wird die Erfindung näher erläutert. Es zeigt:

  • Figur 1 eine prinzipielle Darstellung des erfindungsgemäßen Haftrelais,
  • Figur 2 die Magnetflußlinien im erfindungsgemäßen Haftrelais.
The invention is explained in more detail with reference to an embodiment shown in the drawing. It shows:
  • FIG. 1 shows a basic illustration of the adhesive relay according to the invention,
  • Figure 2 shows the magnetic flux lines in the relay according to the invention.

Gemäß Figur 1 besteht das Haftrelais im wesentlichen aus einem Magnetjoch mit den beiden Schenkeln 1, 2 und dem Nebenschluß 3. Mit 4 wird der Anker bezeichnet, der mittels einer Feder 5 vorgespannt ist. Auf einem der Schenkel 2 ist eine Erregerspule 6 angeordnet. Das Magnetjoch.hat im Bereich des Nebenschlusses 3 einen Permanentmagneten 7. Die erfindungsgemäße Thermolegierung 8 zur Kompensation der Temperatur ist zwischen den Polen "N" und "S" des Permanentmagneten 7 und dem Magnetjoch-Nebenschluß 3 angeordnet.According to Figure 1, the adhesive relay consists essentially of a magnetic yoke with the two legs 1, 2 and the shunt 3. With 4, the armature is referred to, which is biased by a spring 5. An excitation coil 6 is arranged on one of the legs 2. The Magnetjoch.has a permanent magnet 7 in the area of the shunt 3. The thermal alloy 8 according to the invention for compensating the temperature is arranged between the poles "N" and "S" of the permanent magnet 7 and the Magnetjoch shunt 3.

Anhand der Darstellung in Figur 2 wird die Wirkungsweise der Erfindung näher erläutert.The mode of operation of the invention is explained in more detail on the basis of the illustration in FIG.

Wird das Haftrelais nach Einstellen seines geforderten Ansprechwertes einer Temperaturerhöhung ausgesetzt, so wird sich der Ansprechwert, gekennzeichnet durch den Erregerfluß ΦE du ΦE = (1 . N): RM― durch Vergrößerung der Sättigung im Magnetjoch-Nebenschluß 3 und der dadurch bewirkten Vergrößerung des Haftflusses Φ H sowie Vergrößerung des Spulenwiderstandes erhöhen. Die Abnahme des Magnetflusses ΦM durch Verringerung der Dauermagnetinduktion kann diese Erhöhung nur geringfügig kompensieren. Sind nun Scheiben 8 aus dem vorgeschlagenen Material in den Dauermagnetkreis, bestehend aus Dauermagnet 7 und Magnetjoch-Nebenschluß 3 eingefügt, so wird sich in dem Maße der Temperaturerhöhung der magnetische Widerstand der Scheiben aus Thermolegierung kontinuierlich vergrössern, so daß der magnetische Fluß ΦM des Dauermagneten 7 durch den Magnetjoch-Nebenschluß 3 entsprechend verringert wird. Dadurch wird der Haltefluß ΦH im Ankerkreis - Anker, Schenkel 1, 2, Magnetjoch-Nebenschluß 3 ― ebenfalls kleiner, so daß der ursprüngliche Ansprechwert wieder erzielt wird.If the latching relay is exposed to an increase in temperature after setting its required response value, the response value, characterized by the excitation flux ΦE du ΦE = (1st N): R M - by increasing the saturation in the magnetic yoke bypass 3 and the resulting increase in the Increase the adhesive flow Φ H and increase the coil resistance. The decrease in the magnetic flux ΦM by reducing the permanent magnet induction can only increase this compensate slightly. If disks 8 made of the proposed material are now inserted into the permanent magnetic circuit, consisting of permanent magnet 7 and magnetic yoke shunt 3, the magnetic resistance of the disks made of thermal alloy will increase continuously to the extent of the temperature increase, so that the magnetic flux ΦM of the permanent magnet 7 is reduced accordingly by the magnetic yoke shunt 3. As a result, the holding flux ΦH in the armature circuit - armature, leg 1, 2, magnetic yoke shunt 3 - is also smaller, so that the original response value is achieved again.

Durch die Auslegung der Scheibe bezüglich der Stärke, und durch die Wahl einer geeigneten Thermolegierung, gekennzeichnet durch ihren Curiepunkt und die Steigung, läßt sich so die kompensierende Wirkung der Scheibe genau einstellen.The compensating effect of the pane can be precisely adjusted by designing the pane with regard to its thickness and by selecting a suitable thermal alloy, characterized by its Curie point and the slope.

Claims (4)

1. Temperaturkompensation für hochempfindliche permanentmagnetische Haftrelais, bestehend aus einem Magnetjoch und daran befestigten Permanentmagneten, auf den Schenkeln des Magnetjoches gelagerten, mittels einer Feder belasteten Anker, und einer einen Schenkel des Magnetjoches umschließenden Spule, dadurch gekennzeichnet, daß zur Temperaturkompensation und zur Beeinflussung des magnetischen Haftflusses bei Temperatureinwirkung ein magnetischer Widerstand (8) mit positivem Temperaturkoeffizienten verwendet wird.1. Temperature compensation for highly sensitive permanent magnetic relay, consisting of a magnetic yoke and permanent magnets attached to it, on the legs of the magnetic yoke, loaded by a spring-loaded armature, and a leg surrounding the magnet yoke coil, characterized in that for temperature compensation and for influencing the magnetic Magnetic resistance (8) with a positive temperature coefficient is used in the adhesive flux when exposed to temperature. 2. Temperaturkompensation für hochempfindliche permanentmagnetische Haftrelais nach Anspruch 1, dadurch gekennzeichnet, daß der magnetische Widerstand (8) aus einer Thermolegierung besteht.2. Temperature compensation for highly sensitive permanent magnetic relay according to claim 1, characterized in that the magnetic resistor (8) consists of a thermal alloy. 3. Temperaturkompensation für hochempfindliche permanentmagnetische Haftrelais nach Anspruch 1 und 2, dadurch gekennzeichnet, daß der magnetische Widerstand scheibenförmig ausgebildet ist und zwischen Permanentmagnet (7) und Magnetjoch-Nebenschluß (3) angeordnet ist.3. Temperature compensation for highly sensitive permanent magnetic relay according to claim 1 and 2, characterized in that the magnetic resistance is disc-shaped and arranged between the permanent magnet (7) and magnetic yoke bypass (3). 4. Temperaturkompensation für hochempfindliche permanentmagnetische Haftrelais nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß der magnetische Widerstand der Scheibe in Reihe mit dem magnetischen Widerstand des Magnetjoch-Nebenschlusses (3) und dem des Permanentmagneten (7) liegt.4. Temperature compensation for highly sensitive permanent magnetic relay according to claims 1 to 3, characterized in that the magnetic resistance of the disc is in series with the magnetic resistance of the magnetic yoke shunt (3) and that of the permanent magnet (7).
EP81103246A 1980-06-13 1981-04-30 Temperature compensation for highly sensitive permanent-magnetic holding relays Expired EP0042056B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103246T ATE9937T1 (en) 1980-06-13 1981-04-30 TEMPERATURE COMPENSATION FOR HIGHLY SENSITIVE PERMANENT MAGNETIC RELAYS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3022168 1980-06-13
DE19803022168 DE3022168A1 (en) 1980-06-13 1980-06-13 TEMPERATURE COMPENSATION FOR HIGH-SENSITIVE PERMANENT MAGNETIC ADAPTER RELAY

Publications (2)

Publication Number Publication Date
EP0042056A1 true EP0042056A1 (en) 1981-12-23
EP0042056B1 EP0042056B1 (en) 1984-10-17

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EP81103246A Expired EP0042056B1 (en) 1980-06-13 1981-04-30 Temperature compensation for highly sensitive permanent-magnetic holding relays

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EP (1) EP0042056B1 (en)
AT (1) ATE9937T1 (en)
DE (2) DE3022168A1 (en)
ES (1) ES502997A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577920A1 (en) * 2004-03-19 2005-09-21 Siemens Aktiengesellschaft Electromagnetic trip relay
FR2942908A1 (en) * 2009-03-09 2010-09-10 Hager Electro Sas ELECTROMAGNETIC ACTUATOR WITH PERMANENT MAGNET

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933956B4 (en) * 1998-08-11 2005-11-10 Siemens Ag Electrical circuit arrangement with temperature compensation for a shape memory metal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761731C (en) * 1942-10-28 1952-10-06 Siemens Schuckertwerke A G Thermal relay with heat alloy
AT235936B (en) * 1961-07-29 1964-09-25 Siemens Ag Residual current circuit breaker with summation current transformer and a magnetic tripping device influenced by the transformer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE938799C (en) * 1943-05-27 1956-02-09 Siemens Ag Controllable magnetic circuit
IT1068331B (en) * 1975-09-25 1985-03-21 Siemens Ag THERMALLY PROTECTED DIFFERENTIAL CURRENT PROTECTION SWITCH
US4288769A (en) * 1979-11-28 1981-09-08 General Electric Company Ambient temperature responsive trip device for static trip circuit breakers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761731C (en) * 1942-10-28 1952-10-06 Siemens Schuckertwerke A G Thermal relay with heat alloy
AT235936B (en) * 1961-07-29 1964-09-25 Siemens Ag Residual current circuit breaker with summation current transformer and a magnetic tripping device influenced by the transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577920A1 (en) * 2004-03-19 2005-09-21 Siemens Aktiengesellschaft Electromagnetic trip relay
FR2942908A1 (en) * 2009-03-09 2010-09-10 Hager Electro Sas ELECTROMAGNETIC ACTUATOR WITH PERMANENT MAGNET
WO2010103218A1 (en) * 2009-03-09 2010-09-16 Hager-Electro Sas Electromagnetic actuator with permanent magnet

Also Published As

Publication number Publication date
ATE9937T1 (en) 1984-11-15
EP0042056B1 (en) 1984-10-17
DE3166681D1 (en) 1984-11-22
ES8204221A1 (en) 1982-04-01
DE3022168A1 (en) 1981-12-24
ES502997A0 (en) 1982-04-01

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