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EP0051231B1 - Déclencheur électromagnétique - Google Patents

Déclencheur électromagnétique Download PDF

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Publication number
EP0051231B1
EP0051231B1 EP19810108858 EP81108858A EP0051231B1 EP 0051231 B1 EP0051231 B1 EP 0051231B1 EP 19810108858 EP19810108858 EP 19810108858 EP 81108858 A EP81108858 A EP 81108858A EP 0051231 B1 EP0051231 B1 EP 0051231B1
Authority
EP
European Patent Office
Prior art keywords
yoke
flux
permanent magnets
magnet
holding
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
Application number
EP19810108858
Other languages
German (de)
English (en)
Other versions
EP0051231A1 (fr
Inventor
Gottfried Prof. Ing. Dr. Phil. Biegelmeier
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3575573&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0051231(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Publication of EP0051231A1 publication Critical patent/EP0051231A1/fr
Application granted granted Critical
Publication of EP0051231B1 publication Critical patent/EP0051231B1/fr
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
    • H01H71/24—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 describes a holding magnet release of high sensitivity, with a yoke body made of two parallel, ferromagnetic sheets, spaced apart by non-ferromagnetic material or air, with at least one window for at least one field winding, in which the field flux closes without a gap and the strong one Has a reduction in the cross section for the excitation flux at the point at which the trigger armature rests, and with a permanent magnet arrangement bridging the yoke plates for generating the holding flux of the trigger which is adjustable in height.
  • Holding magnet releases are known in the art, such as, for example, the blocking magnet release according to DE-C-911 755 and DE-C-949 502, the holding magnet release with short intrinsic time according to AT-B-197 895 and the holding magnet release with multi-layer yoke according to AT-B-242 777.
  • AT-B-278 954 also describes a release which has an iron-closed, air-gap-free, magnetic excitation circuit and has a simple construction.
  • the tripping armature and the permanent magnet are arranged side by side on the narrow side of a double yoke.
  • the double yoke consists of two yoke sheets made of highly permeable material, which are spaced by a layer of non-ferromagnetic material or air.
  • the setting is very sensitive to lateral displacements of the permanent magnets.
  • the trigger sensitivity of the permanent magnet release is set by turning the permanent magnet. It is advantageous if the induction in the armature air gap depends as evenly as possible on the angle of rotation of the permanent magnet. In the known arrangement, however, the change in the permanent flow with respect to the angle of rotation is relatively large, so that the setting accuracy is relatively low. This is due to the fact that the permanent magnet is arranged on the end face of the yoke and is only partially covered by the faces of the two yoke sheets.
  • AT-B-337 811 represents an improvement. It describes a holding magnet release in which the permanent magnet is fully covered by the yoke plates.
  • the yoke sheets are L-shaped, so that two pole shoes are formed, on which the permanent magnet is seated and are thus completely covered by them. In this way, the yoke assumes the shape of a T when assembled.
  • the permanent magnet is no longer arranged on the end face of the yoke, on which the tripping armature also rests, but is placed on the surface formed by the crossbar of the T-shaped double yoke, which thus has the function of pole pieces.
  • a bearing plate made of non-ferromagnetic material which has an opening adapted to the shape of the permanent magnet, into which the permanent magnet is rotatably inserted and which determines its position.
  • the object of the invention is therefore to create a holding magnet release of the type mentioned, the setting of which can be changed as precisely as possible within a narrow tolerance range.
  • the permanent magnet arrangement consists of at least two separate permanent magnets, of which a first magnet providing a base flux of a certain height is fixed with respect to the yoke plates and a second magnet is arranged so that it can move with respect to the two yoke plates provides a flow component which is adjustable in height and which optionally strengthens or weakens the basic flow.
  • the trigger can be reduced in size in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on the two narrow sides of the yoke body with respect to the excitation winding and with respect to the armature.
  • the trigger can be further reduced according to the invention in that the permanent magnets are distributed in a rotatable, displaceable or fixed arrangement on a narrow side of the yoke body and on a further window in the yoke body.
  • a magnet is fixed in its position and provides a constant permanent flux and thus a constant holding force for the release armature.
  • This basic flow is determined by the design of the trigger and the manufacturing requirements.
  • the second, usually smaller magnet is rotatably arranged and provides the permanent control flow, by means of which the required holding force and thus the correct triggering range can be adjusted additively or subtractively to the basic flow.
  • the yoke plates Due to the high control accuracy, the yoke plates only need to be equipped with small pole pieces, or these can be omitted at all. This makes it possible to build the trigger in a particularly space-saving manner.
  • a permanent magnet preferably a cylindrical magnet
  • the second permanent magnet preferably in the form of a prism (magnetic strip)
  • the second permanent magnet can be arranged fixedly or rotatably on another narrow side of the yoke body , for example opposite the anchor.
  • Fig. 1 which shows a graphical representation of the dependence of the permanent flux on the twist angle
  • 1 is the curve which shows the permanent flux for two magnets
  • 2 the curve which shows the permanent flux for one magnet.
  • 45R is the control flow, i.e. the flow that can be influenced by adjustment
  • PB is the base flow.
  • the total flow in the yoke body is now 60% of the initial value.
  • the control accuracy therefore has a value of around 0.02% per degree of twist angle. If you would only work with a permanent magnet according to AT-B-278 954, the permanent flux changes by 100% at an angle of rotation of 90 °. The control accuracy would then only have a value of around 1% per degree.
  • the two figures show a holding magnet release in two views. It consists of two permanent magnets 1a and 1b, an excitation winding 2 (there may of course also be more excitation windings) for generating the excitation flux, a tripping armature 3, and one with windows 2a for the excitation winding, consisting of two ferromagnetic ones running parallel to each other through one layer 6 made of non-ferromagnetic material or air-spaced sheets 4 and 5 yoke body, in which the excitation flow closes without air gap and which has a strong cross-sectional reduction for the excitation flow at the point at which the trigger armature 3 rests. This area is designated by the reference number 5a.
  • the armature and the permanent magnets bridge the yoke plates 4 and 5 and the armature is under the tensile force of a tension spring 7.
  • the two permanent magnets 1 and 1b are arranged on the narrow side of the yoke body opposite the excitation winding 2, a permanent magnet 1a fixing in position and the other 1b is rotatably arranged to regulate the permanent flow.
  • the rotatable permanent magnet 1b is arranged on the narrow side of the yoke body opposite the excitation winding 2, whereas the permanent magnet 1a fixed in its position is on the narrow side of the yoke body opposite the armature 3.
  • FIG. 5 shows a view of the trigger according to FIG. 4 in the direction of arrow A
  • FIG. 6 shows the view of the trigger according to FIG. 4 in the direction of arrow B.
  • FIG. 7 and 8 show an embodiment of the invention in which a permanent magnet is arranged in a further window 12 of the yoke body.
  • the position of the permanent magnet 1a is fixed in the further window 12, whereas the permanent magnet 1b is rotatably arranged on a narrow side of the yoke body 4, 5 and 6.
  • FIGS. 9 and 10 show a yoke body in which, for better stabilization of the magnets, the air gap 6 is widened in the region 14 by angling the yoke plates 4 and 5.

Landscapes

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

Claims (4)

1. Déclencheur pour aimant de maintien de haute sensibilité, comportant une culasse qui, constituée de deux tôles ferromagnétiques (4, 5) mutuellement parallèles et espacées par une matière non ferromagnétique ou par de l'air, est percée d'au moins une fenêtre (2a) pour au moins un enroulement d'excitation (2), le flux excitateur se fermant sans aucun entrefer dans ladite culasse qui présente une forte diminution de section pour ce flux excitateur dans la zone dans laquelle l'induit de déclenchement (3) est appliqué; ainsi qu'un dispositif à aimants permanents qui coiffe les tôles (4, 5) de la culasse en vue d'engendrer le flux de maintien, de niveau réglable, du déclencheur, caractérisé par le fait que le dispositif à aimants permanents se compose d'au moins deux aimants permanents distincts (1a, 1b) parmi lesquels un premier aimant (1a) délivrant un flux de base de niveau déterminé est monté fixe par rapport aux tôles (4, 5) de la culasse, et un second aimant permanent (1b) est monté mobile par rapport aux deux tôles (4,5) de ladite culasse, de manière qu'il délivre une composante de flux de niveau ajustable qui amplifie ou affaiblit sélectivement ledit flux de base.
2. Déclencheur pour aimant de maintien selon la revendication 1, caractérisé par le fait que les aimants permanents (1a ou 1 b) sont répartis selon un agencement rotatif, coulissant ou fixe sur les deux petits côtés de la culasse (4, 5, 6) par rapport à l'enroulement d'excitation (2) et par rapport à l'induit (3) (fig. 4,5).
3. Déclencheur pour aimant de maintien selon la revendication 1, caractérisé par le fait que les aimants permanents sont répartis selon un agencement rotatif, coulissant ou fixe sur un petit côté de la culasse (4, 5, 6) et sur une autre fenêtre (12) pratiquée dans cette culasse.
4. Déclencheur pour aimant de maintien selon l'une des revendications précédentes, que les aimants permanents (1 a, 1 b) sont réalisés sous la forme de cylindres ou de bandes.
EP19810108858 1980-11-04 1981-10-24 Déclencheur électromagnétique Expired EP0051231B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT541780A AT372217B (de) 1980-11-04 1980-11-04 Haltemagnetausloeser hoher empfindlichkeit
AT5417/80 1980-11-04

Publications (2)

Publication Number Publication Date
EP0051231A1 EP0051231A1 (fr) 1982-05-12
EP0051231B1 true EP0051231B1 (fr) 1984-09-19

Family

ID=3575573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810108858 Expired EP0051231B1 (fr) 1980-11-04 1981-10-24 Déclencheur électromagnétique

Country Status (3)

Country Link
EP (1) EP0051231B1 (fr)
AT (1) AT372217B (fr)
DE (1) DE3166197D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389018B (de) * 1987-11-09 1989-10-10 Felten & Guilleaume Ag Oester Haltemagnetausloeser
DE59610915D1 (de) * 1996-01-23 2004-03-18 Abb Schweiz Ag Joch für einen vorzugsweise in einem Fehlerstrom-Schutzschalter einsetzbaren Magnetauslöser
DE19637077A1 (de) * 1996-09-12 1998-03-19 Maier & Cie C Permanentmagnet für den magnetischen Kreis eines vorzugsweise in einem Fehlerstromschutzschalter einsetzbaren Magnetauslösers
DE102013113456A1 (de) * 2013-12-04 2015-06-11 Eaton Electrical Ip Gmbh & Co. Kg Magnet-Auslöser für ein Schaltgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1819419U (de) * 1958-03-20 1960-10-13 Siemens Ag Sperrmagnet.
AT242777B (de) * 1963-04-26 1965-10-11 Felten & Guilleaume Ag Oester Haltemagnetauslöser mit mindestens dreiteiligem Jochkörper
AT278954B (de) * 1968-10-22 1970-02-25 Felten & Guilleaume Ag Oester Magnetauslöser
AT337811B (de) * 1975-12-02 1977-07-25 Felten & Guilleaume Ag Oester Doppeljoch-haltemagnetausloser

Also Published As

Publication number Publication date
ATA541780A (de) 1983-01-15
EP0051231A1 (fr) 1982-05-12
AT372217B (de) 1983-09-12
DE3166197D1 (en) 1984-10-25

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