EP0051231A1 - Déclencheur électromagnétique - Google Patents

Déclencheur électromagnétique Download PDF

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Publication number
EP0051231A1
EP0051231A1 EP19810108858 EP81108858A EP0051231A1 EP 0051231 A1 EP0051231 A1 EP 0051231A1 EP 19810108858 EP19810108858 EP 19810108858 EP 81108858 A EP81108858 A EP 81108858A EP 0051231 A1 EP0051231 A1 EP 0051231A1
Authority
EP
European Patent Office
Prior art keywords
yoke
yoke body
magnet
permanent
permanent 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
EP19810108858
Other languages
German (de)
English (en)
Other versions
EP0051231B1 (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
BBC Brown Boveri 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(A1) "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, BBC Brown Boveri 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 flow at the point at which the trigger armature rests, with at least one excitation winding for generating the excitation flow and with a trigger anchor that bridges the sheets of the yoke body at the point at which the yoke body cross section for the excitation flow is greatly reduced .
  • AT-PS 278 954 also describes a release that has an iron-closed, air-gap-free, magnetic excitation circuit and has a simple structure.
  • 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 flux relative 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-PS 337 811 The solution described in AT-PS 337 811 is 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.
  • the yoke takes on the shape of a T when assembled.
  • the permanent magnet is no longer attached to the End face of the yoke is arranged, on which also the release anchor rests, but is placed on the surface formed by the crossbar of the T-shaped double yoke, which thus receives 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.
  • At least two permanent magnets are arranged on the narrow sides and / or in at least one further window of the yoke body in such a way that they bridge the gap between the yoke sheets, at least one permanent magnet fixing its position and at least one other one Regulation of the permanent flow is arranged adjustable.
  • Another trigger downsizing can be achieved according to the invention in that when using two permanent magnets, one of the two permanent magnets is rotatably or fixedly fastened on a narrow side of the yoke body with respect to the excitation winding and the second permanent magnet is rotatably or firmly attached to the armature on the narrow side of the yoke body.
  • the trigger can be further reduced according to the invention if a permanent magnet is firmly, rotatably or displaceably attached to a side edge of the yoke body in such a way that it bridges the air gap of the yoke plates, whereas the second permanent magnet can be rotated, displaced or in the further window is firmly attached so that it also bridges the air gap.
  • 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 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 angle of rotation
  • 1 is the curve which shows the permanent flux for two
  • 2 the curve which shows the permanent flux for a magnet
  • ⁇ R is the control flow, i.e. the flow that can be regulated by adjustment
  • i B is the base flow.
  • the control accuracy therefore has a value of around 0.2% per degree of twist angle. If you would only work with a permanent magnet according to AT-PS 278 954, the permanent flux changes by 100% at a twist angle of 90o. The control accuracy would then only have a value of around 1% per degree.
  • FIGS. 2 and 3 show a first exemplary embodiment of the invention.
  • 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 one another Layer 6 made of non-ferromagnetic material or air-spaced sheets 4 and 5 constructed yoke body, in which the excitation flow closes without an 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 1a 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.
  • FIGS. 4 to 6 show a further embodiment of the invention.
  • 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.
  • FIGS. 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)
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 true EP0051231A1 (fr) 1982-05-12
EP0051231B1 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316295A3 (fr) * 1987-11-09 1990-10-10 Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Déclencheur à aimant de maintien
EP0786789A3 (fr) * 1996-01-23 2000-06-21 CMC Carl Maier + Cie AG Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut
EP0829895A3 (fr) * 1996-09-12 2000-11-02 CMC Carl Maier + Cie AG Aimant permanent pour le circuit magnétique d'un déclencheur magnétique de préférence pour un disjoncteur différentiel
EP2881967A1 (fr) * 2013-12-04 2015-06-10 Eaton Electrical IP GmbH & Co. KG Déclencheur d'aimant pour un appareil de commutation

Citations (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

Patent Citations (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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316295A3 (fr) * 1987-11-09 1990-10-10 Felten & Guilleaume Fabrik elektrischer Apparate Aktiengesellschaft Déclencheur à aimant de maintien
EP0786789A3 (fr) * 1996-01-23 2000-06-21 CMC Carl Maier + Cie AG Culasse en particulier pour un déclencheur utilisable dans un disjoncteur de courant de défaut
EP0829895A3 (fr) * 1996-09-12 2000-11-02 CMC Carl Maier + Cie AG Aimant permanent pour le circuit magnétique d'un déclencheur magnétique de préférence pour un disjoncteur différentiel
EP2881967A1 (fr) * 2013-12-04 2015-06-10 Eaton Electrical IP GmbH & Co. KG Déclencheur d'aimant pour un appareil de commutation

Also Published As

Publication number Publication date
ATA541780A (de) 1983-01-15
EP0051231B1 (fr) 1984-09-19
DE3166197D1 (en) 1984-10-25
AT372217B (de) 1983-09-12

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