EP0432055A1 - Magnetkreis mit Kurzschlussring für mit wechselstrombetriebenes Elektrogerät - Google Patents

Magnetkreis mit Kurzschlussring für mit wechselstrombetriebenes Elektrogerät Download PDF

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Publication number
EP0432055A1
EP0432055A1 EP90420499A EP90420499A EP0432055A1 EP 0432055 A1 EP0432055 A1 EP 0432055A1 EP 90420499 A EP90420499 A EP 90420499A EP 90420499 A EP90420499 A EP 90420499A EP 0432055 A1 EP0432055 A1 EP 0432055A1
Authority
EP
European Patent Office
Prior art keywords
magnetic circuit
ring
sheet
groove
sheets
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
EP90420499A
Other languages
English (en)
French (fr)
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EP0432055B1 (de
Inventor
André Vasseur
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0432055A1 publication Critical patent/EP0432055A1/de
Application granted granted Critical
Publication of EP0432055B1 publication Critical patent/EP0432055B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements
    • H01F7/1205—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements having short-circuited conductors

Definitions

  • the invention relates to a magnetic circuit for electrical equipment with alternating current, comprising a stack of elementary sheets in the shape of a U and made of ferromagnetic material, and a phase shift ring partially surrounding a polar surface of the magnetic circuit to create an asymmetry in the distribution of the magnetic flux, said ring being formed by a conducting short-circuiting turn having a substantially square or rectangular section.
  • phase shift ring avoids the vibrations of the magnetic circuit due to the excitation in alternating current of the control coil. It is conventional to insert the phase shift ring in a notch made in the polar surface of the magnetic circuit (CH 232.768). The ring surrounds a fraction of the polar surface to create asymmetry in the distribution of the flux.
  • the notch is generally obtained by a cutting operation, and is at least as wide as the thickness of each sheet. Such technology is suitable for thin sheets less than 1 mm thick.
  • phase shift ring For a magnetic circuit with thick sheets, having in particular a thickness close to 2 mm per sheet, the implementation of the phase shift ring is difficult to achieve by a cutting operation which requires a notch width greater than the thickness of prison. There is of course the possibility of milling a narrower notch, but this manufacturing process is expensive.
  • the object of the invention is to improve the implementation of a phase shift ring for a magnetic circuit with thick sheets.
  • the magnetic circuit according to the invention is characterized in that that the ring extends parallel in slight withdrawal relative to the pole surface, with passage in a groove formed between two sheets joined together, said groove being produced by stamping.
  • the groove is formed in the lateral face of at least one branch of each sheet, the depth of the groove being less than the thickness of a sheet, and substantially equal to that of the recessed side of the ring.
  • the sheets are produced by a cutting tool after stamping the grooves.
  • the sheet pack is then riveted after stacking of the elementary sheets.
  • the phase shift ring is embedded in the magnetic circuit, without any discontinuity in the corresponding front pole surface.
  • phase shift ring Two opposite parallel sides of the phase shift ring protrude from the external edge and the internal edge of two consecutive sheets joined to the magnetic circuit.
  • a U-shaped magnetic circuit 10 comprises a stack of three thick elementary sheets 12,14,16 made of ferromagnetic material, and at least one phase shift ring 18 made of conductive material.
  • the phase shift ring 18 is formed by a short-circuited turn obtained by cutting or cutting a tube of square or rectangular section.
  • the sheets 12, 14, 16 have an identical U-shaped structure, each with an individual thickness close to 2 mm.
  • Each sheet is produced by cutting, and comprises two front surfaces 20, 22 (FIG. 1) arranged at the ends of the two branches 24, 26 of the same length.
  • a rectangular groove 28 is formed in one of the lateral faces of each branch 24, 26, the depth of the groove 28 being less than the thickness of each sheet 12, 14, 16, and allowing insertion on one side of the phase shift ring 18.
  • the grooves 28 are produced by stamping before the sheet metal cutting operation.
  • the phase shift ring 18 is first inserted into the groove 28 of the first sheet 12, extending perpendicular to the branch 26.
  • the second sheet 14 is then placed against the first sheet 12 after passage (see arrow F1, FIG. 3) through the window of the ring 18.
  • the third sheet 16 is applied in the direction of arrow F2 against the second sheet 14, so as to trap the ring 18 of phase shift in the package, which can then be riveted for the final assembly of the sheets 12,14,16 of the magnetic circuit 10 ( Figure 5).
  • phase shift ring 18 is slightly set back relative to the pole face 30 formed by the joining of the three plane pole surfaces 22.
  • the other pole face 32 of the magnetic circuit 10 is devoid of phase shift ring.
  • Such an arrangement of the ring 18 facilitates manufacture and avoids any discontinuity in the pole face 30 of the magnetic circuit 10.
  • the magnetic circuit 10 can be used in alternating current electrical equipment, in particular electromagnets, contactors, remote switches and tripping auxiliaries with emission of current MX or with undervoltage MN.
  • a second phase shift ring can be incorporated in the grooves 28 of the branches 24, set back from the pole face 32.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
EP19900420499 1989-12-05 1990-11-20 Magnetkreis mit Kurzschlussring für mit wechselstrombetriebenes Elektrogerät Expired - Lifetime EP0432055B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916167 1989-12-05
FR8916167A FR2655472B1 (fr) 1989-12-05 1989-12-05 Circuit magnetique a bague de dephasage pour appareillage electrique a courant alternatif.

Publications (2)

Publication Number Publication Date
EP0432055A1 true EP0432055A1 (de) 1991-06-12
EP0432055B1 EP0432055B1 (de) 1994-03-16

Family

ID=9388242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900420499 Expired - Lifetime EP0432055B1 (de) 1989-12-05 1990-11-20 Magnetkreis mit Kurzschlussring für mit wechselstrombetriebenes Elektrogerät

Country Status (3)

Country Link
EP (1) EP0432055B1 (de)
DE (1) DE69007437D1 (de)
FR (1) FR2655472B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348844A (en) 1999-04-13 2000-10-18 Weatherford Lamb Apparatus and method for aligning tubulars

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR857941A (fr) * 1938-07-18 1940-10-05 Philips Nv Relais excité par du courant alternatif
CH232768A (de) * 1943-03-26 1944-06-15 Bbc Brown Boveri & Cie Einphasen-Wechselstrommagnet mit Kurzschlusswindung.
GB674702A (en) * 1949-07-26 1952-06-25 British Thomson Houston Co Ltd Improvements in and relating to alternating current electromagnets
DE1268742B (de) * 1961-09-06 1968-05-22 Siemens Ag Anordnung und Befestigung von Kurzschlussringen
EP0304343A2 (de) * 1987-06-22 1989-02-22 Linton And Hirst Limited Blechpaket und Verfahren zur Herstellung von Fortsätzen und Vertiefungen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR857941A (fr) * 1938-07-18 1940-10-05 Philips Nv Relais excité par du courant alternatif
CH232768A (de) * 1943-03-26 1944-06-15 Bbc Brown Boveri & Cie Einphasen-Wechselstrommagnet mit Kurzschlusswindung.
GB674702A (en) * 1949-07-26 1952-06-25 British Thomson Houston Co Ltd Improvements in and relating to alternating current electromagnets
DE1268742B (de) * 1961-09-06 1968-05-22 Siemens Ag Anordnung und Befestigung von Kurzschlussringen
EP0304343A2 (de) * 1987-06-22 1989-02-22 Linton And Hirst Limited Blechpaket und Verfahren zur Herstellung von Fortsätzen und Vertiefungen

Also Published As

Publication number Publication date
DE69007437D1 (de) 1994-04-21
FR2655472A1 (fr) 1991-06-07
EP0432055B1 (de) 1994-03-16
FR2655472B1 (fr) 1994-03-04

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