EP2395532A1 - Contacteur électromagnétique avec bague de guidage - Google Patents

Contacteur électromagnétique avec bague de guidage Download PDF

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Publication number
EP2395532A1
EP2395532A1 EP11167606A EP11167606A EP2395532A1 EP 2395532 A1 EP2395532 A1 EP 2395532A1 EP 11167606 A EP11167606 A EP 11167606A EP 11167606 A EP11167606 A EP 11167606A EP 2395532 A1 EP2395532 A1 EP 2395532A1
Authority
EP
European Patent Office
Prior art keywords
armature
passage
electromagnetic contactor
housing
guide ring
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.)
Withdrawn
Application number
EP11167606A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jacques Dumoux
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.)
ABB Technology AG
Original Assignee
ABB France SAS
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 ABB France SAS filed Critical ABB France SAS
Publication of EP2395532A1 publication Critical patent/EP2395532A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil

Definitions

  • the coil generates a magnetic field applying to the mobile armature when it is crossed by an electric current.
  • An elastic means such as a spring, is provided to keep the fixed and movable parts apart in the absence of supply of the coil.
  • a first call phase when the coil is supplied with current, the magnetic circuit tends to close, the movable armature approaching the fixed armature until these two parts are in contact.
  • This so-called power call power is related to the number of ampere-turns of the coil, that is to say the product of the number of turns of the coil and the value of the current intensity in the coil.
  • the magnetic circuit During a second holding phase, the magnetic circuit must remain in the closed position as long as the supply of the coil is present. In this second phase, the amperes-turns necessary level is much lower than in the call phase, because the air gap is zero due to the position of the movable armature inside the coil, and the magnetic efforts are maximum.
  • the call power required for the passage from the first to the second phase also depends on the mechanical friction generated by the movement of the mobile armature on the partition wall between the mobile armature and the fixed armature, the latter depending on the transverse magnetic effects, due to misalignment of the axis of the mobile armature with respect to the axis of the fixed armature, and the weight of the movable armature.
  • the present invention aims to solve all or part of the disadvantages mentioned above.
  • the subject of the present invention is an electromagnetic contactor comprising a fixed armature comprising a housing chamber for a coil for generating a magnetic field, the chamber having an opening, a lid for closing the opening of the magnetic field. enclosure, the closure cover having a passage, and a movable armature passing through the passage of the closure cover of the opening of the enclosure, characterized in that it comprises a guide ring made of non-magnetic material disposed in the passage.
  • closing cover so as to have, between a first wall in contact with the wall of the passage of the cover, and a second wall facing the moving armature, a thickness corresponding to the minimum radial gap between the moving armature and the fixed armature and in that the closure cover comprises a collar delimiting the passage and extending towards the inside of the box enclosure the coil.
  • This arrangement allows the magnetic ring alone to ensure the guiding function of the mobile armature, locating the mechanical friction generated between the mobile armature and the fixed armature during movement of the armature only on a surface on the inner surface of the non-magnetic ring and to provide support for the guide ring in the direction of movement of the movable armature.
  • the fact that the ring is arranged at the minimum radial air gap between the moving armature and the fixed armature increases the magnetic force generated by the coil on the moving armature and avoids unnecessarily increasing the power of the coil. .
  • the guide ring covers the entire collar of the closure lid.
  • the guide ring comprises a first tubular portion whose thickness corresponds to the minimum radial gap between the mobile armature and the fixed armature, that is to say that the outside diameter of this first tubular portion substantially corresponds to the diameter of the passage of the cover and that the inner diameter of this first tubular portion substantially corresponds to the diameter of the mobile armature at the passage of the lid.
  • This arrangement makes it possible to reduce as much as possible the thickness of the air gap intersecting the magnetic circuit between the fixed armature and the mobile armature.
  • the guide ring comprises a second tubular portion whose inner diameter is the same as the inner diameter of the first portion and whose outer diameter is greater than the outer diameter of the first portion.
  • This arrangement makes it possible to ensure the mechanical retention of the guide ring.
  • the second tubular portion is located inside the housing housing of the coil.
  • This arrangement also makes it possible to ensure the mechanical retention of the guide ring inside the housing housing of the coil during repeated movements of the mobile armature.
  • the or another second tubular portion is located outside the housing housing of the coil.
  • This arrangement allows to insert the ring once the enclosure closed by the cover.
  • the first tubular portion protrudes from the passage of the lid.
  • This arrangement ensures better guidance of the mobile armature.
  • the guide ring is split over its height.
  • This arrangement imparts elasticity to the guide ring contributing to its mechanical retention within the housing housing of the coil.
  • the guide ring comprises a housing for one end of a return means of the movable armature.
  • This arrangement allows to exert a continuous pressure against the guide ring.
  • an electromagnetic contactor 1 comprises a fixed armature 10 and a movable armature 20 also called a core.
  • the fixed armature 10 comprises a housing chamber 11, otherwise called a magnetic tank, intended to receive a coil 2 for generating a magnetic field when traversed by an electric current.
  • the coil 2 is formed by the winding of a conductor 5 around a hollow body 4 of cylindrical shape.
  • the hollow body 4 is the junction between a first base 6a and a second base 6b both having a disk shape arranged transversely on one end of the hollow body 4 of cylindrical shape.
  • the bases 6a, 6b each respectively comprise an opening 8a, 8b opening inside the hollow cylindrical body 4.
  • the opening 8a comprises a portion of diameter greater than the inside diameter of the hollow cylindrical body 4. The difference in diameter of this portion with the hollow cylindrical body 4 is compensated by an annular shoulder 9 disposed in the opening 8a.
  • the base 6a has two portions 7 opposite one another to accommodate the connection terminals 3 of the conductor 5 of the coil 2.
  • the housing enclosure 11 has a cylindrical shape with a main opening 12 for the insertion of the coil 2 at a first base of this cylindrical shape with two other secondary openings 14 disposed on the contour surface of the cylindrical shape of the housing chamber 11 and opposite to each other and contiguous to the main opening 12, and secondly a bottom 16 having a portion 17 in the form of "V" overturned protruding inside the housing enclosure 11.
  • the two secondary openings 14 define the location of the two portions 7 of the base 6a protruding from the contour surface of the cylindrical shape generated by the winding of the conductor 5 and including the terminals 3 of the coil 2 when the latter is in place in its housing 11.
  • the main opening 12 is covered by a closure cover 13 which confines the coil 2 in its housing enclosure 11.
  • This closure cover 13 comprises a passage 15 comprising a collar 18 oriented transversely to the surface of the closure cover 13 in the direction of from inside the housing enclosure 11.
  • This collar 18 is substantially the same as the diameter of the inside of the hollow cylindrical body 4 and the outside diameter of this collar 18 is substantially the same as the diameter of the upper diameter portion of the opening 8a of the base 6a of the coil 2.
  • the movable armature 20 is made in one piece and formed by a hollow body 21 of cylindrical shape and of diameter substantially equal to the game close to that of the inside of the hollow cylindrical body 4 of the coil 2.
  • This hollow cylindrical body 21 comprises a lower portion comprising a recess 22 of complementary shape to the portion 17 in the shape of an inverted "V" disposed at the bottom 16 of the housing enclosure 11 and projecting inside the enclosure of housing 11.
  • the hollow cylindrical body 21 also comprises a head 23 of diameter narrower than the main diameter of the hollow cylindrical body 21 with a shoulder 24 terminating the head 23 of intermediate diameter between the main diameter of the head 23 and the main diameter of the body hollow cylindrical 21.
  • the head 23 is intended to immobilize a contact holder (not shown) whose lower face is used as a support for a first end 41 of a helical return spring 40 whose function is to maintain the fixed armature 10 and the movable armature 20 apart in the absence of supply of the coil 2, the second end 42 of the helical return spring 40 bearing on the closure cover 13.
  • annular ring 301 illustrated more particularly in the figure 3 is inserted between the coil 2 and the closure lid 13.
  • This ring 301 is made of a non-magnetic material, that is to say devoid of any magnetic properties, such as a thermoplastic material.
  • the ring 301 comprises a first portion 311 and a second portion 321 forming an annular shoulder 351.
  • the outer diameter of the first portion 311 is smaller than the outer diameter of the second portion 321.
  • This outer diameter of the second portion 321 substantially corresponds to the diameter of the annular shoulder 9 disposed in the opening 8a of the base 6a of the coil 2 while the outer diameter of the first portion 311 substantially corresponds to the diameter of the passage 15 of the closing cover 13.
  • the inside diameter of the first portion 311 and the inside diameter of the second portion 321 are both substantially equal to the clearance to the outside diameter of the hollow cylindrical body 21 of the moving armature 20 thereby forming a guide surface 331 therein. .
  • the guide ring 301 is slotted and comprises over its entire height an oblique slot 341.
  • This slot 341 gives a radial elasticity to the ring 301 allowing it to be inserted and to remain more easily on the one hand on the annular shoulder 9 disposed in the opening 8a of the base 6a of the coil 2 and on the other hand against the flange 18 of the closure lid 13.
  • the first portion 311 passes completely through the passage 15 of the closure cap 13 protruding from it, the second portion 322 serving as a stop for the depression of this first portion 311 in the passage 15 of the closure cover 13.
  • the guide ring 301 is disposed coaxially with the hollow cylindrical body 21 of the movable armature 20 and is held in this position by the end of the collar 18 of the passage 15 of the closure cap 13 which in its normal closed position bears on the shoulder 351 of the guide ring 301 to press it against the shoulder 9 disposed in the opening 8a of the base 6a of the coil 2.
  • annular ring 302 illustrated more particularly in the figure 6 is inserted between the closure cover 13 and the helical return spring 40.
  • This ring 302 is made of a non-magnetic material, that is to say devoid of any magnetic properties, such as a thermoplastic material.
  • the ring 302 comprises a first portion 312 and a second portion 322.
  • the first portion 312 comprises a first portion 312a and a second portion 312b separated by the second portion 322 forming a first annular shoulder 352 and a second annular shoulder 362 respectively between the first portion 312a of the first portion 312 and the second portion 322 and between the second portion 312b of the first portion 312 and the second portion 322.
  • the outside diameter of the two portions 312a, 312b of the first portion 312 is smaller than the outside diameter of the second portion 322.
  • the outer diameter of the two portions 312a, 312b of the first portion 312 corresponds substantially to the diameter of the passage 15 of the closure cover 13 while the outer diameter of the second portion 322 is slightly greater than the diameter of the helical return spring 40 disposed between the contact door and closure cover 13.
  • the second shoulder 362 comprises a peripheral edge 372 thus delimiting a housing 382 for the second end 42 of the helical return spring 40.
  • the inner diameter of the first portion 312 and the inner diameter of the second portion 322 are both substantially equal to the clearance to the outer diameter of the hollow cylindrical body 21 of the movable armature 20 thereby forming a guide surface 332 therefor .
  • the guide ring 302 is split and comprises over its entire height a curvilinear slot 342.
  • This slot 342 gives a radial elasticity to the ring 302 allowing it to be inserted into the passage 15 of the closure lid 13 and to be held more easily against one part of the collar 18 of the same closure cap 13 and on the other hand on the annular shoulder 9 disposed in the opening 8a of the base 6a of the coil 2, the diameter of which corresponds in this embodiment substantially to the outer diameter of the first portion 312 of the ring 302.
  • the first portion 312a of the first portion 312 passes completely through the passage 15 of the closure cap 13 projecting therefrom, the second portion 322 serving as a stop for the depression of this first portion 312a of the first portion 312 in the passage 15 of the closure lid 13.
  • the guide ring 302 is arranged coaxially with the hollow cylindrical body 21 of the moving armature 20 and is held in this position by the action of the helical return spring 40 in the housing 382 of the guide ring 302 to press against the closing cover 13.
  • the air gap between the fixed armature 10 and the armature 20 is minimal and corresponds to the thickness of the first portion 31 of the guide ring 30.
  • this thickness is 0.8 mm.
  • the height of the guide ring 30, the minimum clearance thereof with the cylindrical hollow body 21 and the coefficient of friction of the cylindrical hollow body 21 on the guide surface 33 allow the cylindrical hollow body 21 to be properly guided to bottom of the housing enclosure 11 by reducing the forces, dissymmetries and radial electromagnetic forces.
  • the recess 22 of the cylindrical hollow body 21 coincides with the projecting portion 17 disposed on the bottom 16 of the housing enclosure 11.
  • the cylindrical hollow body 21 of the mobile armature 20 After the reduction of the current beyond a certain threshold value maintaining the cylindrical hollow body 21 of the mobile armature 20 inside the housing enclosure 11, the cylindrical hollow body 21 resumes its original position under the action of the helical return spring 40, the guide ring 30 having only the sole function of guiding the cylindrical hollow body 21 of the moving armature 20.
  • the electromagnetic contactor 1 could comprise a guide ring comprising a combination of the two embodiments presented with a first second portion located between the closure cover 13 and the housing enclosure 11 and a second portion located between the The insertion of such a guide ring through the passage 15 of the closure cap is made possible thanks to the elasticity of the ring and its slot whose geometry could allow an overlap of the two edges of the slot during its introduction through the passage 15.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP11167606A 2010-06-11 2011-05-26 Contacteur électromagnétique avec bague de guidage Withdrawn EP2395532A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1054635A FR2961341B1 (fr) 2010-06-11 2010-06-11 Contacteur electromagnetique avec bague de guidage

Publications (1)

Publication Number Publication Date
EP2395532A1 true EP2395532A1 (fr) 2011-12-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11167606A Withdrawn EP2395532A1 (fr) 2010-06-11 2011-05-26 Contacteur électromagnétique avec bague de guidage

Country Status (4)

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US (1) US8502629B2 (zh)
EP (1) EP2395532A1 (zh)
CN (1) CN102280312B (zh)
FR (1) FR2961341B1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT509279A1 (de) * 2008-07-31 2011-07-15 Moeller Gebaeudeautomation Gmbh Schaltgerät
US10780637B2 (en) 2015-06-10 2020-09-22 Apis Cor Engineering, Llc 3-D printer in polar coordinates

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2288938A (en) * 1940-12-09 1942-07-07 Gen Motors Corp Solenoid unit for controlling automobile overdrives
US2414961A (en) * 1944-10-26 1947-01-28 Gen Electric Electromagnetic device
US2594396A (en) * 1944-12-15 1952-04-29 Cutler Hammer Inc Contact mounting
FR1192841A (fr) * 1958-03-11 1959-10-28 Burckhardt Ag Maschf Garniture d'étanchéité pour arbres et tiges de piston
US3444490A (en) * 1966-09-30 1969-05-13 Westinghouse Electric Corp Electromagnetic structures for electrical control devices

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544857A (en) * 1995-02-17 1996-08-13 Eaton Corporation Electrically operated expansion valve
JP2000348931A (ja) * 1999-06-08 2000-12-15 Smc Corp 電磁アクチュエータ
US6955336B2 (en) * 2001-02-06 2005-10-18 Delphi Technologies, Inc. Sleeveless solenoid for a linear actuator
US6918571B1 (en) * 2004-11-18 2005-07-19 Eaton Corporation Solenoid operated valve assembly and method of making same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2288938A (en) * 1940-12-09 1942-07-07 Gen Motors Corp Solenoid unit for controlling automobile overdrives
US2414961A (en) * 1944-10-26 1947-01-28 Gen Electric Electromagnetic device
US2594396A (en) * 1944-12-15 1952-04-29 Cutler Hammer Inc Contact mounting
FR1192841A (fr) * 1958-03-11 1959-10-28 Burckhardt Ag Maschf Garniture d'étanchéité pour arbres et tiges de piston
US3444490A (en) * 1966-09-30 1969-05-13 Westinghouse Electric Corp Electromagnetic structures for electrical control devices

Also Published As

Publication number Publication date
FR2961341B1 (fr) 2013-07-05
US20110304414A1 (en) 2011-12-15
CN102280312A (zh) 2011-12-14
FR2961341A1 (fr) 2011-12-16
CN102280312B (zh) 2016-02-24
US8502629B2 (en) 2013-08-06

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