EP2058831A1 - Elektromagnetische Auslösevorrichtung - Google Patents

Elektromagnetische Auslösevorrichtung Download PDF

Info

Publication number
EP2058831A1
EP2058831A1 EP08305783A EP08305783A EP2058831A1 EP 2058831 A1 EP2058831 A1 EP 2058831A1 EP 08305783 A EP08305783 A EP 08305783A EP 08305783 A EP08305783 A EP 08305783A EP 2058831 A1 EP2058831 A1 EP 2058831A1
Authority
EP
European Patent Office
Prior art keywords
pallet
armature
winding
closed
electromagnetic
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
EP08305783A
Other languages
English (en)
French (fr)
Other versions
EP2058831B1 (de
Inventor
Patrice Joyeux
Edouard Dezille
Albert Foggia
Frédéric Wurtz
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.)
Hager Electro SAS
Original Assignee
Hager Electro 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 Hager Electro SAS filed Critical Hager Electro SAS
Publication of EP2058831A1 publication Critical patent/EP2058831A1/de
Application granted granted Critical
Publication of EP2058831B1 publication Critical patent/EP2058831B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01H71/323—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements with rotatable armature

Definitions

  • the present invention relates to an electromagnetic tripping device or relay, that is to say a micro-actuator which, powered by a low electrical energy, is capable of providing a high mechanical energy.
  • This type of device combines two functions: an electrical function, because the relay is a complex impedance inserted into the fault current detection circuit. Furthermore, the relay has a mechanical function, since from a certain triggering criterion on the voltage and current, it must release sufficient mechanical energy to unlock a lock.
  • the permanent magnet creates a flux in the magnetic circuit that generates forces at the gaps between the pallet and the frame. These forces are in principle sufficiently important to oppose the action of the return means, in general a spring, and thus keep the pallet glued against the magnetic armature.
  • the impedance of the relay which is extremely sensitive to the value of the gap.
  • This impedance depends in fact on the resistance of the wire, but also on the inductance of the coil.
  • the latter depends on the magnetic circuit, and in particular the reluctance of the magnetic circuit seen by the coil.
  • This reluctance itself depends directly on the value of the air gap between the pallet and the armature, which leads to rectify the pallet and the magnetic armature to control a minimum air gap.
  • Such an objective is difficult to achieve, and involves a high cost.
  • the invention proposes to remedy these drawbacks by proposing new configurations of magnetic circuits, that is to say of the entire magnetic armature / pallet, which notably eliminate the need to perform a grinding of these parts.
  • the armature defines at least one closed magnetic circuit, traversed by a magnetic field generated by the winding or windings in the opposite direction to that created by the magnet on a portion of said circuit, and includes minus two shunts or "plug” zones saturated by the magnetic flux generated by the permanent magnet, said shunts or "plug” zones being arranged between the winding (s) and the zone presenting the pallet and air gaps.
  • the armature comprises a central window closed-circuit part comprising at least one winding and at least two shunts.
  • this closed circuit portion may be rectangular, one side of the rectangle having a winding and the two parallel adjacent sides forming two shunts.
  • This configuration is particularly practical in terms of manufacture / bulk, and it allows the implementation of multiple variants for the positioning of the magnet, the possibilities of pallets, etc.
  • the permanent magnet and the movable pallet may be arranged outside the two sides forming a shunt.
  • the magnet is rectangular, it can then be surrounded on three sides by a U-shaped portion of the armature whose base is formed by one of the shunt-forming sides. .
  • this configuration can better channel the field lines due to the permanent magnet.
  • the parallel sides of the rectangle, one of which comprises the winding extend into two branches, the free ends of which form two gaps with the pallet.
  • the pallet comprises two active surfaces, that is to say two surfaces creating, with surfaces opposite the armature, two homologous air gaps.
  • the pallet may have two flat free ends parallel to the outer face of the side of the shunt rectangle, located in the extension of the parallel sides of the rectangle, one of which comprises the winding.
  • said pallet may be in U.
  • the "plug" zones are the equivalents of the two shunts, in this case placed a little differently because they are no longer part of the main closed circuit in which the coil is wound.
  • the characteristics and effects of this magnetic circuit match those of the configurations that have been presented before.
  • one of the sides the portion surrounding the magnet has two branches with beveled ends facing, forming a space for a trapezoidal or triangular pallet.
  • the branches orienting towards each other in order to create the two gaps can be disjointed.
  • the magnetic armature and the pallet are preferably made from magnetic materials in sintered powder.
  • This embodiment is very advantageous, especially economically, because it avoids difficult and expensive grinding operations.
  • the electromagnetic release device or relay of the invention comprises a frame (1) having substantially the shape of a house.
  • this armature (1) comprises a permanent magnet (2), which creates a permanent flux in the magnetic circuit of the armature generating forces at the gaps between the armature (1) and the pallet (3). ). This is located at the top of the "roof" of the house, between two homologous branches (4) and (5) of the armature (1) developing towards each other.
  • the flux of the permanent magnet (2) has been symbolized in solid lines, whereas the flux coming from the coil is symbolized in dashed lines.
  • the main circuit seen by the coil which includes the two shunts (7) and (8), is closed.
  • these shunts (7) and (8) are saturated, which is the case in normal operation due to the choice of the magnet (2) and the sizing of the shunts (7) and (8), the reluctances of the latter are almost constant, even when there is some variation in the gaps or magnetization of the magnet.
  • the reluctance seen by the coil is therefore almost independent of the value of the gap, hence a possibility of having much greater tolerances for both the gap and for its variation.
  • the magnet hardly sees any fluctuation when the palette opens.
  • the pallet (3) has two air gaps, at the surfaces at the ends of the branches (4) and (5). The interest of these two surfaces is evident in terms of the decomposition of forces.
  • the force exerted by the spring to take off the pallet (3) of the armature (1) can be decomposed into two distinct forces, necessarily much less than the single force that would be necessary with a only gap, and to reduce the degree of saturation required in the frame.
  • FIG. 1 The Figures 2 to 4 show variations in the configuration of the figure 1 . That of figure 2 comprises a circular blade (3 '), whereas the branches (4) and (5) of the example illustrated in FIG. figure 3 are reduced to a rectilinear portion extending the sides of the rectangle perpendicular to the shunt sides (7, 8), and cooperating with a rectilinear pallet (3 ") Finally, the variant appearing in figure 4 shows a U-shaped pallet (23), that is to say integrating the branches (14) (15).
  • the figure 5 shows a possible variant to the previous configuration, but which meets the same objectives.
  • the elements identical to those of the figure 1 bear the same references.
  • the pallet is not shown, to facilitate viewing of the end surfaces of the limbs (4) and (5), which are in this case beveled surfaces or inclined (11) and (12).
  • the permanent magnet (2) is totally surrounded by the armature (1), that is to say that the free ends of the extensions (9) and (10) are connected by an additional side of the referenced armature ( 13).
  • the channelization of the magnetic field lines generated by the permanent magnet (2) is even better, in this case, than for that of the figure 1 .
  • the advantage of this structure is that it is not necessary to saturate the closed part seen by the coil (6), that is to say the sides (7) and (8) joining the side around which is wound the coil (6) on the one hand, and the side vis-à-vis the other hand. It is however necessary, in this case, to saturate the "plug" zones (7 ') and (8') as well as the zone (13) so that the coil does not see or almost not the circuit of the pallet and of the permanent magnet (2).

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Lubricants (AREA)
  • Breakers (AREA)
EP08305783A 2007-11-07 2008-11-07 Elektromagnetische Auslösevorrichtung Not-in-force EP2058831B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0707824A FR2923322B1 (fr) 2007-11-07 2007-11-07 Dispositif de declenchement electromagnetique.

Publications (2)

Publication Number Publication Date
EP2058831A1 true EP2058831A1 (de) 2009-05-13
EP2058831B1 EP2058831B1 (de) 2010-06-09

Family

ID=39473252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08305783A Not-in-force EP2058831B1 (de) 2007-11-07 2008-11-07 Elektromagnetische Auslösevorrichtung

Country Status (5)

Country Link
EP (1) EP2058831B1 (de)
AT (1) ATE470947T1 (de)
DE (1) DE602008001475D1 (de)
ES (1) ES2347203T3 (de)
FR (1) FR2923322B1 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095715A2 (en) * 2006-02-24 2007-08-30 TINOCO SOARES Jr. José Carlos Electric switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095715A2 (en) * 2006-02-24 2007-08-30 TINOCO SOARES Jr. José Carlos Electric switch

Also Published As

Publication number Publication date
DE602008001475D1 (de) 2010-07-22
EP2058831B1 (de) 2010-06-09
FR2923322B1 (fr) 2009-11-27
ATE470947T1 (de) 2010-06-15
FR2923322A1 (fr) 2009-05-08
ES2347203T3 (es) 2010-10-26

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