EP2820658A1 - Actionneur electromagnetique a bobinage externe - Google Patents
Actionneur electromagnetique a bobinage externeInfo
- Publication number
- EP2820658A1 EP2820658A1 EP13712870.8A EP13712870A EP2820658A1 EP 2820658 A1 EP2820658 A1 EP 2820658A1 EP 13712870 A EP13712870 A EP 13712870A EP 2820658 A1 EP2820658 A1 EP 2820658A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- electromagnetic actuator
- actuator according
- coil
- window
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/02—Coils wound on non-magnetic supports, e.g. formers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/44—Magnetic coils or windings
- H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former
Definitions
- the present invention relates to an electromagnetic actuator of the differential relay type, and relates to the actuator itself and a method of mounting such an apparatus.
- the actuator of the invention is a high sensitivity device, used in particular in the field of differential protection, when it is considered independently of the mains voltage.
- the actuators or differential relays used in industry or the tertiary sector are of different types in order to be able to meet the standards in force (differential products of type A, AC, G, S, etc.). Now, they are geometrically identical, ie the parts constituting them are the same, with the exception of the coil, whose number of turns and the section of the wire are adapted to each type of relay mentioned above. . In practice, there are at least two different types of relay that serve different purposes.
- This type of electromagnetic actuator in fact conventionally comprises:
- a fixed magnetic frame generally U-shaped, the ends of the two legs constitute two coplanar polar surfaces;
- a pallet of magnetic material capable of pivoting between two positions respectively at a distance, that is to say leaving an air gap with the armature and, in the armed position of the release, in contact with said polar surfaces, thus closing the magnetic circuit constituted by said armature and said pallet, the point of rotation of the pallet being in the immediate vicinity of the end of one of the legs of the armature;
- a permanent magnet for biasing the magnetic circuit, arranged between the legs of the armature and creating a permanent magnetic force for attracting the pallet towards the polar surfaces, magnetic force acting against a restoring force of 'a spring ;
- an induction coil surrounding the magnetic circuit connected for example to a circuit to be controlled, in order to modify the initial equilibrium between the magnetic force and the restoring force of the spring.
- this coil which constitutes and in fact makes it possible to vary the impedance of the relay, which is therefore different from one type of relay to another if the coils are distinct in terms of the number of turns and the wire section, able to pass from a value order of about 1 ⁇ for low impedance relays to a more conventional value of about 40 ⁇ chosen in most calibres and trip sensitivities, and likely to go up to high values of the type 2000 ⁇ .
- the operating principle which is well known, is the following: when, for example, a differential-order incident occurs in lines protected by the differential device, generating an induced current in the coil wire, the flux created on this occasion in the magnetic circuit by the coil combines with the flux generated by the permanent magnet.
- the combination of fluxes induced by the magnet on the one hand and by the current appeared in the coil on the other hand destroys the initial mechanical equilibrium and rotates the pallet, attracted in contact with the polar end surfaces of the armature. .
- the displacement of the pallet causes that of a mechanical member, for example a rod adapted to unlock the lock of a differential product placed near the electromagnetic actuator, so that said rod can act on a trigger.
- the coil is the only difference between the different types of relays, so it is a component to choose while mounting the relay.
- the device and the method of the invention make possible the unified manufacture of the entire actuator with the exception of the coil, which is added to demand, just in time, at the end of product assembly.
- the electromagnetic actuator according to the invention which essentially comprises a magnetic circuit consisting of a fixed magnetic armature and a movable pallet against a spring and able to move a mechanical actuating member , and an induction coil arranged around a branch of the armature, the assembly being inserted into a housing which exceeds the mechanical member, is characterized in that the housing comprises a through window located inside the magnetic circuit, wherein is wound the coil once the closed housing.
- This window delimited by internal faces of the housing, is located in the vicinity of at least one outer side of said housing, the coil then being wound around a branch of the housing enclosing a portion of the magnetic armature and separating the window of the proximal outer side of the housing.
- the window is in practice entirely delimited by the housing, which is completely closed, having internal faces at the periphery of the window.
- this window may be U-shaped opening into an outer side of the housing, and barred near said side by a bar formed by the housing and surrounding a portion of the magnetic armature.
- the portion of the housing constituting the bar is less thick than the rest of the housing and set back from the adjacent outer side of said housing, and it is a very natural basis for winding a winding.
- the coil may however be wound on a support comprising a sleeve of cylindrical shape surrounding the bar and at least two end flanges.
- the coil support may consist of two parts that can be assembled in a direction parallel to the axis of the sleeve. They are fixed to each other after the bar has been placed between the two half-sleeves.
- the coil support may consist of a single piece of elastic flexible material provided with a radial slot made in the flanges and the sleeve.
- the slot is elastically widened for the passage of the bar, the elasticity of the material then resulting in closing the slot and to imprison the bar.
- the periphery of at least one flange may be toothed. Said support can then be rotated by an external drive gear.
- two adjacent flanges can equip for this purpose one of the ends of the sleeve.
- the wire which is self-fastening to the support by wedging between the two flanges that are located very close to each other.
- one of the ends of the sleeve may protrude from a flange, the axial dimension of the coil being substantially equal to that of the bar.
- the two adjacent flanges of the previous solution are in practice replaced by a flange and an inner wall of the window, the fastener obeying the same principle as above because the end of the protruding sleeve is provided very short and the wall is so very close to the flask.
- the outer face of a flange may be provided with at least one hook, preferably two hooks located symmetrically with respect to the axis of the support, and around which one (s) a first winding on a few turns leads to the same result as before: a fixing of the wire without binding mechanical operation.
- At least one of the flanges may comprise, on its outer face, a metal pellet. This is then used for welding the end of a wire to be wound.
- the invention also relates to a method of manufacturing an electromagnetic actuator that obeys the above characteristics, which essentially comprises the following steps:
- the actuator of the invention comprises a coil support
- the method is more precisely the following:
- a coil holder is placed around a branch of the housing separating the window and an outer side of the housing;
- a conductive wire is fixed to said support
- the support is rotated to carry out the winding.
- the support is rotated by means of at least one flange, actuated by a toothed wheel if it is toothed, or by a friction wheel if it is not .
- a winding jig is set up around a branch of the housing separating the window and an outer side of the housing;
- a conductive wire is fixed to said template
- said jig is rotated to wind the length of yarn required by the spool; then in a second time
- the wire is simultaneously unwound from the template and wound around the branch of the housing separating the window and the proximal outer side of the housing;
- the wire required for the coil is wound firstly to the template before being directly on the housing.
- the winding jig is in the form of a coil holder which does not remain on the branch but simply serves to transfer the wire on said branch. Without it, it would be necessary to pass the end of the wire in the window for each tower to perform, which is industrially misguided.
- FIG. 1 shows in perspective view an actuator whose coil is mounted according to the criteria of the invention.
- FIG. 2 schematically shows an example of a two-part coil carrier.
- the casing (1) is in the form of an arch with an inverted U-shaped through-window (2) and a bar (3) which encloses a portion of the magnetic armature (not visible).
- the housing (1) is completely closed, which means that the inner faces defining the U are closed walls of the housing (1) as well as the outer sides.
- the outer side upper (4) also has the single opening in the housing (1), an orifice (5) for the passage of a rod (6) of the actuator, the mechanical power allows for example to trigger the mechanical lock of a differential electrical device.
- the coil associated with the actuator of the invention is, in this configuration, wound around the bar (3), for example after having placed a coil support (7) as shown very schematically in Figure 2.
- Such a coil carrier (7) consists of two parts (8, 8 '), formed in this case symmetrically in a possible configuration, assembled on either side of the bar (3).
- the fixing of a portion (8, 8 ') to the other (8', 8) can be carried out in practice without additional elements, by simple interlocking studs or pins protruding from one of the parts (8, 8 ') and forcing into holes in the other part (8', 8).
- the support (7) When the coil support (7) is installed, an end of the winding wire is fixed thereto, then the support (7) is rotated around the bar (3) so that the coil is created gradually, turns after turn obtained. for each complete revolution of the spool support (7). From a dimensional point of view, the length of the support (7), from one end flange (9) to the other (9 '), and the transverse dimensions of the channel delimited by the central sleeve (10) are provided such that the coil support (7) is free to rotate around the bar (3).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Electromagnets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1251863A FR2987491B1 (fr) | 2012-02-29 | 2012-02-29 | Actionneur electromagnetique a bobinage externe |
| PCT/FR2013/050415 WO2013128127A1 (fr) | 2012-02-29 | 2013-02-28 | Actionneur electromagnetique a bobinage externe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2820658A1 true EP2820658A1 (fr) | 2015-01-07 |
| EP2820658B1 EP2820658B1 (fr) | 2016-04-27 |
Family
ID=48014082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13712870.8A Active EP2820658B1 (fr) | 2012-02-29 | 2013-02-28 | Actionneur electromagnetique a bobinage externe |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP2820658B1 (fr) |
| CN (1) | CN104246922B (fr) |
| AU (1) | AU2013224792B2 (fr) |
| ES (1) | ES2583931T3 (fr) |
| FR (1) | FR2987491B1 (fr) |
| IN (1) | IN2014MN01890A (fr) |
| PL (1) | PL2820658T3 (fr) |
| PT (1) | PT2820658T (fr) |
| WO (1) | WO2013128127A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1266062A (fr) * | 1960-07-22 | 1961-07-07 | Procédé pour former les bobines sur des noyaux de fer | |
| DE1916637A1 (de) * | 1969-04-01 | 1970-10-08 | Herbert Ruff | Verfahren zum Bewickeln von geschlossenen Kernen |
| DE3216181A1 (de) * | 1982-04-30 | 1983-11-03 | Brown, Boveri & Cie Ag, 6800 Mannheim | Fehlerstormausloeser mit einer gewickelten spule, verfahren zum bewickeln der spule und vorrichtung zur durchfuehrung des verfahrens |
| DE8524828U1 (de) * | 1985-08-30 | 1987-07-09 | Brown, Boveri & Cie Ag, 6800 Mannheim | Fehlerstromauslöser |
| AT414183B (de) * | 1994-06-08 | 2006-10-15 | Tyco Electronics Austria Gmbh | Bistabile schaltvorrichtung |
| DE102004047738A1 (de) * | 2004-09-30 | 2006-05-04 | Siemens Ag | Auslöserelaisvorrichtung für ein Schutzschaltgerät |
-
2012
- 2012-02-29 FR FR1251863A patent/FR2987491B1/fr not_active Expired - Fee Related
-
2013
- 2013-02-28 IN IN1890MUN2014 patent/IN2014MN01890A/en unknown
- 2013-02-28 PL PL13712870.8T patent/PL2820658T3/pl unknown
- 2013-02-28 WO PCT/FR2013/050415 patent/WO2013128127A1/fr not_active Ceased
- 2013-02-28 PT PT137128708T patent/PT2820658T/pt unknown
- 2013-02-28 AU AU2013224792A patent/AU2013224792B2/en not_active Ceased
- 2013-02-28 CN CN201380020066.0A patent/CN104246922B/zh not_active Expired - Fee Related
- 2013-02-28 ES ES13712870.8T patent/ES2583931T3/es active Active
- 2013-02-28 EP EP13712870.8A patent/EP2820658B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013128127A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2987491A1 (fr) | 2013-08-30 |
| AU2013224792B2 (en) | 2016-04-07 |
| WO2013128127A1 (fr) | 2013-09-06 |
| IN2014MN01890A (fr) | 2015-07-10 |
| CN104246922B (zh) | 2016-12-07 |
| ES2583931T3 (es) | 2016-09-22 |
| PT2820658T (pt) | 2016-07-18 |
| EP2820658B1 (fr) | 2016-04-27 |
| PL2820658T3 (pl) | 2016-10-31 |
| CN104246922A (zh) | 2014-12-24 |
| FR2987491B1 (fr) | 2022-02-25 |
| AU2013224792A1 (en) | 2014-10-16 |
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