• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an electromagnetic actuator comprising a magnetic circuit consisting of a stationary magnetic armature and a blade, said blade being movable in opposition to a spring and capable of moving a mechanical actuating member, and an induction coil arranged about an arm of the armature, the assembly being inserted into a housing from which the mechanical member extends. The housing comprises a through-slot located inside a magnetic circuit, in which through-slot the coil is wound once the housing is closed.
    公开号:AU2013224792A1
    申请号:U2013224792
    申请日:2013-02-28
    公开日:2014-10-16
    发明作者:Vincent BOITEUX；Edouard Dezille；Pascal FRITSCH；Jean-Marc Voirpin
    申请人:Hager Electro SAS；
    IPC主号:H01F5-02
    专利说明:
    1 ELECTROMAGNETIC ACTUATOR HAVING AN OUTER COIL The present invention relates to an electromagnetic actuator of the differential relay type, and pertains to the actuator itself as well as a method for 5 assembling such a device. The actuator according to the invention is a highly sensitive device, used in particular in the field of differential protection, when it is considered independently from the voltage sector. In this context, the actuators or differential relays used in the industry or service sectors are of different types in order to be able to meet the standards in 10 force (differential products of type A, AC, G, S, etc.). However, they are geometrically identical, i.e., the parts making them up are the same, with the exception of the coil, the number of turns and wire section of which are adapted to each relay type described above. In practice, there are at least two different types of relay obeying different practices. 15 This type of electromagnetic actuator in fact traditionally comprises: - a fixed magnetic armature, which is generally U-shaped, whereof the ends of the two legs are made up two coplanar polar surfaces; - a blade made from a magnetic material able to pivot between two positions respectively at a distance, i.e., allowing an air gap to remain with the 20 armature and, in the armed position of the trigger, in contact with said polar surfaces, thereby closing the magnetic circuit formed by said armature and said blade, the point of rotation of the blade being situated in the immediate vicinity of the end of one of the legs of the armature; - a permanent polarization magnet of the magnetic circuit, positioned 25 between the legs of the armature and creating a permanent magnetic attraction force of the blade toward the polar surfaces, that magnetic force being exerted against a return force of a spring; - an induction coil surrounding the magnetic circuit, for example connected to a circuit to be controlled, in order to modify the initial equilibrium between the 30 magnetic force and the return force of the spring. It is this coil that constitutes and in fact makes it possible to vary the impedance of the relay, which is consequently different from one type of relay to 2 another if the coils are different in terms of number of turns and section of the wire, able to go from the order of about 1 Q for relays with a low impedance to a more traditional value of approximately 40 ) chosen in most activation calibers and sensitivities, and able to go up to high values such as 2000 0. 5 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 wire of the coil, the flow created on that occasion in the magnetic circuit by the coil combines with the flow generated by the permanent magnet. The combination of the flows induced by the magnet on 10 the one hand, and by the current having appeared in the coil on the other hand, destroys the initial mechanical equilibrium and causes the blade to pivot, the latter being attracted into contact with the end polar surfaces of the armature. The movement of the blade causes that of a mechanical member, for example a rod able to unlock the lock of a differential product placed near the electromagnetic 15 actuator, such that said rod can act on an activator. The coil being the only difference between the different types of relays, thus far it constitutes a component to be chosen during the assembly of the relay. In industrial assembly chains, the step for assembling the coil comes into play fairly early in most cases, i.e., the coil selected for the product during assembly is 20 mounted during the first phases from inventories of different available coils. In order to better meet market demands, it is then necessarily required to produce the different types of relays so as to have all of them in inventory at all times. This is not wise in terms of manufacturing, or storage, with all of the negative financial impacts that those operations involve. 25 To resolve this problem, and at the same time simplify the industrialization of said relays, the device and the method according to the invention enable the unified manufacture of the entire actuator except the coil, which is added on request, on a just-in-time basis, at the end of assembly of the product. In other words, the electromagnetic actuator according to the invention, 30 which essentially includes a magnetic circuit made up of a fixed magnetic armature and a blade moving against a spring and able to move a mechanical actuating member, and an induction coil positioned around a branch of the 3 armature, the assembly being inserted into a housing from which the mechanical member protrudes, is characterized in that the housing includes a through aperture located inside the magnetic circuit, in which the coil is wound once the housing is closed. 5 This aperture, which is delimited by the inner faces of the housing, is located near at least one outer side of said housing, the coil then being wound around a branch of the housing containing a portion of the magnetic armature and separating the aperture from the proximal outer side of the housing. The aperture is in practice completely delimited by the housing, which is 10 completely closed, having inner faces on the periphery of the aperture. According to one possible configuration, this aperture may be in the shape of a U emerging in an outer side of the housing, and barred near said side by a bar formed in the housing and surrounding a portion of the magnetic armature. In this case, the part of the housing forming the bar is thinner than the rest of the housing 15 and situated withdrawn relative to the adjacent outer side of said housing, and it constitutes a very natural base for coiling a winding. According to one possibility, the coil can nevertheless be wound on a support comprising a cylindrical sleeve surrounding the bar and at least two end flanges. 20 In order to be able to position the coil on the bar, the coil support can be made up of two parts that can be assembled in a direction parallel to the axis of the sleeve. They are fastened to each other after the bar has been placed between the two half-sleeves. Alternatively, the coil support can be made in a single piece of a flexible 25 elastic material provided with a radial slit formed in the flanges and the sleeve. In that case, the slit is elastically widened for the passage of the bar, the elasticity of the material next resulting in closing the slit and capturing the bar. In order to impart a rotation to the coil support for coiling of the coil, the periphery of at least one flange can be toothed. Said support can then be rotated 30 by a toothed outer drive wheel. Before any rotation, it is, however, important to fasten the end of the wire to be coiled to the coil support. According to one possibility, two adjacent flanges can 4 equip one of the ends of the sleeve to that end. The wire is then wound over several turns, and is self-fastened to the support by jamming between the two flanges, which are situated very close to one another. Alternatively, one of the two ends of the sleeve can protrude from a flange, 5 the axial dimension of the coil being substantially equal to that of the bar. In that case, the two adjacent flanges of the preceding solution are in practice replaced by a flange and an inner wall of the aperture, the fastening obeying the same principle as before because the protruding end of the sleeve is provided to be very short and the wall is therefore very close to the flange. 10 According to still another possible alternative, the outer face of a flange may be provided with at least one hook, preferably two hooks situated symmetrically relative to the axis of the support, and around which a first coiling over several turns achieves the same result as before: a fastening of the wire with no restrictive mechanical operation. 15 Lastly, still to the same end, at least one of the flanges can include a metal pellet on its outer face. The latter is then used for the welding of the end of a wire to be coiled. The invention also relates to a method for manufacturing an electromagnetic actuator obeying the preceding characteristics, which essentially 20 includes the following steps: - assembling the armature, the blade, the spring and the mechanical member inside the housing; - closing the housing; - winding the coil through the aperture of the housing. 25 The importance has previously been noted of leaving the installation of the coil for last, which is only possible because the housing is provided to that end, i.e., in practice provided with an inner through aperture. In the case where the actuator according to the invention includes a coil support, the method is more precisely the following: 30 - after the housing is closed, a coil support is placed around a branch of the housing separating the aperture and an outer side of the housing; - a conductive wire is fastened to said support; and 5 - said support is rotated to perform the coiling. In practice, as previously mentioned, the support is set in rotation using at least one flange, actuated by a toothed wheel if it is toothed, or by a friction wheel if it is not. 5 In the alternative in which there is no coil support, which is also possible, it is necessary to use a winding template that is used to wind the wire directly on the branch, and the method then includes the following steps: - after the housing is closed, a winding template is placed around a branch of the housing separating the aperture and an outer side of the 10 housing; - a conducting wire is fastened to said template; - said template is rotated to wind the length of wire necessary for the coil; then, secondly - the wire is simultaneously unwound from the template and wound 15 around the branch of the housing separating the aperture and the proximal outer side of the housing; and - the template is removed from the branch. In that case, the wire necessary for the coil is therefore wound first on the template before being wound directly on the housing. In practice, the winding 20 template assumes the form of a coil support that does not remain on the branch, but simply serves to transfer the wire onto said branch. Without it, it would be necessary to pass the end of the wire into the aperture for each revolution to be performed, which is industrially unwise. Other advantages and features will emerge more clearly from the following 25 description of one particular embodiment of the invention, provided as a non limiting example, and shown in the appended drawings, in which: - figure 1 shows a perspective view of an actuator whereof the coil is mounted according to the criteria of the invention; and - figure 2 diagrammatically shows an example coil support in two parts. 30 In reference to figure 1, the housing (1) is in an arched shape with a through aperture (2) in the shape of an upside down U and a bar (3) that encloses a portion of the magnetic armature (not shown). The housing (1) is completely 6 closed, which means that the inner faces delimiting the U are closed walls of the housing (1), as are the outer sides. The upper outer side (4) also includes the only opening formed in the housing (1), an orifice (5) allowing the passage of a rod (6) of the actuator, the mechanical power of which makes it possible for example to 5 activate the mechanical lock of the differential electric apparatus. 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) thereon, as very diagrammatically shown in figure 2. Such a coil support (7) is made of two parts (8, 8'), in the case at hand 10 formed symmetrically according to one possible configuration, able to be assembled on either side of the bar (3). The fastening of one part (8, 8') to the other (8', 8) can in practice be done without additional elements, by simple interlocking of studs or spurs protruding from one of the parts (8, 8') and forcibly adjustment in orifices of the upper part (8', 8). 15 When the coil support (7) is installed, one end of the wire to be wound is fastened thereto, then the support (7) is set in rotation around the bar (3) such that the coil is progressively created, turn after turn obtained for each complete revolution of the coil support (7). From a dimensional perspective, the length of the support (7), from one end of the flange (9) to the other (9'), and the through 20 dimensions of the channel delimited by the central sleeve (10), are provided such that the coil support (7) rotates freely around the bar (3). Of course, the above example must not be considered exhaustive with respect to the invention, which on the contrary includes a set of alternative shapes and configurations such as the lining of one of the flanges (9, 9') in order to fasten 25 one end of the wire to be wound, the production of a support (7) in one piece provided with a radial slit according to a configuration shown in figure 2 if the parts in dotted lines (11) were solid extensions of the support (7) according to the first version, non-symmetrical parts (8, 8'), etc.
    权利要求:
    Claims (15)
    [1] 1. An electromagnetic actuator including a magnetic circuit made up of: 5 - a fixed magnetic armature having at least one polar surface; - a blade moving against a spring and able to move a mechanical actuating member (6); and - a permanent polarization magnet of the magnetic circuit creating a permanent magnetic force attracting the blade toward the polar surface 10 of the armature, and an induction coil positioned around a branch of the armature, the assembly being inserted into a housing (1) from which the mechanical member (6) protrudes, characterized in that the housing (1) includes a through aperture (2) located inside the magnetic circuit, in which the coil is wound once the housing 15 (1) is closed.
    [2] 2. The electromagnetic actuator according to the preceding claim, characterized in that said aperture (2), which is delimited by the inner faces of the housing (1), is located near at least one outer side of said housing (1), the coil then being wound around a branch (3) of the housing (1) containing a portion of the 20 magnetic armature and separating the aperture (2) from the proximal outer side of the housing (1).
    [3] 3. The electromagnetic actuator according to the preceding claim, characterized in that the aperture (2) is in the shape of a U emerging in an outer side of the housing (1), and barred near said side by a bar (3) formed by the housing (1) 25 and surrounding a portion of the magnetic armature.
    [4] 4. The electromagnetic actuator according to the preceding claim, characterized in that the coil is wound on a support (7) comprising a cylindrical sleeve (10) surrounding the bar (3) and at least two end flanges (9, 9').
    [5] 5. The electromagnetic actuator according to the preceding claim, characterized 30 in that the coil support (7) is made up of two parts (8, 8') that can be assembled in a direction parallel to the axis of the sleeve (10). 8
    [6] 6. The electromagnetic actuator according to claim 4, characterized in that the coil support (7) is made in a single piece of a flexible elastic material provided with a radial slit formed in the flanges (9, 9') and the sleeve (10).
    [7] 7. The electromagnetic actuator according to one of claims 5 and 6, characterized 5 in that the periphery of at least one flange (9, 9') is toothed.
    [8] 8. The electromagnetic actuator according to one of claims 4 to 6, characterized in that two adjacent flanges equip one of the ends of the sleeve (10).
    [9] 9. The electromagnetic actuator according to one of claims 4 to 6, characterized in that one end of the sleeve (10) protrudes from a flange (9, 9'), the axial 10 dimension of the coil being substantially equal to that of the bar (3).
    [10] 10. The electromagnetic actuator according to one of claims 4 to 6, characterized in that the outer face of a flange (9, 9') is provided with at least one hook.
    [11] 11. The electromagnetic actuator according to one of claims 4 to 6, characterized in that at least one of the flanges (9, 9') includes a metal pellet on its outer 15 face.
    [12] 12.A method for manufacturing an electromagnetic actuator according to the preceding claims, characterized by the following steps: - assembling the armature, the blade, the spring and the mechanical member (6) inside the housing; 20 - closing the housing (1); - winding the coil through the aperture of the housing (1).
    [13] 13.The method for manufacturing an electromagnetic actuator according to the preceding claim, characterized in that: - after the housing (1) is closed, a coil support (7) is placed around a 25 branch (3) of the housing (1) separating the aperture (2) and an outer side of the housing (1); - a conductive wire is fastened to said support (7); and - said support (7) is rotated to perform the coiling.
    [14] 14.The method for manufacturing an electromagnetic actuator according to the 30 preceding claim, characterized in that the support (7) is set in rotation using at least one flange (9, 9'), actuated by a toothed wheel if it is toothed, or by a friction wheel. 9
    [15] 15.The method for manufacturing an electromagnetic actuator according to claim 12, characterized in that: - after the housing (1) is closed, a winding template is placed around a branch (3) of the housing (1) separating the aperture (2) and an outer 5 side of the housing (1); - a conducting wire is fastened to said template; - said template is rotated to wind the length of wire necessary for the coil; then, secondly - the wire is simultaneously unwound from the template and wound 10 around the branch (3) of the housing (1) separating the aperture (2) and the proximal outer side of the housing (1); and - the template is removed from the branch (3).
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    同族专利:
    公开号 | 公开日
    AU2013224792B2|2016-04-07|
    WO2013128127A1|2013-09-06|
    FR2987491A1|2013-08-30|
    CN104246922B|2016-12-07|
    IN2014MN01890A|2015-07-10|
    PT2820658T|2016-07-18|
    ES2583931T3|2016-09-22|
    PL2820658T3|2016-10-31|
    EP2820658A1|2015-01-07|
    EP2820658B1|2016-04-27|
    CN104246922A|2014-12-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1266062A|1960-07-22|1961-07-07||Process for forming coils on iron cores|
    DE1916637A1|1969-04-01|1970-10-08|Herbert Ruff|Method for winding closed cores|
    DE3216181A1|1982-04-30|1983-11-03|Brown, Boveri & Cie Ag, 6800 Mannheim|ERROR INTERRUPT RELEASE WITH A WINDED COIL, METHOD FOR WINDING THE COIL AND DEVICE FOR IMPLEMENTING THE METHOD|
    DE8524828U1|1985-08-30|1987-07-09|Brown, Boveri & Cie Ag, 6800 Mannheim, De||
    AT414183B|1994-06-08|2006-10-15|Tyco Electronics Austria Gmbh|BISTABLE SWITCHING DEVICE|
    DE102004047738A1|2004-09-30|2006-05-04|Siemens Ag|Trigger relay device for a protective switching device|
    法律状态:
    2016-08-04| FGA| Letters patent sealed or granted (standard patent)|
    优先权:
    申请号 | 申请日 | 专利标题
    FR1251863A|FR2987491A1|2012-02-29|2012-02-29|ELECTROMAGNETIC ACTUATOR WITH EXTERNAL WINDING|
    FR1251863||2012-02-29||
    PCT/FR2013/050415|WO2013128127A1|2012-02-29|2013-02-28|Electromagnetic actuator having an outer coil|
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