POSITION SENSOR ROUTING SUPPORT, MAGNETIC BEARING MODULE AND MANUFACTURING METHOD

Abstract

MAGNETIC BEARING MODULE ROUTING SUPPORT, MAGNETIC BEARING MODULE AND MANUFACTURING METHOD This routing support (3) for a cable (14) for a magnetic bearing module position sensor (10), said magnetic bearing module position sensor (10) comprising an arrangement of coils (11) wound in spools and an insulation displacement contact (12), said routing support (3) comprising a routing track for said cable (14) and openings (4) configured to permit insertion of said cable (14) into the insulation displacement contact (12) through some of the openings (4) when the routing support (3) is positioned opposite said magnetic bearing module position sensor (10); magnetic bearing module (1) comprising such a routing support (3), and a manufacturing method for such a magnetic bearing module (1). Figure for the abstract: [Fig 1]

Description

Title of the invention: POSITION SENSOR ROUTING SUPPORT, MAGNETIC BEARING MODULE AND MANUFACTURING METHOD Technical field of the invention

[0001] The present invention relates to a magnetic bearing module, which includes a position sensor and a magnetic bearing, and a method for manufacturing such a module.

[0002] The present invention aims to constitute a magnetic bearing module which includes a routing support for a position sensor. Prior art

[0003] A magnetic bearing module of a system, such as an industrial machine, classically comprises a position sensor and one or more magnetic bearings.

[0004] Cable routing on a support coupled with crimping these cables by an insulation displacement contact makes it possible to create the circuit of a position detector for magnetic bearing in a simple and quick way while ensuring electrical insulation.

[0005] To satisfy the conditions mentioned above, two wiring methods are classically used: connections made manually called splices or the use of a printed circuit board, or "PCB" for the anglicism "Printed Circuit Board".

[0006] The method of manually splicing connections between enameled wires and cables or between enameled wires, requires intermetallic brazing, an insulation step and a manual mechanical positioning step, followed by one or more impregnations with a varnish for bonding and electrical insulation of the assembly, then cleaning of the mechanical interfaces for positioning of the assembly in a magnetic bearing module.

[0007] This method is not automatable, therefore difficult to replicate, laborious, and unreliable.

[0008] The method of using a PCB, in which the enameled wires can be soldered directly onto the printed circuit board or onto a pin through the board, requires that the cables can also be soldered directly or via a connector with through pins, all of which must be held with screwed or crimped fasteners, and generally additional overmolding as mechanical protection and / or as electrical insulation.

[0009] This method is particularly expensive, as it requires complex production steps and tools, and prevents the modularity of production tools, which are fixed to a PCB model.

[0010] The invention aims to provide a magnetic bearing module whose assembly can be done in an automatic line in a robotic station, greatly reducing the manufacturing time of the module, while allowing dimensional adaptation of the production tools according to the dimensions of the desired magnetic bearing modules.

[0011] The invention also makes it possible to avoid additional overmolding or impregnation for mechanical and / or electrical protection of the PCB onto which the enameled winding wire is directly soldered or connected, operations which are lengthy and delicate due to the use of chemicals and the associated curing and cleaning times. Summary of the invention

[0012] The invention aims to overcome at least some of the aforementioned drawbacks and to provide a cable routing support for a position sensor for a magnetic bearing module, and the method for manufacturing such a module, capable of combining advantages of speed, simplicity and reliability for their implementation, and this over a wide range of magnetic bearing dimensions.

[0013] In view of the foregoing, the invention relates to a cable routing support for a magnetic bearing module position sensor, said magnetic bearing module position sensor comprising an arrangement of coils wound in reels and an insulation displacement contact, said routing support comprising a routing track for said cable and openings configured to permit the passage and insertion of said cable into the insulation displacement contact through some of the openings when the routing support is positioned opposite said magnetic bearing module position sensor.

[0014] The routing track is formed on the routing support by a plurality of protrusions and / or screen prints configured to delimit support surfaces forming points of passage or position of said cable for its path along the routing support.

[0015] This routing track simplifies the manufacturing process of magnetic position detectors by using standard insulation displacement contacts, precise coil positioning with keying, and a lightweight and easy-to-implement cable routing support that eliminates the need for complex chemical processes, improves thermal and chemical resistance to the cable and coils of the module, and allows for modular production with a limited risk of error, faster and more environmentally friendly.

[0016] Above all, this method of pre-wiring the routing support, coupled with insulation displacement contact technology, drastically reduces the time required for the very tedious connection steps, making its manufacturing process more reliable and self-sufficient. customizable, but above all flexible on demand since the manufacture of this modular support in length and cable dimensions allows increasing the number of references compatible with the same support for a longer or shorter cable installed in the same way on this support.

[0017] Preferably, the routing support includes at least one retaining slot configured to pinch the cable for insertion into the insulation displacement contact through the opening.

[0018] For example, the routing support has two retaining slots placed on either side of the opening.

[0019] Advantageously, the routing support includes passages for translational guide pads subjected to the position sensor for magnetic bearing module.

[0020] The protrusions are for example formed protruding on the same side of the routing plate for the routing of the cable along the routing support from and to a connector of the routing support.

[0021] The support may have several routing tracks for several cables, and for each routing track, the protrusions and / or silkscreens arranged so as to hold laterally intermittently and on both sides the cable placed on that routing track.

[0022] According to one embodiment, an assembly comprising a routing support and a cable arranged on the routing track is provided on the one hand; and on the other hand, a magnetic bearing module comprising a magnetic bearing coupled to a position sensor and an assembly comprising a routing support mounted on said sensor and a cable arranged on the routing track, then the cover is added to the routing support by passing said cover through the translational guide pads, then the tight retention of said cover against the routing support and of said routing support against said position sensor is ensured by anti-loosening fastening means.

[0023] In one embodiment, the position sensor includes translational guide pads having a shape of revolution with an axis parallel to an axis of revolution of said position sensor and passing through the passages.

[0024] The invention also relates to a method of manufacturing such a magnetic bearing module, during which the cable is inserted into the insulation displacement contact either by means of a pusher tool having a support head which is passed through the opening by pushing said cable, or by means of the cover of the routing support which itself passes through the opening by pushing said cable.

[0025] Preferably, the manufacturing process further provides that the routing support is assembled onto the position sensor by guiding it with the guide pads. translation that is inserted into the passages. Brief description of the figures

[0026] The invention will be better understood upon detailed study of an embodiment taken by way of non-limiting example and illustrated by the accompanying drawings, in which:

[0027] [Fig-1] represents a section of a position sensor of a bearing module genetics without the routing support of a cable.

[0028] [Fig.2] represents the cable routing support for the position sensor, in front view.

[0029] [Fig.3] represents a part of the position sensor in perspective view.

[0030] [Fig.4] represents a cross-sectional view in which a part of maintenance of the prior art cable.

[0031] [Fig.5] represents a cross-sectional view of the use of the cable routing cover for the insertion of this cable into an insulation displacement contact of the magnetic bearing module.

[0032] [Fig.6] represents a perspective view of the cable insertion tool in an insulation displacement contact of the magnetic bearing module.

[0033] [Fig.7] represents another cross-sectional view of the use of the cable routing cover for holding this cable in an insulation displacement contact of the position sensor. Detailed description of the invention

[0034] [Fig.1] illustrates a magnetic bearing module 1, without its cable routing support 3, and intended to receive such a cable routing support 3 as illustrated by [Fig.2].

[0035] The magnetic bearing module 1 comprises a magnetic bearing and a position sensor 10 coupled to said magnetic bearing by means of connection such as screws 9, and a cable routing support 3 assembled on said position sensor 10.

[0036] The position sensor 10 comprises an arrangement of coils 11 wound in coillets and at least one insulation displacement contact 12.

[0037] Fig. 2 illustrates said routing support 3 according to the invention, forming for example a plate or a shell, allowing the routing of a cable 14.

[0038] The routing support 3 is configured to be assembled on the position sensor 10 of [Fig.1] on which no cable routing support 14 has been mounted.

[0039] By "cable 14" is referred indiscriminately to one or more flexible cables passing through or intended to pass through the routing track, and comprising for example an enameled wire and / or a multi-strand cable.

[0040] The routing support 3 differs from prior art electrical routing methods, consisting of manual assembly of the wiring or a printed circuit board for the circuit. electrical connection, in that it comprises a routing track for said cable 14 and openings 4 configured to allow the insertion of said cable 14 into the insulation displacement contact 12 through some of the openings 4 when the routing support 3 is positioned opposite said position sensor for magnetic bearing module 1. Each opening 4 is formed on the routing support 3 by protrusions and is open on the side opposite said routing support. Each opening 14 is, for example, rectangular in shape, so as to accommodate the shape of the insulation displacement contact 12.

[0041] The routing track is formed on the routing support 3 by at least a plurality of protrusions and / or silkscreens 2 configured to delimit support surfaces for said cable 14 for its path along the routing support 3.

[0042] The protrusions and / or silkscreens 2 are arranged to form the routing track which extends over the entire circumference of the plate formed by the routing support 3.

[0043] For each routing track, the protrusions and / or screen prints 2 are, for example, spaced apart from each other in the circumferential direction, which makes it possible to limit the amount of material used and to lighten the part.

[0044] For each track, the protrusions and / or silkscreens 2 are arranged so as to hold the cable 14 laterally by two of its sides, which allows optimal support despite the different successive orientations of the cable 14.

[0045] Each track can meander on the plate formed by the routing support 3, extending in an arc on it.

[0046] The routing track forms, for example, a loop which thus allows the routing of said cable 14 to several of the coils 11 through the openings 4, from and to a single output 7, such as a connection terminal block or a connector, configured to make the electrical connection between the magnetic bearing module 1 and an external system on which it is installed, such as an industrial machine.

[0047] All these connections make it possible to create the radial and / or axial detection circuit(s) included in the position sensor 3.

[0048] The protrusions 2 are for example supplemented by screen prints 2 projecting on the same side of the routing plate 3 to help the routing of the cable 14 along the routing support 3 from and to the exit 7 of the routing support 3.

[0049] This forms an assembly comprising a routing support 3 and a cable 14 arranged on the routing track, said cable 14 being able to be adapted in length at the time of its installation on the routing support 3, without modifying the difficulty of this step in the manufacture of the magnetic bearing module 1.

[0050] Such a magnetic bearing module 1 with a routing track has the advantage of easily allowing for a wide variety of routing support design variants, unlike modules with a printed circuit board whose design is fixed, and for example, the lengths of electrical connections to the external system at output 7 cannot be modified.

[0051] Thus, the routing plate 3 allows a cable 14 or cable bundle 14 to be of the desired final length and already equipped with its connectors according to the desired version, and therefore to have references of various lengths and connectors when the systems known in the prior art do not allow modularity in the lengths of cabling.

[0052] This routing support 3 equipped with a cable track is modular since it can be mounted on any support having the same interfaces, namely the same center distance between the pins, and the same positions of the coils 11 and the insulation displacement contacts 12.

[0053] This routing support 3 can also be reproduced by homothety at different sizes to adapt to the need while maintaining the ratio of the insulation displacement contacts 12, and by readjusting the routing, since the coils 11 are substantially common to all sizes.

[0054] As illustrated by Figures 1 and 3, the coils 11 can form wound assemblies in pairs positioned on the position sensor 10 at specific locations of a pack of magnetic laminations constituting the discrete electromagnetic circuits of said position sensor 10.

[0055] These wound assemblies are positioned around a substantially concentric circular assembly, in axial positions which may be different from each other, but at precise radial distances from the center of the circular assembly, and also at precise angular positions, since these positionings allow the insulation displacement contacts 12 to be placed at strategic locations to receive the cable 14 with which the electrical connection must be made up to the coils 11.

[0056] The position sensor 10 can thus comprise a plurality of insulation displacement contacts 12 and cables 14 linked to one or more routing tracks 2 of said position sensor 10.

[0057] The cable 14 may also include at least in part the winding wire which is wound on each coil to form the coils 11 and then routed to at least one opening 4 to make a connection in an insulation displacement contact 12 by insertion therein, and routed to the connector 7 intended to interface a system to which the magnetic bearing module 1 is connected.

[0058] Thus, the routing track allows each cable 14 to be routed along the path intended for it thanks to the shapes arranged on the routing support 3.

[0059] The routing support 3 is, for example, a plastic part, comprising shapes and extrusions, for example, formed by screen printing to obtain the routing track in facilitating its manufacture.

[0060] Such a routing track which allows each cable 14 to be guided properly and reduces crossing errors.

[0061] The routing support 3 provides support and mechanical protection for the circuit formed by the routing track for the routing of the cable 14 against possible environmental aggressions during the life of the magnetic bearing module 1 or during the various operations of its manufacture.

[0062] This routing support 3 also allows the cable 14 and the reels 11 to be kept in an operational position throughout the life of the module 3, ensuring that the electrical isolation distances are maintained in accordance with the pre-established rules.

[0063] Fig. 3 represents a portion of the magnetic bearing module 1 in perspective view.

[0064] The coils of the coils 11 have a cavity to receive an insulation displacement contact 12, so that the magnetic bearing module 1 can have a plurality of insulation displacement contacts 12, for example two to eight per quarter of module 1.

[0065] For example, each coil 11 or pair of coils 11 has two insulation displacement contacts 12, namely one at each end of the cable 14 to pass through the routing track.

[0066] The position sensor 10 may include cables of different and mixed nature, for example a connection of a cable 14 which includes on one side an enamelled wire on one side of an insulation displacement contact 12, and which includes on the other side a multi-strand cable on the other side of the same insulation displacement contact 12.

[0067] A magnetic bearing module position sensor 1 is thus produced which does not involve any brazing or impregnation for the cohesion of the coils 11 because blocking the beginning and end of the coil 11 prevents it from losing its winding tension by guaranteeing its integrity during the handling and conveying stages.

[0068] Preferably, the routing support 3 of a cable 14 for a position sensor 3 has at least one retaining slot 6.

[0069] The retaining slot 6 is configured to retain by pinching the cable 14 for its insertion into the insulation displacement contact 12 through the opening 4.

[0070] The slots 6 allow the cable 14 to be pinched to ensure its retention during its insertion into the insulation displacement contact 12.

[0071] The routing support 3 includes, for example, two retaining slots 6 placed on either side of the opening 4 on the protrusions delimiting said opening, so as to ensure a symmetrical, and therefore stable, durable and reliable, retention of said cable on either side of the insulation displacement contact 12.

[0072] Figure 4 shows a cross-sectional view of an insulation displacement contact 12 in which is forcibly inserted a retaining piece 15 which allows the cable 14 to be pushed in and held in a base 13 of the insulation displacement contact 12.

[0073] This prior art retention solution consists of forcibly inserting the arch-shaped retaining piece 15, generally metallic, into the insulation displacement contact 12, and holding it in position by means of anti-return slots 16.

[0074] The invention makes it possible to replace this type of support for the magnetic bearing module 1 of the invention, by directly using the routing support 3 with its cover.

[0075] Figure 6 shows a perspective view of a pusher tool 18 used in class sically for the insertion of the cable 14 into an insulation displacement contact 12.

[0076] The method of manufacturing a magnetic bearing module 1 from such a tool includes a step in which the cable 14 is inserted into the insulation displacement contact 12 using the pusher tool 18 which has a support head 19 which is passed through the opening 4 by pushing said cable 14.

[0077] When the support head 19 reaches a mechanical stop on the routing support 3, the insertion stops and the cable 14 is in position.

[0078] This method is efficient and can be performed at a rapid rate, but requires precise and expensive tooling, with a plurality of support heads 19, or with repetition of the insertion operation individually for each opening 4 through which to pass the cable 14 to an insulation displacement contact 12.

[0079] Figure 5 shows a cross-sectional view of the use of the cover of the support routing 3 itself for the insertion of the cable 14 into an insulation displacement contact 12.

[0080] Thus, the manufacturing process of a magnetic bearing module 1 may provide, as an alternative to the pusher tool 18, that the cable 14 is inserted into the insulation displacement contact 12 using the cover of the routing support 3 itself, which is passed through the opening 4 by pushing said cable 14.

[0081] This method makes it possible to do without the pusher tool 18, and also to ensure directly the realization of the cable connections 14, since the cable 14 is positioned directly opposite each opening 4 and each insulation displacement contact 12 to be connected and is brought into contact with it through the respective opening 4 when the cable 14 is pushed by the routing support 3.

[0082] Assembly and connection operations are reduced to simple mechanical insertions using the cover of the routing support 3 serving as a simple press, instead of complex brazing requiring specific skills and process controls.

[0083] The positioning of the insulation displacement contacts 12 with the cables 14 in The routing support 3 allows for wider positioning tolerances than a rigid part with through pins that would have to be soldered or press-fitted.

[0084] Furthermore, since the assembly is flexible due to the plasticity of the routing support 3, vibrations during the insertion of the routing support 3 do not have an impact on the mechanical strength of the contacts or connections.

[0085] The routing support 3 does not require an overmolding resin to ensure its mechanical integrity or insulation distances because the cables 14 themselves are already insulated, unlike the weld points and pressed contacts of the prior art.

[0086] The magnetic bearing module 1 may further include a position sensor 10 which includes translational guide pads 8.

[0087] The translational guide pads 8 each have a shape of revolution with an axis parallel to an axis of revolution of said position sensor 10.

[0088] Thus, the position of the coils 11 is guaranteed by the distance between a support face of the position sensor 10 on the pads 8 which therefore also serve as a base for the routing support 3.

[0089] Advantageously, the routing support 3 includes passages 5 to allow the translational guide pads 8 to pass through.

[0090] Thus, during the manufacturing process of a magnetic bearing module position sensor 1, the routing support 3 can be assembled on the position sensor 10 by guiding it with the translational guide pads 8 by sliding in the passages 5.

[0091] A good position of the routing support 3 is obtained during all phases of the insertion process of the routing support 3 which is guided with the pads 8 serving as a base and fixing for the routing support 3.

[0092] Fig. 7 represents another cross-sectional view of the use of the cover 20 of the routing support 3 for retaining the cable 14 in an insulation displacement contact 12.

[0093] During the manufacturing process of the magnetic bearing module position sensor 1, the cover 20 is further added to the routing support 3.

[0094] The said cover 20 is then passed through the translational guide pads 8, and the said cover 20 is then held tightly against the routing support 3 and the said routing support 3 against the said position sensor 10 by means of anti-loosening fastenings.

[0095] The cover 20 is for example held in position using screws and nuts, rivets, or, for a faster solution, claw washers.

[0096] The cover ensures that the entire module is held securely in place, while also providing mechanical support for the routing of cables 14.

[0097] Thus, thanks to the routing support 3 for magnetic bearing module, a position sensor is produced whose manufacturing process avoids long and complex steps which are no longer necessary, allowing a reduction in its production costs and a favorable impact on ecology and health by reducing harmful chemical agents that are difficult to recycle, whose resistance to high temperatures and chemical agents is greatly improved compared to existing solutions by the use of cables 14 and plastic parts which are not sensitive to them.

Claims

Demands

1. Routing support (3) for a cable (14), for a magnetic bearing module position sensor (10), said magnetic bearing module position sensor (10) comprising an arrangement of coils (11) wound in reels and an insulation displacement contact (12), said routing support (3) being characterized in that it comprises a routing track for said cable (14) and openings (4) configured to permit the insertion of said cable (14) into the insulation displacement contact (12) through some of the openings (4) when the routing support (3) is positioned opposite said magnetic bearing module position sensor (10), said routing track being formed on the routing support (3) by at least a plurality of protrusions and / or screen prints (2) configured to delimit bearing surfaces for said cable (14) for its routing along the routing support (3).

2. Routing support (3) according to claim 1, comprising at least one retaining slot (6) configured to pinch the cable (14) for insertion into the insulation displacement contact (12) through the opening (4).

3. Routing support (3) according to claim 2, comprising two retaining slots (6) placed on either side of the opening (4).

4. Routing support (3) according to any one of claims 1 to 3, further comprising passages (5) for translational guide pads (8) subjected to the position sensor for magnetic bearing module (10).

5. Routing support (3) according to any one of claims 1 to 4, wherein the protrusions (2) are formed projecting on one side of the routing plate (3) for the routing of the cable (14) along the routing support (3) from and to a connector (7) of the routing support (3).

6. Routing support (3) according to any one of claims 1 to 5, wherein the protrusions and / or screen prints (2) are arranged so as to intermittently hold laterally and on both sides the cable (14) disposed on this routing track.

7. Assembly comprising a routing support (3) according to any one of claims 1 to 6 and a cable (14) disposed on a routing track.

8. Magnetic bearing module (1) comprising a magnetic bearing, a position sensor (10) coupled to said magnetic bearing, and an assembly according to claim 7 assembled on said position sensor (10).

9. Magnetic bearing module (1) according to claim 8 dependent on claim 4, in which the position sensor (10) has translational guide pads (8) having a shape of revolution with axis parallel to an axis of revolution of said position sensor (10) and passing through the passages (5).

10. A method of manufacturing a magnetic bearing module (1) according to any one of claims 8 and 9, wherein the cable (14) is inserted into the insulation displacement contact (12) using a pusher tool (18) having a support head (19) which is passed through the opening (4) by pushing said cable (14), or using a cover (20) of the routing support (3) itself which is passed through the opening (4) by pushing said cable (14), then the cover (20) is added to the routing support (3) by passing said cover (20) through the translational guide pads (8), then said cover (20) is held tightly against the routing support (3) and said routing support (3) against said position sensor (10) by anti-loosening fastening means.

11. A manufacturing method according to claim 10 for manufacturing a magnetic bearing module (1) according to claim 9, wherein the routing support (3) is assembled onto the position sensor for the magnetic bearing module (10) by guiding it with the translational guide pads (8) which are inserted into the passages (5), and the cover (20) is added onto the routing support (3) by passing said cover (20) through the translational guide pads (8).

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