EP3526861A1 - Procede de fabrication d'un porte-balais de machine electrique tournante et porte-balais - Google Patents
Procede de fabrication d'un porte-balais de machine electrique tournante et porte-balaisInfo
- Publication number
- EP3526861A1 EP3526861A1 EP17787515.0A EP17787515A EP3526861A1 EP 3526861 A1 EP3526861 A1 EP 3526861A1 EP 17787515 A EP17787515 A EP 17787515A EP 3526861 A1 EP3526861 A1 EP 3526861A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat sink
- brush holder
- electrical circuits
- connecting portion
- electrical
- 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- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
- H01R43/24—Assembling by moulding on contact members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/38—Brush holders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
Definitions
- the present invention relates to a method of manufacturing a brush holder of a rotating electric machine and a corresponding brush holder.
- the invention finds a particularly advantageous, but not exclusive, application in the field of alternators for motor vehicles capable of transforming mechanical energy into electrical energy and can be reversible.
- Modern motor vehicle alternators are compact equipment in which control and regulation devices are integrated.
- the brush holder generally supports the regulator of the voltage of the current produced by the alternator, constituting a brush-holder regulator assembly connected to the electrical wiring harness of the vehicle by means of terminals or connectors.
- a brush regulator of this type is for example described in the document FR296941 1.
- This brush-holder regulator comprises axial connection terminals and a connector intended to be connected to an electronic control unit of the heat engine.
- the connection terminals and the connector are connected by electrical circuits to an electronic chip of the regulator and to electric braids of brushes.
- the electronic chip is cooled by means of a heat sink.
- heat sinks 1 are obtained by cutting a sheet metal coil, as shown in FIG. 1a.
- the dissipaters 1 are then separated, as shown in FIG. 1b.
- the fins 2 of each sink 1 are folded, as shown in Figure 1c.
- the dissipator 1 thus obtained is the first part to be positioned in an injection mold.
- a trace 3 comprising several electrical circuits 5 is formed from a blank obtained by stamping a thin metal strip.
- the electrical circuits 5 are not completely separated, residual portions 6 of the metal sheet keep them in place for a first pre-molding step illustrated in FIG. 2b.
- This first pre-molding step is intended to mechanically maintain the electrical circuits 5 by plastic 7, before separating them electrically in a second step illustrated in Figure 2c. It is observed that the residual portions 6 have been removed via open areas 8 allowing the passage of a tool provided for this purpose.
- the assembly is then placed in a mold and then a final overmolding step is performed on the assembly formed by the separate circuits and the plastic connecting portion 7.
- the pre-molding step is replaced by a complete separation step of the electrical circuits 5.
- the electrical circuits 5 are then positioned one by one in the mold before the final overmolding step.
- the known manufacturing processes require either a pre-molding step, which in fact doubles with the overmoulding step, or a precise positioning operation of the separate traces in the mold, a positioning operation that is difficult to automate. .
- the invention aims to remedy these drawbacks effectively by proposing a method of manufacturing a brush holder, characterized in that it comprises:
- the invention thus makes it possible to eliminate the pre-molding step and therefore to make substantial savings on tooling (mold of premoulding and tool of cutting of the dissipator), as well as on the raw materials by limiting the losses thanks to the reuse of a part of the trace to realize the heatsink.
- the electrical circuits and the heat sink are thus formed from the same sheet.
- the method of manufacturing a brush holder further comprises a step of folding fins positioned around the connecting portion before the separation step.
- the step of separating the connecting portion from the electrical circuits is performed after positioning the trace in a mold.
- the step of separating the connecting portion from the electrical circuits is performed by punching.
- the fins intended to be folded come from the connecting portion.
- the fins have a bent shape.
- the subject of the invention is a brush holder for a rotating electrical machine comprising in particular:
- a housing made of a plastic material
- a heat sink provided with at least one fin for the heat dissipation of the regulation electronic chip
- the fin has dimensions corresponding to a gap between two adjacent electronic circuits or between two portions of the same electronic circuit.
- a distance between two opposite first sides of the heat sink is substantially equal to a gap between two free ends of two electrical circuits facing one another.
- a distance between two opposite second sides of the heat sink is substantially equal to a gap between two free ends of two electrical circuits facing one another.
- the heat sink comprises at least one projecting portion from a central portion of the heat sink.
- the projecting portion extends in substantially the same direction as that of the central portion of the dissipator.
- the fin is made of material with the central portion of the heat sink.
- the fin extends in a direction substantially perpendicular to that of the central portion of the heat sink.
- the invention relates to a rotating electrical machine comprising a brush holder as previously defined.
- the rotating electrical machine takes the form of an alternator or an alternator-starter.
- FIGS. 1a to 1c are views illustrating the different steps of producing a heat sink implemented in a method of the state of the art
- FIG. 2a to 2c already described, are views illustrating the various steps of producing a brush holder according to the state of the art
- Figures 3a to 3e are views illustrating the steps of producing a brush holder according to the present invention
- Figures 3a, 3b and 3d further comprising a sectional view in a plane perpendicular to the plane P1
- FIG. 4 is a perspective view of a brush holder according to the present invention in which the internal electrical circuits are represented by transparency;
- FIG. 5 is a perspective view of an embodiment of a heat sink according to the present invention
- Figures 6a and 6b are perspective views from above and below of the heat sink of Figure 5 integrated in a brush holder according to the invention.
- a trace 1 1 having a plurality of electrical circuits 12.
- the trace 1 1 extends globally in a plane P1.
- the referenced portion 13 extending substantially perpendicularly to the plane P1 corresponds to eyelets for the connection of the braid braids.
- the electrical circuits 12 comprise conductive portions intended to provide electrical connections with, in particular, brush braids, positive B + and negative B-supply polarities of a vehicle battery, and phases of the alternator.
- the electrical circuits 12 are mechanically interconnected by a connecting portion 14 for forming a heat sink.
- the connecting portion 14 provides a mechanical rigidity of the electrical circuits 12 which are thus in the form of a single piece.
- the fins 17 positioned around the connecting portion 14 and issuing from the connecting portion 14 are folded. The folding is done so that the fins 17 extend in a plane P2. which extends substantially perpendicular to the plane P1 of extension of the trace 1 1.
- the fins 17 are preferably formed at the same time as the electronic circuits 12 and the connecting portion 14.
- the trace 1 1 provided with its folded fins 17 is positioned in a mold 18.
- the connecting portion 14 is then separated with respect to the electrical circuits 12 to form the heat sink 20.
- This heat sink 20 is constituted by the connecting portion 14 and the folded fins 17 exits of this connecting portion 14.
- Such a step separates the electrical circuits 12 relative to each other. This step may be performed by punching by means of a dedicated tool bearing the reference 21 in Figure 3e.
- a molding step of a plastic casing 22 is then performed on the electrical circuits 12 and the heat sink 20.
- the brush holder 10 obtained comprises, in addition to the electronic circuits 12 and the dissipator 20 overmolded by the plastic material:
- a support plate 25 for mounting the brush holder 10 on a rear bearing of the alternator
- the electrical chip 27 visible in FIG. 6b is then placed in its housing situated below the heat sink 20 on the opposite side of the fins 17. It should be noted that because of the realization of the heat sink 20 from the trace 1 1 having the electrical circuits 12, the fins 17 of the final product have dimensions corresponding to a gap between two adjacent electrical circuits 12 or between two portions of the same electronic circuit.
- a distance L1 between two opposite first sides 31 of the dissipator 20 is substantially equal to a gap between two free ends 30 of two electrical circuits 12 facing each other, the free ends 30 being opposite the Electronic chip 27.
- a distance L2 between two second opposite sides 33 of the dissipator 20 is substantially equal to a gap between two free ends 30 of two electrical circuits 12 facing one another, the free ends 30 facing each other. the electronic chip 27.
- the parameter the size of the dissipator 20 is greater than the size or the number of fins 17.
- a dissipator 20 provided with two fins 17 extending along the first opposite sides 31 on either side of the chip 17 and two projecting portions 32 issuing from second opposed sides 33 of the central portion 34 of the dissipator 20. These two projecting portions 32 extend in the plane of the flat central portion 34. This increases the conductive exchange surface between the chip 17 and the dissipator thermal 20.
- the fins 17 may have a bent shape.
- a fin has a length greater than its height, the height being measured in a direction substantially perpendicular to the central portion 34 of the heat sink 20.
- the overmoulded housing 22 has a on its sides a first window 36 defining a housing for the electrical chip 27 intended to come into thermal contact with the dissipator 20.
- the housing 22 has a second window 37 having a larger dimension than the first window 36 to allow the air to come into contact with the heat sink 20, as shown in Figure 6a.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1659824A FR3057413B1 (fr) | 2016-10-11 | 2016-10-11 | Procede de fabrication d'un porte balais de machine electrique tournante et porte balais |
PCT/FR2017/052773 WO2018069628A1 (fr) | 2016-10-11 | 2017-10-10 | Procede de fabrication d'un porte-balais de machine electrique tournante et porte-balais |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3526861A1 true EP3526861A1 (fr) | 2019-08-21 |
Family
ID=57963262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17787515.0A Withdrawn EP3526861A1 (fr) | 2016-10-11 | 2017-10-10 | Procede de fabrication d'un porte-balais de machine electrique tournante et porte-balais |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3526861A1 (fr) |
CN (1) | CN109792127B (fr) |
FR (1) | FR3057413B1 (fr) |
WO (1) | WO2018069628A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3084794B1 (fr) * | 2018-08-02 | 2020-07-17 | Valeo Equipements Electriques Moteur | Electronique de porte-balais de machine electrique tournante et procede de fabrication |
FR3086814B1 (fr) * | 2018-09-28 | 2020-10-30 | Sonceboz Mechatronics Boncourt Sa | Actionneur electrique |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4421358B4 (de) * | 1994-06-18 | 2009-04-09 | Robert Bosch Gmbh | Gleichrichteranordnung, vorzugsweise für einen Drehstromgenerator für Kraftfahrzeuge |
DE10214277A1 (de) * | 2002-03-28 | 2003-10-16 | Bosch Gmbh Robert | Regler und Gleichrichter für eine elektrische Maschine sowie elektrische Maschine |
FR2886477B1 (fr) * | 2005-05-31 | 2007-07-06 | Valeo Equip Electr Moteur | Piece d'interconnexion de signal pour machine electrique tournante |
JP5570331B2 (ja) * | 2010-07-12 | 2014-08-13 | 株式会社小糸製作所 | 車両用灯具 |
FR2969411B1 (fr) * | 2010-12-20 | 2012-12-28 | Valeo Equip Electr Moteur | Dispositif regulateur de tension pour une machine electrique tournante, palier d'une telle machine equipe d'un tel dispositif et une telle machine comportant un tel palier |
CN103329405B (zh) * | 2011-12-19 | 2016-05-11 | 法雷奥电机设备公司 | 用于旋转电机的电压调节器装置、装备有该装置的电机的支承部和包括该支承部的电机 |
-
2016
- 2016-10-11 FR FR1659824A patent/FR3057413B1/fr active Active
-
2017
- 2017-10-10 CN CN201780061240.4A patent/CN109792127B/zh active Active
- 2017-10-10 WO PCT/FR2017/052773 patent/WO2018069628A1/fr unknown
- 2017-10-10 EP EP17787515.0A patent/EP3526861A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018069628A1 (fr) | 2018-04-19 |
FR3057413B1 (fr) | 2018-10-12 |
CN109792127A (zh) | 2019-05-21 |
FR3057413A1 (fr) | 2018-04-13 |
CN109792127B (zh) | 2020-12-15 |
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