WO2023274753A1 - Ensemble d'interconnecteur comprenant un joint d'étanchéité optimisé - Google Patents
Ensemble d'interconnecteur comprenant un joint d'étanchéité optimisé Download PDFInfo
- Publication number
- WO2023274753A1 WO2023274753A1 PCT/EP2022/066560 EP2022066560W WO2023274753A1 WO 2023274753 A1 WO2023274753 A1 WO 2023274753A1 EP 2022066560 W EP2022066560 W EP 2022066560W WO 2023274753 A1 WO2023274753 A1 WO 2023274753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- interconnector
- opening
- sealing
- phase
- assembly
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 105
- 238000005192 partition Methods 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims description 41
- 229920005989 resin Polymers 0.000 claims description 41
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 description 18
- 239000012528 membrane Substances 0.000 description 13
- 239000007788 liquid Substances 0.000 description 11
- 238000003466 welding Methods 0.000 description 10
- 238000005476 soldering Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 241001531957 Opsariichthys uncirostris Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- 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
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
- H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
-
- 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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
Definitions
- TITLE Interconnector assembly including an optimized seal
- the technical field of the invention is that of rotating electrical machines cooled by a fluid, such as an alternator-starter or a reversible machine or an electric motor for a self-propelled mobile device.
- self-propelled mobile device a vehicle for transporting goods or people, which includes its traction system for moving, such as the heat or electric motor of a car, truck, a bicycle or an object that moves with its traction system such as a drone.
- a self-propelled mobile device may further include autonomous driving.
- the present invention relates to sealing at the interconnector and in particular to an assembly for connecting phase outputs of the stator to a control unit of the machine.
- Rotating electrical machines include a stator, a rotor which in operation generates a large amount of heat.
- the stator comprises a pack of laminations provided with notches equipped with notch insulators for mounting the stator winding.
- the winding comprises a plurality of phase windings inserted in the notches of the lamination package and are obtained for example from a continuous wire covered with enamel or from bar-shaped conductive elements, such as pins in the form of a U or I.
- phase windings are, for example, three-phase windings which are connected in a star or in a triangle, the phase outputs of which are connected by means of an interconnector box to power electronics.
- the ends of each phase, each called “phase output”, are connected to a connection end of a trace of the interconnector box to connect them to power electronics or to each other to form a neutral.
- the rotor may include magnets, the rotor being surrounded by the stator, each magnet heats up under the effect of the temperature of the stator which also affects the performance of the magnets.
- liquid-cooled electrical machines are known to increase the cooling efficiency in order to improve the efficiency and the maximum mechanical power of the machine. by a liquid, such as oil or glycol water having better heat transfer flowing around the stator to cool it.
- a liquid such as oil or glycol water having better heat transfer flowing around the stator to cool it.
- these machines require a complex and expensive hydraulic circuit, this is in particular due to the problems of sealing related to the expansions and vibrations of these machines.
- connection housing for each connection zone by using a flexible membrane closing an opening of the bearing through which passes a phase outlet forming the bottom of the waterproof connection housing.
- the interconnector housing comprises a body overmolding the trace sandwiching the flexible membrane with the bearing.
- the body of the interconnector box comprises an opening of the connection housing through which the connection end protrudes.
- the connection housing therefore houses the connection zone comprising the stripped portion of the phase output and of the connection end and the solder.
- the welding is preferably carried out before forming an outline of the connection housing to simplify the welding process and avoid damaging the outline of this housing.
- connection housing After soldering, the connection housing comprises a reservoir mounted on the body of the interconnector housing, forming the outline by surrounding the connection area which is filled with resin to prevent the coolant from coming into contact with the connection area.
- This resin is therefore inserted in a liquid state into the sealed connection housing and then hardens, thus making it possible to seal the connection zone in the connection housing.
- a connection housing entails the risk of the resin leaking when it is in the liquid state towards the outside of the housing.
- leaks of the resin in the liquid state can occur between the opening of the flexible membrane and the phase outlet passing through this opening due, for example, to vibrations and/or changes in position of the outlet. phase output relative to the membrane during movement of the assembly with the stator having the connection housing filled with resin in the liquid state.
- connection housing will harden and can cause significant damage to the electrical machine. For example, if the resin passing through the membrane opening by licking the phase outlet can fall into the air gap and harden causing the rotor to jam. The resin can also fall and harden in an inlet or outlet of the coolant circuit, which can prevent or reduce the circulation of coolant in the electrical machine.
- the invention offers a solution to the problems mentioned above, by making it possible to have a seal through which a phase outlet passes, making it possible to ensure the seal between this phase outlet and the seal while allowing freedom of movement of the phase outlet relative to the seal.
- One aspect of the invention relates to an assembly of an electrical machine, comprising: an interconnector box comprising:
- an interconnector body comprising at least one connection housing opening passing through the body, intended to be filled with resin
- a trace per phase each comprising a connection end to be connected to a phase output, a seal mounted on the interconnector box comprising: • a partition wall partially closing the connection housing opening, and
- the sealing grommet extending from the partition wall, towards the connection housing opening, the grommet comprising: o a chimney extending towards the connection housing opening, o a phase outlet sealing opening passing through the chimney for the passage of a phase outlet in the connection housing opening, o a bellows extending from the dividing wall to the chimney to make the chimney mobile when inserting a phase outlet into the sealing opening. Thanks to the invention, the bellows allows the chimney to be mobile and thus reduce the risk of leakage through the sealing opening produced by the phase outlet.
- the chimney can be oriented differently thanks to the bellows giving it freedom of movement and therefore reducing the risk that the opening in the chimney becomes deformed during the insertion of the phase outlet or by vibrations during filling.
- the assembly according to one aspect of the invention may have one or more additional characteristics from those mentioned in the following paragraphs, considered individually or according to all technically possible:
- the chimney of at least one grommet extends into the connection housing.
- connection end extends from the interconnector body, from the connection housing opening. This allows the phase output to be aligned with the connection end when soldering, or even to guide and adjust the position of the phase output, allowing for more repeatable soldering conditions. Indeed, this makes it possible to reduce the gap between the phase output and the connection end (see by removing it).
- connection end extends from the interconnector body, from a surface of the body perpendicular to an insertion axis of a phase output in the connection housing.
- the grommet allows flexibility of the phase output to be connected to the connection end.
- the chimney comprises at least one internal lip extending in the chimney all around the sealing opening to deform and seal the sealing opening by being in contact with the outlets of phases.
- the lips make it possible to reduce the risk of leaks in the sealing opening by deforming during the insertion of the phase outlet, also catching up with the dimensional tolerances of the phase outlets.
- the lips and the bellows together make it possible to reduce the risk of leakage during misalignment between the sealing opening and the phase outlet or during vibration during movement of the stator with the interconnector comprising the assembly having its connection housing filled with resin still in the liquid state.
- the section of the opening at the level of the at least one lip is less than the minimum section of the phase outlet intended to enter the sealing opening. This ensures deformation of the lip when inserting the phase outlet and therefore sealing between the lip and the phase outlet.
- the sealing opening comprises an axis for inserting a phase outlet towards the connection end and in that the number of internal lips all around the opening of sealing to come into contact with the phase outlets is greater than or equal to two and in that the internal lips are located one after the other in the direction of insertion all along the sealing opening. This reduces the risk of leakage.
- each chimney comprises at least one lip which extends at the outlet of the sealing opening on the side of the interconnector box. This makes it possible to have a lip at the end of the bellows, reducing the risk of the lip gapping when the bellows is deformed.
- the gasket comprises: a sealing face comprising a deformed surface against the interconnector housing, a bearing face opposite the sealing face, and in that the bellows comprises a concave surface on the side of the sealing face and a convex surface on the side of the support face. [0025] This allows the bellows to be movable towards the interconnector box when inserting the phase output into the sealing opening, unlike a reverse bellows described in the following embodiment.
- the concave surface forms a groove around the chimney with respect to the partition wall. This makes it possible on the one hand to solidify the chimney when the resin has hardened and on the other hand to allow freedom of movement from the chimney towards the interconnector body.
- the seal comprises: a sealing face against the interconnector box, a support face opposite the sealing face, and in that the bellows comprises on the side of the sealing face a convex surface and the side of the support face a concave surface.
- the seal comprises: a sealing face comprising a deformed surface against the interconnector box, a support face opposite the sealing face, and in this that the bellows comprises on the side of the sealing face a convex surface and on the side of the bearing face a concave surface.
- the sealing opening comprises a section of similar shape to the section of the phase outlet intended to receive.
- the section of the sealing opening is rectangular to receive a phase outlet having a rectangular section.
- the assembly comprises a support body fixed to the interconnector box, comprising a flat surface compressing with the interconnector body a deformed portion of the seal surrounding the separation wall and in this that the support body comprises at least one phase outlet passage passing through the flat surface.
- the support body comprises a grommet housing whose passage of phase outlet opens and in that the surface of the convex bellows comprises a part located in the grommet housing. This prevents the support body from pressing on the bellows and therefore avoids reducing the freedom of movement of the chimney.
- the grommet housing includes a section having a surface greater than that of the end of the phase outlet passage leading to the grommet housing.
- the support body comprises a grommet housing having a section more wide than a section between guide walls of the phase outlet passage to allow clearance between a free convex surface of the bellows and the housing surface. This prevents the bellows from being deformed before inserting the phase outlet into the chimney sealing opening.
- the assembly comprises means for fixing the support body or the interconnector body intended to mount the assembly on a landing of an electrical machine.
- the support body is clipped onto the interconnector box.
- the support body is a bearing of an electric machine.
- Another aspect of the invention relates to an electric machine comprising the assembly of the invention described above with or without the various characteristics of the embodiments described above, a stator comprising phase outputs passing through the opening of corresponding sealing and the at least one corresponding connection housing opening, in which each phase output end is fixed to a corresponding connection end, resin filling the connection housing opening in contact with the sealing forming a sealed interconnector.
- the interconnector comprises a reservoir fixed to the interconnector housing forming a connection housing surrounding at least one phase output fixed to a corresponding connection end, the connection housing being filled with resin. This allows to have space to carry out the welding more easily then to carry out the connection housing after the welding to put the resin there.
- the tank is fixed by clipping means to the interconnector housing.
- the means for fixing the interconnector body to the tank comprises an undercut of the walls of the tank or/and a retaining cavity for fixing the tank to the interconnector body by the resin bias.
- the resin comprises on its outer faces traces of demolding of a reservoir comprising a remains. This allows to have space to carry out the soldering more easily then to carry out the connection housing after the soldering.
- stator and the interconnector are mounted blind in the yoke comprising the bearing at its end and in that the interconnector body comprises a fixing means in the form of a finger mounted tightly in a housing of the bearing to fix the interconnector to the bearing.
- Another unclaimed invention relates to an assembly of an electrical machine, comprising: an interconnector box comprising:
- an interconnector body comprising at least one connection housing opening passing through the body, intended to be filled with resin
- a trace per phase each comprising a connection end to be connected to a phase output, a seal mounted on the interconnector box comprising:
- the assembly according to one aspect of the invention may have one or more additional characteristics from those mentioned in the preceding paragraphs of the invention of the assembly of the preceding invention, considered individually or in all technically possible combinations.
- FIG. 1 shows a schematic representation according to a three-dimensional view of an assembly to form an interconnector, according to a first embodiment of the invention, with reservoirs.
- FIG. 2 shows a schematic representation according to another three-dimensional view of the assembly according to a first embodiment of the invention.
- FIG. 3 shows a schematic representation of an electrical machine comprising an interconnector formed by the assembly shown in Figure 1.
- FIG. 4 shows a schematic cross-sectional representation of part of the electrical machine of Figure 3.
- FIG. 5 shows a partial schematic representation of an interconnector box of the assembly shown in Figure 1.
- FIG. 6 shows a schematic representation of the electric machine of FIG. 3 without the assembly of FIG. 1.
- FIG. 7a shows a schematic representation in perspective view of the interconnector housing, of a seal shown in Figure 1.
- FIG. 7b shows a schematic cross-sectional representation of the seal shown in Figure 7a.
- FIG. 7c shows a schematic representation of a section of a grommet of the seal shown in Figure 7a.
- FIG. 8 shows a schematic representation according to a three-dimensional view of an assembly according to a second embodiment of the invention.
- FIG. 9 shows a schematic representation according to another three-dimensional view of the assembly of FIG. 8.
- FIG. 10a shows a schematic representation according to a three-dimensional view of a support body of the assembly of figure 8.
- FIG. 10b shows a schematic representation according to another three-dimensional view of the support body of figure 10a.
- FIG. 11 shows a schematic representation of a section of an electrical machine comprising an interconnector formed by the assembly of figure 8.
- FIG. 12 shows a schematic representation according to a three-dimensional view and a section of a seal of the assembly of figure 8.
- FIG. 13 shows a schematic representation according to a three-dimensional view of a tank body of the interconnector of figure 11 .
- FIG. 14 shows a schematic representation according to a section of part of the assembly of figure 8
- FIG. 15 shows a schematic representation according to a three-dimensional view of an assembly according to a third embodiment.
- FIG. 16 shows a schematic representation according to a three-dimensional view of a sealed interconnector comprising the assembly of figure 15.
- FIG. 17 shows a schematic representation of a section of a portion of the assembly of figure 15.
- FIG. 18 shows a schematic representation according to a top view of part of the assembly of FIG. 15.
- FIG. 19 shows a schematic representation according to a three-dimensional view of part of the assembly of figure 15.
- FIG. 20a shows a schematic representation of a section of a seal of the assembly of Figure 15.
- FIG. 20b shows a schematic representation, according to a three-dimensional view, of the seal of the assembly of figure 15.
- Figure 1 shows a schematic representation of an assembly E and three reservoirs 5 to form an interconnector E1 referenced in Figure 3, intended to be mounted on a bearing 2 of an electric machine M cooled by a liquid, such than that represented for example in FIG. 3.
- the interconnector E1 makes it possible to connect phase outputs 4 (referenced and visible in FIG. 4 representing a section of the machine M) of a winding S4 of the electric machine M to a power electronics.
- the electric machine M comprises a rotor R surrounded by a stator S comprising the winding S4.
- the assembly E is a pre-assembly of a sealed interconnector E1, which is therefore intended to be connected to phase outputs 4 of a winding and to receive resin to seal the connection.
- the assembly E comprises an interconnector box 1 comprising a body 10 comprising at least one through connection housing opening 100 intended to be filled with resin.
- the body 10 comprises six connection housing openings 100 of which only three are visible in FIG.
- the interconnector box 1 comprises at least one track 11, referenced in FIG. 4.
- the interconnector box 1 comprises several tracks 11 to be connected to phases of the winding S4 (referenced in figure 4) and in particular the connection of the connections of the winding S4 to the power electronics.
- Each trace 11 includes at least one connection end 114 to be connected to a phase output 4 which can be a wire or a pin, of round or rectangular section.
- the interconnector box 1 comprises at least one trace 11 per phase comprising a connection end 114 to be connected to a phase output 4 and a connection output 115 intended to be connected to power electronics connectors.
- the interconnecting body 10 is molded over the traces 11 for two three-phase systems. There is therefore a connection trace per phase (here in this case 6 phases) to each connect a phase 4 output to a connection of power electronics intended to be connected to the six connection outputs 115.
- the interconnector box 1 comprises other traces 11 to make connections between phase outputs 4.
- the mounting of each three-phase system is in a star.
- two traces 11 for each neutral of a three-phase system connected together by a phase output 4 which is welded with and between two connection ends 114 of the two traces 11.
- a phase output 4 which is welded with and between two connection ends 114 of the two traces 11.
- the interconnector box 1 thus comprises three traces 11 to connect a phase output 4 to one of the three connection outputs 115 per three-phase system and two traces for the neutral connection.
- the three connection ends 114 of these three traces 11 each come out of a corresponding connection housing opening 100 and are located radially closer to the center intended to be crossed by an axis than the four connection ends 114 of neutral connection .
- the interconnector box could include fewer or more traces, for example it could include six traces per three-phase system, the phases of which are connected in a triangle.
- each connector end 114 exits body 10 into connector housing opening 100 and extends to be in connector housing 500 (explained below) through its connector opening.
- connection housing 100 of which three connection housings 500 are shown in Figure 1 (shown on the other three connection housing openings 100 not visible in Figure 1).
- each connection end 114 does not come out of the body 10 through the connection housing opening 100 but comprises at least one part intended to be in a connection housing 500 leading to an opening of connection slot 100.
- connection housing 500 is formed in this embodiment by a reservoir 5 intended to be mounted on the interconnector body 10 after welding between the phase output 4 and the connection end 114 to simplify the welding.
- the reservoir 5 could directly form part of the body 10 (be one-piece).
- Each reservoir 5 therefore comprises a volume forming the connection housing 500 extending the connection housing opening 100 to surround a weld between a phase output 4 of a winding of the electric machine M and a connection end 114
- This volume forming the connection housing 500 is, after soldering between the phase outputs 4 and the connection ends 114, filled with resin in a liquid state, which solidifies to a solid state.
- the sealed interconnector E1 shown in FIG. 3 is called, when the assembly E has its connection ends 114 soldered to the phase outputs 4, and the resin is in the solid state in the connection housing 500.
- the resin is not shown in the figures to simplify the representation.
- the sealed interconnector E1 comprises two tank bodies 50 visible in Figure 3, comprising several tanks 5, but each tank 5 could be independent.
- each tank 5 comprises means for fixing to the interconnector body 10.
- the tank body 50 is glued to the interconnector box 1.
- the body of Interconnector 10 comprises in this example indexing means 175 of the reservoir body 50.
- the reservoir body 50 comprises notches corresponding to the indexing means 175, here each in the form of a stud housed in a notch.
- connection housing 500 The resin, not shown, filling the connection housing 500 remains fixed by passing to the solid state in the connection housing 500 and by surrounding the connection end 114, the solder and the phase outlet 4.
- Each tank 5 can further have its wall forming an undercut in the connection housing 500 to improve the attachment of the reservoir body 50 to the interconnection box 1 through the solid-state resin in this connection housing 500.
- the assembly E also further comprises at least one seal 3 mounted against a flat surface 102 of the interconnector body 10 of the interconnector box 1 shown alone in FIG. 5.
- the seal seal 3 is intended to be compressed between the interconnector box 1 and the bearing of the electrical machine M forming a support body 2 of the assembly E.
- the assembly E comprises a seal 3 by three-phase system, i.e. here two seals 3.
- the assembly E may comprise only one seal 3 for the two three-phase systems or one seal 3 per connection housing opening 100.
- the seal 3 is shown in Figures 7a, 7b, 7c.
- the seal comprises a separation wall 30 partially closing the connection housing opening 100 as can be seen in Figure 2.
- the seal 3 further comprises at least one flexible sealing grommet 34 of a phase outlet 4.
- the seal 3 comprises as many grommet 34 as 4 phase outputs of the multi-phase system to be connected, i.e. here six phase outputs.
- Each sealing grommet 34 extends from the partition wall 30, into the connection housing opening 100.
- Each grommet 34 includes a chimney 341 extending into the connection housing opening 100, towards the connection ends 114.
- Each grommet 34 comprises a phase outlet sealing opening 300 passing through the chimney 341 for the passage of a phase outlet 4 in the connection housing opening 100.
- Each grommet 34 further comprises a bellows 340 extending from the partition wall 30 to the chimney 341 to make the chimney 341 movable during the insertion of a phase outlet 4 in the opening of waterproofness 300.
- each sealing opening 300 is also intended to be mounted opposite a phase outlet passage 200 of the support body 2 (here the bearing) visible on the FIG. 6.
- the bearing body 2 comprises a phase output passage 200 for two phase outputs 4 of one phase of the winding S4.
- the seal 3 therefore comprises a sealing opening 300 per phase outlet opposite the corresponding phase outlet passage 200 and opposite a connection housing opening 100 from interconnector box 1 .
- connection housing opening 100 (visible in particular in FIG. 5) for two sealing openings 300 and a connection housing 100 per output passage of stage 200.
- Two sealing openings 300 are therefore aligned with the phase output passage 200 and the connection housing opening 100, to allow two phase outputs 4 (of one phase) to pass through them and be soldered each to the corresponding connection end 114.
- the seal 3 therefore comprises a sealing face 31 facing the interconnector housing 1 comprising at least one deformed surface 316 against the interconnector housing 1 explained below.
- the seal 3 therefore comprises a bearing face 32 opposite the sealing face 31.
- the bellows 340 allows the chimney 341 to be flexible in order to adapt to vibrations, assembly play, deformation during assembly, welding between the phase output 4 and the connection end 114 and thus allow better sealing during pouring the resin into the connection housing 500.
- the bellows 340 surrounds the chimney 341 and comprises on the side of the sealing face 31, a concave surface 3400 and on the side of the bearing face 32 a convex surface 3401.
- the concave surface 3400 forms a groove around the chimney 34 with respect to the dividing wall 30.
- the chimney 341 comprises at least one lip 346 extending towards the center of the sealing opening 300 to come into contact with the outlet of the corresponding 4 phases.
- the chimney 341 includes three lips 346 but could have fewer or more.
- the chimney comprises at least one lip 346 which extends at the exit from the sealing opening 300 on the side of the interconnector box 10 to prevent resin from entering the sealing opening 300.
- two other lips 346 are therefore a redundant sealing security.
- the chimney 341 comprises the maximum of lips 346 located one after the other in the direction of insertion all along the sealing opening 300.
- the maximum number is three but in realizing a longer chimney in the direction of the sealing opening, it is possible to have other lips 346.
- each section of the sealing opening 300 at the level of a lip 346 comprises a surface lower than the section of the phase outlet 4 intended to pass through the sealing opening 300.
- the separation wall 30 of the seal 3 comprises a deformed portion 361 shown in dotted in a simplified manner in FIG. 7b and shown compressed in FIG. 4.
- This deformed portion 361 is more compressed than an intermediate portion 321 of the separating wall 30 of the seal 3.
- the deformed portion 361 comprises at least one deformed surface 316 shown schematically also in dotted lines in FIG. 7a on the side of the sealed face 31 facing the interconnector body 10 with respect to a first surface 312 of the intermediate portion 321, by the interconnector body 10.
- This deformed surface 316 entirely surrounds the at least one phase 4 outlet sealing opening 300, in this case in this embodiment two sealing openings 300.
- the flat surface 102 of the interconnector body 10 is opposite the first surface 312 of the seal 3.
- the interconnector body 10 comprises a bearing projection 163, visible in Figure 5, extending from this flat surface 102 all around the connection housing 100.
- the support projection 163 compresses the deformed portion 361 in support opposite against a flat surface 20 of the support body 2, forming the deformed surface 361 by deforming it with respect to the first surface 312 of the gasket 3.
- This deformation forms a sealing zone to prevent the resin in the liquid state from flowing between the gasket 3 and the interconnection box 1.
- Each sealing zone therefore here surrounds a connection housing opening 100 open to two sealing openings 300, i.e. in this example one support projection 163 per phase to surround its two phase 4.
- the seal 3 therefore comprises on the face sealing 31 of the partition wall 30, a filling surface 310 between the grommets 34 and the deformed surface 361 which will be covered with resin when it is introduced into the connection housing opening 100.
- connection housing opening 100 comprises a section larger than the section of the phase outlet passage 200.
- the separation wall 30 of the seal 3 therefore comprises when it is compressed, a membrane portion 302, visible in FIG. 7b, delimited between the grommet 34 and the phase output passage 200.
- This membrane portion 302 separates the connection housing opening 100 from the phase output passage 200.
- a membrane portion 302 is also referenced in FIG. 7a by dotted lines on the sealing face 31, corresponding to the delimitation of the phase outlet passage 200 on the side of the bearing face 32.
- the seal 3 comprises, in this example of this embodiment, an indexer 372, one of the two seals 3 of which comprises a hole visible in FIG. 2.
- the flat surface 20 of the support body 2 comprises a shape corresponding to that of the seal 3 including an indexer 273 corresponding to that of the indexer 372 to allow the assembly E to be correctly positioned against the support body 2.
- the assembly E comprises fixing means 192 to the support body 2 comprising corresponding fixing means 291.
- the fixing means 291 of the support body 2 are tapped holes and the fixing means 192 of the assembly E are screws passing through a hole in the interconnector body 10.
- the interconnector body 10 crushes the seal 3 by pressing a bearing surface 320 on the side of the bearing face 32 against the flat surface 20 of the bearing body 2 and in particular the projections 163 each crush a deformed surface 316 of the deformed portion 316 which is more deformed and compressed than the intermediate portion 321 .
- the method of mounting the sealed interconnector E1 comprises a step of fixing the assembly E to the support body 2, here in this example a bearing of the electrical machine M, then a step of insertion of the stator S comprising the winding S4 by inserting the phase outputs 4 of the winding S4 into the corresponding phase output passage 200, each then crossing the corresponding sealing opening 300 and each exiting from G connection housing opening 100.
- the mounting method then comprises a step of soldering each phase output 4 with its corresponding connection end 114.
- the assembly method then comprises a step of gluing each reservoir body 50 to the interconnector body 10.
- the interconnector assembly method then comprises a step of filling the connection housing 500 with resin, flowing in the connection opening 100 as far as the filling surface 310 of the seal 3.
- the method for mounting the interconnector E1 includes a step of waiting for the resin to solidify in the connection housing 500 to protect the solder, the phase outlet 4 and the connection end 114 of the coolant of the machine thus forming the sealed interconnector E1.
- FIG. 8 represents an assembly E′ according to a second embodiment for forming an interconnector E1′ represented in FIG. 11 representing a section of a machine M′ comprising this interconnector E1′.
- the assembly E' and the interconnector E1' are different from those of the first embodiment with respect to the characteristics described in the paragraphs below.
- New specifications include a new part number and modified specifications include a quotation mark "'" to the reference number of the modified characteristic.
- Other identical or similar characteristics include the same reference numbers.
- the assembly E′ comprises the support body 2′ visible in FIG. 9.
- the support body 2′ is shown in FIGS. 10a and 10b according to its two different faces.
- the seal 3 ' comprises in this example of this embodiment fixing passage holes 390' crossing from the sealing face 31 'to the bearing face 32 ', for means of fixing the interconnector body 10' to the support body 2'.
- Each of the fixing passage holes 390' is located between different sealing zones and passes through the intermediate portion 321' from the first surface 312' to the bearing surface 320'.
- the means for fixing the interconnector body 10' to the support body 2' are clipping means 192' visible in FIG. 9.
- the interconnector body 10' comprises male clipping means 192' which are complementary with female clipping means 291' of the support body 2' visible in FIG. 10b.
- the clipping means 192' of the interconnector box 1' are studs comprising an elastically deformable end, each passing through one of the fixing holes 390' of the seal 3' visible on the FIG. 12 and each passing through a hole 290' of the support body 2' in such a way that the elastically deformable end has an outer diameter greater than the hole 290' to retain the stud.
- the support body 2' comprises a groove on a free face, opposite the flat surface 20', around each hole 290' together forming the clipping means 291' to retain and prevent the elastically deformable end of the pad can be deformed again to come out of the hole 290'.
- the support body 2' comprises a phase outlet passage 200' per phase outlet 4, ie one phase outlet passage 200' per sealing opening 300.
- the gasket 3' is therefore mounted between the flat surface 102 of the interconnector body 10' and the flat surface 20' of the support body 2' while crushing with the projections 163 the deformed surface 316 of the deformed portion 361 .
- the assembly E' is also intended to be mounted between the stator S' and the bearing P of the electric machine M' shown in FIG. It can be seen in this figure 11 that the bearing P supporting a rotation shaft of a rotor R' of the electric machine M' extends from the yoke C' and in that the sealed interconnector E1' is mounted ( largely) axially between the bearing P and the active part of the electric machine M' comprising the rotor R' and the stator S'. In this example, only the connection outputs 115' of the traces 11 are located outside by crossing an opening of the bearing P. For example, a seal can be mounted between the interconnector body 10' and the bearing P in the opening to make the seal.
- the interconnector assembly E is slid over the phase outputs until it is supported on the bun, then this assembly is positioned to allow the correct position on the 3 axes before the step of welding and resin filling. Then, the active part (rotor R' and stator S') and the sealed interconnector EG are blindly mounted in the cylinder head by inserting the shaft of the rotor into the bearing P.
- the interconnector body 10' comprises a 19P fixing means to the bearing P.
- the fixing means 19P is a detent fixing rod entering a fixing housing P91 of the bearing 1 'by a tight assembly by deforming the fixing rod 19P in the housing P91.
- this rod can make it possible to index the assembly E 'angularly with respect to the bearing P to bring the connection outlets 115' into the opening of the bearing P; until the interconnector body 10' and a connector seal penetrate the opening of the bearing P.
- each tank 5' comprises clipping means 591 to the interconnector body 10'.
- Clipping means 591 extend from the end of the tank wall 5' surrounding the connection housing 500'.
- the clipping means 591 are flexible tabs comprising a hook for hooking into the opening of the connection housing 100'.
- these fastening means can also be made on the first embodiment and vice versa the bonding of the reservoir body 50′ to the interconnector body 10′ of the first embodiment can be made for this second embodiment.
- the interconnector body 10 includes at least one seal groove 165, for a seal 615, visible in Figure 14, showing a section of the assembly E 'in a connection housing opening 100 '.
- Each groove 165 surrounds the connection housing opening 100', to receive the seal 615, in this case O-ring.
- the leaktight interconnector E1′ comprises the seal 615 sandwiched between the corresponding groove 165 of the interconnector box 1′ and the groove 561 of the corresponding tank 5′.
- connection ends 114, traces 11, are similar to that of the first embodiment.
- the grommets 34 are identical to that of the first embodiment.
- Figure 15 shows an assembly E” according to a third embodiment for forming an interconnector E1” shown in Figure 16.
- the assembly E” and the interconnector E1” are different from those of the second embodiment in with respect to the features described in the paragraphs below.
- New features include a new part number and modified features include one or two quotation marks "'" at the part number of the changed feature.
- Other identical or similar features include the same reference numbers as that of the first or second embodiment.
- the watertight interconnector E1 shown in Figure 16, comprises a single 500” connection housing per three-phase system, i.e. here a single 5” reservoir for six phase 4 output connections at one connection end 114 (assembly star like in the first embodiment) of a trace (not shown in the figures of this second embodiment) of the interconnector box 1”.
- the interconnector body 10 comprises a low wall 15 surrounding a portion of the connection housing volume 500” and a base 150 (referenced in FIG. 18) open to each of the connection housing openings 100” represented on the figure 17 in a section of the assembly at the level of the volume portion of the connection housing 100”.
- the 10” interconnector body includes one 100” connection housing opening per phase 4 output.
- each connection housing opening 100 leads to a housing for the grommets 134 (in the first embodiment and second embodiment the grommets are directly in the connection slot opening 100).
- the curb 15 includes a groove to receive the 615” tank gasket to seal between the 5” tank and the 1” interconnect box.
- the 5” tank is tightly mounted (press fit) in the volume portion of the 500” connection housing.
- the walls of the 5” tank include a part inside the connection housing volume portion 500” against the inner surface of wall 15 by crushing the 615” tank seal and another part on wall 15.
- the fixing means for fixing the 5” tank to the 10” interconnector body here comprise an undercut of the walls of the 5” tank to be fixed by the resin to the 10” interconnector body.
- the E” assembly includes three-phase system connectors for connecting each 115” connection output intended to be connected to a power electronics connector.
- the means 19p' for fixing the interconnector box 1” to a bearing or another part, comprise screws passing through a hole in the interconnector body 10”.
- Interconnector E1” is therefore not arranged for blind assembly in this second embodiment.
- the interconnector E1” can be mounted on an electric machine of the type of that of the first embodiment.
- the fixing means 19p' of the interconnector box 1” also have the function of fixing the assembly E” to, for example, a bearing P, a function of exerting pressure on the seal 3 ” by the interconnector box 1 ” against the support body 2” sandwiched between, in this example the bearing, and the interconnector body 10”.
- the two holes of the fixing means 19p' are located in such a way that a straight line D passing through these two holes pass between the sealing openings 100” of the phase outlets 4.
- the line D passes between three sealing openings 100” of three phase outlets 4 of three phases of a three-phase system and the three other seal openings 100” from the other three phase outlets 4 of these three phases.
- the means for clipping 291” of the support body 2” by means of clipping 192” of the interconnector box 1” are different from those of the first embodiment in that the seal 3” is positioned between the clipping means 291”, 192”.
- the clipping means 291” of the support body 2 visible in figure 19 representing the support body 2” and the seal 3”, comprise a pair of clips, here U-shaped comprising a 290” opening extending beyond the 20” flat surface opposite the 3” gasket.
- the clipping means 192” of the 10” interconnector body, visible in figure 15, comprise a hook by clips to be fixed inside the opening 290” of the clips.
- the 3” seal therefore has no fixing passage hole as in the first embodiment.
- the support body 2 comprises in this example, at least one indexing means 271, 271 'of the support body 2” with the seal 3” and the interconnector box 1
- the support body 2" comprises in this example, two indexing means 271, 271' in the shape of a finger, visible in figure 19 each passing through an indexing opening 372' of the seal 3" (referenced in figure 20b ), to fit into a hole in the interconnector box 1 This allows the 3” seal to be correctly positioned on the support body 2” for mounting the interconnector box 1”.
- the support body 2 comprises in this example guide walls 204 surrounding each phase outlet passage 200” facing a single sealing opening 300.
- each guide wall 204 leads into a grommet housing 234. forms a hollow with respect to the flat surface 20” of the support body 2”, visible in figure 17.
- the sealing zone between the interconnector body 10” and the seal 3” is made differently in that the seal 3” comprises at least one projection seal 36 on sealing face 31”, shown for example in Figures 17, 19, 20a, 20b.
- the 10” interconnector body has no protrusion.
- the deformed portion 361' of the gasket 3" therefore includes the sealing projections 36 with respect to the first surface 312", forming the deformed surface 316'.
- the deformed portion 361' of the seal 3" further comprises bearing projections 36' on the bearing face 32" opposite the sealing projections 36 located on the sealing face 31”, forming a second deformed surface 362.
- the sealing projections 36, and optionally the bearing projections 36' surround all of the grommets 34 of the seal 3”.
- the deformed portion 361' therefore surrounds the membrane portion 302' of which, on the one hand, a first clearance is formed between the filling surface 310' of this membrane portion 302' and the housing of the grommets 134 of the interconnector body 10” facing each other and on the other hand a second clearance between this membrane portion 302' and the interconnector body 2'.
- the clearances allow the 3” gasket to take on its necessary shape to help each grommet 34 seal the sealing opening 300 through which a phase outlet 4 passes.
- the E1” interconnector therefore comprises resin covering this filling surface 310”.
- a second clearance can be formed between the first surface 312” of the intermediate portion 321” and the interconnector body 10”, making it possible to ensure that the interconnector body 10” compresses the sealing projections 36, 36' against the flat surface 20” forming a bearing surface.
- a play can also be formed between the support surface 320” of the support face 32” opposite the first surface 312” and the support body 2”, making it possible to ensure that the support body 2” compresses the sealing projections 36, 36' forming the deformed surface 362.
- the sealing zone formed by the sealing projections 36', 36" surrounds all of the grommets 34, of the seal 3". There is therefore in this example only one sealing zone formed by the sealing projections 36 ', 36 "but according to another example there could be several as in the example of the first embodiment by having
- the grommets 34 are identical to those of the first embodiment.
- the interconnector E1, EG, E1 comprises reservoirs 5, 5', 5” making it possible to protect the resin, but the interconnector E1, EG, E1” could be devoid of its 5, 5', 5” tanks. Indeed, either the interconnector body 10, 10', 10" can form its reservoirs 5, 5' (but the welding between the phase output 4 and the connection end 114 is more difficult).
- the 5, 5’, 5” tank can also be a mold comprising a draft which is removed when the resin has hardened (in this case, the resin is no longer protected by the tank).
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280045884.5A CN117581454A (zh) | 2021-06-29 | 2022-06-17 | 包括优化衬垫的互连器组件 |
US18/573,244 US20240291346A1 (en) | 2021-06-29 | 2022-06-17 | Interconnector assembly comprising an optimised gasket |
EP22741155.0A EP4364277A1 (fr) | 2021-06-29 | 2022-06-17 | Ensemble d'interconnecteur comprenant un joint d'étanchéité optimisé |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2106990 | 2021-06-29 | ||
FR2106990A FR3124652B1 (fr) | 2021-06-29 | 2021-06-29 | Ensemble d’interconnecteur comprenant un joint d’étanchéité optimisé |
Publications (1)
Publication Number | Publication Date |
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WO2023274753A1 true WO2023274753A1 (fr) | 2023-01-05 |
Family
ID=77411871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/066560 WO2023274753A1 (fr) | 2021-06-29 | 2022-06-17 | Ensemble d'interconnecteur comprenant un joint d'étanchéité optimisé |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240291346A1 (fr) |
EP (1) | EP4364277A1 (fr) |
CN (1) | CN117581454A (fr) |
FR (1) | FR3124652B1 (fr) |
WO (1) | WO2023274753A1 (fr) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55112463U (fr) * | 1979-02-01 | 1980-08-07 | ||
JPS56145347U (fr) * | 1980-03-31 | 1981-11-02 | ||
JPH0720060U (ja) * | 1993-08-31 | 1995-04-07 | 株式会社京浜精機製作所 | 電磁装置におけるリード線引出し構造 |
DE19646617A1 (de) * | 1996-11-12 | 1998-05-14 | Pierburg Ag | Kühlmittelpumpe mit elektrisch kommutiertem Elektromotor |
JP2002005019A (ja) * | 2000-06-19 | 2002-01-09 | Sanyo Electric Co Ltd | 電装部品の保護装置 |
EP1361644A2 (fr) * | 2002-05-07 | 2003-11-12 | Ebm Werke GmbH & Co.KG | Moteur sans balais |
US7211914B2 (en) * | 2004-07-06 | 2007-05-01 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Electric motor having a high degree of protection against the ingress of foreign particles and moisture |
US8323004B2 (en) * | 2009-01-14 | 2012-12-04 | Mitsuba Corporation | Fuel supply device |
US20200195079A1 (en) * | 2016-10-14 | 2020-06-18 | Robert Bosch Gmbh | Method for electrically contact-connecting a winding of an electrical machine to a printed circuit board |
-
2021
- 2021-06-29 FR FR2106990A patent/FR3124652B1/fr active Active
-
2022
- 2022-06-17 US US18/573,244 patent/US20240291346A1/en active Pending
- 2022-06-17 EP EP22741155.0A patent/EP4364277A1/fr active Pending
- 2022-06-17 WO PCT/EP2022/066560 patent/WO2023274753A1/fr active Application Filing
- 2022-06-17 CN CN202280045884.5A patent/CN117581454A/zh active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55112463U (fr) * | 1979-02-01 | 1980-08-07 | ||
JPS56145347U (fr) * | 1980-03-31 | 1981-11-02 | ||
JPH0720060U (ja) * | 1993-08-31 | 1995-04-07 | 株式会社京浜精機製作所 | 電磁装置におけるリード線引出し構造 |
DE19646617A1 (de) * | 1996-11-12 | 1998-05-14 | Pierburg Ag | Kühlmittelpumpe mit elektrisch kommutiertem Elektromotor |
JP2002005019A (ja) * | 2000-06-19 | 2002-01-09 | Sanyo Electric Co Ltd | 電装部品の保護装置 |
EP1361644A2 (fr) * | 2002-05-07 | 2003-11-12 | Ebm Werke GmbH & Co.KG | Moteur sans balais |
US7211914B2 (en) * | 2004-07-06 | 2007-05-01 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Electric motor having a high degree of protection against the ingress of foreign particles and moisture |
US8323004B2 (en) * | 2009-01-14 | 2012-12-04 | Mitsuba Corporation | Fuel supply device |
US20200195079A1 (en) * | 2016-10-14 | 2020-06-18 | Robert Bosch Gmbh | Method for electrically contact-connecting a winding of an electrical machine to a printed circuit board |
Also Published As
Publication number | Publication date |
---|---|
EP4364277A1 (fr) | 2024-05-08 |
US20240291346A1 (en) | 2024-08-29 |
FR3124652A1 (fr) | 2022-12-30 |
FR3124652B1 (fr) | 2023-10-27 |
CN117581454A (zh) | 2024-02-20 |
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