EP3830932A1 - Rotary electric machine - Google Patents
Rotary electric machineInfo
- Publication number
- EP3830932A1 EP3830932A1 EP19742379.1A EP19742379A EP3830932A1 EP 3830932 A1 EP3830932 A1 EP 3830932A1 EP 19742379 A EP19742379 A EP 19742379A EP 3830932 A1 EP3830932 A1 EP 3830932A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection
- electric machine
- winding
- machine according
- stator
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/38—Windings characterised by the shape, form or construction of the insulation around 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
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- 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
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
Definitions
- the invention relates to a rotary electrical machine, in particular for a motor vehicle, in which the installation of the interconnector is simplified.
- the invention finds applications in the field of rotating electrical machines such as alternators or reversible machines that can operate as electric generators or electric motors.
- rotary electrical machines comprise a stator and a rotor secured to a shaft.
- the rotor can be integral with a driving and / or driven shaft and can belong to a rotating electric machine in the form of an alternator, an electric motor or a reversible machine of the alternator-starter type which can operate in the two modes.
- the stator is mounted in a housing configured to rotate the shaft on bearings by means of bearings.
- the rotor is of the “claw rotor” type and comprises two pole wheels each having claws nested one inside the other to form the poles and a core around which a rotor coil is wound.
- the rotor comprises a body formed by a stack of sheet metal sheets held in the form of a package by means of a suitable fixing system.
- the rotor has poles formed for example by permanent magnets housed in cavities formed in the magnetic mass of the rotor.
- the poles are formed by coils wound around the rotor arms.
- the stator 100 comprises a body 1 10 consisting of a stack of thin sheets forming a crown, the inner face of which is provided with notches 1 1 1 open radially inward to receive phase windings 120. These phase windings 120 pass through the notches 1 11 of the stator body and form a bun 125, 126 on either side of the stator body 1 10.
- the phase windings 120 are windings polyphase, connected in star or delta, whose phase inputs / outputs 123 are connected to an electrical control module.
- the phase windings 120 are obtained from conductive elements in the form of pins 121.
- a pin 121 has two branches connected by a curved head, or collateral portion, and whose intermediate rectilinear portions, or central portions, are placed in two different notches angularly offset from each other by a predetermined angle.
- the heads of the pins 121 are twisted and form the upper bun 125 - namely the bun provided with phase inputs / outputs, located upstream of the winding.
- the free ends of the branches are connected together, for example by welding, and twisted to form the lower bun 126 - namely the bun downstream of the winding.
- the pins 121 are electrically connected to each other. Two pins 121 of the same winding are connected together directly, for example by welding. Two phase windings 120 are connected to each other by means of reversing pins 130, each reversing pin electrically connecting the last pin 121 a of one of the windings with the first pin 121 b of the other winding. Generally, the reversing pins 130 are located above the upper bun, that is to say in the axial extension of the winding, so as to connect two windings having respectively a first and a last pins positioned at a distance from the one of the other.
- Each phase winding 120 has a phase output 124 and a connection point 122.
- the connection point is a neutral point.
- the connection point is a point allowing two separate windings to be connected to form the triangle connection.
- the stator winding therefore has several connection points 122 and several phase outputs 124 distributed along a periphery of the stator 100.
- the connection points 122 of the same phase system must be connected together without creating a short circuit. electric with phase outputs 124 in order to guarantee a good electric supply of the stator winding.
- the stator 100 generally comprises an electrical connection member 140 which electrically connects the connection points 122 to one another avoiding phase outputs 124.
- connection member generally has a complex shape and, consequently, a considerable bulk. .
- the connection member electrically connects the neutral points 122 between them and bypasses the phase outputs 124.
- the manufacture of the stator requires a precise positioning of the connection member above the chignon and a holding of said member in position for the entire duration of the neutral point welding process 122 , which makes the manufacturing process difficult and delicate.
- connection member is partially overmolded in an electrically insulating material.
- the invention relates to a rotary electrical machine, in particular for a motor vehicle, comprising:
- stator comprising a stator body and an electric winding, said electric winding comprising a plurality of phase windings forming a protruding bun on an axial end face of the stator body, each phase winding comprising an end forming a winding connection point, and
- connection member positioned in the extension of the stator and comprising at least one electrically conductive element overmolded in an electrically insulating material and extending radially out of the electrically insulating material to form at least two connection outputs to which the connection points.
- Such a rotary electrical machine has a reduced bulk compared to the machines of the prior art.
- connection points are neutral points of the winding.
- the electric winding is a wavy type winding.
- Said winding can for example be of the distributed wavy or distributed wavy or nested wavy or even simple wavy type.
- Such a corrugated winding is different from a concentric type winding in that the same coil of a phase winding of a corrugated winding is inserted into several notches so as to be wound around several teeth, a coil of a phase winding of a concentric type winding is itself wound around a single tooth.
- the electrical winding comprises a plurality of electrical conductors connected together so as to form the plurality of phase windings.
- each of the electrical conductors has a "U” or "I" shape. This is called a conductive pin winding.
- connection member is positioned at the top of the bun.
- connection member is supported on the bun. These embodiments make it possible to limit the vibrations within the machine when the latter is in rotation.
- the connection member is supported on at least one of the reversing pins.
- the electrically insulating material forms a stability stand at at least one end of the connection member.
- a contact zone formed by a contact between the connection outlet of the connection member and the connection point of the associated winding extends in a plane parallel to the axis of the stator and in particular in a plane comprising said axis .
- connection output of the connection member and the connection point of the associated winding are arranged so as to be in contact with one another in a circumferential direction, and in particular only in said circumferential direction.
- connection outputs each comprise at least one connection zone extending axially along a connection point and on which is connected to said connection point.
- connection outputs each comprise at least one connection zone extending radially along a connection point and to which said connection point is connected.
- connection member comprises several electrically conductive elements overmolded in the same electrically insulating material, the ends of the electrically conductive elements forming a connection outlet.
- connection point is arranged between the two connection outlets in a circumferential direction.
- connection outlets located at the ends of the connection member are each provided with a straw ensuring contact with the connection point.
- each connection point is welded to at least one connection output by laser welding or electrical welding.
- connection members distributed over the circumference of the winding bun.
- the invention relates to a rotary electrical machine, in particular for a motor vehicle, comprising:
- stator comprising a stator body and an electric winding, said electric winding comprising a plurality of phase windings forming a protruding bun on an axial end face of the stator body, each phase winding comprising an end forming a winding connection point, and
- connection member electric A plurality of electrically conductive elements each having at least one end extending radially to form connection outlets to which the connection points are connected, said electrically conductive elements being connected to each other by overmolding to form a connection member electric.
- the machine comprises at least two connection members distributed over the circumference of the winding bun.
- Figures 1 and 2 already described, show a perspective view and a partial view of a stator winding according to the prior art
- Figure 3 already described, shows a perspective view of a stator equipped with a connection member according to the prior art
- FIGS. 4A, 4B and 4C represent, respectively, a partial perspective view, a top view and a partial front view of a rotary electrical machine according to an embodiment of the invention
- FIG. 5 represents a partial front view of a rotary electrical machine according to another embodiment of the invention.
- FIGS. 6A, 6B and 6C represent partial views, in perspective and from the front, of a rotary electric machine according to another embodiment of the invention.
- Figures 7, 8 and 9 show partial perspective views of a rotary electrical machine according to yet another embodiment of the invention.
- FIGS. 4 to 9 show various partial views of a rotary electrical machine according to several embodiments of the invention.
- the rotary electrical machine comprises a stator 100 of axis X comprising a stator body 1 10 crossed by one of the phase windings 120 forming the winding of the stator.
- the phase windings 120 form, at each end of the stator body 110, a bun.
- a connection member 150 is mounted in the extension of at least one of the buns 125, 126.
- the connection member 150 is mounted in the extension of the upper bun 125, being understood that it could, similarly, be mounted in the extension of the lower bun 126.
- connection member 150 is preferably positioned in the axial extension of the bun, it being understood that off-center positions can be envisaged for advantages other than the bulk.
- connection member 150 - also called an interconnector - comprises one or more electrically conductive elements 155, for example made of copper, overmolded in an electrically insulating material forming an insulating envelope 156.
- This interconnector 150 having an electrically insulating and heat resistant material of the winding, it can be positioned bearing on the bun 125 of the stator, which makes it possible to limit the space generated by the presence of the interconnector and to limit the vibrations generated by the rotating electrical machine.
- the interconnector 150 is positioned in abutment on one or more reversing pins 130, which ensures stable positioning of the interconnector in particular during the installation operations of the interconnector 150.
- the installation of the interconnector is facilitated by its positioning on the reversing pins 130 and the welding of neutral points on the interconnector is facilitated by the stability of the assembly. The use of tools to hold the interconnector in place is no longer necessary.
- the interconnector 150 comprises several electrically conductive elements 155 - also called conductive tracks - which extend mainly inside the insulating envelope 156 and which form, outside of said insulating envelope, neutral point connection outputs 122.
- An interconnector 150 with two electrically conductive elements 155 extending inside the insulating envelope 156 is partially represented in FIG. 6C. This figure shows in more detail the ends of each of the conductive tracks 155 extending radially out of said insulating envelope 156 to each form a connection outlet 153, 157.
- Each end 153, 157 of conductive track - also called connection outlet - is connected with a neutral point 122.
- the phase windings 120 of the stator form, at each of their ends, a neutral winding point 122, these neutral points being connected to each other by means of the interconnector 150.
- each end of the conductive track 155 extends radially out of the insulating envelope 156, forming an angle of the order of 90 ° with the insulating envelope 156.
- Each connection outlet 153, 157 thus forms a hook connection able to be connected, for example by laser welding or electrical welding, to a neutral point 122. This radial extension of the connection hooks makes it possible to avoid any risk of damage to the insulating envelope during the point welding operations neutral.
- a neutral point 122 can be connected between the ends of two neighboring conductive tracks.
- the two ends of conductive tracks for example the ends 153 and 157, are the ends of two adjacent conductive tracks 155, coming from the same insulating envelope 156.
- These two ends 153, 157 extend from substantially parallel outside the insulating casing 156 to form a double connection hook suitable for sandwiching a neutral point 122.
- a welding operation for example electric or laser, ensures the electrical connection between the neutral point 122 and each ends 153, 157.
- a single interconnector 150 for example in the form of an arc of a circle, can connect all the neutral points 122 of the winding.
- Several interconnectors for example two, in the form of an arc of a circle each, can be distributed over the circumference of the bun 125, each interconnector connecting only some of the neutral points 122 of the winding. Such a distribution of the interconnectors allows good ventilation within the rotating electrical machine.
- two interconnectors 150a, 150b are positioned with diametrically opposite on the circumference of the bun 125, each connecting three neutral points.
- FIGS. 4 to 9 Different modes of connection of the neutral points 122 on the interconnector 150a or 150b are shown in FIGS. 4 to 9.
- the mode of connection of the neutral points 122 can be identical for each of the interconnectors, as shown in FIGS. 4 to 9, or, on the contrary, the connection method may differ from one interconnector to another.
- the connection modes of the two interconnectors 150a, 150b are similar. The connection mode of a single interconnector will therefore be described.
- Each neutral point 122 of the stator winding can be connected to one or two ends of conductive track (s) 155.
- the central neutral point 122b is connected between two ends of conductive tracks and the two lateral neutral points 122a, 122c are each connected at one end of a conductive track 155.
- the lateral neutral point 122a is connected to one end 153 of conductive track 155.
- the neutral point 122a and the end 153 of conductive track form, when welded to each other, a connection point 163.
- the lateral neutral point 122c and the end 154 of conductive track form, once connected, the connection point 161.
- the central neutral point 122b is in turn connected between the end 151 of a conductive track and the end 152 of another conductive track of the same interconnector 150a.
- the neutral point 122b and the ends 151, 152 of conductive tracks form, when welded to each other, a connection point 162.
- the lateral neutral points 122a, 122c are welded outside the interconnector and close the interconnector 150a.
- the central neutral point 122b is connected, as in FIGS. 4A-4C, between two ends 151, 152 of conductive tracks and the two lateral neutral points 122a, 122c are each connected at only one end , respectively 153 and 154, of the conductive track 155.
- the lateral neutral points 122a, 122c are welded inside the interconnector. It is therefore the ends 153, 154 which close the interconnector 150a.
- each neutral point 122a, 122b and 122c is connected between two ends of conductive tracks, respectively 153 and 157, 151 and 152, 154 and 158.
- a crutch 170 can be installed under the insulating jacket 156 so as to rest on the bun 125.
- a crutch can be provided at each of the ends of the interconnector 150a, each stand having dimensions adapted to prevent any pivoting of the interconnector.
- This stand 170 is a protrusion, made of insulating material, projecting between the conductive track 155 and the bun 125. It can be attached under the insulating casing 156 or else formed by molding in the electrically insulating material.
- a central stand may be formed under the interconnector, for example opposite the portion containing the connection point 162 , to maintain the interconnector in the extension of the bun.
- each hook or double hook for connection extends radially through the bun 125. This is then called a hook / radial double hook.
- each connection point 161, 162, 163 has a connection zone, at the end of the conductive track, which deploys in a direction perpendicular to the direction in which the neutral point 122 leaves the winding. The welding ensuring the electrical conduction between the neutral point and the interconnector is therefore carried out at the point of intersection of the hook, or double-hook, and of the neutral point.
- each hook or double hook connection extends axially in the extension of the winding. This is called an axial hook / double hook.
- each connection point 164, 165, 166 comprises a connection zone, at the end of the conductive track, which deploys in a direction parallel to the direction in which the neutral point 122 leaves the winding.
- the connection area and the neutral point are welded parallel to each other, which increases the area of electrical conduction between the two parts.
- each neutral point 122 can be connected to a single end of the conductive track or between two ends of the conductive tracks. In the example of FIG.
- each neutral point 122a, 122b and 122c is connected axially between two ends of conductive tracks, respectively 153 and 157, 151 and 152, 154 and 158.
- each neutral point - whether central or lateral - is connected within a double hook.
- a stand 170 is installed laterally, on either side of the interconnector, under the insulating jacket 126 in order to ensure the stability of said interconnector 150a.
- the central neutral point 122b is connected between two ends of conductive tracks and the two lateral neutral points 122a, 122c are each connected at only one end of a conductive track 155.
- the point lateral neutral 122a is connected to one end 153 of conductive track 155 forming, after welding, the connection point 166.
- the lateral neutral point 122c is connected to one end 154 of conductive track 155 forming, after welding, the point of connection 164.
- the central neutral point 122b is itself connected between the end 151 of a conductive track and the end 152 of another conductive track of the same interconnector 150a forming, after welding, the connection point 165.
- 122c are welded outside of interconnector 150a so that they close the interconnector.
- the lateral neutral points 122a, 122c are welded inside the interconnector 150a so that it is the ends 153, 154 which close the interconnector.
- connection hook is previously provided with a tin straw in order to ensure a quality weld between the neutral point and the connection hook.
- the three neutral points 122a, 122b, 122c of a stator winding are connected to each other via the interconnector 150.
- This interconnector 150 could also connect the phase outputs 124 of the stator so as to bring circumferentially all the phase inputs and outputs to control electronics.
- the foregoing description focuses on a star-connected coil. Of course, it will not depart from the scope of the invention to replace the star coupling by a triangle coupling, the neutral points then being replaced by connection points allowing the phase windings to be connected together to form the triangular connections. .
- the rotary electric machine according to the invention includes various variants, modifications and improvements which will be obvious to those skilled in the art, it being understood that these variants , modifications and improvements form part of the scope of the invention, as defined by the claims which follow.
- it will not depart from the scope of the invention to replace the plurality of electrical conductors welded together forming the coil by continuous wires with round or rectangular section.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1857082A FR3084538B1 (en) | 2018-07-30 | 2018-07-30 | ROTATING ELECTRIC MACHINE |
PCT/EP2019/069864 WO2020025405A1 (en) | 2018-07-30 | 2019-07-24 | Rotary electric machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3830932A1 true EP3830932A1 (en) | 2021-06-09 |
Family
ID=64049378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19742379.1A Pending EP3830932A1 (en) | 2018-07-30 | 2019-07-24 | Rotary electric machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210167656A1 (en) |
EP (1) | EP3830932A1 (en) |
JP (1) | JP7321250B2 (en) |
FR (1) | FR3084538B1 (en) |
WO (1) | WO2020025405A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3105643B1 (en) * | 2019-12-20 | 2023-04-14 | Valeo Equip Electr Moteur | Stator comprising an interconnector |
FR3119948A1 (en) * | 2021-02-16 | 2022-08-19 | Valeo Equipements Electriques Moteur | Interconnector for a rotating electrical machine |
FR3121801B1 (en) * | 2021-04-07 | 2023-05-05 | Nidec Psa Emotors | Connector for rotating electrical machine stator |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001286082A (en) | 2000-04-03 | 2001-10-12 | Mitsubishi Electric Corp | Stator of ac generator |
JP2005076905A (en) | 2003-08-28 | 2005-03-24 | Sharp Corp | Electric appliance and air conditioner |
IT1397784B1 (en) * | 2010-01-15 | 2013-01-24 | Gate Srl | MANIFOLD FOR THE STATOR OF A BRUSHLESS MOTOR CURRENT CONTINUES WITH PERMANENT MAGNETS |
JP5661161B1 (en) * | 2013-10-07 | 2015-01-28 | 三菱電機株式会社 | Rotating electric machine |
DE112016003648T5 (en) * | 2015-08-10 | 2018-05-09 | Nidec Corporation | engine |
FR3046505B1 (en) * | 2016-01-05 | 2018-02-16 | Valeo Equipements Electriques Moteur | STATOR FOR A ROTATING ELECTRIC MACHINE |
DE102016204935A1 (en) * | 2016-03-24 | 2017-09-28 | Robert Bosch Gmbh | Circuit board for a stator of an electrical machine and method for manufacturing an electrical machine |
-
2018
- 2018-07-30 FR FR1857082A patent/FR3084538B1/en active Active
-
2019
- 2019-07-24 EP EP19742379.1A patent/EP3830932A1/en active Pending
- 2019-07-24 JP JP2021505221A patent/JP7321250B2/en active Active
- 2019-07-24 WO PCT/EP2019/069864 patent/WO2020025405A1/en unknown
- 2019-07-24 US US17/263,394 patent/US20210167656A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210167656A1 (en) | 2021-06-03 |
FR3084538B1 (en) | 2020-12-25 |
WO2020025405A1 (en) | 2020-02-06 |
JP7321250B2 (en) | 2023-08-04 |
FR3084538A1 (en) | 2020-01-31 |
JP2021533712A (en) | 2021-12-02 |
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