WO2022184205A1 - Stator - Google Patents
Stator Download PDFInfo
- Publication number
- WO2022184205A1 WO2022184205A1 PCT/DE2022/100107 DE2022100107W WO2022184205A1 WO 2022184205 A1 WO2022184205 A1 WO 2022184205A1 DE 2022100107 W DE2022100107 W DE 2022100107W WO 2022184205 A1 WO2022184205 A1 WO 2022184205A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- winding
- stator
- group
- wires
- slot
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims abstract description 275
- 230000004323 axial length Effects 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- H02K3/04—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 present invention relates to a stator for an electrical machine, in particular for use in a hybrid or all-electric drive train of a motor vehicle, the stator having a cylindrical opening which extends axially through the stator and on which a plurality of an inner cylindrical surface of the cylindrical opening, there are stator slots extending radially outwards and formed over the entire axial length of the stator, the stator slots each having a slot base at their radially outer end and an air gap at their radially inner end to a rotor that can be accommodated in the cylindrical opening have, wherein stator windings are arranged with winding wires in the stator slots and the stator windings are designed as a wave winding with a first winding mat and a second winding mat.
- Electric motors are increasingly being used to drive motor vehicles in order to create alternatives to internal combustion engines that require fossil fuels.
- Significant efforts have already been made to improve the suitability for everyday use of electric drives and also to be able to offer users the driving comfort they are accustomed to.
- Stators for electrical machines with a wave winding are known from the prior art in principle for use in drive trains of motor vehicles. With such a wave winding, the individual winding wires are not routed in a circular manner between two stator slots, but instead loop successively through all of the stator slots of a stator in accordance with a waveform. This allows automated Production facilities are used, whereby accordingly wound stators can be produced more efficiently and economically.
- the respective winding ends of the winding mats on the stator are generally offset circumferentially by 180°.
- This large circumferential distance between the winding ends leads to an increased outlay on interconnection and to more complex and expensive production, since the interconnection usually has to be implemented by means of one or more additional interconnection rings. Although this reduces the complexity in the manufacturing process by means of a predefined positioning in it for each winding end, the additional manufacturing effort and the associated costs for this additive component are disadvantageous.
- the winding ends can also be interconnected directly, but this is bought at the cost of a significant increase in complexity and costs in the production of such stators.
- DE102008007409A1 describes a three-part switching ring for a stator, with three busbars and a star point ring being arranged in one plane, lying flat next to one another in a carrier ring made of a temperature-resistant plastic.
- the contact points of the busbars and the star point ring protrude from the carrier ring and are connected to the wire ends of the partial windings of the stator.
- the object of the present invention is now to provide a stator that at least mitigates or completely eliminates the described disadvantages of the prior art and in which a connection of a stator winding with at least two winding mats can be implemented in a simple and cost-optimized manner without the use of connection rings.
- stator for an electric machine in particular for use in a hybrid or all-electric drive train of a motor vehicle, the stator having a cylindrical, has an opening that extends axially through the stator and on which there are a large number of stator slots that are distributed circumferentially and extend radially outwards from an inner cylindrical surface of the cylindrical opening and are formed over the entire axial length of the stator outer end have a slot base and at their radially inner end an air gap to a rotor that can be accommodated in the cylindrical opening, wherein stator windings with winding wires are arranged in the stator slots and the stator windings are designed as a wave winding with a first winding mat and a second winding mat, the first Winding mat comprises a group of first winding wires, the winding ends of which are each arranged over the same stator slot and the winding ends of the first group of winding wires each have a first winding end and a second winding end, where in which the
- stator according to the invention is therefore that an additional connection ring can be dispensed with, since no connection of winding ends in the circumferential direction from one side of the stator to the opposite side is required in order to connect the winding wire ends to one another.
- the stator according to the invention allows connections to be made only within two poles, which reduces the manufacturing effort and the production costs of the stator winding connection.
- the stator according to the invention is configured in particular for use within an electrical machine designed as a radial flux machine.
- Electrical machines are used to convert electrical energy into mechanical energy and/or vice versa, and generally include a stationary part referred to as a stator, stand or armature and a part referred to as a rotor or runner and arranged movably relative to the stationary part.
- the electric machine is intended in particular for use within a drive train of a hybrid or all-electric motor vehicle.
- the electrical machine is dimensioned in such a way that vehicle speeds of more than 50 km/h, preferably more than 80 km/h and in particular more than 100 km/h can be achieved.
- the electric motor particularly preferably has an output of more than 30 kW, preferably more than 50 kW and in particular more than 70 kW.
- the electrical machine provides speeds greater than 5,000 rpm, particularly preferably greater than 10,000 rpm, very particularly preferably greater than 12,500 rpm.
- the stator has a cylindrical structure and preferably consists of electrical laminations that are electrically insulated from one another and are constructed in layers and packaged to form laminations. This structure keeps the eddy currents in the stator caused by the stator field low. Distributed over the circumference, stator slots are let into the electrical sheet running parallel to the rotor shaft and accommodate the stator winding or parts of the stator winding.
- stator slots can be closed with locking elements such as locking wedges or covers or the like in order to prevent the stator winding from being detached.
- Stator teeth are components of the stator which are designed as circumferentially spaced, tooth-like radially inward or radially outward parts of the stator and between their free ends and a rotor body an air gap for the magnetic field is formed.
- a stator winding is an electrically conductive conductor whose length is significantly greater than its diameter.
- the stator winding can have any desired cross-sectional shape. Rectangular cross-sectional shapes are preferred, since they can be used to achieve high packing densities and consequently high power densities.
- a stator winding made of copper is very particularly preferably formed.
- a stator winding preferably has insulation.
- the stator can be provided in particular for use in an electric machine within a drive train of a motor vehicle.
- the drive train of a motor vehicle is understood to mean all components that generate the power for driving the motor vehicle in the motor vehicle and transmit it to the road via the vehicle wheels.
- the stator can preferably also be provided for use in an electric machine within a hybrid module for a motor vehicle.
- a hybrid module structural and functional elements of a hybridized drive train can be spatially and/or structurally combined and preconfigured, so that a hybrid module can be integrated in a particularly simple manner into a drive train of a motor vehicle.
- an electric machine and a clutch system in particular with a separating clutch for coupling the electric machine into and/or decoupling the electric machine from the drive train, can be present in a hybrid module.
- the stator can particularly preferably also be used in an electric axle drive train within a drive train of a Motor vehicle be provided.
- An electric final drive train of a motor vehicle includes an electric machine and a transmission, the electric machine and the transmission forming a structural unit. This structural unit is sometimes also referred to as the E-axis.
- the winding ends of the first group of winding wires and the winding ends of the second group of winding wires are arranged opposite one another in the circumferential direction in the stator slots of the stator.
- the winding ends of the first group of winding wires are arranged in circumferentially adjacent stator slots and/or the winding ends of the second group of winding wires are arranged in circumferentially adjacent stator slots, which reduces the wiring complexity due to the corresponding spatial Proximity of the winding ends to be interconnected further reduced.
- stator windings can be designed for use in an in particular 3-phase induction machine.
- the invention can also be further developed such that the interconnection of the first group of winding wires of the first winding mat and the second group of winding wires of the second winding mat is identical, which means that complexity and costs can be reduced by using identical components. Furthermore, through the Use of identical winding mats enables simplified installation of the winding mats.
- stator windings have a number n of more than two winding mats and the winding mats are arranged circumferentially offset from one another by n/360° in the stator slots of the stator.
- Figure 1 is a cross-sectional view of an electrical machine with a
- FIG. 2 shows a motor vehicle with a hybrid and fully electric drive train in a schematic block circuit view
- FIG. 3 shows a wound stator in a schematic top view of an end of the stator on the winding head side
- FIG. 3a shows a wound stator in a schematic cross-sectional view
- FIG. 4 shows a wiring diagram of a stator with 36 stator slots and two
- FIG. 1 shows a stator 1 for an electrical machine 2.
- the electrical machine 2 is configured as a radial flux machine in which a cylindrical rotor 24 rotates within the stator 1 of the electrical machine 2.
- the stator 1 has a cylindrical opening 5 corresponding to the rotor 24 and extending axially through the stator 1 axial length of the stator 1 formed stator slots 7 are present.
- the stator slots 7 each have a slot base 14 at their radially outer end and an air gap 15 at their radially inner end to a rotor 16 which can be accommodated in the cylindrical opening 5 .
- the stator windings 8 are arranged in the stator slots 7 with winding wires 9 .
- the stator windings 8 are designed as a wave winding with a first winding mat 10 and a second winding mat 11, the first winding mat 10 and the second winding mat 19 being of essentially identical design.
- FIG. 3 shows an embodiment of the stator 1 with 24 essentially identically designed stator slots 7 distributed equidistantly over the circumference of the cylindrical stator 1 .
- the winding ends 13, 21 are in the axial direction above the stator slots 7. From the illustration in FIG .
- a pole is formed by the windings in three consecutive stator slots 7.
- the winding ends 22, 23 are shifted relative to one another, so that the winding ends 22, 23 end over the same stator slot 7, as can be seen in the top view of the end winding in FIG. Figure 3 shows that the first winding mat 10 has a group of first winding wires 12, the winding ends 13 of which are each arranged over the same stator slot 7, and the winding ends 13 of the first group of winding wires 12 each have a first winding end 17 and a second winding end 18 exhibit.
- the first winding end 17 of the first group of winding wires 12 is in contact with the slot base 14 and the second winding end 18 of the first group of winding wires 12 is in contact with the air gap 15 of this stator slot 7 .
- the second winding mat 19 has a group of second winding wires 20, the winding ends 21 of which are each arranged over the same stator slot 7 and the winding ends 21 of the second group of winding wires 20 each have a first winding end 22 and a second winding end 23.
- the first winding end 22 of the second group of winding wires 20 is positioned facing the slot base 14 and the second winding end 23 of the second group of winding wires 20 is positioned facing the air gap 15 of this stator slot 7 .
- winding ends 13 of the first group of winding wires 12 and the winding ends 21 of the second group of winding wires 20 are arranged opposite one another in the circumferential direction in the stator slots 7 of the stator 1.
- the winding ends 13 of the first group of winding wires 12 and the winding ends 21 of the second group of winding wires 20 are arranged in circumferentially adjacent stator slots 7 .
- winding ends 22, 23 it is possible for the winding ends 22, 23 to emerge from the stator slots 7 of the stator 1 at a common winding head end or at different winding head ends.
- FIG. 4 shows a possible embodiment of an interconnection topology of the stator winding 8 with two winding mats 10,19.
- the stator windings 8 shown are designed for use in a 3-phase induction machine.
- the area of the interconnection of the stator 1 a total of 36 grooves 7 on. It should be pointed out at this point that FIG. 4 therefore does not show an interconnection topology of the stator 1 with 24 slots known from FIGS. 3, 3a.
- the magnetic polarity 27 generated in a slot 7 is indicated above or below the number designating the sequence of a slot 7 with a + or -.
- the individual winding wires 12,20 are designated alphanumerically, with the letter indicating the phase of a winding wire 12,20 and the number that follows the group associated with a winding wire 12,20.
- the framed, alphanumerically designated winding wires 12, 20 each identify their winding ends.
- the upper wiring diagram shows the wiring on the first end face of the stator 1
- the lower wiring diagram shows the wiring on the second end face of the stator 1.
- two winding mats 10, 19, each with 18 winding wires 12, 20, are arranged offset from one another by 180° over the stator circumference.
- the first winding mat 10 is thus inserted into the slots 1-18, while the second winding mat 19 is arranged in the slots 19-36.
- winding wires 12, 20 of a winding mat 10, 19 run in the radial direction, beginning at one of the end faces of the stator 1 near the yoke of a slot 7, running through it in the axial direction and exiting the corresponding slot 7 on the opposite end side of the stator.
- the number of turns depends on the number of slots 7 and the number of winding wires 12.20 per slot 7. This means that a motor with 36, 54, 72 or 90 slots 7 and with 4, 6, 8, etc. conductors per slot can be connected in the same way.
- connection of the first winding mat 10 in the exemplary embodiment shown in FIG. 4 is carried out on the first end face a as follows:
- the winding wire 12 in the slot 7 numbered 2 is electrically connected to the winding wire 12 in the slot 7 numbered 10 .
- the winding wire 12 in the slot 7 numbered 3 is electrically connected to the winding wire 12 in the slot 7 numbered 11.
- the winding wire 12 in the slot 7 numbered 5 is electrically connected to the winding wire 12 in the slot 7 numbered 13 .
- the winding wire 12 in the slot 7 numbered 6 is electrically connected to the winding wire 12 in the slot 7 numbered 14.
- the winding wire 12 in the slot 7 numbered 8 is electrically connected to the winding wire 12 in the slot 7 numbered 16 .
- the winding wire 12 in the slot 7 numbered 9 is electrically connected to the winding wire 12 in the slot 7 numbered 17.
- connection of the first winding mat 10 in the exemplary embodiment shown in FIG. 4 is carried out on the first end face b as follows:
- the winding wire 12 in the slot 7 numbered 1 is electrically connected to the winding wire 12 in the slot 7 numbered 11.
- the winding wire 12 in the slot 7 numbered 2 is electrically connected to the winding wire 12 in the slot 7 numbered 12 .
- the winding wire 12 in the slot 7 numbered 4 is electrically connected to the winding wire 12 in the slot 7 numbered 14.
- the winding wire 12 in the slot 7 numbered 5 is electrically connected to the winding wire 12 in the slot 7 numbered 15.
- the winding wire 12 in the slot 7 numbered 7 is electrically connected to the winding wire 12 in the slot 7 numbered 17 .
- the winding wire 12 in the slot 7 numbered 8 is electrically connected to the winding wire 12 in the slot 7 numbered 18 .
- the winding wire 20 in the slot 7 numbered 20 is electrically connected to the winding wire 20 in the slot 7 numbered 28 .
- the winding wire 20 in the slot 7 numbered 21 is electrically connected to the winding wire 20 in the slot 7 numbered 29 .
- the winding wire 20 in the slot 7 numbered 23 is electrically connected to the winding wire 20 in the slot 7 numbered 31 .
- the winding wire 20 in the slot 7 numbered 24 is electrically connected to the winding wire 20 in the slot 7 numbered 32 .
- the winding wire 20 in the slot 7 numbered 26 is electrically connected to the winding wire 20 in the slot 7 numbered 34 .
- the winding wire 20 in the slot 7 numbered 27 is electrically connected to the winding wire 20 in the slot 7 numbered 35 .
- the interconnection of the second winding mat 19 in the exemplary embodiment shown in FIG. 4 is carried out on the first end face a as follows:
- the winding wire 20 in the slot 7 numbered 19 is electrically connected to the winding wire 20 in the slot 7 numbered 29.
- the winding wire 20 in the slot 7 numbered 20 is electrically connected to the winding wire 20 in the slot 7 numbered 30 .
- the winding wire 20 in the slot 7 numbered 22 is electrically connected to the winding wire 20 in the slot 7 numbered 32 .
- the winding wire 20 in the slot 7 numbered 23 is electrically connected to the winding wire 20 in the slot 7 numbered 33 .
- the winding wire 20 in the slot 7 numbered 25 is electrically connected to the winding wire 2 in the slot 7 numbered 35.
- the winding wire 20 in the slot 7 numbered 26 is electrically connected to the winding wire 20 in the slot 7 numbered 36 .
- stator 1 After the winding wires 12 of the first winding mat 10 have run repeatedly through the stator 1, they each end on the other side (a,b) of the end winding near the air gap.
- the winding wire 12 protruding from the stator 1 ends in the slot 7 numbered 1 (A1) on the first face a in the slot 7 numbered 3 (A1) on the second face b of the stator 1.
- the stator 1 is intended in particular for use in a hybrid or all-electric drive train 3 of a motor vehicle 4, as is shown in FIG. 2 by way of example.
- stator slots 8 stator windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22708737.6A EP4302386A1 (de) | 2021-03-05 | 2022-02-08 | Stator |
US18/280,307 US20240072593A1 (en) | 2021-03-05 | 2022-02-08 | Stator |
CN202280017650.XA CN116888864A (zh) | 2021-03-05 | 2022-02-08 | 定子 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021105323.4A DE102021105323A1 (de) | 2021-03-05 | 2021-03-05 | Stator |
DE102021105323.4 | 2021-03-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022184205A1 true WO2022184205A1 (de) | 2022-09-09 |
Family
ID=80683842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2022/100107 WO2022184205A1 (de) | 2021-03-05 | 2022-02-08 | Stator |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240072593A1 (de) |
EP (1) | EP4302386A1 (de) |
CN (1) | CN116888864A (de) |
DE (1) | DE102021105323A1 (de) |
WO (1) | WO2022184205A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007409A1 (de) | 2008-02-04 | 2009-08-06 | Continental Automotive Gmbh | Kontaktring für einen Elektromotor, der in Sternschaltung betrieben wird |
US20160308415A1 (en) * | 2013-04-11 | 2016-10-20 | Feaam Gmbh | Electric machine |
CN112217306A (zh) * | 2019-07-10 | 2021-01-12 | 济南拉斐叶电力科技有限公司 | 一种多相绕组及其定子组件和电机 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5471389B2 (ja) | 2008-12-15 | 2014-04-16 | 株式会社デンソー | 回転電機の固定子 |
FR2947968A1 (fr) | 2009-07-09 | 2011-01-14 | Valeo Equip Electr Moteur | Bobinage d'une machine electrique tournante |
DE102012206684A1 (de) | 2011-05-10 | 2012-11-15 | Robert Bosch Gmbh | Elektrische Maschine mit Wellenwicklung und parallelen Stromzweigen |
DE102016212382A1 (de) | 2016-07-07 | 2018-01-11 | Zf Friedrichshafen Ag | Verfahren und Adapter zum Wickeln eines Spulenkorbs |
DE102016118871A1 (de) | 2016-10-05 | 2018-04-05 | Elmotec Statomat Holding GmbH | Spulenwicklung für Statoren oder Rotoren |
JP6683747B2 (ja) | 2018-02-19 | 2020-04-22 | 本田技研工業株式会社 | 回転電機用コイル |
CN112585848B (zh) | 2018-08-10 | 2024-07-26 | 博格华纳公司 | 形成用于电机的部件的方法 |
DE102020103165A1 (de) | 2019-05-16 | 2020-11-19 | Schaeffler Technologies AG & Co. KG | Stator für eine elektrische Maschine mit bandförmiger Wicklungseinheit für eine Statorwicklung und Verfahren zu dessen Herstellung |
-
2021
- 2021-03-05 DE DE102021105323.4A patent/DE102021105323A1/de not_active Ceased
-
2022
- 2022-02-08 EP EP22708737.6A patent/EP4302386A1/de not_active Withdrawn
- 2022-02-08 WO PCT/DE2022/100107 patent/WO2022184205A1/de active Application Filing
- 2022-02-08 CN CN202280017650.XA patent/CN116888864A/zh active Pending
- 2022-02-08 US US18/280,307 patent/US20240072593A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008007409A1 (de) | 2008-02-04 | 2009-08-06 | Continental Automotive Gmbh | Kontaktring für einen Elektromotor, der in Sternschaltung betrieben wird |
US20160308415A1 (en) * | 2013-04-11 | 2016-10-20 | Feaam Gmbh | Electric machine |
CN112217306A (zh) * | 2019-07-10 | 2021-01-12 | 济南拉斐叶电力科技有限公司 | 一种多相绕组及其定子组件和电机 |
Also Published As
Publication number | Publication date |
---|---|
DE102021105323A1 (de) | 2022-09-08 |
US20240072593A1 (en) | 2024-02-29 |
CN116888864A (zh) | 2023-10-13 |
EP4302386A1 (de) | 2024-01-10 |
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