EP3763020A1 - Wickelschema für eine elektrische maschine - Google Patents
Wickelschema für eine elektrische maschineInfo
- Publication number
- EP3763020A1 EP3763020A1 EP19703700.5A EP19703700A EP3763020A1 EP 3763020 A1 EP3763020 A1 EP 3763020A1 EP 19703700 A EP19703700 A EP 19703700A EP 3763020 A1 EP3763020 A1 EP 3763020A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- strands
- coil
- wave winding
- grooves
- 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
- 238000004804 winding Methods 0.000 title claims abstract description 105
- 239000004020 conductor Substances 0.000 claims description 39
- 230000006698 induction Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000796 flavoring agent Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010276 construction Methods 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
-
- 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
- H02K15/06—Embedding prefabricated windings in the machines
- H02K15/062—Windings in slots; Salient pole windings
- H02K15/064—Windings consisting of separate segments
-
- 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
- H02K15/06—Embedding prefabricated windings in the machines
- H02K15/062—Windings in slots; Salient pole windings
- H02K15/065—Windings consisting of complete sections, e.g. coils or waves
- H02K15/067—Windings consisting of complete sections, e.g. coils or waves inserted in parallel to the axis of the slots or inter-polar channels
-
- 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
Definitions
- the present invention relates to a winding scheme for an electrical machine and an electrical machine with a corresponding winding.
- DE 10 2014 223 202 A1 discloses in the prior art that windings distributed in an electrical machine are provided with a plurality of conductors distributed over the circumference.
- the object of the present invention is to provide a winding scheme which is simple and quick to produce and enables operation of the electric machine with high performance and low losses. Another object is to keep the required space, especially in the axial direction, as small as possible.
- a shaft winding for an electric machine having at least one phase and a fixed number of poles, which corresponds to a number of poles distributed over a circumference of the electric machine
- the electric machine comprises a rotor and a stator, wherein the rotor or the stator has slots for receiving the wave winding of a distributed winding, wherein two coil strands are provided in parallel connected per phase, wherein the coil strands each have a connection pin at both ends and each comprise at least three series strands connected in series each sub-string extends once around the circumference, each sub-strand has a plurality of conductor elements corresponding to the number of poles of the electrical machine, wherein an even number of circumferentially adjacent conductor elements are each connected by a turnaround to a hairpin, each hairpin s having one ends contact areas, which in each case as a contact pin for Connected to a neighboring hairpin or pin terminal, wherein the conductor elements are received in layers in the grooves and two adjacent layers in the
- the invention thus comprises a wave winding, which represents a distributed winding in which the coils of the winding are respectively distributed over the circumference of the electric machine.
- the electric machine has at least one phase, whereby more phases, in particular three phases, can be provided.
- a fixed number of magnetic poles are distributed over an area of the electric machine, this number corresponds to the number of poles and is even, since there is an equal number of magnetic north and south poles.
- Either the rotor, the stator or rotor and stator of the electric machine have grooves for receiving the wave winding.
- Two phase coils are provided in parallel in each phase.
- the coil strands have a connection pin at their two ends and are each divided into at least three sub-strands connected in series.
- Each sub-string has one of the number of poles of the electrical machine corresponding plurality of conductor elements and thus extends once around the circumference. At least two adjacent conductor elements are each connected to one another by a turning region. It is also possible for a plurality of conductor elements to be connected to one another with an even number, so that the free ends of the connected conductor ends lie in the axial direction on the same side, which facilitates the manufacture and assembly and the connection of the conductor elements to the waveguide Coil string simplified.
- the term hairpin is generally used for the connected conductor elements, which is usually used for an embodiment with two conductor elements, but in the meaning of the application also stands for waveguides with more than two conductor elements described above. Each hairpin has contact areas at its free ends.
- the turning region is preferably formed in one piece with the conductor elements.
- the contact region is designed as a contact pin, which is connected to the electrically conductive connection, for example by welding, to a corresponding contact pin of an adjacent hairpin of the coil strand.
- the contact region can also be designed as a connection pin, which is designed to connect the coil strand, more precisely the two ends of a coil strand, to power electronics for controlling the electrical machine.
- contact pins and connection pins have the same geometric design, whereby the number of different parts is reduced, which reduces the cost and installation costs, with different geometries are possible, for example, to facilitate the connection to the power electronics.
- Embodiments are characterized in that the wave winding has a number of holes of three and thus three directly adjacent grooves per pole are provided. As a result, the operating noise and losses, for example by avoiding or reducing harmonics, the electric machine can be reduced.
- Per double layer three sub-strands are provided for each coil strand and at least one sub-strand per double layer is wound in the circumferential direction of the opposite direction. As a result of this design, the losses are also reduced, since circulating currents are largely avoided.
- Mutual unequal induction of the voltage produces circulating currents. By a symmetrical design of the parallel strands to each other, the mutual induction is the same size and thus repeals. This prevents the circulating currents, which would otherwise lead to considerable losses.
- Embodiments of a wave winding are characterized in that the two sub-strands per double layer, which are wound in the same circumferential direction, are arranged in the outer grooves per pole. As a result, a symmetrical structure is achieved, which reduces the reduction of losses due to mutual induction.
- Preferred embodiments of a wave winding are characterized in that between two adjacent conductor elements, a winding step is provided, which is three times the number of phases of the electric machine, and that in the sub-strands in the outer grooves of the circumferentially last turning region has a winding step, the order two grooves is deviated from the winding step of nine to change between the outer grooves, and that between the partial strands with different direction of the winding on the side of the contact pins, a winding step which deviates by one groove from the winding step of nine is provided to switch between an outer and middle groove.
- a winding step of nine so the conductor elements of a hairpin are arranged offset by nine grooves.
- a winding step is performed deviating per sub-strand. For a change between the outer grooves with the same direction of the winding, the deviating winding step at the last turning region of the sub-strand and thus not on the side of the contact pins or the connection pins for the connection to the power electronics, but on the axially opposite side of the wave winding.
- the last turning region has a winding step of seven or eleven, depending on whether it is changed from a winding-direction rearward groove to a forward groove or from a front groove to a rearward groove.
- a change between an outer and the middle groove takes place with a winding step which deviates by one groove, thus eight or ten for three phases, depending on whether a change is made between a middle groove and a front groove or rear groove.
- Embodiments of a wave winding are characterized in that the change of the direction of the winding between the partial strands takes place in a radially inner or outer layer.
- the change of the direction of the winding between the partial strands takes place in a radially inner or outer layer.
- Wave windings according to embodiments of the invention are characterized in that only once the direction of the winding is changed per coil strand.
- the change between the directions of the winding takes place only once per coil strand and phase.
- a coil strand passes from the terminal pin either initially alternately the outer grooves of possibly several double bearings to a radially outer layer and there changes from an outer groove in the middle groove, at the same time the direction of the winding is reversed or vice versa so first through the middle Grooves and then in the reverse direction of the winding through the outer grooves back to the second terminal pin of the coil strand.
- Embodiments of a wave winding are characterized in that per pole in the circumferential direction adjacent conductor elements of different sub-strands of a coil strand are arranged in radially adjacent layers.
- per pole in the circumferential direction adjacent conductor elements of different sub-strands of a coil strand are arranged in radially adjacent layers.
- the conductor elements of a coil strand in the outer grooves or in the middle groove are alternately in one position.
- the respective other positions are occupied by the corresponding conductor elements of a further coil strand, which therefore has the same design with per layer alternately occupied outer grooves and middle groove.
- Wave winding according to embodiments are characterized in that the sum of the partial strands of both coil strands with the same direction of the winding is equal to the sum of the partial strands of both coil strands with opposite direction of the winding. This is achieved in that the direction of the winding in the outer grooves or middle groove of the two coil strands is different, and of the six - two layers with three slots each - conductor elements per double layer have three the same direction of the winding. If one looks at the entire stator, the coil strands or their partial strands pass through the same slot orientations of the same layers with exactly the same number of times. This means that, for example, position 1 in the middle groove of the first and second coil strand is traversed the same number of times.
- Embodiments of a wave winding are characterized in that the connection pins of the two coil strands are arranged in the same pole. With such a design, the required angular range for the connections to the power electronics is reduced, whereby corresponding space can be saved.
- connection pins of the two coil strands are arranged in the same radially inner or outer layer. This space can be saved in the axial direction, since the connections can be made in the radial direction.
- connection pins in the radially outer layer can be converted radially outwards or correspondingly radially inward in the case of a radially inner layer, for which reason a connection to the power electronics can take place in the radial direction.
- connection pins are arranged both in an inner or externa ßeren position and in the same pole.
- the End pin of a coil strand in an outer groove and the connection pin of the other coil strand in the middle groove With such embodiments, the required space for connection to the power electronics can be minimized both in the axial direction and in the circumferential direction of the electric machine.
- stator for an electrical machine which is characterized in that the stator is provided with a wave winding according to the preceding description and an electric machine, in which a wave winding is provided as described above.
- Fig. 1 illustrates an embodiment of a stator with a wave winding.
- Fig. 2 (A, B, C, D) shows a winding diagram for a coil strand of FIG. 1 represents.
- Fig. 3 shows a winding scheme for another coil strand according to
- Fig. 1 represents.
- FIG. 2 was divided into four parts, corresponding to FIGS. 2A, 2B, 2C and 2D, FIG. 2A showing the upper left area, FIG. 2B the upper right area, FIG. 2C shows the lower left area and FIG. 2D shows the lower right area of FIG. 2.
- Fig. 1 shows an embodiment of a stator (1) with a wave winding.
- the stator (1) has a stator body (2), in which grooves (3) are formed for receiving the shaft winding.
- grooves (3) conductor elements are introduced in the example shown in the form of hairpins, wherein per groove (3) a plurality of conductor elements are introduced in layers.
- the hairpins of the illustrated example each comprise two conductor elements, a turning region W, in which the conductor elements are integrally connected to one another, and contact regions K at the ends of the hairpin.
- the hairpins are apart from the respective first and last hairpin of the individual coil strands in their contact areas K with two contact pins (4) executed, which are each electrically connected to the hairpin adjacent in the coil strand, more precisely its corresponding contact pin (4).
- the respective first and last hairpin of a coil strand has a contact pin (4) for connection to the adjacent hairpin of the coil strand and a connection pin (5, 5 ') for connection to power electronics (not shown).
- all the contact pins (4) of the wave winding on the same axial side of the stator (1) are arranged, whereby correspondingly the turning portions W of the hairpins on the opposite axial side of the stator (1) are arranged.
- each comprising two conductor elements variants are also possible in which more than two conductor elements per hairpin, which can then also be referred to as a waveguide, are provided.
- all contact pins (4) are furthermore advantageously on the same axial side, whereby corresponding turning regions W are additionally arranged on the side of the contact pins (4).
- connection pins (5, 5 ') of the individual coil strands are each provided in the radially outer layer of the wave winding in the example shown, and the connection pins (5, 5') of the two parallel coil strands per phase are each arranged in the same pole. Due to the arrangement in the radially externa ßeren position can be made a connection to the power electronics in the radial direction, whereby no or only minimal space is required in the axial direction. By the arrangement in the same pole, the connection pins (5) for the cathode and the connection pins (5 ') for the anode are each arranged directly adjacent in pairs.
- connection pins (5) for the cathode and the connection pins (5 ') for the anode are circumferentially offset one pole. This offset by one pole corresponds to a different one of the normal winding step of the wave winding number of grooves for each coil strand, since each coil strand in each case one of the connection pins (5, 5 ') in a middle groove (3) or an outer ßeren groove ( 3) of the corresponding poles. Due to this design, only a small area of the circumference is required for the connection of a phase to the power electronics, which corresponds to a winding step.
- connection pins (5, 5 ') of the respective phases in adjacent slots are provided in several phases, as in the illustrated example three phases, the areas of the circumference required for connection to the power electronics overlap and the correspondingly required installation space can be minimized become.
- FIG. 2 shows a winding diagram for a first coil strand for one phase according to the example illustrated in FIG. 1.
- the grooves (3) In the upper area (FIGS. 2A and 2B), a development of the grooves (3) is shown with a representation of the eight layers, and thus four double layers, per groove (3).
- the conductor elements for one phase in the three grooves (3) per pole are numbered such that the number is one letter for the coil strand, one number for the double layer and one number for a consecutive numbering of the hairpins in the current flow direction for the outer grooves (3) capital letters and for the middle groove (3) lower case letters are used.
- the conductor elements adjacent to the connection pins (5, 5 ') or, to put it another way, the corresponding first and last conductor elements of the coil. lenstrzane are marked with arrows, the solid-line arrow represents the first coil strand shown in Fig. 2 and the parallel second coil strand of the phase is marked by dashed lines arrow.
- the individual partial strands for the first coil strand with the corresponding interconnection are shown.
- the sub-strands are each divided into blocks in the double layers corresponding blocks and the individual sub-strands per double layer are shown in separate lines.
- the substrings in the rows are shown as wavy lines corresponding to the flavor pins, with the upper shaft portions corresponding to the contact areas K and the lower shaft portions corresponding to the turning areas W, and these two shaft portions respectively execute the winding step.
- the conductor elements are represented by the vertical sections of the wave-shaped line, wherein the positioning of the conductor element in the first or second layer of the double layer is indicated by differently inclined markings.
- the connecting pins (5, 5 ') and contact pins (4) of the Flairpins are shown in the upper portion of the wellenförmigen lines, directly adjacent contact pins (4) within a sub-string are electrically conductively connected to each other, for example by welding. Interconnected contact pins (4) of different sub-strands are connected by corresponding arrows.
- the first coil strand as shown in FIG. 2, first passes through the radially outer double layer in the left grooves (3) of the poles and changes with the turning section W of the last flavor pin of the partial strand through one of nine different winding steps of eleven in FIG the right-hand groove (3). Subsequently, the second partial strand passes through the right-hand grooves (3) until the last turning region W changes back into the left-hand groove with a winding step of seven.
- the second sub-string passes through a corresponding connection of the contact pins (4) in the third sub-string, which runs in the same direction of the winding analogous to the first sub-strand through the next double layer.
- the ninth sub-strand which passes through the middle grooves in the radially inner double layer in the opposite direction, then passes into the tenth sub-strand, which also passes through the middle grooves in the adjacent double layer.
- the partial strands in the middle grooves have a constant winding step of nine and accordingly pass through the double layers to the radially externa ßeren double layer.
- the last hairpin of the twelfth sub-string has at its end, which also shows the end of the first coil strand, corresponding to the connection pin (5) for connection to the power electronics.
- FIG. 3 shows a winding diagram for a second coil strand for one phase according to the example shown in FIG. 1, which is connected in parallel to the first coil strand in FIG. 2.
- the illustration is constructed analogously to FIG. 2, the second coil strand firstly, starting from the connection pin (5 '), passing through the middle grooves of the double layers as far as the radially inner double layer.
- the direction of the winding in the middle grooves corresponds to the direction of the winding of the first coil strand in the outer grooves.
- the radially inner double layer of the change of the direction of the winding also takes place on the side of the contact areas K, in which case is changed accordingly from a middle groove in an externa ßere, more precisely right, groove.
- the partial strands of the second coil strand pass through the outer grooves of the double layers to the radially outer double layer and terminate in the connecting pin (5).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018203471.0A DE102018203471A1 (de) | 2018-03-08 | 2018-03-08 | Wickelschema für eine elektrische Maschine |
| PCT/EP2019/052830 WO2019170349A1 (de) | 2018-03-08 | 2019-02-06 | Wickelschema für eine elektrische maschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3763020A1 true EP3763020A1 (de) | 2021-01-13 |
Family
ID=65324374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19703700.5A Pending EP3763020A1 (de) | 2018-03-08 | 2019-02-06 | Wickelschema für eine elektrische maschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3763020A1 (de) |
| DE (1) | DE102018203471A1 (de) |
| WO (1) | WO2019170349A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019215094A1 (de) * | 2019-10-01 | 2021-04-01 | Zf Friedrichshafen Ag | Wickelschema für eine elektrische Maschine |
| DE102019215097A1 (de) | 2019-10-01 | 2021-04-01 | Zf Friedrichshafen Ag | Spulenelement für eine elektrische Maschine |
| DE102019218115A1 (de) * | 2019-11-25 | 2021-05-27 | Robert Bosch Gmbh | Maschinenkomponente für eine elektrische Maschine |
| DE102020001770A1 (de) | 2020-03-17 | 2021-09-23 | Daimler Ag | Stator für eine elektrische Maschine |
| DE102020207906A1 (de) * | 2020-06-25 | 2021-12-30 | Zf Friedrichshafen Ag | Verteilte Wicklung |
| DE102022208027A1 (de) * | 2022-08-03 | 2024-02-08 | Zf Friedrichshafen Ag | Wicklung, Komponente für eine elektrische Maschine und Verfahren zum Herstellen einer Wicklung |
| DE102022208032A1 (de) * | 2022-08-03 | 2024-02-08 | Zf Friedrichshafen Ag | Wicklung, Komponente für eine elektrische Maschine und Verfahren zum Herstellen einer Wicklung |
| DE102022208142A1 (de) * | 2022-08-04 | 2024-02-15 | Zf Friedrichshafen Ag | Wicklung, Komponente für eine elektrische Maschine und Verfahren zum Herstellen einer Wicklung |
| DE102023203094A1 (de) | 2023-04-04 | 2024-10-10 | Zf Friedrichshafen Ag | Wicklung mit Coverpins |
| DE102023203093A1 (de) | 2023-04-04 | 2024-10-10 | Zf Friedrichshafen Ag | Hairpin-Wicklung mit modifiziertem Rücksprungbereich |
| DE102023134056A1 (de) | 2023-12-05 | 2025-06-05 | Valeo Eautomotive Germany Gmbh | Stator für eine elektrische Maschine, elektrische Maschine zum Antreiben eines Fahrzeugs und Fahrzeug |
| DE102023134055A1 (de) | 2023-12-05 | 2025-06-05 | Valeo Eautomotive Germany Gmbh | Stator für eine elektrische Maschine, elektrische Maschine zum Antreiben eines Fahrzeugs und Fahrzeug |
| DE102024129630A1 (de) | 2024-10-14 | 2026-04-16 | Valeo Eautomotive Germany Gmbh | Stator für eine elektrische Maschine, elektrische Maschine für eine Fahrzeug und Elektroantrieb für ein Fahrzeug |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10321956B4 (de) * | 2002-05-15 | 2013-09-12 | Remy Inc. | Wicklungen aus rechtwinkligen Kupferhaarnadeln in mehreren Sätzen für elektrische Maschinen |
| US7622843B2 (en) | 2006-06-12 | 2009-11-24 | Rerry International, Inc. | Terminals and connections between multi-set segmented hairpin windings |
| WO2014034157A1 (ja) * | 2012-08-31 | 2014-03-06 | 三菱電機株式会社 | 回転電機およびその製造方法 |
| WO2015180811A1 (de) * | 2014-05-28 | 2015-12-03 | Sew-Eurodrive Gmbh & Co. Kg | Elektrische maschine und verfahren zum herstellen einer elektrischen maschine |
| DE102014223202A1 (de) | 2014-11-13 | 2016-05-19 | Volkswagen Aktiengesellschaft | Wellenwicklung, Stator und elektrische Maschine |
| JP6330656B2 (ja) * | 2014-12-26 | 2018-05-30 | 株式会社デンソー | 回転電機の固定子 |
-
2018
- 2018-03-08 DE DE102018203471.0A patent/DE102018203471A1/de active Pending
-
2019
- 2019-02-06 WO PCT/EP2019/052830 patent/WO2019170349A1/de not_active Ceased
- 2019-02-06 EP EP19703700.5A patent/EP3763020A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018203471A1 (de) | 2019-09-12 |
| WO2019170349A1 (de) | 2019-09-12 |
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