WO2022218470A1 - Elektrische axialflussmaschine - Google Patents
Elektrische axialflussmaschine Download PDFInfo
- Publication number
- WO2022218470A1 WO2022218470A1 PCT/DE2022/100260 DE2022100260W WO2022218470A1 WO 2022218470 A1 WO2022218470 A1 WO 2022218470A1 DE 2022100260 W DE2022100260 W DE 2022100260W WO 2022218470 A1 WO2022218470 A1 WO 2022218470A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- shaped stator
- annular disk
- stator body
- shaped
- Prior art date
Links
- 230000004907 flux Effects 0.000 title claims abstract description 16
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- 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
- H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
-
- 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
-
- 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
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
- H02K2211/03—Machines characterised by circuit boards, e.g. pcb
Definitions
- the present invention relates to an electrical axial flux machine, comprising a stator and a rotor, the rotor having a rotor shaft, in particular in the form of a hollow shaft, with at least one first disk-shaped rotor body arranged on the rotor shaft in a rotationally and non-displaceably fixed manner, with the stator having a first ring-shaped disk stator body and a second annular disk-shaped stator body, which are arranged coaxially to one another and to the rotor shaft and are spaced apart axially with the rotor being arranged in between, and a first air gap between the first annular disk-shaped stator body and the rotor spaced apart in the axial direction and between the second annular disk-shaped stator body and the rotor is formed with a second air gap, the rotor having a plurality of receiving slots distributed equidistantly over the circumference and running radially through the rotor body, in each of which a rotor magnet is fixed, where
- An axial flux machine is a dynamo-electric machine in which the magnetic flux between the rotor and stator runs parallel to the axis of rotation of the rotor. Often, both the stator and the rotor are largely disc-shaped. Axial flow machines are particularly advantageous when the space available axially is limited in a given application. This is often the case, for example, with electric drive systems for electric vehicles.
- an axial flux machine comprises at least one stator, which has windings for generating the axially aligned magnetic field. At least one rotor is fitted with permanent magnets, for example, whose magnetic field interacts with the magnetic field of the stator windings to generate a drive torque via an air gap.
- a stator for an axial flow machine is known, which is designed in the form of a printed circuit board (PCB).
- PCB printed circuit board
- the PCB is designed as a multilayer board, i.e. it comprises several layers with conductor tracks on top of each other. This allows the windings of a coil to be distributed over these multiple layers. It is also known from the document that one turn of a winding can extend over several layers of the multilayer circuit board.
- Such axial flow machines are also used, for example, in unmanned drones. Due to the design of such axial flow machines, part of the magnetic field can also escape at the circumference of the rotor and then generates eddy currents in the motor housing. These lead to increased engine losses, which is regularly undesirable.
- an electrical axial flux machine comprising a stator and a rotor, the rotor having a rotor shaft which is in particular formed as a hollow shaft and having at least one first rotor body which is designed in the shape of a disk and is arranged on the rotor shaft in a rotationally and non-displaceably fixed manner, the stator having a first annular disc-shaped stator body and a second annular disc-shaped stator body, which are arranged coaxially to each other and to the rotor shaft and axially to each other with the rotor being interposed are spaced apart and wherein a first air gap is formed between the first annular disk-shaped stator body and the rotor spaced apart in the axial direction and a second air gap is formed between the second annular disk-shaped stator body and the rotor, the rotor having a plurality of equidistantly distributed, radially through has receiving slots running along the rotor body, in each of which a rotor
- the motor housing which encloses the two stator bodies and sweeps over the rotor area, is provided with circumferential openings in the rotor area, which are preferably designed as axially extending slots.
- the openings can be formed in the motor housing without major changes to the housing dimensions and at low cost. This also applies in particular when the motor housing is advantageously designed as a deep-drawn part.
- the magnetic flux in an electrical axial flux machine according to the invention is directed in the air gap between the stator and rotor axially to a direction of rotation of the rotor of the axial flux machine.
- a known type is a so-called I-arrangement, in which the rotor is arranged axially next to a stator or between two stators.
- Another known type is a so-called H-arrangement, in which two rotors are arranged on opposite axial sides of a stator.
- the axial flow machine according to the invention can in particular be configured as an I type.
- a plurality of rotor-stator configurations it is also possible for a plurality of rotor-stator configurations to be arranged axially next to one another as an I-type and/or H-type.
- the rotor-stator configuration of the H-type and/or the I-type are of essentially identical design, so that they can be assembled in a modular manner to form an overall configuration.
- Such rotor-stator configurations can in particular be arranged coaxially to one another and can be connected to a common rotor shaft or to a plurality of rotor shafts.
- the rotor of an electrical axial flow machine can preferably be designed as a laminated rotor, at least in part.
- a laminated rotor is formed in layers in the axial direction.
- the rotor of an axial flow machine can alternatively also have a rotor carrier or rotor body, which is equipped with magnetic sheets and/or SMC material and is equipped with magnetic elements designed as permanent magnets.
- a rotor body preferably has an inner part, via which the rotor can be connected to a shaft in a rotationally fixed manner, and an outer part, which outwardly delimits the rotor in the radial direction.
- the rotor body can be designed with several rotor struts between the inner part and the outer part, via which the inner part and the outer part are connected to one another and which, together with the radial outer surface of the inner part and the radial inner surface of the outer part, has a receiving space for accommodating the magnetic elements and the Flow guide elements of the rotor forms.
- the magnetic elements can be arranged or placed on the rotor carrier.
- a magnet element can be in the form of a permanent magnet in the form of a bar magnet or in the form of smaller magnet blocks designed as blocks.
- the magnetic elements are usually arranged in, on or on a rotor carrier.
- the magnetic element, designed as a permanent magnet, of a rotor of an axial flux machine interacts with a rotating magnetic field which is generated by the stator winding coils, which are generally subjected to a three-phase current.
- a rotatably mounted shaft of an electrical machine is referred to as a rotor shaft, with which the rotor or rotor body is coupled in a rotationally test manner.
- the stator of an electrical axial flow machine preferably has a stator body with a plurality of stator windings arranged in the circumferential direction. Viewed in the circumferential direction, the stator body can be designed in one piece or in segments.
- the stator body can be formed from a laminated stator core with a plurality of laminated electrical laminations. Alternatively, the stator body can also be formed from a pressed soft magnetic material, such as the so-called SMC material (Soft Magnetic Compound).
- the first annular disk-shaped stator body and/or the second annular disk-shaped stator body are configured as a printed circuit board, in particular as a printed circuit, so that the stator body is particularly compact and inexpensive to produce.
- the printed circuit board is preferably a multilayer printed circuit board with several copper layers over which the stator windings extend.
- Another possible embodiment is the design of the stator body as a sandwich of several multilayer circuit boards.
- the motor housing is formed from a first ring disk and a second ring disk, which are connected to one another in a form-fitting and/or cohesive manner by means of connecting webs extending in the axial direction.
- a further possible embodiment is therefore the design of the motor housing as a multi-part motor housing in which the stators are each seated in electrically insulating housing parts and the connecting webs which connect the two housing parts.
- the connecting webs can, for example, be connected to the washers in the form of needles in a material, form-fitting and/or non-positive manner. As a result, a current flow along the outer edge of the openings in the solid material can be prevented.
- At least one of the ring disks is/are formed from one of the stator bodies designed as printed circuit boards, which enables a particularly compact design of the axial flow machine with a high level of component integration .
- the openings in the lateral surface of the motor housing completely sweep over the rotor body in its axial extent.
- a further possible improvement can thus be achieved in that the slot-like openings, for example, are significantly lengthened in the axial direction and extend beyond the stators in the axial direction in order to reduce eddy currents that run through the solid material of the motor housing at the outer edges of the openings .
- the openings in the lateral surface of the motor housing at least partially, preferably completely, sweep over the first annular disk-shaped stator body and/or the second annular disk-shaped stator body in the axial direction.
- first annular disk-shaped stator body and/or the second annular disk-shaped stator body is/are received in the motor housing in a rotationally fixed manner and is connected thereto, so that separate spacer elements between the stators can be dispensed with .
- the openings have an essentially rectangular contour whose axial extent is greater than their circumferential extent, which has turned out to be a good compromise between structural stability of the motor housing and the reduction of eddy currents.
- the motor housing made of a metallic Material and / or ceramic and / or a plastic and / or is formed from a composite material.
- the invention can also be advantageously implemented such that the housing is a needle bearing cage, which is configured in particular as a pocket cage and is intended for use in a needle roller bearing. This makes it possible to use an already existing component, which is manufactured in large numbers, as a result of which the manufacturing costs of the axial flow machine can be further optimized.
- FIG. 1 shows an axial flow machine in a perspective exploded view
- FIG. 2 shows a first embodiment of an axial flow machine in a perspective view, a side view and an axial sectional view
- Figure 3 shows a second embodiment of an axial flow machine in a perspective view
- FIG. 4 shows a third embodiment of an axial flow machine in a perspective view.
- Figure 1 shows an electrical axial flux machine 1, comprising a stator 2 and a rotor 3, the rotor 3 having a rotor shaft 30, in particular designed as a hollow shaft, with a first rotor body 31, which is designed in the shape of a disk and is arranged on the rotor shaft 30 in a rotationally and non-displaceably fixed manner.
- the stator 2 has a first ring-shaped stator body 21 and a second ring-shaped stator body 22, which are coaxial with each other and to the Rotor shaft 30 are arranged and spaced apart axially with the interposition of the rotor 3 vonei Nander.
- the rotor 3 has a plurality of receiving slots 32 distributed equidistantly over the circumference and running radially through the rotor body 31, in each of which a rotor magnet 33 is fixed.
- the axial flow machine 1 also includes a cylindrical motor housing 4 that encloses the first annular disc-shaped stator body 21 , the rotor 3 and the second annular disc-shaped stator body 22 in the axial direction.
- the cylindrical ring-shaped motor housing 4 has in its lateral surface 41 a number of openings 42 distributed over the circumference, which is not shown in the illustration in FIG. 1, but can be seen from the corresponding illustrations in FIG.
- the openings 42 in the lateral surface 41 of the motor housing 4 completely sweep over the rotor body 31 in its axial extent.
- the openings 42 have an essentially rectangular contour whose axial extent is greater than their circumferential extent.
- the motor housing 4 is formed from a metallic material.
- the motor housing 4 shown in FIG. 2 can in particular also be a needle bearing cage, which is configured in particular as a pocket cage and is intended for use in a needle roller bearing.
- the first annular disk-shaped stator body 21 and the second annular disk-shaped stator body 22 are formed as a printed circuit board, in particular as a printed circuit, out, which is sometimes referred to as a PCB (Printed Circuit Board).
- PCB Print Circuit Board
- FIG 3 an embodiment of the axial flow machine is shown, in which the openings 42 in the lateral surface 41 of the motor housing 4 the first annular disk-shaped stator body 21 and the second annular disk-shaped stator body 22 completely sweep in the axial direction.
- the first annular disk-shaped stator body 21 and the second annular disk-shaped stator body 22 are rotatably accommodated in the motor housing 4 and connected to it.
- FIG. 4 shows an embodiment of the axial flow machine in which the motor housing 4 is formed from a first annular disk 43 and a second annular disk 44, which are connected to one another in a form-fitting and/or cohesive manner by connecting webs 45 extending in the axial direction.
- the annular disks 43, 44 have receptacles for the connecting webs 45 which are arranged equidistantly in the circumferential direction and into which the connecting webs 45 can be inserted, in particular with a positive and/or non-positive fit.
- the connecting webs 45 can be formed from the same mate rial as the washers 43,44 or be different from this.
- At least one of the ring disks 43, 44 can also be formed from one of the stator bodies 21, 22 designed as printed circuit boards.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22716327.6A EP4324073A1 (de) | 2021-04-12 | 2022-04-07 | Elektrische axialflussmaschine |
US18/284,570 US20240162771A1 (en) | 2021-04-12 | 2022-04-07 | Electric axial flux machine |
CN202280017664.1A CN116897494A (zh) | 2021-04-12 | 2022-04-07 | 电动轴向磁通机 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021108979.4A DE102021108979B4 (de) | 2021-04-12 | 2021-04-12 | Elektrische Axialflussmaschine |
DE102021108979.4 | 2021-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022218470A1 true WO2022218470A1 (de) | 2022-10-20 |
Family
ID=81307841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2022/100260 WO2022218470A1 (de) | 2021-04-12 | 2022-04-07 | Elektrische axialflussmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240162771A1 (de) |
EP (1) | EP4324073A1 (de) |
CN (1) | CN116897494A (de) |
DE (1) | DE102021108979B4 (de) |
WO (1) | WO2022218470A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1674919U (de) * | 1954-02-10 | 1954-04-15 | Ind Schaeffler | Nadelkaefig mit sicherung gegen axiale verschiebung gegenueber einem laufring. |
US5097167A (en) * | 1985-03-27 | 1992-03-17 | Nippondenso Co., Ltd. | Rotary electric machine coil assemblies |
EP2863524A1 (de) | 2013-10-15 | 2015-04-22 | ABB Oy | Stator für eine Axialflussmaschine und Verfahren zur Kühlung eines Stator einer Axialflussmaschine |
US9071118B2 (en) * | 2009-06-23 | 2015-06-30 | National University Corporation Hokkaido University | Axial motor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10141822B2 (en) | 2015-05-04 | 2018-11-27 | Launchpoint Technologies, Inc. | Axial flux brushless permanent magnet electrical machine rotor |
JP2018529302A (ja) | 2015-08-11 | 2018-10-04 | ジェネシス ロボティクス エルエルピー | 電気機械 |
CN111900822B (zh) | 2020-08-11 | 2021-10-08 | 华中科技大学 | 一种集成式鼓风加热装置及其控制方法 |
-
2021
- 2021-04-12 DE DE102021108979.4A patent/DE102021108979B4/de active Active
-
2022
- 2022-04-07 US US18/284,570 patent/US20240162771A1/en active Pending
- 2022-04-07 WO PCT/DE2022/100260 patent/WO2022218470A1/de active Application Filing
- 2022-04-07 CN CN202280017664.1A patent/CN116897494A/zh active Pending
- 2022-04-07 EP EP22716327.6A patent/EP4324073A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1674919U (de) * | 1954-02-10 | 1954-04-15 | Ind Schaeffler | Nadelkaefig mit sicherung gegen axiale verschiebung gegenueber einem laufring. |
US5097167A (en) * | 1985-03-27 | 1992-03-17 | Nippondenso Co., Ltd. | Rotary electric machine coil assemblies |
US9071118B2 (en) * | 2009-06-23 | 2015-06-30 | National University Corporation Hokkaido University | Axial motor |
EP2863524A1 (de) | 2013-10-15 | 2015-04-22 | ABB Oy | Stator für eine Axialflussmaschine und Verfahren zur Kühlung eines Stator einer Axialflussmaschine |
Also Published As
Publication number | Publication date |
---|---|
CN116897494A (zh) | 2023-10-17 |
DE102021108979A1 (de) | 2022-10-13 |
US20240162771A1 (en) | 2024-05-16 |
EP4324073A1 (de) | 2024-02-21 |
DE102021108979B4 (de) | 2023-08-03 |
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