WO2025012003A1 - Vibrationsreduzierung durch verhinderung von radialem verschieben von rotormodulen - Google Patents
Vibrationsreduzierung durch verhinderung von radialem verschieben von rotormodulen Download PDFInfo
- Publication number
- WO2025012003A1 WO2025012003A1 PCT/EP2024/068464 EP2024068464W WO2025012003A1 WO 2025012003 A1 WO2025012003 A1 WO 2025012003A1 EP 2024068464 W EP2024068464 W EP 2024068464W WO 2025012003 A1 WO2025012003 A1 WO 2025012003A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- components
- rotor components
- hard particles
- end wall
- 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.)
- Ceased
Links
Classifications
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/12—Machines characterised by the modularity of some components
-
- 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
Definitions
- the present invention relates to a rotor for an electrical machine.
- the present invention particularly relates to a rotor for an electrical machine which has low noise and vibration emissions during operation.
- the present invention further relates to an electrical machine which has such a rotor.
- Electric motors are becoming more and more of a focus in mobility.
- Electric motors also known as electric machines, are often made up of a rotor and stator arrangement.
- the rotor often has a rotor package designed as a laminated core.
- the laminated cores are excited to vibrate via the electromagnetic tooth forces. These vibrations form both over the circumference and over the axial length. Ultimately, these vibrations are transmitted to the housing and the air and perceived as noise, which is generally perceived as disturbing.
- a rotor for an electrical machine comprising a shaft on which a plurality of rotor components are arranged, wherein the rotor components are positioned axially adjacent to one another, wherein at least one means for preventing or reducing a relative movement between at least two adjacent rotor components is provided on at least one axial end wall of at least one rotor component.
- Such a rotor has significant advantages over state-of-the-art solutions, particularly with regard to reduced noise and/or vibration emissions.
- the rotor described here is part of a stator-rotor arrangement which is part of an electrical machine or an electric motor.
- the rotor is driven by the stator in order to drive, for example, a shaft or a wheel of a motor vehicle.
- the rotor is set in rotation, which can lead to noise emissions.
- the rotor is constructed as described below.
- the rotor comprises a shaft on which a plurality of rotor components are arranged.
- the rotor components can be freely selected and can include, for example, a fan wheel, a compensating wheel or other attachments of the rotor located on the shaft, such as a rotor component.
- the rotor components preferably comprise one or more of the rotor packages, also referred to as stacks, and/or their attachments.
- Existing rotor packages can basically be designed as is known to those skilled in the art from electrical machines.
- the rotor packages can be designed as laminated cores.
- the rotor components are usually pressed onto the shaft and positioned in such a way that the rotor components are positioned axially adjacent to one another.
- the rotor components can touch axially, form a particularly small gap between them or one or more Intermediate elements may be provided axially between two rotor components, as described below.
- a means for preventing or reducing a relative movement of at least two adjacent rotor components to one another is provided on at least one axial end wall of at least one rotor component, i.e. a rotor component located on the shaft.
- An axial end wall is to be understood in particular as meaning that this wall is a wall arranged on an axial end region and arranged in a radially extending plane, which corresponds approximately to the base area of a cylinder.
- a relative movement of the rotor components to one another can result in particular from the fact that when the rotor components are pressed onto a shaft, no axial force remains between the rotor components. This basically enables a relative rotational or axial movement between the rotor components.
- any resulting noise or vibration emission can be prevented or at least reduced.
- the selection of the specific means to be used is generally optional and can be possible, for example, as described below.
- At least one means for preventing or reducing a relative movement between all rotor components can be provided.
- all rotor components are preferably arranged in such a way that relative movement between all adjacent rotor components can be reduced or completely prevented.
- a relative movement between the rotor components is prevented or at least reduced.
- a relative movement should not be limited to this, but can also include, for example, an axial relative movement or others.
- NVH behavior refers in particular to audible or noticeable vibrations in motor vehicles or machines.
- this can also improve the long-term stability of a rotor or an electrical machine. This is because reducing vibrations can also reduce wear-related damage.
- the invention is very easy to implement because the basic arrangement of the rotor and stator does not need to be changed.
- the corresponding means only need to be arranged at the axial ends or at the end walls located there or axially between the rotor components, which makes implementation in existing systems easy.
- no additional axial installation space is required, as would be the case with additional screw connections.
- production can be simplified because the axial fit can be reduced if necessary depending on the means used. For example, even the smallest gaps in the axial direction between the rotor components may not be sufficient to reliably prevent relative movements. However, according to the invention, it is possible that even if there are small gaps axially between the rotor components, the relative movement can be reduced or prevented by the appropriate means.
- the at least one means may comprise hard particles for increasing the friction between at least two adjacent rotor components.
- a braking effect can be induced by increasing the friction between the rotor components at different rotation speeds. Therefore, the rotor components will rotate at a uniform speed or a relative movement can at least be significantly reduced. It has been shown that this is already sufficient to significantly prevent noise emissions as well as the occurrence of disturbing vibrations and thus improve the NVH behavior.
- hard particles can be understood as those which have a Vickers hardness [HV] of at least 800 HV 10, preferably of at least 1000 HV 10.
- HV Vickers hardness
- the Vickers hardness can preferably be determined according to ISO 6507.
- the at least one means can comprise a carrier designed as a disk body, arranged on the shaft and between two rotor components and provided with hard particles on at least one axial end wall.
- conventional rotor components can thus be used. All that is needed is a disk element between the rotor components, which is provided with hard particles on at least one axial end wall or preferably on both of its axial end walls.
- the provision of hard particles can be made possible, for example, by a coating in which hard particles are present.
- a matrix made of a resin for example, can be used as a coating in which hard particles are present.
- the hard particles expediently protrude from the matrix in order to come into contact with the adjacent rotor component and thus increase the friction during a relative movement.
- Alternative embodiments include, for example, a disk element formed from plastic, into which the hard particles can be introduced directly onto the surface, for example in a melted state of the disk element, in such a way that they protrude from the surface.
- the material of the disk element can be selected. For example, as described above, it can be selected from a plastic or from a metal or ceramic.
- the disk element like the rotor components, can be pressed onto the shaft.
- the at least one means comprises a surface arranged on the shaft and between two rotor components and coated with hard particles at least one axial end wall.
- the disk element essentially applies.
- the advantage of a textile material, such as a nonwoven material, as a carrier for the hard particles can have the advantage that the carrier is thinner than a solid disk element.
- weight can be saved compared to a disk element, which can be advantageous in particular in mobile applications.
- a possible negative influence on the performance of the electrical machine can be prevented in this way.
- the carrier for the hard particles can also be designed in a different way, so that as a basic design it is possible for the at least one means to comprise a carrier arranged on the shaft and between two rotor components and provided with hard particles on at least one axial end wall.
- the at least one means can comprise a coating comprising hard particles on at least one axial end wall of a rotor component.
- all axial end walls of a rotor component aligned with another rotor component can comprise a corresponding coating.
- an intermediate element such as the protruding disk element, can be dispensed with.
- the coating can in turn be applied as described above with reference to the disk element.
- a matrix comprising hard material particles for example in the form of a resin layer, can be applied to the corresponding axial surface or to the axial surfaces of the rotor component or the rotor components.
- the coating can be applied over the entire surface, i.e. on the entire axial end wall of the rotor component.
- the coating it is also possible for the coating to be applied only partially, i.e. locally.
- the hard particles are selected from boron nitride particles, diamond particles, silicon carbide particles. It has been shown that the particles described above in particular have advantageous properties in the application described. In particular, a relative movement between adjacent rotor components can be achieved using the The particles described above can be particularly effectively prevented or reduced, and the particles are also very stable over the long term.
- the at least one means comprises a tensioning means for increasing the contact tension of adjacent rotor components.
- a tensioning of the rotor components in the axial direction takes place in such a way that a relative movement can be effectively reduced or prevented.
- This design can be achieved, for example, by providing axially outwardly curved formations, such as embossed areas, which can increase the local contact stress and improve elasticity.
- the same can be made possible, for example, by reworking the rotor components in such a way that an axially outwardly curved elevation is formed locally.
- an existing follow-up process can be used, for example.
- the permanent magnets can be introduced into a rotor stack by caulking or by overmolding with plastic. The follow-up processes can then be specifically designed to create axial elevations that lead to locally increased contact stresses.
- At least one means comprises an axial material connection between at least two adjacent rotor components.
- An axial material connection is understood to mean a connection that is formed on opposite axial end walls of adjacent rotor components. This design can be achieved, for example, by welding or gluing the adjacent rotor components together at their axial end surfaces facing each other. Welding or gluing can be carried out over the entire surface or in certain locally limited areas. For example, spot welding or spot gluing can be used for a material connection between adjacent rotor components.
- Such an electrical machine can be used in particular to drive a vehicle, such as a motor vehicle.
- a vehicle such as a motor vehicle.
- An electrically powered vehicle can generally be understood as a purely electrically powered vehicle or a hybrid vehicle.
- a vehicle can also be understood as a motor vehicle.
- the electric machine can be designed in a manner known per se and have the above-described rotor and a corresponding actuator, which can drive the rotor in a manner known per se or set it in rotation.
- the electric motor can be adapted to the selected area of application, for example the type of vehicle that is to be driven by the electric motor.
- the electric machine has the advantage of reduced noise and/or vibration emissions and thus fundamentally improved NVH behavior.
- Fig. 1 shows a schematic view of a rotor according to an embodiment of the present invention
- Fig. 2 shows an embodiment of a rotor component for the rotor of Figure 1;
- FIG. 3 shows an embodiment of a carrier for hard particles for a rotor according to Figure 1 .
- Figure 1 shows a rotor 10 according to an embodiment of the present invention.
- the rotor 10 is designed for use in an electrical machine and has a shaft 12 on which a plurality of rotor components 16 are arranged, in particular pressed on.
- the rotor components 16 are positioned axially adjacent to one another, although a small gap 18 can still be provided between the rotor components 16, which is shown greatly enlarged in Figure 1 for clarity.
- at least one means 20 is provided for preventing or reducing a relative movement between at least two adjacent rotor components 16. Exemplary means 20 are described in detail below.
- Figure 2 shows a rotor component 16. This has an axial end wall 22, which is arranged at an axial end of the rotor component 16 and runs in a radial plane. A receptacle 24 is also shown, which serves to hold the shaft 12 or with which the rotor component 16 can be pressed onto the shaft 12. Hard particles 26, which can serve as means 20, are shown on the end wall 22 and optionally on the axially opposite end wall. The hard particles 26 can, for example, be applied in a coating or can also be introduced directly into the end wall 22. In the rotor according to Figure 1, the hard particles 26 can come into contact with an adjacent rotor component 16 and thus reduce or prevent a relative movement between two rotor components 16.
- tensioning means are provided to increase the contact tension of adjacent rotor components 16. These can be designed, for example, as embossed elements that project axially outwards.
- a carrier 28 which can be arranged in a gap 18 and thus between two rotor components 16 and can be in contact with them.
- the carrier 28 has an end wall 30 running in a radial plane and also an axially opposite end wall, which point outwards in the axial direction.
- one or both end walls 30 can be provided with hard particles 26, which can serve as means 20.
- the hard particles 26 can, for example, be in a coating applied or also introduced directly into the end wall 30.
- the hard particles 26 can come into contact with an adjacent rotor component 16 and thus reduce or prevent a relative movement between two rotor components 16.
- the carrier 28 can be designed, for example, as a rigid disc element 14 or as a textile carrier 28.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24739453.9A EP4740291A1 (de) | 2023-07-07 | 2024-07-01 | Vibrationsreduzierung durch verhinderung von radialem verschieben von rotormodulen |
| CN202480044831.0A CN121488390A (zh) | 2023-07-07 | 2024-07-01 | 通过防止转子模块径向位移减少振动 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023206494.4A DE102023206494A1 (de) | 2023-07-07 | 2023-07-07 | Rotor für eine elektrische Maschine |
| DE102023206494.4 | 2023-07-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025012003A1 true WO2025012003A1 (de) | 2025-01-16 |
Family
ID=87760117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/068464 Ceased WO2025012003A1 (de) | 2023-07-07 | 2024-07-01 | Vibrationsreduzierung durch verhinderung von radialem verschieben von rotormodulen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4740291A1 (de) |
| CN (1) | CN121488390A (de) |
| DE (1) | DE102023206494A1 (de) |
| WO (1) | WO2025012003A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112012001550T5 (de) * | 2011-04-02 | 2014-01-02 | Nidec Corp. | Rotoreinheit, sich drehende elektrische Maschine und Verfahren zum Herstellen einer Rotoreinheit |
| WO2014166674A2 (de) * | 2013-04-11 | 2014-10-16 | Siemens Aktiengesellschaft | Reluktanzmotor und zugehöriger rotor |
| EP2761725B1 (de) * | 2011-09-26 | 2019-05-29 | Radial Flux Laboratories Pty Ltd | Elektrische permanentmagnetmaschine |
| DE102020203487A1 (de) * | 2020-03-18 | 2021-09-23 | Mahle International Gmbh | Rotor eines Elektromotors |
| WO2022139500A1 (ko) * | 2020-12-23 | 2022-06-30 | 엘지마그나 이파워트레인 주식회사 | 모터 |
-
2023
- 2023-07-07 DE DE102023206494.4A patent/DE102023206494A1/de active Pending
-
2024
- 2024-07-01 EP EP24739453.9A patent/EP4740291A1/de active Pending
- 2024-07-01 WO PCT/EP2024/068464 patent/WO2025012003A1/de not_active Ceased
- 2024-07-01 CN CN202480044831.0A patent/CN121488390A/zh active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112012001550T5 (de) * | 2011-04-02 | 2014-01-02 | Nidec Corp. | Rotoreinheit, sich drehende elektrische Maschine und Verfahren zum Herstellen einer Rotoreinheit |
| EP2761725B1 (de) * | 2011-09-26 | 2019-05-29 | Radial Flux Laboratories Pty Ltd | Elektrische permanentmagnetmaschine |
| WO2014166674A2 (de) * | 2013-04-11 | 2014-10-16 | Siemens Aktiengesellschaft | Reluktanzmotor und zugehöriger rotor |
| DE102020203487A1 (de) * | 2020-03-18 | 2021-09-23 | Mahle International Gmbh | Rotor eines Elektromotors |
| WO2022139500A1 (ko) * | 2020-12-23 | 2022-06-30 | 엘지마그나 이파워트레인 주식회사 | 모터 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023206494A1 (de) | 2023-09-14 |
| EP4740291A1 (de) | 2026-05-13 |
| CN121488390A (zh) | 2026-02-06 |
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