EP4018530A1 - Verfahren zur herstellung eines rotors für eine elektrische maschine sowie entsprechender rotor und entsprechende elektrische maschine - Google Patents
Verfahren zur herstellung eines rotors für eine elektrische maschine sowie entsprechender rotor und entsprechende elektrische maschineInfo
- Publication number
- EP4018530A1 EP4018530A1 EP20750586.8A EP20750586A EP4018530A1 EP 4018530 A1 EP4018530 A1 EP 4018530A1 EP 20750586 A EP20750586 A EP 20750586A EP 4018530 A1 EP4018530 A1 EP 4018530A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- base body
- rotor shaft
- permanent magnet
- cavity
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 16
- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 238000005304 joining Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 239000011343 solid material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
Classifications
-
- 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
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- 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
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- 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
- H02K21/02—Details
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
Definitions
- the invention relates to a method for manufacturing a rotor for an electrical machine, in particular a permanently excited synchronous machine, the rotor comprising the following components: (i) an axially extending rotor shaft, (ii) a ferromagnetic base body mounted on the rotor shaft or a series of the rotor shaft axially successively mounted ferromagnetic base bodies, (iii) a disk element mounted on the rotor shaft, which axially adjoins the base body or one of the base bodies, and (iv) at least one permanent magnet, at least one cavity being formed in the at least one base body and wherein the at least one permanent magnet is arranged in the at least one cavity and is glued there.
- the invention also relates to a corresponding rotor and a corresponding electrical machine.
- Permanent magnet synchronous machines are used in many industrial applications and increasingly also in automotive applications.
- the laminated rotor stacks built therein are usually preassembled.
- the magnets are joined and glued in the laminated rotor stacks.
- the rotor lamination stacks are finally pressed onto the rotor shaft as components that can be installed.
- the permanent magnets and their adhesives experience high loads over their lifetime due to the high speed / performance requirements.
- the adhesive must be applied evenly to the adhesion surfaces between the rotor core and the magnet in order to fix the magnet over its service life. During assembly, it can happen that the adhesive does not completely penetrate into the adhesive gap or, in the opposite case, emerges again on the opposite side of the laminated rotor core. An unwanted leakage of the adhesive must be avoided at all costs.
- the document DE 102008 027 758 A1 describes a method for producing a rotor for a dynamoelectric machine, the rotor comprising the following components: (i) an axially extending rotor shaft, (ii) a ferromagnetic base body in the form of a rotor shaft a laminated core, (iii) two disc elements mounted on the rotor shaft, each axially attached to the base body on one side and (iv) several permanent magnets, with several cavities called magnet pockets being formed in the base body and with the permanent magnets arranged in the cavities and are shed there.
- the disk elements have distribution channels for a corresponding casting compound with knockout openings to the outside. After the permanent magnets have been placed in the magnet pockets, they are added to disk elements and the laminated core and disk elements are fixed with bolts.
- At least one permanent magnet wherein at least one cavity is formed in the at least one base body and wherein the at least one permanent magnet is in the at least one cavity is arranged and glued there, it is provided that the disc element is mounted on the rotor shaft via a joining process and - in the case of several base bodies successively - the respective base body is mounted on the rotor shaft by the joining process and the at least one assigned to it only after the corresponding base body has been installed Permanent magnet in the at least one cavity of this montier th base body is arranged and glued there. In this way, the min least one permanent magnet can be glued cleanly and permanently.
- the disk element seals the corresponding side of the axially adjacent base body from the outside in a fluid-tight manner with respect to the adhesive used solely because of its disk-shaped basic shape. Axially adjacent base bodies are mounted on the rotor shaft in a fluid-tight manner with respect to the adhesive used.
- the joining of the base body of the at least one of the base bodies onto the rotor shaft is pressing and / or shrinking onto the rotor shaft.
- a press connection is created between the rotor shaft and the other rotor components mentioned.
- the base body for the shrink-fitting is heated to a maximum temperature that is above a critical temperature of the at least one permanent magnet and / or a critical temperature of the adhesive used for gluing the at least one permanent magnet lies.
- shrinking is only possible, please include since it is first shrunk onto the shaft and then glued. There is a particularly large excess.
- the joining of the disk element onto the rotor shaft is pressing and / or shrinking.
- the at least one base body can be formed from solid material. According to a further preferred embodiment of the invention, however, the at least one base body is formed by a laminated core with a plurality of laminations.
- the disk element is designed as a balancing disk.
- the disk element has at least one balancing element for balancing the rotor.
- a permanent-magnet synchronous machine which comprises the following components:
- At least one permanent magnet wherein at least one cavity is formed in the at least one base body and wherein the at least one permanent magnet is arranged in the at least one cavity and glued there, it is provided that the disk element is a disk element mounted on the rotor shaft by the joining process , the at least one base body is a base body mounted on the rotor shaft by a joining process and the at least one permanent magnet is only glued into the at least one cavity of this mounted base body after the respective base body has been installed.
- the disk element is formed as a cover which seals the corresponding side of the axially adjacent base body in a fluid-tight manner with respect to the adhesive used.
- the disk element has neither distribution channels nor a break-out opening to the outside. Axially adjacent base bodies are then mounted on the rotor shaft in a fluid-tight manner with respect to the adhesive used.
- the disk element is a disk element pressed and / or shrunk onto the rotor shaft and / or that b) at least one of the base bodies is a base body pressed and / or shrunk onto the rotor shaft.
- the at least one base body can be formed from solid material. According to a further preferred embodiment of the invention, however, the at least one base body is formed by a laminated core with a plurality of metal sheets.
- the disk element is designed as a balancing disk (or more specifically as a balancing plate).
- the disk element has at least one balancing element for balancing the rotor.
- Fig. 1 a rotor for an electrical machine, which is carried out according to a preferred embodiment of the invention.
- Fig. 1 shows a rotor 10 for an electrical machine.
- the electrical machine for which this type of rotor 10 is intended is a permanent magnet synchronous machine (PSM).
- the rotor 10 comprises the following components: first as the base of the rotor 10, a rotor shaft 14 that extends axially with respect to a longitudinal axis 12 of the rotor 10, then a disk element 16 mounted on the rotor shaft 14, which in the example shown is a balancing disk 18 / forms.
- a number of ferromagnetic base bodies 20 mounted axially directly one after the other on the rotor shaft 14, the first base body of this series being axially directly adjacent to the disk element 16.
- Each of the ferromagnetic base bodies 20 of the rotor 10 is designed as a laminated core 22 with a plurality of laminations (not shown in detail) stacked on one another. Both the disk element 16 and each of the ferromagnetic base bodies 20 of the rotor 10 are joined to the rotor shaft 14, more precisely joined by an interference fit (interference fit). As a rule, the corresponding parts 16, 20 are pressed and / or shrunk onto the rotor shaft 14.
- the disk element 16 is first mounted on the rotor shaft 14 via a joining process and the respective base body 20 is successively mounted on the rotor shaft 14 via a joining process. Only after the assembly of the corresponding base body 20 are the associated permanent magnets arranged in the cavities 24 of this assembled base body 20 and glued there. On In this way, the permanent magnets 24 can be glued cleanly and permanently to whoever. Additional components or structures for filling in glue are not required.
- the joining of the disk element 16 as well as the base body 20 to the rotor shaft 14 is here a pressing and / or shrinking onto the rotor shaft 14.
- Permanent magnet 26 and glue fitted If there is an oversize for positioning the laminated cores 22 to the rotor shaft 14, the non-glued and not preassembled laminated cores 22 can be heated to a greater extent since the maximum permissible rotor temperature is usually limited by the permanent magnets 26 and the adhesive. This allows larger oversizes to be realized and implemented.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019122507.8A DE102019122507A1 (de) | 2019-08-21 | 2019-08-21 | Verfahren zur Herstellung eines Rotors für eine elektrische Maschine sowie entsprechender Rotor und entsprechende elektrische Maschine |
| PCT/DE2020/100640 WO2021032239A1 (de) | 2019-08-21 | 2020-07-22 | Verfahren zur herstellung eines rotors für eine elektrische maschine sowie entsprechender rotor und entsprechende elektrische maschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4018530A1 true EP4018530A1 (de) | 2022-06-29 |
Family
ID=71943902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20750586.8A Withdrawn EP4018530A1 (de) | 2019-08-21 | 2020-07-22 | Verfahren zur herstellung eines rotors für eine elektrische maschine sowie entsprechender rotor und entsprechende elektrische maschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220337138A1 (de) |
| EP (1) | EP4018530A1 (de) |
| CN (1) | CN114258625A (de) |
| DE (1) | DE102019122507A1 (de) |
| WO (1) | WO2021032239A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201116109D0 (en) * | 2011-09-18 | 2011-11-02 | Univ City | Flywheel assembly |
| DE102021112815A1 (de) | 2021-05-18 | 2022-11-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Rotor mit einer Rotationsachse für eine elektrische Antriebsmaschine |
| JP1719215S (ja) * | 2021-12-22 | 2022-07-07 | 電動機 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5864191A (en) * | 1992-08-12 | 1999-01-26 | Seiko Epson Corporation | Efficient permanent magnet rotor for brushless motor |
| JP3309393B2 (ja) * | 1994-06-01 | 2002-07-29 | セイコーエプソン株式会社 | 永久磁石回転子 |
| US6047460A (en) * | 1996-01-23 | 2000-04-11 | Seiko Epson Corporation | Method of producing a permanent magnet rotor |
| JP5956277B2 (ja) * | 2012-08-07 | 2016-07-27 | 山洋電気株式会社 | 永久磁石式モータ、および永久磁石式モータの製造方法 |
-
2019
- 2019-08-21 DE DE102019122507.8A patent/DE102019122507A1/de not_active Withdrawn
-
2020
- 2020-07-22 CN CN202080059107.7A patent/CN114258625A/zh not_active Withdrawn
- 2020-07-22 EP EP20750586.8A patent/EP4018530A1/de not_active Withdrawn
- 2020-07-22 WO PCT/DE2020/100640 patent/WO2021032239A1/de not_active Ceased
- 2020-07-22 US US17/636,051 patent/US20220337138A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019122507A1 (de) | 2021-02-25 |
| CN114258625A (zh) | 2022-03-29 |
| US20220337138A1 (en) | 2022-10-20 |
| WO2021032239A1 (de) | 2021-02-25 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20220321 |
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| AK | Designated contracting states |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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| 18W | Application withdrawn |
Effective date: 20220927 |
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| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |