EP3476023A1 - Rotor for an electrical rotating machine - Google Patents
Rotor for an electrical rotating machineInfo
- Publication number
- EP3476023A1 EP3476023A1 EP17749379.8A EP17749379A EP3476023A1 EP 3476023 A1 EP3476023 A1 EP 3476023A1 EP 17749379 A EP17749379 A EP 17749379A EP 3476023 A1 EP3476023 A1 EP 3476023A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- shaft
- laminated
- clamping element
- laminated cores
- 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- Withdrawn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
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
- 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]
-
- 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
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- 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
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
- B63H2005/1254—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis
- B63H2005/1258—Podded azimuthing thrusters, i.e. podded thruster units arranged inboard for rotation about vertical axis with electric power transmission to propellers, i.e. with integrated electric propeller motors
-
- 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
Definitions
- a rotor for a rotating electrical machine The invention relates to a rotor for an electric ro ⁇ animal machine, especially a synchronous machine, wel ⁇ cher a rotatable around a rotation axis shaft and a plurality of laminated cores having disposed circumferentially around the shaft, wherein between the Wave and the
- Each of the sheet metal ⁇ packets includes partial sheet metal tendons, which extend in the axial direction one behind the other. Furthermore, the invention relates to an electric rotating machine, in particular a synchronous machine having at least one such rotor.
- the invention relates to a nacelle drive with at least one such electrical rotating machine.
- the invention relates to a ship with at least one such gondola drive.
- a ship with at least one such gondola drive Such an electric rotating machine, beispielswei ⁇ se a motor or a generator, is used in particular in the
- the electric rotating machine is in particular designed as a synchronous machine and has a stator and a rotor rotatable about a rotation axis with a shaft and at least one laminated core.
- the ⁇ least to a sheet package comprises a plurality of poles which game carried out at ⁇ as electromagnets, and in particular with coils or permanent magnets.
- the Blechpa ⁇ ket of the rotor is attached to the shaft without it, even in a short circuit case, comes to a contact between the rotor and the stator.
- the machine is modularly constructed and can be scaled in size and power by adding or removing, for example, identical, active parts.
- the patent document DE 657 790 C discloses a fastening ei ⁇ nes laminated core in the housing a large electric Rotie ⁇ leaders machine ⁇ be strengthened in particular in a concrete foundation.
- the electrical rotating machine includes supporting prisms on the laminated core which are buildin ⁇ Untitled to housing cheeks.
- the housing walls carrying the prisms are made yielding.
- the patent EP 1756928 Bl discloses a Synchronmo- tor with a rotor, on which magnets by clamping elements are ⁇ be strengthened, whereby the clamping elements consist on the rotor and Zvi ⁇ rule arranged the magnets webs. Grooves are introduced into the webs, that they on the one facing at least from ⁇ cut-wise expansion of the webs enable the rotor off side.
- the published patent application DE 10329651 Al discloses a Li ⁇ near motor with polygonal cross-section comprising a primary part with a plurality of polygon-like arranged plate stacks and rotating winding coils.
- the laminated cores are modularly assembled to primary parts of different numbers of laminated cores to easily produce different engines of different performance. These linear motors are characterized by high thrust in a short design.
- the published patent EP 3 001 542 A1 describes a per ⁇ manenterregten rotor for an electrical machine, which a stator, a rotor, and an air gap disposed between the rotor and the stator.
- the rotor has a rotor body which is provided for rotation about a central axis of rotation and further comprises permanent magnets which are inserted into a magnetic material.
- the permanent magnets have an inner end and an outer end, wherein the outer end of the permanent magnets in the vicinity of the air gap at the periphery of the air gap defining rotor is arranged. At least a portion of the outer end of the permanent magnets is not ⁇ be covered by the magnetic material.
- the invention has for its object to provide a rotor, in particular ⁇ special for a synchronous machine, which has a high smoothness.
- a rotor for an electric rotating machine in particular a synchronous ⁇ machine, which one about an axis of rotation
- each of the laminated cores comprises Operablechpakte which extend in the axial direction one behind the other, wherein at least between two adjacent partial laminated cores of a laminated core, a clamping element is arranged, wherein between the clamping element and at least one of the adjacent partial ⁇ stacks a frictional connection is formed, wherein at least a part of the clamping element has a variable Di ⁇ bridge, which increases toward the shaft, wherein the part ⁇ sheet packets are clamped by the variable thickness of the clamping element obliquely to the axis of rotation.
- the object is achieved by an elec tric ⁇ rotating machine, especially a synchronous machine, which has at least such a rotor on ⁇ . Furthermore, the object is achieved by a gondola ⁇ drive with at least one such electric rotating machine. In addition, the object is achieved by a ship with at least one such gondola drive.
- the invention is based on the idea of specifying a rotor which is scalable in terms of power and size, in particular for a synchronous machine, which has a high degree of smoothness.
- a sheet package meh ⁇ eral laminate stack comprises, arranged in axial direction behind each other ⁇ on the shaft.
- the partial laminated cores have, for example, permanent magnets or are suitable for being wound with a coil.
- the partial sheet ⁇ packets are at least in the radial direction positively connected to the shaft.
- Such a radially effective form-locking connection is realized, for example, by the partial laminated cores are ge ⁇ pushed in the axial direction of the shaft.
- the frictional connection leads to a fixation of the laminated core on the shaft and prevents, in particular in centrifugal forces occurring during operation, a rattling of the partial laminated cores in the groove, which has a positive effect on the smoothness of the rotor.
- At least part of the clamping element has a variable Di ⁇ bridge.
- the thickness of the Klemmele ⁇ ment increases in the radial direction to the shaft. Due to the variable thickness, the partial laminated core can be easily clamped and thus fi xed ⁇ .
- the clamping element is designed as an element separate from the shaft.
- Ver ⁇ use of a separate component, the shaft can be scaled easily and inexpensively.
- the use of a separate component more freedom in the design of the clamping element.
- a different material may be used for the clamping element than for the shaft in order to optimize the electrical or mechanical properties of the rotor.
- the clamping element is designed as a wedge plate.
- a wedge plate is a longitudinally profiled sheet whose thickness changes, at least in part.
- Such thickness Variegated ⁇ tion in the production of the wedge plate is achieved, for example, by a continuous adjustment of the nips during a material passing through a rolling stand.
- the thickness of the wedge plate to the shaft to back, so that the laminated-core assemblies are clamped by a pressure oblique to the Ro ⁇ tationsachse.
- Such wedge plates are ro ⁇ bust and easy to manufacture.
- the clamping element is designed as a spring plate.
- the partial laminated cores heat up during operation and thereby expand.
- the spring plate is formed substantially Y-shaped.
- the Y-shape allows a spring effect to compensate for thermal expansion easily and reliably implemented.
- the clamping element is formed from a non-magnetic material.
- be ⁇ is the clamping element consists of a spring steel which in comparison to other steels, a higher strength and a higher elastic limit.
- the spring steel has an elastic limit of at least 1000 N / mm 2 . Since the Ab ⁇ was located between the sub-sheet stacks, in particular in the millimeter range, that affects non-magnetic material of the clamping element, the electromagnetic properties of the
- the shaft is formed of a weichmagneti ⁇ rule material.
- a ⁇ style material in view of the electromagnetic properties of the rotor, proved to be particularly advantageous.
- an axially extending guide groove or guide rail for the radial fixation of the partial laminated cores of at least ei ⁇ nen laminated core is provided.
- a guide or guide rail is milled example meadow in the shaft. Since no additional fasteners, such as screws or bolts, which may possibly solve, to form the positive connection between the shaft and the laminated cores are required, such a positive connection is reliable and easy to manufacture.
- the guide groove is formed as a hammerhead or dovetail groove.
- a ham ⁇ merkopfnut or dovetail groove is a groove with a proven and reliable profiling to form a positive connection.
- at least one of the two adjacent partial laminated cores has a recess for receiving at least a part of the clamping element.
- the off ⁇ saving is executed in particular corresponding to the shape of the clamping element.
- the partial laminated cores preferably have permanent magnets. By such a rotor architecture, the permanent magnets, according to mechanical and electrical requirements, can be arranged with little effort on the rotor. In particular ⁇ sondere scaling of the rotor with respect to the pole pairs is paid easily and cost-effectively.
- cooling passages run through the partial laminated cores for a coolant, where ⁇ the clamping element is dimensioned for an unimpeded flow of the coolant between the adjacent partial laminated cores.
- At least one axi ⁇ alen end of the at least one laminated core a motifele ⁇ ment to limit the at least one laminated core angeord ⁇ net.
- a terminating element fixes the partial sheet packets in the axial direction, in particular resiliently.
- a detachable closing element the partial laminated cores can be easily and quickly maintained and replaced.
- a positive connection is advantageous because the connection is reliable and non-destructive solvable.
- the closing element is detachably connected to the shaft ver ⁇ prevented.
- the closing element is designed as a sheet or a bolt.
- the sheet is bolted to the shaft.
- a sheet metal or a bolt are reliable and simple connecting elements which ensure high serviceability of the laminated core.
- FIG. 1 shows a three-dimensional sectional view of a first
- Rotor an enlarged longitudinal section of the first embodiment of a rotor of Figure 1 in the region of two adjacent partial laminated cores, a longitudinal section of a second embodiment egg nes rotor, a three-dimensional representation of a Klemmele ⁇ management,
- FIG. 6 shows a three-dimensional detail of the second embodiment of a rotor in the region of a Blechpa ⁇ kets
- 7 shows an enlarged cross section of a third embodiment of a rotor in the region of a laminated core
- FIG. 9 shows a ship with a nacelle drive.
- the rotor 1 shows a three-dimensional sectional view of a first embodiment of a rotor 2.
- the rotor 2 which is suitable for an electric rotating machine with a maximum power of at least one megawatt and has a diameter of at least 1 meter, has a shaft 4, which Executed hollow shaft and is rotatable about a rotation axis 6.
- the axis of rotation defines an Axialrich ⁇ tung A, a radial direction R, and circumferential direction U.
- To the shaft 4 are laminated cores 8 with an axial length of at least 2 meters, in particular rotationally symmetrically, distributed, comprising a plurality of laminated-core assemblies 10th
- the part ⁇ laminated cores 10 are arranged one behind another in the axial direction A on the shaft.
- the partial laminated cores 10 each comprise at least one permanent magnet 12, but may also be suitable for being wrapped by a coil.
- the partial laminated cores 10 are successively maro ⁇ ben over radially distributed on the circumference guide grooves 14 on the shaft 4 which is formed between the partial laminated cores 10 of the respective laminated core 8 and the corresponding guide groove 14 acting in the radial direction R form-locking connection.
- the shaft 4 has a bearing 16 on a drive side AS and on a non-drive side BS.
- the laminated core 8 includes, by way of example, four partial laminated cores 10. Between each two adjacent partial laminated cores 10, a respective clamping element 18 is arranged, which is designed as a wedge plate 20. leads and, for example, from a weichmagentician Me ⁇ tall, especially steel exists. But the wedge plates 20 may also consist of an amagnetic material. The thickness d of a part of the wedge plates 20 increases linearly in the area of the shaft 4.
- the partial laminated cores 10 have 20 corresponding recesses 21 to the shape of the wedge plates.
- wedge plate 20 with non-linear enlargement of the thickness d and / or increase in the thickness d over the entire radial length and / or one-sided enlargement of the thickness d of the wedge plate 20 are possible and counter ⁇ stand of the invention. Due to the variable thickness of the wedge plate 20, a frictional connection is formed between the wedge plate 20 and the adjacent partial laminated cores 10. A terminator is respectively at the axial ends of the laminated core 8-circuit element 22 for limiting the laminated core 8 angeord ⁇ net, wherein the end members 22 are made as a bolt 24 and are bolted to the shaft. 4 By Ab ⁇ closing elements 22, the partial laminated cores 10 of the Blechpa ⁇ kets 8 are fixed in a form-fitting manner in the axial direction.
- the further embodiment of the rotor 2 corresponds to that in FIG. 1
- FIG. 3 shows an enlarged longitudinal section of the first embodiment of a rotor 2 in the region of two adjacent partial laminated cores 10.
- the partial laminated cores 10 comprise permanent magnets 12 and a stack of electrical sheets 26, which are held together by pressure plates 28 arranged on both sides and clamping bolts 30 extending through the partial laminated core 10.
- clamping elements 18, which are configured as wedge plates 20, are located between the adjacent partial laminated cores 10.
- FIG. 4 shows a longitudinal section of a second embodiment of a rotor 2.
- the end elements 22 at the axial ends of the laminated core 8 are designed as plates 34 and screwed to the shaft 4.
- the spring plate 36 is formed in a substantially Y-shaped and ensures that the laminated-core assemblies 10 of the respective laminated core 8 are GeSI chert resiliently, whereby for example in a thermal From ⁇ stretch the bias voltage is regulated by the spring plates 36th
- the designed as a spring plate 36 clamping element 18 be ⁇ is made of an amagnetic material, in particular spring ⁇ steel. Since the sheet thickness of the spring plate 36 is rich in the millimeter that affects non-magnetic material of the clamping elements 18 ⁇ the electromagnetic properties of the laminated core 8 does not appreciably.
- cooling channels 38 for a coolant wherein the designed as a spring plate 36 Klemmele ⁇ ment 18 is dimensioned for an unimpeded flow of the coolant between the adjacent partial laminated cores 10.
- the cooling channels 38 extend above the spring plate 36 and / or the spring plate 36 has recesses, which allow unhindered coolant flow.
- the further from ⁇ leadership of the rotor 2 corresponds to that in FIG. 2
- FIG. 5 shows a three-dimensional representation of a Klemmele ⁇ element 18, which is designed as a spring plate 36. Due to the substantially Y-shaped configuration, an elastic clamping of the partial laminated cores 10 in the guide groove 14 he ⁇ allows, for example, whereby a thermal expansion is compensated by a change in the bias of the spring plates 36.
- FIG. 6 shows a three-dimensional section of the second embodiment of a rotor 2 in the area of a sheet stack 8.
- the guide groove 14 is
- the guide groove 14 is
- Hammerkopfnut 40 which forms by a profiling 42 arranged on both sides with the partial laminated cores 10 acting in the radial direction R form-fitting connection.
- the guide groove 14 can for example, be designed as a dovetail groove. Cooling channels 38 extend through the partial laminated cores 10 above the spring plate.
- the further embodiment of the rotor 2 ent ⁇ speaks in FIG. 4
- FIG. 7 shows an enlarged cross-section of a third embodiment of a rotor 2 in the region of a laminated core 8.
- a form-locking connection between the shaft 4 and the laminated core 8 acting in the radial direction R is formed via a guide rail 43, the guide rail 43 being in the form of a dovetail.
- the guide rail 43 may be designed to form a positive connection between the shaft 4 and the laminated core 8 also different, for example, hammerhead-shaped.
- the further embodiment of the rotor 2 corresponds to that in FIG.
- FIG. 8 shows an electric rotating machine 3, which is designed as a synchronous machine 44, with a rotor 2 and egg ⁇ nem surrounding the rotor 2 stator 46. Between the rotor 2 and the stator 46 is a gap 48, in particular an air gap.
- the rotor 2 of the electric rotating machine 3 has laminated cores 8 with permanent magnets 12, wherein the laminated cores 8 directly adjoin the gap 48.
- the laminated cores 8 In the middle of the laminated cores 8 there is at least one coolant opening 50 in the shaft 4, through which a coolant is passed.
- the coolant flow 52 extends from the coolant opening 50 through cooling channels 38 in the partial laminated cores 10 and through the gap 48 to the winding heads 54 of the stator 46.
- the further embodiment of the rotor 2 corresponds to that in FIG. 4.
- FIG. 9 shows a ship 54 with a nacelle drive 56.
- the nacelle drive 56 is located below a water surface 58 and has an electric rotating machine 3 and a propeller 60, the propeller 60 being connected to the electric rotating machine 3 via a shaft 4.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16188758.3A EP3297129A1 (en) | 2016-09-14 | 2016-09-14 | Rotor for an electric rotating machine |
PCT/EP2017/068007 WO2018050318A1 (en) | 2016-09-14 | 2017-07-17 | Rotor for an electrical rotating machine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3476023A1 true EP3476023A1 (en) | 2019-05-01 |
Family
ID=56926104
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16188758.3A Withdrawn EP3297129A1 (en) | 2016-09-14 | 2016-09-14 | Rotor for an electric rotating machine |
EP17749379.8A Withdrawn EP3476023A1 (en) | 2016-09-14 | 2017-07-17 | Rotor for an electrical rotating machine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16188758.3A Withdrawn EP3297129A1 (en) | 2016-09-14 | 2016-09-14 | Rotor for an electric rotating machine |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP3297129A1 (en) |
KR (1) | KR102067406B1 (en) |
WO (1) | WO2018050318A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020028185A (en) * | 2018-08-10 | 2020-02-20 | Tdk株式会社 | Magnet structure, manufacturing method of magnet structure, and manufacturing method of rotating electric machine |
EP3629446A1 (en) * | 2018-09-26 | 2020-04-01 | Siemens Aktiengesellschaft | Rotor for a rotating electric machine with improved cooling and magnetic flux |
DE102021210755A1 (en) * | 2021-09-27 | 2023-03-30 | Siemens Energy Global GmbH & Co. KG | Rotor for electric rotating machine, electric rotating machine, nacelle propulsion and watercraft |
DE102021210756A1 (en) | 2021-09-27 | 2023-03-30 | Siemens Energy Global GmbH & Co. KG | Rotor for electric rotating machine, electric rotating machine, nacelle propulsion and watercraft |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE657790C (en) | 1935-04-07 | 1938-03-12 | Aeg | Fixing of the laminated core in the housing of large electrical machines |
DE10329651A1 (en) | 2003-07-01 | 2005-02-10 | Siemens Ag | Polygonal design of a linear motor with ring winding |
DE102004027036A1 (en) | 2004-06-02 | 2005-12-22 | Etel S.A. | synchronous motor |
EP3001542B1 (en) * | 2014-09-26 | 2020-03-11 | GE Renewable Technologies Wind B.V. | Permanent magnet rotors |
CN204179781U (en) * | 2014-11-19 | 2015-02-25 | 新疆金风科技股份有限公司 | Magnetic pole module and rotor |
-
2016
- 2016-09-14 EP EP16188758.3A patent/EP3297129A1/en not_active Withdrawn
-
2017
- 2017-07-17 WO PCT/EP2017/068007 patent/WO2018050318A1/en unknown
- 2017-07-17 KR KR1020197010156A patent/KR102067406B1/en active IP Right Grant
- 2017-07-17 EP EP17749379.8A patent/EP3476023A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2018050318A1 (en) | 2018-03-22 |
EP3297129A1 (en) | 2018-03-21 |
KR102067406B1 (en) | 2020-01-17 |
KR20190040369A (en) | 2019-04-17 |
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