EP3827503A1 - Rotor, elektromotor, verfahren zur herstellung eines rotors sowie verwendung eines rotors bzw. elektromotors - Google Patents
Rotor, elektromotor, verfahren zur herstellung eines rotors sowie verwendung eines rotors bzw. elektromotorsInfo
- Publication number
- EP3827503A1 EP3827503A1 EP19742735.4A EP19742735A EP3827503A1 EP 3827503 A1 EP3827503 A1 EP 3827503A1 EP 19742735 A EP19742735 A EP 19742735A EP 3827503 A1 EP3827503 A1 EP 3827503A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- shaft
- recesses
- electric motor
- opening
- 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
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/104—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting only by friction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
Definitions
- the present invention relates to a rotor according to the preamble of claim 1, an electric motor according to the preamble of claim 9, a method for producing a rotor according to the preamble of claim 10, and use of a rotor according to the preamble of claim 11, 12 or 15 ,
- a rotor comprising a shaft and a rotor assembly attached to the shaft, is mostly used in electric motors.
- the rotor package is usually a laminated core composed of individual laminations.
- the individual sheet metal lamellae are arranged one behind the other in the axial direction.
- the laminations as such can also be composed of individual laminated segments which are arranged and connected one behind the other in the circumferential direction.
- the rotor package is non-rotatably connected to the shaft. As a rule, this is done using a press network.
- a rotor package with an internal thread has become known, which is screwed onto a shaft provided with an external thread.
- this measure can be used to improve the connection between the shaft and the rotor assembly, there is still a need for an improved rotor, in particular a connection between the shaft and the rotor assembly, which represents a secure connection even at high speeds.
- the rotor should also be easy to manufacture.
- this object is achieved by a rotor with the characterizing features of claim 1. Due to the fact that the shaft is a hollow shaft with a wall, the wall of the shaft on its side facing the opening being provided with recesses running in the longitudinal direction, the circumferential rigidity can be reduced.
- the shaft acts as a compressed spring and can follow the pre-compressed path when the rotor assembly is expanded. Due to the centrifugal forces also acting on the shaft (albeit lower centrifugal forces than with the rotor package), the shaft is also expanded beyond the normal diameter.
- the recesses are aligned parallel to the longitudinal axis of the shaft and / or parallel to one another.
- the recess is designed as an elongated hole in the wall of the hollow shaft.
- the design of the recess as an elongated hole can advantageously be produced in terms of production technology, for example by milling the elongated hole out of the wall of a hollow shaft.
- other manufacturing processes are also conceivable.
- the elongated hole extends over a section of the shaft, in particular over a section which is received in the opening of the rotor assembly.
- the recess is designed as a groove.
- the configuration of the recess as a groove differs from the configuration as an elongated hole essentially in that the groove has a groove bottom.
- Such a structure can preferably by profiling the wall of the Hollow shaft can be made.
- the wall preferably has a constant wall thickness.
- the shaft is equipped with contact surfaces which abut the inner surface of the opening, the recesses being arranged between the contact surfaces.
- the shaft is formed from a soft magnetic material.
- the rotor package has cutouts, in particular triangular cutouts, which in particular directly adjoin the cutouts, so that the cutouts and cutouts together form a continuous flow barrier.
- cutouts in particular triangular cutouts, which in particular directly adjoin the cutouts, so that the cutouts and cutouts together form a continuous flow barrier.
- Another object of the present invention is to propose an improved electric motor.
- this object is achieved by an electric motor with the characterizing features of claim 9. Because the rotor is a rotor proposed according to the invention, an improved connection between the shaft and the rotor assembly can be provided, which can ensure a reliable connection between the shaft and the rotor assembly even at high speeds.
- Another object of the present invention is to propose an advantageous production method for a rotor according to the invention.
- this object is achieved by a method having the characterizing features of claim 10.
- the recess or the recesses is produced by material-separating processes, in particular milling or punching, or shaping processes, in particular pressing or hammering, depending on which Embodiment is selected for the recess or the recesses, the recesses are made in a manner that is advantageous in terms of production technology.
- Another object of the present invention is to propose an advantageous use of a rotor according to the invention, in particular an electric motor according to the invention with a rotor according to the invention.
- this object is achieved by use with the characterizing features of claim 11. Because the shaft acts as a compressed spring, the shaft can follow the pre-compressed path when the rotor package is expanded.
- Another object of the present invention is to propose an advantageous use of a rotor according to the invention, in particular an electric motor according to the invention with a rotor according to the invention.
- the shaft serves to guide a magnetic flux
- the recesses being used as flow barriers for guiding this magnetic flux
- the recesses can have a multiple function accordingly, in particular as a function of an improved connection between the shaft and the rotor package, and also as flow barriers for steering of a magnetic field.
- the recesses in the shaft can be designed as a groove or as an elongated hole.
- the shaft is also made of soft magnetic material, so that the shaft serves as a magnetic conductor, in particular for the magnetic short-circuiting of two poles of two magnets of a rotor package having magnets. This can save material in the rotor, in particular for reducing the rotor yoke.
- the rotor assembly preferably has further flow barriers in the form of cutouts, in particular essentially triangular cutouts. These cutouts directly adjoin the cutouts, so that the cutouts and cutouts each form a coherent flow barrier. This can further save material in the rotor package.
- Another object of the present invention is to propose an advantageous use of a rotor according to the invention, in particular an electric motor according to the invention with a rotor according to the invention.
- this object is achieved by use according to the characterizing features of claim 15.
- Effective cooling of the rotor can be carried out by applying a cooling medium to the recesses.
- the recesses can be assigned the functions already outlined above, so that, for example, three functions are combined in one recess, which in turn can contribute to a compact construction of the rotor or electric motor.
- FIG. 1 shows an electric motor according to the invention with a rotor according to the invention in a schematic cross-sectional illustration
- FIG. 2a shows a shaft of a rotor according to the invention in a perspective view
- FIG. 2b shows a shaft of a rotor according to the invention in a top view
- FIG. 3 shows a rotor according to the invention in a perspective view
- FIG. 4 shows a rotor according to the invention in a front view
- FIG. 5 shows an exemplary comparison of the transmissible torque as a function of the rotational speed for different rotor packet / shaft constellations
- FIG. 6a shows a further embodiment of a shaft for a rotor according to the invention in a first perspective illustration
- FIG. 6b shows an embodiment of a shaft according to FIG. 6a for an inventive one
- FIG. 7 shows a rotor according to the invention with a shaft according to FIGS. 6a and 6b in a perspective illustration
- FIG. 8 shows a schematic illustration of magnetic flux lines in a rotor according to the invention
- FIG. 9 shows a schematic illustration of magnetic flux lines in a rotor according to the invention.
- a rotor R according to the invention essentially comprises a shaft 1 and a rotor package 2.
- the rotor assembly 2 is twisted, but preferably also axially fixed, attached to the shaft 1.
- the shaft 1 is a hollow shaft with a corresponding wall 11.
- the shaft 1 has a corresponding longitudinal axis or axis of rotation L.
- the rotor assembly 2 has at least one, preferably a plurality of annular sheet-metal laminations 21, which are assembled to form a hollow cylindrical rotor assembly 2.
- the lamellae 21 are lined up one behind the other in the axial direction.
- the sheet metal lamellae 21 as such can be composed of individual sheet metal lamella segments (not shown) which are arranged and connected one behind the other in the circumferential direction.
- the rotor assembly 2 has an opening 22 through which the shaft 1 is inserted or in which the shaft 1 is received.
- This opening 22 has a surface facing the shaft, which is referred to below as the inner surface.
- the shaft 1 or its wall 11 has a surface facing the opening 22.
- the surface of the shaft 1 facing the inner surface of the opening 22 is provided with recesses 12 running in the longitudinal direction L.
- the recesses 12 are preferably aligned parallel to the longitudinal axis L of the shaft 1 and / or parallel to one another.
- the recesses 12 can be designed as elongated holes in the wall 11 of the hollow shaft.
- the elongated hole 12 preferably penetrates the wall 11 completely and is preferably produced by material-separating processes, such as milling or punching.
- the recesses 12 of this embodiment preferably do not extend over the entire length of the shaft 1, but generally over the part of the shaft 1 which is located in the opening 22 of the rotor assembly 2.
- the elongated holes 12 are open on one side. All openings on one side of the elongated holes can be arranged on one side of the shaft 1, but also alternately or alternately in a pattern with respect to the side of the shaft 1.
- the wall 11 can be designed in a profiled manner, ie the recesses 12 are designed as grooves.
- the groove 12 accordingly has a groove bottom, ie, in contrast to the elongated holes, the groove 12 does not completely penetrate the wall 11.
- the groove or the profile is preferably produced by means of reshaping processes, such as presses.
- a rotor shaft 1 with reduced circumferential rigidity is proposed, onto which a rotor package 2 is pressed directly.
- the circumferential rigidity can be reduced by means of recesses 12, for example in the form of elongated holes and / or grooves.
- the number I refers to an unprofiled hollow shaft, the number II to a hollow shaft with four grooves as recesses and the number III to a hollow shaft with eight grooves as recesses (Fig. 2 to 4).
- the recesses 12 can at the same time be used as flow barriers for guiding a magnetic field, particularly in synchronous or hybrid synchronous machines.
- the shaft 1 is made of soft magnetic material, so that a magnetic path leads through one or more elevations 13 of the shaft. As a result, the shaft short-circuits two poles of two magnets 16.
- material in the rotor package 2 can be saved.
- the rotor package has further flow barriers in the form of cutouts 15, here essentially triangular cutouts 15. These cutouts 15 directly adjoin the cutouts 12, so that the cutouts 12 and cutouts 15 together form a continuous flow barrier 4. As a result, the magnetic material can be used more effectively and material in the rotor assembly 2 can be saved. In particular are magnetically weakly used areas are cut out radially below magnets 16, so that the weight of the rotor can be reduced.
- the recesses 12 can also serve as channels for a cooling medium which can come into direct contact with the rotor assembly.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018212431.0A DE102018212431A1 (de) | 2018-07-25 | 2018-07-25 | Rotor, Elektromotor, Verfahren zur Herstellung eines Rotors sowie Verwendung eines Rotors bzw. Elektromotors |
PCT/EP2019/069549 WO2020020787A1 (de) | 2018-07-25 | 2019-07-19 | Rotor, elektromotor, verfahren zur herstellung eines rotors sowie verwendung eines rotors bzw. elektromotors |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3827503A1 true EP3827503A1 (de) | 2021-06-02 |
Family
ID=67402935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19742735.4A Pending EP3827503A1 (de) | 2018-07-25 | 2019-07-19 | Rotor, elektromotor, verfahren zur herstellung eines rotors sowie verwendung eines rotors bzw. elektromotors |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210273510A1 (de) |
EP (1) | EP3827503A1 (de) |
CN (1) | CN112470366A (de) |
DE (1) | DE102018212431A1 (de) |
WO (1) | WO2020020787A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020200549A1 (de) | 2020-01-17 | 2021-07-22 | Mahle International Gmbh | Rotorwelle eines Elektromotors |
DE102020215933A1 (de) * | 2020-12-15 | 2022-06-15 | Thyssenkrupp Steel Europe Ag | Gewichtsoptimierte Rotorwelle und Verfahren zu seiner Herstellung |
WO2022189091A1 (de) * | 2021-03-10 | 2022-09-15 | Magna powertrain gmbh & co kg | Rotor für eine elektrische maschine |
DE102022200604A1 (de) | 2022-01-20 | 2023-07-20 | Mahle International Gmbh | Rotor für einen Elektromotor |
DE102022207569B4 (de) * | 2022-07-25 | 2024-02-08 | Magna powertrain gmbh & co kg | Rotor mit einem Kühlmittelkanal für eine elektrische Maschine |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3997803A (en) * | 1974-08-01 | 1976-12-14 | Westinghouse Electric Corporation | Rotor member for dynamoelectric machines with longitudinal passages of decreasing area communicating with radial core vents |
JPS62198834U (de) * | 1986-06-04 | 1987-12-17 | ||
DE4018959C2 (de) * | 1989-06-14 | 1994-05-19 | Mitsuba Electric Mfg Co | Verfahren zur Herstellung einer Verbindung zwischen einer Nabe und einer Welle |
DE102009054995A1 (de) * | 2009-12-18 | 2011-06-22 | Robert Bosch GmbH, 70469 | Rotor für eine Elektromaschine |
DE102011006280A1 (de) * | 2011-03-29 | 2012-10-04 | Zf Friedrichshafen Ag | Elektrische Maschine mit einer einen Rotor tragenden Rotorwelle |
JP2013183480A (ja) * | 2012-02-29 | 2013-09-12 | Toyota Motor Corp | 回転電機用ロータの冷却構造、および、回転電機 |
NO334163B1 (no) * | 2012-03-30 | 2013-12-23 | Techni Holding As | Torsjonskompensator |
JP2014057456A (ja) * | 2012-09-13 | 2014-03-27 | Aisin Seiki Co Ltd | 電動モータのロータ |
DE102014216905A1 (de) * | 2014-08-26 | 2016-03-03 | Robert Bosch Gmbh | Rotorkörper zur Anordnung an einem Rotor sowie Rotoranordnung |
DE102015213609A1 (de) * | 2015-07-20 | 2017-01-26 | Siemens Aktiengesellschaft | Hochdynamisch betreibbarer Rotor für eine elektrische Maschine |
JP6455725B2 (ja) * | 2015-11-03 | 2019-01-23 | 株式会社デンソー | 回転電機 |
DE102016118026B4 (de) * | 2016-09-23 | 2022-01-27 | Hirschvogel Umformtechnik Gmbh | Rotor, insbesondere Rotor für eine elektrische Maschine, elektrische Maschine und Verfahren zur Herstellung eines Rotors |
CN206023489U (zh) * | 2016-09-28 | 2017-03-15 | 李明晨 | 空心轴散热内转子电机和外转子电机 |
-
2018
- 2018-07-25 DE DE102018212431.0A patent/DE102018212431A1/de active Pending
-
2019
- 2019-07-19 EP EP19742735.4A patent/EP3827503A1/de active Pending
- 2019-07-19 US US17/261,225 patent/US20210273510A1/en active Pending
- 2019-07-19 CN CN201980048818.1A patent/CN112470366A/zh active Pending
- 2019-07-19 WO PCT/EP2019/069549 patent/WO2020020787A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2020020787A1 (de) | 2020-01-30 |
DE102018212431A1 (de) | 2020-01-30 |
US20210273510A1 (en) | 2021-09-02 |
CN112470366A (zh) | 2021-03-09 |
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