EP3408922A1 - Befestigung eines permanentmagnets innerhalb eines rotorblechpakets - Google Patents
Befestigung eines permanentmagnets innerhalb eines rotorblechpaketsInfo
- Publication number
- EP3408922A1 EP3408922A1 EP17702583.0A EP17702583A EP3408922A1 EP 3408922 A1 EP3408922 A1 EP 3408922A1 EP 17702583 A EP17702583 A EP 17702583A EP 3408922 A1 EP3408922 A1 EP 3408922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composite component
- connecting element
- laminated core
- rotor
- permanent magnet
- 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- Withdrawn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
- H02K1/27—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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods 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
- 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
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
Definitions
- An internal permanent magnet electric machine generally includes a rotor having a plurality of alternating polarity permanent magnets around an outer periphery of a rotor lamination stack of the rotor.
- the rotor is rotatable within a stator, which generally includes a plurality of windings and magnetic poles of alternating polarity.
- the configuration of permanent magnets in electric machines with internal permanent magnets is radially symmetric, i. it shows a symmetry with respect to an origin.
- such electrical machines can produce unwanted torque ripple, which can lead to unwanted vibration and noise.
- the permanent magnets in the rotor lamination stack are chamfered to reduce the torque ripple. This can be done, for example, such that the permanent magnets are placed at an axial angle relative to each other or the permanent magnets are rotated stepwise.
- Such skewing is a proven technique used to reduce harmonics, cogging torque, Torqeripple and noise.
- a continuous or a stepwise restriction can be provided.
- first stacked core packages are fitted with permanent magnets in the rotor structure.
- the respective laminated core stacks are packetized or assembled at an axial angle relative to one another relative to the complete rotor laminated core.
- the permanent magnets are inserted in grooves provided for you and either clamped by additional elements or glued in the slot openings.
- gluing is the predominant technology, which, however, does not require elaborate techniques in assembly and recycling, such as separating the permanent magnets from the engine components.
- the use of adhesive also causes a considerable effort that must be met depending on the adhesive used ent ⁇ speaking safety regulations because of possibly evaporating solvent or the like. Regardless of the type of electrical machine is still particularly in the case of buried permanent magnets due to the large forces and moments occurring, eg. As the Zentrifu ⁇ galkraft and the starting torques, the attachment of Perma ⁇ nentmagnete of enormous importance.
- Fixation or attachment of the permanent magnets are ensured within the rotor core even at high dynamic load. Furthermore, it should be possible to simplify the recycling of rare earths from electrical machines.
- the composite component according to the invention for fastening a permanent magnet within a rotor laminated core of an electric machine comprises a permanent magnet, which is fastened within a connecting element of thermoplastic material, wherein the connecting element has an outer fixing structure for fastening the connecting element within a receptacle of the rotor lamination.
- the permanent magnet can be particularly securely clamped within the Ver ⁇ binding element. Within the Verbin ⁇ -making elements of the permanent magnet is also particularly reliably protected against damage. By enclosing the permanent magnet within the connecting element, the risk can be further reduced that possibly splintered magnetic parts get into the electrical machine. Furthermore, tolerances of the magnet geometry can be compensated by the connecting element. In addition, a recycling of the permanent magnets can be improved by, for example, allows the permanent magnets taken out from the connecting elements and the plastic of the connecting elements will be ⁇ melted.
- thermoplastics offer the advantage that the weight of the parts can be reduced while at the same time ensuring low distortion and high dimensional stability.
- the composite component with a connecting element made of a thermoplastic material at high continuous service temperature and simultaneous high mechanical stress on a high temperature resistance. Furthermore, it is particularly resistant to many chemicals, mineral oils and fuels.
- additives can be used to influence the thermal and electrical conductivity.
- the composite component can be introduced with its fixing structure, which is preferably designed elastically, in the receptacle of the rotor core. The recordings will be ⁇ vorzugt of individual sheets forming the rotor laminated core, punched out. The punching creates a
- Cut surface which is rugged and may have gaps and / or burrs.
- the fixation structure may get caught in the gaps and / or burrs.
- a positive connection between the fixing structure and the receptacle of the rotor laminated core can be generated.
- With appropriate dimensioning of the outer dimensions of the composite component and the recordings of the rotor laminated core it is also possible to produce a frictional connection between the composite component and the receptacles of the rotor lamination stack, with the composite component being pressed into the receptacle with pressure.
- the composite component according to the invention can thus form a magnetic clip, which allows design advantages and savings in assembly.
- the permanent magnet is encapsulated by injection molding of thermoplastic material of the connection ⁇ elements.
- This embodiment allows a complete enclosure of the permanent magnet within the connecting element.
- the overmolding furthermore offers a high design freedom as well as a higher load capacity of the
- thermoplastics for encapsulating the permanent magnet also offers the advantage that the weight of the parts can be reduced while simultaneously providing low distortion and high dimensional stability.
- the permanent magnet is inserted into the connecting element.
- the connecting element can be, in particular ⁇ sondere be a hose-like hollow profile from thermoplastic material, preferably with a profiling on its outside.
- a semifinished product for example a rod material or an infinity profile can be used, which is brought to a desired level by separation methods. Subsequently, the permanent magnet can be inserted into the semi-finished product placed on the desired length.
- the fixing structure may include lamellas, bulbous transverse profiling, triangular cross-profiling, opposite to a mounting direction of the composite component within the rotor core packet sharply diverging transverse profiles, contrary to a mounting direction of the composite component within the rotor core packet conically diverging longitudinal profiles and / or convex side walls.
- Such elements allow a particularly secure form and / or adhesion between composite component and the rotor core.
- the connecting element is substantially cuboid, wherein the fixing structure is arranged on mutually opposite outer sides of the connecting element.
- This embodiment is particularly suitable for cuboid permanent magnets and is particularly material-saving in terms of the plastic of the connecting element in this context.
- the fixing structure may be circumferentially arranged on mutually opposite outer sides of the connecting element and on a further outer side, which is arranged between the opposite outer sides.
- An inventive rotor core for an electric machine comprises a composite part described above. Since a multiplicity of permanent magnets are typically accommodated within the rotor laminated core, the rotor laminated core can preferably have a plurality of receptacles for accommodating in each case one composite component according to the invention described above.
- An electric machine according to the invention comprises a pre- ⁇ described inventive rotor core, which is a part of a rotor of the electric machine.
- the inventive method for producing a Rotorb ⁇ leak package for an electrical machine comprising a plurality of permanent magnets providing ⁇ and a stacked Ro ⁇ torblechpers with receptacles for the permanent magnets.
- a Rotorb ⁇ leak package for an electrical machine comprising a plurality of permanent magnets providing ⁇ and a stacked Ro ⁇ torblechpers with receptacles for the permanent magnets.
- an attaching of the permanent magnets within Verbin ⁇ -making elements of thermoplastic material wherein the connecting elements each having a fixing structure for fixing the fasteners within the receivers of the Rotorb ⁇ leak package and wherein the permanent magnets are either overmolded with a thermoplastic material of the connecting element or plugged into the connecting elements ,
- a previously described OF INVENTION ⁇ dung according composite component is made with profiled surfaces and non-positively and positively in a korres ⁇ pondierende images of a rotor core packet or
- Single permanent magnets can be manufactured by overmolding with different properties and functions in a single operation.
- a composite component produced according to the method according to the invention is particularly well suited for tolerance compensation when the permanent magnet or the composite component is inserted into the receptacles of the rotor lamination stack. Further, chipping can be avoided or intrusion of chips into the electric machine can be avoided by a Elnhausen of the permanent magnet within the connection ⁇ elements.
- the method is also particularly well suited for automated assembly of permanent magnets in the corresponding recordings of the rotor laminated core but also for easy plug-in assembly. In addition, a particularly simple recycling is made possible by simply removing the composite component from the receptacles of the rotor laminated core and melting the plastic of the connecting element.
- the encapsulation of individual permanent magnets offers a particularly high process reliability compared to other joining methods such as adhesive bonding or clamping methods and can be done in semi or fully automated manufacturing cells.
- the production of the composite component by overmolding of metal parts with thermoplastic materials in fully automated manufacturing cells saves assembly costs and opens up design advantages.
- magnetic material ⁇ plastic compounds are very resilient, offer a high design freedom and can combine several functions in one component.
- a production of assemblies is possible, which can otherwise be built only over several individual joining operations, which cost savings are possible.
- a high degree of design freedom with additional functionality in the plastic encapsulation is made possible.
- with magnetic material-plastic composite parts during stress tests better results can be achieved than with other methods joined assemblies.
- secure embedding of magnetic Material components possible.
- greater process reliability over other joining methods such as gluing or clamping is possible.
- FIG. 1 is a partial perspective view of rotor laminated core with incorporated therein composite component
- Fig. 2 is a perspective view of the composite component according to
- FIG. 3 is a side sectional view of the composite component according to Fig.l without showing the rotor laminated core
- FIG. 1 is a side sectional view of the composite component of FIG. 1 within the rotor laminated core
- FIG. 5 is a partial side sectional view of the Rotorb ⁇ lech package of FIG. 1 with burrs shown for positive connection with the composite component
- Fig. 13 is a longitudinal sectional view of a hose-like
- FIG. 14 is an enlarged detail view of an outer Fi ⁇ xierUSD the hollow profile of FIG. 13th 1 to 4 show a composite component 1 for fastening a permanent magnet 2 within a rotor laminated core 3 of an electric machine, not shown.
- the permanent magnet 2 is fastened within a connecting element 4 made of plastic of the composite component 1, wherein the connecting element 4 an outer Fixier Modell 5 in the form of elastic lamellae 6 for fastening the connecting element 4 and thus also the entire composite component 1 within a receptacle 7 of the rotor lamination ⁇ package 3 having.
- the rotor laminated core 3 comprises still further of the receptacles 7 described above, within which - as likewise described above - further composite components 1 are attached.
- the connecting element 4 is substantially cuboid. In the example shown, it has a central cuboid center element 8, which surrounds the likewise cuboid permanent magnet 2. In the example shown, the permanent magnet 2 is encapsulated by thermoplastic material of the connecting element 4.
- the fixing structure 5 is arranged on mutually opposite outer sides 9 and 10 (FIG. 3) of the middle element 8 and equidistantly next to each other.
- the fins 6 are integrally connected to the central element 8 of the connecting element 4 and have a semicircular shape.
- Fig. 5 shows a part of a sheet 11 of the rotor laminated core 3.
- an opening 12 was punched, which connects opposite end faces Sl and S2 of the sheet metal 11 together.
- Several sheets 11 with such openings are stacked in a stacking direction L, so that the rotor core 3 is formed.
- the openings 12 of the respective plates 11 are arranged to one another such that in ⁇ nerrenz the rotor core packet 3, the receptacle 7 for encrypting connecting element 4 and thus also for the permanent magnet 3 is formed.
- a cut surface 13 is formed with a smooth cut portion 14 and a retraction height 15, wherein the respective opening 12 is partially rugged and in the example shown has a ridge 16 with a tearing depth 17.
- the fixing structure 5 can get caught in the ridge 16 or in the gap before and after the smooth cut portion 14. In this way, a positive connection between the receptacle 7 of the rotor laminated core 3 and the fixing structure 5 of the composite component 1 can be generated.
- the outer dimensions of the composite ⁇ component 1 and the apertures 12 and the receptacle 7 of the rotor core 3 are further dimensioned such that a frictional connection between the composite component 1 and the receptacle 7 of the rotor core 3 is generated, wherein the composite component 1 with pressure in the Recording 7 is pressed.
- FIG. 6 shows a further composite component 1, which differs from the composite component 1 shown by FIGS. 1 to 4 in that the fixing structure 4 has no lamellae 5, but a plurality of bulbous transverse profiling 18 arranged next to each other and equidistant from each other, thus providing a particularly secure positive locking Connection between the rotor core 3 and the composite component 1 is made possible.
- FIG. 7 shows a further composite component 1, which differs from the composite component 1 shown by FIGS. 1 to 4 in that the fixing structure 4 has no lamellae 5, but a plurality of triangular transverse profiling 19 arranged next to each other and equidistant from one another, as a result of which a particular ⁇ secure positive connection between the Ro ⁇ torblechumb 3 and the composite component 1 is made possible.
- 8 shows a further composite component 1, which differs from the composite component 1 shown by FIGS.
- the fixing structure 4 does not have lamellae 5 but, instead of a mounting direction M of the composite component 1 within the rotor lamination stack 3, cross-sectional profiles running apart 20, which can catch particularly well between the ridges 16 of the sheets 11 of the rotor lamination stack 3 (FIG.
- the transverse profilings can furthermore form barbs which can particularly reliably prevent the composite component 1 from moving out of the receptacle 4 of the rotor laminated core 3 out of the direction of assembly M.
- FIG. 9 shows a further composite component 1, which differs from the composite component 1 shown by FIGS. 1 to 4 in that the fixing structure 4 has no lamellae 5 but, instead of a mounting direction M of the composite component 1 within the rotor lamination stack 3, diverging conically Longitudinal profiling 21, which can be particularly well wedged within the receptacle 7 of the rotor core 3, whereby a particularly secure frictional connection between the
- Composite component 1 and the rotor core 3 can be made possible.
- FIGS. 1 to 4 shows a further composite component 1 which differs from the composite component 1 shown by FIGS. 1 to 4 in that the fixing structure 4 has no lamellae 5, but convex side walls 22, which are particularly well within the receptacle 7 of the rotor lamination stack 3 can wedge, creating a particularly secure non-positive connection between the composite component 1 and the rotor core 3 he ⁇ can be made possible.
- FIGS. 11 and 12 show a further composite component 1, which differs from the composite component 1 shown by FIGS. 1 to 4 differs that the fixing structure 5 is arranged with their lamellae 6 circumferentially on mutually opposite outer sides 9, 10 of the connecting element 4 and on a further outer side 23, which is arranged between the opposite outer sides 9, 10. Furthermore, the Perma ⁇ nentmagnet 2 is not overmolded with the thermoplastic material Ver ⁇ binding member 4 but inserted in an insertion direction E into a receptacle 24 of the connecting element. 4 13 and 14 illustrate a possible production of a connecting element 4 for a composite component 1 according to the invention.
- the connecting element 4 made of a tubular hollow profile 25 is made of thermoplastic material which is provided with a lamellar profiling 5 on its outside.
- For the hollow section 25 may in particular a
- FIG. 14 also shows a mounting direction M of the connecting element 4 of the composite component 1 within a rotor laminated core.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016201281.9A DE102016201281B3 (de) | 2016-01-28 | 2016-01-28 | Befestigung eines Permanentmagnets innerhalb eines Rotorblechpakets |
PCT/EP2017/051691 WO2017129704A1 (de) | 2016-01-28 | 2017-01-26 | Befestigung eines permanentmagnets innerhalb eines rotorblechpakets |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3408922A1 true EP3408922A1 (de) | 2018-12-05 |
Family
ID=57956270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17702583.0A Withdrawn EP3408922A1 (de) | 2016-01-28 | 2017-01-26 | Befestigung eines permanentmagnets innerhalb eines rotorblechpakets |
Country Status (5)
Country | Link |
---|---|
US (1) | US20210104923A1 (de) |
EP (1) | EP3408922A1 (de) |
CN (1) | CN108604841A (de) |
DE (1) | DE102016201281B3 (de) |
WO (1) | WO2017129704A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017211882A1 (de) * | 2017-07-12 | 2019-01-17 | Robert Bosch Gmbh | Klemmvorrichtung und Rotor für eine elektrische Maschine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4089341B2 (ja) * | 2002-04-16 | 2008-05-28 | 日立金属株式会社 | ロータおよび回転機 |
JP2005012859A (ja) * | 2003-06-16 | 2005-01-13 | Nissan Motor Co Ltd | 電動機回転子及びその製造方法 |
JP2006311782A (ja) * | 2005-03-30 | 2006-11-09 | Toyota Motor Corp | ロータおよびその製造方法 |
FI122122B (fi) * | 2007-12-11 | 2011-08-31 | Abb Oy | Kestomagneettiyksikkö sähkökoneeseen, menetelmä kestomagneettiyksiköiden asentamiseksi ja sähkökoneen roottori |
DE102007063307A1 (de) * | 2007-12-28 | 2009-07-02 | Robert Bosch Gmbh | Montageverfahren zum Einpassen eines Permanentmagneten in ein Halteelement |
ATE548790T1 (de) * | 2009-05-05 | 2012-03-15 | Iro Ab | Positionierungssubstrat und permanentmagnetrotor |
BR112013031443B1 (pt) * | 2011-06-09 | 2020-02-11 | Toyota Jidosha Kabushiki Kaisha | Rotor de máquina elétrica rotativa, máquina elétrica rotativa e método para produção de rotor de máquina elétrica rotativa |
JP2013123316A (ja) * | 2011-12-12 | 2013-06-20 | Nissan Motor Co Ltd | ロータコアおよびその製造方法 |
JP6136718B2 (ja) * | 2013-07-31 | 2017-05-31 | 日産自動車株式会社 | 回転電機用ロータとその製造方法 |
-
2016
- 2016-01-28 DE DE102016201281.9A patent/DE102016201281B3/de active Active
-
2017
- 2017-01-26 CN CN201780005998.6A patent/CN108604841A/zh active Pending
- 2017-01-26 EP EP17702583.0A patent/EP3408922A1/de not_active Withdrawn
- 2017-01-26 US US16/072,840 patent/US20210104923A1/en not_active Abandoned
- 2017-01-26 WO PCT/EP2017/051691 patent/WO2017129704A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
DE102016201281B3 (de) | 2017-05-24 |
WO2017129704A1 (de) | 2017-08-03 |
CN108604841A (zh) | 2018-09-28 |
US20210104923A1 (en) | 2021-04-08 |
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