WO2014082840A2 - A spoke permanent magnet rotor - Google Patents

A spoke permanent magnet rotor Download PDF

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Publication number
WO2014082840A2
WO2014082840A2 PCT/EP2013/073415 EP2013073415W WO2014082840A2 WO 2014082840 A2 WO2014082840 A2 WO 2014082840A2 EP 2013073415 W EP2013073415 W EP 2013073415W WO 2014082840 A2 WO2014082840 A2 WO 2014082840A2
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
core
rotor
slot
air gap
Prior art date
Application number
PCT/EP2013/073415
Other languages
French (fr)
Other versions
WO2014082840A3 (en
Inventor
Cihad Ekin
Emin Gultekin SONMEZ
Yakup Imat
Mahmut HIMYERI
Original Assignee
Arcelik Anonim Sirketi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to KR1020157013369A priority Critical patent/KR20150077468A/en
Priority to CN201380062496.9A priority patent/CN105009416A/en
Priority to EP13789772.4A priority patent/EP2926436A2/en
Priority to US14/648,858 priority patent/US10177616B2/en
Publication of WO2014082840A2 publication Critical patent/WO2014082840A2/en
Publication of WO2014082840A3 publication Critical patent/WO2014082840A3/en

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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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets

Definitions

  • the present invention relates to a spoke permanent magnet rotor used in brushless direct current motors.
  • Spoke-type rotors comprise more than one magnet placed between the pole segments forming the rotor core and the magnets extend in the radial direction around the rotor shaft towards the outer periphery of the rotor core.
  • the magnets are tangentially magnetized with respect to their thickness and the magnetic flux generated by the magnets is collected on the pole pieces between which the magnets are placed.
  • the magnetic flux density in the air gap between the stator and rotor in other words the amount of the useful flux that provides the rotation of the rotor at the desired speed and torque is increased as compared to other magnet rotors.
  • the mechanical structure of the core is weakened and the resistance of the rotor to centrifugal forces decreases due to the magnets extending from the center outwards in the radial direction and which are positioned close to each other.
  • the aim of the present invention is the realization of a spoke-type permanent magnet rotor wherein the resistance thereof to centrifugal forces is increased.
  • the spoke-type rotor realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, forming the rotating portion in the stator in a brushless direct current motor and having an air gap between the stator and itself, comprises a ferromagnetic core, a shaft forming the rotational axis thereof, a hub bearing the shaft at the center of the core, pole segments disposed around the hub, magnets placed in the magnet slots between the pole segments, end rings produced from non-magnetic materials such as plastic or aluminum and covered on the front and rear surfaces of the core by the injection molding method, and magnet holding protrusions extending right and left from the pole segments over the magnet slots.
  • slot orifices that narrow from the magnet slots towards the air gap in the radial direction between the magnet holding protrusions.
  • a cage structure composed of bars extending in the axial direction is obtained around the core by injecting a non-magnetic material, for example plastic, into the slot orifices.
  • the bars injected into the slot orifices have naturally the same narrowing cross-sections as the slot orifices.
  • the bars are squeezed between the magnet holding protrusions inside the slot orifices, increasing the resistance to centrifugal forces.
  • the edges of the narrowing slot orifices are Y-shaped.
  • the edges of the slot orifices are convex or concave, facilitating the injection of the bars into the slot orifices, thus the bars are filled into the slot orifices without leaving any gaps.
  • Figure 1 – is the schematic view of an electric motor.
  • Figure 2 – is the perspective view of a spoke rotor.
  • Figure 3 – is the exploded view of a spoke rotor.
  • Figure 4 – is the longitudinal cross-sectional view of a spoke rotor.
  • Figure 5 – is the transversal cross-sectional view of a spoke rotor.
  • Figure 6 – is the front view of a spoke rotor core.
  • Figure 7 — is the view of detail D in Figure 6.
  • Figure 8 — is the view of the magnet slot orifice of the spoke rotor in an embodiment of the present invention.
  • Figure 9 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
  • Figure 10 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
  • Figure 11 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
  • Figure 12 – is the view of cross-section A – A in Figure 3.
  • the spoke-type permanent magnet rotor (1) used in the brushless direct current electric motors (13) driving the components like drum, circulation pump and discharge pump in household appliances like laundry washing and/or drying machine and dishwasher, forming the rotating part inside a stator (14) that forms the stationary part thereof and having an air gap (15) between the inner surface of the stator (14) and itself, comprises a cylindrical core (2) produced from ferromagnetic laminations or ferromagnetic powder metal, a shaft (3) that is fixed to the core (2) and forming the rotational axis of the rotor (1), a hub (5) disposed at the center of the core (2) and having a shaft hole (4) that bears the shaft (3), more than one pole segment (6) disposed all around the hub (5), more than one magnet slot (7) disposed between the pole segments (6), more than one magnet (8) tangentially magnetized, placed in the magnet slots (7) and extending outwards in the radial direction, two end rings (9) produced from non-magnetic materials such as plastic or aluminum, fixed on the front
  • the rotor (1) of the present invention comprises more than one slot orifice (11) situated between the magnet holding protrusions (10) and narrowing from the magnet slot (7) towards the air gap (15) in the radial direction, and more than one bar (12) produced by injecting non-magnetic material such as plastic into the slot orifices (11), extending along the core (2) in the axial direction between the end rings (9) and forming a cage that surrounds the core (2) between the magnet slots (7) and the air gap (15) ( Figure 6, Figure 7, Figure 8, Figure 12).
  • the cross-sections of the bars (12) have the same narrowing form as the slot orifice (11).
  • the all around cage structure formed by the bars (12) hold together the pole segments (6) and the magnets (8) in a rigid structure, increases the resistance to centrifugal forces, decreases the noise level of the motor (13) and prevents overheating.
  • the inner surfaces facing each other of the magnet holding protrusions (10) are produced in opposite angles so as to get closer to each other from the magnet (8) towards the air gap (15), and thus the narrowing form of the slot orifice (11) is obtained.
  • the cross-sections of the bars (12), formed by injecting non-magnetic material into the slot orifices (11) during the production of the end rings (9), are naturally in a form narrowing outwards in the radial direction.
  • the bars (12) having the same form as the narrowing slot orifices (11) and filling therein are squeezed between the inner surfaces of the magnet holding protrusions (10) with opposite angles and increase the resistance to centrifugal forces when the magnets (8) are forced to move outwards in the radial direction with the effect of the centrifugal force.
  • the slot orifices (11) are Y-shaped.
  • the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifices (11) are produced angularly so as to get closer to each other at the magnet (8) side and in parallel at the air gap (15) side ( Figure 9).
  • the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifice (11) are concave.
  • the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifice (11) are convex.
  • the curved edges of the slot orifice (11) facilitate the injection of non-magnetic material into the slot orifice (11) during the injection molding process.
  • the bars (12) are injected into the slot orifices (11) without leaving any gaps, the cage structure formed by the bars (12) around the core (2) is strengthened and the mechanical resistance of the rotor (1) is increased.
  • the slot orifices (11), narrowing from magnet slots (7) towards the air gap (15) around the core (2) and wherein a non-magnetic material is injected, increase the resistance to centrifugal forces and strengthen the mechanical structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The present invention relates to a spoke-type permanent magnet rotor (1) used in brushless direct current electric motors (13), forming the rotating part inside the stator (14) that forms the stationary part thereof and having an air gap (15) between the inner surface of the stator (14) and itself, comprising a cylindrical core (2) produced from ferromagnetic laminations or ferromagnetic powder metal, a shaft (3) fixed to the core (2) and forming the rotational axis of the rotor (1 ), a hub (5) disposed at the center of the core (2) and having a shaft hole (4) that bears the shaft (3), more than one pole segment (6) disposed all around the hub (5), more than one magnet slot (7) disposed between the pole segments (6), more than one magnet (8) tangentially magnetized, placed in the magnet slots (7) and extending outwards in the radial direction, and two end rings (9) produced from non-magnetic materials such as plastic and aluminum and fixed on the front and rear planar surfaces of the core (2) by the injection molding method.

Description

A SPOKE PERMANENT MAGNET ROTOR
The present invention relates to a spoke permanent magnet rotor used in brushless direct current motors.
The developments and regulations in the field of energy efficiency have increased the demand for high-efficiency electric motors. Spoke-type rotors comprise more than one magnet placed between the pole segments forming the rotor core and the magnets extend in the radial direction around the rotor shaft towards the outer periphery of the rotor core. The magnets are tangentially magnetized with respect to their thickness and the magnetic flux generated by the magnets is collected on the pole pieces between which the magnets are placed. In spoke-type rotors, the magnetic flux density in the air gap between the stator and rotor, in other words the amount of the useful flux that provides the rotation of the rotor at the desired speed and torque is increased as compared to other magnet rotors. Despite the said advantages of spoke-type rotors, the mechanical structure of the core is weakened and the resistance of the rotor to centrifugal forces decreases due to the magnets extending from the center outwards in the radial direction and which are positioned close to each other.
In the United States Patent Application No. US2007085437, a spoke permanent magnet rotor used in electric motors and the production method thereof are explained.
The aim of the present invention is the realization of a spoke-type permanent magnet rotor wherein the resistance thereof to centrifugal forces is increased.
The spoke-type rotor realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, forming the rotating portion in the stator in a brushless direct current motor and having an air gap between the stator and itself, comprises a ferromagnetic core, a shaft forming the rotational axis thereof, a hub bearing the shaft at the center of the core, pole segments disposed around the hub, magnets placed in the magnet slots between the pole segments, end rings produced from non-magnetic materials such as plastic or aluminum and covered on the front and rear surfaces of the core by the injection molding method, and magnet holding protrusions extending right and left from the pole segments over the magnet slots. In the rotor of the present invention, there are slot orifices that narrow from the magnet slots towards the air gap in the radial direction between the magnet holding protrusions. A cage structure composed of bars extending in the axial direction is obtained around the core by injecting a non-magnetic material, for example plastic, into the slot orifices. The bars injected into the slot orifices have naturally the same narrowing cross-sections as the slot orifices.
When the magnets are forced to move outwards in the radial direction during the high speed movement of the rotor, the bars are squeezed between the magnet holding protrusions inside the slot orifices, increasing the resistance to centrifugal forces. In an embodiment of the present invention, the edges of the narrowing slot orifices are Y-shaped.
In other embodiments of the present invention, the edges of the slot orifices are convex or concave, facilitating the injection of the bars into the slot orifices, thus the bars are filled into the slot orifices without leaving any gaps.
The rotor realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the schematic view of an electric motor.
Figure 2 – is the perspective view of a spoke rotor.
Figure 3 – is the exploded view of a spoke rotor.
Figure 4 – is the longitudinal cross-sectional view of a spoke rotor.
Figure 5 – is the transversal cross-sectional view of a spoke rotor.
Figure 6 – is the front view of a spoke rotor core.
Figure 7 – is the view of detail D in Figure 6.
Figure 8 – is the view of the magnet slot orifice of the spoke rotor in an embodiment of the present invention.
Figure 9 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
Figure 10 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
Figure 11 – is the view of the magnet slot orifice of the spoke rotor in another embodiment of the present invention.
Figure 12 – is the view of cross-section A – A in Figure 3.
The elements illustrated in the figures are numbered as follows:
  1. Rotor
  2. Core
  3. Shaft
  4. Shaft hole
  5. Hub
  6. Pole segment
  7. Magnet slot
  8. Magnet
  9. End ring
  10. Magnet holding protrusion
  11. Slot orifice
  12. Bar
  13. Motor
  14. Stator
  15. Air gap
The spoke-type permanent magnet rotor (1) used in the brushless direct current electric motors (13) driving the components like drum, circulation pump and discharge pump in household appliances like laundry washing and/or drying machine and dishwasher, forming the rotating part inside a stator (14) that forms the stationary part thereof and having an air gap (15) between the inner surface of the stator (14) and itself, comprises a cylindrical core (2) produced from ferromagnetic laminations or ferromagnetic powder metal, a shaft (3) that is fixed to the core (2) and forming the rotational axis of the rotor (1), a hub (5) disposed at the center of the core (2) and having a shaft hole (4) that bears the shaft (3), more than one pole segment (6) disposed all around the hub (5), more than one magnet slot (7) disposed between the pole segments (6), more than one magnet (8) tangentially magnetized, placed in the magnet slots (7) and extending outwards in the radial direction, two end rings (9) produced from non-magnetic materials such as plastic or aluminum, fixed on the front and rear planar surfaces of the core (2) by the injection molding method and providing the balance of the rotor (1), and more than one magnet holding protrusion (10) extending from each pole segment (6) over the magnet slots (7) between the magnet (8) and the air gap (15) and preventing the magnets (8) from dislodging from the magnet slots (7) with the effect of the centrifugal force.
The rotor (1) of the present invention comprises more than one slot orifice (11) situated between the magnet holding protrusions (10) and narrowing from the magnet slot (7) towards the air gap (15) in the radial direction, and more than one bar (12) produced by injecting non-magnetic material such as plastic into the slot orifices (11), extending along the core (2) in the axial direction between the end rings (9) and forming a cage that surrounds the core (2) between the magnet slots (7) and the air gap (15) (Figure 6, Figure 7, Figure 8, Figure 12). The cross-sections of the bars (12) have the same narrowing form as the slot orifice (11). The all around cage structure formed by the bars (12) hold together the pole segments (6) and the magnets (8) in a rigid structure, increases the resistance to centrifugal forces, decreases the noise level of the motor (13) and prevents overheating.
In the rotor (1) of the present invention, the inner surfaces facing each other of the magnet holding protrusions (10) are produced in opposite angles so as to get closer to each other from the magnet (8) towards the air gap (15), and thus the narrowing form of the slot orifice (11) is obtained. The cross-sections of the bars (12), formed by injecting non-magnetic material into the slot orifices (11) during the production of the end rings (9), are naturally in a form narrowing outwards in the radial direction. The bars (12) having the same form as the narrowing slot orifices (11) and filling therein are squeezed between the inner surfaces of the magnet holding protrusions (10) with opposite angles and increase the resistance to centrifugal forces when the magnets (8) are forced to move outwards in the radial direction with the effect of the centrifugal force.
In another embodiment of the present invention, the slot orifices (11) are Y-shaped. In this embodiment, the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifices (11) are produced angularly so as to get closer to each other at the magnet (8) side and in parallel at the air gap (15) side (Figure 9).
In another embodiment of the present invention, the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifice (11) are concave.
In another embodiment of the present invention, the surfaces facing each other of the magnet holding protrusions (10) that limit the slot orifice (11) are convex.
In the above-mentioned two embodiments, the curved edges of the slot orifice (11) facilitate the injection of non-magnetic material into the slot orifice (11) during the injection molding process. The bars (12) are injected into the slot orifices (11) without leaving any gaps, the cage structure formed by the bars (12) around the core (2) is strengthened and the mechanical resistance of the rotor (1) is increased.
In the rotor (1) of the present invention, the slot orifices (11), narrowing from magnet slots (7) towards the air gap (15) around the core (2) and wherein a non-magnetic material is injected, increase the resistance to centrifugal forces and strengthen the mechanical structure.

Claims (4)

  1. The spoke-type permanent magnet rotor (1) forming the rotating part of an electric motor (13) inside a stator (14) and having an air gap (15) between the inner surface of the stator (14) and itself, comprising a cylindrical ferromagnetic core (2), a shaft (3) forming the rotational axis thereof, a hub (5) disposed at the center of the core (2) and having a shaft hole (4) that bears the shaft (3), more than one pole segment (6) disposed all around the hub (5), more than one magnet slot (7) disposed between the pole segments (6), more than one magnet (8) placed in the magnet slots (7) and extending outwards in the radial direction, two end rings (9) produced from non-magnetic materials and fixed on the front and rear planar surfaces of the core (2) by the injection molding method, and more than one magnet holding protrusion (10) extending from each pole segment (6) over the magnet slots (7) between the magnet (8) and the air gap (15), characterized in that more than one slot orifice (11) situated between the magnet holding protrusions (10) and narrowing from the magnet slot (7) towards the air gap (15) in the radial direction, and more than one bar (12) produced by injecting non-magnetic material into the slot orifices (11), extending along the core (2) in the axial direction between the end rings (9) and surrounding the core (2) between the magnet slots (7) and the air gap (15).
  2. A rotor (1) as in Claim 1, characterized in that the magnet holding protrusions (10) that limit the slot orifices (11), angularly positioned so as to get closer to each other at the magnet (8) side and in parallel at the air gap (15) side.
  3. A rotor (1) as in Claim 1, characterized in that the magnet holding protrusions (10) that limit the slot orifices (11) and of which the inner surfaces facing each other are concave.
  4. A rotor (1) as in Claim 1, characterized in that the magnet holding protrusions (10) that limit the slot orifices (11) and of which the inner surfaces facing each other are convex.
PCT/EP2013/073415 2012-11-30 2013-11-08 A spoke permanent magnet rotor WO2014082840A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1020157013369A KR20150077468A (en) 2012-11-30 2013-11-08 A spoke permanent magnet rotor
CN201380062496.9A CN105009416A (en) 2012-11-30 2013-11-08 A spoke permanent magnet rotor
EP13789772.4A EP2926436A2 (en) 2012-11-30 2013-11-08 A spoke permanent magnet rotor
US14/648,858 US10177616B2 (en) 2012-11-30 2013-11-08 Spoke permanent magnet rotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2012/13949 2012-11-30
TR201213949 2012-11-30

Publications (2)

Publication Number Publication Date
WO2014082840A2 true WO2014082840A2 (en) 2014-06-05
WO2014082840A3 WO2014082840A3 (en) 2015-07-02

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ID=49582735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/073415 WO2014082840A2 (en) 2012-11-30 2013-11-08 A spoke permanent magnet rotor

Country Status (5)

Country Link
US (1) US10177616B2 (en)
EP (1) EP2926436A2 (en)
KR (1) KR20150077468A (en)
CN (1) CN105009416A (en)
WO (1) WO2014082840A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016155727A1 (en) * 2015-04-02 2016-10-06 Bühler Motor GmbH Permanent-magnet rotor
KR20170052005A (en) * 2015-11-03 2017-05-12 삼성전자주식회사 Motor
DE102015226791B4 (en) 2015-02-27 2023-04-06 Nidec Corporation engine

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10199892B2 (en) 2012-11-30 2019-02-05 Arcelik Anonim Sirketi Spoke permanent magnet rotor
KR101711136B1 (en) 2012-11-30 2017-02-28 아세릭 에이. 에스 A spoke permanent magnet rotor
WO2016024325A1 (en) * 2014-08-11 2016-02-18 富士電機株式会社 Dynamo-electric machine
WO2016024324A1 (en) * 2014-08-11 2016-02-18 富士電機株式会社 Dynamo-electric machine
KR101593066B1 (en) 2015-10-22 2016-02-11 주식회사 쿠스미 Metallic mold and injection molding machine with metallic mold
EP3371874B1 (en) * 2015-11-06 2020-04-01 Arçelik Anonim Sirketi Magnet retainer for use in an electric motor
US10326323B2 (en) 2015-12-11 2019-06-18 Whirlpool Corporation Multi-component rotor for an electric motor of an appliance
DE102016209174A1 (en) * 2016-05-25 2017-11-30 Continental Automotive Gmbh Rotor and method of manufacturing a rotor
US10704180B2 (en) 2016-09-22 2020-07-07 Whirlpool Corporation Reinforcing cap for a tub rear wall of an appliance
US10693336B2 (en) 2017-06-02 2020-06-23 Whirlpool Corporation Winding configuration electric motor
JP2021007275A (en) * 2017-09-27 2021-01-21 日本電産株式会社 Spork-type motor, motor for vehicle, unmanned flying body and electric assist device
CN109728664B (en) * 2017-10-31 2020-07-03 大银微系统股份有限公司 Motor rotor with protection mechanism
CN111786479A (en) * 2020-07-09 2020-10-16 金华九禾磁电科技有限公司 Rotor and motor
USD1029714S1 (en) 2021-08-19 2024-06-04 Nidec Motor Corporation Spoked rotor
US11791679B2 (en) * 2021-08-19 2023-10-17 Nidec Motor Corporation Spoked rotor having deflectable magnet-retaining spokes

Family Cites Families (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445062A (en) 1978-12-26 1984-04-24 The Garrett Corporation Rotor assembly having anchors with undulating sides
EP0086272B1 (en) 1982-01-20 1986-04-16 Allied Corporation Rotor for axial field electromagnetic devices and method of construction therefor
JPS59230454A (en) * 1983-06-10 1984-12-25 Fanuc Ltd Manufacture of permanent magnet field rotor
JPS6135501A (en) 1984-07-27 1986-02-20 Tdk Corp Rotor magnet and manufacture of the same
JPS6356138A (en) 1986-08-26 1988-03-10 Matsushita Electric Works Ltd Motor
JPS63213444A (en) 1987-02-27 1988-09-06 Aichi Electric Co Ltd Rotor with permanent magnets
DE3713610A1 (en) 1987-04-23 1988-11-10 Heldt & Rossi Servoelektronik ROTOR FOR ELECTRIC MOTOR
GB2217924B (en) * 1988-04-25 1992-10-07 Matsushita Electric Works Ltd Permanent magnet rotor
JP2574007B2 (en) * 1988-08-02 1997-01-22 ファナック株式会社 Synchronous motor rotor
JP2795576B2 (en) 1992-02-28 1998-09-10 ファナック株式会社 Synchronous motor rotor
JPH0847190A (en) 1994-07-28 1996-02-16 Shibaura Eng Works Co Ltd Electric motor
TW364234B (en) 1997-04-14 1999-07-11 Sanyo Electric Co Rotor for an electric motor
JP3415406B2 (en) * 1997-09-05 2003-06-09 トヨタ自動車株式会社 Magnet-embedded AC motor and its design method
JP3490307B2 (en) 1998-09-29 2004-01-26 三菱電機株式会社 Permanent magnet type motor
JP2001204146A (en) 1999-11-08 2001-07-27 Isuzu Motors Ltd Rotor of rotating machine and its fabrication
US6703741B1 (en) * 1999-09-20 2004-03-09 Ecoair Corp. Permanent magnet rotor portion for electric machines
JP3607137B2 (en) 1999-10-21 2005-01-05 アイチエレック株式会社 Permanent magnet embedded rotor
JP3753046B2 (en) 2001-10-26 2006-03-08 日産自動車株式会社 Rotor structure of electric motor
DE10219190A1 (en) 2002-04-29 2003-11-13 Miele & Cie Permanent magnet rotor for electrical machine, has holding elements and cover plates in form of one-piece injection-molded part of plastic or other non-magnetic, electrically non-conducting material
FR2839211A1 (en) * 2002-04-29 2003-10-31 Conception & Dev Michelin Sa Electrical machine rotor for use at very high speeds, comprises hexagonal shaft in contact with pole pieces which combine to make housings for permanent magnets retained by axial rods and end plates
JP2003324925A (en) 2002-05-01 2003-11-14 Mitsuba Corp Motor
DE10318624A1 (en) 2003-04-24 2004-11-25 Minebea Co., Ltd. Rotor body for an electric motor
EP1471621A3 (en) 2003-04-24 2005-12-14 Minebea Co., Ltd. Rotor element for an electrical motor
US7148598B2 (en) 2003-10-23 2006-12-12 A.O. Smith Corporation Spoke permanent magnet rotors for electrical machines and methods of manufacturing same
US20050093391A1 (en) * 2003-11-03 2005-05-05 Mcmullen Patrick T. Sleeveless permanent magnet rotor construction
JP4102749B2 (en) 2003-12-24 2008-06-18 オークマ株式会社 Reluctance motor rotor
EP1557928A1 (en) 2004-01-15 2005-07-27 Siemens Aktiengesellschaft Electrical machine and corresponding cooling method
DE102004035724A1 (en) 2004-07-23 2006-02-16 Minebea Co., Ltd. Electric machine
US7157827B2 (en) 2004-09-21 2007-01-02 A. O. Smith Corporation Spoke permanent magnet rotor
KR100688206B1 (en) 2005-03-08 2007-03-02 엘지전자 주식회사 Motor
KR100624730B1 (en) 2005-04-04 2006-09-20 엘지전자 주식회사 Motor
US7772735B2 (en) 2006-04-19 2010-08-10 Asmo Co., Ltd. Embedded magnet type rotating electric machine
DE102007024406A1 (en) 2007-05-25 2008-11-27 Robert Bosch Gmbh Rotor arrangement for an electric motor
PL2201663T3 (en) 2007-10-11 2017-02-28 Thyssenkrupp Presta Ag Rotor for an electric motor
TWI389423B (en) 2008-05-15 2013-03-11 Sunonwealth Electr Mach Ind Co Motor rotor structure
FR2932618B1 (en) 2008-06-16 2010-11-19 Leroy Somer Moteurs ROTOR WITH PERMANENT MAGNETS AND ROTATING MACHINE COMPRISING SUCH A ROTOR
FR2935206B1 (en) 2008-08-20 2010-10-08 Michelin Soc Tech INTERIOR ROTOR FOR ELECTRICAL MACHINE WITH "T" -shaped MAGNETS
US8018110B2 (en) * 2009-04-30 2011-09-13 General Electric Company High speed internal permanent magnet machine and method of manufacturing the same
DE102009026524A1 (en) 2009-05-28 2010-12-02 Robert Bosch Gmbh Electric machine
DE102009045101A1 (en) 2009-09-29 2011-04-14 Robert Bosch Gmbh Rotor for electric machine, is provided with permanent magnet concentrically arranged around rotor axis in recess of rotor
CN102111025B (en) 2009-12-25 2013-03-27 中山大洋电机股份有限公司 Permanent magnet rotor of electric motor
WO2011114594A1 (en) 2010-03-15 2011-09-22 株式会社安川電機 Permanent magnet-type rotary generator
DE102011105515A1 (en) * 2010-06-29 2012-02-02 Schaeffler Technologies Gmbh & Co. Kg Magnetic assembly, in particular for an electrical machine and method for producing an assembly
CN102377257B (en) 2010-08-10 2016-03-30 德昌电机(深圳)有限公司 Brushless electric machine
DE202010017376U1 (en) 2010-08-16 2014-01-08 Robert Bosch Gmbh Attaching magnets to a rotor
DE102010061784A1 (en) 2010-11-23 2012-05-24 Robert Bosch Gmbh Spoke rotor for electric machine e.g. electromotor used in motor car, has inner ring that is extended concentrically around rotor shaft to form bearing for permanent magnet
DE102010061778A1 (en) 2010-11-23 2012-05-24 Robert Bosch Gmbh Spokes rotor for e.g. electric machine, has body fixed at shaft with sleeve, where shaft and/or sleeve is made of diamagnetic material and/or paramagnetic material with permeability number smaller than twelve
DE102010064259B4 (en) 2010-12-28 2014-09-04 Robert Bosch Gmbh Electric machine with a magnetic enclosure
KR20130027417A (en) 2011-09-07 2013-03-15 삼성전자주식회사 Motor and washing machine having the same
KR101880097B1 (en) 2012-01-19 2018-07-23 삼성전자주식회사 Motor and rotor thereof
US9362792B2 (en) * 2012-10-15 2016-06-07 Regal Beloit America, Inc. Radially embedded permanent magnet rotor having magnet retention features and methods thereof
US10199892B2 (en) 2012-11-30 2019-02-05 Arcelik Anonim Sirketi Spoke permanent magnet rotor
KR101711136B1 (en) 2012-11-30 2017-02-28 아세릭 에이. 에스 A spoke permanent magnet rotor
US20150061441A1 (en) 2013-08-29 2015-03-05 Regal Beloit America, Inc. Electric machine and associated method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015226791B4 (en) 2015-02-27 2023-04-06 Nidec Corporation engine
WO2016155727A1 (en) * 2015-04-02 2016-10-06 Bühler Motor GmbH Permanent-magnet rotor
KR20170052005A (en) * 2015-11-03 2017-05-12 삼성전자주식회사 Motor
EP3338343A4 (en) * 2015-11-03 2018-08-08 Samsung Electronics Co., Ltd. Motor
US10651696B2 (en) 2015-11-03 2020-05-12 Samsung Electronics Co., Ltd. Motor rotor
KR102498735B1 (en) 2015-11-03 2023-02-13 삼성전자주식회사 Motor

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US20150318744A1 (en) 2015-11-05
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US10177616B2 (en) 2019-01-08
EP2926436A2 (en) 2015-10-07

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