KR101244574B1 - Rotor structure for flux concentrate type motor - Google Patents

Rotor structure for flux concentrate type motor Download PDF

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Publication number
KR101244574B1
KR101244574B1 KR1020110145711A KR20110145711A KR101244574B1 KR 101244574 B1 KR101244574 B1 KR 101244574B1 KR 1020110145711 A KR1020110145711 A KR 1020110145711A KR 20110145711 A KR20110145711 A KR 20110145711A KR 101244574 B1 KR101244574 B1 KR 101244574B1
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KR
South Korea
Prior art keywords
permanent magnet
rotor
motor
rotor core
magnetic flux
Prior art date
Application number
KR1020110145711A
Other languages
Korean (ko)
Inventor
서정호
차창환
오승태
최진우
Original Assignee
주식회사 효성
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Application filed by 주식회사 효성 filed Critical 주식회사 효성
Priority to KR1020110145711A priority Critical patent/KR101244574B1/en
Application granted granted Critical
Publication of KR101244574B1 publication Critical patent/KR101244574B1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotor
    • H02K1/272Inner rotor where the magnetisation axis of the magnets is radial or tangential
    • H02K1/274Inner rotor where the magnetisation axis of the magnets is radial or tangential consisting of a plurality of circumferentially positioned magnets
    • H02K1/2753Inner rotor where the magnetisation axis of the magnets is radial or tangential consisting of a plurality of circumferentially positioned magnets consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276Magnets embedded in the magnetic core
    • H02K1/2766Magnets embedded in the magnetic core having a flux concentration effect
    • H02K1/2773Magnets embedded in the magnetic core having a flux concentration effect consisting of tangentially magnetized radial magnets

Abstract

The present invention relates to a rotor of a flux-focused motor, wherein the rotor is composed of a rotor core and a rotor core central axis to which the rotor core is coupled, and the rotor core is radially disposed at regular intervals along the circumferential direction of the rotor core. Permanent magnet insertion slot; A permanent magnet disposed in the permanent magnet insertion slot and having a protective layer formed of a non-magnetic material having a predetermined thickness on a cross section exposed to the surface of the rotor core; .
In addition, the rotor of the magnetic flux concentrated motor according to the present invention further comprises a void for forming a magnetic flux barrier, the void comprises: a first void disposed in the space between the permanent magnet insertion slot; And a second gap disposed in a space between ends of the permanent magnet insertion slot facing the rotor core central axis. It is preferable to further include any one or more of.
Therefore, according to the present invention, by forming a protective layer of a nonmagnetic material on the surface of the permanent magnet inserted into the rotor of the flux-intensive motor to prevent the separation of the permanent magnet during rotation of the motor and to prevent damage to the permanent magnet during assembly of the motor There is an effect that can be, and by the protective layer formed of a non-magnetic material there is an effect that can prevent the magnetic flux leakage in the rotor core central axis direction.

Description

Rotor Structure for Flux Concentrate Type Motor

The present invention relates to a rotor of a magnetic flux-focused motor, and more particularly, to a rotor of a magnetic flux-focused motor, which protects a nonmagnetic material to prevent permanent magnets from falling off and permanent magnets during rotation of the motor. The layer is formed on the surface of the permanent magnet.

Recently, as the exhaustion of fossil fuels and environmental problems are highlighted, the demand for electric vehicles is increasing rapidly. An important technical factor for the commercialization of electric vehicles is the high efficiency and high output of motors for driving the induction motors. In addition, permanent magnet motors are used.

In order to improve the efficiency and high output of the permanent magnet type motor, it is one of the important factors to prevent the leakage of magnetic flux generated by the permanent magnet in the motor, and the prior art of forming the magnetic flux barrier to prevent magnetic flux leakage of the permanent magnet is Many have been filed.

In addition, in the case of an embedded permanent magnet motor in which permanent magnets are embedded in the permanent magnet motor, a conventional technique for preventing the permanent magnets embedded therein from being damaged during rotation of the motor or assembly of the motor. (Japanese Patent Application No. 2001-189258, etc.) has been filed, and in the case of the prior art (Japanese Patent Application No. 2001-189258), a sheet coated with an adhesive is attached to the surface of the permanent magnet so that the permanent magnet contacts the inner wall of the slot. There is a limit to preventing the breakage due to such reasons.

Accordingly, the present invention overcomes the above-mentioned limitations of the prior art and prevents permanent magnet breakage and separation due to motor rotation, and forms a protective layer made of a nonmagnetic material to use as a magnetic flux barrier to improve the performance of the motor. The technical configuration is disclosed as follows.

An object of the present invention, by forming a protective layer made of a non-magnetic material on the surface of the permanent magnet inserted into the rotor of the magnetic flux-focused motor, thereby preventing damage to the permanent magnet when assembling the motor and separation of the permanent magnet during rotation of the motor In addition, the present invention provides a rotor structure of a flux-intensive motor that can prevent leakage magnetic flux.

The rotor of the flux-focused motor according to the present invention comprises a rotor core and a rotor core central axis coupled to the rotor core, and a permanent magnet insertion slot radially disposed at regular intervals along the circumferential direction of the rotor core. ; A permanent magnet disposed in the permanent magnet insertion slot and having a protective layer of a nonmagnetic material formed on a surface thereof; .

In this case, the protective layer is preferably formed to surround the side of the surface of the permanent magnet exposed to the surface of the rotor core and the side facing the central axis of the rotor core.

In this case, the protective layer is preferably formed of at least one of aluminum (Al), copper (Cu) and plastic.

In this case, the permanent magnet is preferably a ferrite magnet.

In this case, the rotor further includes a void for forming a magnetic flux barrier, the void, the first void is disposed in the space between the permanent magnet insertion slot; And a second gap disposed in a space between ends of the permanent magnet insertion slot facing the rotor core central axis. It is preferable to include any one or more of them.

In addition, it is preferable that the cross section of the said 1st space | gap and said 2nd space | gap is circular, and the cross-sectional area of the said 1st space | gap is larger than the cross-sectional area of the said 2nd space | gap.

According to the present invention, by forming a protective layer of a non-magnetic material on the surface of the permanent magnet inserted into the rotor to prevent the permanent magnet from falling off during the rotation of the motor and at the same time to prevent damage to the permanent magnet when assembling the motor have.

In addition, according to the present invention, by forming a protective layer of a nonmagnetic material on the surface of the permanent magnet inserted into the motor, the protective layer serves as a magnetic flux barrier to prevent magnetic flux leaking in the rotor core central axis direction In addition to increasing the efficiency of the motor is also effective in preventing the degradation of the motor due to the low temperature potato.

1 is a cross-sectional view of a rotor of a flux concentration motor according to the present invention.
2 is a cross-sectional view of a permanent magnet inserted into the rotor of the flux-focused motor according to the present invention.
Figure 3 is an enlarged side view of a part of the rotor of the magnetic flux concentrated motor according to the present invention.

Before describing the embodiments of the present invention in detail, it is to be understood that the present invention is not limited to the above-described embodiments, but may be modified and changed without departing from the scope and spirit of the invention. In addition, the terms or words used in the present specification and claims are intended to comply with the technical spirit of the present invention based on the principle that the inventor can define the concept of appropriate terms in order to best explain the invention. It should be interpreted as a concept.

Hereinafter, the rotor of the flux-intensive motor according to the present invention will be described with reference to the accompanying drawings. 1 is a cross-sectional view of a rotor of a flux concentration motor according to the present invention.

The rotor of the magnetic flux concentrated motor according to the present invention, the rotor core 100, the permanent magnet insertion slot 110 is disposed radially at regular intervals along the circumferential direction; A permanent magnet 130 disposed in the permanent magnet insertion slot 110 and having a non-magnetic protective layer 131 having a predetermined thickness formed on a surface thereof; .

In this case, the permanent magnet 130 is preferably a ferrite magnet, but is not limited thereto.

In addition, the protective layer 131 serves to prevent breakage of the permanent magnet 130 during assembly of the rotor of the magnetic flux concentrated motor and detachment of the permanent magnet 130 during high speed rotation of the motor, and a predetermined thickness. It is preferable that the magnetic flux barrier is formed of a nonmagnetic material having a magnetic flux barrier to reduce the leakage magnetic flux in the rotor in the magnetic flux concentrated motor.

In addition, the nonmagnetic material is preferably formed of at least one of aluminum (Al), copper (Cu), and plastic, but is not limited thereto.

For example, when the permanent magnet 130 inserted into the rotor of the magnetic flux concentrated motor according to the present invention is a ferrite permanent magnet, irreversible demagnetization at low temperature results in deterioration of the motor performance, and thus, the protective layer 131 ) Is formed of aluminum (Al), which is a nonmagnetic material with good light and heat reflectivity, and serves as a magnetic flux barrier and prevents low temperature potatoes.

In addition, at this time, the space between the permanent magnet insertion slot 110 formed at a predetermined interval radially along the circumferential direction in the rotor core 100 or the permanent magnet insertion slot 110 facing the rotor core central axis 101. Voids forming a magnetic flux barrier in the space between the ends of the beam; It is preferable to form

The voids may include a first gap 151 disposed in a space between the permanent magnet insertion slots 110 as shown in FIG. 1; And a second gap 153 disposed in a space between ends of the permanent magnet insertion slot 110 facing the rotor core central axis 101. It is preferable to include any one or more of them.

In addition, as shown in FIG. 1, the cross section of the first gap 151 and the second gap 153 is circular, and the cross-sectional area of the first gap 151 is equal to that of the second gap 153. It is preferred to be larger than the cross-sectional area, but is not limited thereto.

Hereinafter, the protective layer 131 formed on the surface of the permanent magnet 130 in the rotor of the magnetic flux concentrated motor according to the present invention will be described in more detail with reference to the accompanying drawings. 2 is a cross-sectional view of the permanent magnet 130 inserted into the rotor of the flux-focused motor according to the present invention in the direction of the rotor core central axis 101 with the a-a 'line as a boundary, and FIG. This is a side view of the rotor of the flux-focused motor as viewed in the A direction.

Permanent magnet 130 is disposed in the permanent magnet insertion slot 110 in the rotor of the magnetic flux concentrated motor according to the present invention, as shown in Figures 2 and 3, the protective layer 131 is the permanent magnet 130 It is formed to surround the side surface exposed to the outer circumferential surface of the rotor core 100 and the side facing the rotor core central axis 101 of the surface.

Then, the surface 130a or 130b of the permanent magnet facing the permanent magnet disposed in the insertion slot of the adjacent permanent magnet 130 of the surface of the permanent magnet 130, that is, the first void 151 and The protective layer 131 is not formed on the surface of the permanent magnet facing the second gap 153.

Therefore, in the case of the magnetic flux concentrated motor according to the present invention, the magnetic flux generated in the permanent magnet 130 is concentrated toward the first void 151 or the second void 153 by the protective layer 131. In addition, the protective layer 131 formed on the side facing the rotor core central axis 101 among the surfaces of the permanent magnet 130 serves as a magnetic flux barrier to leak in the direction of the rotor core central axis 101. Can reduce the magnetic flux.

As described above, the present invention has been described and illustrated in connection with a preferred embodiment for illustrating the spirit of the present invention, but the present invention is not limited to the above-described configuration and operation as illustrated. It will be apparent to those skilled in the art that many modifications and variations are possible without departing from the scope of the present invention. Accordingly, it is to be understood that the invention encompasses all such changes and modifications as come within the scope of the appended claims.

100: rotor core
101: central axis of the rotor core
110: permanent magnet insertion slot
130: permanent magnet 131: protective layer
151: first gap 153: second gap

Claims (6)

  1. In the rotor of the magnetic flux concentrated motor to prevent the separation of permanent magnets and potatoes,
    The rotor is composed of a rotor core 100 and the rotor core central axis 101 coupled to the rotor core 100,
    A permanent magnet insertion slot 110 disposed radially at regular intervals along the circumferential direction of the rotor core 100; Is disposed in the permanent magnet insertion slot 110, a non-magnetic protective layer 131 having a predetermined thickness is formed on the surface,
    The rotor further includes a void for forming a magnetic flux barrier,
    The air gap may include: a first air gap 151 disposed in a space between the permanent magnet insertion slots 110; And a second gap 153 disposed in a space between ends of the permanent magnet insertion slot 110 facing the rotor core central axis 101. Rotor of the magnetic flux-focused motor, characterized in that it comprises any one or more of.
  2. The method of claim 1,
    The protective layer 131 is formed to surround a side exposed to the surface of the rotor core 100 and a side facing the rotor core central axis 101 among the surfaces of the permanent magnet 130. Rotors for magnetic flux-intensive motors.
  3. The method of claim 1,
    The protective layer 131, the rotor of the magnetic flux-focused motor, characterized in that formed of at least one material of aluminum (Al), copper (Cu) and plastic.
  4. The method of claim 1,
    The permanent magnet 130, the rotor of the magnetic flux concentrated motor, characterized in that the ferrite (Ferrite) magnet.
  5. delete
  6. The method of claim 1,
    The cross section of the first gap 151 and the second gap 153 is circular, the cross-sectional area of the first gap 151 is larger than the cross-sectional area of the second gap 153 magnetic flux concentration Rotor of type motor.
KR1020110145711A 2011-12-29 2011-12-29 Rotor structure for flux concentrate type motor KR101244574B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110145711A KR101244574B1 (en) 2011-12-29 2011-12-29 Rotor structure for flux concentrate type motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020110145711A KR101244574B1 (en) 2011-12-29 2011-12-29 Rotor structure for flux concentrate type motor
PCT/KR2012/011639 WO2013100667A1 (en) 2011-12-29 2012-12-27 Rotor structure for spoke-type motor

Publications (1)

Publication Number Publication Date
KR101244574B1 true KR101244574B1 (en) 2013-03-25

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KR (1) KR101244574B1 (en)
WO (1) WO2013100667A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101562106B1 (en) 2013-04-15 2015-10-20 가부시키가이샤 야스카와덴키 Rotating electrical machine and manufacturing method of rotor
KR20160017159A (en) 2014-07-31 2016-02-16 전자부품연구원 Wound field type synchronous motor and rotor thereof
KR20160017160A (en) 2014-07-31 2016-02-16 전자부품연구원 Interior permanent magnet synchronous motor adding transverse air-gap
GB2546482A (en) * 2016-01-14 2017-07-26 Jaguar Land Rover Ltd Electric machine apparatus
US10651696B2 (en) 2015-11-03 2020-05-12 Samsung Electronics Co., Ltd. Motor rotor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005012859A (en) * 2003-06-16 2005-01-13 Nissan Motor Co Ltd Rotor of motor and its manufacturing process
JP2006158012A (en) * 2004-11-25 2006-06-15 Honda Motor Co Ltd Method of manufacturing permanent magnet for use in ipm-type motor for automobile

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH089599A (en) * 1994-06-17 1996-01-12 Yaskawa Electric Corp Permanent magnet type rotor
JP4233950B2 (en) * 2003-08-01 2009-03-04 本田技研工業株式会社 Brushless motor
KR100624817B1 (en) * 2004-08-26 2006-09-20 엘지전자 주식회사 Rotor of Spoke Type Motor and Manufacturing Method
KR101106648B1 (en) * 2007-08-13 2012-01-18 삼성전자주식회사 Rotor of motor and manufacturing method thereof
KR200462693Y1 (en) * 2008-01-31 2012-09-26 삼성전자주식회사 Spoke type motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005012859A (en) * 2003-06-16 2005-01-13 Nissan Motor Co Ltd Rotor of motor and its manufacturing process
JP2006158012A (en) * 2004-11-25 2006-06-15 Honda Motor Co Ltd Method of manufacturing permanent magnet for use in ipm-type motor for automobile

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101562106B1 (en) 2013-04-15 2015-10-20 가부시키가이샤 야스카와덴키 Rotating electrical machine and manufacturing method of rotor
US9325209B2 (en) 2013-04-15 2016-04-26 Kabushiki Kaisha Yaskawa Denki Rotating electrical machine and manufacturing method of rotor
KR20160017159A (en) 2014-07-31 2016-02-16 전자부품연구원 Wound field type synchronous motor and rotor thereof
KR20160017160A (en) 2014-07-31 2016-02-16 전자부품연구원 Interior permanent magnet synchronous motor adding transverse air-gap
US10651696B2 (en) 2015-11-03 2020-05-12 Samsung Electronics Co., Ltd. Motor rotor
GB2546482A (en) * 2016-01-14 2017-07-26 Jaguar Land Rover Ltd Electric machine apparatus
GB2546482B (en) * 2016-01-14 2019-07-10 Jaguar Land Rover Ltd Electric machine apparatus

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