WO2021186767A1 - モータ - Google Patents
モータ Download PDFInfo
- Publication number
- WO2021186767A1 WO2021186767A1 PCT/JP2020/034773 JP2020034773W WO2021186767A1 WO 2021186767 A1 WO2021186767 A1 WO 2021186767A1 JP 2020034773 W JP2020034773 W JP 2020034773W WO 2021186767 A1 WO2021186767 A1 WO 2021186767A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnet
- rotor core
- core
- magnetic field
- field line
- 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.)
- Ceased
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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
-
- 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
- H02K1/278—Surface mounted magnets; Inset magnets
- H02K1/2783—Surface mounted magnets; Inset magnets with magnets arranged in Halbach arrays
Definitions
- the present invention relates to a motor.
- Synchronous multi-phase AC motors which are conventional rotary electric machines, include motors having a cylindrical rotor and a stator arranged concentrically with the rotor inside the rotor (for example, a patent).
- Patent Document 1 describes a motor in which a plurality of permanent magnets are arranged along the circumferential direction of the inner peripheral portion of the rotor.
- the plurality of permanent magnets are configured by using a magnet array called "Halbach array". That is, the plurality of permanent magnets have a first magnet having a magnetization direction as a radial direction and a second magnet having a magnetization direction as a circumferential direction, and the first magnet and the second magnet are along the circumferential direction. They are arranged alternately.
- An object of the present invention is to provide a motor capable of improving the output of the motor.
- One aspect of the motor of the present invention includes a cylindrical rotor core and a magnet group having first magnets and second magnets alternately arranged along the circumferential direction of the rotor core.
- the first magnetic field line generated in the first magnet is along the radial direction of the rotor core, and the second magnetic field line generated in the second magnet is inclined with respect to the first magnetic force line.
- the rotor core has an inner portion located radially inside the magnet group and an outer portion located radially outside the magnet group.
- the outer portion includes a first core that covers the first magnet from the radial outside, and a second core that covers at least a part of the second magnet in the central axis direction of the rotor core from the radial outside. It is characterized by having.
- the output can be improved.
- FIG. 1 It is a schematic partial cross-sectional view which shows the embodiment of the motor of this invention. It is an enlarged perspective view of the motor shown in FIG. It is an enlarged perspective view of the rotor included in the motor shown in FIG.
- the motor 1 shown in FIG. 1 is, for example, a motor mounted on a vehicle such as an automobile.
- the motor 1 includes a rotor 11 and a stator 9.
- the stator 9 has a cylindrical core back 91 and a plurality of teeth (protruding parts) 92 provided on the inner peripheral portion of the core back 91.
- the plurality of teeth 92 project radially toward the central axis O1 of the motor 1.
- a coil (not shown) having conductivity is wound around each tooth 92.
- the rotor 11 is arranged concentrically with the stator 9 inside the stator 9.
- the rotor 11 is rotatably supported around the central axis O1 of the motor 1.
- the rotor 11 includes a rotor core 2 and a magnet group 8.
- the rotor core 2 has a cylindrical shape as a whole.
- the magnet group 8 has a first magnet 81 and a second magnet 82 arranged alternately along the circumferential direction of the rotor core 2. Both the first magnet 81 and the second magnet 82 are composed of permanent magnets and are arranged in the same number.
- the rotor core 2 has an inner portion 3 located radially inside the magnet group 8 (on the central axis O1 side) and an outer portion 4 located radially outside the magnet group 8. And a connecting portion 5 for connecting the inner portion 3 and the outer portion 4.
- the inner portion 3 has a cylindrical shape.
- the outer portion 4 is provided along the circumferential direction of the inner portion 3.
- the outer portion 4 is arranged radially outward with respect to the first magnet 81 and the second magnet 82. This reduces the eddy current loss.
- the connecting portion 5 is provided between the inner portion 3 and the outer portion 4.
- the inner portion 3, the outer portion 4 and the connecting portion 5 can be integrally molded by using a molding die. Thereby, the rotor core 2 can be manufactured easily and quickly.
- a plurality of connecting portions 5 are arranged along the circumferential direction of the inner portion 3. As a result, the inner portion 3 and the outer portion 4 can be stably and firmly connected.
- the inner portion 3, the outer portion 4 and the connecting portion 5 are not limited to being integrally molded.
- a T-shaped magnetic material in which the second iron core 42 and the connecting portion 5 described later are integrated may be inserted between the second magnets 82.
- the second magnet 82 and the second iron core 42 are preferably fixed by an adhesive or the like.
- the constituent material of the rotor core 2 is not particularly limited.
- the rotor core 2 is composed of, for example, a magnetic material, and examples of the constituent material (soft magnetic material) of the magnetic material include electromagnetic steel (silicon steel), carbon steel, structural steel, pure iron, soft iron, stainless steel permalloy, and the like. Be done.
- a magnet group 8 is held between the inner portion 3 and the outer portion 4.
- the magnet group 8 has a plurality of first magnets 81 and a plurality of second magnets 82 alternately arranged along the circumferential direction of the rotor core 2.
- Each of the first magnet 81 and each second magnet 82 has an elongated shape along the central axis O1 direction, that is, has a rod shape or a plate shape.
- a first magnetic field line ML1 is generated in each of the first magnets 81.
- Each first magnetic field line ML1 is along the radial direction of the rotor core 2.
- the first magnetic field line ML1 of one of the first magnets 81 is located inside the rotor core 2, that is, on the central axis O1. It is the first magnetic field line ML1A to go.
- the first magnetic field line ML1 of the other first magnet 81 is the first magnetic field line ML1B that goes to the outside of the rotor core 2, that is, in the direction away from the central axis O1.
- a second magnetic field line ML2 is generated in each second magnet 82.
- Each second magnetic field line ML2 is inclined with respect to a virtual line VL (first magnetic force line ML1) connecting the center of the second magnet 82 and the central axis O1.
- VL first magnetic force line ML1
- the second magnet 82 is divided into two small magnets so that the directions of the second magnetic field lines ML2 are different.
- one of the two small magnets will be referred to as a "first split magnet (first small magnet) 821”
- the other small magnet will be referred to as a “second split magnet (second small magnet) 822”. ..
- a connecting portion 5 is located between the first dividing magnet 821 and the second dividing magnet 822.
- the second magnetic field line ML2 of the first dividing magnet (first small magnet) 821 is the second magnetic field line ML2A toward the inside of the rotor core 2.
- the second magnetic field line ML2 of the second dividing magnet 822 is the second magnetic force line ML2B that goes to the outside of the rotor core 2.
- Both the second magnetic line ML2A and the second magnetic line ML2B are inclined with respect to the virtual line VL.
- the inclination angle ⁇ 2A of the second magnetic field line ML2A with respect to the virtual line VL and the inclination angle ⁇ 2B of the second magnetic force line ML2B with respect to the virtual line VL are preferably, for example, more than 0 degrees and 90 degrees or less, and 25 degrees or more and 65 degrees or less. Is more preferable.
- the outer portion 4 has a first iron core 41 and a second iron core 42.
- the first iron core 41 is arranged so as to face the first magnet 81.
- the first iron core 41 has a plate shape along the central axis O1 direction, and covers the entire outer surface (front surface) 813 of the first magnet 81 from the outer side in the radial direction.
- the second iron core 42 is arranged so as to face both the second magnet 82, that is, the first dividing magnet 821 and the second dividing magnet 822.
- the second iron core 42 has a plate shape along the circumferential direction of the rotor core 2, and has a central axis O1 direction (center of the rotor core 2) with respect to the outer surface (front surface) 823 of the second magnet 82 from the radial outside. Covers at least part of the shaft).
- two second iron cores 42 are arranged at a distance from each other in the central axis O1 direction per second magnet 82.
- the magnetic flux can be attracted to the first iron core 41 and the second iron core 42 made of the material (magnetic material) having a relatively high magnetic permeability.
- the leakage flux is reduced (hereinafter referred to as "leakage flux reduction effect").
- the output of the motor 1 can be improved by combining the effect of reducing the leakage flux and the direction of each magnetic field line described above.
- each second core 42 is arranged per second magnet 82, and each second core 42 partially covers the outer surface 823 of the second magnet 82. .. As a result, the effect of reducing the leakage flux is improved.
- the thickness t82 along the radial direction of the second magnet 82 is thicker than the thickness t81 along the radial direction of the first magnet 81.
- the thickness t42 of the second iron core 42 can be made thinner than the thickness t41 of the first iron core 41, and the rotor core 2 (outer portion 4) can be made into a cylindrical body.
- the rotor core 2 can rotate stably.
- the magnetic flux staying in the second core 42 can be reduced.
- the present invention is not limited to this, and each part constituting the motor is replaced with an arbitrary configuration capable of exhibiting the same function. can do. Further, any component may be added.
- second magnetic field line ML2A ... second magnetic field line , ML2B ... second magnetic field line, O1 ... central axis, t41 ... thickness, t42 ... thickness, t81 ... thickness, t82 ... thickness, VL ... virtual line, ⁇ 2A ... tilt angle, ⁇ 2B ... tilt angle
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
図1に示すモータ1は、例えば、自動車等の車両に搭載して用いられるモータである。モータ1は、ロータ11と、ステータ9とを備える。
磁石群8は、ロータコア2の周方向に沿って交互に間隔を置いて配置された第1磁石81および第2磁石82を有する。第1磁石81と第2磁石82とは、いずれも永久磁石で構成され、同数ずつ配置される。
外側部4は、内側部3の周方向に沿って設けられる。外側部4は、第1磁石81および第2磁石82に対し、径方向外側に配置された状態となる。これにより、渦電流損が低減する。
第1鉄心41は、第1磁石81に臨んで配置される。第1鉄心41は、中心軸O1方向に沿った板状をなし、径方向外側から第1磁石81の外側の面(表側の面)813全体を覆う。
Claims (9)
- 筒状をなすロータコアと、
前記ロータコアの周方向に沿って交互に配置された第1磁石および第2磁石を有する磁石群とを備え、
前記第1磁石内で生じる第1磁力線は、前記ロータコアの径方向に沿っており、
前記第2磁石内で生じる第2磁力線は、前記第1磁力線に対して傾斜しており、
前記ロータコアは、前記磁石群よりも前記径方向内側に位置する内側部と、前記磁石群よりも前記径方向外側に位置する外側部とを有し、
前記外側部は、前記第1磁石を前記径方向外側から覆う第1鉄心と、前記第2磁石の前記ロータコアの中心軸方向の少なとも一部を、前記径方向外側から覆う第2鉄心とを有することを特徴とするモータ。 - 前記第2磁石の前記径方向に沿った厚さは、前記第1磁石の前記径方向に沿った厚さよりも厚い請求項1に記載のモータ。
- 前記第2鉄心の前記径方向に沿った厚さは、前記第1鉄心の前記径方向に沿った厚さよりも薄い請求項2に記載のモータ。
- 前記第2鉄心は、前記中心軸方向に互いに距離を置いて複数配置される請求項1~3のいずれか1項に記載のモータ。
- 前記第2鉄心の少なくとも一部は、磁性体で構成される請求項1~4のいずれか1項に記載のモータ。
- 前記ロータコアは、前記内側部と前記外側部とを連結する連結部を有する請求項1~5いずれか1項に記載のモータ。
- 前記第2磁石を介して前記周方向に隣り合う第1磁石同士のうち、一方の第1磁石の前記第1磁力線は、前記ロータコアの内側に向かい、他方の第1磁石の前記第1磁力線は、前記ロータコアの外側に向かう請求項1~6のいずれか1項に記載のモータ。
- 前記第2磁石は、前記第2磁力線の向きが異なるよう、2つに分かれている請求項1~7のいずれか1項に記載のモータ。
- 前記2つに分かれている第2磁石うち、一方の前記第2磁力線は、前記ロータコアの内側に向かい、他方の前記第2磁力線は、前記ロータコアの外側に向かう請求項8に記載のモータ。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020571868A JP7548018B2 (ja) | 2020-03-18 | 2020-09-14 | モータ |
| US17/908,601 US12149125B2 (en) | 2020-03-18 | 2020-09-14 | Motor |
| CN202080098508.3A CN115280642B (zh) | 2020-03-18 | 2020-09-14 | 马达 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-048172 | 2020-03-18 | ||
| JP2020048172 | 2020-03-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021186767A1 true WO2021186767A1 (ja) | 2021-09-23 |
Family
ID=77771089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/034773 Ceased WO2021186767A1 (ja) | 2020-03-18 | 2020-09-14 | モータ |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12149125B2 (ja) |
| JP (1) | JP7548018B2 (ja) |
| CN (1) | CN115280642B (ja) |
| WO (1) | WO2021186767A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117795824A (zh) * | 2021-08-31 | 2024-03-29 | 美蓓亚三美株式会社 | 马达 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010207067A (ja) * | 2009-03-06 | 2010-09-16 | Hyundai Motor Co Ltd | 磁石埋込み型ロータ |
| WO2014115655A1 (ja) * | 2013-01-23 | 2014-07-31 | 三菱電機株式会社 | 回転子およびその回転子を備えた回転電機 |
| JP2018110487A (ja) * | 2017-01-04 | 2018-07-12 | 株式会社ミツバ | ロータおよび電動モータ |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11220846A (ja) * | 1998-02-03 | 1999-08-10 | Hitachi Ltd | 磁石回転子およびそれを用いた回転電機 |
| JP2002354721A (ja) * | 2001-05-29 | 2002-12-06 | Hitachi Ltd | 永久磁石式回転子を備えた回転電機 |
| JP4065829B2 (ja) * | 2003-10-10 | 2008-03-26 | 本田技研工業株式会社 | 永久磁石式回転子およびブラシレスモータ |
| US7436095B2 (en) * | 2005-10-31 | 2008-10-14 | Caterpillar Inc. | Rotary electric machine |
| WO2008023413A1 (fr) * | 2006-08-23 | 2008-02-28 | Kabushiki Kaisha Toshiba | Moteur électrique de type à aimant permanent |
| FR2959361B1 (fr) * | 2010-04-27 | 2015-11-13 | Valeo Equip Electr Moteur | Machine electrique tournante en particulier pour un demarreur de vehicule automobile |
| KR101235064B1 (ko) * | 2011-06-23 | 2013-02-19 | 기아자동차주식회사 | 로터의 영구자석 고정방법 |
| CN103534900B (zh) * | 2011-07-08 | 2016-01-20 | 三菱电机株式会社 | 永磁铁型旋转电机及其制造方法 |
| DE112012006417T5 (de) * | 2012-05-22 | 2015-02-26 | Mitsubishi Electric Corporation | Elektrische Rotationsmaschine mit eingebettetem Permanentmagneten |
| KR20190018046A (ko) * | 2012-09-29 | 2019-02-20 | 에머슨 일렉트릭 컴파니 | 분할형 자석 구조를 가진 로터와 관련 발전기 및 컴프레서 |
| JP2015061422A (ja) * | 2013-09-19 | 2015-03-30 | 株式会社デンソー | 動力伝達機構 |
| US10270306B2 (en) * | 2014-01-29 | 2019-04-23 | Denso Corporation | Motor and rotor |
| TWI679658B (zh) * | 2015-03-24 | 2019-12-11 | 日商日東電工股份有限公司 | 稀土類永久磁石及具有稀土類永久磁石之旋轉機 |
| JP6939543B2 (ja) | 2017-07-21 | 2021-09-22 | 株式会社デンソー | 回転電機 |
| CN109378913A (zh) * | 2018-09-12 | 2019-02-22 | 西安交通大学 | 一种表面开槽表贴式永磁同步电机转子结构 |
| JP7047985B1 (ja) * | 2020-06-26 | 2022-04-05 | 三菱電機株式会社 | 回転子およびこれを用いた回転電機 |
-
2020
- 2020-09-14 CN CN202080098508.3A patent/CN115280642B/zh active Active
- 2020-09-14 JP JP2020571868A patent/JP7548018B2/ja active Active
- 2020-09-14 US US17/908,601 patent/US12149125B2/en active Active
- 2020-09-14 WO PCT/JP2020/034773 patent/WO2021186767A1/ja not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010207067A (ja) * | 2009-03-06 | 2010-09-16 | Hyundai Motor Co Ltd | 磁石埋込み型ロータ |
| WO2014115655A1 (ja) * | 2013-01-23 | 2014-07-31 | 三菱電機株式会社 | 回転子およびその回転子を備えた回転電機 |
| JP2018110487A (ja) * | 2017-01-04 | 2018-07-12 | 株式会社ミツバ | ロータおよび電動モータ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115280642A (zh) | 2022-11-01 |
| US20230155432A1 (en) | 2023-05-18 |
| US12149125B2 (en) | 2024-11-19 |
| CN115280642B (zh) | 2025-10-03 |
| JP7548018B2 (ja) | 2024-09-10 |
| JPWO2021186767A1 (ja) | 2021-09-23 |
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