WO2015159461A1 - アキシャルエアギャップ型電動機 - Google Patents
アキシャルエアギャップ型電動機 Download PDFInfo
- Publication number
- WO2015159461A1 WO2015159461A1 PCT/JP2014/083818 JP2014083818W WO2015159461A1 WO 2015159461 A1 WO2015159461 A1 WO 2015159461A1 JP 2014083818 W JP2014083818 W JP 2014083818W WO 2015159461 A1 WO2015159461 A1 WO 2015159461A1
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- WIPO (PCT)
- Prior art keywords
- air gap
- electric motor
- gap type
- axial air
- laminated
- Prior art date
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Classifications
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- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
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- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
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- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/12—Machines characterised by the bobbins for supporting the windings
Definitions
- the present invention relates to an axial air gap type electric motor, and more particularly to an axial air gap type electric motor using a laminated iron core as a stator.
- PM Permanent Magnet
- a neodymium magnet is more efficient as a magnet, it is a rare metal (rare earth), and thus there are problems such as cost.
- a ferrite magnet As a magnet that does not use rare metals, it is common to use a ferrite magnet, but in a radial air gap type motor having an air gap in the same direction as the rotating shaft, a ferrite magnet is used along the rotating direction of the output shaft. In order to obtain the same performance as the neodymium magnet, it is necessary to increase the electric motor and the volume of the ferrite magnet. That is, there is a problem that the output and the size of the device are traded off.
- An axial air gap type motor is known as an electric motor that solves the relationship between output and device size.
- the axial air gap type motor has a feature that the thickness in the direction of the rotation axis can be reduced, that is, flattened, compared to a radial air gap type motor such as an inner rotor type.
- Patent Document 1 discloses an axial air gap type electric motor in which a stator and a rotor face each other through a predetermined air gap in a radial direction of a rotating shaft.
- the stator includes a stator in which a plurality of stator cores are arranged in an annular shape around the rotation axis, and two rotors that are opposed to both end planes in the rotation axis direction of the stator.
- the stator core member includes an iron core, an insulator (bobbin), and a coil.
- the iron core is a laminated iron core having a substantially trapezoidal cross-sectional shape in which metal plate-like members are laminated in the rotation axis radial direction.
- the core member which is a plate-like magnetic material represented by electromagnetic steel plates and amorphous tape, varies in thickness (plate thickness deviation). There is a possibility that even if a certain number of sheets are laminated, the lamination dimension is not constant.
- stator core to be manufactured has a structure in which a laminated core that is a pillar is inserted into a cylindrical bobbin and then a coil is wound around the outer periphery of the bobbin, etc. There is a problem that the core member is buckled and cannot be inserted correctly. On the other hand, if the laminated size of the iron core is small, there is a problem that the iron core falls off from the bobbin, which may cause a reduction in the productivity of the axial air gap type motor.
- the laminated iron core used in the axial air gap type electric motor has a characteristic that the width of the laminated metal plate member changes from the rotating shaft in the radial direction of the rotating shaft (for example, a substantially trapezoidal cross section is formed by the stacking). is there. For this reason, if the number of laminated layers is increased or decreased in accordance with the plate thickness deviation, the shape of the laminated iron core will be different. Since it is necessary to always adjust the thickness and iron core shape to be changed with the calculated cutting width, controlling the cutting size and the number of layers while measuring the thickness of the member to be used at all times will result in extremely low productivity. There are challenges. It is desired to efficiently cope with the plate thickness deviation in the laminated iron core.
- a laminated iron core that is a column body in which metal plate-like members are laminated in the radial direction of the rotating shaft, a cylindrical bobbin having an inner diameter into which the laminated iron core is inserted, and an outer diameter extension of the laminated iron core.
- An axial gap comprising a stator in which a stator core formed of a coil is annularly arranged around a rotation axis, and at least one rotor facing the surface of the stator in the direction of the rotation axis with a predetermined air gap.
- An axial air gap type electric motor comprising a portion in which metal plate-like members having substantially the same width in the rotation direction are continuously laminated.
- FIG. 1A is a side view schematically showing an overall configuration of an axial air gap type electric motor that is a first embodiment to which the present invention is applied.
- FIG.1 (b) is the longitudinal cross-sectional perspective view which showed typically the principal part of the axial air gap type motor of 1st Embodiment.
- FIG. 2A is a perspective view schematically showing a stator core of the axial air gap type electric motor according to the first embodiment.
- FIG. 2B is a perspective view schematically showing a bobbin constituting the stator core.
- FIG.2 (c) is a front view which shows typically the stator comprised from the same stator core. It is the perspective view which shows typically the laminated iron core of 1st Embodiment, and the one part partial enlarged view.
- FIGS. 4A to 4D are end sectional views schematically showing an application example in which the main parts of the laminated cores of the first to third embodiments are combined.
- FIG. 1A shows an overall configuration of an axial air gap type electric motor 1 according to a first embodiment to which the present invention is applied
- FIG. An axial air gap type motor 1 includes a stator 2 in a substantially cylindrical housing 5, a rotor 3 fixed to the rotating shaft 4 and rotating together, an output side connected to the rotating shaft 4 through bearings, and a counter-output side.
- An end bracket, a cooling fan connected to the end of the rotating shaft 4 passing through the end bracket on the side opposite to the output shaft, and a fan cover for guiding cooling air generated by the cooling fan to the outer peripheral side of the housing 5 are provided.
- the axial air gap type motor 1 includes an annular stator 2 having a magnetic flux in the rotation axis direction, and two rotors 3 provided on the output shaft side and the counter-output shaft side.
- This is a two-rotor armature configuration that faces the plane through a predetermined air gap.
- the present invention is not limited to this, and can be applied to various types such as a single rotor type and a type including a plurality of stators and a plurality of rotors.
- stator 2 a plurality of (in this example, 12) stator cores 6 are arranged in an annular shape around the rotation axis direction, and the outer periphery thereof is directly fixed to the housing 5 by resin molding (not shown). Yes.
- the stator 2 may be separately solidified as a strength member by resin molding or the like, and may be fixed to the motor housing 5 with bolts or the like.
- the stator core 6 includes a laminated iron core 8, a bobbin 7 and a coil 9.
- the bobbin 7 includes a cylindrical portion 7a having a substantially trapezoidal inner diameter and outer diameter, a flange portion 7b extending a predetermined width in the vertical direction from the outer periphery near both ends of the cylindrical portion 7a, and a housing 7 side portion of the flange portion 7b.
- One or a plurality of coil drawing openings 7c are provided. That is, the laminated iron core 8 is inserted into the inner diameter of the cylindrical portion 7 a of the bobbin 7, and the coil is wound around the outer diameter of the cylindrical portion 7 a of the bobbin 7 in a plurality of stages.
- the laminated iron core 8 is formed by laminating a plate-like metal magnetic body (core member) in the radial direction of the rotary shaft 4 (from the rotary shaft 4 side to the housing 5 side), and has a substantially trapezoidal columnar cross section.
- a plate-like metal magnetic material a thin plate (tape) containing amorphous is applied, but is not limited thereto.
- the stator 2 is obtained by arranging the stator cores 6 thus configured in an annular shape.
- FIG. 3 shows the configuration of the laminated core 8.
- At least two or more core members 10a having substantially the same width in the rotation direction of the rotation shaft 4 are continuously stacked on the housing 5 side of the laminated core 8, and the rotation shaft side extends from the rotation shaft to the housing 5 (rotation shaft).
- At least two or more core members 10b whose width in the rotation direction of the rotation shaft 4 gradually increases as the diameter approaches (radial direction) are continuously stacked.
- the cross section of the laminated iron core 8 has a substantially home base shape composed of a trapezoidal portion formed by the core member 10b and a rectangular portion formed by the core member 10a.
- the outer diameter of the laminated iron core needs to substantially match the inner diameter of the bobbin 7 (or the inner diameter of the bobbin 7 is slightly larger). is there.
- the thickness of the laminated iron core 8 may not always be uniform.
- a core member formed by cutting a plate may have a case where the plate thickness dimension is not necessarily uniform, and for example, it may be difficult to completely eliminate a weak warp of the cut surface. is there. In other words, even if a predetermined number of core members are stacked, the stacked thickness may not be constant, so that it is necessary to adjust the stacked thickness.
- the rotating shaft 4 is arranged in accordance with the variation in the plate thickness dimension of the core member 10 b mainly laminated on the oblique side portion of the laminated core shape having a substantially trapezoidal shape.
- a straight portion (core member 10a) for increasing or decreasing a predetermined number of stacked layers is formed on the outer peripheral side, that is, on the side where the cut width of the stacked core is wide.
- the thickness of the laminated core 8 can be easily adjusted by increasing or decreasing the number of laminated core members 10a, and a highly accurate stator can be obtained in the axial air gap type electric motor. In addition, performance can be ensured.
- FIG. 5 the edge part cross section of the laminated iron core 8 of 2nd Embodiment is shown.
- the core member 10a that is linearly laminated in accordance with the cutting and laminating direction of the plate-like core member 10a is arranged on the inner periphery, that is, the laminated iron core 8 with respect to the rotary shaft 4 of the axial air gap type electric motor 1.
- a straight portion (core member 10a) for increasing / decreasing a predetermined number of stacked layers is formed on the narrow cutting width side (rotating shaft side).
- the thickness of the laminated core 8 can be easily adjusted by increasing / decreasing the number of laminated core members 10a, and a highly accurate stator can be obtained in an axial air gap type electric motor. In addition, performance can be ensured.
- the core member 10 a is a linear portion (core) for increasing or decreasing a predetermined number of layers near the center in the vertical direction with respect to the rotating shaft 4 of the axial air gap motor 1, that is, near the center in the stacking direction of the stacked cores 8.
- the member 10a) is formed.
- the thickness of the laminated core 8 can be easily adjusted by increasing / decreasing the number of laminated core members 10a, and a highly accurate stator can be obtained in an axial air gap type electric motor. In addition, performance can be ensured.
- 7A to 7D show end cross sections in an application example of the laminated core 8.
- the portion indicated by a dotted line indicates a straight line portion (core member 10a) for adjusting the thickness.
- FIG. 7A shows the core member 10 a laminated in a straight line on the outer peripheral side with respect to the rotary shaft 4 of the axial air gap type electric motor 1, that is, on the side where the core member has a wider cutting width and the inner side with respect to the rotary shaft 4. It is the structure provided in the both ends with the circumference side, ie, the side with the narrow cutting width of a core member.
- FIG. 7B shows that the core members 10 a stacked in a straight line are arranged on the outer peripheral side with respect to the rotary shaft 4 of the axial air gap type motor 1, that is, on the side where the core member has a wider cutting width, and on the rotary shaft 4.
- it is a structure provided both near the center in the vertical direction, that is, near the center of the hypotenuse of the laminated core 8.
- FIG. 7 (c) shows that the core members 10a stacked linearly are near the center in the vertical direction with respect to the rotating shaft 4 of the axial air gap type motor 1, that is, near the center of the hypotenuse of the laminated core 8.
- This is a configuration provided on both the inner peripheral side with respect to the rotating shaft 4, that is, on the side where the cutting width of the core member is narrow.
- FIG. 7D shows a configuration in which all of the first to third embodiments are provided simultaneously.
- the thickness in the stacking direction of each linear portion (core member 10a) is not necessarily uniform.
- the thickness may be 1 / 2N, respectively, or the thickness may be changed with a ratio of unequal each. Also good.
- the arrangement of the core members 10a stacked in a straight line is distributed at a plurality of locations, the number of core members 10a that increase or decrease at each adjustment location can be reduced, and further, by adjustment
- the overall shape of the laminated core 8 can also be made uniform. That is, by shortening the length of the straight line portion, the position when inserted and arranged in the bobbin 7 can be stabilized by maintaining the laminated core shape more approximate to a trapezoid.
- the core members 10a and 10b to be stacked do not necessarily have to be straight (horizontal), and may have an arc shape in the rotation axis rotation direction (the cross section of the end portion of the laminated core 8 has a fan shape, etc.). .
- SYMBOLS 1 Axial air gap type motor, 2 ... Stator, 3 ... Rotor, 4 ... Rotating shaft, 5 ... Housing, 6 ... Stator core, 7 ... Bobbin, 7a ... Cylindrical part, 7b ... Gutter part, 7c ... Drawer port, 8 ... Laminated core, 9 ... coil, 10a, 10b ... core member
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
積層鉄心における板厚偏差に効率的に対応することが望まれる。
本発明の他の課題及び効果は、以下の記載から更に明らかとなる。
〔第1実施形態〕
図1(a)に、本発明を適用した第1実施形態であるアキシャルエアギャップ型電動機1の全体構成を示し、図1(b)に要部の断面図を示す。アキシャルエアギャップ型電動機1は、概略筒形状のハウジング5内部にステータ2、回転軸4に固定されて共回りするロータ3、軸受を介して回転軸4と接続された出力側及び反出力側のエンドブラケット、反出力軸側のエンドブラケットを貫通した回転軸4の端部に接続されて共回りする冷却ファン及び冷却ファンの生成する冷却風をハウジング5の外周側に案内するファンカバーを備える。
図2(c)に示す様に、このようにして構成されたステータコア6を環状に配列することでステータ2を得るようになっている。
図3に、積層鉄心8の構成を示す。積層コア8のハウジング5側には、回転軸4の回転方向への幅が略同一のコア部材10aが少なくとも2枚以上連続積層され、回転軸側には、回転軸からハウジング5方向(回転軸径方向)に近づくのに応じて、回転軸4の回転方向への幅が徐々に大となるコア部材10bが少なくとも2枚以上連続積層されるようになっている。図4に示す様に、積層鉄心8の断面が、コア部材10bによる台形部分と、コア部材10aによる長方形部分とからなる概略ホームベース形状となる。
次いで、第2実施形態について説明する。図5に、第2実施形態の積層鉄心8の端部断面を示す。本実施形態では、板状になったコア部材10aの切断、積層方向に合せて直線状に積層されたコア部材10aをアキシャルエアギャップ型電動機1の回転軸4に対して内周即ち積層鉄心8の切断幅の狭い側(回転軸側)に所定の積層枚数を増減するための直線部(コア部材10a)を形成するようになっている。
最後に、第1~第3実施形態を組み合わせた応用例について説明する。図7(a)~(d)に、積層鉄心8の応用例における端部断面を示す。図中、丸点線で示した部分は、積厚調整用の直線部(コア部材10a)を示す。
Claims (5)
- 回転軸の径方向に金属板状部材を積層した柱体である積層鉄心と、該積層鉄心を挿入する内径を有する筒形状のボビンと、前記積層鉄心の外径延長上に巻き回されたコイルとからなるステータコアが、回転軸を中心に環状に配列してなるステータと、前記ステータの回転軸方向端部断面と所定のエアギャップを介して面対向する少なくとも1つのロータとを備えるアキシャルギャップ型電動機であって、
前記積層鉄心が、
回転軸心から径方向に向かうにつれて、前記回転軸の回転方向に幅が大となる金属板状部材を連続して積層した部分と、
前記回転軸の回転方向に幅が概略同一となる金属板状部材を連続して積層した部分と、からなるものであるアキシャルエアギャップ型電動機。 - 請求項1に記載のアキシャルエアギャップ型電動機であって、
前記回転軸の回転方向に幅が概略同一となる金属板状部材を連続して積層した部分が、回転軸径方向で最も外側であるアキシャルエアギャップ型電動機。 - 請求項1に記載のアキシャルエアギャップ型電動機であって、
前記回転軸の回転方向に幅が概略同一となる金属板状部材を連続して積層した部分が、回転軸径方向で最も回転軸側であるアキシャルエアギャップ型電動機。 - 請求項1に記載のアキシャルエアギャップ型電動機であって、
前記回転軸の回転方向に幅が概略同一となる金属板状部材を連続して積層した部分が、回転軸径方向の最も外側及び最も回転軸側以外の位置にあるアキシャルエアギャップ型電動機。 - 請求項1に記載のアキシャルエアギャップ型電動機であって、
前記回転軸の回転方向に幅が概略同一となる金属板状部材を連続して積層した部分が、前記回転軸心から径方向に向かうにつれて、前記回転軸の回転方向に幅が大となる金属板状部材を連続して積層した部分と互いに隣接して2以上あるアキシャルエアギャップ型電動機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14889626.9A EP3133717B1 (en) | 2014-04-14 | 2014-12-22 | Axial air gap type electric motor |
US15/304,248 US10536042B2 (en) | 2014-04-14 | 2014-12-22 | Axial air gap type electric motor |
CN201480079571.7A CN106415994B (zh) | 2014-04-14 | 2014-12-22 | 轴向气隙型电动机 |
JP2016513612A JP6375371B2 (ja) | 2014-04-14 | 2014-12-22 | アキシャルエアギャップ型電動機 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2014082445 | 2014-04-14 | ||
JP2014-082445 | 2014-04-14 |
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WO2015159461A1 true WO2015159461A1 (ja) | 2015-10-22 |
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PCT/JP2014/083818 WO2015159461A1 (ja) | 2014-04-14 | 2014-12-22 | アキシャルエアギャップ型電動機 |
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US (1) | US10536042B2 (ja) |
EP (1) | EP3133717B1 (ja) |
JP (3) | JP6375371B2 (ja) |
CN (1) | CN106415994B (ja) |
TW (1) | TWI552486B (ja) |
WO (1) | WO2015159461A1 (ja) |
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KR20190141018A (ko) * | 2016-03-02 | 2019-12-20 | 가부시키가이샤 히다치 산키시스템 | 액시얼 갭형 회전 전기 및 그 제조 방법 |
JP7174658B2 (ja) * | 2019-03-25 | 2022-11-17 | 株式会社日立産機システム | アキシャルギャップ型回転電機 |
DE112021000071T5 (de) * | 2020-05-08 | 2022-04-14 | Sumitomo Electric Industries, Ltd. | Kernstück, Stator-Kern, Stator und sich drehende Elektromaschine |
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2014
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- 2014-12-22 US US15/304,248 patent/US10536042B2/en active Active
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Publication number | Publication date |
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JP2020103039A (ja) | 2020-07-02 |
TWI552486B (zh) | 2016-10-01 |
EP3133717B1 (en) | 2020-06-10 |
CN106415994B (zh) | 2019-09-24 |
TW201541808A (zh) | 2015-11-01 |
US20170093232A1 (en) | 2017-03-30 |
JPWO2015159461A1 (ja) | 2017-04-13 |
EP3133717A1 (en) | 2017-02-22 |
CN106415994A (zh) | 2017-02-15 |
JP2018110528A (ja) | 2018-07-12 |
EP3133717A4 (en) | 2017-11-15 |
US10536042B2 (en) | 2020-01-14 |
JP6689312B2 (ja) | 2020-04-28 |
JP6375371B2 (ja) | 2018-08-15 |
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