WO2015019746A1 - Stator core - Google Patents

Stator core Download PDF

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Publication number
WO2015019746A1
WO2015019746A1 PCT/JP2014/067380 JP2014067380W WO2015019746A1 WO 2015019746 A1 WO2015019746 A1 WO 2015019746A1 JP 2014067380 W JP2014067380 W JP 2014067380W WO 2015019746 A1 WO2015019746 A1 WO 2015019746A1
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WO
WIPO (PCT)
Prior art keywords
teeth
stator core
circumferential direction
plate
yoke
Prior art date
Application number
PCT/JP2014/067380
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French (fr)
Japanese (ja)
Inventor
永田　孝一
優一 水元
大野　正明
Original Assignee
株式会社デンソー
デンソートリム株式会社
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.)
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Publication date
Application filed by 株式会社デンソー, デンソートリム株式会社 filed Critical 株式会社デンソー
Priority to CN201480044160.4A priority Critical patent/CN105453386A/en
Publication of WO2015019746A1 publication Critical patent/WO2015019746A1/en

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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
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • 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
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators

Definitions

  • the present invention relates to a structure of a stator core for a rotating electrical machine.
  • a stator core for a rotating electrical machine has an annular yoke and a plurality of teeth extending radially from the yoke, and a coil is wound around each tooth by a bobbin or the like.
  • the teeth are composed of a laminated body that is separate from the yoke. This laminated body is formed of a plurality of plate-like magnetic body pieces laminated in the circumferential direction around the axis of the yoke. Generation of eddy currents can be suppressed by forming the teeth from a laminate.
  • the stator core and the rotor of the rotating electrical machine are the first of the rotor.
  • the magnetic flux from the magnetic pole enters the teeth of the stator core and becomes the effective magnetic flux of the coil, and forms a magnetic circuit for passing through the yoke and the adjacent teeth in order to enter the second magnetic pole of the rotor.
  • the teeth of the stator core after entering the teeth of the stator core from the first magnetic pole, there is a magnetic flux that enters the second magnetic pole at the tip of the tooth without being an effective magnetic flux of the coil. This is a phenomenon called short-circuiting of magnetic flux. When this magnetic flux short circuit amount increases, the effective magnetic flux which flows through a coil will reduce, and there exists a problem that the output of a rotary electric machine falls.
  • the teeth are composed of a plurality of plates laminated in the circumferential direction around the axis of the yoke, and the yoke is one of the two teeth adjacent in the circumferential direction. And a plate portion included in the other tooth are connected to each other, and a connection portion made of the same member connecting the two teeth is provided.
  • the magnetic resistance when the magnetic flux flows in the circumferential direction of the teeth is larger than the magnetic resistance when the magnetic flux flows in the radial direction of the teeth. can do. Therefore, the magnetic flux entering the teeth of the stator core from the first magnetic pole of the rotor is less likely to flow in the circumferential direction, and the degree of short-circuiting of the magnetic flux can be reduced. Therefore, the effective magnetic flux of a coil part can be increased and the fall of the output by a magnetic short circuit can be suppressed.
  • the magnetic flux that enters the plate portion of the teeth of the stator core from the first magnetic pole of the rotor enters the second magnetic pole of the rotor through the plate portion, the connection portion, and the plate portion in order.
  • the connection portion between the teeth and the yoke is integrally formed of the same member, so that there is no increase in magnetic resistance as in the conventional example, and a reduction in output of the rotating electrical machine can be suppressed.
  • FIG. 4 is a front view of the stator core of FIG. 3. It is an enlarged view of the arrow V part of FIG. It is a perspective view of the core element of FIG. It is a figure which shows a mode that the core element of FIG. 6 is laminated
  • the stator core according to the first embodiment of the present invention is applied to a magnet generator as a “rotating electric machine”.
  • the magnet generator 10 is mounted on, for example, a two-wheeled vehicle, and is used for charging a battery and supplying power to an ignition coil, a lamp, and other electric loads.
  • the magnet generator 10 is an outer rotor type magnet AC generator, and includes a stator 11, a rotor 15, and a crank position sensor 26.
  • the stator 11 is attached to the engine cover 5 by mounting bolts 27 and includes a stator core assembly 12, a bobbin 13, and a coil 14.
  • circumferential direction refers to a circumferential direction around the axis of the stator 11.
  • the wiring to the coil 14 is electrically connected to the connector 29 via the cable 28.
  • a signal line from the crank position sensor 26 is also connected to the connector 29.
  • the rotor 15 includes a rotor body 16 and a rotor base 23 including an attachment hole 24 for attachment to the crankshaft 6 of the engine.
  • the rotor body 16 has a cup shape including a cylindrical portion 17 and a bottom portion 18 and is made of iron or the like.
  • the cylindrical portion 17 is disposed on the radially outer side with respect to the stator 11.
  • first magnets 19 having a radially inner polarity of N poles
  • second magnets 21 having a radially inner polarity of S poles are alternately attached in the circumferential direction.
  • a crank position detection unit 22 for detecting the crank position of the engine is provided on the outer wall of the cylinder portion 17, and the rotation of the rotor 15 is detected by the crank position sensor 26 detecting the crank position detection unit 22. The state can be detected.
  • the rotor base 23 is fastened to the bottom 18 of the rotor body 16, and an attachment hole 24 and a key groove 25 are formed at the center.
  • the crankshaft 6 of the engine is directly connected to the mounting hole 24 and the keyway 25, the rotor 15 rotates integrally with the crankshaft 6.
  • the magnetic pole around the coil 14 continuously changes, and an induced electromotive force is generated in the coil 14 due to the change in the magnetic pole.
  • This induced electromotive force is output as a single phase by the wiring of the coil 14 and the magnetic pole arrangement.
  • the stator core Assy 12 has a mounting portion 30 and a stator core 40.
  • the mounting portion 30 is an annular member fixed to the inner wall of the stator core 40 by, for example, press fitting, and a plurality of mounting holes 31 through which mounting bolts 27 (see FIG. 1) can be inserted, and terminals through which terminals for wiring pass.
  • a hole 32 is provided.
  • the stator core 40 has an annular yoke 41 and a plurality of teeth 42 extending radially from the yoke 41. In the present embodiment, the number of teeth 42 is twelve. A coil 14 is wound around each tooth 42. In the present embodiment, the coil 14 is wound around the bobbin 13 provided on the tooth 42 by concentrated winding.
  • the stator core 40 is formed by arranging a plurality of core elements Assy (assemblies) 44 in the circumferential direction.
  • core elements Assy assemblies
  • twelve core elements Assy 44 are provided as many as the number of teeth 42.
  • a single-phase generator can be used.
  • the core element Assy 44 is composed of a stacked body of a plurality of U-shaped core elements 45 to 49.
  • one core element 45 is formed by bending a plate material into a U shape, and includes a first plate portion 51, a second plate portion 61, and a connection portion 71.
  • the first plate portion 51 has a winding portion 76 extending in the radial direction and a flange portion 77 protruding in the axial direction from the tip of the winding portion 76.
  • the collar portion 77 corresponds to a “first collar portion”.
  • the axial width W2 of the flange portion 77 is made larger than the axial width W1 of the winding portion 76.
  • the remaining core elements 45 to 49 have first plate portions 52 to 55, second plate portions 62 to 65, and connection portions 72 to 75, respectively.
  • the core element Assy 44 is configured such that the connection portions 71 to 75 of the core elements 45 to 49 are stacked in the radial direction, and the first plate portions 51 to 55 and the first plate portions 51 to 55 of the core elements 45 to 49 are arranged.
  • the two plate portions 61 to 65 are combined as shown in FIG. 7 so as to be laminated in the circumferential direction.
  • the connecting portions 71 to 75 of the core elements 45 to 49 are formed such that the ones located on the outer side in the radial direction have a shorter circumferential length and can be stacked.
  • the first plate portions 51 to 55 and the second plate portions 61 to 65 of the core elements 45 to 49 are formed such that the one located closer to the inner side in the circumferential direction in the core element Assy 44 has a shorter radial direction and can be stacked. I have to.
  • the teeth 42 are composed of the first plate portions 51 to 55 and the second plate portions 61 to 65 stacked in the circumferential direction.
  • the teeth 42 are configured by the second plate portions 61 to 65 on one side in the circumferential direction and the first plate portions 51 to 55 on the other side in the circumferential direction.
  • the yoke 41 connects the first plate portions 51 to 55 included in one of the two teeth 42 adjacent in the circumferential direction to the second plate portions 61 to 65 included in the other tooth 42.
  • the connection parts 71 to 75 are configured.
  • the first plate portions 51 to 55, the second plate portions 61 to 65, and the connection portions 71 to 75 are the same member and are integrally configured.
  • a virtual straight line along the first plate portion 51 of the core element 45 is a first virtual straight line L1
  • a virtual straight line along the second plate portion 61 is a second virtual straight line L2
  • the first virtual straight line L1 are located on the axis AX side with respect to the connecting portion 71.
  • the intersection point P coincides with the axis AX.
  • each tooth 42 has a larger circumferential interval toward the radially outer side.
  • the front end surface 78 of the tooth 42 has an arc shape that substantially follows a virtual cylindrical surface 79 that is a virtual cylindrical surface concentric with the axial center AX. Is set to the length of each core element.
  • the end surfaces of the first plate portions 51 to 55 and the second plate portions 61 to 65 are planes substantially perpendicular to the extending direction of the second plate portions 61 to 65 of the first plate portions 51 to 55, By appropriately adjusting the radial lengths of the first plate portions 51 to 55 and the second plate portions 61 to 65, the tip surface 78 of the tooth 42 is formed in an arc shape.
  • the teeth 42 of the stator core 40 are composed of first plate portions 51 to 55 and second plate portions 61 to 65 stacked in the circumferential direction around the axis AX, and the yokes 41 are adjacent in the circumferential direction.
  • the first plate portions 51 to 55 included in one of the teeth 42 and the connection portions 71 to 75 connecting the second plate portions 61 to 65 included in the other tooth 42 are configured. Therefore, the magnetic resistance when the magnetic flux flows through the teeth 42 in the circumferential direction can be made larger than the magnetic resistance when the magnetic flux flows through the teeth 42 in the radial direction.
  • the magnetic flux entering the teeth 42 of the stator core 40 from the rotor 15 is less likely to flow in the circumferential direction, and the magnetic flux is less likely to be short-circuited. Therefore, it is possible to suppress a decrease in the effective magnetic flux flowing through the coil and to suppress a decrease in the output of the magnet generator 10. Furthermore, since the first magnetic pole and the second magnetic pole of the rotor 15 are composed of the respective magnets, the magnetic gap in the circumferential direction can be reduced because the minute gap between the magnets is set to be equal to or greater than the plate thickness of the teeth portion, A decrease in output of the magnet generator 10 can be suppressed.
  • the magnetic flux entering the first plate portion 51 of the teeth 42 of the stator core 40 from the rotor 15 sequentially passes through the connection portion 71 and the second plate portion 61 that are the same member and integral with the first plate portion 51. Enter the rotor 15. The same applies to the other plate portions. Therefore, an increase in magnetic resistance at the connection portion between the teeth 42 and the yoke 41 can be suppressed, and a decrease in the output of the magnet generator 10 can be suppressed.
  • the core elements 45 to 49 are formed by bending a relatively small plate material into a U shape. Therefore, when manufacturing the core elements 45 to 49, a small press can be used, so that the equipment cost can be minimized. In addition, the core elements 45 to 49 can be manufactured relatively inexpensively and in large quantities by pressing.
  • the teeth 42 are composed of the second plate portions 61 to 65 on one side in the circumferential direction and the first plate portions 51 to 55 on the other side in the circumferential direction. Therefore, the magnetic circuit that flows the magnetic flux that has entered the teeth 42 from the rotor 15 to the teeth 42 adjacent to one side in the circumferential direction, and the magnetic flux that has entered the teeth 42 from the rotor 15 to the teeth 42 adjacent to the other side in the circumferential direction. And a magnetic circuit.
  • the yoke 41 is composed of connecting portions 71 to 75 of core elements 45 to 49 stacked in the radial direction. Accordingly, the teeth 42 can be configured by laminating the first plate portions 51 to 55 and the second plate portions 61 to 65 in the circumferential direction.
  • the axial width W1 of the winding portion 76 of the first plate portions 51 to 55 is smaller than the axial width W2 of the flange portion 77. Therefore, it is possible to reduce the outer diameter of the coil 14 wound around the winding portion 76 via the bobbin 13 while increasing the area of the tip surface 78 of the tooth 42 facing the magnetic pole of the rotor 15. Therefore, the stator core 40 becomes compact in the axial direction, and more magnetic flux can be introduced by increasing the length of the flange while suppressing the magnetic short circuit in the circumferential direction, and the output of the magnet generator 10 is increased. be able to.
  • the tip surface 78 of the tooth 42 has an arc shape along a virtual cylindrical surface 79 which is a virtual cylindrical surface concentric with the axis AX. Therefore, the gap between the rotor 15 and the stator core 40 can be made uniform in the circumferential direction, and the output of the magnet generator 10 can be maximized, and the contact failure between the rotor 15 and the stator 11 can be prevented.
  • the flange portions 84 and 85 are formed when the core element 86 is made from a plate material.
  • the first plate portion 82 and the second plate portion 83 correspond to “specific plate portions”, and the flange portions 84 and 85 correspond to “second flange portions”.
  • the stator core 80 is formed by arranging a plurality of core elements Assy 88 formed of a laminated body of core elements 45 to 49, 86 in the circumferential direction. According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the area of the tip end surface 87 of the tooth 81 facing the magnetic pole of the rotor can be increased. As a result, the magnetic resistance between the rotor and the stator core 80 is reduced, and power generation loss can be reduced.
  • the core element may not have the connecting portion laminated in the radial direction.
  • the teeth may be configured by one second plate portion on one side in the circumferential direction and one first plate portion on the other side in the circumferential direction. In short, it is sufficient that two or more plate portions are laminated in the circumferential direction in the teeth.
  • the plate portion of the core element may not have a flange portion. That is, the width of the plate portion may be constant from the proximal end to the distal end.
  • the tip end surface of the teeth may be formed into a smooth curved surface by, for example, machining. Thereby, the clearance gap between a rotor and teeth can be made more uniform.
  • the tip surface of the tooth may be a flat surface.
  • the number of teeth may be 11 or less, or 13 or more.
  • the coil may be wound by distributed winding other than concentrated winding, for example.
  • the stator core is not limited to one corresponding to the outer rotor, but may be one corresponding to the inner rotor. That is, the teeth of the stator rotor may extend radially inward from the annular yoke.
  • the first magnetic pole and the second magnetic pole of the rotor may be configured by magnetizing the same magnet with respective polarities.
  • the stator core is not limited to an AC generator for a motorcycle, but may be applied to a generator for various uses or an electric motor such as a brushless motor.
  • the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

The teeth (42) of a stator core (40) are configured from first plate parts (51-55) and second plate parts (61-65) which are stacked in the circumferential direction, and a yoke (41) is configured from connecting parts (71-75) which connect the first plate parts (51-55) included in one of two adjacent teeth (42) and the second plate parts (61-65) included in the other of the two adjacent teeth (42). Therefore, the magnetic resistance is greater when the magnetic flux flows in the circumferential direction in the teeth (42) than when the magnetic flux flows in the radial direction in the teeth (42), so the magnetic flux entering the teeth (42) from the rotor (15) is less likely short-circuit in the circumferential direction. Furthermore, the magnetic flux entering the first plate part (51) of the teeth (42) from the rotor (15) passes sequentially through the connecting part (71) and the second plate part (61), which are the same material as the first plate part (51), and then enters the rotor (15). Therefore, magnetic resistance of the connection site between the teeth (42) and the yoke (41) is minimized as much as possible.

Description

ステータコアStator core
　本発明は、回転電機用のステータコアの構造に関する。 The present invention relates to a structure of a stator core for a rotating electrical machine.
　回転電機用のステータコアは、環状のヨークと、ヨークから放射状に延びている複数のティースとを有しており、各ティースにはボビンなどでコイルが巻線されている。
　例えば特許文献１では、ティースは、ヨークとは別体の積層体から構成されている。この積層体は、ヨークの軸心まわりの周方向へ積層された複数の板状の磁性体片から形成されている。ティースを積層体から構成することによって、渦電流の発生を抑えることができる。 A stator core for a rotating electrical machine has an annular yoke and a plurality of teeth extending radially from the yoke, and a coil is wound around each tooth by a bobbin or the like.
For example, in Patent Document 1, the teeth are composed of a laminated body that is separate from the yoke. This laminated body is formed of a plurality of plate-like magnetic body pieces laminated in the circumferential direction around the axis of the yoke. Generation of eddy currents can be suppressed by forming the teeth from a laminate.
特開平７－２３１５８７号公報Japanese Patent Application Laid-Open No. 7-231588
　ところで、ロータが有する磁極のうち、径方向内側がＮ極の磁極を第１磁極とし、径方向内側がＳ極の磁極を第２磁極とすると、回転電機のステータコアおよびロータは、ロータの第１磁極から出た磁束がステータコアのティースに入りコイルの有効磁束となって、ヨークと隣のティースとを順に通ってロータの第２磁極に入るための磁気回路を構成している。
　これに対し、第１磁極からステータコアのティースに入ったあとコイルの有効磁束とならずに、ティース先端部で第２磁極に入る磁束がある。これは磁束の短絡といわれる現象である。この磁束短絡量が増えると、コイルを流れる有効磁束が減少し、回転電機の出力が低下するという問題がある。 By the way, out of the magnetic poles of the rotor, if the magnetic pole having the N pole on the radially inner side is the first magnetic pole and the magnetic pole having the S pole on the radially inner side is the second magnetic pole, the stator core and the rotor of the rotating electrical machine are the first of the rotor. The magnetic flux from the magnetic pole enters the teeth of the stator core and becomes the effective magnetic flux of the coil, and forms a magnetic circuit for passing through the yoke and the adjacent teeth in order to enter the second magnetic pole of the rotor.
On the other hand, after entering the teeth of the stator core from the first magnetic pole, there is a magnetic flux that enters the second magnetic pole at the tip of the tooth without being an effective magnetic flux of the coil. This is a phenomenon called short-circuiting of magnetic flux. When this magnetic flux short circuit amount increases, the effective magnetic flux which flows through a coil will reduce, and there exists a problem that the output of a rotary electric machine falls.
　したがって、磁束の短絡方向、すなわちヨークの軸心まわりの周方向へ板材を積層させてティースを形成すれば、短絡方向の磁気抵抗が増え、磁束の短絡を抑制することができると考えられるが、このことは特許文献１により実現されている。
　しかし、特許文献１では、ステータコアを構成するヨークとティースとが別体である。そのため、磁気回路は、ヨークとティースとの接続箇所で分断され微少なエアギャップが存在する。この分断による磁気抵抗の増加は、コイルの有効磁束を減少させ回転電機の出力低下を招く。
　本発明は、上述の点に鑑みてなされたものであり、その目的は、回転電機の出力低下を抑制可能なステータコアを提供することである。 Therefore, if the teeth are formed by laminating plate materials in the magnetic flux short-circuit direction, that is, the circumferential direction around the axis of the yoke, it is considered that the magnetic resistance in the short-circuit direction increases and the magnetic flux short-circuit can be suppressed. This is realized by Patent Document 1.
However, in patent document 1, the yoke and teeth which comprise a stator core are separate bodies. For this reason, the magnetic circuit is divided at the connecting portion between the yoke and the tooth, and a minute air gap exists. The increase in magnetoresistance due to this division reduces the effective magnetic flux of the coil and causes the output of the rotating electrical machine to decrease.
This invention is made | formed in view of the above-mentioned point, The objective is to provide the stator core which can suppress the output fall of a rotary electric machine.
　本発明による回転電機用のステータコアでは、ティースは、ヨークの軸心まわりの周方向へ積層されている複数の板部から構成され、ヨークは、周方向で隣り合う２つのティースのうち一方のティースに含まれる板部と他方のティースに含まれる板部とを接続しておりまた、２つのティースをつなぐ同一の部材から構成されている接続部を有している。 In the stator core for a rotating electrical machine according to the present invention, the teeth are composed of a plurality of plates laminated in the circumferential direction around the axis of the yoke, and the yoke is one of the two teeth adjacent in the circumferential direction. And a plate portion included in the other tooth are connected to each other, and a connection portion made of the same member connecting the two teeth is provided.
　このように構成されたステータコアでは、周方向にコアを積層してあるため、磁束がティースの径方向へ流れるときの磁気抵抗と比べて、磁束がティースの周方向へ流れるときの磁気抵抗を大きくすることができる。そのため、ロータの第１磁極からステータコアのティースに入る磁束が周方向へ流れにくくなり、磁束の短絡度を少なくすることができる。したがって、コイル部の有効磁束を増やすことができ、磁気短絡による出力の低下を抑制することができる。 In the stator core configured as described above, since the cores are laminated in the circumferential direction, the magnetic resistance when the magnetic flux flows in the circumferential direction of the teeth is larger than the magnetic resistance when the magnetic flux flows in the radial direction of the teeth. can do. Therefore, the magnetic flux entering the teeth of the stator core from the first magnetic pole of the rotor is less likely to flow in the circumferential direction, and the degree of short-circuiting of the magnetic flux can be reduced. Therefore, the effective magnetic flux of a coil part can be increased and the fall of the output by a magnetic short circuit can be suppressed.
　また、上述の構成のステータコアでは、ロータの第１磁極からステータコアのティースの板部に入る磁束は、その板部と接続部と板部とを順に通ってロータの第２磁極に入る。ティースとヨークとの接続部は同一部材で一体的に構成してあり、従来例のような磁気抵抗の増加はなく、回転電機の出力低下を抑制することができる。 Further, in the stator core having the above-described configuration, the magnetic flux that enters the plate portion of the teeth of the stator core from the first magnetic pole of the rotor enters the second magnetic pole of the rotor through the plate portion, the connection portion, and the plate portion in order. The connection portion between the teeth and the yoke is integrally formed of the same member, so that there is no increase in magnetic resistance as in the conventional example, and a reduction in output of the rotating electrical machine can be suppressed.
本発明の第１実施形態によるステータコアが適用された発電機の正面図である。It is a front view of the generator with which the stator core by 1st Embodiment of this invention was applied. 図１の発電機の縦断面図である。It is a longitudinal cross-sectional view of the generator of FIG. 図１のステータコアＡｓｓｙの正面図である。It is a front view of the stator core Assy of FIG. 図３のステータコアの正面図である。FIG. 4 is a front view of the stator core of FIG. 3. 図４の矢印Ｖ部分の拡大図である。It is an enlarged view of the arrow V part of FIG. 図４のコアエレメントの斜視図である。It is a perspective view of the core element of FIG. 図６のコアエレメントを複数積層させてコアエレメントＡｓｓｙとする様子を示す図である。It is a figure which shows a mode that the core element of FIG. 6 is laminated | stacked and it is set as the core element Assy. 本発明の第２実施形態によるステータコアの正面図である。It is a front view of the stator core by 2nd Embodiment of this invention. 図８の矢印ＩＸ部分の拡大図である。It is an enlarged view of the arrow IX part of FIG.
　以下、本発明の複数の実施形態を図面に基づき説明する。実施形態同士で実質的に同一の構成には同一の符号を付して説明を省略する。
　（第１実施形態）
　本発明の第１実施形態によるステータコアは、「回転電機」としての磁石式発電機に適用されている。磁石式発電機１０は、例えば二輪車等に搭載され、バッテリの充電、および、点火コイルやランプ、その他電気負荷への電力供給などのために利用される。 Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted.
(First embodiment)
The stator core according to the first embodiment of the present invention is applied to a magnet generator as a “rotating electric machine”. The magnet generator 10 is mounted on, for example, a two-wheeled vehicle, and is used for charging a battery and supplying power to an ignition coil, a lamp, and other electric loads.
　まず、発電機について図１、図２を参照して説明する。図１、図２に示すように、磁石式発電機１０は、アウターロータ型の磁石式交流発電機であり、ステータ１１、ロータ１５およびクランク位置センサ２６を備えている。ステータ１１は、取付ボルト２７によってエンジンカバー５に取り付けられており、ステータコアＡｓｓｙ（アセンブリ）１２、ボビン１３およびコイル１４から構成されている。 First, the generator will be described with reference to FIGS. As shown in FIGS. 1 and 2, the magnet generator 10 is an outer rotor type magnet AC generator, and includes a stator 11, a rotor 15, and a crank position sensor 26. The stator 11 is attached to the engine cover 5 by mounting bolts 27 and includes a stator core assembly 12, a bobbin 13, and a coil 14.
　本実施形態では、１２個のコイル１４がステータ１１の軸心まわりの周方向へ並ぶように配置されている。以下の説明において、「周方向」とは、ステータ１１の軸心まわりの周方向のことである。コイル１４への配線は、ケーブル２８を経由してコネクタ２９に電気的に接続されている。コネクタ２９には、クランク位置センサ２６からの信号線も接続されている。 In the present embodiment, twelve coils 14 are arranged in the circumferential direction around the axis of the stator 11. In the following description, “circumferential direction” refers to a circumferential direction around the axis of the stator 11. The wiring to the coil 14 is electrically connected to the connector 29 via the cable 28. A signal line from the crank position sensor 26 is also connected to the connector 29.
　ロータ１５は、ロータボディ１６、及び、エンジンのクランクシャフト６に取り付けるための取付孔２４を含むロータベース２３から構成されている。ロータボディ１６は、筒部１７及び底部１８からなるカップ状であり鉄などで構成される。筒部１７は、ステータ１１に対し径方向外側に配置されている。筒部１７の内壁には、径方向内側の極性がＮ極の第１磁石１９と、径方向内側の極性がＳ極の第２磁石２１とが周方向に交互に取り付けられている。また、筒部１７の外壁には、エンジンのクランク位置を検出するためのクランク位置検出部２２が設けられており、クランク位置センサ２６がクランク位置検出部２２を検出することによって、ロータ１５の回転状態を検出可能である。 The rotor 15 includes a rotor body 16 and a rotor base 23 including an attachment hole 24 for attachment to the crankshaft 6 of the engine. The rotor body 16 has a cup shape including a cylindrical portion 17 and a bottom portion 18 and is made of iron or the like. The cylindrical portion 17 is disposed on the radially outer side with respect to the stator 11. On the inner wall of the cylindrical portion 17, first magnets 19 having a radially inner polarity of N poles and second magnets 21 having a radially inner polarity of S poles are alternately attached in the circumferential direction. Further, a crank position detection unit 22 for detecting the crank position of the engine is provided on the outer wall of the cylinder portion 17, and the rotation of the rotor 15 is detected by the crank position sensor 26 detecting the crank position detection unit 22. The state can be detected.
　ロータベース２３は、ロータボディ１６の底部１８に締結され、中央部に取付孔２４およびキー溝２５が形成されている。この取付孔２４およびキー溝２５にエンジンのクランクシャフト６が直結されることによって、ロータ１５はクランクシャフト６と一体に回転する。
　ロータ１５が回転すると、コイル１４の周囲の磁極が連続的に変化し、この磁極の変化によってコイル１４に誘導起電力が発生する。この誘導起電力は、コイル１４の配線や磁極配置によって単相として出力される。 The rotor base 23 is fastened to the bottom 18 of the rotor body 16, and an attachment hole 24 and a key groove 25 are formed at the center. When the crankshaft 6 of the engine is directly connected to the mounting hole 24 and the keyway 25, the rotor 15 rotates integrally with the crankshaft 6.
When the rotor 15 rotates, the magnetic pole around the coil 14 continuously changes, and an induced electromotive force is generated in the coil 14 due to the change in the magnetic pole. This induced electromotive force is output as a single phase by the wiring of the coil 14 and the magnetic pole arrangement.
　次に、ステータコアＡｓｓｙ１２について図３から図７を参照して詳細な構成を説明する。図３に示すように、ステータコアＡｓｓｙ１２は、取付部３０およびステータコア４０を有している。
　取付部３０は、ステータコア４０の内壁に例えば圧入によって固定されている環状部材であり、取付ボルト２７（図１参照）が挿通可能な複数の取付孔３１、および、配線のための端子を通す端子孔３２を有している。 Next, a detailed configuration of the stator core Assy 12 will be described with reference to FIGS. As shown in FIG. 3, the stator core Assy 12 has a mounting portion 30 and a stator core 40.
The mounting portion 30 is an annular member fixed to the inner wall of the stator core 40 by, for example, press fitting, and a plurality of mounting holes 31 through which mounting bolts 27 (see FIG. 1) can be inserted, and terminals through which terminals for wiring pass. A hole 32 is provided.
　ステータコア４０は、環状のヨーク４１と、ヨーク４１から放射状に延びている複数のティース４２とを有している。本実施形態では、ティース４２の数は１２個である。各ティース４２には、コイル１４が巻回されている。本実施形態では、コイル１４は、ティース４２に設けられているボビン１３に集中巻きにて巻回されている。 The stator core 40 has an annular yoke 41 and a plurality of teeth 42 extending radially from the yoke 41. In the present embodiment, the number of teeth 42 is twelve. A coil 14 is wound around each tooth 42. In the present embodiment, the coil 14 is wound around the bobbin 13 provided on the tooth 42 by concentrated winding.
　ステータコア４０は、コアエレメントＡｓｓｙ（アセンブリ）４４が周方向へ複数並べられることによって形成されている。本実施形態では、コアエレメントＡｓｓｙ４４は、ティース４２の数と同じ１２個設けられている。ロータの磁極が１２極の場合には単相発電機とすることができる。図５に示すように、コアエレメントＡｓｓｙ４４は、複数のＵ字形のコアエレメント４５～４９の積層体から構成されている。 The stator core 40 is formed by arranging a plurality of core elements Assy (assemblies) 44 in the circumferential direction. In the present embodiment, twelve core elements Assy 44 are provided as many as the number of teeth 42. When the rotor has 12 magnetic poles, a single-phase generator can be used. As shown in FIG. 5, the core element Assy 44 is composed of a stacked body of a plurality of U-shaped core elements 45 to 49.
　図６に示すように、一つのコアエレメント４５は、板材をＵ字形に曲げて形成されており、第１板部５１、第２板部６１および接続部７１を有している。第１板部５１は、径方向へ延びている巻き部７６、および、巻き部７６の先端から軸方向へ突き出している鍔部７７を有している。なお、鍔部７７は「第１鍔部」に相当する。より多くの磁束をコイル巻線部へ導くために、巻き部７６の軸方向幅Ｗ１よりも鍔部７７の軸方向幅Ｗ２の方を大きくしてある。また、残りのコアエレメント４５～４９についても同様に第１板部５２～５５、第２板部６２～６５、および接続部７２～７５を有している。 As shown in FIG. 6, one core element 45 is formed by bending a plate material into a U shape, and includes a first plate portion 51, a second plate portion 61, and a connection portion 71. The first plate portion 51 has a winding portion 76 extending in the radial direction and a flange portion 77 protruding in the axial direction from the tip of the winding portion 76. Note that the collar portion 77 corresponds to a “first collar portion”. In order to guide more magnetic flux to the coil winding portion, the axial width W2 of the flange portion 77 is made larger than the axial width W1 of the winding portion 76. Similarly, the remaining core elements 45 to 49 have first plate portions 52 to 55, second plate portions 62 to 65, and connection portions 72 to 75, respectively.
　コアエレメントＡｓｓｙ４４は、図５に示すように、コアエレメント４５～４９の接続部７１～７５が径方向へ積層されるように、かつ、コアエレメント４５～４９の第１板部５１～５５および第２板部６１～６５が周方向へ積層されるように、図７に示すように組み合わされている。 As shown in FIG. 5, the core element Assy 44 is configured such that the connection portions 71 to 75 of the core elements 45 to 49 are stacked in the radial direction, and the first plate portions 51 to 55 and the first plate portions 51 to 55 of the core elements 45 to 49 are arranged. The two plate portions 61 to 65 are combined as shown in FIG. 7 so as to be laminated in the circumferential direction.
　図５に示すように、コアエレメント４５～４９の接続部７１～７５は、径方向外側に位置するものほど周方向長さが短く形成され積層できるようにしている。また、コアエレメント４５～４９の第１板部５１～５５および第２板部６１～６５は、コアエレメントＡｓｓｙ４４において周方向の内側に位置するものほど径方向長さが短く形成されて積層できるようにしている。 As shown in FIG. 5, the connecting portions 71 to 75 of the core elements 45 to 49 are formed such that the ones located on the outer side in the radial direction have a shorter circumferential length and can be stacked. In addition, the first plate portions 51 to 55 and the second plate portions 61 to 65 of the core elements 45 to 49 are formed such that the one located closer to the inner side in the circumferential direction in the core element Assy 44 has a shorter radial direction and can be stacked. I have to.
　このようにして構成されたステータコア４０では、ティース４２は、周方向へ積層された第１板部５１～５５および第２板部６１～６５から構成されている。本実施形態では、ティース４２は、周方向の一方側が第２板部６１～６５から構成され、周方向の他方側が第１板部５１～５５から構成されている。 In the stator core 40 thus configured, the teeth 42 are composed of the first plate portions 51 to 55 and the second plate portions 61 to 65 stacked in the circumferential direction. In the present embodiment, the teeth 42 are configured by the second plate portions 61 to 65 on one side in the circumferential direction and the first plate portions 51 to 55 on the other side in the circumferential direction.
　また、ヨーク４１は、周方向で隣り合う２つのティース４２のうち一方のティース４２に含まれる第１板部５１～５５と他方のティース４２に含まれる第２板部６１～６５とを接続している接続部７１～７５から構成されている。第１板部５１～５５、第２板部６１～６５、および接続部７１～７５は、同一の部材でかつ、一体的に構成されている。 The yoke 41 connects the first plate portions 51 to 55 included in one of the two teeth 42 adjacent in the circumferential direction to the second plate portions 61 to 65 included in the other tooth 42. The connection parts 71 to 75 are configured. The first plate portions 51 to 55, the second plate portions 61 to 65, and the connection portions 71 to 75 are the same member and are integrally configured.
　また、コアエレメント４５の第１板部５１に沿う仮想的な直線を第１仮想直線Ｌ１とし、第２板部６１に沿う仮想的な直線を第２仮想直線Ｌ２とすると、第１仮想直線Ｌ１と第２仮想直線Ｌ２との交点Ｐは、接続部７１に対し軸心ＡＸ側に位置している。本実施形態では、交点Ｐは軸心ＡＸと一致している。これによって、各ティース４２は、径方向外側に向かうほど周方向間隔が大きくなっている。 Further, if a virtual straight line along the first plate portion 51 of the core element 45 is a first virtual straight line L1, and a virtual straight line along the second plate portion 61 is a second virtual straight line L2, the first virtual straight line L1. And the second virtual straight line L2 are located on the axis AX side with respect to the connecting portion 71. In the present embodiment, the intersection point P coincides with the axis AX. As a result, each tooth 42 has a larger circumferential interval toward the radially outer side.
　図５に示すように、ステータコア４０を軸方向から見たとき、ティース４２の先端面７８は、軸心ＡＸと同心の仮想的な円筒面である仮想円筒面７９にほぼ沿う円弧状になるように各コアエレメントの長さを設定している。本実施形態では、第１板部５１～５５および第２板部６１～６５の端面は、第１板部５１～５５の第２板部６１～６５の延伸方向にほぼ垂直な平面であり、第１板部５１～５５および第２板部６１～６５の径方向長さが適宜調節されることによって、ティース４２の先端面７８を円弧状に形成している。 As shown in FIG. 5, when the stator core 40 is viewed from the axial direction, the front end surface 78 of the tooth 42 has an arc shape that substantially follows a virtual cylindrical surface 79 that is a virtual cylindrical surface concentric with the axial center AX. Is set to the length of each core element. In the present embodiment, the end surfaces of the first plate portions 51 to 55 and the second plate portions 61 to 65 are planes substantially perpendicular to the extending direction of the second plate portions 61 to 65 of the first plate portions 51 to 55, By appropriately adjusting the radial lengths of the first plate portions 51 to 55 and the second plate portions 61 to 65, the tip surface 78 of the tooth 42 is formed in an arc shape.
　（効果）
　第１実施形態の磁石式発電機１０の効果について説明する。
　（１）ステータコア４０のティース４２は、軸心ＡＸまわりの周方向へ積層されている第１板部５１～５５および第２板部６１～６５から構成され、ヨーク４１は、周方向で隣り合う２つのティース４２のうち一方のティース４２に含まれる第１板部５１～５５と他方のティース４２に含まれる第２板部６１～６５とを接続している接続部７１～７５から構成されているので、磁束がティース４２を径方向へ流れるときの磁気抵抗と比べて、磁束がティース４２を周方向へ流れるときの磁気抵抗を大きくすることができる。そのため、ロータ１５からステータコア４０のティース４２に入る磁束が周方向へ流れにくくなり、磁束が短絡しにくくなる。したがって、コイルに流れる有効磁束が減少するのを抑制し磁石式発電機１０の出力低下を抑制することが可能である。更に、ロータ１５の第１磁極と第２磁極をそれぞれの磁石で構成したので、磁石間の微少な隙間をティース部の板厚以上に設定してあるため周方向での磁気短絡が少なくでき、磁石式発電機１０の出力低下を抑制することができる。 (effect)
The effect of the magnet generator 10 of 1st Embodiment is demonstrated.
(1) The teeth 42 of the stator core 40 are composed of first plate portions 51 to 55 and second plate portions 61 to 65 stacked in the circumferential direction around the axis AX, and the yokes 41 are adjacent in the circumferential direction. Of the two teeth 42, the first plate portions 51 to 55 included in one of the teeth 42 and the connection portions 71 to 75 connecting the second plate portions 61 to 65 included in the other tooth 42 are configured. Therefore, the magnetic resistance when the magnetic flux flows through the teeth 42 in the circumferential direction can be made larger than the magnetic resistance when the magnetic flux flows through the teeth 42 in the radial direction. Therefore, the magnetic flux entering the teeth 42 of the stator core 40 from the rotor 15 is less likely to flow in the circumferential direction, and the magnetic flux is less likely to be short-circuited. Therefore, it is possible to suppress a decrease in the effective magnetic flux flowing through the coil and to suppress a decrease in the output of the magnet generator 10. Furthermore, since the first magnetic pole and the second magnetic pole of the rotor 15 are composed of the respective magnets, the magnetic gap in the circumferential direction can be reduced because the minute gap between the magnets is set to be equal to or greater than the plate thickness of the teeth portion, A decrease in output of the magnet generator 10 can be suppressed.
　また、ロータ１５からステータコア４０のティース４２の第１板部５１に入る磁束は、その第１板部５１と同一部材でかつ一体的である接続部７１と第２板部６１とを順に通ってロータ１５に入る。その他の板部においても同様である。そのため、ティース４２とヨーク４１との接続箇所の磁気抵抗増加を抑えることができ、磁石式発電機１０の出力低下を抑制可能である。 Further, the magnetic flux entering the first plate portion 51 of the teeth 42 of the stator core 40 from the rotor 15 sequentially passes through the connection portion 71 and the second plate portion 61 that are the same member and integral with the first plate portion 51. Enter the rotor 15. The same applies to the other plate portions. Therefore, an increase in magnetic resistance at the connection portion between the teeth 42 and the yoke 41 can be suppressed, and a decrease in the output of the magnet generator 10 can be suppressed.
　（２）コアエレメント４５～４９は、比較的小型の板材をＵ字形に曲げて形成されている。そのため、コアエレメント４５～４９を製造するとき小型のプレス機を使用することが出来るので設備費を最小限に抑えることができる。また、プレス加工によって比較的安価にかつ大量にコアエレメント４５～４９を製造可能である。 (2) The core elements 45 to 49 are formed by bending a relatively small plate material into a U shape. Therefore, when manufacturing the core elements 45 to 49, a small press can be used, so that the equipment cost can be minimized. In addition, the core elements 45 to 49 can be manufactured relatively inexpensively and in large quantities by pressing.
　（３）ティース４２は、周方向の一方側が第２板部６１～６５から構成され、周方向の他方側が第１板部５１～５５から構成されている。そのため、ロータ１５からティース４２に入った磁束を周方向の一方側に隣接するティース４２に流す磁気回路と、ロータ１５からティース４２に入った磁束を周方向の他方側に隣接するティース４２に流す磁気回路と、を形成することができる。 (3) The teeth 42 are composed of the second plate portions 61 to 65 on one side in the circumferential direction and the first plate portions 51 to 55 on the other side in the circumferential direction. Therefore, the magnetic circuit that flows the magnetic flux that has entered the teeth 42 from the rotor 15 to the teeth 42 adjacent to one side in the circumferential direction, and the magnetic flux that has entered the teeth 42 from the rotor 15 to the teeth 42 adjacent to the other side in the circumferential direction. And a magnetic circuit.
　（４）ヨーク４１は、径方向に積層されたコアエレメント４５～４９の接続部７１～７５から構成されている。これにより、第１板部５１～５５および第２板部６１～６５を周方向へ積層させてティース４２を構成することができる。 (4) The yoke 41 is composed of connecting portions 71 to 75 of core elements 45 to 49 stacked in the radial direction. Accordingly, the teeth 42 can be configured by laminating the first plate portions 51 to 55 and the second plate portions 61 to 65 in the circumferential direction.
　（５）第１仮想直線Ｌ１と第２仮想直線Ｌ２との交点Ｐは、接続部７１に対し軸心ＡＸ側に位置している。これによって、Ｕ字形状に曲げる時の角度を大きくすることが出来る為、曲げ加工が容易となる。また、隣接するティース４２の周方向間隔を、径方向外側に向かうほど大きくすることができる。そのため、コイル１４をティース４２に巻回し易くなる。 (5) The intersection P between the first virtual straight line L1 and the second virtual straight line L2 is located on the axis AX side with respect to the connecting portion 71. As a result, the angle at the time of bending into a U-shape can be increased, which facilitates bending. Moreover, the circumferential direction space | interval of the adjacent teeth 42 can be enlarged, so that it goes to radial direction outer side. Therefore, it becomes easy to wind the coil 14 around the teeth 42.
　（６）第１板部５１～５５の巻き部７６の軸方向幅Ｗ１は、鍔部７７の軸方向幅Ｗ２よりも小さい。そのため、ロータ１５の磁極と対向するティース４２の先端面７８の面積を大きくしつつも、巻き部７６にボビン１３を介して巻回されるコイル１４の外径を小さくすることができる。そのため、ステータコア４０が軸方向へコンパクトになるとともに、周方向の磁気短絡を抑制しつつ、鍔部が長くなった分でより多くの磁束を導入することができ磁石式発電機１０の出力を高めることができる。 (6) The axial width W1 of the winding portion 76 of the first plate portions 51 to 55 is smaller than the axial width W2 of the flange portion 77. Therefore, it is possible to reduce the outer diameter of the coil 14 wound around the winding portion 76 via the bobbin 13 while increasing the area of the tip surface 78 of the tooth 42 facing the magnetic pole of the rotor 15. Therefore, the stator core 40 becomes compact in the axial direction, and more magnetic flux can be introduced by increasing the length of the flange while suppressing the magnetic short circuit in the circumferential direction, and the output of the magnet generator 10 is increased. be able to.
　（７）ティース４２の先端面７８は、軸心ＡＸと同心の仮想的な円筒面である仮想円筒面７９に沿う円弧状である。そのため、ロータ１５とステータコア４０との間の隙間を周方向で均一にすることができ磁石式発電機１０の出力を最大化できるとともに、ロータ１５とステータ１１の接触不具合を防止することができる。 (7) The tip surface 78 of the tooth 42 has an arc shape along a virtual cylindrical surface 79 which is a virtual cylindrical surface concentric with the axis AX. Therefore, the gap between the rotor 15 and the stator core 40 can be made uniform in the circumferential direction, and the output of the magnet generator 10 can be maximized, and the contact failure between the rotor 15 and the stator 11 can be prevented.
　（第２実施形態）
　第２実施形態によるステータコアについて図８、図９を参照して説明する。第２実施形態では、ステータコア８０のティース８１を構成する複数の板部のうち周方向の端に位置する第１板部８２および第２板部８３は、ティース８１の先端部分で周方向へ突き出している鍔部８４、８５を有している。鍔部８４、８５は、板材からコアエレメント８６を作るとき成形される。なお、第１板部８２および第２板部８３は「特定板部」に相当し、鍔部８４、８５は「第２鍔部」に相当する。 (Second Embodiment)
A stator core according to the second embodiment will be described with reference to FIGS. In the second embodiment, the first plate portion 82 and the second plate portion 83 located at the circumferential ends of the plurality of plate portions constituting the teeth 81 of the stator core 80 protrude in the circumferential direction at the tip portions of the teeth 81. It has the collar parts 84 and 85 which are. The flange portions 84 and 85 are formed when the core element 86 is made from a plate material. The first plate portion 82 and the second plate portion 83 correspond to “specific plate portions”, and the flange portions 84 and 85 correspond to “second flange portions”.
　ステータコア８０は、コアエレメント４５～４９、８６の積層体から構成されているコアエレメントＡｓｓｙ８８が周方向へ複数並べられることによって形成されている。
　第２実施形態によれば、第１実施形態と同様の効果を得ることができ、さらに、ロータの磁極と対向するティース８１の先端面８７の面積を増やすことができる。これにより、ロータとステータコア８０との間の磁気抵抗が小さくなり、発電の損失を減らすことができる。 The stator core 80 is formed by arranging a plurality of core elements Assy 88 formed of a laminated body of core elements 45 to 49, 86 in the circumferential direction.
According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the area of the tip end surface 87 of the tooth 81 facing the magnetic pole of the rotor can be increased. As a result, the magnetic resistance between the rotor and the stator core 80 is reduced, and power generation loss can be reduced.
　（他の実施形態）
　本発明の他の実施形態では、コアエレメントは、接続部が径方向に積層されなくてもよい。つまり、ティースは、周方向の一方側が１つの第２板部から構成され、周方向の他方側が１つの第１板部から構成されてもよい。要するに、ティースは、２つ以上の板部が周方向で積層されていればよい。
　本発明の他の実施形態では、コアエレメントの板部は、鍔部を有していなくてもよい。つまり、板部は、基端から先端まで幅が一定であってもよい。
　本発明の他の実施形態では、ティースの先端面は、例えば機械加工等により滑らかな曲面に成形されてもよい。これにより、ロータとティースとの隙間をより均一にすることができる。
　本発明の他の実施形態では、ティースの先端面は、平面であってもよい。 (Other embodiments)
In another embodiment of the present invention, the core element may not have the connecting portion laminated in the radial direction. In other words, the teeth may be configured by one second plate portion on one side in the circumferential direction and one first plate portion on the other side in the circumferential direction. In short, it is sufficient that two or more plate portions are laminated in the circumferential direction in the teeth.
In another embodiment of the present invention, the plate portion of the core element may not have a flange portion. That is, the width of the plate portion may be constant from the proximal end to the distal end.
In another embodiment of the present invention, the tip end surface of the teeth may be formed into a smooth curved surface by, for example, machining. Thereby, the clearance gap between a rotor and teeth can be made more uniform.
In another embodiment of the present invention, the tip surface of the tooth may be a flat surface.
　本発明の他の実施形態では、ティースの数は、１１個以下または１３個以上であってもよい。
　本発明の他の実施形態では、コイルは、集中巻き以外の例えば分布巻きによって巻回されてもよい。
　本発明の他の実施形態では、ステータコアは、アウターロータに対応するものに限らず、インナーロータに対応するものであってもよい。つまり、ステータロータのティースは、環状のヨークから径方向内側に延びているものであってもよい。
　本発明の他の実施形態では、ロータの第１磁極および第２磁極は、同一の磁石にそれぞれの極性を着磁して構成してもよい。
　本発明の他の実施形態では、ステータコアは、二輪車用の交流発電機に限らず、各種用途の発電機、あるいはブラシレスモータ等の電動機に適用されてもよい。
　本発明は、上述した実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲で種々の形態で実施可能である。 In another embodiment of the present invention, the number of teeth may be 11 or less, or 13 or more.
In other embodiments of the present invention, the coil may be wound by distributed winding other than concentrated winding, for example.
In another embodiment of the present invention, the stator core is not limited to one corresponding to the outer rotor, but may be one corresponding to the inner rotor. That is, the teeth of the stator rotor may extend radially inward from the annular yoke.
In another embodiment of the present invention, the first magnetic pole and the second magnetic pole of the rotor may be configured by magnetizing the same magnet with respective polarities.
In another embodiment of the present invention, the stator core is not limited to an AC generator for a motorcycle, but may be applied to a generator for various uses or an electric motor such as a brushless motor.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.
　１０・・・発電機（回転電機）
　１４・・・コイル
　４０、８０・・・ステータコア
　４１・・・ヨーク
　４２、８１・・・ティース
　５１、５２、５３、５４、５５、８２・・・第１板部（板部）
　６１、６２、６３、６４、６５、８３・・・第１板部（板部）
　７１、７２、７３、７４、７５・・・接続部
　ＡＸ・・・軸心 10 ... Generator (rotary electric machine)
14 ... Coil 40, 80 ... Stator core 41 ... Yoke 42, 81 ... Teeth 51, 52, 53, 54, 55, 82 ... First plate (plate)
61, 62, 63, 64, 65, 83 ... 1st plate part (plate part)
71, 72, 73, 74, 75 ... connection part AX ... axial center

Claims (9)

  1. 　環状のヨーク（４１）、および、前記ヨークから放射状に延びている複数のティース（４２、８１）を有し、各前記ティースにコイル（１４）を巻回可能な回転電機（１０）用のステータコア（４０、８０）であって、
    　前記ティースは、前記ヨークの軸心（ＡＸ）まわりの周方向へ積層されている複数の板部（５１、５２、５３、５４、５５、６１、６２、６３、６４、６５、８２、８３）から構成され、
    　前記ヨークは、周方向で隣り合う２つの前記ティースのうち一方のティースに含まれる前記板部と他方のティースに含まれる前記板部とを接続し、当該両板部と同一の部材から構成されている接続部（７１、７２、７３、７４、７５）を有することを特徴とするステータコア。     A stator core for a rotating electrical machine (10) having an annular yoke (41) and a plurality of teeth (42, 81) extending radially from the yoke and capable of winding a coil (14) around each of the teeth. (40, 80),
    The teeth are a plurality of plates (51, 52, 53, 54, 55, 61, 62, 63, 64, 65, 82, 83) that are stacked in the circumferential direction around the axis (AX) of the yoke. Consisting of
    The yoke connects the plate part included in one of the two teeth adjacent to each other in the circumferential direction and the plate part included in the other tooth, and is composed of the same member as the two plate parts. A stator core having a connecting portion (71, 72, 73, 74, 75).
  2. 　前記接続部、および、当該接続部に接続されている２つの前記板部は、板材を曲げて形成されたコアエレメント（４５、４６、４７、４８、４９、８６）を構成していることを特徴とする請求項１に記載のステータコア。 The connecting portion and the two plate portions connected to the connecting portion constitute a core element (45, 46, 47, 48, 49, 86) formed by bending a plate material. The stator core according to claim 1.
  3. 　前記コアエレメントは、周方向に並ぶように複数設けられており、
    　前記コアエレメントが有する２つの前記板部のうち、周方向の一方に位置する方を第１板部（５１、５２、５３、５４、５５、８２）とし、周方向の他方に位置する方を第２板部（６１、６２、６３、６４、６５、８３）とすると、前記ティースは、周方向の一方側が前記第２板部から構成され、周方向の他方側が前記第１板部から構成されていることを特徴とする請求項２に記載のステータコア。     A plurality of the core elements are provided so as to be arranged in the circumferential direction,
    Of the two plate portions of the core element, the one located in one of the circumferential directions is the first plate portion (51, 52, 53, 54, 55, 82), and the one located in the other circumferential direction Assuming that the second plate portion (61, 62, 63, 64, 65, 83) is used, the teeth are constituted by the second plate portion on one side in the circumferential direction and the first plate portion on the other side in the circumferential direction. The stator core according to claim 2, wherein the stator core is formed.
  4. 　前記コアエレメントは、複数の前記接続部が径方向に積層されるように、複数設けられており、
    　前記ティースは、周方向の一方側が複数の前記第２板部から構成され、周方向の他方側が複数の前記第１板部から構成されていることを特徴とする請求項３に記載のステータコア。     A plurality of the core elements are provided such that a plurality of the connection portions are stacked in the radial direction,
    4. The stator core according to claim 3, wherein one side of the teeth in the circumferential direction includes a plurality of the second plate portions, and the other side in the circumferential direction includes the plurality of first plate portions.
  5. 　前記回転電機はアウターロータ型であり、
    　前記コアエレメントの前記第１板部に沿う仮想的な直線を第１仮想直線（Ｌ１）とし、前記第２板部に沿う仮想的な直線を第２仮想直線（Ｌ２）とすると、前記第１仮想直線と前記第２仮想直線との交点（Ｐ）は、前記接続部に対し前記軸心側に位置することを特徴とする請求項３または４に記載のステータコア。     The rotating electrical machine is an outer rotor type,
    When a virtual straight line along the first plate portion of the core element is defined as a first virtual straight line (L1), and a virtual straight line along the second plate portion is defined as a second virtual straight line (L2), the first The stator core according to claim 3 or 4, wherein an intersection (P) between the virtual straight line and the second virtual straight line is located on the axial center side with respect to the connection portion.
  6. 　前記板部は、径方向へ延びている巻き部（７６）、および、当該巻き部の先端から前記ヨークの軸方向へ突き出している第１鍔部（７７）を有し、
    　前記巻き部の軸方向幅（Ｗ１）は、前記第１鍔部の軸方向幅（Ｗ２）よりも小さいことを特徴とする請求項１～５のいずれか一項に記載のステータコア。     The plate portion includes a winding portion (76) extending in the radial direction, and a first flange portion (77) protruding from the tip of the winding portion in the axial direction of the yoke,
    The stator core according to any one of claims 1 to 5, wherein an axial width (W1) of the winding portion is smaller than an axial width (W2) of the first flange portion.
  7. 　前記ティースの先端面（７８、８７）は、軸方向から見たとき円弧状であることを特徴とする請求項１～６のいずれか一項に記載のステータコア。 The stator core according to any one of claims 1 to 6, wherein the front end surfaces (78, 87) of the teeth have an arc shape when viewed from the axial direction.
  8. 　前記先端面は、前記ヨークの軸心と同心の仮想的な円筒面である仮想円筒面（７９）に沿う形状であることを特徴とする請求項７に記載のステータコア。 The stator core according to claim 7, wherein the tip surface has a shape along a virtual cylindrical surface (79) which is a virtual cylindrical surface concentric with the axis of the yoke.
  9. 　前記ティースを構成する複数の前記板部のうち周方向の端に位置するものを特定板部（８２、８３）とすると、当該特定板部は、前記ティースの先端部分で周方向へ突き出している第２鍔部（８４、８５）を有することを特徴とする請求項１～８のいずれか一項に記載のステータコア。 If the specific plate portion (82, 83) is the one located at the end in the circumferential direction among the plurality of plate portions constituting the tooth, the specific plate portion protrudes in the circumferential direction at the tip portion of the tooth. The stator core according to any one of claims 1 to 8, further comprising a second flange portion (84, 85).
PCT/JP2014/067380 2013-08-05 2014-06-30 Stator core WO2015019746A1 (en)

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JPH0654471A (en) * 1992-07-28 1994-02-25 Sankyo Seiki Mfg Co Ltd Armature of rotating electric machine
JPH1080116A (en) * 1996-07-08 1998-03-24 Toyota Motor Corp Reluctance motor

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JP4470249B2 (en) * 1999-11-22 2010-06-02 パナソニック株式会社 Electric motor and method of manufacturing stator core thereof
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