WO2015019746A1 - Noyau de stator - Google Patents

Noyau de stator 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
Authority
WO
WIPO (PCT)
Prior art keywords
teeth
stator core
circumferential direction
plate
yoke
Prior art date
Application number
PCT/JP2014/067380
Other languages
English (en)
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.)
Filing date
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/zh
Publication of WO2015019746A1 publication Critical patent/WO2015019746A1/fr

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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
    • H02K1/12—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

Selon l'invention, les dents (42) d'un noyau de stator (40) sont configurées à partir de premières parties plaque (51-55) et de secondes parties plaque (61-65) qui sont empilées dans la direction circonférentielles, et une culasse (41) est configurée à partir de parties de liaison (71-75) qui relient les premières parties plaque (51-55) incluses dans l'une de deux dents adjacentes (42) et les secondes parties plaque (61-65) incluses dans l'autre des deux dents adjacentes (42). En conséquence, la résistance magnétique est plus grande quand le flux magnétique circule dans la direction circonférentielle dans les dents (42) que quand le flux magnétique circule dans la direction radiale dans les dents (42), de manière que le flux magnétique pénétrant dans les dents (42) en provenance du rotor (15) soit moins susceptible d'être court-circuité dans la direction circonférentielle. En outre, le flux magnétique pénétrant dans la première partie plaque (51) des dents (42) en provenance du rotor (15) passe successivement dans la partie de liaison (71) et la seconde partie plaque (61), qui sont faites du même matériau que la première partie plaque (51), et pénètre ensuite dans le rotor (15). En conséquence, la résistance magnétique du site de liaison entre les dents (42) et la culasse (41) est réduite au minimum autant que possible.
PCT/JP2014/067380 2013-08-05 2014-06-30 Noyau de stator WO2015019746A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480044160.4A CN105453386A (zh) 2013-08-05 2014-06-30 定子铁心

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-162337 2013-08-05
JP2013162337A JP2015033254A (ja) 2013-08-05 2013-08-05 ステータコア

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WO2015019746A1 true WO2015019746A1 (fr) 2015-02-12

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PCT/JP2014/067380 WO2015019746A1 (fr) 2013-08-05 2014-06-30 Noyau de stator

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JP (1) JP2015033254A (fr)
CN (1) CN105453386A (fr)
WO (1) WO2015019746A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6517882B2 (ja) 2017-07-04 2019-05-22 ファナック株式会社 コア本体およびリアクトル
JP6633785B2 (ja) * 2019-01-17 2020-01-22 ファナック株式会社 コア本体、リアクトルおよび製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654471A (ja) * 1992-07-28 1994-02-25 Sankyo Seiki Mfg Co Ltd 回転電機の電機子
JPH1080116A (ja) * 1996-07-08 1998-03-24 Toyota Motor Corp リラクタンスモータ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1050239C (zh) * 1992-07-28 2000-03-08 株式会社三协精机制作所 旋转电机的电枢
JP4470249B2 (ja) * 1999-11-22 2010-06-02 パナソニック株式会社 電動機およびその固定子鉄心の製造方法
KR100600758B1 (ko) * 2004-09-15 2006-07-19 엘지전자 주식회사 모터의 스테이터 및 그 제조방법
JP5418150B2 (ja) * 2009-10-30 2014-02-19 株式会社デンソー 回転電機用のステータ及びその製造方法並びに回転電機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0654471A (ja) * 1992-07-28 1994-02-25 Sankyo Seiki Mfg Co Ltd 回転電機の電機子
JPH1080116A (ja) * 1996-07-08 1998-03-24 Toyota Motor Corp リラクタンスモータ

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CN105453386A (zh) 2016-03-30
JP2015033254A (ja) 2015-02-16

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