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WO2015093157A1 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
WO2015093157A1
WO2015093157A1 PCT/JP2014/079013 JP2014079013W WO2015093157A1 WO 2015093157 A1 WO2015093157 A1 WO 2015093157A1 JP 2014079013 W JP2014079013 W JP 2014079013W WO 2015093157 A1 WO2015093157 A1 WO 2015093157A1
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WO
WIPO (PCT)
Prior art keywords
bobbin
winding
diameter side
coil
inner diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/079013
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French (fr)
Japanese (ja)
Inventor
中山　賢治
金澤　宏至
濱田　泰久
省三 川崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems Ltd
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Filing date
Publication date
Application filed by Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Priority to JP2015553415A priority Critical patent/JPWO2015093157A1/en
Publication of WO2015093157A1 publication Critical patent/WO2015093157A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores 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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores

Definitions

  • the present invention relates to a bobbin structure in which coil windings are concentratedly wound on a stator used in a rotating electric machine, and a winding structure.
  • Patent Document 1 a groove for dropping the first winding coil is formed in the winding portion of the axial end face of the bobbin, and winding is performed using a step with the axial end face of the bobbin formed by winding the coil in the groove.
  • a structure for guiding lines is disclosed.
  • Patent Document 2 a chamfered portion provided on both end surfaces of the flange portion of the bobbin and an inclined portion which gradually decreases in height toward the outer diameter side of the bobbin are provided on the axial end surface of the bobbin to induce the winding.
  • Patent Document 3 discloses a structure in which a step portion is provided on an end surface in the axial direction of a bobbin and a winding is guided by a coil wound around the step portion.
  • the outer diameter and inner diameter shape that determine the magnetic circuit width of the outer diameter side flange portion of the stator are formed in an arc shape so that the magnetic circuit width is uniform, and a stator structure that does not cause waste in the winding area and
  • the shape of the bobbin that fits to the inner diameter side of the outer flange side of the stator is configured in an arc shape so as to follow it, so that the winding area is not wasted, and the magnetic circuit and winding area are A structure that can be used effectively and optimally.
  • an inclined part that gradually decreases in height toward the outer diameter side of the bobbin is provided on the axial end surface of the bobbin in accordance with the coil track during winding, and the coil is wound with winding tension by using the inclined part.
  • the inclined part where the coil is induced has a smooth inclined structure composed of R in order to prevent the coil coating from being damaged during induction.
  • the load that the winding tension gives to the bobbin flange part is provided in addition to holding the coil with R greater than the coil radius.
  • the structure can be reduced. Further, in order to realize an aligned winding that does not collapse, a structure is provided in which a protrusion for fixing the winding position is provided on the bobbin.
  • the outer diameter and the inner diameter of the outer diameter side flange portion of the stator are formed in an arc shape, and the magnetic circuit width can be made uniform to prevent the deterioration of the motor characteristics.
  • the area can be used to the maximum extent possible.
  • the bobbin shape fitted to the inner diameter side of the outer diameter side flange portion of the stator is also formed in an arc shape so as to learn from it, so that an effect of not generating waste in the winding area can be obtained.
  • the bobbin gradually from the portion on the inner diameter side of one or two coils from the outermost diameter side when the coil track at the time of winding enters from the side surface of the bobbin toward the outer diameter side gradually toward the axial end surface of the bobbin.
  • the slanted portion of the bobbin through which the coil is guided is smoothly configured with a semi-elliptical R surface, so that the effect of preventing the coil coating from being damaged during coil induction can be obtained.
  • Example 1 (a) Front view of stator, (b) Front view of stator showing conventional example Example 1 (a) Back view of bobbin, (b) Front view of bobbin, (c) Cross section of bobbin Example 1 (a) Perspective view of stator and bobbin, (a) Front view of stator and bobbin Round wire coil winding perspective view of Example 1
  • An embodiment according to the present invention includes a stator core structure and a bobbin structure for winding a coil of an in-vehicle rotating electrical machine, and a coil winding structure, and an outer diameter side constituting a magnetic circuit width on the outer diameter side of the stator core; By configuring the inner diameter side in an arc shape, it is possible to expect an effect of obtaining a magnetic circuit width that is uniform in width and does not generate a useless space in the winding area.
  • the bobbin stator mating surface is also formed in an arc shape, so that the winding area 2e can be used to the maximum extent possible, and the cost can be reduced by increasing the winding space factor and improving motor performance. Possible effects are obtained.
  • a winding machine is provided by providing a taper surface on the surface of the winding portion of the bobbin that gradually decreases in height toward the bobbin flange, starting from a portion located on the inner diameter side of the coil diameter by one or two from the flange end surface. It is possible to automatically wind the coil outside the nozzle track by using the winding tension, and to realize a high space factor of the winding.
  • the coil surface of the bobbin is composed of ⁇ (arc) -shaped R, and the coil surface breakage is reduced by providing a semi-elliptical R on the tapered surface.
  • ⁇ (arc) -shaped R In order to be able to form a concave curved surface at the base of the flange, an R that is greater than the radius of the coil is provided, and a structure that can hold the first coil while reducing the load on the flange due to winding tension.
  • FIG. 1 shows an axial sectional view of an in-vehicle electric motor 100 which is an electric power steering motor.
  • a divided stator core 2 is press-fitted or shrink-fitted on the inner peripheral side of the housing 1 while maintaining a ring shape without welding or welding.
  • a bobbin 3 is attached to the stator core 2 and a coil 4 is wound around the outer periphery thereof.
  • the lead wire of the coil 4 is connected to a bus bar terminal 15 provided in the bus bar mold 14, and an end face of the bus bar terminal 15 is connected to an end face of a bus bar terminal 17 provided in another bus bar mold 16 by welding.
  • a rotor (rotor core 6) composed of a shaft 5, a magnet 7, and a magnet cover 8 is provided on the inner peripheral side of the stator core 2, and the rotor is supported by an F bearing 9 and an R bearing 10, and the F bearing 9 is fixed to the housing 1, and the R bearing 10 is fixed to the cover motor 13.
  • the cover motor 13 is provided with a through hole through which the bus bar terminal 15 passes, and is connected to the bus bar mold 16 by a screw 18.
  • the bus bar terminal 17 is wired so that the connection of each phase can be output in three phases, and is a UVW three-phase output.
  • the motor rotates by supplying power from the inverter to the three-phase output terminal 19.
  • the bearing structure that supports the rotation of the motor is set by press-fitting the inner ring of the F bearing 9 on the gear side of the shaft 5 and fixing the outer ring in the axial direction by the housing 1 and the tongue 12.
  • the inner ring of the R bearing 10 is press-fitted to the inverter side of the shaft 5, and the preload of the preload spring 11 pushes the outer ring of the R bearing 10 by the reaction force using the end face of the cover motor 13, and the preload is always applied to the inverter side. It has a structure. After the motor is assembled, preload is always generated from the tip of the shaft 5 toward the inverter side, and the gap between the inner and outer rings of the F bearing 9 and the R bearing 10 can be minimized. Therefore, it has a structure that suppresses the abnormal noise when the bearing rotates.
  • the stator core 2 is disposed on the outermost periphery.
  • the stator core 2 is composed of a T-shaped split core, and has a two-continuous winding structure in which one coil 4 is intensively wound around two teeth.
  • Each stator core 2 is connected in an annular shape by being welded to the outer periphery of the core back or fitted to the inner diameter of the housing 1 without welding.
  • the coil lead wire 4a is crimped to the bus bar terminal 15 provided in the bus bar mold 14, and then the coil lead wire 4a and the bus bar terminal 15 are welded to make electrical connection. Do.
  • the configuration of the stator and the configuration of the magnetic circuit will be described with reference to FIG.
  • the magnetic circuit width 2d on the outer diameter side of the stator core 2 can be obtained by forming the outer peripheral side and the inner peripheral side in a circular arc shape, so that a uniform magnetic circuit width 2d can be obtained, from the magnetic circuit inlet 2a to the magnetic circuit outlet 2b.
  • a uniform magnetic circuit width 2d can be obtained, from the magnetic circuit inlet 2a to the magnetic circuit outlet 2b.
  • the winding area 2e since the magnetic circuit width 2d is optimized, there is no need to generate a useless portion in the shape of the stator core 2, so that the winding area 2e can be widened and the winding area is increased. As a result, it is possible to reduce the thickness of the motor and the characteristics of the motor and reduce the thickness of the magnetic circuit. As a result, the cost of the motor can be reduced.
  • the configuration of the conventional stator and the configuration of the magnetic circuit will be described with reference to FIG.
  • the magnetic circuit width 2d on the outer diameter side of the stator core 2 has an arc shape on the outer peripheral side and a straight line on the inner peripheral side, so that a uniform magnetic circuit width 2d cannot be obtained. Since the magnetic circuit width 2d near 2b is narrow and the magnetic circuit width 2d near the center of the stator core 2 is wide, it becomes impossible to obtain a smooth magnetic circuit flow 2c from the magnetic circuit inlet 2a toward the magnetic circuit outlet 2b. In addition to the deterioration of the motor characteristics, in the winding area 2e, a useless portion is generated in the shape of the stator core 2 and the winding area 2e is narrowed. As a result, the cost increases.
  • the configuration of the bobbin 3 will be described with reference to FIG. Since the inner diameter side shape for determining the magnetic circuit width 2d of the stator core 2 described above is set in an arc shape, the stator fitting surface 3b formed on the flange 3a of the bobbin 3 also has an arc shape accordingly. By configuring, it is possible to obtain a structure that enables a high space factor.
  • FIG. 4 (b) shows a front view of the bobbin 3
  • FIG. 4 (c) shows a cross-sectional view of the bobbin 3.
  • a flange 3a is provided on the outer diameter side of the winding surface 3d of the bobbin 3, and flange end surfaces 3h are formed at both ends thereof.
  • the flange end face 3h is positioned at the outermost diameter nozzle track 3g of the winding machine that winds the coil 4, and the coil 4 is wound while the winding machine nozzle moves in parallel.
  • the coil 4 By providing a taper surface 3e composed of an R surface from the track 3g to the flange 3a side from the inner diameter side of the bobbin 3 by one or two widths of the coil 4 without damaging the coil coating,
  • the coil 4 automatically slides on the taper surface of the bobbin 3 by using the winding tension, and it is possible to wind the portion outside the nozzle track of the winding machine.
  • the space factor of the coil 4 can be improved, and further, by providing a concave curved surface 3f having a radius equal to or larger than the radius of the coil 4 at the portion where the base portion of the flange 3a of the bobbin 3 and the tapered surface 3e are connected.
  • the effect of reducing the load applied to the flange 3a of the bobbin 3 by the effect of holding the coil 4 of the winding and the winding tension can be obtained. Furthermore, by providing a claw portion 3c for fixing the winding position on the side surface of the bobbin 3, it is possible to obtain an effect of enabling an aligned winding that does not collapse, and the surface of the winding portion of the bobbin 3 By forming 3d with R and making it a bowl-shaped R, the contact surface between the coil 4 and the bobbin 3 is increased, and the stress generated in the coil 4 during winding is reduced, so that the coating of the coil 4 is reduced. Prevent damage. Furthermore, by forming a ridge-shaped R on the end face of the bobbin 3, it is possible to obtain an effect of making the winding while maintaining the adhesion between the bobbin 3 and the coil 4 without increasing the tension during coil winding. Can do.
  • FIG. 5 (a) and FIG. 5 (b) show a state where the stator core 2 and the bobbin 3 are assembled.
  • the assembly is inserted so that two bobbins 3 are reversed from the axial direction of the stator core 2, and the winding structure is such that concentrated winding is performed while the coil 4 is hooked on the winding surface 3 d, the concave curved surface 3 f, and the claw portion 3 c of the bobbin 3. It has become.
  • Fig. 6 shows the state after winding.
  • the coil 4 is slid on the taper surface 3e of the bobbin 3 to perform winding from a portion outside the nozzle track of the winding machine, and winding is performed while the coil 4 is hooked on the claw portion 3c of the bobbin 3.
  • the magnetic circuit width 2d of the stator core 2 in an arc shape, useless space of the magnetic circuit width 2d is eliminated, and the fitting surface 3b of the stator core 2 and the bobbin 3 is also configured in an arc shape.
  • the winding space 2e can be utilized to the maximum extent.
  • the bobbin 3 with a winding surface 3d and a claw portion 3c composed of a tapered surface 3e, a concave curved surface 3f, and R, the damage to the coating of the coil 4 is suppressed, and the flange 3a of the bobbin 3 is attached to the bobbin 3. It is possible to reduce the load and perform winding with a high space factor and no winding from the part outside the nozzle track of the winding machine.
  • the present invention can be used as a magnetic circuit structure, bobbin structure, and coil winding structure of in-vehicle rotating electrical machines such as brushless motors and various generators used in electric power steering motors.
  • SYMBOLS 100 Motor for motor vehicles, 1 ... Housing, 2 ... Stator core, 3 ... Bobbin, 4 ... Coil, ... 5 ... Shaft, 6 ... Rotor core, 7 ... Magnet, 8 ... Magnet cover, 9 ... F bearing, 10 ... R bearing , 11 ... Preload spring, 12 ... Tomewa, 13 ... Cover motor, 14 ... Busbar mold, 15 ... Busbar terminal, 16 ... Busbar mold, 17 ... Busbar terminal, 18 ... Screw, 19 ... Three-phase output terminal, 4a ... Coil opening 2a ... magnetic circuit outlet, 2c ... magnetic circuit flow, 2d ... magnetic circuit width, 2e ... winding area, 3a ...

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

An in-vehicle rotating electric machine (100) in which a concentrated winding is used has a bobbin (3) and a winding structure characterized as follows: The outer and inner diameter sides of the stator core (2), which constitute a magnetic circuit width (2d) on the outer diameter side of the stator (2), are formed in arc shapes so that the width dimension becomes uniform. The bobbin (3) has a stator fitting surface (3b) formed on the flange (3a) of the bobbin (3) in an arc shape and fitted to the inner diameter side of the stator core (2). A tapered surface (3e), the height of which gradually lowers from a flange end surface (3h) of the bobbin (3) toward the outer diameter side by setting the inner diameter side as a base point, is provided on a winding portion surface (3d) formed in an axial direction of the bobbin (3).

Description

回転電機Rotating electric machine

　本発明は、回転電機に用いる固定子にコイル巻線を集中巻するボビン構造及び、巻線構造に関するものである。 The present invention relates to a bobbin structure in which coil windings are concentratedly wound on a stator used in a rotating electric machine, and a winding structure.

　従来の技術として、以下の３件の文献がある。特許文献１はボビンの軸方向端面の巻線部に１巻目のコイルを落とし込む溝を形成し、溝にコイルを巻線する事によってできたボビンの軸方向端面との段差を利用して巻線を誘導する構造が開示されている。また、特許文献２にはボビンのフランジ部両端面に設けた面取り部とボビンの軸方向端面にボビン外径側に向かって次第に高さが低くなるような傾斜部を設けて巻線を誘導する構造が開示されている。特許文献３においてはボビンの軸方向端面に段差部を設け、段差部に巻かれたコイルで巻線を誘導する構造が開示されている。 There are the following three documents as conventional technology. In Patent Document 1, a groove for dropping the first winding coil is formed in the winding portion of the axial end face of the bobbin, and winding is performed using a step with the axial end face of the bobbin formed by winding the coil in the groove. A structure for guiding lines is disclosed. Further, in Patent Document 2, a chamfered portion provided on both end surfaces of the flange portion of the bobbin and an inclined portion which gradually decreases in height toward the outer diameter side of the bobbin are provided on the axial end surface of the bobbin to induce the winding. A structure is disclosed. Patent Document 3 discloses a structure in which a step portion is provided on an end surface in the axial direction of a bobbin and a winding is guided by a coil wound around the step portion.

特開２０１２－１５１９３２号公報JP 2012-151932 A 特開２００８－２２８４７１号公報JP 2008-228471 A 特開２００６－７４９４３号公報JP 2006-74943 A

　　これらの特許文献１、２、３に記載のものは、コイルとボビンの接触部にRが無く、巻線テンションがボビンのフランジ部及び溝、段差などによりできたエッジ部に負荷がかかる構造となり、巻線テンションでボビンが破損する事が考えられる。また、固定子の外径側フランジ部の磁気回路幅についての記載は無く、固定子の外径側フランジ部の外径、内径が供に円弧状ではない(磁気回路幅が均一ではない)固定子構造を取っており、固定子の巻線エリアに無駄が発生する構造となっている。更に、巻線位置を固定するための構造が無いため、巻崩れやすく、整列巻が困難になる事が考えられる。また、特許文献２に記載のものは、ボビンのフランジ部端面に設けた面取り部をガイドで直接コイルを誘導しているためボビンのフランジ部に直接巻線テンションがかかり、ボビンが破損しやすい構造となっている。さらにボビンのフランジ部端面に設けた面取り部のエッジ部でコイルを誘導する際にコイル被覆を損傷してしまう事が考えられる。 These patent documents 1, 2, and 3 have a structure in which there is no R at the contact portion between the coil and the bobbin, and the winding tension is applied to the edge portion formed by the flange portion, groove, step, etc. of the bobbin. The bobbin may be damaged by winding tension. Also, there is no description about the magnetic circuit width of the outer diameter side flange portion of the stator, and the outer diameter and inner diameter of the outer diameter side flange portion of the stator are not arcuate (the magnetic circuit width is not uniform). It has a child structure, and waste is generated in the winding area of the stator. Furthermore, since there is no structure for fixing the winding position, it is likely that the winding will be easily broken and it will be difficult to arrange the winding. In addition, since the coil described in Patent Document 2 directly guides the coil with a chamfered portion provided on the end surface of the flange portion of the bobbin, the winding tension is directly applied to the flange portion of the bobbin, and the bobbin is easily damaged. It has become. Furthermore, it is conceivable that the coil coating is damaged when the coil is guided at the edge portion of the chamfered portion provided on the end surface of the flange portion of the bobbin.

　そこで、本発明では固定子の外径側フランジ部の磁気回路幅を決める外径と内径形状を円弧状で構成し磁気回路幅を均一にして、巻線エリアに無駄が発生しない固定子構造とする事で、固定子の外径側フランジ部内径側と嵌合するボビンの形状もそれに習うように円弧状で構成して巻線エリアに無駄が発生しない構造とし、磁気回路、巻線エリアを最適に有効活用できる構造とした。 Accordingly, in the present invention, the outer diameter and inner diameter shape that determine the magnetic circuit width of the outer diameter side flange portion of the stator are formed in an arc shape so that the magnetic circuit width is uniform, and a stator structure that does not cause waste in the winding area and By doing so, the shape of the bobbin that fits to the inner diameter side of the outer flange side of the stator is configured in an arc shape so as to follow it, so that the winding area is not wasted, and the magnetic circuit and winding area are A structure that can be used effectively and optimally.

　更に、巻線時のコイル軌道に合せてボビンの軸方向端面にボビンの外径側に向かって次第に高さが低くなるような傾斜部を設け、傾斜部を利用してコイルを巻線テンションで誘導し巻線エリアの最外径側に自動で寄せる構造として、巻線機のノズル軌道外の部分にも巻線可能な構造とした。コイルが誘導される傾斜部は誘導時のコイル被覆破損を防止するために、Rで構成される滑らかな傾斜構造とした。 In addition, an inclined part that gradually decreases in height toward the outer diameter side of the bobbin is provided on the axial end surface of the bobbin in accordance with the coil track during winding, and the coil is wound with winding tension by using the inclined part. As a structure that guides and automatically moves to the outermost diameter side of the winding area, it is possible to wind the part outside the nozzle track of the winding machine. The inclined part where the coil is induced has a smooth inclined structure composed of R in order to prevent the coil coating from being damaged during induction.

　また、傾斜部で最外径側に誘導したコイルが当るボビンのフランジ部の付け根部分にコイルの半径以上のRを設けてコイルを保持すると供に、巻線テンションがボビンフランジ部に与える負荷を軽減できる構造とした。また、巻崩れしない整列巻線を実現するために、ボビンに巻線位置を固定するための突起を設ける構造とした。 Also, at the base of the flange part of the bobbin where the coil guided to the outermost diameter side in the inclined part hits, the load that the winding tension gives to the bobbin flange part is provided in addition to holding the coil with R greater than the coil radius. The structure can be reduced. Further, in order to realize an aligned winding that does not collapse, a structure is provided in which a protrusion for fixing the winding position is provided on the bobbin.

　本発明によれば、固定子の外径側フランジ部の外径と内径を円弧状で構成し磁気回路幅を均一にする事でモータ特性の悪化を防止する事ができると供に、巻線エリアを最大限有効に活用する事ができる。それに伴い固定子の外径側フランジ部内径側と嵌合するボビンの形状もそれに習うように円弧状で構成する事で巻線エリアに無駄が発生しない効果が得られる。 According to the present invention, the outer diameter and the inner diameter of the outer diameter side flange portion of the stator are formed in an arc shape, and the magnetic circuit width can be made uniform to prevent the deterioration of the motor characteristics. The area can be used to the maximum extent possible. Accordingly, the bobbin shape fitted to the inner diameter side of the outer diameter side flange portion of the stator is also formed in an arc shape so as to learn from it, so that an effect of not generating waste in the winding area can be obtained.

　更に、ボビンにおいて、巻線時のコイル軌道がボビン側面から入った際の最外径側よりもコイル１～２個分内径側の部分から、外径側に向かってボビンの軸方向端面に次第に高さが低くなる傾斜部を設ける事で、傾斜部を利用しコイルを巻線テンションで誘導し巻線エリアの最外径側に自動で寄せられる効果を得る事ができ、巻線の高占積率化、モータ性能を向上させることができる。 Further, in the bobbin, gradually from the portion on the inner diameter side of one or two coils from the outermost diameter side when the coil track at the time of winding enters from the side surface of the bobbin toward the outer diameter side gradually toward the axial end surface of the bobbin. By providing an inclined part with a lower height, the coil can be guided by winding tension using the inclined part and the effect of being automatically brought to the outermost diameter side of the winding area can be obtained. It is possible to improve the volume factor and the motor performance.

　更に、コイルが誘導されるボビンの傾斜部は半楕円状のR面で滑らかに構成する事で、コイル誘導時のコイル被覆破損を防止する効果を得る事ができる。 Furthermore, the slanted portion of the bobbin through which the coil is guided is smoothly configured with a semi-elliptical R surface, so that the effect of preventing the coil coating from being damaged during coil induction can be obtained.

　また、ボビンの傾斜部で最外径側に誘導したコイルが当る、ボビンのフランジ部の付け根部分にコイルの半径以上のRを設ける事で、１巻目のコイルを保持する効果及び巻線テンションでボビンのフランジ部分に与える負荷を軽減できる効果を得る事ができる。 In addition, the effect of holding the coil of the first winding and winding tension by providing an R greater than the radius of the coil at the base of the flange part of the bobbin where the coil guided to the outermost diameter side hits the inclined part of the bobbin With this, the effect of reducing the load applied to the flange portion of the bobbin can be obtained.

　更に、ボビンの側面に巻線位置を固定するための突起を設ける事で、巻崩れしない整列巻線が可能になる効果を得る事ができる。 Furthermore, by providing a protrusion for fixing the winding position on the side surface of the bobbin, it is possible to obtain an effect of enabling an aligned winding that does not collapse.

ＥＰＳモータの構成を説明する断面図Sectional drawing explaining the structure of an EPS motor 実施例１の回転子及び固定子の斜視図The perspective view of the rotor and stator of Example 1. 実施例１の（ａ）固定子の正面図、（ｂ）従来例を示す固定子の正面図Example 1 (a) Front view of stator, (b) Front view of stator showing conventional example 実施例１の（ａ）ボビンの背面図、（ｂ）ボビンの正面図、（ｃ）ボビンの断面図Example 1 (a) Back view of bobbin, (b) Front view of bobbin, (c) Cross section of bobbin 実施例１の（ａ）固定子とボビンの斜視図、（ａ）固定子とボビンの正面図Example 1 (a) Perspective view of stator and bobbin, (a) Front view of stator and bobbin 実施例１の丸線コイル巻線斜視図Round wire coil winding perspective view of Example 1

　本発明にかかる実施例は、車載用回転電機のコイルの巻線を行うためのステータコア構造及びボビン構造、コイルの巻線構造において、ステータコアの外径側の磁気回路幅を構成する外径側と内径側の形状を円弧状に構成する事で、幅寸法が均一で巻線エリアに無駄なスペースを発生させない磁気回路幅を得られる効果が期待できる。 An embodiment according to the present invention includes a stator core structure and a bobbin structure for winding a coil of an in-vehicle rotating electrical machine, and a coil winding structure, and an outer diameter side constituting a magnetic circuit width on the outer diameter side of the stator core; By configuring the inner diameter side in an arc shape, it is possible to expect an effect of obtaining a magnetic circuit width that is uniform in width and does not generate a useless space in the winding area.

　更に、ボビンのステータ嵌合面も円弧状に構成する事で、巻線エリア２ｅを最大限有効活用する事ができ、巻線の高占積率化とモータ性能の向上による低コスト化を実現可能な効果が得られる。 Furthermore, the bobbin stator mating surface is also formed in an arc shape, so that the winding area 2e can be used to the maximum extent possible, and the cost can be reduced by increasing the winding space factor and improving motor performance. Possible effects are obtained.

　また、ボビンの巻線部表面にフランジ端面からコイルの直径１～２個分内径側に位置する部分を基点として、ボビンのフランジに向かい次第に高さが低くなるテーパ面を設ける事で巻線機のノズル軌道外の部分にコイルを巻線テンションを利用して、自動で巻線をする事が可能になり、巻線の高占積率化を実現できる。 In addition, a winding machine is provided by providing a taper surface on the surface of the winding portion of the bobbin that gradually decreases in height toward the bobbin flange, starting from a portion located on the inner diameter side of the coil diameter by one or two from the flange end surface. It is possible to automatically wind the coil outside the nozzle track by using the winding tension, and to realize a high space factor of the winding.

　更に、ボビンの巻線部表面を∩（弧）状のRで構成すると供に、テーパー面に半楕円状のRを設ける事で、コイルの被覆破損を軽減させた滑らかなコイル誘導及び巻線を可能にし、フランジの付け根部分には凹曲面が形成できるように、コイルの半径以上のRを設け、巻線テンションによるフランジ部の負荷を軽減させながら１巻目のコイル保持が可能な構造を設けている。 In addition, the coil surface of the bobbin is composed of ∩ (arc) -shaped R, and the coil surface breakage is reduced by providing a semi-elliptical R on the tapered surface. In order to be able to form a concave curved surface at the base of the flange, an R that is greater than the radius of the coil is provided, and a structure that can hold the first coil while reducing the load on the flange due to winding tension. Provided.

　更にボビンの側面に爪部を設ける事で、巻崩れの無い、高占積率、整列巻線を行う事を可能としている。 Furthermore, by providing a claw on the side surface of the bobbin, it is possible to perform a high space factor, aligned winding without collapse.

　本発明の実施例について図１～図６を用いて詳細に説明する。 Embodiments of the present invention will be described in detail with reference to FIGS.

　本発明の一実施例である、電動パワーステアリング用モータを用いてボビン構造及びコイル巻線の製造方法について説明していく。図１は電動パワーステアリングモータである車載用電動機１００の軸方向断面図を示したものである。先ず、全体の構成について説明する。ハウジング１の内周側には分割されたステータコア２が、溶接または溶接レスでリング形状を保持し圧入または焼嵌めされている。このステータコア２にはボビン３が取り付けられ、その外周部にコイル４が巻かれている。コイル４の口出し線はバスバーモールド１４に設けられたバスバーターミナル１５に接続され、バスバーターミナル１５の端面は、別のバスバーモールド１６に設けられたバスバーターミナル１７の端面と溶接により接続される。ステータコア２の内周側には、シャフト５、磁石７、磁石カバー８から構成される回転子（ロータコア６）が設けられており、回転子はFベアリング９及びRベアリング１０により支持され、Fベアリング９はハウジング１に、Rベアリング１０はカバーモータ１３にそれぞれ固定される。カバーモータ１３は貫通穴が設けられバスバーターミナル１５が通っており、ねじ１８によりバスバーモールド１６と接続される。更に、バスバーターミナル１７は各相の接続を3相出力できるように配線され、UVWの３相出力となっている。この3相出力端子１９にインバータから電力を給電することでモータは回転する。 A method for manufacturing a bobbin structure and a coil winding using an electric power steering motor according to an embodiment of the present invention will be described. FIG. 1 shows an axial sectional view of an in-vehicle electric motor 100 which is an electric power steering motor. First, the overall configuration will be described. A divided stator core 2 is press-fitted or shrink-fitted on the inner peripheral side of the housing 1 while maintaining a ring shape without welding or welding. A bobbin 3 is attached to the stator core 2 and a coil 4 is wound around the outer periphery thereof. The lead wire of the coil 4 is connected to a bus bar terminal 15 provided in the bus bar mold 14, and an end face of the bus bar terminal 15 is connected to an end face of a bus bar terminal 17 provided in another bus bar mold 16 by welding. A rotor (rotor core 6) composed of a shaft 5, a magnet 7, and a magnet cover 8 is provided on the inner peripheral side of the stator core 2, and the rotor is supported by an F bearing 9 and an R bearing 10, and the F bearing 9 is fixed to the housing 1, and the R bearing 10 is fixed to the cover motor 13. The cover motor 13 is provided with a through hole through which the bus bar terminal 15 passes, and is connected to the bus bar mold 16 by a screw 18. Furthermore, the bus bar terminal 17 is wired so that the connection of each phase can be output in three phases, and is a UVW three-phase output. The motor rotates by supplying power from the inverter to the three-phase output terminal 19.

　モータの回転を支える軸受け構造の設定は、シャフト５のギア側にＦベアリング９内輪を圧入し、外輪をハウジング1とトメワ１２で軸方向に固定している。シャフト５のインバータ側にはＲベアリング１０内輪を圧入し、カバーモータ１３の端面を利用した反力で、予圧ばね１１の予圧がＲベアリング１０の外輪を押し出し、インバータ側に常に予圧が掛かっている構造としている。モータ組付け後には、シャフト５の先端からインバータ側に向かって常時予圧が発生しており、Ｆベアリング９とＲベアリング１０の内外輪の隙間を最小限にする事ができる。そのため、ベアリング回転時の異音を極力抑える構造している。 The bearing structure that supports the rotation of the motor is set by press-fitting the inner ring of the F bearing 9 on the gear side of the shaft 5 and fixing the outer ring in the axial direction by the housing 1 and the tongue 12. The inner ring of the R bearing 10 is press-fitted to the inverter side of the shaft 5, and the preload of the preload spring 11 pushes the outer ring of the R bearing 10 by the reaction force using the end face of the cover motor 13, and the preload is always applied to the inverter side. It has a structure. After the motor is assembled, preload is always generated from the tip of the shaft 5 toward the inverter side, and the gap between the inner and outer rings of the F bearing 9 and the R bearing 10 can be minimized. Therefore, it has a structure that suppresses the abnormal noise when the bearing rotates.

　次に、図２を用いてハウジング１内部の構成について説明する。最外周にはステータコア２が配置されている。ステータコア２はT型の分割コアで構成されており、2つのティースに1つのコイル４が集中的に巻かれる2連続巻線構造となっている。各ステータコア２はコアバック外周部で溶接または、溶接レスでハウジング１の内径に嵌合される事で円環状に連結される。コイル口出し線４aは、先の図１で述べた通り、バスバーモールド１４に設けられたバスバーターミナル１５に加締められた後、コイル口出し線４ａとバスバーターミナル１５を溶接する事により、電気的接続を行う。 Next, the internal structure of the housing 1 will be described with reference to FIG. The stator core 2 is disposed on the outermost periphery. The stator core 2 is composed of a T-shaped split core, and has a two-continuous winding structure in which one coil 4 is intensively wound around two teeth. Each stator core 2 is connected in an annular shape by being welded to the outer periphery of the core back or fitted to the inner diameter of the housing 1 without welding. As described above with reference to FIG. 1, the coil lead wire 4a is crimped to the bus bar terminal 15 provided in the bus bar mold 14, and then the coil lead wire 4a and the bus bar terminal 15 are welded to make electrical connection. Do.

　図３（ａ）を用いて固定子の構成及び磁気回路の構成について説明する。ステータコア２の外径側の磁気回路幅２ｄは外周側と内周側を円弧状で構成する事で均一な磁気回路幅２ｄを得る事が可能となり、磁気回路入口２ａから磁気回路出口２ｂに向かってスムーズな磁気回路流れ２ｃを可能にしてモータ特性の悪化を防止すると供に、最適な磁気回路幅を得る事が可能となる。更に、巻線エリア２ｅにおいては磁気回路幅２ｄを最適化した事からステータコア２の形状に無駄な部分を発生する事が無くなるため、巻線エリア２ｅを広く取る事ができ、巻線の高占積率化及びモータ特性の向上と磁気回路の積厚を少なくする事ができ、結果モータのコストダウンを得る事が可能となる。 The configuration of the stator and the configuration of the magnetic circuit will be described with reference to FIG. The magnetic circuit width 2d on the outer diameter side of the stator core 2 can be obtained by forming the outer peripheral side and the inner peripheral side in a circular arc shape, so that a uniform magnetic circuit width 2d can be obtained, from the magnetic circuit inlet 2a to the magnetic circuit outlet 2b. In addition to enabling a smooth magnetic circuit flow 2c to prevent deterioration of the motor characteristics, it is possible to obtain an optimum magnetic circuit width. Further, in the winding area 2e, since the magnetic circuit width 2d is optimized, there is no need to generate a useless portion in the shape of the stator core 2, so that the winding area 2e can be widened and the winding area is increased. As a result, it is possible to reduce the thickness of the motor and the characteristics of the motor and reduce the thickness of the magnetic circuit. As a result, the cost of the motor can be reduced.

　図３（ｂ）を用いて従来の固定子の構成及び磁気回路の構成について説明する。ステータコア２の外径側の磁気回路幅２ｄは外周側は円弧状で構成され、内周側は直線で構成されている事で、均一な磁気回路幅２ｄを得られていないため、磁気回路出口２ｂ付近の磁気回路幅２ｄは狭く、ステータコア２の中心付近の磁気回路幅２ｄは広くなるため、磁気回路入口２ａから磁気回路出口２ｂに向かってスムーズな磁気回路流れ２ｃを得る事ができなくなり、モータ特性の悪化と供に、巻線エリア２ｅにおいても、ステータコア２の形状に無駄な部分が発生し、巻線エリア２ｅが狭くなるため、巻線の占積率を低下させてしまい、モータ特性が低下するため、コストアップする要因となる。 The configuration of the conventional stator and the configuration of the magnetic circuit will be described with reference to FIG. The magnetic circuit width 2d on the outer diameter side of the stator core 2 has an arc shape on the outer peripheral side and a straight line on the inner peripheral side, so that a uniform magnetic circuit width 2d cannot be obtained. Since the magnetic circuit width 2d near 2b is narrow and the magnetic circuit width 2d near the center of the stator core 2 is wide, it becomes impossible to obtain a smooth magnetic circuit flow 2c from the magnetic circuit inlet 2a toward the magnetic circuit outlet 2b. In addition to the deterioration of the motor characteristics, in the winding area 2e, a useless portion is generated in the shape of the stator core 2 and the winding area 2e is narrowed. As a result, the cost increases.

　図４（ａ）を用いてボビン３の構成について説明する。先に述べたステータコア２の磁気回路幅２ｄを決定させるための内径側の形状を円弧状に設定した事により、ボビン３のフランジ３ａに形成されるステータ嵌合面３ｂもそれに合わせて円弧状で構成する事により、高占積率を可能とした構造を得る事が可能となる。 The configuration of the bobbin 3 will be described with reference to FIG. Since the inner diameter side shape for determining the magnetic circuit width 2d of the stator core 2 described above is set in an arc shape, the stator fitting surface 3b formed on the flange 3a of the bobbin 3 also has an arc shape accordingly. By configuring, it is possible to obtain a structure that enables a high space factor.

　図４（ｂ）にボビン３の正面図、図４（ｃ）にボビン３の断面図を示す。ボビン３の巻線部表面３ｄの外径側には、フランジ３ａがあり、その両端部にフランジ端面３ｈが構成されている。フランジ端面３ｈはコイル４を巻線する巻線機の最外径側ノズル軌道３ｇの位置となり、巻線機のノズルが平行に移動しながらコイル４が巻線されるため、最外径側ノズル軌道３ｇからコイル４の幅１～２個分ボビン３の内径側に位置する所からフランジ３ａ側に向かってR面で構成されたテーパ面３ｅを設ける事で、コイル被覆を損傷させる事無く、巻線テンションを利用して自動でコイル４がボビン３のテーパ面を滑り、巻線機のノズル軌道外の部分に巻線を行う事が可能となる。結果コイル４の占積率を向上させる事が可能となり、更に、ボビン３のフランジ３ａの付け根部分とテーパ面３ｅが接続される部分にコイル４の半径以上の凹曲面３ｆを設ける事で、１巻目のコイル４を保持する効果及び巻線テンションでボビン３のフランジ３ａに与える負荷を軽減できる効果を得る事ができる。更に、ボビン３の側面に巻線位置を固定するための爪部３ｃを設ける事で、巻崩れしない整列巻線が可能になる効果を得る事ができると供に、ボビン３の巻線部表面３ｄをRで形成し∩（弧）状のRとすることで、コイル４とボビン３の接触面が増加し、巻線の際にコイル４に発生する応力が減少して、コイル４の被覆破損を防止する。更に、ボビン３端面の∩（弧）状のRを形成したことにより、コイル巻線時のテンションを大きくすること無く、ボビン３とコイル４の密着性を保った巻線ができる効果を得る事ができる。 4 (b) shows a front view of the bobbin 3, and FIG. 4 (c) shows a cross-sectional view of the bobbin 3. A flange 3a is provided on the outer diameter side of the winding surface 3d of the bobbin 3, and flange end surfaces 3h are formed at both ends thereof. The flange end face 3h is positioned at the outermost diameter nozzle track 3g of the winding machine that winds the coil 4, and the coil 4 is wound while the winding machine nozzle moves in parallel. By providing a taper surface 3e composed of an R surface from the track 3g to the flange 3a side from the inner diameter side of the bobbin 3 by one or two widths of the coil 4 without damaging the coil coating, The coil 4 automatically slides on the taper surface of the bobbin 3 by using the winding tension, and it is possible to wind the portion outside the nozzle track of the winding machine. As a result, the space factor of the coil 4 can be improved, and further, by providing a concave curved surface 3f having a radius equal to or larger than the radius of the coil 4 at the portion where the base portion of the flange 3a of the bobbin 3 and the tapered surface 3e are connected. The effect of reducing the load applied to the flange 3a of the bobbin 3 by the effect of holding the coil 4 of the winding and the winding tension can be obtained. Furthermore, by providing a claw portion 3c for fixing the winding position on the side surface of the bobbin 3, it is possible to obtain an effect of enabling an aligned winding that does not collapse, and the surface of the winding portion of the bobbin 3 By forming 3d with R and making it a bowl-shaped R, the contact surface between the coil 4 and the bobbin 3 is increased, and the stress generated in the coil 4 during winding is reduced, so that the coating of the coil 4 is reduced. Prevent damage. Furthermore, by forming a ridge-shaped R on the end face of the bobbin 3, it is possible to obtain an effect of making the winding while maintaining the adhesion between the bobbin 3 and the coil 4 without increasing the tension during coil winding. Can do.

　図５（ａ）と図５（ｂ）にステータコア２とボビン３を組付けた状態を示す。組立てはステータコア２の軸方向からボビン３が２個反転されるように挿入され、ボビン３の巻線部表面３ｄと凹曲面３ｆ、爪部３ｃにコイル４を引っ掛けながら集中巻きされる巻線構成となっている。 FIG. 5 (a) and FIG. 5 (b) show a state where the stator core 2 and the bobbin 3 are assembled. The assembly is inserted so that two bobbins 3 are reversed from the axial direction of the stator core 2, and the winding structure is such that concentrated winding is performed while the coil 4 is hooked on the winding surface 3 d, the concave curved surface 3 f, and the claw portion 3 c of the bobbin 3. It has become.

　図６に巻線後の状態を示す。先に述べたように、ボビン３のテーパ面３ｅにコイル４を滑らせて巻線機のノズル軌道外の部分から巻線を行いボビン３の爪部３ｃにコイル４を引っ掛けながら巻線を行う事により、巻崩れの無い、高占積率巻線を得る事が可能となる。 Fig. 6 shows the state after winding. As described above, the coil 4 is slid on the taper surface 3e of the bobbin 3 to perform winding from a portion outside the nozzle track of the winding machine, and winding is performed while the coil 4 is hooked on the claw portion 3c of the bobbin 3. As a result, it is possible to obtain a high space factor winding without collapse.

　以上述べたように、ステータコア２の磁気回路幅２ｄを円弧状で構成する事により、磁気回路幅２ｄの無駄なスペースを無くし、ステータコア２とボビン３の嵌合面３ｂも円弧状で構成する事で、巻線スペース２ｅを最大限有効に活用する事が可能となる。更に、ボビン３にテーパ面３ｅ、凹曲面３ｆ、Rで構成された巻線部表面３ｄ、爪部３ｃを設ける事で、コイル４の被覆の損傷を抑制しながら、ボビン３のフランジ３ａへの負荷を軽減し、巻線機のノズル軌道外の部分から巻崩れの無い、高占積率、整列巻線を行う事が可能となる。 As described above, by forming the magnetic circuit width 2d of the stator core 2 in an arc shape, useless space of the magnetic circuit width 2d is eliminated, and the fitting surface 3b of the stator core 2 and the bobbin 3 is also configured in an arc shape. Thus, the winding space 2e can be utilized to the maximum extent. Further, by providing the bobbin 3 with a winding surface 3d and a claw portion 3c composed of a tapered surface 3e, a concave curved surface 3f, and R, the damage to the coating of the coil 4 is suppressed, and the flange 3a of the bobbin 3 is attached to the bobbin 3. It is possible to reduce the load and perform winding with a high space factor and no winding from the part outside the nozzle track of the winding machine.

　本発明は、電動パワーステアリングモータに用いられるブラシレスモータや各種発電機等の車載用回転電機の磁気回路構造及びボビン構造、コイル巻線の構造として利用することができる。 The present invention can be used as a magnetic circuit structure, bobbin structure, and coil winding structure of in-vehicle rotating electrical machines such as brushless motors and various generators used in electric power steering motors.

　１00…車載用電動機、１…ハウジング、２…ステータコア、３…ボビン、４…コイル、…、５…シャフト、６…ロータコア、７…磁石、８…磁石カバー、９…Fベアリング、１０…Rベアリング、１１…予圧ばね、１２…トメワ、１３…カバーモータ、１４…バスバーモールド、１５…バスバーターミナル、１６…バスバーモールド、１７…バスバーターミナル、１８…ねじ、１９…３相出力端子、４ａ…コイル口出し線、２ａ…磁気回路入り口、２ｂ…磁気回路出口、２ｃ…磁気回路流れ、２ｄ…磁気回路幅、２ｅ…巻線エリア、３ａ…フランジ、３ｂ…ステータ嵌合面、３ｃ…爪部、３ｄ…巻線部表面、３ｅ…テーパ面、３ｆ…凹曲面、３ｇ…最外径側ノズル軌道、３ｈ…フランジ端面 DESCRIPTION OF SYMBOLS 100 ... Motor for motor vehicles, 1 ... Housing, 2 ... Stator core, 3 ... Bobbin, 4 ... Coil, ... 5 ... Shaft, 6 ... Rotor core, 7 ... Magnet, 8 ... Magnet cover, 9 ... F bearing, 10 ... R bearing , 11 ... Preload spring, 12 ... Tomewa, 13 ... Cover motor, 14 ... Busbar mold, 15 ... Busbar terminal, 16 ... Busbar mold, 17 ... Busbar terminal, 18 ... Screw, 19 ... Three-phase output terminal, 4a ... Coil opening 2a ... magnetic circuit outlet, 2c ... magnetic circuit flow, 2d ... magnetic circuit width, 2e ... winding area, 3a ... flange, 3b ... stator fitting surface, 3c ... claw part, 3d ... Winding surface, 3e ... taper surface, 3f ... concave curved surface, 3g ... outermost nozzle track, 3h ... flange end surface

Claims (8)

　車載用に用いられる集中巻で構成される回転電機であって、ステータコアの外径側の磁気回路幅を構成する外径側と内径側の形状が円弧状で幅寸法が均一に構成され、ボビンとステータコアの外径側の嵌合形状が円弧状で構成されるボビンにおいて、ボビンの軸方向に構成される巻線部表面にボビンのフランジ端面から内径側を基点に外径側に向かって次第に高さが低くなるようなテーパ面を設けた事を特徴とする回転電機。 A rotating electrical machine composed of concentrated windings used for in-vehicle use, wherein the outer diameter side and the inner diameter side of the magnetic circuit width on the outer diameter side of the stator core are circular in shape, and the width dimension is uniform, and the bobbin In the bobbin in which the fitting shape on the outer diameter side of the stator core is an arc shape, the surface of the winding portion configured in the axial direction of the bobbin is gradually moved from the flange end surface of the bobbin toward the outer diameter side from the inner diameter side as a base point. A rotating electrical machine characterized by providing a tapered surface that is low in height. 　請求項１に記載のボビンにおいて、フランジ部とテーパ面で構成されるフランジ部付け根部分に巻線時のコイルを位置決め可能にできる、コイルの半径以上のRを設けた事を特徴とする回転電機。 2. The bobbin according to claim 1, wherein an R having a radius equal to or greater than the radius of the coil is provided at the base portion of the flange portion formed by the flange portion and the tapered surface so that the coil can be positioned during winding. . 　請求項１に記載のボビンにおいて、テーパ面が半楕円形状となるようなRを設けた事を特徴とする回転電機。 The bobbin according to claim 1, wherein an R is provided so that the tapered surface is semi-elliptical. 　請求項１に記載のボビンにおいて、巻線部表面が∩状のR で構成される事を特徴とする
回転電機。 The bobbin according to claim 1, wherein the surface of the winding part is formed of a bowl-shaped R. 　請求項１に記載のボビンにおいて、ボビンの側面部に巻線時にコイル保持が可能な爪部を設けた事を特徴とする回転電機。 2. A bobbin according to claim 1, wherein a claw portion capable of holding a coil during winding is provided on a side surface portion of the bobbin. 　請求項１に記載のボビンにおいてテーパ面を利用して巻線機のノズル軌道外の部分に巻線を行う事を特徴とする回転電機。 A rotating electric machine characterized in that the bobbin according to claim 1 is wound on a portion outside a nozzle track of a winding machine by using a tapered surface. 請求項１に記載のボビンにおいて、ボビンの内径側にもテーパ面を設けている事を特徴とする回転電機。 The bobbin according to claim 1, wherein a taper surface is provided also on the inner diameter side of the bobbin. 請求項７に記載のボビンにおいて、ボビンの内径側に設けたテーパ面と内径ガイドを有する壁部が交わるエッジ部にRを設けコイルを保持できる機能を持たせた事を特徴とする回転電機。 8. The bobbin according to claim 7, wherein a function of holding a coil is provided by providing R at an edge portion where a tapered surface provided on an inner diameter side of the bobbin and a wall portion having an inner diameter guide intersect.
PCT/JP2014/079013 2013-12-20 2014-10-31 Rotating electric machine Ceased WO2015093157A1 (en)

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JP2021083216A (en) * 2019-11-19 2021-05-27 ヤマハ発動機株式会社 Rotating machine, stator for rotating machine and bobbin for rotating machine
CN114287871A (en) * 2022-03-09 2022-04-08 杭州康基医疗器械有限公司 Medical endoscope fluorescence cold light source camera system with high-efficient heat radiation structure
WO2024219120A1 (en) * 2023-04-19 2024-10-24 パナソニックＩｐマネジメント株式会社 Stator, electric motor, and method for manufacturing stator

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