WO2016152480A1 - Noyau de moteur et moteur de type à entrefer axial - Google Patents

Noyau de moteur et moteur de type à entrefer axial Download PDF

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Publication number
WO2016152480A1
WO2016152480A1 PCT/JP2016/056953 JP2016056953W WO2016152480A1 WO 2016152480 A1 WO2016152480 A1 WO 2016152480A1 JP 2016056953 W JP2016056953 W JP 2016056953W WO 2016152480 A1 WO2016152480 A1 WO 2016152480A1
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WO
WIPO (PCT)
Prior art keywords
electromagnetic steel
sheet
motor
rotor
steel plate
Prior art date
Application number
PCT/JP2016/056953
Other languages
English (en)
Japanese (ja)
Inventor
道生 河本
Original Assignee
Dmg森精機株式会社
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 Dmg森精機株式会社 filed Critical Dmg森精機株式会社
Publication of WO2016152480A1 publication Critical patent/WO2016152480A1/fr

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors

Definitions

  • This invention relates to a motor core and an axial gap type motor.
  • Japanese Patent Laid-Open No. 63-310355 discloses an induction motor rotor for the purpose of facilitating manufacture (Patent Document 1).
  • the rotor of the induction motor disclosed in Patent Document 1 has a cylindrical shape, and two pairs of stators are disposed on both sides in the axial direction with a gap therebetween.
  • a rotor of an induction motor is formed by winding a thin copper-coated steel strip around a copper ring in a flat-wise manner and laminating them together.
  • Japanese Patent Laid-Open No. 2012-210106 discloses a wound iron core for the purpose of reducing iron loss and cost (Patent Document 2).
  • the wound iron core disclosed in Patent Document 2 is used for a stator of an axial gap motor.
  • the wound iron core is composed of a spiral magnetic thin plate, and notches are formed at a plurality of positions from the start to the end of winding of the magnetic thin plate.
  • Patent Document 2 as a method of reducing eddy current loss generated in the stator, a technique of forming notches at a plurality of portions of a spiral magnetic thin plate is disclosed.
  • the technique disclosed in Patent Literature 2 since the winding start and the winding end exist in the spiral magnetic thin plate, the roundness of the wound iron core is deteriorated. This impairs the magnetic balance of the wound core in the circumferential direction.
  • the rigidity of the wound iron core is reduced due to the formation of the notch. For this reason, when providing a notch part in a magnetic thin plate, it is necessary to fully consider ensuring the rigidity of a wound iron core.
  • an object of the present invention is to solve the above-described problem, and to provide a motor core having a good magnetic balance and high rigidity, and an axial gap motor having such a motor core. is there.
  • a motor core according to the present invention includes a sheet-like conductor that is wound in an annular shape and has a dividing portion that is divided in the circumferential direction thereof, and a joining member that joins the sheet-like conductor at the dividing portion.
  • a plurality of sheet-like conductors are stacked in the radial direction.
  • the dividing portion is provided so as to be aligned on a line intersecting the radial direction between the sheet-like conductor disposed on the inner peripheral side and the sheet-shaped conductor disposed on the outer peripheral side.
  • An axial gap motor includes a rotor that is rotatably supported around a winding center axis of a sheet-like conductor, and an axial direction of the winding center axis of the sheet-like conductor with respect to the rotor. And a stator arranged with a gap. At least one of the rotor and the stator has the motor core.
  • FIG. 2 is a perspective view showing an appearance of a stator core in the axial gap type motor in FIG. 1. It is a top view which shows the stator core in FIG.
  • FIG. 4 is a plan view of a stator core showing a range surrounded by a two-dot chain line IV in FIG. 3.
  • FIG. 5 is an enlarged plan view of a stator core showing a range surrounded by a two-dot chain line V in FIG. 4. It is a top view which shows the 1st modification of the stator core in FIG. It is a top view which shows the 2nd modification of the stator core in FIG. It is a top view which shows the 3rd modification of the stator core in FIG.
  • (Embodiment 1) 1 is a cross-sectional view showing an axial gap type motor including a stator core according to Embodiment 1 of the present invention.
  • the axial gap type motor 110 includes a rotor 10 and a stator 30 as main components.
  • the rotor 10 is supported so as to be rotatable about a virtual center axis 101 shown in the figure.
  • the rotor 10 rotates with the central axis 101 as the rotation central axis in accordance with the driving of the motor.
  • the stator 30 is provided to face the rotor 10 with a gap (gap) provided in the rotation axis direction of the rotor 10.
  • the rotor 10 and the stator 30 are provided side by side in the rotation axis direction of the rotor 10.
  • FIG. 2 is a perspective view showing the appearance of the stator core in the axial gap type motor shown in FIG.
  • stator 30 is configured by combining stator core 32, bobbin 68, coil 66, and cooling flange 64.
  • the stator core 32 as a whole has a cylindrical shape in which a hole penetrating along the rotation axis of the rotor 10 is formed.
  • the stator core 32 has a yoke part 34 and a plurality of teeth parts 33 as its constituent parts.
  • the yoke portion 34 has a disk shape that goes around the rotation center axis of the rotor 10.
  • the plurality of teeth portions 33 are provided side by side in the circumferential direction around the rotation center axis of the rotor 10.
  • the plurality of tooth portions 33 are provided at equal intervals around the rotation center axis of the rotor 10.
  • Each tooth portion 33 is provided so as to protrude from the yoke portion 34 toward the rotor 10.
  • a coil 66 is wound around the plurality of teeth portions 33 via bobbins 68. The coil 66 is appropriately connected between the plurality of tooth portions 33 by a crossover 60.
  • the stator core 32 has a plurality of electromagnetic steel plates 41.
  • the electromagnetic steel plate 41 has a sheet shape.
  • the electromagnetic steel sheet 41 has any thickness of 0.15 mm, 0.20 mm, 0.35 mm, and 0.50 mm.
  • the electromagnetic steel plate 41 is wound in an annular shape.
  • the electromagnetic steel sheet 41 is provided such that its winding center axis coincides with the rotation center axis (center axis 101) of the rotor 10.
  • the plurality of electromagnetic steel plates 41 are stacked in the radial direction with respect to the winding center axis of each electromagnetic steel plate 41 (in other words, in the radial direction with respect to the rotation center axis of the rotor 10).
  • the rotor 10 is configured by combining a rotor core 12 and a plurality of magnets 14.
  • the rotor core 12 as a whole has a cylindrical shape in which a hole penetrating along the rotation center axis of the rotor 10 is formed.
  • the rotor core 12 has a plurality of electromagnetic steel plates 21. Since the shape of the electromagnetic steel plate 21 and the form in which the electromagnetic steel plate 21 is provided are the same as the electromagnetic steel plate 41 in the stator core 32, description thereof will not be repeated.
  • the magnetic flux formed in the stator core 32 (rotor core 12) when the motor is driven does not intersect with the boundary between the electromagnetic steel plates 41 (electromagnetic steel plates 21) adjacent in the radial direction, and each of the electromagnetic steel plates 41. It flows in the plate of (each electromagnetic steel plate 21). Thereby, it is suppressed that a loss arises in the magnetic flux flow in stator core 32 (rotor core 12).
  • the magnet 14 is provided so as to cover the surface of the rotor core 12 facing the stator core 32.
  • the magnet 14 faces the stator core 32 through a gap.
  • the plurality of magnets 14 are provided side by side in the circumferential direction about the rotation center axis of the rotor 10.
  • the cooling flange 64 is fixed to the stator core 32 from the opposite side to the rotor 10 in the axial direction of the rotation center axis of the rotor 10.
  • the cooling flange 64 is formed with a refrigerant path through which the refrigerant can flow.
  • the stator 30 that has generated heat as the motor is driven is cooled by circulating the coolant through the cooling flange 64.
  • the axial gap type motor 110 having such a structure has a shorter overall length of the motor in the direction of the rotor 10 and makes the space on the inner diameter side of the rotor 10 more effective when compared with a general radial gap type motor. It has the feature that it can be used. As an example, the axial gap type motor 110 is suitably used as the power of the main shaft of a lathe.
  • stator core 32 provided in the axial gap motor 110 in FIG. 1 will be described in detail.
  • FIG. 3 is a plan view showing the stator core in FIG. In the figure, a laminated body of the electromagnetic steel plates 41 before the teeth portion 33 is formed is shown.
  • FIG. 4 is a plan view of the stator core showing a range surrounded by a two-dot chain line IV in FIG. 3.
  • FIG. 5 is an enlarged plan view of the stator core showing a range surrounded by a two-dot chain line V in FIG.
  • the stator core 32 is configured by laminating a plurality of electromagnetic steel plates 41 in the radial direction with respect to the winding center axis of each electromagnetic steel plate 41.
  • Each electromagnetic steel plate 41 is provided so as to have substantially the same diameter around the rotation center axis (center axis 101) of the rotor 10.
  • a dividing portion 46 is formed in the electromagnetic steel plate 41.
  • the division part 46 is provided so that the electromagnetic steel plate 41 may be divided in the circumferential direction.
  • the dividing surface 47 and the dividing surface 48 are end surfaces formed on the electromagnetic steel plate 41 by the dividing part 46 and face each other with the dividing part 46 interposed therebetween.
  • the dividing portion 46 is arranged between the electromagnetic steel plate 41 arranged on the inner peripheral side and the electromagnetic steel plate 41 arranged on the outer peripheral side, on a line intersecting the radial direction with respect to the winding center axis of the electromagnetic steel plate 41. Is provided.
  • the virtual straight line 116 is a straight line extending in a direction oblique to the radial direction.
  • the dividing surface 47 and the dividing surface 48 are abutted in the circumferential direction with respect to the winding central axis of the electromagnetic steel plate 41 through a minute gap in which a joining member 51 described later is inserted.
  • the stator core 32 further includes a joining member 51.
  • the joining member 51 is provided so as to join the electromagnetic steel plate 41 at the dividing portion 46.
  • the joining member 51 is provided so as to fill a minute gap between the dividing surface 47 and the dividing surface 48 that are abutted in the circumferential direction.
  • the joining member 51 for example, an impregnating adhesive that joins the electromagnetic steel sheet 41 by dipping into a minute gap between the dividing surface 47 and the dividing surface 48 in the dividing portion 46 is used.
  • the joining member 51 is further provided so as to join the electromagnetic steel plates 41 adjacent in the radial direction.
  • the electromagnetic steel plate 41 is formed with a plurality of divided portions 46.
  • the plurality of dividing portions 46 are provided at intervals in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41.
  • the plurality of dividing portions 46 are provided at equal intervals in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41.
  • Each electromagnetic steel plate 41 is divided at equal intervals in the circumferential direction with respect to the winding central axis of the electromagnetic steel plate 41 by a plurality of dividing portions 46.
  • each electromagnetic steel plate 41 is formed with divided portions 46A, 46B, 46C, 46D, 46E, 46F, 46G, 46H, 46I, 46J, 46K, and 46L.
  • the dividing portions 46A to 46L are provided at 30 ° intervals in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41.
  • the angle formed between the imaginary straight line 116 in which the divided portions 46 of the divided portions 46A to 46L are arranged and the radial direction (direction indicated by the arrow 102) with respect to the winding central axis of the electromagnetic steel sheet 41 is the same between the divided portions 46A to 46L. It is.
  • An electrical steel sheet having a phase range between a one-dot chain line 111 extending in the radial direction and a one-dot chain line 112 extending in the radial direction and forming an angle of ⁇ 30 °.
  • the dividing portions 46A to 46L are provided so that the dividing portion 46 exists uniformly in the circumferential direction with respect to the winding center axis of the electromagnetic steel sheet 41.
  • the present invention includes a stator core in which such a slight shift occurs.
  • stator core 32 and the axial gap motor 110 in the present embodiment will be described.
  • the flow of eddy current is interrupted by providing the electromagnetic steel sheet 41 with a dividing portion 46 for dividing the electromagnetic steel sheet 41 in the circumferential direction.
  • the stator core is configured by spirally winding the belt-shaped electromagnetic steel plate
  • the roundness of the stator core with respect to the central shaft 101 is caused by imbalance due to the start and end of winding of the electromagnetic steel plate. Becomes worse. As a result, the magnetic balance of the stator core around the central axis 101 may be impaired.
  • the electromagnetic steel plate 41 since the plurality of electromagnetic steel plates 41 wound in an annular shape around the central axis 101 are laminated in the radial direction, the electromagnetic steel plate 41 is unbalanced due to the start and end of winding. It does not occur. Furthermore, since the plurality of dividing portions 46 are arranged at equal intervals in the circumferential direction, the electromagnetic steel plates 41 can be arranged more evenly around the axis of the central axis 101. As a result, the magnetic balance of the stator core 32 can be improved.
  • the parting part 46 is provided so that it may line up on the virtual straight line 116 between the electromagnetic steel plates 41 arrange
  • the teeth portion 33 in FIG. 2 is formed by machining a laminate of the electromagnetic steel plates 41.
  • the structure of the stator core 32 in the present embodiment is more preferably applied because the laminated body of the electromagnetic steel sheets 41 needs to have rigidity that can withstand the load during machining.
  • the stator core 32 as the motor core in the present embodiment is wound in an annular shape and divided in the circumferential direction.
  • An electromagnetic steel plate 41 as a sheet-like conductor having 46 and a joining member 51 for joining the electromagnetic steel plate 41 at the dividing portion 46 are provided.
  • a plurality of electromagnetic steel plates 41 are stacked in the radial direction.
  • the dividing portion 46 is provided between the electromagnetic steel plate 41 arranged on the inner peripheral side and the electromagnetic steel plate 41 arranged on the outer peripheral side so as to be arranged on a virtual straight line 116 as a line intersecting with the radial direction.
  • the stator core 32 and the axial gap type motor 110 configured as described above, the stator core 32 having a good magnetic balance and high rigidity can be realized. Further, by using such a stator core 32, it is possible to realize the axial gap type motor 110 having excellent magnetic characteristics and high reliability with respect to rigidity. Further, by using the stator core 32 having excellent roundness, the center of the motor can be easily set, so that the workability at the time of assembling the axial gap type motor 110 can be improved.
  • stator core 32 electromagnetically steel plate 41
  • rotor core 12 electromagnetically steel plate 21
  • the vibration performance and noise performance of the axial gap type motor 110 can be improved.
  • FIG. 6 is a plan view showing a first modification of the stator core in FIG.
  • each electromagnetic steel plate 41 is formed with divided portions 46 ⁇ / b> A, 46 ⁇ / b> B, 46 ⁇ / b> C, 46 ⁇ / b> D, 46 ⁇ / b> E, 46 ⁇ / b> F.
  • the dividing portions 46A to 46F are provided at intervals of 60 ° in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41.
  • the dividing portions 46A to 46F are provided at equal intervals in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41, but the dividing portions 46 in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41 are provided. Are not provided to exist uniformly.
  • FIG. 7 is a plan view showing a second modification of the stator core in FIG.
  • FIG. 8 is a plan view showing a third modification of the stator core in FIG.
  • stator core 32 and the axial gap type motor 110 according to the second embodiment of the present invention configured as described above, the effects described in the first embodiment can be similarly obtained.
  • a motor core according to the present invention includes a sheet-like conductor that is wound in an annular shape and has a dividing portion that is divided in the circumferential direction thereof, and a joining member that joins the sheet-like conductor at the dividing portion.
  • a plurality of sheet-like conductors are stacked in the radial direction.
  • the dividing portion is provided so as to be aligned on a line intersecting the radial direction between the sheet-like conductor disposed on the inner peripheral side and the sheet-shaped conductor disposed on the outer peripheral side.
  • the roundness of the motor core can be improved by laminating a plurality of sheet-like conductors wound in an annular shape in the radial direction.
  • the magnetic balance of a motor core can be made favorable.
  • the dividing portion is provided so as to be arranged on a line intersecting the radial direction between the sheet-like conductors on the inner peripheral side and the outer peripheral side, compared with a case where the dividing portion is provided so as to be arranged on a line extending in the radial direction.
  • the bonding area of the sheet-like conductor by the bonding member can be increased.
  • the rigidity of a motor core is securable.
  • each of the plurality of sheet-like conductors has a plurality of divided portions arranged at equal intervals in the circumferential direction.
  • the magnetic balance of the motor core can be further improved.
  • the dividing portion is provided so as to be arranged on a curve intersecting with the radial direction between the sheet-like conductor arranged on the inner peripheral side and the sheet-like conductor arranged on the outer peripheral side.
  • the joining area of the sheet-like conductor by the joining member can be further increased as compared with the case where the dividing portions are provided so as to be arranged on a straight line intersecting the radial direction. .
  • An axial gap motor includes a rotor that is rotatably supported around a winding center axis of a sheet-like conductor, and an axial direction of the winding center axis of the sheet-like conductor with respect to the rotor. And a stator arranged with a gap. At least one of the rotor and the stator has the motor core described in any of the above.
  • an axial gap type motor having an excellent magnetic balance and having a highly rigid motor core can be realized.
  • the present invention is applied to, for example, a stator core and / or a stator core of an axial gap type motor.

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

Abstract

L'invention concerne un noyau (32) de stator pourvu : de tôles d'acier électriques (41) qui sont enroulées de façon annulaire et qui comportent des parties de division (46) formées dans la direction circonférentielle de la tôle ; et d'éléments de liaison qui relient les tôles d'acier électriques (41) les unes aux autres au niveau des parties de division (46). De multiples tôles d'acier électriques (41) sont laminées dans la direction radiale. Les parties de division (46) sont disposées de façon à être alignées les unes avec les autres sur une ligne virtuelle (116) qui coupe la direction radiale et entre la tôle d'acier électrique (41) disposée du côté périphérique intérieur et la tôle d'acier électrique (41) disposée du côté périphérique extérieur. Grâce à cette configuration, le noyau de moteur présente un bon équilibre magnétique et une rigidité élevée.
PCT/JP2016/056953 2015-03-26 2016-03-07 Noyau de moteur et moteur de type à entrefer axial WO2016152480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015064521A JP6438815B2 (ja) 2015-03-26 2015-03-26 モータコアおよびアキシャルギャップ型モータ
JP2015-064521 2015-03-26

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Publication Number Publication Date
WO2016152480A1 true WO2016152480A1 (fr) 2016-09-29

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PCT/JP2016/056953 WO2016152480A1 (fr) 2015-03-26 2016-03-07 Noyau de moteur et moteur de type à entrefer axial

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JP (1) JP6438815B2 (fr)
WO (1) WO2016152480A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005185075A (ja) * 2003-12-24 2005-07-07 Fujitsu General Ltd アキシャルギャップ型電動機
JP2009284578A (ja) * 2008-05-20 2009-12-03 Hitachi Metals Ltd アキシャルギャップモータ及びそれを用いたファン装置
JP2011091933A (ja) * 2009-10-22 2011-05-06 Hitachi Industrial Equipment Systems Co Ltd アキシャルギャップモータ、圧縮機、モータシステム、および発電機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005185075A (ja) * 2003-12-24 2005-07-07 Fujitsu General Ltd アキシャルギャップ型電動機
JP2009284578A (ja) * 2008-05-20 2009-12-03 Hitachi Metals Ltd アキシャルギャップモータ及びそれを用いたファン装置
JP2011091933A (ja) * 2009-10-22 2011-05-06 Hitachi Industrial Equipment Systems Co Ltd アキシャルギャップモータ、圧縮機、モータシステム、および発電機

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JP6438815B2 (ja) 2018-12-19
JP2016185033A (ja) 2016-10-20

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