WO2016152480A1

WO2016152480A1 - Motor core and axial gap-type motor

Info

Publication number: WO2016152480A1
Application number: PCT/JP2016/056953
Authority: WO
Inventors: 道生河本
Original assignee: Dmg森精機株式会社
Priority date: 2015-03-26
Filing date: 2016-03-07
Publication date: 2016-09-29
Also published as: JP2016185033A; JP6438815B2

Abstract

A stator core (32) is provided with: electrical steel sheets (41) which are annularly wound and have dividing parts (46) formed in the circumferential direction of the sheet; and joining members that join the electrical steel sheets (41) together at the dividing parts (46). Multiple electrical steel sheets (41) are laminated in the radial direction. The dividing parts (46) are disposed so as to be aligned with each other on a virtual line (116) that intersects the radial direction and between the electrical steel sheet (41) disposed on the inner peripheral side and the electrical steel sheet (41) disposed on the outer peripheral side. Due to this configuration, the motor core exhibits good magnetic balance and high rigidity.

Description

Motor core and axial gap type motor

This invention relates to a motor core and an axial gap type motor.

Regarding a conventional motor core, for example, 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.

JP-A-63-310355 JP 2012-210106 A

As disclosed in the above-mentioned Patent Document 1, in an axial gap type motor in which a rotor (rotor) and a stator (stator) are arranged with a gap in the direction of the rotation axis of the motor, a thin copper-coated steel strip A technique for forming a rotor by winding a coil is known. However, in such a rotor structure, there is a problem that an eddy current loss generated when the motor is driven increases due to the lamination of a plurality of copper-coated steel strips.

On the other hand, in Patent Document 2 described above, 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. However, in 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. Moreover, in the technique disclosed in Patent Document 2, 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.

Accordingly, 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 according to the present invention 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.

According to the present invention, it is possible to provide a motor core having a good magnetic balance and high rigidity, and an axial gap motor having such a motor core.

It is sectional drawing which shows an axial gap type motor provided with the stator core in Embodiment 1 of this invention. 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.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are denoted by the same reference numerals.

(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.

Referring to FIG. 1, 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. Referring to FIGS. 1 and 2, 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.

More specifically, 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. For example, 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.

In the present embodiment, 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.

Subsequently, the structure of the 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.

3 to 5, 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.

In the present embodiment, the stator core 32 includes electromagnetic steel plates 41 (n = 1 to 15), and these electromagnetic steel plates 41 (n = 1 to 15) are wound around the central axis (center shaft 101) of each electromagnetic steel plate 41. ) In the radial direction (the direction indicated by the arrow 102). The electromagnetic steel plates 41 (n = 1 to 15) are provided so as to be overlapped from the inner peripheral side to the outer peripheral side in order from the smallest n value. The electromagnetic steel plate 41 (n = 1) is arranged on the innermost side, and the electromagnetic steel plate (n = 15) is arranged on the outermost side.

The electromagnetic steel plates 41 (n = 1 to 15) of the electromagnetic steel plates 41 are provided in the electromagnetic steel plates 41 so as not to overlap in the radial direction. 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. The electromagnetic steel plates 41 (n = 1 to 15) are provided so as to have different diameters around the rotation axis of the rotor 10.

In the electromagnetic steel plate 41, a dividing portion 46 is formed. The division part 46 is provided so that the electromagnetic steel plate 41 may be divided in the circumferential direction.

In this embodiment, the electromagnetic steel sheet 41 (n = 1 to 15) is formed with the dividing portions 46 (n = 1 to 15), respectively. Each electromagnetic steel plate 41 of the electromagnetic steel plate 41 (n = 1 to 15) has a dividing surface 47 and a dividing surface 48 (see FIG. 5). 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.

In the present embodiment, the dividing portion 46 (n = 1 to 15) has a radius with respect to the winding center axis of the electromagnetic steel plate 41 between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15). They are arranged so as to line up on a virtual straight line 116 that intersects the direction (the direction indicated by the arrow 102). 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 extend along an imaginary straight line 116 between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15). 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.

In the present embodiment, 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. As 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.

In this embodiment, 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. Each of the divided portions 46A to 46L is provided on the virtual straight line 116 between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15).

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.

Description will be made by paying attention to the range shown in FIG. 4. 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 θ = 30 °. 41 (n = 1 to 15) are formed with dividing portions 46A (n = 1 to 15), respectively. In the magnetic steel sheet 41 (n = 1 to 15) in the phase range between the dashed-dotted line 112 and the dashed-dotted line 113 extending in the radial direction and forming an angle of θ = 30 ° with the dashed-dotted line 112, the dividing portions 46B ( n = 1 to 15) are formed.

The dividing portion 46A (n = 1 to 15) and the dividing portion 46B (n = 1 to 15) are provided so as not to overlap each other in the circumferential direction with respect to the winding center axis of the electromagnetic steel plate 41. The dividing portion 46A (n = 1 to 15) and the dividing portion 46B (n = 1 to 15) are provided so as to be continuous in the circumferential direction with respect to the winding central axis of the electromagnetic steel sheet 41. In other words, 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.

For reasons of the manufacturing process of the stator core 32, some of the plurality of divided portions 46 arranged on the virtual straight line 116 are slightly displaced in the circumferential direction, and the intervals in the circumferential direction of the divided portions 46A to 46L are slightly displaced. However, the present invention includes a stator core in which such a slight shift occurs.

Subsequently, functions and effects achieved by the stator core 32 and the axial gap motor 110 in the present embodiment will be described.

In this embodiment, 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. Thereby, the eddy current loss which generate | occur | produces with the drive of a motor can be reduced.

At this time, assuming that the stator core is configured by spirally winding the belt-shaped electromagnetic steel plate, in this case, 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.

On the other hand, in the present embodiment, 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.

Moreover, in this Embodiment, since 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 | positioned at an inner peripheral side and an outer peripheral side, when arranging on the line extended in a radial direction ( Compared with the case where the dividing part 46 is provided radially around the central axis 101), the joining area of the electromagnetic steel plate 41 by the joining member 51 can be increased. Thereby, the rigidity of the stator core 32 can be improved.

Particularly in the present embodiment, the teeth portion 33 in FIG. 2 is formed by machining a laminate of the electromagnetic steel plates 41. In this case, 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 structure of the stator core 32 according to the first embodiment of the present invention described above will be described together. 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.

According to the stator core 32 and the axial gap type motor 110 according to the embodiment of the present invention 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.

Note that the structure of the stator core 32 (electromagnetic steel plate 41) in the present embodiment may be applied to the rotor core 12 (electromagnetic steel plate 21). In this case, by arranging the plurality of dividing portions 46 at equal intervals in the circumferential direction, not only the magnetic balance of the rotor core 12 but also the weight balance is improved. Thereby, the vibration performance and noise performance of the axial gap type motor 110 can be improved.

(Embodiment 2)
In the present embodiment, various modifications of the structure of the stator core 32 in the first embodiment will be described.

FIG. 6 is a plan view showing a first modification of the stator core in FIG. Referring to FIG. 6, in this modification, each electromagnetic steel plate 41 is formed with divided portions 46 A, 46 B, 46 C, 46 D, 46 E, 46 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.

As in the first embodiment, the description will be made in correspondence with the range shown in FIG. 4. The dashed-dotted line 111 extending in the radial direction, and the dashed-dotted line 112 extending in the radial direction and forming an angle θ = 30 ° with the dashed-dotted line 111. Divided portions 46A (n = 1 to 15) are respectively formed on the electromagnetic steel plates 41 (n = 1 to 15) in the phase range between. The dividing portion 46 is not formed in the phase range between the alternate long and short dash line 112 and the alternate long and short dash line 113 that extends in the radial direction and forms an angle of θ = 30 °. Divided portions 46B (n = 1 to 15) are respectively formed on the electromagnetic steel sheet 41 (n = 1 to 15) in the phase range between the one-dot chain line 113 and the one-dot chain line 114 that forms an angle of θ = 30 ° with the one-dot chain line 113. ) Is formed.

That is, in this modification, 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. Referring to FIG. 7, in this modification, the dividing portion 46 (n = 1 to 15) is provided between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15). It is provided so as to be arranged on an imaginary curve 118 that intersects the radial direction with respect to the winding center axis. The virtual curve 118 is a curve that extends while curving between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15) and is convex toward the outer peripheral side.

FIG. 8 is a plan view showing a third modification of the stator core in FIG. Referring to FIG. 8, in this modification, the dividing portion 46 (n = 1 to 15) is provided between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15). They are arranged so as to line up on a virtual curve 119 that intersects the radial direction with respect to the winding center axis. The virtual curve 119 is a curve that extends while curving between the electromagnetic steel plate 41 (n = 1) and the electromagnetic steel plate 41 (n = 15) and is convex toward the inner peripheral side.

According to the 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.

According to the motor core thus configured, 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. Thereby, the magnetic balance of a motor core can be made favorable. At this time, since 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. Thus, the bonding area of the sheet-like conductor by the bonding member can be increased. Thereby, the rigidity of a motor core is securable.

Further preferably, each of the plurality of sheet-like conductors has a plurality of divided portions arranged at equal intervals in the circumferential direction.

According to the motor core configured as described above, the magnetic balance of the motor core can be further improved.

Further preferably, 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.

According to the motor core configured as described above, 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 according to the present invention 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.

According to the axial gap type motor configured as described above, an axial gap type motor having an excellent magnetic balance and having a highly rigid motor core can be realized.

The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

The present invention is applied to, for example, a stator core and / or a stator core of an axial gap type motor.

10 rotor, 12 rotor core, 14 magnets, 21, 41 electromagnetic steel plate, 30 stator, 32 stator core, 33 teeth portion, 34 yoke portion, 46, 46A, 46B, 46C, 46D, 46E, 46F, 46G, 46H, 46I, 46J , 46K, 46L cut section, 47, 48 cross section, 51 joint member, 60 crossover wire, 64 cooling flange, 66 coil, 68 bobbin, 101 central axis, 110 axial gap motor, 116 virtual straight line, 118, 119 virtual curve .

Claims

A sheet-like conductor wound in a ring and having a divided portion divided in the circumferential direction;
A joining member that joins the sheet-like conductor at the dividing portion;
A plurality of the sheet-like conductors are laminated in the radial direction,
The dividing portion is provided between the sheet-like conductor arranged on the inner peripheral side and the sheet-like conductor arranged on the outer peripheral side so as to be arranged on a line intersecting the radial direction. .
2. The motor core according to claim 1, wherein each of the plurality of sheet-like conductors includes a plurality of the divided portions arranged at equal intervals in the circumferential direction.
The dividing portion is provided so as to be arranged on a curve 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 motor core according to claim 1.
A rotor supported rotatably about a winding center axis of the sheet-like conductor;
A stator disposed with a gap in the axial direction of the winding center axis of the sheet-like conductor with respect to the rotor,
An axial gap type motor in which at least one of the rotor and the stator has the motor core according to any one of claims 1 to 3.