Coil body, armature, and rotating electrical machine

Abstract

The coil body (32) includes a belt member (34) and a plurality of coil portions (16). The belt member (34) is formed in a sheet shape extending in the circumferential direction using an insulating material, and is laminated in the radial direction. The plurality of coil sections (16) are each formed on the belt member (34) using a conductive material, and have a plurality of conductor sections (16B) arranged side by side in the circumferential direction. The conductor parts (16B) formed on one layer of belt member (34) and the conductor parts (16B) formed on the other layer of belt member (34) are alternately arranged in the circumferential direction. In addition, the plurality of conductor parts (16B) formed on one layer of belt member (34) and the plurality of conductor parts (16B) formed on the other layer of belt member (34) overlap in the circumferential direction.

Description

Citation of Related Applications

[0001] This application is based on Japanese Patent Application No. 2022-198067 filed on December 12, 2022, the contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to a coil body, an armature, and a rotating electric machine. Background Art

[0003] A cylindrical coil is disclosed in Patent Document 1 below. In this cylindrical coil, a coil pattern groove is formed on the outer surface of a cylindrical base body, and a coil pattern is formed on the cylindrical base body by filling a conductive body in the coil pattern groove. In this cylindrical coil, the roundness of the coil and the accuracy of vibration can be improved. Further, in a rotating electric machine including this cylindrical coil, the magnetic gap can be reduced, and the output and efficiency of the rotating electric machine can be improved. Prior Art Documents Patent Documents

[0004] Patent Document 1: Japanese Patent No. 5017627 Gazette Summary of the Invention

[0005] From the viewpoint of achieving high efficiency and high torque of a rotating electric machine, it is desired to increase the duty factor of the coil body (cylindrical coil), and there is room for improvement in this regard in the structure described in Patent Document 1 above.

[0006] An object of the present disclosure is to increase the duty factor of the coil body.

[0007] In a first aspect of the present disclosure, the coil body includes a sheet-like member and a plurality of coil portions. The sheet-like member is formed of an insulating material into a sheet shape extending in the circumferential direction and laminated in the radial direction. The plurality of coil portions are formed of a conductive material on the sheet-like member, respectively, and have a plurality of conductor portions arranged in the circumferential direction. The conductor portions formed on one layer of the sheet-like member and the conductor portions formed on another layer of the sheet-like member are alternately arranged in the circumferential direction, and the plurality of conductor portions formed on one layer of the sheet-like member and the plurality of conductor portions formed on another layer of the sheet-like member overlap in the circumferential direction. Further, the armature includes the coil body. In addition, the rotating electric machine includes: one of a stator and a rotor configured to include the armature; and the other of the stator and the rotor having a magnet arranged opposite to the coil body in the radial direction or the axial direction.

[0008] By configuring in this way, the duty factor of the coil body can be increased. Brief Description of the Drawings

[0009] The above objects, other objects, features, and advantages of the present disclosure can be made more apparent by referring to the accompanying drawings and the following detailed description. The accompanying drawings are described below. Figure 1 It is a perspective view showing a motor, with a part of the motor shown in a cutaway manner. Figure 2 It is an exploded perspective view showing the motor in an exploded manner, with a part of the components shown in a cutaway manner. Figure 3 It is a perspective view schematically showing a coil body. Figure 4 It is a view showing the coil body. Figure 5 It is a view explaining the star connection. Figure 6 It is a view showing a coil part. Figure 7 It is a view showing the Figure 6 coil part having a different structure from the coil part shown. Figure 8 It is a view showing a plurality of coil parts of the U phase. Figure 9 It is a schematic view showing a plurality of coil parts of the first coil group constituting the U phase and a plurality of coil parts of the second coil group constituting the U phase being axially offset. Figure 10 It is a cross-sectional view showing a part of the coil body. Figure 11 It is a cross-sectional view showing a part of the coil body. Figure 12 It is a cross-sectional view showing a part of the coil body. Figure 13 It is a cross-sectional view showing a cross-section obtained by radially cutting the coil body. Figure 14 It is a cross-sectional view showing a part of a belt member formed in a specific layer and a coil part formed on the belt member in the coil part of the motor of the first embodiment. Figure 15 It is a cross-sectional view showing a part of a belt member formed in a plurality of layers and coil parts respectively formed on the belt members in a plurality of layers in the coil part of the motor of the first embodiment. Figure 16 It is a perspective view schematically showing a process of overlapping one belt member with another belt member in the manufacturing process of the coil part of the motor of the first embodiment. Figure 17 It is a view showing a belt member in one layer and another belt member adjacent to this belt member in the radial direction in the coil body of the motor of the first embodiment, unfolded in a planar shape. Figure 18It is shown Figure 17 The diagram shows a state where one layer of belt members overlaps with another layer of belt members. Figure 19 This is a cross-sectional view showing a portion of a belt member formed on a specific layer and a cross section of the coil portion formed on the belt member in the coil portion of the electric motor according to the second embodiment. Figure 20 It is a cross-sectional view showing a part of a belt member formed in a plurality of layers and a cross section of the coil portion formed on each of the belt members in the plurality of layers, among the coil portions of the electric motor according to the second embodiment. Figure 21 This is a perspective view schematically showing a step of overlapping a belt member of one layer with a belt member of another layer in the manufacturing process of the coil portion of the electric motor according to the second embodiment. Figure 22 This is a diagram showing a belt member of one layer and another belt member radially adjacent to the belt member of the coil body of the electric motor according to the second embodiment developed in a planar form. Figure 23 It is shown Figure 22 The diagram shows a state where one layer of belt members overlaps with another layer of belt members. Figure 24 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the third embodiment in the radial direction. Figure 25 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the fourth embodiment in the radial direction. Figure 26 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the fifth embodiment in the radial direction. Figure 27 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the sixth embodiment in the radial direction. Figure 28 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the seventh embodiment in the radial direction. Figure 29 It is a schematic diagram of a cross section obtained by cutting the stator of the electric motor according to the eighth embodiment in the radial direction. Figure 30 The figure is a plan view of a belt member of one layer and another belt member radially adjacent to the belt member of the coil body of the electric motor according to the ninth embodiment developed in a planar form. Figure 31 It is shown Figure 30 The diagram shows a state where one layer of belt members overlaps with another layer of belt members. Figure 32 It is a diagram for explaining a method of joining both end portions in the circumferential direction of a belt member in a coil body of an electric motor according to a tenth embodiment. Figure 33 It is a diagram for explaining a method of joining both end portions in the circumferential direction of a belt member in a coil body of an electric motor according to an eleventh embodiment. Figure 34 The first layer belt member is a cross-sectional view showing a state before being wound into a ring shape and a coil portion formed on the belt member. Figure 35 This is a diagram for explaining a process of winding a tape member along a winding mandrel. Figure 36 The first layer belt member is a cross-sectional view showing a state before being wound into a ring shape and a coil portion formed on the belt member. Figure 37 This is a diagram for explaining a process of winding a tape member along a winding mandrel. Figure 38 This is a diagram for explaining a process of winding a tape member along a winding mandrel. Figure 39 It is a diagram for explaining the process of winding the tape member along the stator core. Figure 40 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the twelfth embodiment along the radial direction. Figure 41 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the thirteenth embodiment along the radial direction. Figure 42 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the fourteenth embodiment along the radial direction. Figure 43 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the fifteenth embodiment along the radial direction. Figure 44 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the sixteenth embodiment along the radial direction. Figure 45 It is a schematic diagram of a cross section obtained by cutting the coil body of the electric motor according to the seventeenth embodiment along the radial direction. DETAILED DESCRIPTION

[0010] (Basic structure of electric motor) use Figures 1 to 13 The basic structure of the motor 10 of the present disclosure is described. In addition, the arrow Z direction, arrow R direction, and arrow C direction indicated appropriately in the figure respectively indicate the rotation axial side, the rotation radial side, and the rotation circumferential side of the rotor 12 described later. In addition, below, when only the axial direction, radial direction, and circumferential direction are indicated, unless otherwise specified, they all indicate the rotation axial direction, rotation radial direction, and rotation circumferential direction of the rotor 12. In addition, the motor 10 and the motors of each embodiment described later are examples of rotating electrical machines.

[0011] As shown in Figure 1 and Figure 2 FIG. 1, the motor 10 is an inner-rotor type brushless motor in which a rotor 12 as a rotating body is disposed radially inside a stator 14 as an armature and a fixed body. Further Figure 1 and Figure 2 the figures shown in FIGS. 2 and 3 are figures showing the motor 10 etc. as an example, and there are points where the number of coil portions 16, the number of magnets 18, and the shapes in details are inconsistent with each other in the following description

[0012] The rotor 12 is configured to include: a rotating shaft 22 that is supported by a pair of bearings 20 so as to be rotatable; a rotor core portion 24 that is fixed to the rotating shaft 22; and a plurality of magnets 18 that are fixed to a radially outer surface of the rotor core portion 24. Further, the pair of bearings 20 are respectively supported by a frame 21 and a frame end portion 23. The stator 14 etc. are housed between the frame 21 and the frame end portion 23

[0013] The rotor core portion 24 includes: a first cylindrical portion 24A that is formed in a cylindrical shape and has the rotating shaft 22 fixed thereto by press-fitting etc.; and a second cylindrical portion 24B that is disposed radially outside the first cylindrical portion 24A and is formed in a cylindrical shape. The radially outer surface of the second cylindrical portion 24B, that is, the outer peripheral surface, is formed in a cylindrical surface shape in the circumferential direction. The magnets 18 described later are fixed to the outer peripheral surface of the second cylindrical portion 24B of the rotor core portion 24

[0014] The plurality of magnets 18 are formed using a magnetic compound having an intrinsic coercive force Hc of 400 [kA / m] or more and a residual magnetic flux density Br of 1.0 [T] or more. As an example, the magnets 18 use NdFe 11 TiN, Nd2Fe 14 B, Sm2Fe 17 N3, FeNi and other magnetic compounds to form. Further, the plurality of magnets 18 are fixed to the outer peripheral surface of the second cylindrical portion 24B of the rotor core portion 24. Further, the magnets 18 having an N-pole on the radially outer surface and the magnets 18 having an S-pole on the radially outer surface are alternately arranged in the circumferential direction. Further, the number of the magnets 18 may be appropriately set in consideration of the output required for the motor 10 etc

[0015] The stator 14 includes: a stator core portion 26 as an armature core portion formed in a ring shape; and a coil body 32 attached to the stator core portion 26. As shown in Figures 1 to 3 FIG. 4, the stator 14 is formed in a toothless structure in which a part of the stator core portion 26 is not disposed inside a coil portion 16 that is a part of the coil body 32

[0016] As shown in Figure 1 and Figure 2As shown, the stator core 26 is formed in a ring shape using a soft magnetic material such as steel. The stator core 26 and the rotor 12 are arranged coaxially, and the axial center position of the stator core 26 coincides with the axial center position of the plurality of magnets 18 fixed to the rotor core 24 in the axial direction.

[0017] As Figure 3 and Figure 4 shown, the coil body 32 is configured to include a belt member 34 as a sheet member formed of an insulating material in a sheet shape and a plurality of coil portions 16 formed on the belt member 34.

[0018] The belt member 34 is formed in a belt shape with the axial direction as the short side direction and the circumferential direction orthogonal to the axial direction as the long side direction. In addition, the radial direction is the thickness direction of the belt member 34. The thickness of the belt member 34 is set to a thickness that enables the belt member 34 to be bent in the circumferential direction. In a state where the belt member 34 is wound around the circumferential direction a plurality of times, the belt member 34 becomes cylindrical. In addition, most of the belt member 34 is four layers in the radial direction. This will be described in detail later.

[0019] As Figure 3 shown, a plurality of coil portions 16 are formed on the belt member 34. And, as Figure 3 and Figure 4 shown, by winding the belt member 34 around the circumferential direction a plurality of times, the plurality of coil portions 16 are arranged at specified positions in the circumferential and radial directions.

[0020] Here, as Figure 5 shown, a plurality of coil portions 16 (U-phase coil group 42U) constituting the U-phase, a plurality of coil portions 16 (V-phase coil group 42V) constituting the V-phase, and a plurality of coil portions 16 (W-phase coil group 42W) constituting the W-phase are connected by a star connection.

[0021] Figure 6 A single coil portion 16 that is a part of the U-phase coil group 42U is shown. As shown in this figure, when observing the coil portion 16 from the thickness direction of the belt member 34, the shape is formed in a substantially V-shaped (U-shaped) shape that is open on the short side direction side (axial side) of the belt member 34 and closed on the other short side direction side (axial other side).

[0022] Specifically, the coil portion 16 includes: a first straight portion A1 that inclines toward the other axial side as it goes toward one circumferential side; and a second straight portion A2 that extends from the end portion on the circumferential one side of the first straight portion A1 toward the other axial side. Further, the coil portion 16 includes: a third straight portion A3 that inclines toward the other axial side as it goes from the end portion on the side opposite to the first straight portion A2 of the second straight portion A2 toward one circumferential side; and a fourth straight portion A4 that inclines toward one axial side as it goes from the end portion on the side opposite to the second straight portion A2 of the third straight portion A3 toward one circumferential side. Further, the coil portion 16 includes: a fifth straight portion A5 that extends from the end portion on the side opposite to the third straight portion A3 of the fourth straight portion A4 toward one axial side; and a sixth straight portion A6 that inclines toward one axial side as it goes from the end portion on the side opposite to the fourth straight portion A4 of the fifth straight portion A5 toward one circumferential side. Further, in the following description, the first straight portion A1 to the sixth straight portion A6 are sometimes referred to as the conductor portion 16B. In the coil body 32 of this structure, the conductor portion 16B is configured to be regularly arranged in the circumferential direction.

[0023] Here, as Figure 4 , Figure 6 and Figure 7 shown, the first straight portion A1, the second straight portion A2, and the third straight portion A3 are formed on the side of the surface 34A (radially inner surface) of the belt member 34. Further, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 are formed on the side of the other surface 34B (radially outer surface) of the belt member 34. The third straight portion A3 and the fourth straight portion A4 are electrically connected via a through hole or a through hole (not shown) that penetrates the belt member 34. Further, the portion of the coil portion 16 formed on the surface 34A of the belt member 34 is represented by a solid line. Further, the portion of the coil portion 16 formed on the other surface 34B of the belt member 34 is represented by a dashed line.

[0024] Further, the second straight portion A2 and the fifth straight portion A5 described above are sometimes referred to as the vertical portion 36. Further, the first straight portion A1 and the sixth straight portion A6 are sometimes referred to as the coil end portion 38A of one coil side end, and the third straight portion A3 and the fourth straight portion A4 are referred to as the connection portion 38B of the other coil side end. The circumferential interval between the first straight portion A1 and the sixth straight portion A6 gradually widens as it goes toward one axial side.

[0025] In addition, the first straight portion A1, the second straight portion A2, the third straight portion A3, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 of the coil portion 16 are circumferentially divided into two parts. Specifically, the first straight portion A1, the second straight portion A2, the third straight portion A3, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 of the coil portion 16 are divided into two parts in a direction orthogonal to their respective extending directions. In addition, in the following description, the portion of the first straight portion A1 disposed on the central side in the circumferential direction of the coil portion 16 is referred to as "the first straight portion A1 (inner)", and the portion of the first straight portion A1 disposed on the side opposite to the central side in the circumferential direction of the coil portion 16 is referred to as "the first straight portion A1 (outer)". In addition, for the second straight portion A2, the third straight portion A3, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6, the description is also made by setting (inner) or (outer) at the end of the symbol in the same manner. In addition, in each figure, in consideration of the visibility of the drawing, there are parts where the representation of (inner) or (outer) is omitted.

[0026] As Figure 6 shown, the first straight portion A1 (inner) and the first straight portion A1 (outer) are separated by a slit 60 formed therebetween and extend parallel to each other.

[0027] In addition, the second straight portion A2 (inner) and the second straight portion A2 (outer) are separated by a slit 60 formed therebetween and extend parallel to each other. In addition, the second straight portion A2 (inner) and the second straight portion A2 (outer) are respectively connected to the first straight portion A1 (inner) and the first straight portion A1 (outer).

[0028] In addition, the third straight portion A3 (inner) and the third straight portion A3 (outer) are separated by a slit 60 formed therebetween and extend parallel to each other. In addition, the third straight portion A3 (inner) and the third straight portion A3 (outer) are respectively connected to the second straight portion A2 (inner) and the second straight portion A2 (outer).

[0029] In addition, the fourth straight portion A4 (inner) and the fourth straight portion A4 (outer) are separated by a slit 60 formed therebetween and extend parallel to each other. In addition, the fourth straight portion A4 (inner) and the fourth straight portion A4 (outer) are respectively connected to the third straight portion A3 (inner) and the third straight portion A3 (outer).

[0030] In addition, the fifth straight portion A5 (inner) and the fifth straight portion A5 (outer) are separated by a slit 60 formed therebetween and extend parallel to each other. In addition, the fifth straight portion A5 (inner) and the fifth straight portion A5 (outer) are respectively connected to the fourth straight portion A4 (inner) and the fourth straight portion A4 (outer).

[0031] In addition, the sixth straight portion A6(inner) and the sixth straight portion A6(outer) are separated by a slit 60 formed therebetween and extend parallel to each other. Further, the sixth straight portion A6(inner) and the sixth straight portion A6(outer) are connected to the fifth straight portion A5(inner) and the fifth straight portion A5(outer), respectively.

[0032] The end portion of the first straight portion A1(inner) on the side opposite to the second straight portion A2(inner) and the end portion of the first straight portion A1(outer) on the side opposite to the second straight portion A2(outer) are connected by a first connection portion 62. In addition, the first connection portion 62 forms a part of the first straight portion A1. Further, the end portion of the sixth straight portion A6(inner) on the side opposite to the fifth straight portion A5(inner) and the end portion of the sixth straight portion A6(outer) on the side opposite to the fifth straight portion A5(outer) are connected by a second connection portion 64. In addition, the second connection portion 64 forms a part of the sixth straight portion A6. Thus, a closed circuit 66 is formed, and the closed circuit 66 is formed by connecting the path constituted by the first straight portion A1(outer), the second straight portion A2(outer), the third straight portion A3(outer), the fourth straight portion A4(outer), the fifth straight portion A5(outer), and the sixth straight portion A6(outer) and the path constituted by the first straight portion A1(inner), the second straight portion A2(inner), the third straight portion A3(inner), the fourth straight portion A4(inner), the fifth straight portion A5(inner), and the sixth straight portion A6(inner) through the first connection portion 62 and the second connection portion 64.

[0033] In addition, in the example described above, an example in which each part of the coil portion 16 is divided into two parts in the circumferential direction via the slit 60 has been described, but the present disclosure is not limited thereto. For example, as Figure 7 shown, it may also be configured such that each part of the coil portion 16 is not divided in the circumferential direction. In addition, it may also be configured such that each part of the coil portion 16 is divided into three or more parts in the circumferential direction via the slit 60. Further, it may also be configured such that a part of the coil portion 16 is divided in the circumferential direction via the slit 60.

[0034] As Figure 8 and Figure 9 shown, the other coil portions 16 constituting the U phase are also configured in the same manner as the coil portion 16 shown in Figure 6 That is, all the coil portions 16 constituting the U phase are configured to be substantially the same.

[0035] Figure 8Shows a plurality of coil portions 16 of the U-phase formed on the belt member 34. As shown in this figure, half of the plurality of coil portions 16 are connected in series. In addition, these coil portions 16 connected in series are referred to as the first coil group 42U1 of the U-phase. In addition, the remaining half of the plurality of coil portions 16 are connected in series. In addition, these coil portions 16 connected in series are referred to as the second coil group 42U2 of the U-phase. And, the coil group 42U of the U-phase is composed of the first coil group 42U1 of the U-phase and the second coil group 42U2 of the U-phase. In addition, the first coil group 42U1 of the U-phase and the second coil group 42U2 of the U-phase are connected in parallel.

[0036] Here, Figure 9 Shows a schematic diagram in which a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase and a plurality of coil portions 16 constituting the second coil group 42U2 of the U-phase are axially offset. As shown in this figure, a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase are arranged at a predetermined interval in the circumferential direction. And, the first connection portion 62 of one coil portion 16 adjacent in the circumferential direction is connected to the second connection portion 64 of another coil portion 16 via a via hole or a through hole or the like.

[0037] A plurality of coil portions 16 constituting the second coil group 42U2 of the U-phase are arranged at a predetermined interval in the circumferential direction in the same manner as a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase. And, the first connection portion 62 of one coil portion 16 adjacent in the circumferential direction is connected to the second connection portion 64 of another coil portion 16 via a via hole or a through hole or the like.

[0038] Here, a plurality of coil portions 16 constituting the second coil group 42U2 of the U-phase are arranged offset to one side in the circumferential direction with respect to a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase. This offset distance corresponds to the interval in the circumferential direction between the second straight portion A2 and the fifth straight portion A5 of the coil portion 16. Thereby, the fifth straight portion A5 of the coil portion 16 of the first coil group 42U1 of the U-phase and the second straight portion A2 of the coil portion 16 of the second coil group 42U2 of the U-phase are arranged to overlap in the radial direction with the belt member 34 interposed therebetween. In addition, the second straight portion A2 of the coil portion 16 of the first coil group 42U1 of the U-phase and the fifth straight portion A5 of the coil portion 16 of the second coil group 42U2 of the U-phase are arranged to overlap in the radial direction with the belt member 34 interposed therebetween.

[0039] In addition, the first connection portion 62 of the coil portion 16 arranged on the outermost side in the circumferential direction among a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase becomes the input point 43 connected to the power supply. In addition, the second connection portion 64 of the coil portion 16 arranged on the innermost side in the circumferential direction among a plurality of coil portions 16 constituting the first coil group 42U1 of the U-phase becomes the neutral point 44.

[0040] Further, the first connection part 62 of the coil part 16 arranged on the outermost circumferential side among the plurality of coil parts 16 constituting the second coil group 42U2 of the U-phase becomes the neutral point 44. Further, the second connection part 64 of the coil part 16 arranged on the innermost circumferential side among the plurality of coil parts 16 constituting the second coil group 42U2 of the U-phase becomes the input point 43 connected to the power supply.

[0041] Further, although the detailed description of the reference numerals is omitted, as Figure 4 shown, the coil group 42V of the V-phase has the same structure as the coil group 42U of the U-phase except for the following points. The coil group 42V of the V-phase is composed of the first coil group of the V-phase and the second coil group of the V-phase. Further, the first coil group of the V-phase and the second coil group of the V-phase are connected in parallel. Here, the first connection part 62 of the coil part 16 arranged on the outermost circumferential side among the plurality of coil parts 16 constituting the first coil group of the V-phase becomes the neutral point 44. Further, the second connection part 64 of the coil part 16 arranged on the innermost circumferential side among the plurality of coil parts 16 constituting the first coil group of the V-phase becomes the input point 43 connected to the power supply. Further, the first connection part 62 of the coil part 16 arranged on the outermost circumferential side among the plurality of coil parts 16 constituting the second coil group of the V-phase becomes the input point 43 connected to the power supply. Further, the second connection part 64 of the coil part 16 arranged on the innermost circumferential side among the plurality of coil parts 16 constituting the second coil group of the V-phase becomes the neutral point 44.

[0042] Further, the coil group 42W of the W-phase has the same structure as the coil group 42U of the U-phase. The coil group 42W of the W-phase is composed of the first coil group of the W-phase and the second coil group of the W-phase. Further, the first coil group of the W-phase and the second coil group of the W-phase are connected in parallel. Here, the first connection part 62 of the coil part 16 arranged on the outermost circumferential side among the plurality of coil parts 16 constituting the first coil group of the W-phase becomes the input point 43 connected to the power supply. Further, the second connection part 64 of the coil part 16 arranged on the innermost circumferential side among the plurality of coil parts 16 constituting the first coil group of the W-phase becomes the neutral point 44. Further, the first connection part 62 of the coil part 16 arranged on the outermost circumferential side among the plurality of coil parts 16 constituting the second coil group of the W-phase becomes the neutral point 44. Further, the second connection part 64 of the coil part 16 arranged on the innermost circumferential side among the plurality of coil parts 16 constituting the second coil group of the W-phase becomes the input point 43 connected to the power supply.

[0043] As Figure 4As shown, a plurality of coil portions 16 that constitute the coil group 42V of the V-phase are arranged offset in the circumferential direction by one side with respect to the plurality of coil portions 16 that constitute the coil group 42U of the U-phase. Further, a plurality of coil portions 16 that constitute the coil group 42W of the W-phase are arranged offset in the circumferential direction by one side with respect to the plurality of coil portions 16 that constitute the coil group 42V of the V-phase. Thus, the coil portions 16U of the U-phase, the coil portions 16V of the V-phase, and the coil portions 16W of the W-phase are arranged in this order in the circumferential direction. Further, in the following description, the coil portion 16U of the U-phase may be simply referred to as the coil portion 16U, the coil portion 16V of the V-phase may be simply referred to as the coil portion 16V, and the coil portion 16W of the W-phase may be simply referred to as the coil portion 16W.

[0044] The input lines 70 extend toward the axial direction from the input points 43 of the coil portions 16U, 16V, and 16W disposed at the end on the other side in the circumferential direction of the belt member 34. Further, the input lines 70 extend toward the axial direction from the input points 43 of the coil portions 16U, 16V, and 16W disposed at the end on the one side in the circumferential direction of the belt member 34.

[0045] The neutral points 44 of the coil portions 16U, 16V, and 16W disposed at the end on the other side in the circumferential direction of the belt member 34 are connected to each other via the neutral point connection pattern portion 72 formed on the belt member 34. Further, the neutral points 44 of the coil portions 16U, 16V, and 16W disposed at the end on the one side in the circumferential direction of the belt member 34 are connected to each other via the neutral point connection pattern portion 72 formed on the belt member 34.

[0046] Here, Figure 10 A part of the cross-section of the belt member 34 and the plurality of coil portions 16 along the A-A line shown in Figure 4 is shown. Further, Figure 10 the cross-section shown is the cross-section at the end on the other side in the circumferential direction of the belt member 34. As Figure 10 shown, in this part, the second straight portion A2 (outer) of the coil portion 16U, the second straight portion A2 (inner) of the coil portion 16U, the second straight portion A2 (outer) of the coil portion 16V, the second straight portion A2 (inner) of the coil portion 16V, the second straight portion A2 (outer) of the coil portion 16W, and the second straight portion A2 (inner) of the coil portion 16W are formed in this order on the one side surface 34A of the belt member 34.

[0047] In addition, Figure 11 a part of the cross-section of the belt member 34 and the plurality of coil portions 16 along the A-A line shown in Figure 4 is shown. Further, this Figure 11 shown cross-section is the cross-section corresponding to the range indicated by the arrow E in Figure 4 . In Figure 11In the cross-section shown, the second straight portion A2 (outer) of the coil portion 16U, the second straight portion A2 (inner) of the coil portion 16U, the second straight portion A2 (outer) of the coil portion 16V, the second straight portion A2 (inner) of the coil portion 16V, the second straight portion A2 (outer) of the coil portion 16W, the second straight portion A2 (inner) of the coil portion 16W, the second straight portion A2 (outer) of the coil portion 16U, and the second straight portion A2 (inner) of the coil portion 16U are formed in this order on the surface 34A side of one side of the belt member 34. In addition, in Figure 11 In the cross-section shown, the fifth straight portion A5 (inner) of the coil portion 16U, the fifth straight portion A5 (outer) of the coil portion 16U, the fifth straight portion A5 (inner) of the coil portion 16V, the fifth straight portion A5 (outer) of the coil portion 16V, the fifth straight portion A5 (inner) of the coil portion 16W, the fifth straight portion A5 (outer) of the coil portion 16W, the fifth straight portion A5 (inner) of the coil portion 16U, and the fifth straight portion A5 (outer) of the coil portion 16U are formed in this order on the surface 34B side of the other side of the belt member 34.

[0048] In addition, Figure 12 is shown along Figure 4 A part of the cross-section of the belt member 34 and the second straight portion A2 and the fifth straight portion A5 of the plurality of coil portions 16 obtained by cutting along the line A-A shown is shown. In addition, this Figure 12 The cross-section shown is the cross-section at the end portion on the circumferential one side of the belt member 34. In Figure 12 In the cross-section shown, the fifth straight portion A5 (inner) of the coil portion 16U, the fifth straight portion A5 (outer) of the coil portion 16U, the fifth straight portion A5 (inner) of the coil portion 16V, the fifth straight portion A5 (outer) of the coil portion 16V, the fifth straight portion A5 (inner) of the coil portion 16W, and the fifth straight portion A5 (outer) of the coil portion 16W are formed in this order on the surface 34B side of the other side of the belt member 34.

[0049] As described above, the belt member 34 is wound a plurality of times in the circumferential direction, so that the plurality of coil portions 16 are arranged at specified positions in the circumferential and radial directions. Figure 13 A part of the cross-section obtained by cutting the coil body 32 in the state where the belt member 34 is wound in the radial direction is shown. In addition, this cross-section is the cross-section of the portion corresponding to the vertical portion 36 of each coil portion 16 (refer to Figure 6 ).

[0050] In Figure 13In the cross section shown, the vertical portions 36 of the plurality of coil portions 16 are arranged at equal intervals in the circumferential direction in a state of being stacked in the radial direction. Further, in a state where the vertical portions 36 of the plurality of coil portions 16 are stacked in the radial direction, the first insulating layer 54A or the second insulating layer 54B is interposed between a pair of vertically adjacent vertical portions 36 in the radial direction. The first insulating layer 54A is a belt member 34, which is, for example, a polyimide film or insulating paper. Further, as Figures 10 to 13 shown, the second insulating layer 54B is an insulating film formed on the belt member 34 and formed so as to cover the coil portion 16, and is, for example, an insulating coating. As the insulating coating, a polyimide coating film or varnish can be used.

[0051] Here, as Figure 13 shown, a member formed by stacking each part of the vertical portions 36 of the plurality of coil portions 16 in the radial direction is referred to as a vertical portion laminate 56. That is, a member formed by stacking the second straight portion A2 (outer) of the coil portion 16U and the fifth straight portion A2 (inner) of the coil portion 16U in the radial direction, a member formed by stacking the second straight portion A2 (outer) of the coil portion 16V and the fifth straight portion A2 (inner) of the coil portion 16V in the radial direction, and a member formed by stacking the second straight portion A2 (outer) of the coil portion 16W and the fifth straight portion A2 (inner) of the coil portion 16W in the radial direction are all referred to as the vertical portion laminate 56.

[0052] As Figure 13 shown, the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (outer) of the coil portion 16U and the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (inner) of the coil portion 16U constitute the U-phase conductor group 46U arranged in this order in the circumferential direction. Further, the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (outer) of the coil portion 16V and the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (inner) of the coil portion 16V constitute the V-phase conductor group 46V arranged in this order in the circumferential direction. In addition, the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (outer) of the coil portion 16W and the vertical portion laminate 56 whose radially inner end is the second straight portion A2 (inner) of the coil portion 16W constitute the W-phase conductor group 46W arranged in this order in the circumferential direction.

[0053] (Function and Effect) Next, the function and effect of the motor 10 having the above structure will be described.

[0054] As Figure 1 , Figure 2 , Figure 4 , Figure 5As shown, in the electric motor 10, a rotating magnetic field is generated in the stator 14 by switching the energization of the coil group 42U of the U-phase, the coil group 42V of the V-phase, and the coil group 42W of the W-phase, which are part of the stator 14. Thereby, the rotor 12 rotates.

[0055] Here, the coil body 32 is configured to include a belt member 34 formed of an insulating material in a strip shape and a plurality of coil portions 16 formed on the belt member 34. Moreover, the belt member 34 is wound a plurality of times in the circumferential direction so that the plurality of coil portions 16 are arranged at specified positions in the circumferential and radial directions. With this structure, an increase in the size of the coil body 32 in the radial direction can be suppressed. As a result, an increase in the size of the electric motor 10 can be suppressed.

[0056] In addition, as Figure 4 , Figure 8 and Figure 9 shown, when viewed from the thickness direction of the belt member 34, the shapes of the plurality of coil portions 16 are formed in a substantially V shape. In addition, a first connection portion 62 of one coil portion 16 adjacent in the circumferential direction and a second connection portion 64 of another coil portion 16 are connected on one axial side of the belt member 34. In this structure, there is no need to separately provide a wiring path for connecting between the coil portions 16 on the belt member 34, and an increase in the size of the coil body 32 in the axial direction can be suppressed. As a result, an increase in the size of the electric motor 10 can be suppressed. Further, there is no need to separately provide a wiring path for connecting between the coil portions 16 on the belt member 34, so that the wiring path between the coil portions 16 can be prevented from becoming long. As a result, the resistance between the coil portions 16 is reduced, and an increase in the torque of the electric motor 10 can be achieved.

[0057] In addition, as Figure 6 and Figure 13 shown, each part of the coil portion 16 is divided into two parts in the circumferential direction by a slit 60. Thereby, the relative area between the vertical portion laminate 56 and the magnet 18 of the rotor 12 can be reduced. As a result, the eddy current generated in the vertical portion laminate 56 by the radial magnetic flux can be suppressed, and the torque of the electric motor 10 can be further increased.

[0058] In addition, as Figure 6 and Figure 9 shown, the circumferential interval between the first straight portion A1 and the sixth straight portion A6 of the coil portion 16 gradually widens toward the axial one side. Thereby, it becomes easy to connect the coil portions 16 adjacent in the circumferential direction to each other on both circumferential sides of the second straight portion A2 and the fifth straight portion A5.

[0059] In addition, the coil portions 16 of the same-phase coil groups 42U, 42V, and 42W are stacked radially to form a vertical portion stack 56. Thus, by adjusting the number of stacked coil portions 16, the same effect as adjusting the number of turns can be obtained. In addition, the number of turns refers to the number of windings of the conductive winding in the coil formed by winding the conductive winding.

[0060] (Structure for increasing the duty factor of the coil body 32) Next, the structures of the respective embodiments for increasing the duty factor of the coil body 32 will be described. In addition, in the drawings used in the following description, the hatching of the cross section is omitted.

[0061] (First Embodiment) Use Figures 14 to 18 The motor of the first embodiment will be described. In addition, in the motor of the first embodiment, the components and parts corresponding to those of the motors 10 and the like that have been described are labeled with the same symbols as the corresponding components and parts of the motors 10 and the like, and the description thereof may sometimes be omitted.

[0062] In Figure 14 and Figure 15 show cross sections obtained by radially cutting a part of the coil body 32 of the motor of the first embodiment. Specifically, Figure 14 shows a part of the belt member 34 of a specific layer and a cross section of the coil portion 16 (conductor portion 16B) formed on the belt member 34. In addition, Figure 15 shows a part of the belt members 34 of a plurality of layers and cross sections of the coil portions 16 (conductor portions 16B) respectively formed on the belt members 34 of the plurality of layers. As Figure 14 , Figure 15 and Figure 16 show, in the present embodiment, in a state where one belt member 34 and another belt member 34 are stacked radially, the conductor portions 16B formed on one belt member 34 and the conductor portions 16B formed on another belt member 34 are alternately arranged in the circumferential direction. In addition, in a state where one belt member 34 and another belt member 34 are stacked radially, a plurality of conductor portions 16B formed on one belt member 34 and a plurality of conductor portions 16B formed on another belt member 34 overlap in the circumferential direction. Thus, in the coil body 32 of the motor of the present embodiment, the duty factor can be increased compared to the structure of the coil body 32 of the aforementioned motor. In addition, the structure of the coil body 32 of the motor of the present embodiment is different from the structure of the coil body 32 of the aforementioned motor, and is configured such that a plurality of belt members 34 wound in a ring shape are stacked radially. In addition, the number of stacked layers of the coil body 32 may be appropriately set in consideration of the output required for the motor and the like.

[0063] Figure 17, a diagram showing a first layer of belt members 34 and another layer of belt members 34 radially adjacent to the first layer of belt members 34 in the coil body 32 of the motor of the present embodiment developed in a planar shape. In addition, for the first layer of belt members 34, a parenthesized symbol S1 is attached to the end of the symbol representing the first layer of belt members 34. In addition, for the other layer of belt members 34, a parenthesized symbol S2 is attached to the end of the symbol representing the other layer of belt members 34.

[0064] like Figure 17 (See also Figure 7 ), a plurality of coil portions 16 of the U phase are formed on a layer of the belt member 34 (S1). Figure 17 In FIG. 1 , each portion of the coil portion 16 formed on the surface 34A on one side of the layer of the belt member 34 (S1) is depicted with a solid line, and each portion of the coil portion 16 formed on the surface 34B on the other side of the layer of the belt member 34 (S1) is depicted with a dotted line. Figure 17 , sections 140A, 140B, and 140C are shown, which are obtained by radially cutting the end of one circumferential side, a part of the circumferential middle portion, and the end of the other circumferential side of a layer of belt member 34 (S1) at the positions corresponding to the second straight portion A2 and the fifth straight portion A5.

[0065] In detail, twenty coil portions 16U of the U phase are formed on one layer of the belt member 34 (S1). And, five coil portions 16U of the twenty coil portions 16U of the U phase become the first coil group 42U1 of the U phase connected in series. In addition, five coil portions 16U of the twenty coil portions 16U of the U phase become the second coil group 42U2 of the U phase connected in series. In addition, five coil portions 16U of the twenty coil portions 16U of the U phase become the third coil group 42U3 of the U phase connected in series. In addition, five coil portions 16U of the twenty coil portions 16U of the U phase become the fourth coil group 42U4 of the U phase connected in series.

[0066] The second coil group 42U2 of the U-phase is arranged offset in the circumferential direction by one side with respect to the first coil group 42U1 of the U-phase. The offset distance D1 is set to a size that allows another coil part 16U to be arranged between the coil part 16U of the first coil group 42U1 of the U-phase adjacent in the circumferential direction and the coil part 16U of the second coil group 42U2 of the U-phase. As an example, the offset distance D1 is set to a size slightly larger than the width dimension in the circumferential direction of the second straight part A2 of the coil part 16. In addition, each part (the first straight part A1 to the sixth straight part A6) of each coil part 16U constituting the first coil group 42U1 of the U-phase and each part (the first straight part A1 to the sixth straight part A6) of each coil part 16U constituting the second coil group 42U2 of the U-phase are arranged adjacent to each other in the circumferential direction. In addition, the first coil group 42U1 of the U-phase and the second coil group 42U2 of the U-phase are connected in parallel.

[0067] Each coil part 16U constituting the third coil group 42U3 of the U-phase and each coil part 16U constituting the fourth coil group 42U4 of the U-phase are arranged offset with respect to each coil part 16U constituting the first coil group 42U1 of the U-phase and each coil part 16U constituting the second coil group 42U2 of the U-phase, sandwiching two coil parts 16V of the V-phase and two coil parts 16W of the W-phase.

[0068] The fourth coil group 42U4 of the U-phase is arranged offset by only the distance D1 in the circumferential direction by one side with respect to the third coil group 42U3 of the U-phase. In addition, each part (the first straight part A1 to the sixth straight part A6) of each coil part 16U constituting the third coil group 42U3 of the U-phase and each part (the first straight part A1 to the sixth straight part A6) of each coil part 16U constituting the fourth coil group 42U4 of the U-phase are arranged adjacent to each other in the circumferential direction. In addition, the third coil group 42U3 of the U-phase and the fourth coil group 42U4 of the U-phase are connected in parallel.

[0069] In addition, the first coil group 42U1 of the U-phase, the second coil group 42U2 of the U-phase, the third coil group 42U3 of the U-phase, and the fourth coil group 42U4 of the U-phase are connected in parallel.

[0070] In addition, in the central part of the circumferential direction except the two ends in the circumferential direction of the one-layer belt member 34 (S1), the second straight portion A2 of one coil portion 16U of the U phase and the fifth straight portion A5 of the other coil portion 16U are staggered in the circumferential direction and are alternately arranged from the other side of the circumferential direction to one side. That is, the second straight portion A2 of one coil portion 16U of the U phase and the fifth straight portion A5 of the other coil portion 16U are arranged at different positions in the circumferential direction. In addition, in the state where the two ends in the circumferential direction of the one-layer belt member 34 (S1) overlap each other, in this part, the second straight portion A2 of one coil portion 16U of the U phase and the fifth straight portion A5 of the other coil portion 16U are also staggered in the circumferential direction and are alternately arranged from the other side of the circumferential direction to one side.

[0071] On one layer of the belt member 34 (S1), twenty coil portions 16 of the V phase are arranged to be staggered to one side in the circumferential direction with respect to the twenty coil portions 16 of the U phase. The twenty coil portions 16 of the V phase are arranged and connected in the same relationship as the twenty coil portions 16 of the U phase. In addition, on one layer of the belt member 34 (S1), twenty coil portions 16 of the W phase are arranged to be staggered to one side in the circumferential direction with respect to the twenty coil portions 16 of the V phase. The twenty coil portions 16 of the W phase are arranged and connected in the same relationship as the twenty coil portions 16 of the U phase.

[0072] A plurality of coil portions 16 of the U phase, a plurality of coil portions 16 of the V phase, and a plurality of coil portions 16 of the W phase are formed on another layer of the belt member 34 (S2). Figure 17 In the figure, the parts of the coil portion 16 formed on the surface 34A on one side of another layer of the belt member 34 (S2) are depicted with dotted lines, and the parts of the coil portion 16 formed on the surface 34B on the other side of another layer of the belt member 34 (S2) are depicted with solid lines. That is, in the coil portion 16 formed on another layer of the belt member 34 (S2), the parts corresponding to the parts of the coil portion 16 formed on the surface 34A on one side of a layer of the belt member 34 (S1) are formed on the surface 34B on the other side of another layer of the belt member 34 (S2). In addition, in the coil portion 16 formed on another layer of the belt member 34 (S2), the parts corresponding to the parts of the coil portion 16 formed on the surface 34B on the other side of a layer of the belt member 34 (S1) are formed on the surface 34B on one side of another layer of the belt member 34 (S2). In addition, in Figure 17 , sections 142A, 142B, and 142C are shown, which are obtained by radially cutting the end on one circumferential side, a part of the circumferential middle portion, and the end on the other circumferential side of another layer of belt member 34 (S2) at the positions corresponding to the second straight portion A2 and the fifth straight portion A5.

[0073] The structure of the other layer of the belt member 34 (S2) and the structure of the plurality of coil portions 16 formed on the other layer of the belt member 34 (S2) are the same as the structure of the one layer of the belt member 34 (S1) and the structure of the plurality of coil portions 16 formed on the one layer of the belt member 34 (S1) except for the above-mentioned points. In addition, the pattern (circuit type) of the plurality of coil portions 16 formed on the other layer of the belt member 34 (S2) is consistent with the pattern (circuit type) of the plurality of coil portions 16 formed on the one layer of the belt member 34 (S1).

[0074] Figure 18 It is shown in Figure 17 The diagram shows a state where one layer of the belt member 34 (S1) overlaps another layer of the belt member 34 (S2) (stacked state). Figure 18 144A, 144B, 144C are shown in which the end of one circumferential side, a part of the circumferential center, and the end of the other circumferential side of a layer of belt member 34 (S1) and the end of one circumferential side, a part of the circumferential center, and the end of the other circumferential side of another layer of belt member 34 (S2) are cut radially at the positions corresponding to the second straight line portion A2 and the fifth straight line portion A5. As shown in the figure, in a state where a layer of belt member 34 (S1) and another layer of belt member 34 (S2) overlap, the parts of the coil portion 16 (conductor portion 16B) formed on the layer of belt member 34 (S1) and the parts of the coil portion 16 (conductor portion 16B) formed on the other layer of belt member 34 (S2) are alternately arranged in the circumferential direction. In addition, when one layer of the belt member 34 (S1) overlaps with another layer of the belt member 34 (S2), the plurality of conductor portions 16B formed on the one layer of the belt member 34 (S1) overlap with the plurality of conductor portions 16B formed on the other layer of the belt member 34 in the circumferential direction. Thus, in the coil body 32 of the motor of the present embodiment, the space factor can be improved.

[0075] In addition, in the coil body 32 of the motor of the present embodiment, the circumferential spacing of the conductor portion 16B on the band member 34 can be widened. Thus, for example, when a manufacturing method is adopted in which the conductor portion 16B is formed on the band member 34 by etching, the restriction on the thickness of the conductor portion 16B can be reduced. Thus, the thickness of the conductor portion 16B can be increased, thereby also improving the space factor of the coil body 32.

[0076] In the motor coil body 32 of the present embodiment, the patterns (circuit types) of the plurality of coil portions 16 formed on the tape member 34 of each layer are identical. Thus, the patterns of the plurality of coil portions 16 of each layer can be designed similarly, thereby reducing the design man-hours.

[0077] In addition, if Figure 14 and Figure 15As shown, in the coil body 32 of the motor according to the present embodiment, the width dimension W1 in the circumferential direction of the conductor portion 16B formed on one layer of the belt member 34 (S1) gradually decreases as it approaches the other layer of the belt member 34 (S2). Further, the width dimension W1 in the circumferential direction of the conductor portion 16B formed on the other layer of the belt member 34 gradually decreases as it approaches the one layer of the belt member 34. Thus, when the one layer of the belt member 34 (S1) overlaps with the other layer of the belt member 34 (S2), it is possible to easily arrange the plurality of conductor portions 16B formed on the other layer of the belt member 34 between the plurality of conductor portions 16B formed on the one layer of the belt member 34 (S1).

[0078] (Second Embodiment) Use Figures 19 to 23 The motor according to the second embodiment will be described. In addition, in the motor according to the second embodiment, components and parts corresponding to those of the motor 10 and the like that have been described are denoted by the same reference numerals as the corresponding components and parts of the motor 10 and the like, and the description thereof may sometimes be omitted.

[0079] Figures 19 to 23 is a diagram for explaining the structure of the coil body 32 of the motor according to the second embodiment, and is a diagram corresponding to the diagrams Figures 14 to 18 used in the description of the motor according to the first embodiment, respectively. As shown in these diagrams, the structure of the coil body 32 of the motor according to the second embodiment is the same as that of the coil body 32 of the motor according to the first embodiment, except for the points described below.

[0080] As Figure 20 and Figure 22 shown, in the coil body 32 of the motor according to the second embodiment, at the circumferential middle portion of the one layer of the belt member 34 (S1) except for the circumferential both end portions, the second straight portion A2 of one coil portion 16U in the U-phase and the fifth straight portion A5 of the other coil portion 16U are arranged at the same circumferential position. Further, in a state where the circumferential both end portions of the one layer of the belt member 34 (S1) overlap each other, at this portion, the second straight portion A2 of one coil portion 16U in the U-phase and the fifth straight portion A5 of the other coil portion 16U are also arranged at the same circumferential position.

[0081] In addition, the plurality of coil portions 16V in the V-phase and the plurality of coil portions 16W in the W-phase formed on the one layer of the belt member 34 (S1) have the same structure as the plurality of coil portions 16U in the U-phase. Further, the plurality of coil portions 16 formed on the other layer of the belt member 34 (S2) have the same structure as the plurality of coil portions 16 formed on the one layer of the belt member 34 (S1).

[0082] Figure 23 shows Figure 22A diagram showing a state where one layer of the belt member 34 (S1) overlaps with another layer of the belt member 34 (S2) (a stacked state). As shown in this diagram, in a state where one layer of the belt member 34 (S1) overlaps with another layer of the belt member 34 (S2), the respective portions (conductor portions 16B) of the coil portion 16 formed on the one layer of the belt member 34 (S1) and the respective portions (conductor portions 16B) of the coil portion 16 formed on the other layer of the belt member 34 (S2) are alternately arranged in the circumferential direction. Further, in a state where one layer of the belt member 34 (S1) overlaps with another layer of the belt member 34 (S2), a plurality of conductor portions 16B formed on the one layer of the belt member 34 (S1) and a plurality of conductor portions 16B formed on the other layer of the belt member 34 overlap in the circumferential direction. Thus, in the coil body 32 of the motor according to the present embodiment, the duty factor can be increased.

[0083] (Third Embodiment) Use Figure 24 The motor according to the third embodiment will be described. Additionally, in the motor according to the third embodiment, components and parts corresponding to those of the motor 10 etc. that have been described are denoted by the same reference numerals as the corresponding components and parts of the motor 10 etc., and the description thereof may sometimes be omitted.

[0084] In Figure 24 a schematic cross-sectional view taken along a radial section of the stator 14 of the motor according to the third embodiment is shown. As shown in this diagram, the structure of the coil body 32 which forms a part of the stator 14 is the same as the structure of the coil body 32 of the motor according to the aforementioned first embodiment.

[0085] Here, in the stator 14 of the motor according to the present embodiment, the conductor portion 16B formed on the belt member 34 of the layer disposed opposite to the stator core portion 26 is in concavo-convex engagement with the stator core portion 26. Specifically, a plurality of fitting convex portions 26A protruding radially outward are formed on the outer peripheral portion of the stator core portion 26. And these fitting convex portions 26A are respectively fitted between a pair of conductor portions 16B formed on the belt member 34 of the layer disposed opposite to the stator core portion 26. By configuring in such a manner, the coil body 32 can be fixed relative to the stator core portion 26. Further, the plurality of fitting convex portions 26A can function like pole teeth. Additionally, a pole tooth refers to a part of the stator core, and in a structure where a conductive winding is wound to form a coil, the coil is formed around a part of the stator core. In the stator 14 of the motor according to the present embodiment, the conductor portion 16B formed on the belt member 34 of the layer disposed opposite to the stator core portion 26 enters the state of the outer peripheral portion of the stator core portion 26, thereby being able to suppress an increase in the distance from the outer peripheral surface of the stator core portion 26 to the radially outer surface of the coil body 32.

[0086] (Fourth Embodiment) Use Figure 25A description will be given of the motor according to the fourth embodiment. In addition, in the motor according to the fourth embodiment, components and parts corresponding to those of the motor 10 and the like that have already been described are denoted by the same reference numerals as those of the components and parts corresponding to the motor 10 and the like, and the description thereof will sometimes be omitted.

[0087] In Figure 25 is shown a schematic cross-sectional view of the stator 14 of the motor according to the fourth embodiment taken along a radial plane. As shown in this figure, the structure of the stator 14 is the same as that of the stator 14 of the motor according to the third embodiment described above, except for the points described later.

[0088] In the coil body 32 of the motor according to the fourth embodiment, the width dimension W1 in the circumferential direction of the conductor portion 16B that is concavo-convexly fitted with the stator core portion 26 is set to a dimension smaller than the width dimension W1 in the circumferential direction of the conductor portion 16B that is not concavo-convexly fitted with the stator core portion 26. Specifically, the width dimension W1 in the circumferential direction of the conductor portion 16B formed on the surface on the stator core portion 26 side in the belt member 34 is set to a dimension smaller than the width dimension W1 in the circumferential direction of the conductor portion 16B formed on the surface on the side opposite to the stator core portion 26 in the belt member 34. In addition, the width dimension W2 in the circumferential direction of the fitting convex portion 26A is set to a dimension larger than the width dimension in the circumferential direction of the fitting convex portion 26A of the motor according to the third embodiment described above. Further, the width dimension W1 in the circumferential direction of the conductor portion 16B that is concavo-convexly fitted with the stator core portion 26 is set to a dimension smaller than the width dimension W2 in the circumferential direction of the fitting convex portion 26A. By configuring in this way, in the stator 14 of the motor according to the fourth embodiment, compared with the stator 14 of the motor according to the third embodiment, an effect of shortening the magnetic gap G1 between the magnet 18 and the stator core portion 26 is obtained. Thereby, the output of the motor can be improved.

[0089] (Fifth Embodiment) Use Figure 26 A description will be given of the motor according to the fifth embodiment. In addition, in the motor according to the fifth embodiment, components and parts corresponding to those of the motor 10 and the like that have already been described are denoted by the same reference numerals as those of the components and parts corresponding to the motor 10 and the like, and the description thereof will sometimes be omitted.

[0090] In Figure 26 is shown a schematic cross-sectional view of the stator 14 of the motor according to the fifth embodiment taken along a radial plane. As shown in this figure, the structure of the coil body 32 that forms a part of the stator 14 is the same as the structure of the coil body 32 of the motor according to the second embodiment described above. In addition, the structure of the stator core portion 26 that forms a part of the stator 14 is the same as the structure of the stator core portion 26 of the motor according to the third embodiment described above.

[0091] In the stator 14 of the motor according to the fifth embodiment described above, the same effects as those of the stator 14 of the motor according to the third embodiment described above can also be obtained.

[0092] (Sixth Embodiment) Use Figure 27 The motor according to the sixth embodiment will be described. In addition, in the motor according to the sixth embodiment, components and parts corresponding to those of the motor 10 etc. that have been described are labeled with the same symbols as the corresponding components and parts of the motor 10 etc., and the description thereof may sometimes be omitted.

[0093] In Figure 27 FIG. shows a schematic cross-sectional view taken along the radial direction of the stator 14 of the motor according to the sixth embodiment. As shown in this figure, in the coil body 32 which forms a part of the stator 14, the width dimension W1 in the circumferential direction of the conductor portion 16B formed on the belt member 34 disposed closest to the stator core portion 26 is set to a dimension smaller than the width dimension W1 in the circumferential direction of the conductor portion 16B formed on the other belt members 34. In addition, the structure of the stator core portion 26 which forms a part of the stator 14 is the same as the structure of the stator core portion 26 of the motor according to the fourth embodiment described above.

[0094] In the stator 14 of the motor according to the sixth embodiment described above, the same effects as those of the stator 14 of the motor according to the fourth embodiment described above can also be obtained.

[0095] (Seventh Embodiment) Use Figure 28 The motor according to the seventh embodiment will be described. In addition, in the motor according to the seventh embodiment, components and parts corresponding to those of the motor 10 etc. that have been described are labeled with the same symbols as the corresponding components and parts of the motor 10 etc., and the description thereof may sometimes be omitted.

[0096] In Figure 28 FIG. shows a schematic cross-sectional view taken along the radial direction of the stator 14 of the motor according to the seventh embodiment. As shown in this figure, the structure of the coil body 32 which forms a part of the stator 14 is the same as the structure of the coil body 32 of the motor according to the first embodiment described above except for the points described later.

[0097] In the coil body 32 of the motor according to the present embodiment, the thickness dimension T1 of the conductor portion 16B formed on the belt member 34 of the layer disposed on the magnet 18 side is set to a dimension smaller than the thickness dimension T1 of the conductor portion 16B formed on the belt member 34 of the layer disposed on the side opposite to the magnet 18. In addition, the thickness dimension T1 of the conductor portion 16B refers to the dimension of the conductor portion 16B in the direction (radial direction) in which the coil body 32 faces the magnet 18.

[0098] In the coil body 32 of the motor according to the present embodiment, five belt members 34 are stacked in the radial direction. Here, the five belt members 34 are sequentially referred to as the first-layer belt member 34, the second-layer belt member 34, the third-layer belt member 34, the fourth-layer belt member 34, and the fifth-layer belt member 34 from the stator core portion 26 side to the magnet 18 side.

[0099] The thickness dimension T1 of the conductor portion 16B disposed between the second-layer belt member 34 and the third-layer belt member 34 is set to a dimension smaller than the thickness dimension T1 of the conductor portion 16B disposed between the first-layer belt member 34 and the second-layer belt member 34. Further, the thickness dimension T1 of the conductor portion 16B disposed between the third-layer belt member 34 and the fourth-layer belt member 34 is set to a dimension smaller than the thickness dimension T1 of the conductor portion 16B disposed between the second-layer belt member 34 and the third-layer belt member 34. Further, the thickness dimension T1 of the conductor portion 16B disposed between the fourth-layer belt member 34 and the fifth-layer belt member 34 is set to a dimension smaller than the thickness dimension T1 of the conductor portion 16B disposed between the third-layer belt member 34 and the fourth-layer belt member 34. Here, Figure 28 The arrow T2 shown indicates the linked magnetic flux, and the arrow T3 indicates the leakage magnetic flux. By reducing the thickness dimension T1 of the conductor portion 16B formed on the belt member 34 of the layer on the magnet 18 side where the leakage magnetic flux T3 is linked in the circumferential direction, so-called eddy current loss can be reduced. Further, by increasing the thickness dimension T1 of the conductor portion 16B formed on the belt member 34 of the layer on the side opposite to the magnet 18 where the circumferential linked magnetic flux is less, so-called direct current loss can be reduced.

[0100] (Eighth Embodiment) Use Figure 29 The motor according to the eighth embodiment will be described. In addition, in the motor according to the eighth embodiment, members and parts corresponding to those of the motor 10 and the like that have been described are denoted by the same reference numerals as the corresponding members and parts of the motor 10 and the like, and the description thereof may sometimes be omitted.

[0101] In Figure 29 FIG. shows a schematic cross-sectional view of the stator 14 of the motor according to the eighth embodiment taken along the radial direction. As shown in this figure, the basic structure of the coil body 32 that forms a part of the stator 14 is the same as the structure of the coil body 32 of the motor according to the aforementioned second embodiment. Further, in the coil body 32 of the motor according to the present embodiment, the thickness dimension T1 of each conductor portion 16B is set to the same dimension as the coil body 32 of the motor according to the aforementioned seventh embodiment.

[0102] In the coil body 32 of the motor according to the present embodiment described above, the same effects as those of the coil body 32 of the motor according to the seventh embodiment can also be obtained.

[0103] (Ninth Embodiment) Use Figure 30 and Figure 31 to describe the motor of the ninth embodiment. In addition, in the motor of the ninth embodiment, components and parts corresponding to those of the motor 10 etc. which have been described are labeled with the same symbols as the corresponding components and parts of the motor 10 etc., and the description thereof may sometimes be omitted.

[0104] Figure 30 and Figure 31 are diagrams for describing the structure of the coil body 32 of the motor of the ninth embodiment, and are diagrams corresponding to Figure 22 and Figure 23 respectively used in the description of the motor of the second embodiment. As shown in these diagrams, the structure of the coil body 32 of the motor of the ninth embodiment is the same as that of the coil body 32 of the motor of the second embodiment except for the points described later.

[0105] As Figure 30 shown, in the coil body 32 of the motor of the present embodiment, the first coil group 42U1 of the U phase and the fourth coil group 42U4 are connected in series via the return conductor pattern portion 78. In addition, the second coil group 42U2 of the U phase and the third coil group 42U3 are connected in series via the return conductor pattern portion 78.

[0106] In the coil body 32 of the present embodiment described above, the same effects as those of the coil body 32 of the motor of the aforementioned second embodiment can be obtained. In addition, in the coil body 32 of the present embodiment, the effect of increasing the number of turns with respect to the coil body 32 of the motor of the aforementioned second embodiment can be obtained. In addition, the number of turns refers to the number of windings of the winding formed by winding a conductive winding.

[0107] (Tenth and Eleventh Embodiments) Use Figure 32 and Figure 33 to describe the motors of the tenth and eleventh embodiments. In addition, in the motors of the tenth and eleventh embodiments, components and parts corresponding to those of the motor 10 etc. which have been described are labeled with the same symbols as the corresponding components and parts of the motor 10 etc., and the description thereof may sometimes be omitted.

[0108] As Figure 32 shown, in the coil body 32 of the motor of the tenth embodiment, the end portion 34D on one circumferential side of the belt member 34 overlaps with the end portion 34C on the other circumferential side, so that each input wire 70 disposed at the end portion 34D on one circumferential side of the belt member 34 is connected to each input wire 70 disposed at the end portion 34C on the other circumferential side of the belt member 34. As an example, this structure can be applied to the coil body 32 of the motor of the aforementioned second embodiment.

[0109] As Figure 33 shown, in the coil body 32 of the motor according to the eleventh embodiment, the end portion 34D on one circumferential side of the belt member 34 overlaps with the end portion 34C on the other circumferential side, so that each input wire 70 disposed at the end portion 34D on one circumferential side of the belt member 34 is connected to each input wire 70 disposed at the end portion 34C on the other circumferential side of the belt member 34. As an example, this structure can be applied to the coil body 32 of the motor according to the foregoing first embodiment.

[0110] (An example of the manufacturing method of the coil body 32) Next, an example of the manufacturing method of the coil body 32 will be described using Figures 34 to 39 .

[0111] In Figure 34 , a cross-section of the first-layer belt member 34 in a state before being wound into a ring shape and the coil portion 16 formed on the belt member 34 is shown. In addition, the structure of the first-layer belt member 34 and the coil portion 16 formed on the belt member 34 is the same as the structure of the belt member 34 and the coil portion 16 formed on the belt member 34 of the motor according to the second embodiment. Furthermore, the belt member 34 is wound into a ring shape from the end portion 34D side on one circumferential side. Specifically, as Figure 35 shown, the first-layer belt member 34 is wound into a ring shape along the winding mandrel 146 as a mold from the end portion 34D side on one circumferential side. And the end portion 34D on one circumferential side of the first-layer belt member 34 overlaps and engages with the end portion 34C on the other circumferential side, so that the first-layer belt member 34 maintains the state of being wound into a ring shape. In addition, through the same steps, the second-layer belt member 34 is wound into a ring shape along the first-layer belt member 34.

[0112] In Figure 36 , a cross-section of the first-layer belt member 34 in a state before being wound into a ring shape and the coil portion 16 formed on the belt member 34 is shown. In addition, the structure of the first-layer belt member 34 and the coil portion 16 formed on the belt member 34 is the same as the structure of the belt member 34 and the coil portion 16 formed on the belt member 34 of the motor according to the first embodiment. As Figure 37 shown, the first-layer belt member 34 is wound into a ring shape along the winding mandrel 146 from the end portion 34D side on one circumferential side. And the end portion 34D on one circumferential side of the first-layer belt member 34 overlaps and engages with the end portion 34C on the other circumferential side, so that the first-layer belt member 34 maintains the state of being wound into a ring shape. In addition, through the same steps, the second-layer belt member 34 is wound into a ring shape along the first-layer belt member 34.

[0113] Figure 38 shows the one related to Figure 35 and Figure 37A winding mandrel 148 having a structure different from that of the winding mandrel 146 shown. A plurality of winding engaging convex portions 148A protruding radially outward are formed on the outer peripheral portion of the winding mandrel 148. And, when using this winding mandrel 148, while engaging the winding engaging convex portions 148A between a pair of conductor portions 16B formed on the first-layer belt member 34, the first-layer belt member 34 can be wound around the winding mandrel 148. Thereby, when winding the first-layer belt member 34 around the winding mandrel 148, it is possible to suppress the first-layer belt member 34 from shifting and sliding in the circumferential direction with respect to the winding mandrel 148.

[0114] Figure 39 A stator core portion 26 having the same structure as the stator core portion 26 of the motor of the third embodiment is shown. In this structure, while engaging the engaging convex portions 26A between a pair of conductor portions 16B formed on the first-layer belt member 34, the first-layer belt member 34 can be wound around the stator core portion 26. Thereby, when winding the first-layer belt member 34 around the stator core portion 26, it is possible to suppress the first-layer belt member 34 from shifting and sliding in the circumferential direction with respect to the stator core portion 26.

[0115] (Twelfth Embodiment to Fifteenth Embodiment) Use Figure 40 The motor of the twelfth embodiment will be described. In addition, in the motor of the twelfth embodiment, components and parts corresponding to those of the motor 10 and the like that have been described are labeled with the same symbols as the corresponding components and parts of the motor 10 and the like, and their descriptions may sometimes be omitted.

[0116] Figure 40 The coil body 32 of the motor of the twelfth embodiment is shown. In the coil body 32 of the motor of the present embodiment, a plurality of soft magnetic portions 150 are formed on the belt member 34. The plurality of soft magnetic portions are formed of a soft magnetic material and are arranged in the circumferential direction. In the coil body 32 of the motor of the present embodiment, the plurality of soft magnetic portions 150 are formed only on the surface of the belt member 34 on the side of the stator core portion 26. In addition, the plurality of soft magnetic portions 150 are arranged between a pair of conductor portions 16B adjacent in the circumferential direction. By configuring in this way, the plurality of soft magnetic portions 150 can function like pole teeth in the same manner as the aforementioned engaging convex portions 26A (refer to Figure 24 ).

[0117] In addition, the arrangement of the plurality of soft magnetic portions 150 can be appropriately set in consideration of the characteristics required for the motor. For example, it can be configured like the coil body 32 of the motor of the thirteenth embodiment shown in Figure 41 such that only the plurality of soft magnetic portions 150 are formed on the first-layer belt member 34 and the third-layer belt member 34. In addition, it can be like Figure 42As shown in the fourteenth embodiment of the motor coil body 32, a plurality of soft magnetic parts 150 and a plurality of conductor parts 16B are formed on the first layer belt member 34 and the third layer belt member 34. Figure 43 Like the coil body 32 of the electric motor according to the fifteenth embodiment shown in the figure, both the plurality of soft magnetic portions 150 and the plurality of conductor portions 16B are formed on the belt member 34 of all the layers.

[0118] (Sixteenth Embodiment) use Figure 44 In the motor of the sixteenth embodiment, members and parts corresponding to the motor 10 and the like described above are denoted by the same reference numerals as those of the motor 10 and the like, and their description may be omitted.

[0119] exist Figure 44 , a schematic diagram of a cross section obtained by radially cutting the coil body 32 of the motor of the sixteenth embodiment is shown. As shown in the figure, in the coil body 32 of the motor of the present embodiment, the circumferential offset distance between the second straight line portion A2 of one coil portion 16 and the fifth straight line portion A5 of another coil portion 16 is set to an intermediate range between the setting of the coil body 32 of the motor of the first embodiment and the setting of the coil body 32 of the motor of the second embodiment. By configuring in this way, the space factor of the coil body 32 can also be improved.

[0120] (Seventeenth Embodiment) use Figure 45 In the motor of the seventeenth embodiment, members and parts corresponding to the motor 10 and the like described above are denoted by the same reference numerals as those of the motor 10 and the like, and their description may be omitted.

[0121] exist Figure 45 , a schematic diagram of a cross section obtained by radially cutting the coil body 32 of the motor of the seventeenth embodiment is shown. As shown in the figure, in the coil body 32 of the motor of the present embodiment, the circumferential width dimension (W1) of the conductor portion 16B gradually increases from the side of the one-layer belt member 34 toward the side of another layer of belt member 34 arranged radially outward of the one-layer belt member 34. By configuring in this way, the cross-sectional area of the conductor portion 16B can be gradually increased as it moves toward the radial outward, thereby improving the space factor of the coil portion 16.

[0122] As described above, each embodiment of the present disclosure has been described. However, the present disclosure is not limited to the above. In addition to the above, of course, various modifications can be made without departing from the gist thereof. In addition, all or part of the structures of the embodiments described above can be combined with each other.

[0123] For example, it can be appropriately selected according to the use of the motor 10 or the like. In addition, the structure of the motor 10 or the like can also be applied to a generator. In addition, the structure of the motor 10 or the like can also be applied to an outer rotor type brushless motor in which the rotor 12 is disposed on the radially outer side of the stator 14. In addition, the structure of the present disclosure can also be applied to a rotor including the coil body 32.

[0124] <Supplementary Note> (Supplementary Note 1) A coil body (32), comprising: A sheet-like member (34) formed of an insulating material into a sheet shape extending in the circumferential direction and laminated in the radial direction; A plurality of coil portions (16) formed of a conductive material on the sheet-like member, having a plurality of conductor portions (16B) arranged in the circumferential direction, and configured such that the conductor portions formed on one layer of the sheet-like member and the conductor portions formed on another layer of the sheet-like member are alternately arranged in the circumferential direction, and the plurality of conductor portions formed on one layer of the sheet-like member and the plurality of conductor portions formed on another layer of the sheet-like member overlap in the circumferential direction. (Supplementary Note 2) The coil body according to Supplementary Note 1, wherein Based on the structures of the plurality of coil portions formed on one layer of the sheet-like member adjacent in the radial direction and the plurality of coil portions formed on another layer of the sheet-like member, The patterns of the plurality of coil portions formed on one layer of the sheet-like member are the same as the patterns of the plurality of coil portions formed on another layer of the sheet-like member. (Supplementary Note 3) The coil body according to Supplementary Note 1 or Supplementary Note 2, wherein Based on the structures of the plurality of coil portions formed on one layer of the sheet-like member adjacent in the radial direction and the plurality of coil portions formed on another layer of the sheet-like member, The width dimension (W1) in the circumferential direction of the conductor portions formed on one layer of the sheet-like member gradually decreases as it approaches the side of the other layer of the sheet-like member, The width dimension in the circumferential direction of the conductor portions formed on the other layer of the sheet-like member gradually decreases as it approaches the side of the one layer of the sheet-like member. (Supplementary Note 4) The coil body according to any one of Appendices 1 to 3, characterized in that The coil body further includes a plurality of magnetic body portions (150), the plurality of magnetic body portions are made of a soft magnetic material and are respectively formed on the sheet-like member, and are arranged along the circumferential direction. (Appendix 5) The coil body according to any one of Appendices 1 to 4, characterized in that Based on the structure of the plurality of coil portions formed on one layer of the sheet-like member and the plurality of coil portions formed on another layer of the sheet-like member disposed radially outside the one layer of the sheet-like member, As it goes from the side of the one layer of the sheet-like member toward the side of the other layer of the sheet-like member, the width dimension (W1) of the conductor portion in the circumferential direction gradually becomes larger. (Appendix 6) An armature (14), The armature includes the coil body according to any one of Appendices 1 to 5. (Appendix 7) The armature according to Appendix 6, characterized in that The armature further includes an armature core portion (26), the armature core portion is made of a soft magnetic material and is formed in a ring shape, The coil body is arranged along the armature core portion, The conductor portion formed on the sheet-like member of the layer disposed opposite to the armature core portion is engaged with the armature core portion in a concave-convex manner. (Appendix 8) An armature, The armature (14) includes the coil body according to any one of Appendices 1, 3, 4, and 5, The armature further includes an armature core portion (26), the armature core portion is made of a soft magnetic material and is formed in a ring shape, The coil body is arranged along the armature core portion, The conductor portion formed on the sheet-like member of the layer disposed opposite to the armature core portion is engaged with the convex portion formed on the armature core portion in a concave-convex manner, The width dimension of the conductor portion in the circumferential direction that is opposite to the armature core portion and is engaged with it in a concave-convex manner is set to a dimension smaller than the width dimension of the convex portion of the armature core portion in the circumferential direction. (Appendix 9) A rotating electric machine (10) includes: One of a stator (14) and a rotor (12) configured to include the armature according to Appendix 6; and The other of the stator and the rotor having a magnet (18) disposed opposite to the coil body in the radial or axial direction. (Supplementary Note 10) The rotating electrical machine according to Supplementary Note 9, wherein: when the size of the conductor portion in the radial direction in which the coil body faces the magnet is set as the thickness dimension (T1), the thickness dimension of the conductor portion formed on the sheet member of the layer disposed on the magnet side is set to a size smaller than the thickness dimension of the conductor portion formed on the sheet member of the layer disposed on the side opposite to the magnet.

[0125] In addition, although the present disclosure has been described based on the embodiments, it should be understood that the present disclosure is not limited to the above-described embodiments and structures. The present disclosure also includes various modifications and modifications within the equivalent scope. In addition, various combinations and modes, and further combinations and modes including only one element, more than one, or less than one thereof also fall within the scope and the scope of the idea of the present disclosure.

Claims

1. A coil body (32), comprising: A sheet member (34), which is formed of an insulating material into a sheet shape extending in the circumferential direction and laminated in the radial direction; And A plurality of coil portions (16), which are formed of a conductive material on the sheet member respectively, have a plurality of conductor portions (16B) arranged in the circumferential direction, and are configured such that the conductor portions formed on one layer of the sheet member and the conductor portions formed on another layer of the sheet member are alternately arranged in the circumferential direction, and the plurality of conductor portions formed on one layer of the sheet member and the plurality of conductor portions formed on another layer of the sheet member overlap in the circumferential direction.

2. The coil body according to claim 1, wherein Based on the structures of the plurality of coil portions formed on one layer of the sheet member adjacent in the radial direction and the plurality of coil portions formed on another layer of the sheet member, The patterns of the plurality of coil portions formed on one layer of the sheet member are the same as the patterns of the plurality of coil portions formed on another layer of the sheet member.

3. The coil body according to claim 1, wherein Based on the structures of the plurality of coil portions formed on one layer of the sheet member adjacent in the radial direction and the plurality of coil portions formed on another layer of the sheet member, The width dimension (W1) in the circumferential direction of the conductor portion formed on one layer of the sheet member gradually decreases as it faces the side of another layer of the sheet member, The width dimension in the circumferential direction of the conductor portion formed on another layer of the sheet member gradually decreases as it faces the side of one layer of the sheet member.

4. The coil body according to claim 1, wherein The coil body further includes a plurality of magnetic body portions (150), which are formed of a soft magnetic material on the sheet member respectively and arranged in the circumferential direction.

5. The coil body according to claim 1, wherein Based on the structures of the plurality of coil portions formed on one layer of the sheet member and the plurality of coil portions formed on another layer of the sheet member arranged radially outside one layer of the sheet member, As it goes from the side of one layer of the sheet member to the side of another layer of the sheet member, the width dimension (W1) in the circumferential direction of the conductor portion gradually increases.

6. An armature (14), The armature includes the coil body according to any one of claims 1 to 5.

7. The armature according to claim 6, wherein The armature further includes an armature core portion (26), which is formed of a soft magnetic material into a ring shape, The coil body is arranged along the armature core portion, The conductor portions formed on the sheet member of the layer arranged opposite to the armature core portion are concavo-convexly engaged with the armature core portion.

8. An armature, The armature (14) includes the coil body according to any one of claims 1, 3, 4, 5, The armature further includes an armature core portion (26), which is formed of a soft magnetic material into a ring shape, The coil body is arranged along the armature core portion, The conductor portion formed on the sheet-like member of the layer disposed opposite to the armature core is in concavo-convex engagement with the convex portion formed on the armature core. The width dimension in the circumferential direction of the conductor portion that is opposite to and in concavo-convex engagement with the armature core is set to a dimension smaller than the width dimension in the circumferential direction of the convex portion of the armature core.

9. A rotating electric machine (10) comprising: One of a stator (14) and a rotor (12) configured to include the armature according to claim 6; And The other of the stator and the rotor having a magnet (18) disposed opposite to the coil body in the radial direction or the axial direction.

10. The rotating electric machine according to claim 9, wherein When the dimension of the conductor portion in the radial direction where the coil body is opposite to the magnet is set as the thickness dimension (T1), The thickness dimension of the conductor portion formed on the sheet-like member of the layer disposed on the magnet side is set to a dimension smaller than the thickness dimension of the conductor portion formed on the sheet-like member of the layer disposed on the side opposite to the magnet.

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