Coil body, armature and rotating electric machine

Abstract

To improve torque while suppressing an increase of physical scale.SOLUTION: A coil body 32 comprises: a band member 34 that is formed in a band shape for which an axis direction is a short direction, a circumferential direction is a long direction, and a radial direction is a thickness direction, and that is stacked in the radial direction in a state of being wound in multiple turns in the circumferential direction; and coil groups 42U, 42V, and 42W. Each of the coil groups 42U, 42V, and 42W is configured to include a plurality of coil parts 16 that are formed on the band member 34 using a conductive material respectively, and are arranged side by side along the long direction of the band member 34. A shape of each of the plurality of coil parts 16 as viewed from the thickness direction of the band member 34 is formed in a shape having one side in the short direction of the band member 34 being open and the other side in the short direction being closed. Opposite end parts of coil parts 16 which are adjacent in the long direction of the band member 34 are connected to one side in the short direction of the band member 34, such that the plurality of coil parts 16 are connected in a defined connection state.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a coil body, an armature, and a rotating electric machine. [Background technology]

[0002] Patent Document 1 below discloses a coil body constituting part of the armature of a rotating electric machine. The coil body described in this document includes a first conductive cylinder, a second conductive cylinder, and an electrical insulator arranged between the first and second conductive cylinders. The first conductive cylinder of the coil body includes a plurality of first conductive bands extending in the axial direction of the cylinder and arranged adjacent to each other at intervals in the circumferential direction. The second conductive cylinder includes a plurality of second conductive bands extending in the axial direction of the cylinder and arranged adjacent to each other at intervals in the circumferential direction. The first conductive bands and the second conductive bands are electrically insulated from each other by the electrical insulator. This configuration prevents impairment of the electrical performance of the coil body while simplifying the configuration of the coil body and reducing costs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-070140 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the coil body described in Patent Document 1, the terminals of the coil body are connected via a wiring board. This makes it difficult to reduce the size of a rotating electric machine including this coil body. Furthermore, in a configuration in which the terminals of the coil body are connected via a wiring board, the current path tends to be long, making it difficult to reduce electrical resistance. As a result, it is difficult to improve the torque of the rotating electric machine.

[0005] In consideration of the above, an object of the present disclosure is to provide a coil body, an armature, and a rotating electric machine that can improve torque while suppressing an increase in size. [Means for solving the problem]

[0006] The coil body (32) that solves the above problem includes a band member (34) formed using an insulating material and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially in a state where the band member is wound multiple times in the circumferential direction, and a plurality of coil portions (16) formed on the band member using a conductive material and arranged in a state lined up along the longitudinal direction of the band member, and the shape of the plurality of coil portions when viewed from the thickness direction of the band member is formed so that one side in the short side direction of the band member is open and the other side in the short side direction of the band member is closed, The shape in which the other side in the short side direction is closed is formed by electrically connecting the surface on one side and the surface on the other side of the band member, and a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) in which ends of the coil sections adjacent in the longitudinal direction of the band member are connected to one side in the lateral direction of the band member, thereby connecting the multiple coil sections in a predetermined connection state. The armature (14) is configured to include the coil body. The rotating electric machine (10, 118, 120, 122, 124) also includes one of a stator (14) and a rotor (12) configured to include the armature, and the other of the stator and rotor having a magnet arranged radially opposite the coil body.

[0007] By configuring it in this way, it is possible to improve torque while suppressing an increase in the size of the motor. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view showing a cross section of a motor according to a first embodiment taken along an axial direction. [Figure 2] 1 is a cross-sectional view showing a cross section of a motor according to a first embodiment taken along a radial direction. [Figure 3] FIG. 2 is a perspective view schematically showing a coil body. [Figure 4] FIG. [Figure 5] FIG. 1 is a diagram illustrating a star connection. [Figure 6] FIG. [Figure 7] 7 is a diagram showing a coil section having a different configuration from the coil section shown in FIG. 6. FIG. [Figure 8] FIG. 10 is a diagram showing a plurality of coil portions of a U phase. [Figure 9] 10 is a schematic diagram illustrating a plurality of coil portions constituting a first U-phase coil group and a plurality of coil portions constituting a second U-phase coil group offset in the axial direction. FIG. [Figure 10] FIG. 3 is a cross-sectional view showing a part of the coil body. [Figure 11] FIG. 3 is a cross-sectional view showing a part of the coil body. [Figure 12] FIG. 3 is a cross-sectional view showing a part of the coil body. [Figure 13] FIG. 3 is a cross-sectional view showing a cross section of the coil body cut along the radial direction. [Figure 14] 10A and 10B are diagrams illustrating a coil body of a motor according to a second embodiment. [Figure 15] FIG. 10 is a diagram showing a plurality of V-phase coil portions. [Figure 16] 10A and 10B are diagrams illustrating a coil body of a motor according to a third embodiment. [Figure 17] FIG. 10 is a diagram showing a plurality of coil portions of a U phase. [Figure 18] 10A and 10B are diagrams illustrating a coil body of a motor according to a fourth embodiment. [Figure 19] FIG. 10 is a diagram showing a plurality of coil portions of a U phase. [Figure 20] 10 is a schematic diagram illustrating a plurality of coil portions constituting a first U-phase coil group and a plurality of coil portions constituting a second U-phase coil group offset in the axial direction. FIG. [Figure 21] FIG. 11 is a diagram showing a plurality of coil portions of a U-phase of a motor according to a fifth embodiment. [Figure 22]10 is a schematic diagram illustrating a plurality of coil portions constituting a first U-phase coil group and a plurality of coil portions constituting a second U-phase coil group offset in the axial direction. FIG. [Figure 23] FIG. 10 is a diagram illustrating a delta connection. [Figure 24] FIG. 13 is a diagram showing a coil body of a motor according to a sixth embodiment. [Figure 25] FIG. 10 is a diagram showing a plurality of coil portions of a motor according to a sixth embodiment. [Figure 26] 13 is a schematic diagram showing the relationship between a coil portion that constitutes a part of a motor according to a seventh embodiment and a magnet of a rotor. FIG. [Figure 27] FIG. 13 is a diagram showing a coil portion that constitutes a part of a motor according to an eighth embodiment. [Figure 28] 13 is a schematic diagram showing a cross section of a part of a coil body of a motor according to a ninth embodiment, cut along a radial direction. FIG. [Figure 29] FIG. 2 is a schematic diagram showing a cross section of a vertical section laminate taken along a radial direction. [Figure 30] FIG. 23 is a schematic diagram showing a cross section of a part of a coil body of a motor according to a tenth embodiment, cut along a radial direction. [Figure 31] FIG. 23 is a schematic diagram showing a cross section of a part of a coil body of a motor according to an eleventh embodiment, cut along the radial direction. [Figure 32] FIG. 10 is a diagram showing a coil portion formed on the fourth turn of the band member. [Figure 33] FIG. 23 is an enlarged view of a portion of the coil body of the motor according to the twelfth embodiment, showing the state before the coil-to-coil connection portions are connected. [Figure 34] FIG. 23 is an enlarged view of a portion of the coil body of the motor according to the twelfth embodiment, showing a state in which the coil-to-coil connection portions are connected. [Figure 35] FIG. 23 is a view showing a band member of a coil body of a motor according to a thirteenth embodiment. [Figure 36] FIG. 23 is a diagram showing a coil body of a motor according to a thirteenth embodiment. [Figure 37] FIG. 23 is a diagram showing a coil body of a motor according to a fourteenth embodiment. [Figure 38]FIG. 23 is a view showing a cross section of a coil body of a motor according to a fourteenth embodiment taken along a radial direction. [Figure 39] FIG. 10 is a view showing a cross section of another example of a coil body cut along the radial direction. [Figure 40] FIG. 10 is a view showing a cross section of another example of a coil body cut along the radial direction. [Figure 41] FIG. 23 is an enlarged view of a part of the coil body of the motor according to the fifteenth embodiment, showing the state before each input point is connected. [Figure 42] FIG. 23 is an enlarged view of a part of the coil body of the motor according to the fifteenth embodiment, showing the state in which each input point is connected. [Figure 43] FIG. 23 is a view showing a cross section of a coil body of a motor according to a sixteenth embodiment taken along a radial direction. [Figure 44] FIG. 23 is a view showing a cross section of a coil body of a motor according to a seventeenth embodiment taken along a radial direction. [Figure 45] FIG. 2 is an enlarged cross-sectional view of a portion of the insulator. [Figure 46] FIG. 10 is a cross-sectional view showing another type of motor. [Figure 47] FIG. 10 is a cross-sectional view showing another type of motor. [Figure 48] FIG. 10 is a cross-sectional view showing another type of motor. [Figure 49] FIG. 10 is a cross-sectional view showing another type of motor. [Figure 50] 10A and 10B are diagrams showing coil portions of other configurations. [Figure 51] 10A and 10B are diagrams showing coil portions of other configurations. [Figure 52] 10A and 10B are diagrams showing coil portions of other configurations. [Figure 53] FIG. 23 is a view of a coil body of a motor according to an eighteenth embodiment as viewed from the axial direction. [Figure 54] FIG. 23 is a diagram showing a coil body of a motor according to an eighteenth embodiment. [Figure 55] FIG. 23 is an enlarged view of a coil body of a motor according to an eighteenth embodiment, as viewed from the axial direction. [Figure 56] FIG. 23 is a diagram showing a coil body of a motor according to a nineteenth embodiment. [Figure 57] FIG. 10 is a diagram showing a plurality of U-phase coils in the first layer. [Figure 58] FIG. 10 is a diagram showing a plurality of U-phase coils in the second layer. [Figure 59] FIG. 29 is a view of the coil body of the motor of the twentieth embodiment as viewed from the axial direction. [Figure 60] FIG. 29 is a diagram showing a coil body of a motor according to a twentieth embodiment. [Figure 61] FIG. 21 is a diagram showing a coil body of a motor according to a twenty-first embodiment. [Figure 62] FIG. 4 is a diagram schematically showing the connection relationship of coil portions formed in the first to fourth layers. [Figure 63] 22A and 22B are views showing first and second coil pieces of a motor according to a 22nd embodiment. [Figure 64] FIG. 22 is a diagram showing the first coil piece portion and the second coil piece portion of the motor of the twenty-second embodiment, showing the state in which the second end portion and the third end portion are connected. [Figure 65] 10 is a diagram showing some of the first coil pieces and second coil pieces among a plurality of first coil pieces and a plurality of second coil pieces that constitute a U phase. FIG. [Figure 66] 10 is a diagram showing a U-phase coil group formed on a band member. FIG. [Figure 67] FIG. 23 is a diagram showing the first coil piece portion and the second coil piece portion of the motor of the twenty-third embodiment, showing the state in which the second end portion and the third end portion are connected. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) A motor 10 according to a first embodiment of the present disclosure will be described using Figures 1 to 13. Note that the arrow Z direction, arrow R direction, and arrow C direction shown as appropriate in the figures respectively indicate one side in the rotational axis direction, the outer side in the rotational radial direction, and one side in the rotational circumferential direction of a rotor 12, which will be described later. Furthermore, hereinafter, when simply referring to an axial direction, a radial direction, or a circumferential direction, this refers to the rotational axis direction, rotational radial direction, or rotational circumferential direction of the rotor 12, unless otherwise specified. Furthermore, the motor 10 of this embodiment and the motors of each embodiment described later are examples of rotating electric machines.

[0010] 1 and 2, the motor 10 of this embodiment is an inner rotor type brushless motor in which a rotor 12 as a rotor is disposed radially inside a stator 14 as an armature and a stator. Note that the drawings shown in Figures 1 and 2 are drawings of the motor 10 etc. shown as an example, and there are some parts that do not match the numbers of coil portions 16, the numbers of magnets 18, and the shapes of the details that will be described later.

[0011] The rotor 12 is composed of a rotating shaft 22 rotatably supported via a pair of bearings 20, a rotor core 24 formed in a bolt-like cylindrical shape and fixed to the rotating shaft 22, and a plurality of magnets 18 fixed to the radially outer surface of the rotor core 24.

[0012] The rotor core 24 includes a first cylindrical portion 24A to which the rotating shaft 22 is fixed by press-fitting or the like, and a second cylindrical portion 24B disposed radially outward of the first cylindrical portion 24A and also formed cylindrically. The outer peripheral surface, which is the radially outer surface of the second cylindrical portion 24B, is formed cylindrically along the circumferential direction. A magnet 18, which will be described later, is fixed to the outer peripheral surface of the second cylindrical portion 24B.

[0013] The magnets 18 are formed using a magnetic compound having an intrinsic coercivity 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 of this embodiment are made of NdFe 11 TiN, Nd2Fe 14 B, SmFe17 The rotor core 24 is formed using a magnetic compound such as N3 or FeNi. A plurality of magnets 18 are fixed to the outer peripheral surface of the second cylindrical portion 24B of the rotor core 24. The magnets 18 whose radially outer surfaces are N poles and the magnets 18 whose radially outer surfaces are S poles are arranged alternately in the circumferential direction. The number of magnets 18 may be set appropriately taking into consideration the output required of the motor 10, etc.

[0014] Stator 14 includes stator core 26, which serves as an armature core formed in an annular shape, and coil body 32 attached to stator core 26. As shown in Figs. 1 to 3, stator 14 of this embodiment has a teethless structure in which a portion of stator core 26 is not disposed inside coil portion 16, which constitutes a portion of coil body 32.

[0015] 1 and 2, the stator core 26 is formed in an annular shape using a soft magnetic material such as steel. The stator core 26 is disposed coaxially with the rotor 12, and the axial center position of the stator core 26 and the axial center position of the multiple magnets 18 fixed to the rotor core 24 coincide with each other in the axial direction.

[0016] As shown in Figures 3 and 4, the coil body 32 of this embodiment is composed of a band member 34 formed in a band shape using an insulating material, and a plurality of coil portions 16 formed on the band member 34.

[0017] The band member 34 is formed in a band shape with the axial direction as the short side direction and the circumferential direction perpendicular to the axial direction as the long side direction. The radial direction is the thickness direction of the band member 34. The thickness of the band member 34 is set to a thickness that allows the band member 34 to be curved in the circumferential direction. In this embodiment, the band member 34 is wound multiple times in the circumferential direction, and the band member 34 has a cylindrical shape. In this embodiment, most of the band member 34 has four layers in the radial direction. This point will be described in detail later.

[0018] As shown in Fig. 3, the multiple coil portions 16 are formed on a band member 34. Then, as shown in Fig. 3 and Fig. 4, the band member 34 is wound multiple times in the circumferential direction, so that the multiple coil portions 16 are arranged at predetermined positions in the circumferential and radial directions.

[0019] Here, in this embodiment, as shown in FIG. 5, a plurality of coil sections 16 constituting the U phase (U-phase coil group 42U), a plurality of coil sections 16 constituting the V phase (V-phase coil group 42V), and a plurality of coil sections 16 constituting the W phase (W-phase coil group 42W) are connected in a star connection.

[0020] 6 shows a single coil portion 16 that constitutes part of the U-phase coil group 42U. As shown in this figure, the coil portion 16, when viewed from the thickness direction of the band member 34, is formed into a substantially V- (U-) shape in which one short-side side (one axial side) of the band member 34 is open and the other short-side side (other axial side) is closed.

[0021] More specifically, the coil portion 16 includes a first linear portion A1 that slopes toward one circumferential side and a second linear portion A2 that extends from one circumferential end of the first linear portion A1 toward the other axial side. The coil portion 16 also includes a third linear portion A3 that slopes toward the other axial side from an end of the second linear portion A2 opposite the first linear portion A1 toward the one circumferential side, and a fourth linear portion A4 that slopes toward one axial side from an end of the third linear portion A3 opposite the second linear portion A2 toward the one circumferential side. The coil portion 16 also includes a fifth linear portion A5 that extends toward one axial side from an end of the fourth linear portion A4 opposite the third linear portion A3, and a sixth linear portion A6 that slopes toward one axial side from an end of the fifth linear portion A5 opposite the fourth linear portion A4 toward the one circumferential side.

[0022] 4 and 6, the first linear portion A1, the second linear portion A2, and the third linear portion A3 are formed on one surface 34A (the radially inner surface) of the band member 34. The fourth linear portion A4, the fifth linear portion A5, and the sixth linear portion A6 are formed on the other surface 34B (the radially outer surface) of the band member 34. The third linear portion A3 and the fourth linear portion A4 are electrically connected via vias, through-holes, or the like (not shown) that penetrate the band member 34. The portion of the coil portion 16 formed on one surface 34A of the band member 34 is indicated by a solid line. The portion of the coil portion 16 formed on the other surface 34B of the band member 34 is indicated by a dashed line.

[0023] The second straight portion A2 and fifth straight portion A5 described above may be referred to as a vertical portion 36. The first straight portion A1 and sixth straight portion A6 may be referred to as a coil end portion 38A, which is one of the coil end portions, and the third straight portion A3 and fourth straight portion A4 may be referred to as a connection portion 38B, which is the other of the coil end portions. In this embodiment, the circumferential distance between the first straight portion A1 and the sixth straight portion A6 gradually increases toward one axial side.

[0024] In this embodiment, the first linear portion A1, the second linear portion A2, the third linear portion A3, the fourth linear portion A4, the fifth linear portion A5, and the sixth linear portion A6 of the coil portion 16 are divided into two in the circumferential direction. More specifically, the first linear portion A1, the second linear portion A2, the third linear portion A3, the fourth linear portion A4, the fifth linear portion A5, and the sixth linear portion A6 of the coil portion 16 are divided into two in a direction perpendicular to the direction in which they extend. In the following description, the portion of the first linear portion A1 located toward the center of the circumferential direction of the coil portion 16 will be referred to as the "first linear portion A1 (inner)," and the portion of the first linear portion A1 located on the opposite side of the center of the circumferential direction of the coil portion 16 will be referred to as the "first linear portion A1 (outer)." Similarly, the second straight line portion A2, the third straight line portion A3, the fourth straight line portion A4, the fifth straight line portion A5, and the sixth straight line portion A6 will be described with the notation (inside) or (outside) added to the end of their reference numerals. In addition, in each drawing, the notation (inside) or (outside) is omitted in some places in consideration of the readability of the drawings.

[0025] As shown in FIG. 6, the first linear portion A1 (inner) and the first linear portion A1 (outer) are spaced apart via a slit 60 formed therebetween and extend parallel to each other.

[0026] The second straight line portion A2 (inner) and the second straight line portion A2 (outer) are spaced apart via a slit 60 formed therebetween and extend parallel to each other. Furthermore, the second straight line portion A2 (inner) and the second straight line portion A2 (outer) are connected to the first straight line portion A1 (inner) and the first straight line portion A1 (outer), respectively.

[0027] The third straight line portion A3 (inner) and the third straight line portion A3 (outer) are spaced apart from each other by a slit 60 formed therebetween and extend parallel to each other. Furthermore, the third straight line portion A3 (inner) and the third straight line portion A3 (outer) are connected to the second straight line portion A2 (inner) and the second straight line portion A2 (outer), respectively.

[0028] The fourth straight line portion A4 (inner) and the fourth straight line portion A4 (outer) are spaced apart from each other via a slit 60 formed therebetween and extend parallel to each other. Furthermore, the fourth straight line portion A4 (inner) and the fourth straight line portion A4 (outer) are connected to the third straight line portion A3 (inner) and the third straight line portion A3 (outer), respectively.

[0029] The fifth straight portion A5 (inner) and the fifth straight portion A5 (outer) are spaced apart from each other by a slit 60 formed therebetween and extend parallel to each other. Furthermore, the fifth straight portion A5 (inner) and the fifth straight portion A5 (outer) are connected to the fourth straight portion A4 (inner) and the fourth straight portion A4 (outer), respectively.

[0030] The sixth straight portion A6 (inner) and the sixth straight portion A6 (outer) are spaced apart from each other via a slit 60 formed therebetween and extend parallel to each other. Furthermore, 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.

[0031] An end of the first straight line portion A1 (inner) opposite to the second straight line portion A2 (inner) and an end of the first straight line portion A1 (outer) opposite to the second straight line portion A2 (outer) are connected via a first wire connection portion 62. The first wire connection portion 62 forms part of the first straight line portion A1. An end of the sixth straight line portion A6 (inner) opposite to the fifth straight line portion A5 (inner) and an end of the sixth straight line portion A6 (outer) opposite to the fifth straight line portion A5 (outer) are connected via a second wire connection portion 64. The second wire connection portion 64 forms part of the sixth straight line portion A6. As a result, a closed circuit 66 is formed in which the path formed by the first straight section A1 (outer), the second straight section A2 (outer), the third straight section A3 (outer), the fourth straight section A4 (outer), the fifth straight section A5 (outer) and the sixth straight section A6 (outer) and the path formed by the first straight section A1 (inner), the second straight section A2 (inner), the third straight section A3 (inner), the fourth straight section A4 (inner), the fifth straight section A5 (inner) and the sixth straight section A6 (inner) are connected by the first connection section 62 and the second connection section 64.

[0032] In the above-described example, each portion of the coil portion 16 is divided into two in the circumferential direction by the slits 60, but the present disclosure is not limited to this. For example, as shown in FIG. 7 , each portion of the coil portion 16 may not be divided in the circumferential direction. Also, each portion of the coil portion 16 may be divided into three or more in the circumferential direction by the slits 60. Furthermore, a portion of the coil portion 16 may be divided in the circumferential direction by the slits 60.

[0033] 8 and 9, the other coil sections 16 constituting the U phase are configured in the same manner as the coil section 16 shown in Fig. 6. In other words, all of the coil sections 16 constituting the U phase have approximately the same configuration.

[0034] FIG. 8 shows a plurality of U-phase coil portions 16 formed on the band member 34. As shown in this figure, in this embodiment, half of the plurality of coil portions 16 are connected in series. These series-connected coil portions 16 will be referred to as a U-phase first coil group 42U1. The remaining half of the plurality of coil portions 16 are connected in series. These series-connected coil portions 16 will be referred to as a U-phase second coil group 42U2. In this embodiment, the U-phase coil group 42U is composed of the U-phase first coil group 42U1 and the U-phase second coil group 42U2. The U-phase first coil group 42U1 and the U-phase second coil group 42U2 are connected in parallel.

[0035] 9 is a schematic diagram illustrating the plurality of coil portions 16 constituting the first U-phase coil group 42U1 and the plurality of coil portions 16 constituting the second U-phase coil group 42U2, offset in the axial direction. As shown in this diagram, the plurality of coil portions 16 constituting the first U-phase coil group 42U1 are arranged at predetermined intervals along the circumferential direction. The first connection portion 62 of one circumferentially adjacent coil portion 16 and the second connection portion 64 of the other circumferentially adjacent coil portion 16 are connected via vias, through-holes, or the like.

[0036] The multiple coil portions 16 that make up the U-phase second coil group 42U2 are arranged at predetermined intervals along the circumferential direction, similar to the multiple coil portions 16 that make up the U-phase first coil group 42U1. The first connection portion 62 of one circumferentially adjacent coil portion 16 and the second connection portion 64 of the other circumferentially adjacent coil portion 16 are connected via vias, through holes, or the like.

[0037] Here, the plurality of coil portions 16 constituting the U-phase second coil group 42U2 are offset to one side in the circumferential direction relative to the plurality of coil portions 16 constituting the U-phase first coil group 42U1. This offset distance corresponds to the circumferential distance between the second straight portion A2 and the fifth straight portion A5 of the coil portions 16. As a result, the fifth straight portion A5 of the coil portions 16 constituting the U-phase first coil group 42U1 and the second straight portion A2 of the coil portions 16 constituting the U-phase second coil group 42U2 are arranged to overlap in the radial direction with the band member 34 interposed therebetween. Furthermore, the second straight portion A2 of the coil portions 16 constituting the U-phase first coil group 42U1 and the fifth straight portion A5 of the coil portions 16 constituting the U-phase second coil group 42U2 are arranged to overlap in the radial direction with the band member 34 interposed therebetween.

[0038] Of the multiple coil sections 16 constituting the first U-phase coil group 42U1, the first connection section 62 of the coil section 16 located furthest to the other circumferential side serves as an input point 43 connected to a power source. Also, of the multiple coil sections 16 constituting the first U-phase coil group 42U1, the second connection section 64 of the coil section 16 located furthest to one circumferential side serves as a neutral point 44.

[0039] Furthermore, the first connection 62 of the coil portion 16 arranged furthest to the other circumferential side among the plurality of coil portions 16 constituting the second U-phase coil group 42U2 serves as the neutral point 44. Furthermore, the second connection 64 of the coil portion 16 arranged furthest to the one circumferential side among the plurality of coil portions 16 constituting the second U-phase coil group 42U2 serves as the input point 43 connected to the power source.

[0040] Although detailed description using reference numerals in the drawings will be omitted, as shown in FIG. 4, the V-phase coil group 42V has the same configuration as the U-phase coil group 42U, except for the following points: The V-phase coil group 42V is composed of a first V-phase coil group and a second V-phase coil group. The first V-phase coil group and the second V-phase coil group are connected in parallel. The first connection 62 of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the first V-phase coil group is the neutral point 44. The second connection 64 of the coil portion 16 located furthest to the one circumferential side among the multiple coil portions 16 constituting the first V-phase coil group is the input point 43 connected to the power source. The first connection 62 of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the second V-phase coil group is the input point 43 connected to the power source. Furthermore, the second connection portion 64 of the coil portion 16 arranged furthest to one circumferential side among the plurality of coil portions 16 constituting the second V-phase coil group serves as the neutral point 44 .

[0041] The W-phase coil group 42W has the same configuration as the U-phase coil group 42U. The W-phase coil group 42W is composed of a W-phase first coil group and a W-phase second coil group. The W-phase first coil group and the W-phase second coil group are connected in parallel. The first connection 62 of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the W-phase first coil group is an input point 43 connected to a power source. The second connection 64 of the coil portion 16 located furthest to the one circumferential side among the multiple coil portions 16 constituting the W-phase first coil group is a neutral point 44. The first connection 62 of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the W-phase second coil group is a neutral point 44. The second connection 64 of the coil portion 16 located furthest to the one circumferential side among the multiple coil portions 16 constituting the W-phase second coil group is an input point 43 connected to a power source.

[0042] 4, the plurality of coil portions 16 constituting the V-phase coil group 42V are arranged offset to one side in the circumferential direction relative to the plurality of coil portions 16 constituting the U-phase coil group 42U. Furthermore, the plurality of coil portions 16 constituting the W-phase coil group 42W are arranged offset to one side in the circumferential direction relative to the plurality of coil portions 16 constituting the V-phase coil group 42V. As a result, the U-phase coil portions 16, the V-phase coil portions 16, and the W-phase coil portions 16 are arranged in this order along the circumferential direction. In the following description, the U-phase coil portions 16 may be simply referred to as coil portions 16U, the V-phase coil portions 16 may be simply referred to as coil portions 16V, and the W-phase coil portions 16 may be simply referred to as coil portions 16W.

[0043] An input wire 70 extends toward one axial side from input points 43 of the coil sections 16U, 16V, 16W located at the other circumferential end of the band member 34. In addition, an input wire 70 extends toward one axial side from input points 43 of the coil sections 16U, 16V, 16W located at the other circumferential end of the band member 34.

[0044] The neutral points 44 of the coil sections 16U, 16V, 16W arranged at the other circumferential end of the band member 34 are connected to one another via a neutral point connection pattern portion 72 formed on the band member 34. In addition, the neutral points 44 of the coil sections 16U, 16V, 16W arranged at one circumferential end of the band member 34 are connected to one another via a neutral point connection pattern portion 72 formed on the band member 34.

[0045] 10 shows a portion of a cross section of the band member 34 and the second straight portion A2 and the fifth straight portion A5 of the plurality of coil portions 16 taken along line AA shown in FIG. 4. The cross section shown in FIG. 10 is a cross section of the end portion on the other circumferential side of the band member 34. As shown in FIG. 10, in this portion, 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 one surface 34A of the band member 34.

[0046] 11 shows a portion of a cross section of the band member 34 and the second straight portion A2 and the fifth straight portion A5 of the plurality of coil portions 16 taken along line AA shown in FIG. 4. The cross section shown in FIG. 11 corresponds to the range indicated by arrow E in FIG. 4. In the cross section shown in FIG. 11, the second straight portion A2 (outer) of coil portion 16U, the second straight portion A2 (inner) of coil portion 16U, the second straight portion A2 (outer) of coil portion 16V, the second straight portion A2 (inner) of coil portion 16V, the second straight portion A2 (outer) of coil portion 16W, the second straight portion A2 (inner) of coil portion 16W, the second straight portion A2 (outer) of coil portion 16U, and the second straight portion A2 (inner) of coil portion 16U are formed in this order on one surface 34A of the band member 34. In addition, in the cross section shown in Figure 11, the fifth straight portion A5 (inner) of coil portion 16U, the fifth straight portion A5 (outer) of coil portion 16U, the fifth straight portion A5 (inner) of coil portion 16V, the fifth straight portion A5 (outer) of coil portion 16V, the fifth straight portion A5 (inner) of coil portion 16W, the fifth straight portion A5 (outer) of coil portion 16W, the fifth straight portion A5 (inner) of coil portion 16U, and the fifth straight portion A5 (outer) of coil portion 16U are formed in this order on the other surface 34B of the band member 34.

[0047] 12 shows a portion of a cross section of the band member 34 and the second straight portion A2 and the fifth straight portion A5 of the plurality of coil portions 16 taken along line AA shown in FIG. 4. The cross section shown in FIG. 12 is a cross section of an end portion on one circumferential side of the band member 34. In the cross section shown in FIG. 12, 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 other surface 34B of the band member 34.

[0048] As described above, the band member 34 is wound multiple times in the circumferential direction, thereby disposing the multiple coil portions 16 at predetermined positions in the circumferential and radial directions. Fig. 13 shows a portion of a cross section taken along the radial direction of the coil body 32 around which the band member 34 is wound. Note that this cross section is a cross section of a portion corresponding to the vertical portion 36 (see Fig. 6) of each coil portion 16.

[0049] In the cross section shown in FIG. 13, the vertical portions 36 of the multiple coil portions 16 are stacked radially and arranged at equal intervals in the circumferential direction. When the vertical portions 36 of the multiple coil portions 16 are stacked radially, a first insulating layer 54A or a second insulating layer 54B is interposed between a pair of vertical portions 36 adjacent to each other in the radial direction. The first insulating layer 54A is a band member 34, and is, for example, a polyimide film or insulating paper. As shown in FIGS. 10 to 13, the second insulating layer 54B is an insulating film formed on the band member 34 and covering the coil portions 16, and is, for example, an insulating paint. Examples of the insulating paint that can be used include a polyimide coating film and varnish.

[0050] 13, an assembly formed by radially stacking the vertical portions 36 of the multiple coil portions 16 will be referred to as a vertical portion laminate 56. That is, an assembly formed by radially stacking the second straight portion A2 (outer) of the coil portion 16U and the fifth straight portion A2 (inner) of the coil portion 16U, an assembly formed by radially stacking the second straight portion A2 (outer) of the coil portion 16V and the fifth straight portion A2 (inner) of the coil portion 16V, and an assembly formed by radially stacking the second straight portion A2 (outer) of the coil portion 16W and the fifth straight portion A2 (inner) of the coil portion 16W will be referred to as a vertical portion laminate 56, respectively.

[0051] 13, the vertical section laminate 56 whose radially inner end is the second straight section A2 (outside) of the coil section 16U and the vertical section laminate 56 whose radially inner end is the second straight section A2 (inside) of the coil section 16U constitute a U-phase conductor group 46U arranged in this order in the circumferential direction. The vertical section laminate 56 whose radially inner end is the second straight section A2 (outside) of the coil section 16V and the vertical section laminate 56 whose radially inner end is the second straight section A2 (inside) of the coil section 16V constitute a V-phase conductor group 46V arranged in this order in the circumferential direction. The vertical section laminate 56 whose radially inner end is the second straight section A2 (outside) of the coil section 16W and the vertical section laminate 56 whose radially inner end is the second straight section A2 (inside) of the coil section 16W constitute a W-phase conductor group 46W arranged in this order in the circumferential direction.

[0052] (Actions and Effects of This Embodiment) Next, the operation and effects of this embodiment will be described.

[0053] 1, 2, 4, and 5, in the motor 10 of this embodiment, a rotating magnetic field is generated in the stator 14 by switching the energization of the U-phase coil group 42U, the V-phase coil group 42V, and the W-phase coil group 42W, which constitute a part of the stator 14. This causes the rotor 12 to rotate.

[0054] In this embodiment, the coil body 32 includes a band member 34 formed in a band shape using an insulating material, and a plurality of coil portions 16 formed on the band member 34. The band member 34 is wound multiple times in the circumferential direction, thereby disposing the plurality of coil portions 16 at predetermined positions in the circumferential and radial directions. This configuration can prevent the coil body 32 from becoming too large in the radial direction. As a result, the motor 10 can be prevented from becoming too large.

[0055] In this embodiment, as shown in FIGS. 4, 8, and 9, the shape of the multiple coil portions 16 is formed into a substantially V-shape when viewed from the thickness direction of the band member 34. In addition, the first connection portion 62 of one circumferentially adjacent coil portion 16 and the second connection portion 64 of the other circumferentially adjacent coil portion 16 are connected on one axial side of the band member 34. This configuration eliminates the need to provide a separate wiring path on the band member 34 to connect the coil portions 16, thereby preventing the coil body 32 from becoming larger in size in the axial direction. This prevents the motor 10 from becoming larger in size. Furthermore, because it is not necessary to provide a separate wiring path on the band member 34 to connect the coil portions 16, the wiring path between the coil portions 16 can be prevented from becoming longer. As a result, electrical resistance between the coil portions 16 is reduced, and the torque of the motor 10 can be improved.

[0056] 6 and 13, in this embodiment, each portion of the coil section 16 is divided into two in the circumferential direction by a slit 60. This reduces the area over which the vertical section laminations 56 face the magnets 18 of the rotor 12. As a result, eddy currents generated in the vertical section laminations 56 by radial magnetic flux can be suppressed, further improving the torque of the motor 10.

[0057] 6 and 9, in this embodiment, the circumferential distance between the first straight portion A1 and the sixth straight portion A6 of the coil portion 16 gradually increases toward one axial side, making it easier to connect the circumferentially adjacent coil portions 16 to each other on both circumferential sides of the second straight portion A2 and the fifth straight portion A5.

[0058] In this embodiment, the coil sections 16 of the coil groups 42U, 42V, and 42W of the same phase are stacked radially to form the vertical section laminate 56. As a result, adjusting the number of stacked coil sections 16 can achieve the same effect as adjusting the number of turns. The number of turns refers to the number of turns of a winding in a coil formed by winding a conductive winding.

[0059] (Second embodiment) Next, a motor according to a second embodiment will be described. In the motor according to the second embodiment, the members and parts corresponding to those of the motor 10 according to the first embodiment will be denoted by the same reference numerals as those of the motor 10 according to the first embodiment, and their description may be omitted.

[0060] Fig. 14 shows a coil body 32 that constitutes a part of the motor of the second embodiment. Note that in this drawing, the band member 34 is omitted. As shown in Fig. 14, the motor of this embodiment is configured similarly to the motor 10 of the first embodiment described above, except that the configuration of the V-phase coil group 42V is different.

[0061] 15 , the first connection 62 of the coil portion 16 located furthest from the other circumferential side among the plurality of coil portions 16 constituting the V-phase first coil group 42V1 serves as an inter-coil connection 74. The second connection 64 of the coil portion 16 located furthest from the other circumferential side among the plurality of coil portions 16 constituting the V-phase first coil group 42V1 serves as an input point 43 connected to a power source. The first connection 62 of the second coil portion 16 counting from the other circumferential side among the plurality of coil portions 16 constituting the V-phase first coil group 42V1 serves as a neutral point 44. The first connection 62 of the coil portion 16 located furthest from the other circumferential side among the plurality of coil portions 16 constituting the V-phase second coil group 42V2 serves as an input point 43 connected to a power source.

[0062] Furthermore, the second connection 64 of the coil portion 16 that is arranged furthest to one side in the circumferential direction among the plurality of coil portions 16 that constitute the V-phase first coil group 42V1 serves as an inter-coil connection 74. This inter-coil connection 74 is connected to the first connection 62 (inter-coil connection 74) of the coil portion 16 that is arranged furthest to the other side in the circumferential direction among the plurality of coil portions 16 that constitute the V-phase first coil group 42V1. Furthermore, the second connection 64 of the coil portion 16 that is arranged furthest to one side in the circumferential direction among the plurality of coil portions 16 that constitute the V-phase second coil group 42V2 serves as the neutral point 44.

[0063] 14 and 15 , in this embodiment, compared to the coil body 32 of the motor 10 of the first embodiment (see FIG. 4 ), the input points 43 and input wires 70 of the V-phase coil portions 16 can be concentrated and arranged at the other circumferential end of the band member 34. That is, it is possible to avoid arranging the input points 43 and input wires 70 of the V-phase coil portions 16 at one circumferential end of the band member 34. As a result, in this embodiment, it is possible to avoid the input wires 70 extending from the input points 43 of the V-phase coil portions 16 intersecting with the input wires 70 extending from the input points 43 of the U-phase coil portions 16 and the input wires 70 extending from the input points 43 of the W-phase coil portions 16, as in the coil body 32 of the motor 10 of the first embodiment (see FIG. 4 ).

[0064] (Third embodiment) Next, a motor according to a third embodiment will be described. In the motor according to the third embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0065] Fig. 16 shows a coil body 32 that constitutes a part of a motor of the third embodiment. Note that the belt member 34 is not shown in this figure. As shown in Fig. 16, the motor of this embodiment is configured similarly to the motor 10 of the first embodiment described above, except that the input point 43 and the neutral point 44 are arranged so as to be concentrated in the middle part in the circumferential direction of the belt member 34 (see Fig. 4).

[0066] 17, the first connection 62 of the coil portion 16 that is located furthest in the other circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1 serves as an inter-coil connection 74. Furthermore, the second connection 64 of the coil portion 16 that is located furthest in the one circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1 serves as an inter-coil connection 74. This inter-coil connection 74 is configured to be connected to the first connection 62 (inter-coil connection 74) of the coil portion 16 that is located furthest in the other circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1.

[0067] Of the multiple coil portions 16 constituting the U-phase second coil group 42U2, the first connection portion 62 of the coil portion 16 arranged furthest to the other circumferential side serves as an inter-coil connection portion 74. Furthermore, of the multiple coil portions 16 constituting the U-phase second coil group 42U2, the second connection portion 64 of the coil portion 16 arranged furthest to one circumferential side serves as an inter-coil connection portion 74. This inter-coil connection portion 74 is configured to be connected to the first connection portion 62 (inter-coil connection portion 74) of the coil portion 16 arranged furthest to the other circumferential side of the multiple coil portions 16 constituting the U-phase second coil group 42U2.

[0068] Of the multiple coil portions 16 that make up the first coil group 42U1 of the U phase, the second connection portion 64 of the fourth coil portion 16 counting from the other circumferential side serves as the neutral point 44.

[0069] Of the plurality of coil portions 16 that constitute the second U-phase coil group 42U2, the first connection portion 62 of the fifth coil portion 16 counting from the other circumferential side serves as the neutral point 44.

[0070] Of the plurality of coil portions 16 that constitute the first coil group 42U1 of the U phase, the first connection portion 62 of the fifth coil portion 16 counting from the other circumferential side serves as the input point 43.

[0071] The second connection portion 64 of the fourth coil portion 16 counting from the other circumferential side among the plurality of coil portions 16 that constitute the second U-phase coil group 42U2 serves as the input point 43.

[0072] 16, the V-phase coil group 42V has the same configuration as the U-phase coil group 42U, except that the neutral point 44 and the input point 43 are interchanged. The W-phase coil group 42W has the same configuration as the U-phase coil group 42U.

[0073] 16 and 17 , in this embodiment, the input points 43 and the neutral points 44 of the coil sections 16 of each phase can be concentrated and arranged in the middle of the circumferential direction of the band member 34 (see FIG. 4 ). In addition, in this embodiment, the inter-coil connection portions 74 are arranged at one circumferential end and the other circumferential end of the band member 34, respectively. This allows the inter-coil connection portions 74 formed at the one circumferential end of the band member 34 to be connected to the inter-coil connection portions 74 formed at the other circumferential end of the band member 34, with the one circumferential end and the other circumferential end of the band member 34 overlapping in the radial direction.

[0074] (Fourth embodiment) Next, a motor according to a fourth embodiment will be described. In the motor according to the fourth embodiment, the components and parts corresponding to those of the motor 10 according to the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 according to the first embodiment, and the description thereof will be omitted.

[0075] Figure 18 shows a coil body 32 that constitutes a part of a motor of the fourth embodiment. Note that in this figure, the band member 34 is not shown. As shown in Figure 18, the motor of this embodiment is configured similarly to the motor 10 of the first embodiment described above, except that multiple coil portions 16 of the same phase are connected in series.

[0076] As shown in FIGS. 19 and 20 , the second connection 64 of the coil portion 16 that is located furthest in the circumferential direction among the plurality of coil portions 16 that make up the U-phase first coil group 42U1 is an inter-coil connection 74. Similarly, the second connection 64 of the coil portion 16 that is located furthest in the circumferential direction among the plurality of coil portions 16 that make up the U-phase second coil group 42U2 is an inter-coil connection 74. This inter-coil connection 74 is connected to the second connection 64 (inter-coil connection 74) of the coil portion 16 that is located furthest in the circumferential direction among the plurality of coil portions 16 that make up the U-phase first coil group 42U1. This connects the plurality of coil portions 16 that make up the U-phase first coil group 42U1 and the plurality of coil portions 16 that make up the U-phase second coil group 42U2 in series. That is, all of the coil portions 16 in the U-phase coil group 42U are connected in series.

[0077] 18, the V-phase coil group 42V has the same configuration as the U-phase coil group 42U, except that the neutral point 44 and the input point 43 are interchanged. The W-phase coil group 42W has the same configuration as the U-phase coil group 42U.

[0078] In the embodiment described above, it is possible to obtain a coil body 32 in which a plurality of coil portions 16 of the same phase are connected in series.

[0079] (Fifth embodiment) Next, a motor according to a fifth embodiment will be described. In the motor according to the fifth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0080] Fig. 21 shows a plurality of U-phase coil sections 16 that constitute a part of the motor of the fifth embodiment. Fig. 22 shows a schematic diagram in which the plurality of coil sections 16 that constitute the first U-phase coil group 42U1 and the plurality of coil sections 16 that constitute the second U-phase coil group 42U2 are offset in the axial direction.

[0081] As shown in Figure 22, the coil portion 16 of this embodiment is configured so that the third straight portion A3 (outside) and the fourth straight portion A4 (inside) are connected, and also so that the third straight portion A3 (inside) and the fourth straight portion A4 (outside) are connected.

[0082] In addition, in this embodiment, the sixth straight portion A6 (inner) of one circumferentially adjacent coil portion 16 is connected to the first straight portion A1 (outer) of the other coil portion 16, and the sixth straight portion A6 (outer) of one circumferentially adjacent coil portion 16 is connected to the first straight portion A1 (inner) of the other coil portion 16.

[0083] In the present embodiment, the end of the first straight line portion A1 (outer) of the coil portion 16 arranged furthest in the other circumferential direction among the plurality of coil portions 16 constituting the U-phase first coil group 42U1, opposite to the second straight line portion A2 (outer), serves as the input point 43. The end of the first straight line portion A1 (inner) of the coil portion 16 arranged furthest in the other circumferential direction among the plurality of coil portions 16 constituting the U-phase first coil group 42U1, opposite to the second straight line portion A2 (inner), serves as an inter-coil connection portion 74.

[0084] Furthermore, an end portion of the sixth straight portion A6 (inner) of the coil portion 16 that is located furthest to one side in the circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1, opposite to the fifth straight portion A5 (inner), serves as an inter-coil connection portion 74. This inter-coil connection portion 74 is configured to be connected to an end portion (inter-coil connection portion 74) of the first straight portion A1 (inner) of the coil portion 16 that is located furthest to the other side in the circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1, opposite to the second straight portion A2 (inner). Furthermore, an end portion of the sixth straight portion A6 (outer) of the coil portion 16 that is located furthest to one side in the circumferential direction among the plurality of coil portions 16 that constitute the U-phase first coil group 42U1, opposite to the fifth straight portion A5 (outer), serves as the neutral point 44.

[0085] Furthermore, the end of the first straight line portion A1 (outer) of the coil portion 16 arranged furthest to the other circumferential side among the plurality of coil portions 16 constituting the U-phase second coil group 42U2, opposite to the second straight line portion A2 (outer), serves as an inter-coil connection portion 74. Furthermore, the end of the first straight line portion A1 (inner) of the coil portion 16 arranged furthest to the other circumferential side among the plurality of coil portions 16 constituting the U-phase second coil group 42U2, opposite to the second straight line portion A2 (inner), serves as a neutral point 44.

[0086] Furthermore, an end of the sixth straight portion A6 (inner) of the coil portion 16 arranged furthest to one circumferential side among the plurality of coil portions 16 constituting the U-phase second coil group 42U2, opposite to the fifth straight portion A5 (inner), serves as the input point 43. Furthermore, an end of the sixth straight portion A6 (outer) of the coil portion 16 arranged furthest to one circumferential side among the plurality of coil portions 16 constituting the U-phase second coil group 42U2, opposite to the fifth straight portion A5 (outer), serves as an inter-coil connection portion 74. This inter-coil connection portion 74 is configured to be connected to an end (inter-coil connection portion 74) of the first straight portion A1 (outer) of the coil portion 16 arranged furthest to the other circumferential side among the plurality of coil portions 16 constituting the U-phase second coil group 42U2, opposite to the second straight portion A2 (outer).

[0087] The V-phase coil group 42V and the W-phase coil group 42W have the same configuration as the U-phase coil group 42U.

[0088] In the present embodiment described above, a current can be passed from a path in the coil portion 16 that has the first straight line portion A1 (outer), the second straight line portion A2 (outer), the third straight line portion A3 (outer), the fourth straight line portion A4 (inner), the fifth straight line portion A5 (inner), and the sixth straight line portion A6 (inner) to a path in the coil portion 16 that has the first straight line portion A1 (inner), the second straight line portion A2 (inner), the third straight line portion A3 (inner), the fourth straight line portion A4 (outer), the fifth straight line portion A5 (outer), and the sixth straight line portion A6 (outer).

[0089] (Sixth embodiment) Next, a motor according to a sixth embodiment will be described. In the motor according to the sixth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof will be omitted.

[0090] As shown in Figures 23 to 25, in the motor of this embodiment, the UV-phase coil group 42UV between the U-phase and V-phase, the VW-phase coil group 42VW between the V-phase and W-phase, and the WU-phase coil group 42WU between the W-phase and U-phase are connected in a delta connection.

[0091] 25, the first connection 62 of the coil portion 16 arranged furthest on the other circumferential side among the multiple coil portions 16 constituting the first UV-phase coil group 42UV1 serves as the input point 43. Also, the first connection 62 of the coil portion 16 arranged furthest on the other circumferential side among the multiple coil portions 16 constituting the second UV-phase coil group 42UV2 ​​serves as the input point 43.

[0092] Of the multiple coil sections 16 constituting the first VW-phase coil group 42VW1, the first connection section 62 of the coil section 16 arranged furthest to the other circumferential side serves as the input point 43. Also, of the multiple coil sections 16 constituting the second VW-phase coil group 42VW2, the first connection section 62 of the coil section 16 arranged furthest to the other circumferential side serves as the input point 43.

[0093] Of the multiple coil sections 16 constituting the first coil group 42WU1 of the WU phase, the first connection section 62 of the coil section 16 arranged furthest to the other circumferential side serves as the input point 43. Also, of the multiple coil sections 16 constituting the second coil group 42WU2 of the WU phase, the first connection section 62 of the coil section 16 arranged furthest to the other circumferential side serves as the input point 43.

[0094] The first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the UV phase first coil group 42UV1 and the first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the VW phase first coil group 42VW1 are connected via an interphase connection wire 76.

[0095] The first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the second coil group 42UV2 ​​of the UV phase and the first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the first coil group 42WU1 of the WU phase are connected via an interphase connection wire 76.

[0096] The first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the second coil group 42VW2 of the VW phase and the first connection portion 62 (input point 43) of the coil portion 16 located furthest to the other circumferential side among the multiple coil portions 16 constituting the second coil group 42WU2 of the WU phase are connected via an interphase connection wire 76.

[0097] Of the multiple coil sections 16 constituting the first UV-phase coil group 42UV1, the second connection section 64 of the coil section 16 arranged furthest to one side in the circumferential direction serves as the input point 43. Also, of the multiple coil sections 16 constituting the second UV-phase coil group 42UV2, the second connection section 64 of the coil section 16 arranged furthest to one side in the circumferential direction serves as the input point 43.

[0098] Of the multiple coil sections 16 that make up the first VW-phase coil group 42VW1, the second connection section 64 of the coil section 16 that is located furthest to one side in the circumferential direction serves as the input point 43. Also, of the multiple coil sections 16 that make up the second VW-phase coil group 42VW2, the second connection section 64 of the coil section 16 that is located furthest to one side in the circumferential direction serves as the input point 43.

[0099] Of the multiple coil sections 16 that make up the WU-phase first coil group 42WU1, the second connection section 64 of the coil section 16 that is located furthest to one side in the circumferential direction serves as the input point 43. Also, of the multiple coil sections 16 that make up the WU-phase second coil group 42WU2, the second connection section 64 of the coil section 16 that is located furthest to one side in the circumferential direction serves as the input point 43.

[0100] The second connection portion 64 (input point 43) of the coil portion 16 located furthest to one side in the circumferential direction among the multiple coil portions 16 constituting the first coil group 42UV1 of the UV phase and the second connection portion 64 (input point 43) of the coil portion 16 located furthest to one side in the circumferential direction among the multiple coil portions 16 constituting the second coil group 42WU2 of the WU phase are connected via an interphase connection wire 76.

[0101] The second connection portion 64 (input point 43) of the coil portion 16 located furthest to one side in the circumferential direction among the multiple coil portions 16 constituting the second coil group 42UV2 ​​of the UV phase and the second connection portion 64 (input point 43) of the coil portion 16 located furthest to one side in the circumferential direction among the multiple coil portions 16 constituting the second coil group 42VW2 of the VW phase are connected via an interphase connection wire 76.

[0102] The second connection portion 64 (input point 43) of the coil portion 16 that is located furthest to one side in the circumferential direction among the multiple coil portions 16 that make up the first coil group 42VW1 of the VW phase and the second connection portion 64 (input point 43) of the coil portion 16 that is located furthest to one side in the circumferential direction among the multiple coil portions 16 that make up the first coil group 42WU1 of the WU phase are connected via an interphase connection wire 76.

[0103] The motor of this embodiment described above can have characteristics different from those of the motor 10 of the first embodiment, which is connected in a star connection.

[0104] (Seventh and Eighth Embodiments) Next, a motor according to a seventh embodiment and a motor according to an eighth embodiment will be described. In the motor according to the seventh embodiment and the motor according to the eighth embodiment, the members and parts corresponding to those of the motor 10 according to the first embodiment already described will be assigned the same reference numerals as those of the motor 10 according to the first embodiment, and the description thereof may be omitted.

[0105] 26 is a schematic diagram showing the relationship between the coil portion 16 constituting a part of the motor of the seventh embodiment and the magnets 18 of the rotor 12. As shown in this figure, the circumferential pitch from the second straight portion A2 (outside) to the fifth straight portion A5 (inside) is defined as P1 (deg), and the circumferential pitch from the end of the N-pole magnet 18 on one side in the rotation direction to the end of the S-pole magnet 18 on one side in the rotation direction is defined as P2 (deg).

[0106] 26, the arrow i1 indicates the induced current generated in the coil section 16 when the N-pole magnet 18 passes over the coil section 16. This induced current i1 flows through the third straight section A3 (inner), the second straight section A2 (inner), the first straight section A1 (inner), the first connection section 62, the first straight section A1 (outer), the second straight section A2 (outer), and the third straight section A3 (outer) in this order.

[0107] 26, the arrow i2 indicates the induced current generated in the coil section 16 when the south pole magnet 18 passes over the coil section 16. This induced current i2 flows through the fourth straight section A4 (inner), the fifth straight section A5 (inner), the sixth straight section A6 (inner), the second connection section 64, the sixth straight section A6 (outer), the fifth straight section A5 (outer), and the fourth straight section A4 (outer) in this order.

[0108] As a result, the induced current i1 and the induced current i2 flowing in the coil portion 16 cancel each other out. That is, the electromotive force that tries to pass the induced current i1 and the electromotive force that tries to pass the induced current i2 cancel each other out.

[0109] As described above, in this embodiment, the induced currents i1 and i2 flowing in the coil portion 16 flow so as to cancel each other out. This suppresses the occurrence of losses due to the induced currents. As a result, it is possible to improve torque while suppressing an increase in the physical size of the motor 10. Furthermore, suppressing the occurrence of losses due to the induced currents suppresses heat generation in the coil portion 16. This allows for a motor with low heat generation.

[0110] 27 shows a coil section 16 that constitutes a part of a motor of the eighth embodiment. As shown in this figure, in this embodiment, one closed circuit 66 is formed in two circumferentially adjacent coil sections 16. Then, by setting the induced currents i1 and i2 flowing in the two circumferentially adjacent coil sections 16 so that they cancel each other out, it is possible to obtain the same effect as the motor of the seventh embodiment described above.

[0111] (Ninth embodiment) Next, a motor according to a ninth embodiment will be described. In the motor according to the ninth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0112] As shown in FIGS. 28 and 29, the motor of this embodiment is configured in the same manner as the motor 10 of the first embodiment described above, except that the dimensions of each part are set as follows.

[0113] As shown in Fig. 28, the vertical section laminate 56 has a rectangular cross section in which the radial dimension R1 is larger than the circumferential dimension S1 in a cross section cut along the radial direction. Also, as shown in Fig. 29, the circumferential dimension S2 of the vertical section 36 constituting the vertical section laminate 56 is larger than the radial dimension R2. Also, as shown in Fig. 28, the circumferential dimension S3 of the radially inner end of each phase conductor group 46U, 46V, 46W is set to be larger than the radial dimension R1 of the vertical section laminate 56 constituting each phase conductor group 46U, 46V, 46W.

[0114] As described above, in this embodiment, the circumferential dimension S3 of the radially inner end (the magnet 18 side of the rotor 12) of each phase conductor group 46U, 46V, 46W is set to be larger than the radial dimension R1 of the vertical section laminate 56 that constitutes each phase conductor group 46U, 46V, 46W. This setting allows the radial thickness of the coil body 32 to be reduced, thereby reducing the gap between the magnet 18 of the rotor 12 and the stator core 26. This reduces magnetic resistance. This further improves motor torque.

[0115] In this embodiment, the radial dimension R1 of the vertical lamination body 56 is larger than the circumferential dimension S1. This allows the cross-sectional area of ​​the vertical lamination body 56 to be secured while reducing the area where the vertical lamination body 56 faces the magnets 18 of the rotor 12. This makes it possible to suppress eddy currents that are generated in the vertical lamination body 56 by radial magnetic flux. As a result, the torque of the motor can be further improved.

[0116] Furthermore, in this embodiment, the circumferential dimension S2 of the vertical sections 36 constituting the vertical section lamination body 56 is larger than the radial dimension R2. This suppresses eddy currents that are generated in the vertical section lamination body 56 due to leakage flux that links the circumferential direction between the magnets 18 of the rotor 12. As a result, the torque of the motor can be further improved.

[0117] (10th and 11th embodiments) Next, motors according to a tenth and eleventh embodiments will be described. In the motors according to the tenth and eleventh embodiments, components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0118] 30 , in a coil body 32 constituting a part of the motor of the tenth embodiment, the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the second turn of the band member 34 is set to be larger than the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the first turn of the band member 34. Furthermore, the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the third turn of the band member 34 is set to be larger than the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the second turn of the band member 34. Furthermore, the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the fourth turn of the band member 34 is set to be larger than the circumferential dimension S2 of the vertical portion 36 of the coil portion 16 formed on the third turn of the band member 34. As a result, the vertical portion laminate 56 when cut radially has a substantially fan-like shape. The first to fourth turns of the belt member 34 are counted in order from the inside to the outside in the radial direction. The first to fourth turns of the belt member 34 correspond to the first to fourth layers of the belt member 34, respectively.

[0119] With the configuration described above, the cross-sectional area of ​​the vertical section laminate 56 can be increased compared to the motor 10 of the first embodiment, etc. This allows the electrical resistance of the vertical section laminate 56 to be reduced compared to the motor 10 of the first embodiment, etc. Furthermore, the space factor of the coil section 16 can be increased compared to the motor 10 of the first embodiment, etc.

[0120] As shown in Figures 31 and 32, the motor of the eleventh embodiment is configured similarly to the motor of the tenth embodiment, except that the number of divisions of the coil portion 16 arranged on the radially outer side is greater than the number of divisions of the coil portion 16 arranged on the radially inner side. In this embodiment, the vertical portion 36 formed on the fourth turn of the band member 34 has a three-division structure with two slits 60. In the motor of this embodiment, the area of ​​the vertical portion 36 formed on the fourth turn of the band member 34 that faces the magnet 18 (see Figure 1) can be reduced. This makes it possible to suppress eddy currents generated in the vertical portion laminate 56, further improving the torque of the motor.

[0121] (Twelfth embodiment) Next, a motor according to a twelfth embodiment will be described. In the motor according to the twelfth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0122] As shown in Figures 33 and 34, the motor of this embodiment has the same configuration as the motor of the third embodiment described above (see Figures 16 and 17), except that the configuration of each inter-coil connection portion 74 at the end portion 34C on the other circumferential side of the band member 34 and the end portion 34D on one circumferential side is different.

[0123] 33, each inter-coil connection portion 74 at the end portion 34C on the other circumferential side of the band member 34 has an extending end portion 74A that extends further toward one axial side than the end portion 34K on one axial side of the band member 34. In addition, each inter-coil connection portion 74 at the end portion 34D on one circumferential side of the band member 34 also has an extending end portion 74A that extends further toward one axial side than the end portion 34K on one axial side of the band member 34.

[0124] 34, with the end 34D on one circumferential side of the band member 34 and the end 34C on the other circumferential side overlapping each other in the radial direction, the extended end 74A of each inter-coil connection portion 74 formed at the end 34D on one circumferential side of the band member 34 and the extended end 74A of each inter-coil connection portion 74 formed at the end 34C on the other circumferential side of the band member 34 are connected by welding or soldering. In this way, in this embodiment, the inter-coil connection portions 74 are configured to include the extended end portions 74A, which makes it possible to facilitate the above-mentioned welding or soldering work.

[0125] (Thirteenth embodiment) Next, a motor according to a thirteenth embodiment will be described. In the motor according to the thirteenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0126] As shown in FIG. 35 , the coil body 32 of the motor of this embodiment is configured such that a plurality of band members 34 are wound and overlapped in the radial direction. FIG. 36 shows a plurality of coil portions 16 formed on each band member 34. Note that in FIG. 36 , the plurality of coil portions 16 formed on one band member 34 and the plurality of coil portions 16 formed on the other band members 34 are shown offset in the axial direction. Inter-coil connections 74 are provided at an end 34D on one circumferential side and an end 34C on the other circumferential side of each band member 34. Then, with the end 34D on one circumferential side of one band member 34 and the end 34C on the other circumferential side of the other band member 34 overlapping in the radial direction, each inter-coil connection 74 formed on the end 34D on one circumferential side of one band member 34 is connected to each inter-coil connection 74 formed on the end 34C on the other circumferential side of the other band member 34. This allows the plurality of coil portions 16 formed on one band member 34 to be connected in a predetermined connection state to the plurality of coil portions 16 formed on the other band member 34. Note that the configuration of the twelfth embodiment (see FIGS. 33 and 34) described above can be applied to the connection portions between the coil-to-coil connection portions 74 formed at the end portion 34D on one circumferential side of the one band member 34 and the coil-to-coil connection portions 74 formed at the end portion 34C on the other circumferential side of the other band member 34.

[0127] In the present embodiment described above, by providing each inter-coil connection portion 74 at the end portion 34D on one circumferential side and the end portion 34C on the other circumferential side of each band member 34, it is possible to connect multiple coil portions 16 formed on one band member 34 with multiple coil portions 16 formed on another band member 34 at the connection portion between the end portion 34D on one circumferential side of one band member 34 and the end portion 34C on the other circumferential side of the other band member 34.

[0128] (Fourteenth embodiment) Next, a motor according to a fourteenth embodiment will be described. In the motor according to the fourteenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof will be omitted.

[0129] 37 and 38 show a coil body 32 that constitutes a part of the motor of this embodiment. As shown in these figures, the coil body 32 of this embodiment is configured similarly to the coil body 32 of the motor 10 of the first embodiment (see FIG. 4), except for the following points. The coil body 32 of this embodiment is configured by winding four band members 34 one on top of the other. Furthermore, the coil body 32 of this embodiment is configured such that an end portion 34D on one circumferential side of one band member 34 and an end portion 34C on the other circumferential side of another band member 34 are connected in the same configuration as the thirteenth embodiment described above.

[0130] More specifically, the coil body 32 of this embodiment is configured such that four band members 34 connected continuously in the circumferential direction are wound up to the fifth turn. In other words, one band member 34 constitutes approximately 1.25 turns.

[0131] As shown in FIG. 38 , a portion of the coil body 32 where an end 34D on one circumferential side of one band member 34 and an end 34C on the other circumferential side of another band member 34 are arranged at the same circumferential position has a thicker radial thickness than other portions. The portion of the coil body 32 where an end 34D on one circumferential side of one band member 34 and an end 34C on the other circumferential side of the other band member 34 are arranged at the same circumferential position will be referred to as a thick portion 32A. The portion of the coil body 32 excluding the thick portion 32A will be referred to as a thin portion 32B. In the coil body 32 of this embodiment, four thick portions 32A are arranged circumferentially. Specifically, the four thick portions 32A are arranged at equal intervals (equal angular pitch) along the circumferential direction. In this embodiment, the thick portions 32A and the thin portions 32B are arranged alternately along the circumferential direction.

[0132] In this embodiment, a stepped portion 32C having a difference in height in the radial direction is formed at the boundary between the thin portion 32B and the thick portion 32A of the coil body 32 and on the stator core 26 side.

[0133] In the coil body 32 of the motor of this embodiment described above, the four thick-walled portions 32A are arranged at equal intervals (equal angular pitch) along the circumferential direction, which makes it easier to maintain the coil body 32 coaxial with the stator core 26 when the coil body 32 is arranged radially inside the stator core 26.

[0134] Furthermore, in this embodiment, a stepped portion 32C having a difference in height in the radial direction is formed at the boundary between the thin portion 32B and the thick portion 32A of the coil body 32, on the stator core 26 side. In other words, the coil body 32 is configured such that the magnet 18 side of the rotor 12 does not have as many irregularities as the stator core 26 side. As a result, in this embodiment, the gap between the inner circumferential surface of the coil body 32 and the outer circumferential surface of the magnet 18 can be made more uniform than in a configuration in which the stepped portion 32C is formed on the magnet 18 side of the rotor 12. As a result, a motor with smooth rotation and little torque fluctuation can be obtained.

[0135] In addition, in a configuration in which the coil body 32 is disposed along the radially outer surface of the stator core 26 as shown in FIG. 39 , a step portion 32C may be formed on the radially inner side of the coil body 32. Alternatively, as in the coil body 32 shown in FIG. 40 , a configuration may be adopted that takes into account both the case in which the coil body 32 is disposed along the radially outer surface of the stator core 26 and the case in which the coil body 32 is disposed along the radially inner surface of the stator core 26. That is, the coil body 32 may be applicable to both outer rotor motors and inner rotor motors. In the coil body 32 shown in FIG. 40 , step portions 32C are formed on both the radially outer surface and the radially inner surface of the coil body 32. In this case, it is only necessary to prevent the unevenness caused by the step portion 32C from becoming unevenly large on either the radially outer surface or the radially inner surface of the coil body 32.

[0136] (Fifteenth embodiment) Next, a motor according to a fifteenth embodiment will be described. In the motor according to the fifteenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0137] Figures 41 and 42 show the coil body 32 that forms part of the motor of this embodiment. As shown in these figures, the coil body 32 of this embodiment is configured in the same way as the coil body 32 of the motor 10 of the first embodiment, except for the following points.

[0138] In the coil body 32 of this embodiment, the input point 43 of each coil portion 16 includes an extended end portion 43A that extends toward one axial side beyond one axial end 34K of the band member 34. Furthermore, in the coil body 32 of this embodiment, three bypass connection portions 80, 82, and 84 are formed in a circumferentially intermediate portion of the band member 34. Three bypass connection portion-forming portions 34L, each shaped like a tongue, protrude toward one axial side of the band member 34. The three bypass connection portions 80, 82, and 84 are formed on the three bypass connection portion-forming portions 34L, respectively. Each of the three bypass connection portions 80, 82, and 84 includes a base portion 86 extending in the circumferential direction, a pair of extended end portion connecting portions 88 extending toward one axial side from both circumferential ends of the base portion 86, and an input line portion 90 extending toward one axial side from a circumferentially intermediate portion of the base portion 86. The bypass connection portions 80, 82, 84 are arranged in this order toward one circumferential side. Furthermore, the bypass connection portions 80, 82, 84 are arranged at positions corresponding to the end portion 34C on the other circumferential side and the end portion 34D on one circumferential side of the belt member 34 when the belt member 34 is wound in an annular shape.

[0139] The input point 43 (extending end 43A) of the W-phase coil section 16 arranged at the other circumferential end 34C of the band member 34 and the input point 43 (extending end 43A) of the W-phase coil section 16 arranged at the one circumferential end 34D of the band member 34 are respectively connected to a pair of extending end connection portions 88 of the bypass connection portion 80.

[0140] In addition, the input point 43 (extending end 43A) of the V-phase coil portion 16 arranged at the end 34C on the other circumferential side of the band member 34 and the input point 43 (extending end 43A) of the V-phase coil portion 16 arranged at the end 34D on one circumferential side of the band member 34 are respectively connected to a pair of extending end connection portions 88 of the bypass connection portion 82.

[0141] Furthermore, the input point 43 (extending end 43A) of the U-phase coil section 16 arranged at the other circumferential end 34C of the band member 34 and the input point 43 (extending end 43A) of the U-phase coil section 16 arranged at the one circumferential end 34D of the band member 34 are respectively connected to a pair of extending end connection portions 88 of the bypass connection portion 84.

[0142] As described above, in the coil body 32 of this embodiment, the two input points 43 of the coil portion 16 of each phase can be connected via the bypass connection portions 80, 82, and 84. In this configuration, the cross-sectional area of ​​the current path of the bypass connection portions 80, 82, and 84 can be secured, and therefore, a larger current can be accommodated.

[0143] Furthermore, in the coil body 32 of this embodiment, the bypass connection portions 80, 82, 84 are stacked in the radial direction and are not piled up in the axial direction, which prevents the coil body 32 from increasing in size in the axial direction, and thus prevents the motor from increasing in size in the axial direction.

[0144] The bypass connections 80, 82, 84 may be formed on one side or both sides of the belt member 34. Also, a configuration may be provided in which bypass connections are provided for connecting the neutral point 44 and the inter-coil connection portion 74.

[0145] (16th embodiment) Next, a motor according to a sixteenth embodiment will be described. In the motor according to the sixteenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof may be omitted.

[0146] 43, in the coil body 32 of the motor of this embodiment, the circumferential position of the end 34C on the other circumferential side of the band member 34 does not match the circumferential position of the end 34D on one circumferential side of the band member 34. Whether or not the circumferential position of the end 34C on the other circumferential side of the band member 34 and the circumferential position of the end 34D on one circumferential side of the band member 34 should match can be set appropriately taking into consideration the connection state of the multiple coil portions 16 formed on the band member 34, etc.

[0147] (17th embodiment) Next, a motor according to a seventeenth embodiment will be described. In the motor according to the seventeenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and the description thereof will be omitted.

[0148] 44, the coil body 32 of the motor of this embodiment has a configuration similar to that of the motor 10 of the third embodiment (see FIG. 16) arranged radially outside the coil body 32 of the motor 10 of the first embodiment (see FIG. 4). In this way, the coil body 32 may be configured such that a plurality of coil portions 16 connected in one connection state and a plurality of coil portions 16 connected in another connection state overlap in the radial direction.

[0149] (Other configurations) In addition to combining the configurations of the above-described embodiments, the following configurations can also be combined.

[0150] FIG. 45 is an enlarged cross-sectional view schematically illustrating the cross section of the insulator 28 disposed between the stator core 26 and the coil body 32. As shown in this figure, the insulator 28 is configured to include a base 50 formed of an insulating material and a soft magnetic portion 52 formed of a soft magnetic material within the base 50. Note that, in the insulator 28 of this embodiment, the entire insulator 28 is configured to include the soft magnetic portion 52 within the base 50. As an example, in this embodiment, a resin material is used for the base 50. Furthermore, in this embodiment, atomized powder of a soft magnetic metal such as iron is used for the soft magnetic portion 52. This configuration allows the magnetic flux of the magnet 18 to be introduced into the stator core 26 via the soft magnetic portion 52 within the insulator 28, thereby reducing the magnetic resistance between the magnet 18 and the stator core 26. As a result, the magnetic flux of the magnet 18 can be effectively utilized, thereby increasing the torque and reducing the size of the motor.

[0151] 46 has a coreless structure that does not include a stator core 26. The rotor 12 of the motor 118 of this embodiment includes a magnet 18 arranged radially inward relative to the coil body 32, and a magnet 18 arranged radially outward relative to the coil body 32.

[0152] 47 includes a coil body 32 arranged radially inside relative to the stator core 26, and a coil body 32 arranged radially outside relative to the stator core 26. The rotor 12 of the motor 120 of this embodiment includes a magnet 18 arranged radially inside relative to the radially inside coil body 32, and a magnet 18 arranged radially outside relative to the radially outside coil body 32.

[0153] 48 includes a magnet 18 fixed to the inner circumferential surface of the second cylindrical portion 24B of the rotor core 24, and a magnet 18 fixed to the outer circumferential surface of the second cylindrical portion 24B of the rotor core 24. The stator 14 of this motor 122 includes a stator core 26 and a coil body 32 arranged opposite the magnet 18 fixed to the inner circumferential surface of the second cylindrical portion 24B, and a stator core 26 and a coil body 32 arranged opposite the magnet 18 fixed to the outer circumferential surface of the second cylindrical portion 24B.

[0154] 49 includes a magnet fixing portion 126 provided at one axial end of the second cylindrical portion 24B, and a magnet 18 fixed to the magnet fixing portion 126. The stator 14 of this motor 124 includes a stator core 26 and a coil body 32 arranged opposite the radially inner surface of the magnet 18, and a stator core 26 and a coil body 32 arranged opposite the radially outer surface of the magnet 18.

[0155] As with the motors 118, 120, 122, and 124 described above, the number and arrangement of the coil bodies 32 constituting the stator 14, the arrangement of the magnets 18 of the rotor 12, the number of stator cores 26, etc. may be set appropriately taking into consideration the output characteristics and physical size required of the motor.

[0156] Furthermore, the shape of the coil portion 16 is not limited to the shapes shown in Figures 6 to 9, etc. For example, as shown in Figures 50 to 52, the coil portion 16 may have a shape different from the shapes shown in Figures 6 to 9, etc. In the coil portion 16 shown in Figures 50 to 52, parts that function in the same way as the coil portion 16 shaped as shown in Figures 6 to 9, etc. are given the same reference numerals as the respective parts of the coil portion 16 shaped as shown in Figures 6 to 9, etc.

[0157] (18th embodiment) Next, a motor according to an eighteenth embodiment will be described. In the motor according to the eighteenth embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0158] As shown in Fig. 53, the coil body 32 of the motor of the eighteenth embodiment has a configuration in which a plurality of band members 34 wound annularly in the circumferential direction are stacked in the radial direction. Specifically, in this embodiment, three band members 34 are stacked in the radial direction. Here, the three band members 34 are referred to as the first layer band member 34, the second layer band member 34, and the third layer band member 34, in that order from the radially inner side to the radially outer side. Note that, in this embodiment, one layer is formed by a single band member 34, but the present invention is not limited to this. For example, one layer may be formed by a plurality of band members 34 joined together in the circumferential direction.

[0159] 54 shows a diagram in which the plurality of coil portions 16 formed on the first layer of band member 34, the plurality of coil portions 16 formed on the second layer of band member 34, and the plurality of coil portions 16 formed on the third layer of band member 34 are offset in the axial direction. Note that the plurality of coil portions 16 formed on the second layer of band member 34 are offset to the other axial side relative to the plurality of coil portions 16 formed on the first layer of band member 34, and the plurality of coil portions 16 formed on the third layer of band member 34 are offset to the other axial side relative to the plurality of coil portions 16 formed on the second layer of band member 34.

[0160] On the first layer of the band member 34, 20 U-phase coil portions 16U, 20 V-phase coil portions 16V, and 20 W-phase coil portions 16W are formed.

[0161] The 20 U-phase coil portions 16U formed on the first layer of the band member 34 are connected in a predetermined connection state between the input portion 128 and the output portion 130. More specifically, of the 20 U-phase coil portions 16U, 10 U-phase coil portions 16U form a first coil group 42U1 connected in series, and the remaining 10 U-phase coil portions 16U form a second coil group 42U2 connected in series. The first U-phase coil group 42U1 and the second U-phase coil group 42U2 are connected in parallel.

[0162] Here, the ten coil sections 16U constituting the first coil group 42U1 of the U phase are numbered X1, X2, X3, X4, X5, X6, X7, X8, X9, and X10 in order from the input point 43 side to the output point 45 side. In the following description, these numbers X1 to X10 may be added in parentheses to the end of the reference numeral indicating the coil section 16U. In the drawings, due to space limitations, the numbers X1 to X10 may only be added to the locations adjacent to the coil section 16U.

[0163] As shown in FIG. 54 (also see FIG. 6), on the first layer of the band member 34, the coil portion 16U(X10), the coil portion 16U(X1), the coil portion 16U(X2), the coil portion 16U(X3), the coil portion 16U(X4), the coil portion 16U(X5), the coil portion 16U(X6), the coil portion 16U(X7), the coil portion 16U(X8), and the coil portion 16U(X9) are arranged in this order from one circumferential side to the other. The first wire connection 62 of the coil portion 16U(X1) serves as the input point 43. The first wire connection 62 of the coil portion 16U(X2) is connected to the second wire connection 64 of the coil portion 16U(X1). The first wire connection 62 of the coil portion 16U(X3) is connected to the second wire connection 64 of the coil portion 16U(X2). Furthermore, the first wire connection 62 of the coil portion 16U(X4) is connected to the second wire connection 64 of the coil portion 16U(X3). Furthermore, the first wire connection 62 of the coil portion 16U(X5) is connected to the second wire connection 64 of the coil portion 16U(X4). Furthermore, the first wire connection 62 of the coil portion 16U(X6) is connected to the second wire connection 64 of the coil portion 16U(X5). Furthermore, the first wire connection 62 of the coil portion 16U(X7) is connected to the second wire connection 64 of the coil portion 16U(X6). Furthermore, the first wire connection 62 of the coil portion 16U(X8) is connected to the second wire connection 64 of the coil portion 16U(X7). Furthermore, the first wire connection 62 of the coil portion 16U(X9) is connected to the second wire connection 64 of the coil portion 16U(X8). The second connection 64 of the coil section 16U (X9) and the first connection 62 of the coil section 16U (X10) are connected to each other to form an inter-coil connection section 74. The second connection 64 of the coil section 16U (X10) forms an output point 45.

[0164] Furthermore, the ten coil sections 16U constituting the U-phase second coil group 42U2 are numbered X1', X2', X3', X4', X5', X6', X7', X8', X9', and X10' in order from the output point 45 side to the input point 43 side. In the following description, these numbers X1' to X10' may be added in parentheses to the end of the reference numeral indicating the coil section 16U. In the drawings, due to space limitations, the numbers X1' to X10' may only be added to locations adjacent to the coil section 16U.

[0165] On the first layer of the band member 34, the coil portion 16U(X10'), the coil portion 16U(X1'), the coil portion 16U(X2'), the coil portion 16U(X3'), the coil portion 16U(X4'), the coil portion 16U(X5'), the coil portion 16U(X6'), the coil portion 16U(X7'), the coil portion 16U(X8'), and the coil portion 16U(X9') are arranged in this order from one circumferential side to the other. The first wire connection portion 62 of the coil portion 16U(X1') serves as the output point 45. The first wire connection portion 62 of the coil portion 16U(X2') is connected to the second wire connection portion 64 of the coil portion 16U(X1'). The first wire connection portion 62 of the coil portion 16U(X3') is connected to the second wire connection portion 64 of the coil portion 16U(X2'). Furthermore, the first wire connection 62 of the coil portion 16U(X4') is connected to the second wire connection 64 of the coil portion 16U(X3'). Furthermore, the first wire connection 62 of the coil portion 16U(X5') is connected to the second wire connection 64 of the coil portion 16U(X4'). Furthermore, the first wire connection 62 of the coil portion 16U(X6') is connected to the second wire connection 64 of the coil portion 16U(X5'). Furthermore, the first wire connection 62 of the coil portion 16U(X7') is connected to the second wire connection 64 of the coil portion 16U(X6'). Furthermore, the first wire connection 62 of the coil portion 16U(X8') is connected to the second wire connection 64 of the coil portion 16U(X7'). Furthermore, the first wire connection 62 of the coil portion 16U(X9') is connected to the second wire connection 64 of the coil portion 16U(X8'). The second connection portion 64 of the coil portion 16U(X9') and the first connection portion 62 of the coil portion 16U(X10') are connected to each other to form an inter-coil connection portion 74. The second connection portion 64 of the coil portion 16U(X10') serves as an input point 43.

[0166] The input point 43 of the coil section 16U(X1) and the input point 43 of the coil section 16U(X10') are connected to each other via an input section 128. The output point 45 of the coil section 16U(X10) and the output point 45 of the coil section 16U(X1') are connected to each other via an output section 130. The input section 128 connected to the input point 43 of the coil section 16U(X1) and the input point 43 of the coil section 16U(X10') will be referred to as the first layer U-phase input section 128(1inU). The output section 130 connected to the output point 45 of the coil section 16U(X10) and the output point 45 of the coil section 16U(X1') will be referred to as the first layer U-phase output section 130(1outU).

[0167] The 20 V-phase coil portions 16V and the 20 W-phase coil portions 16W formed on the first layer of strip member 34 are connected in the same relationship as the 20 U-phase coil portions 16U. Note that, below, the connection relationship of the 20 V-phase coil portions 16V and the connection relationship of the 20 W-phase coil portions 16W may be explained using only text. That is, in the drawings, the reference numerals indicating the 20 V-phase coil portions 16V and the 20 W-phase coil portions 16W may be omitted.

[0168] The 20 V-phase coil portions 16V formed on the first layer of the band member 34 are connected in a predetermined connection state between the input portion 128 and the output portion 130. More specifically, of the 20 V-phase coil portions 16V, 10 V-phase coil portions 16V form a first coil group 42V1 connected in series, and the remaining 10 V-phase coil portions 16V form a second coil group 42V2 connected in series. The first V-phase coil group 42V1 and the second V-phase coil group 42V2 are connected in parallel.

[0169] Here, the ten coil sections 16V constituting the V-phase first coil group 42V1 are numbered Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, and Y10 in order from the input point 43 side to the output point 45 side. In the following description, these numbers Y1 to Y10 may be added in parentheses to the end of the reference numeral indicating the coil section 16V.

[0170] On the first layer of the band member 34, the coil portion 16V(Y7), the coil portion 16V(Y8), the coil portion 16V(Y9), the coil portion 16V(Y10), the coil portion 16V(Y1), the coil portion 16V(Y2), the coil portion 16V(Y3), the coil portion 16V(Y4), the coil portion 16V(Y5), and the coil portion 16V(Y6) are arranged in this order from one circumferential side to the other. The first wire connection 62 of the coil portion 16V(Y1) serves as the input point 43. The first wire connection 62 of the coil portion 16V(Y2) is connected to the second wire connection 64 of the coil portion 16V(Y1). The first wire connection 62 of the coil portion 16V(Y3) is connected to the second wire connection 64 of the coil portion 16V(Y2). The first wire connection 62 of the coil portion 16V(Y4) is connected to the second wire connection 64 of the coil portion 16V(Y3). The first wire connection 62 of the coil portion 16V(Y5) is connected to the second wire connection 64 of the coil portion 16V(Y4). The first wire connection 62 of the coil portion 16V(Y6) is connected to the second wire connection 64 of the coil portion 16V(Y5). The second wire connection 64 of the coil portion 16V(Y6) and the first wire connection 62 of the coil portion 16V(Y7) are connected to each other to form an inter-coil connection portion 74. The first wire connection 62 of the coil portion 16V(Y8) is connected to the second wire connection 64 of the coil portion 16V(Y7). The first wire connection 62 of the coil portion 16V(Y9) is connected to the second wire connection 64 of the coil portion 16V(Y8). The first connection 62 of the coil part 16V (Y10) is connected to the second connection 64 of the coil part 16V (Y9). The second connection 64 of the coil part 16V (Y10) serves as an output point 45.

[0171] The ten coil sections 16V constituting the V-phase second coil group 42V2 are numbered Y1', Y2', Y3', Y4', Y5', Y6', Y7', Y8', Y9', and Y10' in order from the output point 45 side to the input point 43 side. In the following description, these numbers Y1' to Y10' may be added in parentheses to the end of the reference numeral indicating the coil section 16V.

[0172] On the first layer of the band member 34, the coil portion 16V(Y6'), coil portion 16V(Y7'), coil portion 16V(Y8'), coil portion 16V(Y9'), coil portion 16V(Y10'), coil portion 16V(Y1'), coil portion 16V(Y2'), coil portion 16V(Y3'), coil portion 16V(Y4'), and coil portion 16V(Y5') are arranged in this order from one circumferential side to the other. The first wire connection 62 of the coil portion 16V(Y1') serves as the output point 45. The first wire connection 62 of the coil portion 16V(Y2') is connected to the second wire connection 64 of the coil portion 16V(Y1'). The first wire connection 62 of the coil portion 16V(Y3') is connected to the second wire connection 64 of the coil portion 16V(Y2'). Furthermore, the first connection 62 of the coil portion 16V(Y4') is connected to the second connection 64 of the coil portion 16V(Y3'). Furthermore, the first connection 62 of the coil portion 16V(Y5') is connected to the second connection 64 of the coil portion 16V(Y4'). Furthermore, the second connection 64 of the coil portion 16V(Y5') and the first connection 62 of the coil portion 16V(Y6') are connected to each other to form an inter-coil connection portion 74. Furthermore, the first connection 62 of the coil portion 16V(Y7') is connected to the second connection 64 of the coil portion 16V(Y6'). Furthermore, the first connection 62 of the coil portion 16V(Y8') is connected to the second connection 64 of the coil portion 16V(Y7'). Furthermore, the first wire connection 62 of the coil portion 16V (Y9') is connected to the second wire connection 64 of the coil portion 16V (Y8'). Furthermore, the first wire connection 62 of the coil portion 16V (Y10') is connected to the second wire connection 64 of the coil portion 16V (Y9'). Furthermore, the second wire connection 64 of the coil portion 16V (Y10') serves as the input point 43.

[0173] The input point 43 of the coil section 16V(Y1) and the input point 43 of the coil section 16V(Y10') are connected to each other via an input section 128. The output point 45 of the coil section 16V(Y10) and the output point 45 of the coil section 16V(Y1') are connected to each other via an output section 130. The input section 128 connected to the input point 43 of the coil section 16V(Y1) and the input point 43 of the coil section 16V(Y10') will be referred to as the V-phase input section 128(1inV) of the first layer. The output section 130 connected to the output point 45 of the coil section 16V(Y10) and the output point 45 of the coil section 16V(Y1') will be referred to as the V-phase output section 130(1outV) of the first layer.

[0174] The 20 W-phase coil portions 16W formed on the first layer of the band member 34 are connected in a predetermined connection state between the input portion 128 and the output portion 130. More specifically, 10 of the 20 W-phase coil portions 16W form a first coil group 42W1 connected in series, and the remaining 10 W-phase coil portions 16W form a second coil group 42W2 connected in series. The first W-phase coil group 42W1 and the second W-phase coil group 42W2 are connected in parallel.

[0175] Here, the ten coil sections 16W constituting the W-phase first coil group 42W1 are numbered Z1, Z2, Z3, Z4, Z5, Z6, Z7, Z8, Z9, and Z10 in order from the input point 43 side to the output point 45 side. In the following description, these numbers Z1 to Z10 may be added in parentheses to the end of the reference numeral indicating the coil section 16W.

[0176] On the first layer of the band member 34, the coil portion 16W(Z3), the coil portion 16W(Z4), the coil portion 16W(Z5), the coil portion 16W(Z6), the coil portion 16W(Z7), the coil portion 16W(Z8), the coil portion 16W(Z9), the coil portion 16W(Z10), the coil portion 16W(Z1), and the coil portion 16W(Z2) are arranged in this order from one circumferential side to the other. The first wire connection portion 62 of the coil portion 16W(Z1) serves as the input point 43. The first wire connection portion 62 of the coil portion 16W(Z2) is connected to the second wire connection portion 64 of the coil portion 16W(Z1). The second wire connection portion 64 of the coil portion 16W(Z2) and the first wire connection portion 62 of the coil portion 16W(Z3) are connected to each other as the inter-coil connection portion 74. Furthermore, the first wire connection 62 of the coil portion 16W(Z4) is connected to the second wire connection 64 of the coil portion 16W(Z3). Furthermore, the first wire connection 62 of the coil portion 16W(Z5) is connected to the second wire connection 64 of the coil portion 16W(Z4). Furthermore, the first wire connection 62 of the coil portion 16W(Z6) is connected to the second wire connection 64 of the coil portion 16W(Z5). Furthermore, the first wire connection 62 of the coil portion 16W(Z7) is connected to the second wire connection 64 of the coil portion 16W(Z6). Furthermore, the first wire connection 62 of the coil portion 16W(Z8) is connected to the second wire connection 64 of the coil portion 16W(Z7). Furthermore, the first wire connection 62 of the coil portion 16W(Z9) is connected to the second wire connection 64 of the coil portion 16W(Z8). The first connection 62 of the coil 16W (Z10) is connected to the second connection 64 of the coil 16W (Z9). The second connection 64 of the coil 16W (Z10) serves as an output point 45.

[0177] The ten coil sections 16W constituting the W-phase second coil group 42W2 are numbered Z1', Z2', Z3', Z4', Z5', Z6', Z7', Z8', Z9', and Z10' in order from the output point 45 side to the input point 43 side. In the following description, these numbers Z1' to Z10' may be added in parentheses to the end of the reference numeral indicating the coil section 16W.

[0178] On the first layer of the band member 34, the coil portion 16W(Z3'), the coil portion 16W(Z4'), the coil portion 16W(Z5'), the coil portion 16W(Z6'), the coil portion 16W(Z7'), the coil portion 16W(Z8'), the coil portion 16W(Z9'), the coil portion 16W(Z10'), the coil portion 16W(Z1'), and the coil portion 16W(Z2') are arranged in this order from one circumferential side to the other. The first wire connection portion 62 of the coil portion 16W(Z1') serves as the output point 45. The first wire connection portion 62 of the coil portion 16W(Z2') is connected to the second wire connection portion 64 of the coil portion 16W(Z1'). The second connection 64 of the coil portion 16W(Z2') and the first connection 62 of the coil portion 16W(Z3') are connected to each other to form an inter-coil connection portion 74. The first connection 62 of the coil portion 16W(Z4') is connected to the second connection 64 of the coil portion 16W(Z3'). The first connection 62 of the coil portion 16W(Z5') is connected to the second connection 64 of the coil portion 16W(Z4'). The first connection 62 of the coil portion 16W(Z6') is connected to the second connection 64 of the coil portion 16W(Z5'). The first connection 62 of the coil portion 16W(Z7') is connected to the second connection 64 of the coil portion 16W(Z6'). Furthermore, the first wire connection 62 of the coil portion 16W (Z8') is connected to the second wire connection 64 of the coil portion 16W (Z7'). Furthermore, the first wire connection 62 of the coil portion 16W (Z9') is connected to the second wire connection 64 of the coil portion 16W (Z8'). Furthermore, the first wire connection 62 of the coil portion 16W (Z10') is connected to the second wire connection 64 of the coil portion 16W (Z9'). Furthermore, the second wire connection 64 of the coil portion 16W (Z10') serves as the input point 43.

[0179] The input point 43 of the coil portion 16W(Z1) and the input point 43 of the coil portion 16W(Z10') are connected to each other via an input portion 128. The output point 45 of the coil portion 16W(Z10) and the output point 45 of the coil portion 16W(Z1') are connected to each other via an output portion 130. The input portion 128 connected to the input point 43 of the coil portion 16W(Z1) and the input point 43 of the coil portion 16W(Z10') will be referred to as the W-phase input portion 128(1inW) of the first layer. The output portion 130 connected to the output point 45 of the coil portion 16W(Z10) and the output point 45 of the coil portion 16W(Z1') will be referred to as the W-phase output portion 130(1outW) of the first layer.

[0180] The second-layer belt member 34 and the plurality of coil portions 16 etc. formed thereon have the same configuration as the first-layer belt member 34 and the plurality of coil portions 16 etc. formed thereon. That is, the pattern (circuit type) of the plurality of coil portions 16 formed on the second-layer belt member 34 matches the pattern (circuit type) of the plurality of coil portions 16 formed on the first-layer belt member 34. Furthermore, the pattern (circuit type) of each input portion 128 and each output portion 130 formed on the second-layer belt member 34 matches the pattern (circuit type) of each input portion 128 and each output portion 130 formed on the first-layer belt member 34. Therefore, some portions of the plurality of coil portions 16 etc. formed on the second-layer belt member 34 that correspond to the plurality of coil portions 16 etc. formed on the first-layer belt member 34 are assigned the same reference numerals as the portions corresponding to the plurality of coil portions 16 etc. formed on the first-layer belt member 34. Here, each input section 128 and each output section 130 in the second layer of belt member 34 will be referred to as the second layer U-phase input section 128 (2inU), the second layer U-phase output section 130 (2outU), the second layer V-phase input section 128 (2inV), the second layer V-phase output section 130 (2outV), the second layer W-phase input section 128 (2inW), and the second layer W-phase output section 130 (2outW).

[0181] The configuration of the third-layer belt member 34 and the plurality of coil portions 16 etc. formed thereon is similar to the configuration of the first-layer belt member 34 and the plurality of coil portions 16 etc. formed thereon. That is, the pattern (circuit type) of the plurality of coil portions 16 formed on the third-layer belt member 34 matches the pattern (circuit type) of the plurality of coil portions 16 formed on the first-layer belt member 34. Furthermore, the pattern (circuit type) of each input portion 128 formed on the third-layer belt member 34 matches the pattern (circuit type) of each input portion 128 formed on the first-layer belt member 34. Therefore, some portions of the plurality of coil portions 16 etc. formed on the third-layer belt member 34 that correspond to the plurality of coil portions 16 etc. formed on the first-layer belt member 34 are assigned the same reference numerals as the portions corresponding to the plurality of coil portions 16 etc. formed on the first-layer belt member 34. Here, the input sections 128 and output sections 130 in the third layer of the band member 34 will be referred to as the third layer U-phase input section 128 (3inU), the third layer U-phase output section 130 (3outU), the third layer V-phase input section 128 (3inV), the third layer V-phase output section 130 (3outV), the third layer W-phase input section 128 (3inW), and the third layer W-phase output section 130 (3outW). In this embodiment, the third layer U-phase output section 130 (3outU), the third layer V-phase output section 130 (3outV), and the third layer W-phase output section 130 (3outW) are connected to one another via the neutral point connection pattern section 72.

[0182] As shown in FIG. 54, the second-layer belt member 34 is offset by an angle α [deg] toward one side in the circumferential direction relative to the first-layer belt member 34. As a result, the end of the U-phase output section 130 (1 out U) of the first layer and the end of the U-phase input section 128 (2 in U) of the second layer are arranged at the same circumferential position. Furthermore, the end of the V-phase output section 130 (1 out V) of the first layer and the end of the V-phase input section 128 (2 in V) of the second layer are arranged at the same circumferential position. Furthermore, the end of the W-phase output section 130 (1 out W) of the first layer and the end of the W-phase input section 128 (2 in W) of the second layer are arranged at the same circumferential position. As shown in FIG. 54 (also see FIG. 6), in this embodiment, the angle α [deg] is twice the circumferential angle from the circumferential center of the second straight section A2 of the coil section 16 to the circumferential center of the fifth straight section A5.

[0183] As shown in Figure 54, the belt member 34 in the third layer is disposed offset by an angle α [deg] to one side in the circumferential direction relative to the belt member 34 in the second layer. As a result, an end of the U-phase output section 130 (2outU) in the second layer and an end of the U-phase input section 128 (3inU) in the third layer are disposed at the same position in the circumferential direction. Furthermore, an end of the V-phase output section 130 (2outV) in the second layer and an end of the V-phase input section 128 (3inV) in the third layer are disposed at the same position in the circumferential direction. Furthermore, an end of the W-phase output section 130 (2outW) in the second layer and an end of the W-phase input section 128 (3inW) in the third layer are disposed at the same position in the circumferential direction.

[0184] As shown in FIG. 55, an end of the U-phase output section 130 (1outU) on the first layer and an end of the U-phase input section 128 (2inU) on the second layer are connected at the same circumferential position. Furthermore, an end of the U-phase output section 130 (2outU) on the second layer and an end of the U-phase input section 128 (3inU) on the third layer are connected at the same circumferential position. Furthermore, an end of the U-phase output section 130 (1outU) on the first layer and an end of the U-phase input section 128 (2inU) on the second layer are connected via vias, wiring, etc. Furthermore, an end of the U-phase output section 130 (2outU) on the second layer and an end of the U-phase input section 128 (3inU) on the third layer are connected via vias, wiring, etc.

[0185] Although not shown in the figures, an end of the V-phase output section 130 (1 out V) of the first layer and an end of the V-phase input section 128 (2 in V) of the second layer are connected at the same circumferential position. Furthermore, an end of the V-phase output section 130 (2 out V) of the second layer and an end of the V-phase input section 128 (3 in V) of the third layer are connected at the same circumferential position. Furthermore, an end of the W-phase output section 130 (1 out W) of the first layer and an end of the W-phase input section 128 (2 in W) of the second layer are connected at the same circumferential position. Furthermore, an end of the W-phase output section 130 (2 out W) of the second layer and an end of the W-phase input section 128 (3 in W) of the third layer are connected at the same circumferential position.

[0186] The first layer U-phase input section 128 (1 in U), the first layer V-phase input section 128 (1 in V), and the first layer W-phase input section 128 (1 in W) are each connected to a power supply.

[0187] The circumferential length of the second-layer band member 34 is longer than the circumferential length of the first-layer band member 34. Furthermore, the circumferential length of the third-layer band member 34 is longer than the circumferential length of the second-layer band member 34. Therefore, in this embodiment, the circumferential width of the pattern of the plurality of coil portions 16 formed on the second-layer band member 34 is wider than the circumferential width of the pattern of the plurality of coil portions 16 formed on the first-layer band member 34. Furthermore, the circumferential width of the pattern of the plurality of coil portions 16 formed on the third-layer band member 34 is wider than the circumferential width of the pattern of the plurality of coil portions 16 formed on the second-layer band member 34.

[0188] As shown in Figures 53, 54 and 55, in the coil body 32 of the motor of this embodiment described above, the output section 130 of the first layer and the input section 128 of the second layer can be connected at the same circumferential position, and the output section 130 of the second layer and the input section 128 of the third layer can be connected at the same circumferential position.

[0189] Furthermore, in the coil body 32 of this embodiment, the circumferential positions of the portions 34M (both circumferential ends of the first-layer band member 34) that are radially overlapped and joined in the first-layer band member 34, the circumferential positions of the portions 34M (both circumferential ends of the second-layer band member 34) that are radially overlapped and joined in the second-layer band member 34, and the circumferential positions of the portions 34M (both circumferential ends of the third-layer band member 34) that are radially overlapped and joined in the third-layer band member 34 can be offset in the circumferential direction. As a result, in the coil body 32 of this embodiment, radial distortion of the coil body 32 can be suppressed compared to a configuration in which the portions 34M of the band members 34 of each layer are arranged at the same circumferential position. Furthermore, in the coil body 32 of this embodiment, the patterns (circuit types) of the multiple coil portions 16 formed on the band members 34 of each layer are consistent with each other. As a result, the patterns of the multiple coils 16 of each layer can be similarly designed, thereby reducing the number of design steps.

[0190] Although the coil body 32 of this embodiment has been described as an example in which the band member 34 is formed in three layers, the present disclosure is not limited to this. For example, the band member 34 may be formed in two layers, or in four or more layers. In this case, by adjusting the positions of the input section 128 and the output section 130, a configuration can be achieved in which the number of band members 34 corresponding to an integer multiple of the aforementioned α is stacked.

[0191] (19th embodiment) Next, a motor according to a 19th embodiment will be described. In the motor according to the 19th embodiment, components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0192] 56 shows a diagram in which the plurality of coil portions 16 formed on the first layer of band member 34 and the plurality of coil portions 16 formed on the second layer of band member 34 are offset in the axial direction. The plurality of coil portions 16 formed on the second layer of band member 34 are offset to the other axial side relative to the plurality of coil portions 16 formed on the first layer of band member 34. As shown in this figure, the coil body 32 of the motor of this embodiment has the same configuration as the coil body 32 of the motor of the above-mentioned 18th embodiment, except that the plurality of coil portions 16 formed on the second layer of band member 34 have the configuration described below.

[0193] In the plurality of coil portions 16 formed on the second layer of band member 34, portions corresponding to portions (portions drawn with solid lines) formed on one surface 34A (see FIG. 53) of the band member 34 in the plurality of coil portions 16 formed on the first layer of band member 34 are formed on the other surface 34B (see FIG. 53) of the band member 34. Furthermore, in the plurality of coil portions 16 formed on the second layer of band member 34, portions corresponding to portions (portions drawn with dashed lines) formed on the other surface 34B of the band member 34 in the plurality of coil portions 16 formed on the first layer of band member 34 are formed on the one surface 34A of the band member 34. Below, a comparison will be made between the plurality of U-phase coil portions 16U formed on the first layer of band member 34 and the plurality of U-phase coil portions 16U formed on the second layer of band member 34.

[0194] 57 shows a U-phase coil portion 16U formed on the first layer of band member 34. As shown in this figure, in the U-phase coil portion 16U formed on the first layer of band member 34, a first straight line portion A1, a second straight line portion A2, and a third straight line portion A3 are formed on one surface 34A of the band member 34. In addition, in the U-phase coil portion 16U formed on the first layer of band member 34, a fourth straight line portion A4, a fifth straight line portion A5, and a sixth straight line portion A6 are formed on the other surface 34B of the band member 34. Although not shown, in the V-phase coil portion 16V formed on the first layer of band member 34, the first straight line portion A1, the second straight line portion A2, and the third straight line portion A3 are formed on one surface 34A of the band member 34. In the V-phase coil portion 16V formed on the first layer of band member 34, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 are formed on the other surface 34B of the band member 34. In the W-phase coil portion 16W formed on the first layer of band member 34, the first straight portion A1, the second straight portion A2, and the third straight portion A3 are formed on one surface 34A of the band member 34. In the W-phase coil portion 16W formed on the first layer of band member 34, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 are formed on the other surface 34B of the band member 34.

[0195] 58 shows a U-phase coil portion 16U formed on the second layer of band member 34. As shown in this figure, in the U-phase coil portion 16U formed on the second layer of band member 34, the first straight line portion A1, the second straight line portion A2, and the third straight line portion A3 are formed on the other surface 34B of the band member 34. In addition, in the U-phase coil portion 16U formed on the second layer of band member 34, the fourth straight line portion A4, the fifth straight line portion A5, and the sixth straight line portion A6 are formed on one surface 34A of the band member 34. Although not shown, in the V-phase coil portion 16V formed on the second layer of band member 34, the first straight line portion A1, the second straight line portion A2, and the third straight line portion A3 are formed on the other surface 34B of the band member 34. In the V-phase coil portion 16V formed on the second-layer band member 34, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 are formed on one surface 34A of the band member 34. In the W-phase coil portion 16W formed on the second-layer band member 34, the first straight portion A1, the second straight portion A2, and the third straight portion A3 are formed on the other surface 34B of the band member 34. In the W-phase coil portion 16W formed on the second-layer band member 34, the fourth straight portion A4, the fifth straight portion A5, and the sixth straight portion A6 are formed on one surface 34A of the band member 34.

[0196] The coil body 32 of the motor of this embodiment described above can also provide the same effects as the coil body 32 of the motor of the aforementioned 18th embodiment.

[0197] (Twentyth embodiment) Next, a motor according to a twentieth embodiment will be described. In the motor according to the twentieth embodiment, components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0198] As shown in Figure 59, in the coil body 32 of the motor of this embodiment, the circumferential positions of the portions 34M that are radially overlapped and joined in the first layer of band member 34, the circumferential positions of the portions 34M that are radially overlapped and joined in the second layer of band member 34, and the circumferential positions of the portions 34M that are radially overlapped and joined in the third layer of band member 34 are arranged more dispersedly in the circumferential direction than the coil body 32 of the motor of the aforementioned 18th embodiment (see Figure 53).

[0199] 60 shows a diagram in which the plurality of coil portions 16 formed on the first layer of band member 34 and the plurality of coil portions 16 formed on the second layer of band member 34 are offset in the axial direction. The plurality of coil portions 16 formed on the second layer of band member 34 are offset to the other axial side relative to the plurality of coil portions 16 formed on the first layer of band member 34. As shown in this figure, the coil body 32 of the motor of this embodiment has the same configuration as the coil body 32 of the motor of the above-mentioned 18th embodiment, except that the positions of the input portion 128 and the output portion 130 in the band member 34 of each layer are changed in the circumferential direction. The plurality of coil portions 16 formed on the third layer of band member 34 are not shown.

[0200] In the coil body 32 of the motor of this embodiment described above, by changing the positions of the input section 128 and the output section 130 in the band member 34 of each layer, the portions 34M that are overlapped and joined radially in the band member 34 of each layer can be dispersed circumferentially more than in the coil body 32 of the motor of the 18th embodiment described above (see Figure 53).

[0201] (21st embodiment) Next, a motor according to a 21st embodiment will be described. In the motor according to the 21st embodiment, components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0202] 61 shows a diagram in which the plurality of coil portions 16 formed on the first-layer band member 34, the plurality of coil portions 16 formed on the second-layer band member 34, the plurality of coil portions 16 formed on the third-layer band member 34, and the plurality of coil portions 16 formed on the fourth-layer band member 34 are offset in the axial direction. That is, the coil body 32 of the motor of the 21st embodiment is configured such that four band members 34 are stacked in the radial direction. Note that the plurality of coil portions 16 formed on the second-layer band member 34 are offset to the other axial side from the plurality of coil portions 16 formed on the first-layer band member 34, the plurality of coil portions 16 formed on the third-layer band member 34 are offset to the other axial side from the plurality of coil portions 16 formed on the second-layer band member 34, and the plurality of coil portions 16 formed on the fourth-layer band member 34 are offset to the other axial side from the plurality of coil portions 16 formed on the third-layer band member 34.

[0203] The multiple coil sections 16, the input sections 128, and the output sections 130 formed on the first layer of belt member 34 and the multiple coil sections 16, the input sections 128, and the output sections 130 formed on the third layer of belt member 34 have the same configuration. Also, the multiple coil sections 16, the input sections 128, and the output sections 130 formed on the second layer of belt member 34 and the multiple coil sections 16, the input sections 128, and the output sections 130 formed on the fourth layer of belt member 34 have the same configuration. Each input section 128 and each output section 130 in the fourth layer of belt member 34 will be referred to as the fourth layer U-phase input section 128 (4inU), the fourth layer U-phase output section 130 (4outU), the fourth layer V-phase input section 128 (4inV), the fourth layer V-phase output section 130 (4outV), the fourth layer W-phase input section 128 (4inW), and the fourth layer W-phase output section 130 (4outW).

[0204] The second layer of belt member 34 is disposed at the same circumferential position as the first layer of belt member 34. In this state, the U-phase input portion 128 (1 in U) of the first layer and the U-phase input portion 128 (2 in U) of the second layer are disposed at the same circumferential position. The U-phase input portion 128 (1 in U) of the first layer and the U-phase input portion 128 (2 in U) of the second layer are connected to each other. The V-phase input portion 128 (1 in V) of the first layer and the V-phase input portion 128 (2 in V) of the second layer are disposed at the same circumferential position. The V-phase input portion 128 (1 in V) of the first layer and the V-phase input portion 128 (2 in V) of the second layer are connected to each other. The W-phase input portion 128 (1 in W) of the first layer and the W-phase input portion 128 (2 in W) of the second layer are disposed at the same circumferential position. Furthermore, the W-phase input section 128 (1 in W) of the first layer and the W-phase input section 128 (2 in W) of the second layer are connected to each other.

[0205] The third-layer belt member 34 is disposed offset by an angle of 2×α [deg] toward one side in the circumferential direction relative to the second-layer belt member 34. In this state, the U-phase input section 128 (3inU) of the third layer and the U-phase output section 130 (2outU) of the second layer are disposed at the same position in the circumferential direction. The U-phase input section 128 (3inU) of the third layer and the U-phase output section 130 (2outU) of the second layer are also connected to each other. This results in the multiple U-phase coil sections 16U formed on the second-layer belt member 34 and the multiple U-phase coil sections 16U formed on the third-layer belt member 34 being connected in series. The V-phase input section 128 (3inV) of the third layer and the V-phase output section 130 (2outV) of the second layer are also disposed at the same position in the circumferential direction. The V-phase input section 128 (3inV) of the third layer and the V-phase output section 130 (2outV) of the second layer are also connected to each other. As a result, the plurality of V-phase coil portions 16V formed on the second-layer belt member 34 and the plurality of V-phase coil portions 16V formed on the third-layer belt member 34 are connected in series. Also, the W-phase input portion 128 (3inW) of the third layer and the W-phase output portion 130 (2outW) of the second layer are arranged at the same position in the circumferential direction. Also, the W-phase input portion 128 (3inW) of the third layer and the W-phase output portion 130 (2outW) of the second layer are connected to each other. As a result, the plurality of W-phase coil portions 16W formed on the second-layer belt member 34 and the plurality of W-phase coil portions 16W formed on the third-layer belt member 34 are connected in series.

[0206] The fourth-layer belt member 34 is disposed offset by an angle α [deg] toward one side in the circumferential direction relative to the second-layer belt member 34. In this state, the U-phase output section 130 (3outU) of the third layer and the U-phase output section 130 (4outU) of the fourth layer are disposed at the same position in the circumferential direction. The U-phase output section 130 (3outU) of the third layer and the U-phase output section 130 (4outU) of the fourth layer are connected to each other. The V-phase output section 130 (3outV) of the third layer and the V-phase output section 130 (4outV) of the fourth layer are disposed at the same position in the circumferential direction. The V-phase output section 130 (3outV) of the third layer and the V-phase output section 130 (4outV) of the fourth layer are connected to each other. The W-phase output section 130 (3outW) of the third layer and the W-phase output section 130 (4outW) of the fourth layer are disposed at the same position in the circumferential direction. Furthermore, the W-phase output section 130 (3outW) in the third layer and the W-phase output section 130 (4outW) in the fourth layer are connected to each other.

[0207] Here, the second-layer belt member 34 and the third-layer belt member 34 are each provided with three bypass conductors 132U, 132V, and 132W. The U-phase output section 130 (1outU) of the first layer and the U-phase input section 128 (4inU) of the fourth layer are connected via the bypass conductor 132U provided on the second-layer belt member 34 and the bypass conductor 132W provided on the third-layer belt member 34. As a result, the multiple U-phase coil sections 16U formed on the first-layer belt member 34 and the multiple U-phase coil sections 16U formed on the fourth-layer belt member 34 are connected in series. Furthermore, the V-phase output section 130 (1outV) of the first layer and the V-phase input section 128 (4inV) of the fourth layer are connected via the bypass conductor 132V provided on the second-layer belt member 34 and the bypass conductor 132W provided on the third-layer belt member 34. As a result, the plurality of V-phase coil portions 16V formed on the first-layer belt member 34 and the plurality of V-phase coil portions 16V formed on the fourth-layer belt member 34 are connected in series. Also, the W-phase output portion 130 (1outW) of the first layer and the W-phase input portion 128 (4inW) of the fourth layer are connected via the bypass conductor portion 132W provided on the second-layer belt member 34 and the bypass conductor portion 132W provided on the third-layer belt member 34. As a result, the plurality of W-phase coil portions 16W formed on the first-layer belt member 34 and the plurality of W-phase coil portions 16W formed on the fourth-layer belt member 34 are connected in series.

[0208] 62, the plurality of U-phase coil portions 16U formed on the first layer of band member 34 are represented by reference symbol U1, the plurality of U-phase coil portions 16U formed on the second layer of band member 34 are represented by reference symbol U2, the plurality of U-phase coil portions 16U formed on the third layer of band member 34 are represented by reference symbol U3, and the plurality of U-phase coil portions 16U formed on the fourth layer of band member 34 are represented by reference symbol U4. As shown in this figure, in the coil body 32 of this embodiment, the plurality of U-phase coil portions 16U formed on the first layer of band member 34 and the plurality of U-phase coil portions 16U formed on the fourth layer of band member 34 can be connected in parallel with the plurality of U-phase coil portions 16U formed on the second layer of band member 34 and the plurality of U-phase coil portions 16U formed on the third layer of band member 34. Although not shown, in the coil body 32 of this embodiment, the plurality of V-phase coil portions 16V formed on the first-layer belt member 34 and the plurality of V-phase coil portions 16V formed on the fourth-layer belt member 34 can be connected in parallel to the plurality of V-phase coil portions 16V formed on the second-layer belt member 34 and the plurality of V-phase coil portions 16V formed on the third-layer belt member 34. Also, in the coil body 32 of this embodiment, the plurality of W-phase coil portions 16W formed on the first-layer belt member 34 and the plurality of W-phase coil portions 16W formed on the fourth-layer belt member 34 can be connected in parallel to the plurality of W-phase coil portions 16W formed on the second-layer belt member 34 and the plurality of W-phase coil portions 16W formed on the third-layer belt member 34.

[0209] As described above, in the coil body 32 of this embodiment, multiple coil portions 16 formed on one band member 34 can be connected in parallel with multiple coil portions 16 formed on another band member 34.

[0210] (Twenty-second embodiment) Next, a motor according to a 22nd embodiment will be described. In the motor according to the 22nd embodiment, components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0211] 63 and 64, in the motor of this embodiment, the portions corresponding to the coil portion 16 (see FIG. 7, etc.) described above are made up of first coil piece portions 134 and second coil piece portions 136. Note that the portions of the first coil piece portions 134 and the second coil piece portions 136 corresponding to the coil portion 16 described above will be given the same reference numerals as the portions corresponding to the coil portion 16.

[0212] The first coil piece portions 134 are formed on one surface 34A of the band member 34 (see FIG. 53, etc.). The first coil piece portions 134 include a first straight portion A1 that slopes toward the other axial side as it extends toward one circumferential side, and a second straight portion A2 that extends from an end of the first straight portion A1 on the one circumferential side toward the other axial side. The first coil piece portions 134 also include a third straight portion A3 that slopes toward the other axial side as it extends toward the one circumferential side from an end of the second straight portion A2 opposite the first straight portion A1. An end portion of the first coil piece portions 134 on the one axial side is a first end portion 134A located on one axial side of the band member 34. An end portion of the first coil piece portions 134 on the other axial side is a second end portion 134B located on the other axial side of the band member 34.

[0213] The second coil piece portions 136 are formed on the other surface 34B (see FIG. 53, etc.) of the band member 34. The second coil piece portions 136 include a fourth straight portion A4 that slopes toward one axial side as it extends toward one circumferential side, and a fifth straight portion A5 that extends toward one axial side from an end of the fourth straight portion A4 on one circumferential side. The second coil piece portions 136 also include a sixth straight portion A6 that slopes toward one axial side as it extends toward one circumferential side from an end of the fifth straight portion A5 opposite the fourth straight portion A4. The end on the other axial side of the second coil piece portions 136 is a third end portion 136A located on the other axial side of the band member 34. The end on one axial side of the second coil piece portions 136 is a fourth end portion 136B located on one axial side of the band member 34.

[0214] 65 shows some of the first coil piece portions 134 and the second coil piece portions 136 of the plurality of first coil piece portions 134 and the plurality of second coil piece portions 136 that constitute the U phase. As shown in this figure, in the coil body 32 of the motor of this embodiment, the plurality of first coil piece portions 134 and the plurality of second coil piece portions 136 are arranged alternately along the circumferential direction of the band member 34. A first end portion 134A of the first coil piece portion 134 and a fourth end portion 136B of the second coil piece portion 136 that are adjacent on one axial side of the band member 34 are electrically connected on one axial side of the band member 34 via a via, a through hole, or the like (not shown). Furthermore, a second end portion 134B of the first coil piece portion 134 and a third end portion 136A of the second coil piece portion 136 that are adjacent on the other axial side of the band member 34 are electrically connected on the other axial side of the band member 34 via a via, a through hole, or the like (not shown). As a result, the plurality of first coil piece portions 134 and the plurality of second coil piece portions 136 are connected in a predetermined connection state to form the U-phase coil group 42U.

[0215] Figure 66 shows the U-phase coil group 42U formed on the band member 34 (see Figure 65). Although not shown, the V-phase coil group 42V and the W-phase coil group 42W formed on the band member 34 (see Figure 65) also have the same configuration as the U-phase coil group 42U. As shown in Figure 66, in this embodiment, the connection positions of the second end portion 134B of the first coil piece portion 134 and the third end portion 136A of the second coil piece portion 136 are the same in the axial direction.

[0216] In this embodiment, some of the first ends 134A of the multiple first coil piece portions 134 arranged on one axial side of the band member 34 and some of the fourth ends 136B of the multiple second coil piece portions 136 are offset by a distance F to one axial side from the other first ends 134A and other fourth ends 136B. More specifically, the first ends 134A of the first coil piece portions 134 connected to the input portion 128, the output portion 130, etc. and the first ends 134A circumferentially adjacent to this first end 134A, as well as the fourth ends 136B of the second coil piece portions 136 connected to the input portion 128, the output portion 130, etc. and the fourth ends 136B circumferentially adjacent to this fourth end 136B are offset by a distance F to one axial side from the other first ends 134A and other fourth ends 136B. This makes it easier to connect some of the first end portions 134A and fourth end portions 136B to the input portion 128, output portion 130, and the like.

[0217] (Twenty-third embodiment) Next, a motor according to a 23rd embodiment will be described. In the motor according to the 22nd embodiment, the components and parts corresponding to those of the motor 10 of the first embodiment already described will be denoted by the same reference numerals as those of the motor 10 of the first embodiment, and their description may be omitted.

[0218] FIG. 67 shows the first coil piece portion 134 and the second coil piece portion 136 that constitute part of the coil body 32 of the motor of this embodiment. As shown in this figure, in this embodiment, slits 60 are formed in the first coil piece portion 134 and the second coil piece portion 136. As a result, in this embodiment, eddy currents are suppressed compared to a configuration in which the slits 60 are not formed, and the torque of the motor can be further improved. Note that the reference numeral 138 in FIG. 67 denotes a via, through hole, or the like that connects the first end portion 134A and the third end portion 136A. As shown in this figure, the connection position between the first end portion 134A and the third end portion 136A on the other axial side of the slit 60 may be set within the range indicated by the arrow 140, for example.

[0219] The configurations of the first coil piece portion 134 and the second coil piece portion 136 of the 22nd and 23rd embodiments described above correspond to the configurations of the coil portion 16 of the 1st to 21st embodiments, and the respective parts of the two can be combined or substituted.

[0220] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above and can be implemented in various other modified forms without departing from the spirit of the present disclosure. Furthermore, all or part of the configurations of the embodiments described above can be combined with each other.

[0221] For example, the configuration may be selected appropriately depending on the application of the motor 10, etc. The configuration of the motor 10, etc. may also be applied to a generator. The configuration of the motor 10, etc. may also be applied to an outer rotor type brushless motor in which the rotor 12 is disposed radially outside the stator 14. The configuration of the present disclosure may also be applied to a rotor configured to include a coil body 32.

[0222] <Additional Notes> (Appendix 1) a band member (34) formed using an insulating material, and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and wound multiple times in the circumferential direction and stacked in the radial direction; a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) configured to include a plurality of coil sections (16) each formed on the band member using a conductive material and arranged in a line along the longitudinal direction of the band member, wherein the shape of each of the plurality of coil sections as viewed from the thickness direction of the band member is formed such that one side in the lateral direction of the band member is open and the other side in the lateral direction is closed, and ends of the coil sections adjacent in the longitudinal direction of the band member are connected to each other on one side in the lateral direction of the band member, so that the plurality of coil sections are connected in a predetermined connection state; A coil body (32) comprising: (Appendix 2) a band member (34) formed using an insulating material and shaped like a band with its axial direction as its short side, its circumferential direction as its long side, and its radial direction as its thickness direction, and which is wound in the circumferential direction and laminated in the radial direction; The coil winding includes a plurality of first coil piece portions (134) and a plurality of second coil piece portions (136) that are each formed on the band member using a conductive material and that are arranged in an alternating state along the longitudinal direction of the band member, and the plurality of first coil piece portions are each formed into a shape that extends from one side to the other side in the lateral direction of the band member when viewed from the thickness direction of the band member, and the plurality of second coil piece portions are each formed into a shape that extends from the other side to one side in the lateral direction of the band member when viewed from the thickness direction of the band member. a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) in which an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on one side of the band member in the short direction are connected on one side of the band member in the short direction, and an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on the other side of the band member in the short direction are connected on the other side of the band member in the short direction, thereby connecting the plurality of first coil piece portions and the plurality of second coil piece portions in a predetermined connection state; A coil body (32) comprising: (Appendix 3) The coil group includes a plurality of phases, 3. A coil body according to claim 1, wherein the coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions of the coil group of the same phase are stacked in the radial direction. (Appendix 4) The plurality of coil portions include a pair of vertical portions (36) spaced apart in the longitudinal direction of the band member; a connecting portion (38B) that connects the pair of vertical portions on the other side of the belt member in the short direction; a pair of coil ends (38A) extending from the pair of vertical portions toward one side in the lateral direction of the band member, the distance between the ends increasing in the longitudinal direction of the band member as the ends approach the one side in the lateral direction of the band member; The invention comprises: A coil body described in Appendix 1 or Appendix 3 which cites Appendix 1, in which the coil end of one of the coil sections adjacent in the longitudinal direction of the band member is connected to the coil end of another of the coil sections. (Appendix 5) Inter-coil connection portions (74) are provided at one end and the other end of the belt member in the longitudinal direction, A coil body according to any one of Supplementary Notes 1 to 4, in which the coil portions or the first coil piece portions and the second coil piece portions are connected in a predetermined connection state, with the end portion on one longitudinal side of the band member and the end portion on the other longitudinal side overlapping in the radial direction and the coil-to-coil connection portion formed at the end portion on one longitudinal side of the band member being connected to the coil-to-coil connection portion formed at the end portion on the other longitudinal side of the band member. (Appendix 6) 6. The coil body according to claim 5, wherein the inter-coil connection portion includes an extending end portion (74A) extending toward one side in the lateral direction beyond an end on one side in the lateral direction of the band member. (Appendix 7) The belt member includes a plurality of the belt members, A coil body as described in Appendix 5 or Appendix 6, in which the coil connection portion of one of the band members is connected to the coil connection portion of another of the band members, and the plurality of coil portions formed on one of the band members is connected to the plurality of coil portions formed on the other of the band members, or the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members is connected to the plurality of first coil piece portions and the plurality of second coil piece portions formed on the other of the band members. (Appendix 8) a plurality of bypass connection portions (80, 82, 84) are provided that connect the coil portion or the first coil piece portion and the second coil piece portion of one layer to the coil portion or the first coil piece portion and the second coil piece portion of another layer; 8. The coil body according to claim 1, wherein the plurality of bypass connection portions are stacked in a radial direction. (Appendix 9) 10. The coil body according to any one of claims 1 to 9, wherein at least a part of the coil portion or the first coil piece portion and the second coil piece portion is divided in the longitudinal direction of the band member. (Appendix 10) 10. The coil body described in Appendix 9, wherein the number of divisions of the coil portion or the first coil piece portion and the second coil piece portion arranged radially outward is greater than the number of divisions of the coil portion or the first coil piece portion and the second coil piece portion arranged radially inward. (Appendix 11) A closed circuit (66) having a plurality of paths is formed in the single coil portion or the plurality of coil portions, or a closed circuit (66) having a plurality of paths is formed in the single first coil piece portion and the second coil piece portion or the plurality of first coil piece portions and the second coil piece portion, a first connection portion (62) that forms part of the closed circuit and connects the plurality of paths; a second connection portion (64) that forms another part of the closed circuit and connects the paths together so that currents flowing in the closed circuit due to electromagnetic induction caused by circumferential movement of the magnet (18) are canceled out within the closed circuit; and 12. The coil body according to claim 1, further comprising: (Appendix 12) A plurality of the belt members wound in a circular shape in the circumferential direction are stacked in the radial direction, the plurality of coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions formed on the band member are connected in a predetermined connection state between an input portion (128) and an output portion (130); A coil body according to any one of Supplementary Note 1 to Supplementary Note 11, wherein the output section connected to the plurality of coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members and the input section connected to the plurality of coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions formed on another band member radially adjacent to the one of the band members are connected at the same circumferential position. (Appendix 13) A coil body as described in Appendix 12, in which the pattern of the plurality of coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members matches the pattern of the plurality of coil portions or the plurality of first coil piece portions and the plurality of second coil piece portions formed on another of the band members. (Appendix 14) A coil body as described in Appendix 12 or Appendix 13, in which a plurality of the coil portions or a plurality of the first coil piece portions and a plurality of the second coil piece portions formed on one of the band members and a plurality of the coil portions or a plurality of the first coil piece portions and a plurality of the second coil piece portions formed on another of the band members are connected in parallel. (Appendix 15) the first coil piece portion is formed on one surface of the band member, the second coil piece portion is formed on the other surface of the band member, A coil body according to any one of Appendix 2 or Appendix 3 to Appendix 14 which cites Appendix 2, wherein some of the ends of the plurality of first coil piece portions and some of the ends of the plurality of second coil piece portions arranged on one side of the band member in the short direction are offset to one side of the band member in the short direction relative to other ends of the plurality of first coil piece portions and other ends of the plurality of second coil piece portions arranged on one side of the band member in the short direction. (Appendix 16) A coil body according to any one of Appendix 2 and Appendix 3 to Appendix 15 which cites Appendix 2, wherein at least one of the first coil piece portion and the second coil piece portion has a portion which slopes in the short direction of the band member as it moves toward one side of the longitudinal direction of the band member. (Appendix 17) An armature (14) configured to include the coil body described in Supplementary Notes 1 to 16. (Appendix 18) One of a stator (14) and a rotor (12) configured to include the armature described in Appendix 17; the other of the stator and the rotor having a magnet disposed radially opposite the coil body; A rotating electric machine (10, 118, 120, 122, 124) equipped with the above. [Explanation of symbols]

[0223] 10 motor (rotating electric machine), 12 rotor (rotor), 14 stator (armature, stator), 16 coil portion, 18 magnet, 32 coil body, 34 band member, 36 vertical portion, 38B connection portion, 38A coil end, 42U coil group, 42V coil group, 42W coil group, 42UV coil group, 42VW coil group, 42WU coil group, 62 first connection portion, 64 second connection portion, 66 closed circuit, 74 inter-coil connection portion, 74A extension end portion, 80 bypass connection portion, 82 bypass connection portion, 84 bypass connection portion, 118 motor (rotating electric machine), 120 motor (rotating electric machine), 122 motor (rotating electric machine) 124, motor (rotating electric machine), 128 input portion, 130 output portion, 134 First coil piece portion, 134A first end portion (end portion of the first coil piece portion), 134B second end portion (end portion of the first coil piece portion), 136 second coil piece portion, 136A third end portion (end portion of the second coil piece portion), 136B fourth end portion (end portion of the second coil piece portion)

Claims

1. a band member (34) formed using an insulating material and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially in a state of being wound multiple times in the circumferential direction; a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) configured to include a plurality of coil sections (16) each formed on the band member using a conductive material and arranged in a line along the longitudinal direction of the band member, wherein the shape of each of the plurality of coil sections as viewed in the thickness direction of the band member is formed such that one side in the lateral direction of the band member is open and the other side in the lateral direction is closed, and the closed shape on the other lateral direction is formed by electrically connecting the one surface and the other surface of the band member, and ends of the coil sections adjacent in the longitudinal direction of the band member are connected to each other on the one side in the lateral direction of the band member, so that the plurality of coil sections are connected in a predetermined connection state; A coil body (32) comprising:

2. a band member (34) formed using an insulating material and shaped like a band with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially in a circumferentially wound state; The coil element includes a plurality of first coil piece portions (134) and a plurality of second coil piece portions (136) that are each formed on the band member using a conductive material and that are arranged in an alternating state along the longitudinal direction of the band member, wherein the plurality of first coil piece portions are each formed in a shape that extends from one side to the other side in the lateral direction of the band member when viewed in the thickness direction of the band member, and the plurality of second coil piece portions are each formed in a shape that extends from the other side to one side in the lateral direction of the band member when viewed in the thickness direction of the band member, and the first coil piece portion and the second coil piece portion are each formed in a shape that extends from the other side to the other side in the lateral direction of the band member when viewed in the thickness direction of the band member. a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) in which the first coil piece portions and the second coil piece portions are electrically connected across one surface and the other surface of the band member at the same side, and an end of the first coil piece portion and an end of the second coil piece portion that are adjacent on one side of the band member in the short direction are connected on one side of the band member in the short direction, and an end of the first coil piece portion and an end of the second coil piece portion that are adjacent on the other side of the band member in the short direction are connected on the other side of the band member in the short direction, thereby connecting the plurality of first coil piece portions and the plurality of second coil piece portions in a predetermined connection state; A coil body (32) comprising:

3. The coil group includes a plurality of phases, The coil body according to claim 1 , wherein the coil portions of the coil groups of the same phase are stacked in a radial direction.

4. A coil generator including a plurality of phase coil groups, The coil body according to claim 2 , wherein the plurality of first coil piece portions and the plurality of second coil piece portions of the coil group of the same phase are stacked in the radial direction.

5. The plurality of coil portions are a pair of vertical portions (36) spaced apart in the longitudinal direction of the band member; a connecting portion (38B) that connects the pair of vertical portions on the other side of the band member in the short direction; a pair of coil ends (38A) extending from the pair of vertical portions toward one side in the lateral direction of the band member, the distance between the ends increasing in the longitudinal direction of the band member as the ends approach the one side in the lateral direction of the band member; The invention comprises:

2. The coil body according to claim 1, wherein the coil end of one of the coil portions adjacent to each other in the longitudinal direction of the band member is connected to the coil end of the other of the coil portions.

6. An inter-coil connection portion (74) is provided at each of the longitudinal end portion and the other longitudinal end portion of the belt member, A coil body as described in claim 1, wherein the plurality of coil sections are connected in a predetermined connection state, with the end portion on one side of the longitudinal direction of the band member and the end portion on the other side being radially overlapped, and the coil-to-coil connection portion formed at the end portion on one side of the longitudinal direction of the band member being connected to the coil-to-coil connection portion formed at the end portion on the other side of the longitudinal direction of the band member.

7. An inter-coil connection portion (74) is provided at each of the longitudinal end portion and the other longitudinal end portion of the belt member, 3. The coil body according to claim 2, wherein the first coil piece portions and the second coil piece portions are connected in a predetermined connection state with the end portions on one side of the longitudinal direction of the band member overlapping the end portions on the other side of the longitudinal direction of the band member radially and the inter-coil connection portion formed on the end portion on one side of the longitudinal direction of the band member connected to the inter-coil connection portion formed on the end portion on the other side of the longitudinal direction of the band member.

8. A coil body as described in claim 6 or claim 7, wherein the inter-coil connection portion has an extending end portion (74A) extending toward one side in the short direction beyond the end on one side of the short direction of the band member.

9. A device comprising a plurality of the belt members, A coil body as described in claim 6, wherein the coil-to-coil connection portion of one of the band members is connected to the coil-to-coil connection portion of another of the band members, and a plurality of the coil portions formed on one of the band members is connected to a plurality of the coil portions formed on another of the band members.

10. A device comprising a plurality of the belt members, 8. The coil body according to claim 7, wherein the coil-to-coil connection portion of one of the band members is connected to the coil-to-coil connection portion of another of the band members, and the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members are connected to the plurality of first coil piece portions and the plurality of second coil piece portions formed on the other of the band members.

11. A plurality of bypass connection parts (80, 82, 84) are provided to connect the coil part of one layer with the coil part of another layer, The coil body according to claim 1 , wherein the plurality of bypass connection portions are stacked in the radial direction.

12. A plurality of bypass connection portions (80, 82, 84) are provided to connect the first coil piece portion and the second coil piece portion of one layer with the first coil piece portion and the second coil piece portion of another layer, The coil body according to claim 2 , wherein the plurality of bypass connection portions are stacked in the radial direction.

13. A coil body as described in claim 1, wherein at least a portion of the coil portion is divided in the longitudinal direction of the band member.

14. A coil body as described in claim 2, wherein at least a portion of the first coil piece portion and the second coil piece portion are divided in the longitudinal direction of the band member.

15. A band member (34) formed using an insulating material and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially in a state of being wound around the circumferential direction multiple times; a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) configured to include a plurality of coil sections (16) each formed on the band member using a conductive material and arranged in a line along the longitudinal direction of the band member, wherein the shape of each of the plurality of coil sections as viewed from the thickness direction of the band member is formed such that one side in the lateral direction of the band member is open and the other side in the lateral direction is closed, and ends of the coil sections adjacent in the longitudinal direction of the band member are connected to each other on one side in the lateral direction of the band member, so that the plurality of coil sections are connected in a predetermined connection state; Equipped with At least a part of the coil portion is divided in the longitudinal direction of the band member, A coil body in which the number of divisions of the coil portion arranged radially outward is greater than the number of divisions of the coil portion arranged radially inward.

16. A band member (34) formed using an insulating material and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially while being wound circumferentially; The coil coil assembly is configured to include a plurality of first coil piece portions (134) and a plurality of second coil piece portions (136) that are each formed on the band member using a conductive material and that are arranged in an alternating state along the longitudinal direction of the band member, wherein the plurality of first coil piece portions are each formed in a shape that extends from one side to the other side in the lateral direction of the band member when viewed from the thickness direction of the band member, and the plurality of second coil piece portions are each formed in a shape that extends from the other side to one side in the lateral direction of the band member when viewed from the thickness direction of the band member. a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) in which an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on one side of the band member in the short direction are connected on one side of the band member in the short direction, and an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on the other side of the band member in the short direction are connected on the other side of the band member in the short direction, thereby connecting the plurality of first coil piece portions and the plurality of second coil piece portions in a predetermined connection state; Equipped with At least a part of the first coil piece portion and the second coil piece portion is divided in the longitudinal direction of the band member, A coil body in which the number of divisions of the first coil piece portion and the second coil piece portion arranged radially outward is greater than the number of divisions of the first coil piece portion and the second coil piece portion arranged radially inward.

17. A closed circuit (66) having multiple paths is formed in the single coil portion or multiple coil portions, a first connection portion (62) that forms part of the closed circuit and connects the plurality of paths; a second connection portion (64) that forms another part of the closed circuit and connects the paths together so that currents flowing in the closed circuit due to electromagnetic induction caused by circumferential movement of the magnet (18) are canceled out within the closed circuit; and The coil body according to claim 1 , comprising:

18. A closed circuit (66) having a plurality of paths is formed in the single first coil piece portion and the second coil piece portion or in the plurality of first coil piece portions and the second coil piece portions, a first connection portion (62) that forms part of the closed circuit and connects the plurality of paths; a second connection portion (64) that forms another part of the closed circuit and connects the paths together so that currents flowing in the closed circuit due to electromagnetic induction caused by circumferential movement of the magnet (18) are canceled out within the closed circuit; and The coil body according to claim 2 , comprising:

19. A plurality of the band members wound in a circular shape in the circumferential direction are stacked in the radial direction, The plurality of coil portions formed on the band member are connected in a predetermined connection state between an input portion (128) and an output portion (130), A coil body as described in claim 1, wherein the output portion connected to a plurality of the coil portions formed on one of the band members and the input portion connected to a plurality of the coil portions formed on another band member radially adjacent to the one of the band members are connected at the same circumferential position.

20. A plurality of the belt members wound in a ring shape in the circumferential direction are stacked in the radial direction, the plurality of first coil piece portions and the plurality of second coil piece portions formed on the band member are connected in a predetermined connection state between an input portion (128) and an output portion (130); 3. The coil body according to claim 2, wherein the output portion connected to the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members and the input portion connected to the plurality of first coil piece portions and the plurality of second coil piece portions formed on another band member radially adjacent to the one of the band members are connected at the same circumferential position.

21. A coil body as described in Claim 19, in which the pattern of the multiple coil portions formed on one of the band members is consistent with the pattern of the multiple coil portions formed on another of the band members.

22. A coil body as described in Claim 20, in which the pattern of the plurality of first coil piece portions and the plurality of second coil piece portions formed on one of the band members matches the pattern of the plurality of first coil piece portions and the plurality of second coil piece portions formed on another of the band members.

23. A coil body as described in Claim 19, in which a plurality of the coil portions formed on one of the band members and a plurality of the coil portions formed on another of the band members are connected in parallel.

24. A coil body as described in Claim 20, in which a plurality of the first coil piece portions and a plurality of the second coil piece portions formed on one of the band members are connected in parallel with a plurality of the first coil piece portions and a plurality of the second coil piece portions formed on another of the band members.

25. The first coil piece portion is formed on one side surface of the band member, the second coil piece portion is formed on the other surface of the band member, A coil body as described in claim 2, wherein some of the ends of the multiple first coil piece portions and some of the ends of the multiple second coil piece portions arranged on one side of the short side of the band member are offset to one side of the short side of the band member relative to the other ends of the multiple first coil piece portions and the other ends of the multiple second coil piece portions arranged on one side of the short side of the band member.

26. A band member (34) formed using an insulating material and formed in a band shape with the axial direction as the short side direction, the circumferential direction as the long side direction, and the radial direction as the thickness direction, and stacked radially while being wound circumferentially; The coil coil assembly is configured to include a plurality of first coil piece portions (134) and a plurality of second coil piece portions (136) that are each formed on the band member using a conductive material and that are arranged in an alternating state along the longitudinal direction of the band member, wherein the plurality of first coil piece portions are each formed in a shape that extends from one side to the other side in the lateral direction of the band member when viewed from the thickness direction of the band member, and the plurality of second coil piece portions are each formed in a shape that extends from the other side to one side in the lateral direction of the band member when viewed from the thickness direction of the band member. a coil group (42U, 42V, 42W, or 42UV, 42VW, 42WU) in which an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on one side of the band member in the short direction are connected on one side of the band member in the short direction, and an end of the first coil piece portion and an end of the second coil piece portion adjacent to each other on the other side of the band member in the short direction are connected on the other side of the band member in the short direction, thereby connecting the plurality of first coil piece portions and the plurality of second coil piece portions in a predetermined connection state; Equipped with At least one of the first coil piece portion and the second coil piece portion has a portion that inclines toward the short side of the band member as it extends toward one side of the longitudinal direction of the band member.

27. ​​An armature (14) comprising a coil body as described in claim 1 or claim 2.

28. One of a stator (14) and a rotor (12) configured to include the armature according to claim 27; the other of the stator and the rotor having a magnet disposed radially opposite the coil body; A rotating electric machine (10, 118, 120, 122, 124) comprising:

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