Coil body, armature, and rotating electrical machine

Abstract

The coil body (32) includes a plurality of substrates (34) stacked in the axial direction, and a plurality of conductor layers (33) formed on each of the plurality of substrates (34) using a conductive material. The coil body (32) further includes a first series connection portion (50S1) that connects the first conductor layer (33) formed on the first substrate (34) and the first conductor layer (33) formed on the second substrate (34) in series. The coil body (32) further includes a second series connection portion (50S2) that connects the second conductor layer (33) formed on the first substrate (34) and the second conductor layer (33) formed on the second substrate (34) in series. The coil body (32) further includes a parallel connection portion (52) that connects the conductor layers (33) connected by the first series connection portion (50S1) and the conductor layers (33) connected by the second series connection portion (50S2) in parallel.

Description

[0001] Mutual citation of related applications

[0002] This application is based on Japanese Patent Application No. 2023-130444, filed on August 9, 2023, the contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to a coil body, an armature, and a rotating electric machine. Background Technology

[0004] Patent Document 1 discloses a coil for a rotary motor, such as an electric motor. The coil described in this document has multiple coil plate elements formed in a circular plate shape, on which a predetermined wiring pattern is formed. Furthermore, these coil plate elements are separated from each other at their intermediate portions and joined at their inner and outer circumferences to form a coil plate with a predetermined coil winding pattern.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2008-061357 Summary of the Invention

[0008] In recent years, there has been a desire to achieve higher efficiency and higher torque in rotating electric motors, but the structure described in the aforementioned patent document 1 still has room for improvement in this regard.

[0009] The purpose of this disclosure is to provide a coil body, armature, and rotary motor that can achieve high efficiency and high torque in a structure in which the base components are stacked axially.

[0010] In a first aspect of this disclosure, the coil body includes: a plurality of base members made of an insulating material and formed in a radially extending shape and stacked axially; a plurality of conductor layers made of a conductive material and respectively formed on the plurality of said base members; a first series connection portion that connects the first conductor layer formed on the first base member in series with the first conductor layer formed on the second base member in series; a second series connection portion that connects the second conductor layer formed on the first base member in series with the second conductor layer formed on the second base member in series; and a parallel connection portion that connects each conductor layer connected by the first series connection portion in parallel with each conductor layer connected by the second series connection portion.

[0011] Furthermore, the coil body includes: a plurality of base members made of an insulating material and formed in a radially extending shape and stacked axially; a plurality of conductor layers made of a conductive material and respectively formed on the plurality of base members; a first series connection portion that connects in series the plurality of conductor layers formed on the first base member and connected in parallel with each other to the plurality of conductor layers formed on the second base member and connected in parallel with each other; a second series connection portion that connects in series the plurality of conductor layers formed on the third base member and connected in parallel with each other to the plurality of conductor layers formed on the fourth base member and connected in parallel with each other; and a parallel connection portion that connects each conductor layer connected by the first series connection portion in parallel with each conductor layer connected by the second series connection portion in parallel.

[0012] In addition, the armature includes the aforementioned coil body.

[0013] Additionally, the rotary electric motor includes: one of a stator and a rotor configured to include the aforementioned armature; and the other of a stator and a rotor having a magnet arranged axially opposite to the coil body.

[0014] This configuration enables high efficiency and high torque in a structure where the base components are stacked axially. Attached Figure Description

[0015] The above-mentioned objects, other objects, features, and advantages of this disclosure will become clearer with reference to the accompanying drawings and the following detailed description. The drawings are described below.

[0016] Figure 1 It shows a three-dimensional view of the electric motor, with a portion of the motor shown in cross-section.

[0017] Figure 2 It shows an exploded perspective view of the electric motor, with some components shown in cross-section.

[0018] Figure 3 It is an exploded perspective view of the coil body, showing a portion of the coil body cut out.

[0019] Figure 4 This is a schematic top view of the coil body.

[0020] Figure 5 It refers to a diagram of a star-shaped wiring.

[0021] Figure 6 It is a schematic top view showing a substrate and coil portions formed on the substrate.

[0022] Figure 7It is a cross-sectional view showing a portion of a substrate of a specific layer in the coil portion of an electric motor and a cross-section of the coil portion formed on the substrate.

[0023] Figure 8 This is a cross-sectional view showing a portion of a substrate with multiple layers in the coil section of an electric motor, and the cross-section of the coil section formed on the substrate with multiple layers respectively.

[0024] Figure 9 This is a schematic cross-sectional view of the electric motor according to the first embodiment.

[0025] Figure 10 This is a schematic cross-sectional view of the coil body of the electric motor according to the first embodiment.

[0026] Figure 11 It is a block diagram showing the wiring status of each conductor layer.

[0027] Figure 12 It is a block diagram showing the wiring status of each conductor layer.

[0028] Figure 13 This is a schematic cross-sectional view of the electric motor according to the second embodiment.

[0029] Figure 14 This is a schematic cross-sectional view of the coil body of the electric motor according to the second embodiment.

[0030] Figure 15 It is a block diagram showing the wiring status of each conductor layer.

[0031] Figure 16A It is a block diagram showing the wiring status of each conductor layer.

[0032] Figure 16B It is a schematic cross-sectional view of the coil body of the electric motor.

[0033] Figure 17 This is a schematic cross-sectional view of the electric motor according to the third embodiment.

[0034] Figure 18 It is a block diagram showing the wiring status of each conductor layer.

[0035] Figure 19 It is a block diagram showing the wiring status of each conductor layer.

[0036] Figure 20 This is a schematic cross-sectional view of an electric motor with a substrate stacked in six layers.

[0037] Figure 21 It is a block diagram showing the wiring status of each conductor layer.

[0038] Figure 22It is a block diagram showing the wiring status of each conductor layer.

[0039] Figure 23 This is a schematic cross-sectional view of the electric motor according to the fourth embodiment.

[0040] Figure 24 This is a schematic cross-sectional view of the motor after the wiring state of each conductor layer of the motor in the fourth embodiment has been changed.

[0041] Figure 25 This is a perspective view schematically showing the coil body of the electric motor according to the fifth embodiment, and showing the state before the first substrate and the second substrate are stacked.

[0042] Figure 26 This is a schematic top view of the coil body of the electric motor according to the fifth embodiment, showing the state before the first substrate and the second substrate are stacked.

[0043] Figure 27 This is a schematic top view of the coil body of the electric motor according to the fifth embodiment, showing the state after the first substrate and the second substrate are stacked.

[0044] Figure 28 This is a perspective view schematically showing the coil body of the electric motor according to the sixth embodiment, and showing the state before the first substrate and the second substrate are stacked.

[0045] Figure 29 This is a perspective view schematically showing the coil body of the electric motor according to the sixth embodiment, and showing the state after the first substrate and the second substrate are stacked.

[0046] Figure 30 This is a schematic top view of the coil body of the electric motor according to the seventh embodiment, showing the state before the first substrate, second substrate, and third substrate are stacked.

[0047] Figure 31 This is a schematic top view of the coil body of the electric motor according to the seventh embodiment, showing the state after the first substrate and the second substrate are stacked.

[0048] Figure 32 This is a schematic top view of the coil body of the electric motor according to the seventh embodiment, showing the state after the first substrate, the second substrate and the third substrate are stacked.

[0049] Figure 33 This is a schematic perspective view of the coil body of the electric motor according to the eighth embodiment, showing the state before the first substrate, the second substrate and the third substrate are stacked.

[0050] Figure 34This is a schematic perspective view of the coil body of the electric motor according to the eighth embodiment, showing the state after the first substrate, the second substrate and the third substrate are stacked.

[0051] Figure 35 This is a schematic top view of the coil body of the electric motor according to the eighth embodiment, showing the state before the first substrate, the second substrate and the third substrate are stacked.

[0052] Figure 36 This is a schematic top view of the coil body of the electric motor according to the eighth embodiment, and shows the state during the lamination process of the first substrate, the second substrate and the third substrate.

[0053] Figure 37 This is a schematic top view of the coil body of the electric motor according to the eighth embodiment, showing the state after the first substrate, the second substrate and the third substrate are stacked.

[0054] Figure 38 This is a top view showing the coil body of the electric motor according to the ninth embodiment, and shows the state before the first substrate and the second substrate are stacked.

[0055] Figure 39 This is a top view showing the coil body of the electric motor according to the tenth embodiment, and shows the state before the first substrate and the second substrate are stacked.

[0056] Figure 40 This is a top view showing the coil body of the electric motor according to the eleventh embodiment, and shows the state before the first substrate and the second substrate are stacked.

[0057] Figure 41 This is a cross-sectional view showing a portion of a substrate with multiple layers in the coil section of the electric motor according to the eleventh embodiment, and a cross-section of the coil section formed on the substrate with multiple layers respectively.

[0058] Figure 42 This is a perspective view schematically showing the coil body of the electric motor according to the twelfth embodiment, and showing the state before the first substrate and the second substrate are stacked.

[0059] Figure 43 This is a schematic top view of the coil body of the electric motor according to the twelfth embodiment, showing the state after the first substrate and the second substrate are stacked.

[0060] Figure 44 This is a perspective view schematically showing the coil body of the electric motor according to the thirteenth embodiment, and showing the state before the first substrate and the second substrate are stacked.

[0061] Figure 45This is a schematic top view of the coil body of the electric motor according to the thirteenth embodiment, showing the state after the first substrate and the second substrate are stacked.

[0062] Figure 46 This is a top view schematically showing a first substrate or the like that constituting a part of the coil body of the electric motor according to the fourteenth embodiment.

[0063] Figure 47 This is a perspective view schematically showing the coil body of the electric motor according to the fourteenth embodiment, and showing the state after the first substrate and the second substrate are stacked.

[0064] Figure 48 This is a top view schematically showing a first substrate or the like that constituting a part of the coil body of the electric motor according to the fifteenth embodiment.

[0065] Figure 49 This is a perspective view schematically showing the coil body of the electric motor according to the fifteenth embodiment, and showing the state after the first substrate and the second substrate are stacked.

[0066] Figure 50 This is a perspective view schematically showing the coil body of the electric motor according to the sixteenth embodiment, and also showing the state after multiple substrates are stacked. Detailed Implementation

[0067] (Basic structure of an electric motor)

[0068] use Figures 1 to 8 The basic structure of the electric motor 10 according to the embodiments of this disclosure will be described. Furthermore, the arrows Z, R, and C, appropriately indicated in the figures, represent the axial side, radial side, and circumferential side of the rotor 12, respectively. Additionally, hereafter, unless otherwise specified, when only axial, radial, and circumferential directions are indicated, the axial, radial, and circumferential directions of the rotor 12 will be used. Furthermore, the electric motor 10 and the electric motors of the embodiments described later are examples of rotary electric motors.

[0069] like Figure 1 and Figure 2 As shown, the electric motor 10 is an axially spaced brushless motor in which the rotor 12, which is a rotating component, and the stator 14, which is an armature and a stationary component, are arranged axially opposite each other. Furthermore, Figure 1 and Figure 2 The diagram shown is an example of an electric motor 10, etc. The number of coil sections 16, the number of magnets 18, and the shapes of details are inconsistent in the following description.

[0070] The rotor 12 is configured to include: a rotating shaft 22, which is supported by a pair of bearings (not shown) to enable rotation; a rotor core 24, which is fixed to the rotating shaft 22; and a plurality of magnets 18, which are fixed to the axial surface of the rotor core 24. Additionally, a pair of bearings are respectively supported on a frame 21 and a frame end 23. A stator 14, etc., is housed between the frame 21 and the frame end 23.

[0071] The rotor core 24 includes: a first cylindrical portion 24A, which is formed in a cylindrical shape and has a rotating shaft 22 fixed thereon by pressing or the like; and a circular plate portion 24B, which extends radially outward from one end of the first cylindrical portion 24A along an axial direction. The circular plate portion 24B is formed in the shape of a circular plate with the axial direction as its thickness direction. A magnet 18, described later, is fixed to the other axial surface of the circular plate portion 24B.

[0072] Multiple magnets 18 are formed using magnetic compounds with an intrinsic coercivity Hc of 400 kA / m or higher and a residual magnetic flux density Br of 1.0 T or higher. As an example, magnet 18 uses NdFe2+. 11 TiN, Nd2Fe 14 B, Sm2Fe 17 Magnetic compounds such as N3 and FeNi are formed. Furthermore, multiple magnets 18 are fixed to the axially opposite surface of the circular plate portion 24B of the rotor core 24. Additionally, magnets 18 with N poles on the axially opposite surface and magnets 18 with S poles on the axially opposite surface are arranged alternately in the circumferential direction. The number of magnets 18 can be appropriately set according to the required output of the motor 10.

[0073] The stator 14 includes: a stator core 26 formed in a ring shape as an armature core; and a coil body 32 disposed along one axial side surface of the stator core 26. In this embodiment, the stator 14 has a poleless tooth structure, in which part of the stator core 26 is not disposed between the coil portions 16 that constitute part of the coil body 32.

[0074] The stator core 26 is formed using a soft magnetic material such as steel. The stator core 26 is formed as a plate with the thickness direction along the axial direction, and is formed as a ring when viewed from the axial direction. The stator core 26 is coaxially arranged with the rotor 12, and the radial center position of the stator core 26 coincides with the radial center position of the plurality of magnets 18 fixed to the rotor core 24 in the radial direction.

[0075] like Figure 3 As shown, the coil body 32 is configured to include: a plurality of substrates 34 formed in sheet form using an insulating material as a base member; and a plurality of coil portions 16 formed on the plurality of substrates 34 respectively.

[0076] The substrate 34 is formed as a plate with its thickness direction along the axial direction, and is formed as a ring when viewed from the axial direction. In addition, the substrate 34 can be a flexible substrate that can be bent along its thickness direction, or it can be a substrate that cannot be bent along its thickness direction. Moreover, in the coil body 32 of this embodiment, a plurality of substrates 34 are stacked along the axial direction.

[0077] like Figure 3 and Figure 4 As shown, multiple coil portions 16 are formed on multiple substrates 34. Furthermore, by stacking the multiple substrates 34 along the axial direction, the multiple coil portions 16 are arranged at predetermined positions in the circumferential and axial directions.

[0078] Here, as Figure 5 As shown, the multiple coil sections 16 constituting phase U (coil group 42U of phase U), the multiple coil sections 16 constituting phase V (coil group 42V of phase V), and the multiple coil sections 16 constituting phase W (coil group 42W of phase W) are connected by a star connection. That is, the end of coil group 42U of phase U that is opposite to the current input / output path, i.e., the input / output section 43, the end of coil group 42V of phase V that is opposite to the current input / output path, i.e., the input / output section 43, and the end of coil group 42W of phase W that is opposite to the current input / output path, i.e., the input / output section 43, are connected at the neutral point 44.

[0079] Figure 6 A first-layer substrate 34 and a plurality of coil portions 16 formed on the substrate 34 are shown. Here, 20 coil portions 16 constituting the U phase, 20 coil portions 16 constituting the V phase, and 20 coil portions 16 constituting the W phase are formed on the first-layer substrate 34. In the following description, the coil portions 16 constituting the U phase are sometimes referred to as coil portions 16U. The coil portions 16 constituting the V phase are sometimes referred to as coil portions 16V. The coil portions 16 constituting the W phase are sometimes referred to as coil portions 16W. In the following description, the 20 coil portions 16 constituting the U phase are sometimes referred to as coil portions 16U1 to 16U20. The 20 coil portions 16 constituting the V phase are sometimes referred to as coil portions 16V1 to 16V20. The 20 coil portions 16 constituting the W phase are sometimes referred to as coil portions 16W1 to 16W20.

[0080] Specifically, the coil portion 16U1 includes: a first extension A1 that slopes radially inward toward a circumferential side; and a second extension A2 that extends radially inward from the end of the first extension A1 on the circumferential side. Additionally, the coil portion 16U1 includes: a third extension A3 that slopes radially inward toward a circumferential side from the end of the second extension A2 on the opposite side to the first extension A1; and a fourth extension A4 that slopes radially outward from the end of the third extension A3 on the opposite side to the second extension A2. Furthermore, the coil portion 16U1 includes: a fifth extension A5 that extends radially outward from the end of the fourth extension A4 on the opposite side to the third extension A3; and a sixth extension A6 that slopes radially outward from the end of the fifth extension A5 on the opposite side to the fourth extension A4. Furthermore, in the following description, the first extension A1 to the sixth extension A6 are sometimes referred to as conductor portions 16B. In the coil body 32 of this structure, the conductor portions 16B are arranged regularly in the circumferential direction.

[0081] Here, the first extension A1, the second extension A2, and the third extension A3 are formed on one side surface 34A of the substrate 34 (the surface on the side of the stator core 26). Additionally, the fourth extension A4, the fifth extension A5, and the sixth extension A6 are formed on the other side surface 34B of the substrate 34 (the surface opposite to the stator core 26). As an example, the third extension A3 and the fourth extension A4 are electrically connected via vias or through-holes (not shown). Figure 6 In the diagram, the portion of the coil portion 16U1 formed on one side surface 34A of the substrate 34 is indicated by a solid line. The portion of the coil portion 16U1 formed on the other side surface 34B of the substrate 34 is indicated by a dashed line.

[0082] Furthermore, the second extension A2 and the fifth extension A5 described above are sometimes referred to as vertical portions 36. Additionally, the first extension A1 and the sixth extension A6 are sometimes referred to as one side of the coil end, i.e., the outer coil end 38A, and the third extension A3 and the fourth extension A4 are sometimes referred to as the other side of the coil end, i.e., the inner coil end 38B. Moreover, since a coil portion 16 has the first extension A1 to the sixth extension A6, the shape of a coil portion 16U1, viewed from the thickness direction of the substrate 34, is approximately a V-shape (U-shape) that is open radially outward and closed radially inward on the substrate 34.

[0083] The other coil sections 16U2 to 16U20 constituting phase U are also constructed in the same way as coil section 16U1. That is, all coil sections 16 constituting phase U have a substantially identical structure.

[0084] Coil section 16U2, connected to coil section 16U1, is disposed on the circumferential side relative to coil section 16U1. Similarly, coil section 16U3, connected to coil section 16U2, is disposed on the circumferential side relative to coil section 16U2. Furthermore, coil section 16U4, connected to coil section 16U3, is disposed on the circumferential side relative to coil section 16U3. Additionally, coil section 16U5, connected to coil section 16U4, is disposed on the circumferential side relative to coil section 16U4. Here, the sixth extension A6 of coil section 16U5 intersects with the first extension U1 of coil section 16U1 when viewed axially. Therefore, the end of coil section 16U5 connected to coil section 16U6 is located on the circumferential side relative to the end of coil section 16U1 on the input / output section 43 side.

[0085] Furthermore, coil section 16U6, connected to coil section 16U5, is disposed on one side of the circumferential direction relative to coil section 16U5, and is adjacent to coil section 16U1 in the circumferential direction. Additionally, coil section 16U7, connected to coil section 16U6, is disposed on one side of the circumferential direction relative to coil section 16U6, and is adjacent to coil section 16U2 in the circumferential direction. Additionally, coil section 16U8, connected to coil section 16U7, is disposed on one side of the circumferential direction relative to coil section 16U7, and is adjacent to coil section 16U3 in the circumferential direction. Additionally, coil section 16U9, connected to coil section 16U8, is disposed on one side of the circumferential direction relative to coil section 16U8, and is adjacent to coil section 16U4 in the circumferential direction. Additionally, coil section 16U10, connected to coil section 16U9, is disposed on one side of the circumferential direction relative to coil section 16U9, and is adjacent to coil section 16U5 in the circumferential direction. The end of coil section 16U10 opposite to coil section 16U9 is the neutral point 44.

[0086] Coil sections 16U11 to 16U20, which are connected in parallel with coil sections 16U1 to 16U10, are configured in the same manner as coil sections 16U1 to 16U10. Coil sections 16U11 to 16U20 are each offset 36° circumferentially from coil sections 16U1 to 16U10. Therefore, the vertical portions 36 of coil sections 16U11 to 16U20 and the vertical portions 36 of coil sections 16U1 to 16U10 are positioned at the same circumferential position. Here, the coil sections 16U1 to 16U10 connected in series are referred to as conductor layers 33. In this embodiment, two U-phase conductor layers 33U are provided on a substrate 34.

[0087] Furthermore, although detailed descriptions of the reference numerals in the accompanying drawings are omitted, the coil portions 16V1 to 16V20 constituting the V phase have the same structure as the coil portions 16U1 to 16U20 constituting the U phase. The coil portions 16V1 to 16V20 constituting the V phase are arranged 12° offset circumferentially from the coil portions 16U1 to 16U20 constituting the U phase. Here, the coil portions 16V1 to 16V10 connected in series are referred to as conductor layer 33. In this embodiment, two conductor layers 33V of the V phase are provided on a substrate 34. Additionally, the coil portions 16W1 to 16W20 constituting the W phase have the same structure as the coil portions 16U1 to 16U20 constituting the U phase. The coil portions 16W1 to 16W20 constituting the W phase are disposed 12° circumferentially offset from the coil portions 16V1 to 16V20 constituting the V phase. Here, the coil portions 16W1 to 16W10 connected in series are referred to as conductor layers 33. In this embodiment, two conductor layers 33W of the W phase are provided on a substrate 34.

[0088] The second-layer substrate 34, which overlaps with the first-layer substrate 34, and the plurality of coil portions 16 formed on the second-layer substrate 34 also have the same structure as the first-layer substrate 34 and the plurality of coil portions 16 formed on the first-layer substrate 34. In this embodiment, the pattern of the plurality of coil portions 16 formed on the first-layer substrate 34 is consistent with the pattern of the plurality of coil portions 16 formed on the second-layer substrate 34. The plurality of coil portions 16 formed on the second-layer substrate 34 are disposed offset by 6° to the other side in the circumferential direction relative to the plurality of coil portions 16 formed on the first-layer substrate 34. Moreover, by making the first-layer substrate 34 and the second-layer substrate 34 overlap axially, the plurality of coil portions 16 formed on the first-layer substrate 34 and the plurality of coil portions 16 formed on the second-layer substrate 34 are disposed at predetermined positions in the circumferential and axial directions.

[0089] Here, Figure 4 A diagram schematically illustrates the overlapping state of the first-layer substrate 34 and the second-layer substrate 34. In this diagram, solid lines represent portions of the coil portion 16 disposed between the first-layer substrate 34 and the second-layer substrate 34, while dashed lines represent other portions of the coil portion 16. As shown in the diagram, the portions of the coil portion 16 formed on the first-layer substrate 34 and the portions of the coil portion 16 formed on the second-layer substrate 34 are alternately arranged circumferentially and overlap circumferentially. Furthermore, a simpler diagram is used for this purpose. Figure 7 and Figure 8 This will be explained in detail later.

[0090] Furthermore, the third and fourth substrates 34 are also stacked in the same relationship as the first and second substrates 34. In a structure having five (three or more) substrates 34, they are also stacked in the same relationship as the first and second substrates 34. The number of coil bodies 32 (the number of substrates 34) can be appropriately set according to the output required by the motor 10, etc.

[0091] Figure 7 and Figure 8 The diagram shows a cross-section obtained by cutting a portion of the coil body 32 along both the axial and circumferential directions. Specifically, Figure 7 A portion of a substrate 34 with a specific layer and a cross-section of a coil portion 16 (conductor portion 16B) formed on the substrate 34 are shown. Additionally, Figure 8 A portion of a multi-layered substrate 34 and a cross-section of a coil portion 16 (conductor portion 16B) formed on the multi-layered substrate 34 are shown. Additionally, in Figure 7 and Figure 8 The shading of the cross-section is omitted. For example... Figure 7 and Figure 8 As shown, in this embodiment, when one substrate 34 and another substrate 34 are stacked axially, the conductor portions 16B formed on the first substrate 34 and the conductor portions 16B formed on the other substrate 34 are alternately arranged circumferentially. Furthermore, when one substrate 34 and another substrate 34 are stacked axially, the plurality of conductor portions 16B formed on the first substrate 34 and the plurality of conductor portions 16B formed on the other substrate 34 overlap circumferentially. Additionally, as... Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, in the state where one substrate 34 and another substrate 34 are stacked along the axial direction, the conductor portion 16B (vertical portion 36) of the coil portion 16 of the same phase is arranged along the axial direction.

[0092] Furthermore, in this embodiment, the circumferential width W1 of the conductor portion 16B formed on the substrate 34 of the first layer gradually decreases towards the substrate 34 of the second layer.

[0093] (Function and effect)

[0094] Next, the function and effects of the electric motor 10 in this embodiment will be explained.

[0095] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, in the electric 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 part of the stator 14. As a result, the rotor 12 rotates.

[0096] Here, the coil body 32 is configured to include a plurality of substrates 34 and a plurality of coil portions 16 respectively formed on the plurality of substrates 34. Furthermore, by stacking the plurality of substrates 34 axially, the plurality of coil portions 16 are arranged at predetermined positions in both the circumferential and axial directions. In this structure, compared to a coil structure having a winding wound around pole teeth, it is possible to suppress the enlargement of the coil body 32 in the axial direction. As a result, it is possible to suppress the enlargement of the motor 10.

[0097] (A structure used to suppress losses caused by circulating current)

[0098] Furthermore, the coil body 32, which constitutes part of the aforementioned motor 10, is a structure in which the substrate 34 of the above-described structure is stacked axially. In this structure, the distances between the plurality of coil portions 16 (conductor layers 33) formed on each layer of the substrate 34 and the magnet 18 are different from each other. Therefore, it can be considered that an induced voltage difference will be generated between the coil portions 16 (conductor layers 33) formed on one layer of the substrate 34 and the coil portions 16 (conductor layers 33) formed on other layers of the substrate 34, thereby generating a circulating current between them. Hereinafter, the structures of various embodiments including the series connection portion 50 and the parallel connection portion 52 for suppressing the losses caused by this circulating current will be described.

[0099] (First Implementation)

[0100] use Figures 9-11 The electric motor 54 of the first embodiment will be described. In addition, in the electric motor 54 of the first embodiment, the components and parts corresponding to the aforementioned electric motor 10 are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0101] like Figure 9 As shown, the coil body 32 of the motor 54 in this embodiment has a structure of two stacked substrates 34. Here, the substrate 34 disposed on the stator core 26 side is referred to as the first substrate 34S1, and the substrate 34 disposed on the magnet 18 side is referred to as the second substrate 34S2. Furthermore, Figure 9 The line indicated by the symbol T represents the magnetic flux of magnet 18.

[0102] Two conductor layers 33 are provided on the first substrate 34S1. Additionally, in Figure 9In the diagram, although a conductor layer 33 is drawn on one side of the first substrate 34S1 and a conductor layer 33 is drawn on the other side of the first substrate 34S1, these conductor layers 33 are formed along both sides of the substrate 34, just like the aforementioned motor 10. Furthermore, in Figure 9 In this diagram, only one of the U, V, and W phases, the conductor layer 33, is shown. Here, the conductor layer 33 formed along the first substrate 34S1 is referred to as the first conductor layer 33S1, and the other conductor layer 33 is referred to as the second conductor layer 33S2.

[0103] On the second substrate 34S2, two conductor layers 33 are also provided, similar to those on the first substrate 34S1. Here, one conductor layer 33 formed along the second substrate 34S2 is referred to as the third conductor layer 33S3, and the other conductor layer 33 is referred to as the fourth conductor layer 33S4.

[0104] like Figure 10 and Figure 11 As shown, the first conductor layer 33S1 formed on the first substrate 34S1 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series via the first series connection portion 50S1. Furthermore, the second conductor layer 33S2 formed on the first substrate 34S1 and the third conductor layer 33S3 formed on the second substrate 34S2 are connected in series via the second series connection portion 50S2. Additionally, the conductor layers 33S1 and 33S4 connected by the first series connection portion 50S1 and the conductor layers 33S2 and 33S3 connected by the second series connection portion 50S2 are connected in parallel via the parallel connection portion 52.

[0105] Furthermore, the first base member described in Appendix 1 at the end of this specification corresponds to the first substrate 34S1. Additionally, the first conductor layer formed on the first base member described in Appendix 1 corresponds to the first conductor layer 33S1. Furthermore, the second base member described in Appendix 1 corresponds to the second substrate 34S2. Furthermore, the first conductor layer formed on the second base member described in Appendix 1 corresponds to the fourth conductor layer 33S4. Furthermore, the first series connection portion described in Appendix 1 corresponds to the first series connection portion 50S1. Furthermore, the second conductor layer formed on the first base member described in Appendix 1 corresponds to the second substrate 34S2. Furthermore, the second conductor layer formed on the second base member described in Appendix 1 corresponds to the third substrate 34S3. Furthermore, the second series connection portion described in Appendix 1 corresponds to the second series connection portion 50S2. Furthermore, the parallel connection portion described in Appendix 1 corresponds to the parallel connection portion 52.

[0106] Here, the induced voltage generated by the first conductor layer 33S1 is set as V1, the induced voltage generated by the second conductor layer 33S2 is set as V2, the induced voltage generated by the third conductor layer 33S3 is set as V3, and the induced voltage generated by the fourth conductor layer 33S4 is set as V4. Then, in the motor 54 of this embodiment, the relationship between each induced voltage V1 to V4 is the relationship of Equation 1 below.

[0107] V4=V3≈V2=V1…Equation 1

[0108] That is, the fourth conductor layer 33S4, which is closest to the magnet 18, and the first conductor layer 33S1, which is closest to the magnet on the opposite side, are connected in series via the first series connection portion 50S1. The third conductor layer 33S3, which is disposed on the magnet 18 side, and the second conductor layer 33S2, which is disposed on the opposite side of the magnet 18, are connected in series via the second series connection portion 50S2. As a result, the induced voltage generated between the fourth conductor layer 33S4 and the first conductor layer 33S1 can be close to the induced voltage generated between the third conductor layer 33S3 and the second conductor layer 33S2. Then, the conductor layers 33S1 and 33S4 connected by the first series connection portion 50S1 and the conductor layers 33S2 and 33S3 connected by the second series connection portion 50S2 are connected in parallel via the parallel connection portion 52. This suppresses the losses caused by the circulating current between the fourth conductor layer 33S4 and the first conductor layer 33S1, and between the third conductor layer 33S3 and the second conductor layer 33S2. As a result, the motor 54 can achieve high efficiency and high torque. In addition, in the structure where the conductor layers 33S1, 33S2, 33S3, and 33S4 are simply connected in parallel, the relationship between the induced voltages V1 to V4 generated by each conductor layer 33S1, 33S2, 33S3, and 33S4 is as shown in Equation 1.1. Therefore, it is not possible to obtain the effect of suppressing the losses caused by the circulating current as in the motor 54 of this embodiment.

[0109] V4>V3>V2>V1… Equation 1.1

[0110] In addition, such as Figure 12 As shown, the first conductor layer 33S1 and the third conductor layer 33S3 are connected in series via the first series connection portion 50S1, and the second conductor layer 33S2 and the fourth conductor layer 33S4 are connected in series via the second series connection portion 50S2. The conductor layers 33S1 and 33S3 connected by the first series connection portion 50S1 and the conductor layers 33S2 and 33S4 connected by the second series connection portion 50S2 are connected in parallel via the parallel connection portion 52. In this structure, the losses caused by the circulating current circulating between the conductor layers 33 can be suppressed, just like the motor 54 in the first embodiment described above.

[0111] (Second Implementation)

[0112] use Figures 13-15 The electric motor 56 of the second embodiment will be described. In addition, in the electric motor 56 of the second embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of the first embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0113] like Figure 13 As shown, the coil body 32 of the motor 56 in this embodiment has a structure of three substrates 34 stacked together. Here, the three substrates 34 are referred to sequentially from the stator core 26 side to the magnet 18 side as the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3. Furthermore, one conductor layer 33 formed along the first substrate 34S1 is referred to as the first conductor layer 33S1, and the other conductor layer 33 is referred to as the second conductor layer 33S2. Additionally, one conductor layer 33 formed along the second substrate 34S2 is referred to as the third conductor layer 33S3, and the other conductor layer 33 is referred to as the fourth conductor layer 33S4. Furthermore, one conductor layer 33 formed along the third substrate 34S3 is referred to as the fifth conductor layer 33S5, and the other conductor layer 33 is referred to as the sixth conductor layer 33S6.

[0114] like Figure 14 and Figure 15 As shown, the first conductor layer 33S1 formed on the first substrate 34S1 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series via a first series connection portion 50S1. Furthermore, the second conductor layer 33S2 formed on the first substrate 34S1 and the third conductor layer 33S3 formed on the second substrate 34S2 are connected in series via a second series connection portion 50S2. Furthermore, the fourth conductor layer 33S4 formed on the second substrate 34S2 and the fifth conductor layer 33S5 formed on the third substrate 34S3 are connected in series via a third series connection portion 50S3. Furthermore, the third conductor layer 33S3 formed on the second substrate 34S2 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in series via a fourth series connection portion 50S4. Furthermore, the conductor layers 33S1, 33S4, and 33S5 connected by the first series connection portion 50S1 and the third series connection portion 50S3 are connected in parallel with the conductor layers 33S2, 33S3, and 33S6 connected by the second series connection portion 50S2 and the fourth series connection portion 50S4 via the parallel connection portion 52.

[0115] Furthermore, the first base member described in Appendix 1 and 3 at the end of this specification corresponds to the first substrate 34S1. The second base member described in Appendix 1 and 3 corresponds to the second substrate 34S3. The third base member described in Appendix 3 corresponds to the third substrate 34S2. The first conductor layer formed on the first base member described in Appendix 1 and 3 corresponds to the first conductor layer 33S1. The first conductor layer formed on the second base member described in Appendix 1 and 3 corresponds to the fifth conductor layer 33S5. The first series connection portion described in Appendix 1 and 3 corresponds to the first series connection portion 50S1 and the third series connection portion 50S3. The first conductor layer formed on the third base member described in Appendix 3 corresponds to the fourth conductor layer 33S4. The second conductor layer formed on the first base member described in Appendix 1 and 3 corresponds to the second conductor layer 33S2. The second conductor layer formed on the second base member described in Appendix 1 and 3 corresponds to the sixth conductor layer 33S6. Furthermore, the second series connection portion described in Appendices 1 and 3 corresponds to the second series connection portion 50S2 and the fourth series connection portion 50S4. Furthermore, the second conductor layer formed on the third base member described in Appendices 3 corresponds to the third conductor layer 33S3.

[0116] Here, the induced voltage generated by the first conductor layer 33S1 is set as V1, the induced voltage generated by the second conductor layer 33S2 is set as V2, the induced voltage generated by the third conductor layer 33S3 is set as V3, the induced voltage generated by the fourth conductor layer 33S4 is set as V4, the induced voltage generated by the fifth conductor layer 33S5 is set as V5, and the induced voltage generated by the sixth conductor layer 33S6 is set as V6. Then, in the motor 56 of this embodiment, the relationship between each induced voltage V1 to V6 is the relationship of Equation 2 below.

[0117] V6=V5≈V4=V3≈V2=V1…Equation 2

[0118] That is, the induced voltage generated between the conductor layers 33S1, 33S4, and 33S5 connected by the first series connection portion 50S1 and the third series connection portion 50S3 is close to the induced voltage generated between the conductor layers 33S2, 33S3, and 33S6 connected by the second series connection portion 50S2 and the fourth series connection portion 50S4. Moreover, the conductor layers 33S1, 33S4, and 33S5 connected by the first series connection portion 50S1 and the third series connection portion 50S3 and the conductor layers 33S2, 33S3, and 33S6 connected by the second series connection portion 50S2 and the fourth series connection portion 50S4 are connected in parallel via the parallel connection portion 52. This suppresses the losses caused by the circulating current circulating between the conductor layers 33S1, 33S4, and 33S5 and the conductor layers 33S2, 33S3, and 33S6, resulting in high efficiency and high torque of the motor 56.

[0119] In addition, such as Figure 16A As shown, the first conductor layer 33S1 and the third conductor layer 33S3 are connected in series via the first series connection portion 50S1, the second conductor layer 33S2 and the fourth conductor layer 33S4 are connected in series via the second series connection portion 50S2, the third conductor layer 33S3 and the fifth conductor layer 33S5 are connected in series via the third series connection portion 50S3, and the fourth conductor layer 33S4 and the sixth conductor layer 33S6 are connected in series via the fourth series connection portion 50S4. Furthermore, the conductor layers 50S1, 50S3, and 50S5 connected by the first series connection portion 50S1 and the third series connection portion 50S3, and the conductor layers 50S2, 50S4, and 50S6 connected by the second series connection portion 50S2 and the fourth series connection portion 50S4 are connected in parallel via the parallel connection portion 52. In this structure, similar to the motor 56 of the second embodiment described above, losses caused by circulating current flowing between the conductor layers 33 can be suppressed.

[0120] Furthermore, the structure of the coil body 32 of the motor 56 in the second embodiment can be applied to coil bodies 32 in which multiple substrates 34 are stacked in an odd number of layers (three or more). For example, in a coil body 32 in which multiple substrates 34 are configured as five layers, the substrate 34 disposed closest to the stator core 26 corresponds to the first substrate 34S1 in the motor 56 of the second embodiment. The substrate 34 disposed closest to the magnet 18 corresponds to the third substrate 34S3 in the motor 56 of the second embodiment. Furthermore, the three substrates 34 disposed between the substrate 34 closest to the stator core 26 and the substrate 34 closest to the magnet 18 correspond to the second substrate 34S2 in the motor 56 of the second embodiment. Thus, the structure of the coil body 32 of the motor 56 of the second embodiment can be extended to apply to coil bodies 32 in which multiple substrates 34 are stacked in an odd number of layers (five or more).

[0121] Furthermore, the structure of the coil body 32 of the motor 56 in the second embodiment can be adapted to a coil body 32 in which multiple substrates 34 are stacked in an even number of layers (four or more). For example, as Figure 16BAs shown, in the coil body 32, which is composed of multiple substrates 34 forming a four-layer structure, the substrate 34 disposed closest to the stator core 26 corresponds to the first substrate 34S1 in the electric motor 56 of the second embodiment. The substrate 34 disposed closest to the magnet 18 corresponds to the third substrate 34S3 in the electric motor 56 of the second embodiment. Furthermore, the two substrates 34 disposed between the substrate 34 closest to the stator core 26 and the substrate 34 closest to the magnet 18 correspond to the second substrate 34S2 in the electric motor 56 of the second embodiment. Specifically, the coil body 32 has a structure of four substrates 34 stacked together. Here, the three substrates 34 from the stator core 26 side to the magnet 18 side are sequentially referred to as the first substrate 34S1, the second substrate 34S2, the third substrate 34S3, and the fourth substrate 34S4. Additionally, one conductor layer 33 formed along the first substrate 34S1 is referred to as the first conductor layer 33S1, and the other conductor layer 33 is referred to as the second conductor layer 33S2. Furthermore, one conductor layer 33 formed along the second substrate 34S2 is referred to as the third conductor layer 33S3, and the other conductor layer 33 is referred to as the fourth conductor layer 33S4. Additionally, one conductor layer 33 formed along the third substrate 34S3 is referred to as the fifth conductor layer 33S5, and the other conductor layer 33 is referred to as the sixth conductor layer 33S6. Furthermore, one conductor layer 33 formed along the fourth substrate 34S4 is referred to as the seventh conductor layer 33S7, and the other conductor layer 33 is referred to as the eighth conductor layer 33S8. The first conductor layer 33S1 formed on the first substrate 34S1 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series via a first series connection portion 50S1. Furthermore, the second conductor layer 33S2 formed on the first substrate 34S1 and the third conductor layer 33S3 formed on the second substrate 34S2 are connected in series via a second series connection portion 50S2. Furthermore, the fourth conductor layer 33S4 formed on the second substrate 34S2 and the fifth conductor layer 33S5 formed on the third substrate 34S3 are connected in series via the third series connection portion 50S3. Furthermore, the third conductor layer 33S3 formed on the second substrate 34S2 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in series via the fourth series connection portion 50S4. Furthermore, the fifth conductor layer 33S5 formed on the third substrate 34S3 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 are connected in series via the fifth series connection portion 50S5. Furthermore, the sixth conductor layer 33S6 formed on the third substrate 34S3 and the seventh conductor layer 33S7 formed on the fourth substrate 34S4 are connected in series via the sixth series connection portion 50S5.Furthermore, the conductor layers 33S1, 33S4, 33S5, and 33S8 connected by the first series connection portion 50S1, the third series connection portion 50S3, and the fifth series connection portion 50S3, and the conductor layers 33S2, 33S3, 33S6, and 33S7 connected by the second series connection portion 50S2, the fourth series connection portion 50S4, and the sixth series connection portion 50S6 are connected in parallel via the parallel connection portion 52. Thus, the structure of the coil body 32 of the motor 56 in the second embodiment can be extended to accommodate coil bodies 32 stacked in an even number of layers (four or more) on multiple substrates 34.

[0122] Furthermore, the first base member described in Appendix 1 and 3 at the end of this specification corresponds to the first substrate 34S1. Furthermore, the second base member described in Appendix 1 and 3 corresponds to the fourth substrate 34S4. Furthermore, the third base member described in Appendix 3 corresponds to the second substrate 34S2 and the third substrate 34S3. There are multiple third base members described in Appendix 3. Furthermore, the first conductor layer formed on the first base member described in Appendix 1 and 3 corresponds to the first conductor layer 33S1. Furthermore, the first conductor layer formed on the second base member described in Appendix 1 and 3 corresponds to the eighth conductor layer 33S8. Furthermore, the first series connection portion described in Appendix 1 and 3 corresponds to the first series connection portion 50S1, the third series connection portion 50S3, and the fifth series connection portion 50S5. Furthermore, the first conductor layer formed on the third base member described in Appendix 3 corresponds to the fourth conductor layer 33S4 and the fifth conductor layer 33S5. Furthermore, the second conductor layer formed on the first base member described in Appendix 1 and 3 corresponds to the second conductor layer 33S2. Furthermore, the second conductor layer formed on the second base member as described in Appendices 1 and 3 corresponds to the seventh conductor layer 33S7. Furthermore, the second series connection portion described in Appendices 1 and 3 corresponds to the second series connection portion 50S2, the fourth series connection portion 50S4, and the sixth series connection portion 50S6. Furthermore, the second conductor layer formed on the third base member as described in Appendices 3 corresponds to the third conductor layer 33S3 and the sixth conductor layer 33S6.

[0123] (Third implementation method)

[0124] use Figures 17-18 The electric motor 58 of the third embodiment will be described. In addition, in the electric motor 58 of the third embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0125] like Figure 17As shown, the coil body 32 of the motor 58 in this embodiment has a structure of four substrates 34 stacked together. Here, the four substrates 34 are referred to sequentially from the stator core 26 side to the magnet 18 side as the first substrate 34S1, the second substrate 34S2, the third substrate 34S3, and the fourth substrate 34S4. Furthermore, one conductor layer 33 formed along the first substrate 34S1 is referred to as the first conductor layer 33S1, and the other conductor layer 33 is referred to as the second conductor layer 33S2. Another conductor layer 33 formed along the second substrate 34S2 is referred to as the third conductor layer 33S3, and the other conductor layer 33 is referred to as the fourth conductor layer 33S4. A conductor layer 33 formed along the third substrate 34S3 is referred to as the fifth conductor layer 33S5, and the other conductor layer 33 is referred to as the sixth conductor layer 33S6. Finally, a conductor layer 33 formed along the fourth substrate 34S4 is referred to as the seventh conductor layer 33S7, and the other conductor layer 33 is referred to as the eighth conductor layer 33S8.

[0126] like Figure 17 and Figure 18 As shown, a first conductor layer 33S1 and a second conductor layer 33S2 formed on a first substrate 34S1 are connected in parallel. Furthermore, a third conductor layer 33S3 and a fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in parallel. Additionally, a fifth conductor layer 33S5 and a sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in parallel. Furthermore, a seventh conductor layer 33S7 and an eighth conductor layer 33S8 formed on the fourth substrate 34S4 are connected in parallel.

[0127] Furthermore, the first conductor layer 33S1 and the second conductor layer 33S2 formed on the first substrate 34S1 are connected in series with the seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 via the first series connection portion 50S1. Additionally, the third conductor layer 33S3 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series with the fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 via the second series connection portion 50S2. Moreover, the conductor layers 33S1, 33S2, 33S7, and 33S8 connected by the first series connection portion 50S1 are connected in parallel with the conductor layers 33S3, 33S4, 33S5, and 33S6 connected by the second series connection portion 50S2 via the parallel connection portion 52.

[0128] Furthermore, the first base member described in Appendix 2 at the end of this specification corresponds to the first substrate 34S1. Additionally, the plurality of conductor layers formed on the first base member and connected in parallel as described in Appendix 2 correspond to the first conductor layer 33S1 and the second conductor layer 33S2. Furthermore, the second base member described in Appendix 2 corresponds to the fourth substrate 34S4. Furthermore, the plurality of conductor layers formed on the second base member and connected in parallel as described in Appendix 2 correspond to the seventh conductor layer 33S7 and the eighth conductor layer 33S8. Furthermore, the first series connection portion described in Appendix 2 corresponds to the first series connection portion 50S1. Furthermore, the third base member described in Appendix 2 corresponds to the second substrate 34S2. Furthermore, the plurality of conductor layers formed on the third base member and connected in parallel as described in Appendix 2 correspond to the third conductor layer 33S3 and the fourth conductor layer 33S4. Furthermore, the fourth base member described in Appendix 2 corresponds to the third substrate 34S3. Furthermore, the multiple conductor layers formed on the fourth base member and connected in parallel as described in Appendix 2 correspond to the fifth conductor layer 33S5 and the sixth conductor layer 33S6. Furthermore, the second series connection portion described in Appendix 2 corresponds to the second series connection portion 50S2. Furthermore, the parallel connection portion described in Appendix 2 corresponds to the parallel connection portion 52.

[0129] Here, the induced voltage generated by the first conductor layer 33S1 is set as V1, the induced voltage generated by the second conductor layer 33S2 is set as V2, the induced voltage generated by the third conductor layer 33S3 is set as V3, the induced voltage generated by the fourth conductor layer 33S4 is set as V4, the induced voltage generated by the fifth conductor layer 33S5 is set as V5, the induced voltage generated by the sixth conductor layer 33S6 is set as V6, the induced voltage generated by the seventh conductor layer 33S7 is set as V7, and the induced voltage generated by the eighth conductor layer 33S8 is set as V8. Then, in the motor 58 of this embodiment, the relationship between each induced voltage V1 to V8 is the relationship of Equation 3 below.

[0130] V8=V7≈V6=V5≈V4=V3≈V2=V1…Equation 3

[0131] That is, the induced voltage generated between the conductor layers 33S1, 33S2, 33S7, and 33S8 connected by the first series connection portion 50S1 is close to the induced voltage generated between the conductor layers 33S3, 33S4, 33S5, and 33S6 connected by the second series connection portion 50S2. Moreover, the conductor layers 33S1, 33S2, 33S7, and 33S8 connected by the first series connection portion 50S1 and the conductor layers 33S3, 33S4, 33S5, and 33S6 connected by the second series connection portion 50S2 are connected in parallel via the parallel connection portion 52, thereby suppressing the losses caused by the circulating current circulating between the conductor layers 33S1, 33S2, 33S7, and 33S8 and the conductor layers 33S3, 33S4, 33S5, and 33S6. As a result, the motor 58 can achieve high efficiency and high torque.

[0132] In addition, such as Figure 19 As shown, the first conductor layer 33S1 and the fourth conductor layer 33S4 are connected in series via the first series connection portion 50S1, the second conductor layer 33S2 and the third conductor layer 33S3 are connected in series via the second series connection portion 50S2, the fourth conductor layer 33S4 and the fifth conductor layer 33S5 are connected in series via the third series connection portion 50S3, the third conductor layer 33S3 and the sixth conductor layer 33S6 are connected in series via the fourth series connection portion 50S4, the fifth conductor layer 33S5 and the eighth conductor layer 33S8 are connected in series via the fifth series connection portion 50S5, and the sixth conductor layer 33S6 and the seventh conductor layer 33S7 are connected in series via the sixth series connection portion 50S6. Furthermore, the conductor layers 33S1, 33S4, 33S5, and 33S8 connected by the first series connection portion 50S1, the third series connection portion 50S3, and the fifth series connection portion 50S5, and the conductor layers 33S2, 33S3, 33S6, and 33S7 connected by the second series connection portion 50S2, the fourth series connection portion 50S4, and the sixth series connection portion 50S6, are connected in parallel via the parallel connection portion 52. In this structure, similar to the motor 58 of the third embodiment described above, losses caused by circulating current circulating between the conductor layers 33 can be suppressed.

[0133] Furthermore, the structure of the coil body 32 of the motor 58 in the third embodiment can be applied to coil bodies 32 in which multiple substrates 34 are stacked in an even number of layers (four or more). For example, in a coil body 32 in which multiple substrates 34 are configured as six layers, the substrate 34 disposed closest to the stator core 26 corresponds to the first substrate 34S1 in the motor 58 of the third embodiment. Additionally, the substrate 34 disposed closest to the magnet 18 corresponds to the fourth substrate 34S4 in the motor 58 of the third embodiment. Furthermore, the four substrates 34 disposed between the substrate 34 disposed closest to the stator core 26 and the substrate 34 disposed closest to the magnet 18 correspond to the second substrate 34S2 and the third substrate 34S3 in the motor 58 of the third embodiment. Thus, the structure of the coil body 32 of the motor 58 of the third embodiment can be extended to apply to coil bodies 32 in which multiple substrates 34 are stacked in an even number of layers (six or more). Specifically, Figure 20 The coil body 32 shown is a structure consisting of six stacked substrates 34. Here, the six substrates 34, from the stator core 26 side to the magnet 18 side, are sequentially referred to as the first substrate 34S1, the second substrate 34S2, the third substrate 34S3, the fourth substrate 34S4, the fifth substrate 34S5, and the sixth substrate 34S6. Furthermore, one conductor layer 33 formed along the first substrate 34S1 is referred to as the first conductor layer 33S1, and the other conductor layer 33 is referred to as the second conductor layer 33S2. Similarly, one conductor layer 33 formed along the second substrate 34S2 is referred to as the third conductor layer 33S3, and the other conductor layer 33 is referred to as the fourth conductor layer 33S4. Furthermore, one conductor layer 33 formed along the third substrate 34S3 is referred to as the fifth conductor layer 33S5, and the other conductor layer 33 is referred to as the sixth conductor layer 33S6. Finally, one conductor layer 33 formed along the fourth substrate 34S4 is referred to as the seventh conductor layer 33S7, and the other conductor layer 33 is referred to as the eighth conductor layer 33S8. Furthermore, one conductor layer 33 formed along the fifth substrate 34S5 is referred to as the ninth conductor layer 33S9, and the other conductor layer 33 is referred to as the tenth conductor layer 33S10. Additionally, one conductor layer 33 formed along the sixth substrate 34S6 is referred to as the eleventh conductor layer 33S11, and the other conductor layer 33 is referred to as the twelfth conductor layer 33S12.

[0134] like Figure 21As shown, the first conductor layer 33S1 and the second conductor layer 33S2 formed on the first substrate 34S1 are connected in parallel. Furthermore, the third conductor layer 33S3 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in parallel. Furthermore, the fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in parallel. Furthermore, the seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 are connected in parallel. Furthermore, the ninth conductor layer 33S9 and the tenth conductor layer 33S10 formed on the fifth substrate 34S5 are connected in parallel. Furthermore, the eleventh conductor layer 33S11 and the twelfth conductor layer 33S12 formed on the sixth substrate 34S6 are connected in parallel.

[0135] Furthermore, the first conductor layer 33S1 and the second conductor layer 33S2 formed on the first substrate 34S1 are connected in series with the seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 via the first series connection portion 50S1. Additionally, the third conductor layer 33S3 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series with the ninth conductor layer 33S9 and the tenth conductor layer 33S10 formed on the fifth substrate 34S5 via the second series connection portion 50S2. Furthermore, the fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in series with the eleventh conductor layer 33S11 and the twelfth conductor layer 33S12 formed on the sixth substrate 34S6 via the third series connection portion 50S3. Furthermore, the conductor layers 33S1, 33S2, 33S7, and 33S8 connected by the first series connection portion 50S1, the conductor layers 33S3, 33S4, 33S9, and 33S10 connected by the second series connection portion 50S2, and the conductor layers 33S5, 33S6, 33S11, and 33S12 connected by the third series connection portion 50S3 are connected in parallel via the parallel connection portion 52. In this structure, similar to the motor 58 of the third embodiment described above, losses caused by circulating current flowing between the conductor layers 33 can be suppressed.

[0136] Additionally, in the coil body 32 stacked with six substrates 34, as Figure 22As shown, the first conductor layer 33S1 and the second conductor layer 33S2 formed on the first substrate 34S1 are connected in series with the fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 via the first series connection portion 50S1. The third conductor layer 33S3 and the fourth conductor layer 33S4 formed on the second substrate 34S2 are connected in series with the seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 via the second series connection portion 50S2. The fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in series with the ninth conductor layer 33S9 and the tenth conductor layer 33S10 formed on the fifth substrate 34S5 via the third series connection portion 50S3. The seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 are connected in series with the eleventh conductor layer 33S11 and the twelfth conductor layer 33S12 formed on the sixth substrate 34S6 via the fourth series connection portion 50S4. Furthermore, the conductor layers 33S1, 33S2, 33S5, 33S6, 33S9, and 33S10 connected by the first series connection portion 50S1 and the third series connection portion 50S3, and the conductor layers 33S3, 33S4, 33S7, 33S8, 33S11, and 33S12 connected by the second series connection portion 50S2 and the fourth series connection portion 50S4, are connected in parallel via the parallel connection portion 52. In this structure, similar to the motor 58 of the third embodiment described above, losses caused by circulating current flowing between the conductor layers 33 can be suppressed. Additionally, Figure 22 The described structure is based on the aforementioned third embodiment (refer to...). Figure 17 and Figure 18 The structure shown is applicable to the structure of coil body 32 in which multiple substrates 34 are stacked in a six-layer manner.

[0137] (Fourth Implementation)

[0138] use Figure 23 The electric motor 60 of the fourth embodiment will be described. In addition, in the electric motor 60 of the fourth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0139] like Figure 23As shown, the motor 60 of this embodiment is a motor with magnets 18 arranged on both sides of the coil body 32 in the axial direction (here referred to as a "biaxial type motor"). Furthermore, the coil body 32 of the motor 60 of this embodiment has a structure of four stacked substrates 34. The four substrates 34, from the magnet 18 side to the magnet 18 side on the other side, are sequentially referred to as the first substrate 34S1, the second substrate 34S2, the third substrate 34S3, and the fourth substrate 34S4. Additionally, the axial center position 70 of the four substrates 34 is the central portion of the second substrate 34S2 and the third substrate 34S3.

[0140] A first conductor layer 33S1 and a second conductor layer 33S2 formed on a first substrate 34S1 are connected in series with a fifth conductor layer 33S5 and a sixth conductor layer 33S6 formed on a third substrate 34S3 via a first series connection portion 50S1. Furthermore, a third conductor layer 33S3 and a fourth conductor layer 33S4 formed on a second substrate 34S2 are connected in series with a seventh conductor layer 33S7 and an eighth conductor layer 33S8 formed on a fourth substrate 34S4 via a second series connection portion 50S2. Therefore, the induced voltage generated between the conductor layers 33S1, 33S2, 33S5, and 33S6 connected by the first series connection portion 50S1 is close to the induced voltage generated between the conductor layers 33S3, 33S4, 33S7, and 33S8 connected by the second series connection portion 50S2. Furthermore, the conductor layers 33S1, 33S2, 33S5, and 33S6 connected by the first series connection portion 50S1 and the conductor layers 33S3, 33S4, 33S7, and 33S8 connected by the second series connection portion 50S2 are connected in parallel via the parallel connection portion 52. This suppresses losses caused by circulating currents between the conductor layers 33S1, 33S2, 33S5, and 33S6 and the conductor layers 33S3, 33S4, 33S7, and 33S8, resulting in high efficiency and high torque in the motor 60. Additionally, the structure of this embodiment is effective for biaxial motors.

[0141] In addition, such as Figure 24As shown, the first conductor layer 33S1 and the second conductor layer 33S2 formed on the first substrate 34S1 are connected in series with the third conductor layer 33S3 and the fourth conductor layer 33S4 formed on the second substrate 34S2 via the first series connection portion 50S1. The fifth conductor layer 33S5 and the sixth conductor layer 33S6 formed on the third substrate 34S3 are connected in series with the seventh conductor layer 33S7 and the eighth conductor layer 33S8 formed on the fourth substrate 34S4 via the second series connection portion 50S2. Furthermore, the conductor layers 33S1, 33S2, 33S3, and 33S4 connected by the first series connection portion 50S1 are connected in parallel with the conductor layers 33S5, 33S6, 33S7, and 33S8 connected by the second series connection portion 50S2 via the parallel connection portion 52. In this structure, similar to the motor 60 of the fourth embodiment described above, losses caused by circulating current flowing between the conductor layers 33 can be suppressed.

[0142] (Fifth implementation method)

[0143] use Figures 25-27 The electric motor of the fifth embodiment will be described below. Furthermore, in the electric motor of the fifth embodiment, components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are labeled with the same symbols as those corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0144] like Figures 25-27 As shown, in the coil body 32 of the electric motor in this embodiment, the first substrate 34S1 and the second substrate 34S2 are connected via an interlayer connection portion 64, which will be described in detail later. Specifically, the first substrate 34S1 and the second substrate 34S2 are formed by a planar member 66. In this planar member 66, conductor layers 33 are formed at portions corresponding to the first substrate 34S1 and the second substrate 34S2, respectively. Furthermore, in the planar member 66, at the portion connecting the first substrate 34S1 and the second substrate 34S2, a series connection portion 50 is formed, connecting the conductor layers 33 formed on the first substrate 34S1 and the conductor layers 33 formed on the second substrate 34S2 in series. Moreover, as... Figure 26 and Figure 27 As shown, the first substrate 34S1 and the second substrate 34S2 are stacked by folding the planar member 66 back to the folded position 68. In the structure of this embodiment, conductor layers 33 formed on the first substrate 34S1 and the second substrate 34S2 can be formed on a single planar member 66. Furthermore, in the structure of this embodiment, the additional step of connecting the conductor layers 33 formed on the first substrate 34S1 and the conductor layers 33 formed on the second substrate 34S2 via the series connection portion 50 can be omitted.

[0145] (Sixth Implementation Method)

[0146] use Figures 28-29 The electric motor of the sixth embodiment will be described. In addition, in the electric motor of the sixth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0147] like Figures 28-29 As shown, in the coil body 32 of the electric motor of this embodiment, similarly to the coil body 32 of the electric motor of the fifth embodiment, the first substrate 34S1 and the second substrate 34S2 are formed by a planar member 66. In this planar member 66, a first series connection portion 50S1 is formed in the portion connecting the first substrate 34S1 and the second substrate 34S2, connecting a first conductor layer 33S1 formed on the first substrate 34S1 and a fourth conductor layer 33S4 formed on the second substrate 34S2 in series; and a second series connection portion 50S2 is formed, connecting a second conductor layer 33S2 formed on the first substrate 34S1 and a third conductor layer 33S3 formed on the second substrate 34S2 in series. In the structure of this embodiment, conductor layers 33 formed on the first substrate 34S1 and the second substrate 34S2 can be formed on a planar member 66. Furthermore, in the structure of this embodiment, the following additional steps can be omitted: an additional step for connecting the first conductor layer 33S1 formed on the first substrate 34S1 and the fourth conductor layer 33S4 formed on the second substrate 34S2 via the first series connection portion 50S1; and an additional step for connecting the second conductor layer 33S2 formed on the first substrate 34S1 and the third conductor layer 33S3 formed on the second substrate 34S2 via the second series connection portion 50S2.

[0148] (Seventh Implementation)

[0149] use Figures 30-32 The electric motor of the seventh embodiment will be described. In addition, in the electric motor of the seventh embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0150] like Figures 30-32 As shown, in the coil body 32 of the electric motor in this embodiment, the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3 are connected via the interlayer connection portion 64, which will be described in detail later. Specifically, as... Figure 30As shown, the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3 are formed by a planar member 66. In this planar member 66, conductor layers 33 are formed at portions corresponding to the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3, respectively. Furthermore, in the planar member 66, at the portion connecting the first substrate 34S1 and the second substrate 34S2, a first series connection portion 50S1 is formed, connecting the conductor layer 33 formed on the first substrate 34S1 and the conductor layer 33 formed on the second substrate 34S2 in series. Additionally, in the planar member 66, at the portion connecting the second substrate 34S2 and the third substrate 34S3, a second series connection portion 50S2 is formed, connecting the conductor layer 33 formed on the second substrate 34S2 and the conductor layer 33 formed on the third substrate 34S3 in series. Moreover, as... Figure 30 and Figure 31 As shown, by folding the planar member 66 back to the first folded position 68S1, the first substrate 34S1 and the second substrate 34S2 are stacked. Additionally, as... Figure 31 and Figure 32 As shown, by folding the planar member 66 back to the second folding position 68S2, the second substrate 34S2 and the third substrate 34S3 are stacked, thereby stacking the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3. In the structure of this embodiment, conductor layers 33 formed on the first substrate 34S1, the second substrate 34S2, and the third substrate 34S3 can be formed on a planar member 66. In addition, in the structure of this embodiment, the following additional steps can be omitted: an additional step for connecting the conductor layer 33 formed on the first substrate 34S1 and the conductor layer 33 formed on the second substrate 34S2 via the first series connection portion 50S1; and an additional step for connecting the conductor layer 33 formed on the second substrate 34S2 and the conductor layer 33 formed on the third substrate 34S3 via the second series connection portion 50S2.

[0151] (Eighth Implementation)

[0152] use Figures 33-37 The electric motor of the eighth embodiment will be described. In addition, in the electric motor of the eighth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0153] like Figure 33 and Figure 34 As shown, in the coil body 32 of the electric motor in this embodiment, the first substrate 34S1 and the third substrate 34S3 are connected via the interlayer connection portion 64, which will be described in detail later. Specifically, as... Figure 30As shown, the first substrate 34S1 and the third substrate 34S3 are formed by a planar member 66. Conductor layers 33 are formed in the planar member 66 at portions corresponding to the first substrate 34S1 and the third substrate 34S3, respectively. Furthermore, in the planar member 66, a series connection portion 50 is formed at the portion connecting the first substrate 34S1 and the third substrate 34S3, connecting the conductor layers 33 formed on the first substrate 34S1 and the third substrate 34S3 in series. Moreover, as... Figures 34-36 As shown, the first substrate 34S1 and the third substrate 34S3 are stacked by folding the planar member 66 back to the folded position 68. Here, when the planar member 66 is folded back to the folded position 68, the second substrate 34S2 is disposed between the first substrate 34S1 and the third substrate 34S3. Thus, as... Figure 34 and Figure 37 As shown, a first substrate 34S1, a second substrate 34S2, and a third substrate 34S3 are stacked. In the structure of this embodiment, conductor layers 33 formed on the first substrate 34S1 and the third substrate 34S3 can be formed on a planar member 66. In addition, in the structure of this embodiment, the additional step of connecting the conductor layers 33 formed on the first substrate 34S1 and the third substrate 34S3 via the series connection portion 50 can be omitted.

[0154] (Ninth Implementation)

[0155] use Figure 38 The electric motor of the ninth embodiment will be described. In addition, in the electric motor of the ninth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0156] like Figure 38As shown, in the coil body 32 of the electric motor in this embodiment, the first substrate 34S1 and the second substrate 34S2 are connected via an interlayer connection portion 64. Furthermore, as an example, the first substrate 34S1 and the second substrate 34S2 of the coil body 32 of the electric motor in this embodiment correspond to the second substrate 34S2 and the third substrate 34S3 or the first substrate 34S1 and the fourth substrate 34S4 in the coil body 32 of the electric motor 58 described above. Specifically, the first substrate 34S1 and the second substrate 34S2 are formed by a planar member 66. In this planar member 66, a U-phase conductor layer 33U, a V-phase conductor layer 33V, and a W-phase conductor layer 33W are formed at portions corresponding to the first substrate 34S1 and the second substrate 34S2, respectively. Furthermore, in the planar component 66, an interlayer connection portion 64 connecting the first substrate 34S1 and the second substrate 34S2 is formed with a series connection portion 50U for connecting the U-phase conductor layer 33U formed on the first substrate 34S1 and the U-phase conductor layer 33U formed on the second substrate 34S2 in series. Additionally, an interlayer connection portion 64 is formed with a series connection portion 50V for connecting the V-phase conductor layer 33V formed on the first substrate 34S1 and the V-phase conductor layer 33V formed on the second substrate 34S2 in series. Furthermore, an interlayer connection portion 64 is formed with a series connection portion 50W for connecting the W-phase conductor layer 33W formed on the first substrate 34S1 and the W-phase conductor layer 33W formed on the second substrate 34S2 in series. Finally, an input / output portion 43 is formed in the interlayer connection portion 64, serving as an input path for current input to each conductor layer 33 or an output path for current output from the conductor layer 33. Furthermore, as an example, the series connection portion 50U of the U phase, the series connection portion 50V of the V phase, and the series connection portion 50W of the W phase correspond to the first series connection portion 50S1 or the second series connection portion 50S2 in the coil body 32 of the motor 58 of the aforementioned third embodiment. Moreover, by folding the planar member 66 back at the fold-back position 68 of the interlayer connection portion 64, the first substrate 34S1 and the second substrate 34S2 are stacked. In addition, in this embodiment, before the planar member 66 is folded back at the fold-back position 68 of the interlayer connection portion 64, the U phase conductor layer 33U, the V phase conductor layer 33V, and the W phase conductor layer 33W formed on the first substrate 34S1 are symmetrical with respect to the U phase conductor layer 33U, the V phase conductor layer 33V, and the W phase conductor layer 33W formed on the second substrate 34S2, separated by the fold-back position 68.

[0157] In the structure of this embodiment described above, the additional step of connecting the conductor layer 33 formed on the first substrate 34S1 and the conductor layer 33 formed on the second substrate 34S2 via the series connection portion 50 can be omitted. Furthermore, the positional accuracy of the first substrate 34S1 and the second substrate 34S2 can be ensured by providing an interlayer connection portion 64 connecting the first substrate 34S1 and the second substrate 34S2, and folding back at a predetermined folding position 68 of the interlayer connection portion 64. Alternatively, the aforementioned structure in which the parallel connection portion 52 is formed on the interlayer connection portion 64 can also be used.

[0158] (Tenth Implementation)

[0159] use Figure 39 The electric motor of the tenth embodiment will be described. In addition, in the electric motor of the tenth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0160] like Figure 39 As shown, the coil body 32 of the electric motor in this embodiment includes a first substrate 34S1 and a second substrate 34S2 connected via an interlayer connection portion 64. Furthermore, as an example, the first substrate 34S1 and the second substrate 34S2 of the coil body 32 of the electric motor in this embodiment are respectively equivalent to the first substrate 34S1 and the second substrate 34S2 in the coil body 32 of the electric motor 58 described above. In the structure of this embodiment, the additional step of connecting the conductor layer 33 formed on the first substrate 34S1 and the conductor layer 33 formed on the second substrate 34S2 via a series connection portion 50 can also be omitted.

[0161] (Eleventh Implementation Method)

[0162] use Figure 40 and Figure 41 The electric motor of the eleventh embodiment will be described. Furthermore, in the electric motor of the eleventh embodiment, components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are labeled with the same symbols as those corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0163] like Figure 40 As shown, the coil body 32 of the motor in this embodiment is similar to the coil body 32 of the motor in the ninth embodiment (see reference 32) except for the following points. Figure 38Similarly, in the coil body 32 of the electric motor of this embodiment, before the planar member 66 is folded back at the fold-back position 68 of the interlayer connection portion 64, the U-phase conductor layer 33U, V-phase conductor layer 33V, and W-phase conductor layer 33W formed on the first substrate 34S1 are configured with the same pattern as the U-phase conductor layer 33U, V-phase conductor layer 33V, and W-phase conductor layer 33W formed on the second substrate 34S2. Moreover, by folding the planar member 66 back at the fold-back position 68 of the interlayer connection portion 64, as... Figure 41 As shown, a first substrate 34S1 and a second substrate 34S2 are stacked. Furthermore, in the stacked state of the first substrate 34S1 and the second substrate 34S2, a plurality of conductor portions 16B formed on the first substrate 34 and a plurality of conductor portions 16B formed on the second substrate 34 are respectively disposed at the same circumferential position. Additionally, in the stacked state of the first substrate 34 and the second substrate 34, the plurality of conductor portions 16B formed on the first substrate 34 and a plurality of conductor portions 16B formed on the substrates 34 of other layers overlap axially.

[0164] In the structure of this embodiment described above, the additional step of connecting the conductor layer 33 formed on the first substrate 34S1 and the conductor layer 33 formed on the second substrate 34S2 via the series connection portion 50 can be omitted. In addition, by setting the U-phase conductor layer 33U, V-phase conductor layer 33V and W-phase conductor layer 33W formed on the first substrate 34S1 to the U-phase conductor layer 33U, V-phase conductor layer 33V and W-phase conductor layer 33W formed on the second substrate 34S2 with the same pattern, the increase in design time for the conductor layer 33 formed on each substrate 34 can be suppressed.

[0165] (Twelfth Implementation)

[0166] use Figure 42 and Figure 43 The electric motor of the twelfth embodiment will be described. In addition, in the electric motor of the twelfth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and sometimes their descriptions are omitted.

[0167] like Figure 42 and Figure 43As shown, in the coil body 32 of the electric motor in this embodiment, a first substrate 34S1 and a second substrate 34S2 are stacked. Here, a pair of input / output portions 43 formed on the first substrate 34S1 extend radially outward from the outer periphery of the first substrate 34S1 as input paths for current input to the conductor layer 33 or output paths for current output from the conductor layer 33. These two input / output portions 43 are spaced apart in the circumferential direction. Similarly, a pair of input / output portions 43 formed on the second substrate 34S2 extend radially outward from the outer periphery of the second substrate 34S2 as input paths for current input to the conductor layer 33 or output paths for current output from the conductor layer 33. These two input / output portions 43 are also spaced apart in the circumferential direction. Furthermore, the input / output portion 43 extending from the first substrate 34S1 (one circumferential side) and the input / output portion 43 extending from the second substrate 34S2 (the other circumferential side) are respectively positioned at the same circumferential position. Therefore, with the first substrate 34S1 and the second substrate 34S2 stacked, the input / output section 43 extending from the first substrate 34S1 (circumferential side) and the input / output section 43 extending from the second substrate 34S2 (other circumferential side) can be arranged close together. As a result, the connection operation between the input / output section 43 extending from the first substrate 34S1 (circumferential side) and the input / output section 43 extending from the second substrate 34S2 (other circumferential side) can be easily performed.

[0168] (Thirteenth Implementation Method)

[0169] use Figure 44 and Figure 45 The electric motor of the thirteenth embodiment will be described. Furthermore, in the electric motor of the thirteenth embodiment, components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are labeled with the same symbols as those corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0170] like Figure 44 and Figure 45 As shown, the coil body 32 of the electric motor in this embodiment is configured similarly to the coil body 32 of the electric motor in the twelfth embodiment, except that a pair of input / output portions 43 extend radially inward from the inner periphery of the first substrate 34S1 and the second substrate 34S2. In the coil body 32 of the electric motor in this embodiment, it is also possible to easily connect the input / output portion 43 extending from the first substrate 34S1 (one circumferential side) to the input / output portion 43 extending from the second substrate 34S2 (the other circumferential side).

[0171] (Fourteenth Implementation)

[0172] use Figure 46 and Figure 47The electric motor of the fourteenth embodiment will be described. In addition, in the electric motor of the fourteenth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0173] like Figure 46 and Figure 47 As shown, in the coil body 32 of the motor in this embodiment, a first substrate 34S1 and a second substrate 34S2 are stacked. Here, a pair of U-phase input / output portions 43U formed on the first substrate 34S1 extend radially outward from the outer periphery of the first substrate 34S1 as input paths for current input to the U-phase conductor layer 33U or output paths for current output from the U-phase conductor layer 33U. The pair of U-phase input / output portions 43U are spaced apart in the circumferential direction. As an example, the circumferential spacing θ of the pair of U-phase input / output portions 43U is set to (360° / number of slots × 2). Furthermore, a pair of V-phase input / output portions 43V formed on the first substrate 34S1 extend radially outward from the outer periphery of the first substrate 34S1 as input paths for current input to the V-phase conductor layer 33V or output paths for current output from the V-phase conductor layer 33V. The pair of V-phase input / output sections 43V are arranged circumferentially spaced relative to the pair of U-phase input / output sections 43U on one circumferential side. The circumferential spacing θ between the pair of V-phase input / output sections 43V is also set to (360° / number of slots × 2). Furthermore, the pair of W-phase input / output sections 43W formed on the first substrate 34S1 extends radially outward from the outer periphery of the first substrate 34S1 as either an input path for current input to the W-phase conductor layer 33W or an output path for current output from the W-phase conductor layer 33W. The pair of W-phase input / output sections 43W are arranged circumferentially spaced relative to the pair of V-phase input / output sections 43V. The circumferential spacing θ between the pair of W-phase input / output sections 43W is also set to (360° / number of slots × 2). Furthermore, the U-phase conductor layer 33U, V-phase conductor layer 33V, W-phase conductor layer 33W, a pair of U-phase input / output portions 43U, a pair of V-phase input / output portions 43V, and a pair of W-phase input / output portions 43W formed on the second substrate 34S2 have the same structure as the U-phase conductor layer 33U, V-phase conductor layer 33V, W-phase conductor layer 33W, a pair of U-phase input / output portions 43U, a pair of V-phase input / output portions 43V, and a pair of W-phase input / output portions 43 formed on the first substrate 34S1.

[0174] And, as Figure 47As shown, the first substrate 34S1 and the second substrate 34S2 are stacked at a position after the second substrate 34S2 is rotated θ° relative to the first substrate 34S1 in the circumferential direction. Consequently, the U-phase input / output portion 43U extending from the first substrate 34S1 and the U-phase input / output portion 43U extending from the second substrate 34S2 are positioned at the same circumferential position and are arranged close to each other. Similarly, the V-phase input / output portion 43V extending from the first substrate 34S1 and the V-phase input / output portion 43V extending from the second substrate 34S2 are positioned at the same circumferential position and are arranged close to each other. Furthermore, the W-phase input / output portion 43W extending from the first substrate 34S1 and the W-phase input / output portion 43W extending from the second substrate 34S2 are positioned at the same circumferential position and are arranged close to each other. Therefore, the following connection operations can be easily performed in the coil body 32 of the electric motor in this embodiment: connection operation of the U-phase input / output section 43U extending from the first substrate 34S1 and the U-phase input / output section 43U extending from the second substrate 34S2; connection operation of the V-phase input / output section 43V extending from the first substrate 34S1 and the V-phase input / output section 43V extending from the second substrate 34S2; and connection operation of the W-phase input / output section 43W extending from the first substrate 34S1 and the W-phase input / output section 43W extending from the second substrate 34S2.

[0175] (Fifteenth implementation method)

[0176] use Figure 48 and Figure 49 The electric motor of the fifteenth embodiment will be described. In addition, in the electric motor of the fifteenth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0177] like Figure 48 and Figure 49As shown, the coil body 32 of the motor in this embodiment is constructed in the same manner as the coil body 32 of the motor in the fourteenth embodiment, except that a pair of U-phase input / output portions 43U, a pair of V-phase input / output portions 43V, and a pair of W-phase input / output portions 43W extend radially inward from the inner periphery of the first substrate 34S1 and the second substrate 34S2. In the coil body 32 of the motor in this embodiment, the following connection operations can also be easily performed: connection operation of the U-phase input / output portion 43U extending from the first substrate 34S1 to the U-phase input / output portion 43U extending from the second substrate 34S2; connection operation of the V-phase input / output portion 43V extending from the first substrate 34S1 to the V-phase input / output portion 43V extending from the second substrate 34S2; and connection operation of the W-phase input / output portion 43W extending from the first substrate 34S1 to the W-phase input / output portion 43W extending from the second substrate 34S2.

[0178] (Sixteenth Implementation)

[0179] use Figure 50 The electric motor of the sixteenth embodiment will be described below. In addition, in the electric motor of the sixteenth embodiment, the components and parts corresponding to the aforementioned electric motor 10 or the electric motor 54 of each embodiment are marked with the same symbols as the components and parts corresponding to the aforementioned electric motor 10, and their descriptions are sometimes omitted.

[0180] like Figure 50 As shown, the coil body 32 of the motor in this embodiment is a structure in which the coil body 32 of the motor in the fourteenth embodiment and the coil body 32 of the motor in the fifteenth embodiment are stacked. Therefore, the following connection operations can be easily performed in the coil body 32 of the motor in this embodiment: connection operation of the U-phase input / output section 43U extending from the first substrate 34S1 and the U-phase input / output section 43U extending from the second substrate 34S2; connection operation of the V-phase input / output section 43V extending from the first substrate 34S1 and the V-phase input / output section 43V extending from the second substrate 34S2; and connection operation of the W-phase input / output section 43W extending from the first substrate 34S1 and the W-phase input / output section 43W extending from the second substrate 34S2.

[0181] The various embodiments of this disclosure have been described above, but this disclosure is not limited to the above. Various modifications can be made without departing from its spirit. Furthermore, all or part of the structures of the embodiments described above can be combined with each other. For example, the combination of structures of each embodiment can be appropriately selected according to the application of the electric motor 10, etc. Additionally, the structure of the electric motor 10, etc., can also be applied to a generator. Furthermore, the structure of this disclosure can also be applied to a rotor including the coil body 32. In the description of the various embodiments of this disclosure, the substrate 34, conductor layer 33, and series connection portion 50 are described with reference to numbers such as "first" and "second," but these numbers are provided for ease of explanation. Therefore, it is not implying that these numbers must be completely identical to those recorded in the claims.

[0182] <Postscript>

[0183] (Note 1)

[0184] A coil body (32) includes: a plurality of base members (34) which are made of an insulating material and are formed in a radially extending shape and are stacked in an axial direction; Multiple conductor layers (33) are made of conductive material and are respectively formed on multiple said base components; A first series connection (50) connects the first conductor layer formed on the first base member and the first conductor layer formed on the second base member in series. A second series connection portion connects the second conductor layer formed on the first base member in series with the second conductor layer formed on the second base member; and Parallel connection section (52) connects each of the conductor layers connected by the first series connection section in parallel with each of the conductor layers connected by the second series connection section.

[0185] (Note 2)

[0186] A coil body (32) includes: a plurality of base members (34) which are made of an insulating material and are formed in a radially extending shape and are stacked in an axial direction; Multiple conductor layers (33) are made of conductive material and are respectively formed on multiple said base components; The first series connection part (50) connects in series a plurality of conductor layers formed on the first base member and connected in parallel with each other and a plurality of conductor layers formed on the second base member and connected in parallel with each other; The second series connection portion connects in series the plurality of conductor layers formed in parallel on the third base member and the plurality of conductor layers formed in parallel on the fourth base member; and Parallel connection section (52) connects each of the conductor layers connected by the first series connection section in parallel with each of the conductor layers connected by the second series connection section.

[0187] (Note 3)

[0188] According to Appendix 1, a third base member is provided between the first base member and the second base member. The first conductor layer formed on the first base member and the first conductor layer formed on the second base member are connected via the first series connection portion and the first conductor layer formed on the third base member. The second conductor layer formed on the first base member is connected to the second conductor layer formed on the second base member via the second series connection portion and the second conductor layer formed on the third base member.

[0189] (Note 4)

[0190] According to Appendix 2, the first base member is disposed on one side of the axial center position (70) relative to the axial center position of the plurality of base members, and the third base member is disposed on the other side of the axial center position. The plurality of conductor layers formed on the first base member and the plurality of conductor layers formed on the third base member are connected via the first series connection portion. The second base member is disposed on one axial side relative to the center position, and the fourth base member is disposed on the other axial side relative to the center position. The plurality of conductor layers formed on the second base member and the plurality of conductor layers formed on the fourth base member are connected via the second series connection portion. Each conductor layer connected by the first series connection portion and each conductor layer connected by the second series connection portion are connected via the parallel connection portion.

[0191] (Note 5)

[0192] According to Appendix 2, the first base member is disposed on one axial side relative to the axial center position (70) of the plurality of base members, and the second base member is disposed on one axial side relative to the center position. The plurality of conductor layers formed on the first base member and the plurality of conductor layers formed on the second base member are connected via the first series connection portion. The third base member is disposed on the opposite side of the center position along the axial direction, and the fourth base member is disposed on the opposite side of the center position along the axial direction. The plurality of conductor layers formed on the third base member and the plurality of conductor layers formed on the fourth base member are connected via the second series connection portion. Each conductor layer connected by the first series connection portion and each conductor layer connected by the second series connection portion are connected via the parallel connection portion.

[0193] (Note 6)

[0194] According to any one of the appendices 1 to 5, the coil body includes an interlayer connection (64) connecting one of the base members to the other base members. At least one of the following is formed on the interlayer connection portion: the series connection portion connecting the conductor layer formed on one of the base members and the conductor layer formed on the other base members; the parallel connection portion connecting the conductor layer formed on one of the base members and the conductor layer formed on the other base members; and the input / output portion (43) serving as an input path for current to be input to the conductor layer or an output path for current to be output from the conductor layer.

[0195] (Note 7)

[0196] According to Appendix 6, in the coil body, with a portion of the interlayer connection bent, one of the base members connected via the interlayer connection is stacked axially with the other base members.

[0197] (Postscript 8)

[0198] According to any one of the appendices 1 to 7, the coil body is respectively provided at the same position in the circumferential direction as: an input / output section, which serves as an input path for current to be input into the conductor layer formed on one of the base members or an output path for current to be output from the conductor layer; and an input / output section (43), which serves as an input path for current to be input into the conductor layer formed on the other base members or an output path for current to be output from the conductor layer.

[0199] (Note 9)

[0200] According to Appendix 8, the base member extending radially outward from the input / output portion and the base member extending radially inward from the input / output portion are stacked axially.

[0201] (Postscript 10)

[0202] An armature (14) comprising a coil body as described in any one of Annex 1 to Annex 9.

[0203] (Postscript 11)

[0204] The armature according to Appendix 10 also includes an armature core (26) formed of a soft magnetic material. With no portion of the armature core disposed between the conductor layers formed on each of the base members, the armature core and the coil body are axially opposed.

[0205] (Postscript 12)

[0206] A rotary electric motor (10, 54, 56, 58, 60) includes: a stator (14) configured to include an armature as described in Appendix 10 or Appendix 11, and a rotor (12); and

[0207] The other of the stator and rotor having a magnet (18) that is axially opposite to the coil body.

[0208] While this disclosure has been described based on embodiments, it should be understood that this disclosure is not limited to the above-described embodiments and structures. This disclosure also includes various modifications and equivalent variations. In addition, various combinations and methods, and further combinations and methods that include only one element or more or less, also fall within the scope and concept of this disclosure.

Claims

1. A coil body (32), comprising: Multiple base components (34) are made of insulating material and are formed in a radially extending shape and are stacked axially; Multiple conductor layers (33) are made of conductive material and are respectively formed on multiple said base components; A first series connection (50) connects the first conductor layer formed on the first base member and the first conductor layer formed on the second base member in series. The second series connection portion connects the second conductor layer formed on the first base member in series with the second conductor layer formed on the second base member; as well as Parallel connection section (52) connects each of the conductor layers connected by the first series connection section in parallel with each of the conductor layers connected by the second series connection section.

2. A coil body (32), comprising: Multiple base components (34) are made of insulating material and are formed in a radially extending shape and are stacked axially; Multiple conductor layers (33) are made of conductive material and are respectively formed on multiple said base components; The first series connection part (50) connects in series a plurality of conductor layers formed on the first base member and connected in parallel with each other and a plurality of conductor layers formed on the second base member and connected in parallel with each other; The second series connection portion connects in series the plurality of conductor layers formed on the third base member and connected in parallel with each other to the plurality of conductor layers formed on the fourth base member and connected in parallel with each other; as well as Parallel connection section (52) connects each of the conductor layers connected by the first series connection section in parallel with each of the conductor layers connected by the second series connection section.

3. The coil body according to claim 1, characterized in that, A third base member is disposed between the first base member and the second base member. The first conductor layer formed on the first base member and the first conductor layer formed on the second base member are connected via the first series connection portion and the first conductor layer formed on the third base member. The second conductor layer formed on the first base member is connected to the second conductor layer formed on the second base member via the second series connection portion and the second conductor layer formed on the third base member.

4. The coil body according to claim 2, characterized in that, The first base member is disposed on one side of the axial center position (70) relative to the axial center position of the plurality of base members, and the third base member is disposed on the other side of the axial center position. The plurality of conductor layers formed on the first base member and the plurality of conductor layers formed on the third base member are connected via the first series connection portion. The second base member is disposed on one axial side relative to the center position, and the fourth base member is disposed on the other axial side relative to the center position. The plurality of conductor layers formed on the second base member and the plurality of conductor layers formed on the fourth base member are connected via the second series connection portion. Each conductor layer connected by the first series connection portion and each conductor layer connected by the second series connection portion are connected via the parallel connection portion.

5. The coil body according to claim 2, characterized in that, The first base member is disposed on one side of the axial center position (70) relative to the axial direction of the plurality of base members, and the second base member is disposed on one side of the axial direction relative to the center position. The plurality of conductor layers formed on the first base member and the plurality of conductor layers formed on the second base member are connected via the first series connection portion. The third base member is disposed on the opposite side of the center position along the axial direction, and the fourth base member is disposed on the opposite side of the center position along the axial direction. The plurality of conductor layers formed on the third base member and the plurality of conductor layers formed on the fourth base member are connected via the second series connection portion. Each conductor layer connected by the first series connection portion and each conductor layer connected by the second series connection portion are connected via the parallel connection portion.

6. The coil body according to claim 1, characterized in that, Includes an interlayer connection (64) that connects one of the base members to the other base members. At least one of the following is formed on the interlayer connection portion: the series connection portion connecting the conductor layer formed on one of the base members and the conductor layer formed on the other base members; the parallel connection portion connecting the conductor layer formed on one of the base members and the conductor layer formed on the other base members; and the input / output portion (43) serving as an input path for current to be input to the conductor layer or an output path for current to be output from the conductor layer.

7. The coil body according to claim 6, characterized in that, With a portion of the interlayer connection bent, one of the base members connected via the interlayer connection is stacked axially with the other base members.

8. The coil body according to claim 1, characterized in that, Input and output sections are respectively arranged at the same position in the circumferential direction, which serve as input paths for current to be input into the conductor layer formed on one of the base members or output paths for current to be output from the conductor layer. And an input / output section (43), which serves as an input path for current to be input into the conductor layer formed on the other base members or an output path for current to be output from the conductor layer.

9. The coil body according to claim 8, characterized in that, The base member extending radially outward from the input / output section and the base member extending radially inward from the input / output section are stacked axially.

10. An armature (14), The coil body includes any one of claims 1 to 9.

11. The armature according to claim 10, characterized in that, It also includes an armature core (26) made of soft magnetic material. With no portion of the armature core disposed between the conductor layers formed on each of the base members, the armature core and the coil body are axially opposed.

12. A rotary electric motor (10, 54, 56, 58, 60), comprising: It is configured to include one of the stator (14) and the rotor (12) of the armature as described in claim 10; as well as The other of the stator and rotor having a magnet (18) that is axially opposite to the coil body.

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