Rotating electric machine

Abstract

To provide a cylindrical coil arranged in a concentric circular shape with respect to a rotation axis of a rotary electric machine and made by winding a wire, the cylindrical coil being manufactured easily and being capable of inhibiting generation of cyclic current.SOLUTION: A cylindrical coil comprises a plurality of phases and arranged in a concentric circular shape with respect to an axial direction in which a rotation axis of a rotary electric machine extends and so as to surround the axial direction in a circumferential direction, which is a hoop direction with respect to the axial direction. The cylindrical coil is configured by a plurality of phase coils, each of which configures one of the plurality of phases and has a phase coil input end and a phase coil output end, being arranged so that with respect tp one phase coil, other phase coils are shifted in the circumferential direction, respectively. Each of the phase coils is configured by bundling a plurality of electrically conductive wires, each of which has a wire input end and a wire output end and extends from the wire input end positioned at the phase coil input end to the wire output end positioned at the phase coil output end. Each of the phase coils extends in the circumferential direction while repeating curvatures lifted or lowered in the axial direction in a wavy manner.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a hollow cylindrical coil used in motors and generators. [Background technology]

[0002] Various proposals have been made regarding hollow cylindrical coils used in motors, generators, and other applications.

[0003] For example, Patent Document 1 proposes a coil body formed by arranging two thin metal plates, each formed into a cylindrical body, with conductive strips patterned on them by etching a conductive plate-like body (e.g., a copper plate), and stacking the two cylindrical bodies concentrically as an inner and outer cylinder. Each cylinder has conductive strips with complementary patterns that form an electrical circuit when their ends are connected to each other. A layer of non-conductive stranded fiber is formed between each cylinder, and this layer insulates the conductive strips of the inner cylinder from those of the outer cylinder. The coil body is encased in a material that fills the conductive strips and the non-conductive stranded fiber, specifically polyimide.

[0004] Patent Document 2 proposes a coil body formed by folding a conductive sheet having multiple conductive strips and then shaping the folded conductive sheet into a cylindrical form.

[0005] Patent documents 3 and 4 by the present applicant propose a cylindrical coil made by winding wire, which is arranged concentrically with respect to the rotation axis of a rotating electric machine. This coil consists of a flat coil body, each formed by winding wire spirally multiple times around a winding axis extending radially perpendicular to the rotation axis, which is then arranged continuously in the circumferential direction of a cylindrical coil body to surround the rotation axis of the rotating electric machine. The wire is, for example, made by bundling multiple conductive wires, each with an enamel layer on its outer circumference, and then covering them with a fibrous material such as glass fiber.

[0006] Furthermore, although not a hollow cylindrical coil, Patent Document 5 proposes a coil that is wound around a core having multiple slots dispersed in the circumferential direction of a cylindrical core reference surface, and has multiple star connections, which suppresses the generation of circulating current while suppressing the increase in time and equipment costs for the coil winding process. Patent Document 6 proposes a motor winding structure that reduces eddy currents and circulating currents generated in the windings of a stator core. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Patent No. 3704044 [Patent Document 2] Japanese Patent Publication No. 2017-70140 [Patent Document 3] Patent No. 6948748 [Patent Document 4] International Public Publication WO2021 / 152662A1 [Patent Document 5] Patent No. 5858145 [Patent Document 6] Japanese Patent Publication No. 2008-136300 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The objective is to propose a cylindrical coil, formed by winding wire, that is easy to manufacture and can suppress the generation of circulating current, which is arranged concentrically with respect to the rotation axis of a rotating electric machine. [Means for solving the problem]

[0009] This is a cylindrical coil having multiple phases, arranged concentrically with respect to the axial direction of the rotating shaft of a rotating electric machine, and surrounding the axial direction in a circumferential direction relative to the axial direction.

[0010] The cylindrical coil is formed by a plurality of phase coils, each having a phase coil input terminal and a phase coil output terminal, which constitute each of the multiple phase coils, with each phase coil being offset in the circumferential direction from one of the phase coils.

[0011] Each wire has a wire input end and a wire output end, and multiple conductive wires extending from the wire input end located at the phase coil input end to the wire output end located at the phase coil output end are bundled together to form each phase coil.

[0012] The problem was solved by configuring each of the phase coils to extend in the circumferential direction while repeatedly curving up and down in the axial direction in a wave-like manner.

[0013] In the above, A forward axial portion of one phase coil that extends in the axial direction in the forward direction from the input terminal of the phase coil to the output terminal of the phase coil, The reverse axial portion of the phase coil that extends in the axial direction in the opposite direction from the output terminal of the phase coil to the input terminal of the phase coil, The phase coils can be configured to extend in the circumferential direction, intersecting each other in the radial direction perpendicular to the axial direction and overlapping each other.

[0014] As a result, In each of the multiple phase coils, the input terminal and the output terminal of the phase coil are located in close proximity. At the intersection where the forward axial portion and the reverse axial portion overlap each other, the positions of the forward axial portion and the reverse axial portion are swapped in the radial direction for each adjacent intersection in the circumferential direction. It can be structured.

[0015] In the above, The intersection between the forward axial portion and the reverse axial portion, where they overlap, occurs only between the forward axial portion and the reverse axial portion of each individual phase coil. The configuration can be such that the intersection between the forward axial portion and the reverse axial portion of one or more other phase coils occurs between the intersection points between the forward axial portion and the reverse axial portion of one phase coil that are adjacent in the circumferential direction.

[0016] For example, to accommodate multiple phases such as U-phase, V-phase, and W-phase, the number of coils used is set to, for example, three or more. Each of these coils is made by bundling multiple long wires together after insulating them, and then winding or meandering this bundled wire in the same pattern repeatedly from the input end to the output end to form a strip-shaped coil material. The problem is solved by preparing the same number of such strip-shaped coil materials as the number of phases used (for example, three phases: U-phase, V-phase, and W-phase), and forming a ring so that the input and output ends of the strip-shaped coil material for each phase are in close proximity in the circumferential direction. [Effects of the Invention]

[0017] According to this invention, it is possible to provide a cylindrical coil made by winding wire material, which is arranged concentrically with respect to the rotation axis of a rotating electric machine, that is easy to manufacture and can suppress the generation of circulating current. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view showing one embodiment in which the cylindrical coil according to this invention is a cylindrical coil with multiple phases: U-phase, V-phase, and W-phase. [Figure 2] Figure 1 is a plan view of the cylindrical coil shown, viewed from the axial direction from which the rotating shaft of the electric machine extends. [Figure 3] (a) is a side view of Figure 1, and (b) is a cross-sectional view of the section along line AA in Figure 2, with some parts omitted. [Figure 4]A plan view showing an example of a flat plate coil that is curved into a cylindrical shape to form the cylindrical coil shown in Figure 1. [Figure 5] (a) is an enlarged view of the left side of the flat coil shown in Figure 4, and (b) is an enlarged view of the right side of the flat coil shown in Figure 4. [Figure 6] Figure 1 shows an enlarged perspective view illustrating an example of the input and output ends of each phase coil, which are arranged in close proximity to each other in the cylindrical coil shown in the figure. [Figure 7] Figure 6 is a perspective view showing an enlarged view of the state of the wire input and output ends of the bundled wires at the input and output ends of the phase coil, respectively. [Figure 8] Figure 4 is a partially omitted perspective view showing an example of the arrangement of each phase coil in the rightmost portion of Figure 4, with a flat plate coil in the state shown. [Figure 9] This is a partially omitted perspective view illustrating an example in which each phase coil extends in the left-right direction perpendicular to the vertical direction, while repeating the wavy curvature in the vertical direction as shown in Figure 4, starting from the state shown in Figure 8. [Figure 10] This is a partially omitted perspective view illustrating an example in which each phase coil extends in the left-right direction perpendicular to the vertical direction, while repeatedly exhibiting the wavy curvature in the vertical direction shown in Figure 4, starting from the state shown in Figure 9. [Figure 11] A partially omitted perspective view showing an enlarged view of the leftmost portion of the planar coil shown in Figure 4. [Figure 12] This is a partially omitted plan view showing an example of the arrangement of each phase coil in the leftmost portion of Figure 4, when the vertical direction of the flat coil shown in Figure 4 corresponds to the direction in which the axis of rotation extends when the cylindrical coil shown in Figure 1 is formed from the flat coil shown in Figure 4. [Figure 13] Figure 1 is a perspective view showing a cylindrical yoke with magnets on its inner surface positioned radially outward of the cylindrical coil shown in Figure 1. [Figure 14] Figure 13 shows a side view of the state illustrated. [Modes for carrying out the invention]

[0019] The cylindrical coil 1 of this embodiment will be described with reference to Figures 1 to 12.

[0020] Figure 1 is a perspective view showing a cylindrical coil 1 according to one embodiment of the present invention. The cylindrical coil 1 shown in Figure 1 is arranged concentrically with respect to the axial direction of the rotation axis of the rotating electric machine shown by the dashed line 100 in Figure 1, and surrounds the axial direction 100 in the circumferential direction relative to the axial direction 100. The cylindrical coil 1 has multiple phases. In this embodiment, a cylindrical coil 1 consisting of three phases, U phase, V phase, and W phase, will be described.

[0021] The cylindrical coil 1 is composed of multiple phase coils, each of which constitutes one of the multiple phases, and each of these phase coils has a phase coil input terminal and a phase coil output terminal.

[0022] The cylindrical coil 1 of the three phases U-phase, V-phase, and W-phase according to this embodiment is composed of a U-phase coil 2, a V-phase coil 3, and a W-phase coil 4. The U-phase coil 2 has a U-phase coil input terminal U at one end. 21 , U-phase coil output terminal U at the other end 22 This is a phase coil equipped with the V-phase coil input terminal V at one end. 31 , the other end is the V-phase coil output terminal V 32 This is a phase coil having a W-phase coil input terminal W at one end. 41 , with the other end being the W-phase coil output terminal W 42 It is a phase coil having [a certain characteristic].

[0023] A cylindrical coil 1 is formed by arranging multiple such phase coils such that each phase coil is offset from the other in the circumferential direction relative to the axial direction 100, as shown in Figure 1.

[0024] In the embodiment, the cylindrical coil 1 of the U-phase, V-phase, and W-phase is arranged such that the V-phase coil 3 is offset circumferentially from the U-phase coil 2, and the W-phase coil 4 is offset circumferentially from the V-phase coil 3, as shown in Figure 1.

[0025] FIG. 4 shows a flat-plate coil 11 in a flat state before the cylindrical coil 1 shown in FIG. 1 is formed. By curving the flat-plate coil 11 shown in FIG. 4 into a cylindrical shape such that the right end and the left end in FIG. 4 are close to each other in the circumferential direction with respect to the axial direction 100 in FIG. 1, the cylindrical coil 1 shown in FIG. 1 is formed. When the flat-plate coil 11 shown in FIG. 4 is curved into a cylindrical shape to form the cylindrical coil 1 as shown in FIG. 1, in FIG. 4, the U-phase coil input terminal U 21 , the V-phase coil input terminal V 31 , and the W-phase coil input terminal W 41 , and the W-phase coil output terminal W 42 are located on the left side of the flat-plate coil 11 where they exist, and the right side of the flat-plate coil 11 in FIG. 4 becomes close to each other in the circumferential direction as shown in FIG. 1. Thus, by curving the flat-plate coil 11 in the state shown in FIG. 4 into a cylindrical shape, the cylindrical coil 1 shown in FIG. 1 is formed.

[0026] In the state shown in FIG. 1, the V-phase coil 3 is arranged offset in the circumferential direction with respect to the U-phase coil 2, and the W-phase coil 4 is arranged offset in the circumferential direction with respect to the V-phase coil 3. Therefore, even at the time of the flat-plate coil 11 before being curved into a cylindrical shape, the V-phase coil 3 is arranged offset to the right with respect to the U-phase coil 2 in FIG. 4, and the W-phase coil 4 is arranged offset to the right with respect to the V-phase coil 3 in FIG. 4.

[0027] Each phase coil is composed of a plurality of long conductive wires bundled together, each having a wire input end and a wire output end, and extending from the wire input end located at the phase coil input terminal to the wire output end located at the phase coil output terminal.

[0028] In the illustrated embodiment, each of the U-phase coil 2, the V-phase coil 3, and the W-phase coil 4 is composed of six long conductive wires bundled together and has the same configuration and structure.

[0029] Therefore, hereinafter, the U-phase coil 2 will be described, and the description of the V-phase coil 3 and the W-phase coil 4 will be omitted.

[0030] The U-phase coil 2 consists of six long conductive wires U 5-1 , U 5-2 , U 5-3 , U 5-4 , U 5-5 , U 5-6 These are bundled together to form the structure (Figures 6 and 7).

[0031] Wire U 5-1 The wire input terminal U 5-1-1 and wire output terminal U 5-1-2 It is equipped with a wire input terminal U 5-1-1 From wire output terminal U 5-1-2 It extends to the wire U. 5-2 The wire input terminal U 5-2-1 and wire output terminal U 5-2-2 It is equipped with a wire input terminal U 5-2-1 From wire output terminal U 5-2-2 It extends to the wire U. 5-3 The wire input terminal U 5-3-1 and wire output terminal U 5-3-2 It is equipped with a wire input terminal U 5-3-1 From wire output terminal U 5-3-2 It extends to the wire U. 5-4 The wire input terminal U 5-4-1 and wire output terminal U 5-4-2 It is equipped with a wire input terminal U 5-4-1 From wire output terminal U 5-4-2 It extends to the wire U. 5-5 The wire material input terminal U 5-5-1 and wire output terminal U 5-5-2 It is equipped with a wire input terminal U 5-5-1 From wire output terminal U 5-5-2 It extends to the wire U. 5-6 The wire input terminal U 5-6-1 and wire output terminal U 5-6-2 It is equipped with a wire input terminal U 5-6-1 From wire output terminal U 5-6-2 It extends to that.

[0032] As shown in Figures 6 and 7, the wire U 5-1 , U 5-2 , U 5-3 , U 5-4 , U5-5 and the wire input end U 5-6 of the wire input end U 5-1-1 the wire input end U 5-2-1 the wire input end U 5-3-1 the wire input end U 5-4-1 the wire input end U 5-5-1 the wire input end U 5-6-1 are all the U-phase coil input ends U which are phase coil input ends 21 and are located at

[0033] Also, the wire U 5-1 and the wire input end U 5-2 and the wire input end U 5-3 and the wire input end U 5-4 and the wire input end U 5-5 and the wire input end U 5-6 and the wire output end U 5-1-2 the wire output end U 5-2-2 the wire output end U 5-3-2 the wire output end U 5-4-2 the wire output end U 5-5-2 the wire output end U 5-6-2 are all the U-phase coil output ends U which are phase coil output ends 22 and are located at

[0034] Thus, each one has the wire input end U 5-1-1 the wire input end U 5-2-1 the wire input end U 5-3-1 the wire input end U 5-4-1 A the wire input end U 5-5-1 the wire input end U 5-6-1 and the wire output end U 5-1-2 the wire output end U 5-2-2 the wire output end U 5-3-2 the wire output end U 5-4-2 the wire output end U 5-5-2 the wire output end U 5-6-2 and has the wire input end U which is the U-phase coil input end and is the phase coil input end 21 and is located at the wire input end U 5-1-1 the wire input end U 5-2-1 the wire input end U 5-3-1 the wire input end U 5-4-1 the wire input end U 5-5-1 the wire input end U 5-6-1 from the wire input end U which is the U-phase coil input end and is the phase coil input end 22 to the wire output end U which is located at the U-phase coil output end and is the phase coil output end5-1-2 and the wire output terminal U 5-2-2 and the wire output terminal U 5-3-2 and the wire output terminal U 5-4-2 and the wire output terminal U 5-5-2 and the wire output terminal U 5-6-2 Six long conductive wires U extending thereto 5-1 and U 5-2 and U 5-3 and U 5-4 and U 5-5 and U 5-6 are bundled to form the U-phase coil 2 as a phase coil

[0035] The long conductive wire U 5-1 and U 5-2 and U 5-3 and U 5-4 and U 5-5 and U 5-6 is, for example, made of copper and is an ultra-fine wire whose outer periphery is covered with an enamel layer or the like. The wire diameter is selected from the range of, for example, 0.05 to 0.2 mm. The six bundled wires U 5-1 and U 5-2 and U 5-3 and U 5-4 and U 5-5 and U 5-6 are entirely covered with a fibrous material made of glass fiber or the like

[0036] Since a plurality of long conductive wires are bundled in this way, each phase coil is also long. The U-phase coil 2 is a long phase coil extending from the U-phase coil input terminal U at one end 21 to the U-phase coil output terminal U at the other end 22 The V-phase coil 3 is a long phase coil extending from the V-phase coil input terminal V at one end 31 to the V-phase coil output terminal V at the other end 32 The W-phase coil 4 is a long phase coil extending from the W-phase coil input terminal W at one end 41 to the W-phase coil output terminal W at the other end 42

[0037] ​Each of the long U-phase coil 2, long V-phase coil 3, and long W-phase coil 4 extends circumferentially while repeatedly curving up and down in a wave-like manner in the axial direction 100, as shown in Figure 1. In the flat plate coil 11 before it is curved into a cylindrical shape as shown in Figure 1, each of the long U-phase coil 2, long V-phase coil 3, and long W-phase coil 4 extends in the left-right direction in Figure 4, which corresponds to the circumferential direction when it is curved into a cylindrical shape, while repeatedly curving up and down in a wave-like manner as shown in Figure 4.

[0038] As shown in Figure 1, in this embodiment of the cylindrical coil 1, the V-phase coil 3 is positioned offset circumferentially from the U-phase coil 2, and the W-phase coil 4 is positioned offset circumferentially from the V-phase coil 3. In the configurations shown in Figures 1, 6, and 7, the long U-phase coil 2, the long V-phase coil 3, and the long W-phase coil 4 each extend circumferentially while repeatedly curving up and down in a wave-like manner in the axial direction 100, as shown in Figure 1.

[0039] That is, in each of the U-phase coil 2, V-phase coil 3, and W-phase coil 4, the input terminal U of the U-phase coil 21 and U-phase coil output terminal U 22 and are located in close proximity in the circumferential direction, and the V-phase coil input terminal V 31 and V-phase coil output terminal V 32 The two are located in close proximity in the circumferential direction, and the W-phase coil input terminal W 41 And the W-phase coil output terminal W 42 The two are located in close proximity in the circumferential direction. Also, the input terminal U of the U-phase coil 21 U-phase coil output terminal U 22 V-phase coil input terminal V 31 , V-phase coil output terminal V 32 W-phase coil input terminal W 41 W-phase coil output terminal W 42 The long U-phase coil 2, the long V-phase coil 3, and the long W-phase coil 4 each extend circumferentially, repeatedly curving up and down in a wave-like manner in the axial direction 100, as shown in Figure 1, so that the entire structure is located in close proximity in the circumferential direction.

[0040] Each of these is a long phase coil extending from the coil input end to the coil output end. In the flattened state shown in Figure 4, it extends in the left-right direction perpendicular to the vertical direction while repeatedly curving in a wave-like pattern that moves up and down in Figure 4. In the cylindrical state shown in Figure 1, it extends in the circumferential direction while repeatedly curving in a wave-like pattern that moves up and down in the axial direction of 100. An example of an embodiment in which the input and output ends of each of the U-phase coil 2, V-phase coil 3, and W-phase coil 4 are located in close proximity as described above in the cylindrical coil 1 state will be explained with reference to Figures 8 to 12.

[0041] Figure 8 is a partially omitted perspective view showing an example of the arrangement of each phase coil in the rightmost part of Figure 4 (Figure 5(b)) of the flat coil 11 in the state shown in Figure 4. The right side of Figure 4 explains how each phase coil curves in a wave-like manner in the vertical direction of Figure 4 while extending in the horizontal direction of Figure 4.

[0042] In the W-phase coil 4, the lower curved portion W is located on the right side of Figure 4. 71 From the coil section W 4-2 And, coil part W 4-1 The coil part W is extended. 4-2 The W-phase coil output terminal W 42 From the W-phase coil input terminal W 41 This is the coil portion that extends in the opposite direction toward the direction. Coil portion W 4-1 The W-phase coil input terminal W 41 From the W-phase coil output terminal W 42 This is the coil portion that extends in the forward direction toward the direction.

[0043] In the V-phase coil 3, the lower curved portion V is located on the right side of Figure 4. 71 From, coil section V 3-2 And, the coil part V 3-1 The coil part V is extended. 3-2 The V-phase coil output terminal V 32 From the V-phase coil input terminal V 31 This is the coil portion that extends in the opposite direction toward the end. Coil portion V 3-1 The V-phase coil input terminal V 31 From the V-phase coil output terminal V 32 This is the coil portion that extends in the forward direction toward the direction.

[0044] In the U-phase coil 2, the lower curved portion U is located in the right-hand part of Figure 4. 71 From the coil section U 2-2 And, the coil part U 2-1 The coil part U is extended. 2-2 U-phase coil output terminal U 22 From the U-phase coil input terminal U 21 This is the coil portion that extends in the opposite direction toward the direction. Coil portion U 2-1 U-phase coil input terminal U 21 From the U-phase coil output terminal U 22 This is the coil portion that extends in the forward direction toward the direction.

[0045] In Figure 8, the V-phase coil 3 is positioned offset to the right of the W-phase coil 4. Similarly, the U-phase coil 2 is positioned offset to the right of the V-phase coil 3.

[0046] Figure 9 is a partially omitted perspective view showing an example in which each phase coil extends in the left-right direction perpendicular to the vertical direction, while repeating the wavy curvature in the vertical direction as shown in Figure 4, starting from the state shown in Figure 8.

[0047] Coil section W 4-2 The curved part W 71 The curved part W is the side that faces the other in the vertical direction. 72 Then it curves and again at the curved section W 71 In the direction in which the curved portion W exists, 71 Curved portion W on the side where it exists 71 The next curved section W is shifted to the right in Figure 8 from the position where the previous curve existed. 73 Then it curves and again at the curved section W 72 It moves in the direction in which it exists. In this way, the coil portion W that constitutes the W-phase coil 4 4-2 It extends to the right in the circumferential direction of the cylindrical coil 1, as shown in Figure 9, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0048] Coil section V 3-2 The curved part V 71The curved portion V is the side that faces the other in the vertical direction. 72 Then it curves and again at the curved section V 71 In the direction in which the curved portion V exists, 71 Curved section V on the side where it exists 71 The next curved section V is shifted to the right in Figure 9 from the position where it was located. 73 Then it curves and again at the curved section V 72 It moves in the direction in which it exists. In this way, the coil portion V that constitutes the V-phase coil 3 3-2 It extends to the right in the circumferential direction of the cylindrical coil 1, as shown in Figure 9, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0049] Coil section U 2-2 The curved part U 71 The curved part U is the side that faces the other in the vertical direction. 72 Then it curves and again at the curved section U 71 In the direction in which the curved portion U exists, 71 Curved portion U on the side where it exists 71 The next curved section U is shifted to the right in Figure 8 from the position where it was located. 73 Then it curves and again at the curved section U 72 It moves in the direction in which it exists. In this way, the coil portion U that constitutes the U-phase coil 2 2-2 It extends to the right in the circumferential direction of the cylindrical coil 1, as shown in Figure 9, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0050] In the embodiment shown in Figure 9, the curved portion W of the W-phase coil 4 71 In contrast, the curved portion V of the V-phase coil 3 71 The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 71 The curved portion V of the V-phase coil 3 is on the upper side (front side in the drawing). 71 It is arranged in the curved part V of the V-phase coil 3. 71 In contrast, the curved portion U of the U-phase coil 2 71 The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 71 The curved part U of the U-phase coil 2 is on the upper side (front side in the drawing). 71It is positioned there.

[0051] Furthermore, in the embodiment shown in Figure 9, the curved portion W of the W-phase coil 4 72 In contrast, the curved portion V of the V-phase coil 3 72 The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 72 The curved portion V of the V-phase coil 3 is on the lower side (back side in the drawing). 72 It is arranged in the curved part V of the V-phase coil 3. 72 In contrast, the curved portion U of the U-phase coil 2 72 The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 72 The curved part U of the U-phase coil 2 is on the lower side (back side in the drawing). 72 It is positioned there.

[0052] Furthermore, in the embodiment shown in Figure 9, the curved portion W of the W-phase coil 4 73 In contrast, the curved portion V of the V-phase coil 3 73 The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 73 The curved portion V of the V-phase coil 3 is on the upper side (front side in the drawing). 73 It is arranged in the curved part V of the V-phase coil 3. 73 In contrast, the curved portion U of the U-phase coil 2 73 The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 73 The curved part U of the U-phase coil 2 is on the upper side (front side in the drawing). 73 It is positioned there.

[0053] W phase coil 4 coil portion W 4-2 And, coil part W 4-1 In the overlapping portion D1 in Figure 9, the coil portion W 4-2 The coil part W 4-1 It is positioned to overlap the upper side (the front side of the drawing).

[0054] V-phase coil 3, coil portion V 3-2 And, the coil part V 3-1 In the overlapping portion D2 in Figure 9, the coil portion V 3-2 The coil part V 3-1 It is positioned to overlap the upper side (the front side of the drawing).

[0055] U-phase coil 2, coil portion U 2-2 And, the coil part U 2-1 In the overlapping portion D3 in Figure 98, the coil portion V 2-2 The coil part V 2-1 It is positioned to overlap the upper side (the front side of the drawing).

[0056] In Figure 9, the points indicated by symbols D1, D2, and D3 are the phase coil input terminals U of each phase coil 2, 3, and 4. 21 , V 21 , W 21 From each phase coil output terminal U 22 , V 22 , W 22 The coil portion U in each phase coil extends axially 100 in the forward direction toward the coil. 2-1 , V 3-1 , W 4-1 And, the phase coil output terminal U at each phase coil 2, 3, and 4 22 , V 22 , W 22 From each phase coil input terminal U 21 , V 21 , W 21 The coil portion U is the opposite axial portion in each phase coil that extends axially 100 in the opposite direction toward the 2-2 , V 3-2 , W 4-2 These points intersect in a radial direction perpendicular to the axial direction 100 when the cylindrical shape is formed as shown in Figure 1, so as to overlap each other.

[0057] Figure 10 is a partially omitted perspective view showing an example in which, following the state illustrated in Figure 9, each phase coil extends in the left-right direction perpendicular to the vertical direction while repeating the wavy curvature in the vertical direction as shown in Figure 4.

[0058] As shown in Figure 9, the curved section W 73 Then it curves and again at the curved section W 72 Coil portion W facing the direction in which it exists 4-2 The curved part W 72 Curved portion W on the side where it exists 72The next curved section W is shifted to the right in Figure 10 from the position where the previous curve existed. 74 Then it curves and again at the curved section W 71 , W 73 It moves in the direction where it exists.

[0059] Meanwhile, coil portion W 4-1 The curved part W 71 From curved section W 72 Extending toward the side where it exists, curved portion W 72 On the side where it exists, the curved portion W 72 In Figure 10, the position where it was located is shifted to the right, and furthermore, the curved portion W mentioned above is shifted to the right. 74 Rather, the curved section W, which is shifted to the left in Figure 10. 75 Then it curves and again at the curved section W 71 , W 73 In the direction in which the curved portion W exists, 73 The next curved section W is shifted to the right in Figure 10 from the position where the previous curve existed. 76 Then it curves and again at the curved section W 72 , W 75 , W 74 It moves in the direction where it exists.

[0060] As shown in Figure 9, the curved portion V 73 Then it curves and again at the curved section V 72 Coil portion V facing the direction in which it exists 3-2 The curved part V 72 Curved section V on the side where it exists 72 The next curved section V is shifted to the right in Figure 10 from the position where it was located. 74 Then it curves and again at the curved section V 71 , V 73 It moves in the direction where it exists.

[0061] Meanwhile, coil portion V 3-1 The curved part V 71 From the curved section V 72 It extends toward the side where it exists, and the curved part V 72 On the side where it exists, curved portion V 72 In Figure 10, the position where it was located is shifted to the right, and furthermore, the curved portion V mentioned above is shifted to the right.74 Rather, the curved portion V that is shifted leftward in FIG. 10 75 curves and again the curved portion V 71 、V 73 moves toward the direction in which the curved portion V 73 is present, and from the position where the curved portion V 76 is present, it curves at the next curved portion V that is shifted rightward in FIG. 10 and again the curved portion V 72 、V 75 、V 74 moves toward the direction in which the curved portion V

[0062] As shown in FIG. 9, the coil portion U that moves toward the direction in which the curved portion U 73 curves and again the curved portion U 72 is present 2-2 is, on the side where the curved portion U 72 is present, shifted rightward in FIG. 10 from the position where the curved portion U 72 was present, and curves at the next curved portion U that is shifted rightward in FIG. 10 and again the curved portion U 74 、U 71 moves toward the direction in which the curved portion U 73 is present

[0063] On the other hand, the coil portion U 2-1 extends from the curved portion U 71 toward the side where the curved portion U 72 is present, and on the side where the curved portion U 72 is present, it is shifted rightward in FIG. 10 from the position where the curved portion U 72 was present, and further, compared with the above-described curved portion U 74 it is shifted leftward in FIG. 10 at the curved portion U 75 and curves again at the curved portion U 71 、U 73 moves toward the direction in which the curved portion U 73 is present, and from the position where the curved portion U 76 is present, it curves at the next curved portion U that is shifted rightward in FIG. 10 and again the curved portion U 72 、U 75 、U 74 moves toward the direction in which the curved portion U

[0064] In the embodiment shown in FIG. 10, the curved portion U of the U-phase coil 2 71With respect to the curved portion W of the W-phase coil 4 73 is shifted to the right side of the drawing, and the curved portion W of the W-phase coil 4 71 is disposed above (front side of the drawing) the curved portion U of the U-phase coil 2. Also, the curved portion W of the W-phase coil 4 73 is shifted to the right side of the drawing, and the curved portion V of the V-phase coil 3 73 is disposed above (front side of the drawing) the curved portion W of the W-phase coil 4. The curved portion V of the V-phase coil 3 73 is shifted to the right side of the drawing, and the curved portion U of the U-phase coil 2 73 is disposed above (front side of the drawing) the curved portion V of the V-phase coil 3. 73 With respect to the curved portion V of the V-phase coil 3 73 the curved portion U of the U-phase coil 2 73 is shifted to the right side of the drawing, and the curved portion U of the U-phase coil 2 73 is disposed above (front side of the drawing) the curved portion V of the V-phase coil 3. 73

[0065] Furthermore, with respect to the curved portion U of the U-phase coil 2 73 the curved portion W of the W-phase coil 4 76 is shifted to the right side of the drawing, and the curved portion W of the W-phase coil 4 73 is disposed above (front side of the drawing) the curved portion U of the U-phase coil 2. The curved portion W of the W-phase coil 4 76 is shifted to the right side of the drawing, and the curved portion V of the V-phase coil 3 76 is disposed above (front side of the drawing) the curved portion W of the W-phase coil 4. The curved portion V of the V-phase coil 3 76 is shifted to the right side of the drawing, and the curved portion U of the U-phase coil 2 76 is disposed above (front side of the drawing) the curved portion V of the V-phase coil 3. 76 The curved portion V of the V-phase coil 3 76 is shifted to the right side of the drawing, and the curved portion U of the U-phase coil 76 is disposed above (front side of the drawing) the curved portion V of the V-phase coil 3. 76 The curved portion U of the U-phase coil 2 76 is disposed.

[0066] Also, in the embodiment shown in FIG. 10, with respect to the curved portion U of the U-phase coil 2 72 the curved portion W of the W-phase coil 4 75 is shifted to the right side of the drawing, and the curved portion W of the W-phase coil 4 72 is disposed below (back side of the drawing) the curved portion U of the U-phase coil 2. 75 ​It is arranged in the curved part W of the W-phase coil 4. 75 In contrast, the curved portion V of the V-phase coil 3 75 The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 75 The curved portion V of the V-phase coil 3 is on the lower side (back side in the drawing). 75 The curved portion V of the V-phase coil 3 is positioned. 75 In contrast, the curved portion U of the U-phase coil 2 75 The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 75 The curved part U of the U-phase coil 2 is on the lower side (back side in the drawing). 75 It is positioned there.

[0067] And the curved part U of the U-phase coil 2 75 In contrast, the curved portion W of the W-phase coil 4 74 The curved part U of the U-phase coil 2 is shifted to the right side of the drawing. 75 The curved portion W of the W-phase coil 4 is on the lower side (back side in the drawing). 74 The curved portion W of the W-phase coil 4 is positioned. 74 In contrast, the curved portion V of the V-phase coil 3 74 The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 74 The curved portion V of the V-phase coil 3 is on the lower side (back side in the drawing). 74 The curved portion V of the V-phase coil 3 is positioned. 74 In contrast, the curved portion U of the U-phase coil 2 74 The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 74 The curved part U of the U-phase coil 2 is on the lower side (back side in the drawing). 74 It is positioned there.

[0068] Figures 11 and 12 are perspective views, partially omitted, showing an example of the arrangement of each phase coil in the leftmost part of Figure 4 (Figure 5(a)) of the flat coil 11 in the state shown in Figure 4. The left side of Figure 4 explains how each phase coil curves in a wave-like manner in the vertical direction of Figure 4 while extending in the horizontal direction of Figure 4.

[0069] In Figures 11 and 12, the V-phase coil 3 is positioned offset to the right of the U-phase coil 2 in the drawing. Similarly, the W-phase coil 4 is positioned offset to the right of the V-phase coil 3 in the drawing.

[0070] Figures 11 and 12 show that each phase coil extends in the left-right direction perpendicular to the vertical direction while repeatedly curving in the vertical direction as shown in Figure 4, and as shown in Figure 1, each of the long U-phase coil 2, V-phase coil 3, and W-phase coil 4 extends in the circumferential direction while repeatedly curving in the vertical direction 100 as shown in Figure 1, and in each of the U-phase coil 2, V-phase coil 3, and W-phase coil 4, as shown in Figure 1, the input terminal U of the U-phase coil 21 U-phase coil output terminal U 22 V-phase coil input terminal V 31 , V-phase coil output terminal V 32 W-phase coil input terminal W 41 W-phase coil output terminal W 42 This is a partially omitted perspective view illustrating an example where the entire structure lies in close proximity to each other in the circumferential direction.

[0071] In the U-phase coil 2, the input terminal of the U-phase coil U 21 From the U-phase coil output terminal U 22 The coil portion U is the coil portion that extends in the forward direction toward the direction. 2-1 This is the upper curved portion U in the left part of Figure 4. 7n Curved, curved section U 7n The curved part U is the side that faces the other in the vertical direction. 7(n-1) In the direction in which the curved portion U exists, 7(n-1) Then it curves and again at the curved section W 7n In the direction in which the curved portion W exists, 7n Curved portion W on the side where it exists 7n The next curved section W is shifted to the right in Figures 11 and 12 from the position where the previous curve existed. 7(n-2) Then it curves and again at the curved section W 7(n-1) It moves in the direction in which it exists. In this way, the coil portion U that constitutes the U-phase coil 2 2-1It extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0072] Also, the U-phase coil output terminal U 22 From the U-phase coil input terminal U 21 The coil portion U is the coil portion that extends in the opposite direction toward the direction toward the end. 2-2 The curved part U 7n , curved section U 7(n-2) On the side where the curved portion U exists, 7n Further to the right in the drawing, curved section U 7(n-2) The curved section U is located further to the left in the drawing. 7(n-3) Curved, curved section U 7(n-1) In the direction in which the curved portion U exists, 7(n-4) Then it curves and again at the curved section U 7n , U 7(n-3) It moves in the direction in which it exists. In this way, the coil portion U that constitutes the U-phase coil 2 2-2 Furthermore, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed, it extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12.

[0073] In the V-phase coil 3, the V-phase coil input terminal V 31 From the V-phase coil output terminal U 32 The coil portion V is the coil portion that extends in the forward direction toward the direction. 3-1 This is the upper curved portion V in the left side of Figure 4. 7n It curves and the curved part V 7n The curved portion V is the side that faces the other in the vertical direction. 7(n-1) In the direction in which the curved portion V exists, 7(n-1) Then it curves and again at the curved section V 7n In the direction in which the curved portion V exists, 7n Curved section V on the side where it exists 7n The next curved section V is shifted to the right in Figures 11 and 12 from the position where it was located. 7(n-2) Then it curves and again at the curved section V 7(n-1) It moves in the direction in which it exists. In this way, the coil portion V that constitutes the V-phase coil 32-1 It extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0074] Also, the V-phase coil output terminal V 22 From the V-phase coil input terminal V 21 The coil portion V is the coil portion that extends in the opposite direction toward the direction toward the end. 2-2 The curved part V 7n Curved section V 7(n-2) On the side where the curved portion V exists, 7n Further to the right in the drawing, curved section V 7(n-2) Curved section V located further to the left in the drawing. 7(n-3) It curves and the curved part V 7(n-1) In the direction in which the curved portion V exists, 7(n-4) Then it curves and again at the curved section V 7n , V 7(n-3) It moves in the direction in which it exists. In this way, the coil portion V that constitutes the V-phase coil 3 2-2 Furthermore, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed, it extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12.

[0075] In the W-phase coil 4, the W-phase coil input terminal W 41 From the W-phase coil output terminal W 42 The coil portion W is the coil portion that extends in the forward direction toward the end. 3-1 This is the upper curved portion W in the left-hand part of Figure 4. 7n Curved, curved part W 7n The curved part W is the side that faces the other in the vertical direction. 7(n-1) In the direction in which the curved portion W exists, 7(n-1) Then it curves and again at the curved section W 7n In the direction in which the curved portion W exists, 7n Curved portion W on the side where it exists 7n The next curved section W is shifted to the right in Figures 11 and 12 from the position where the previous curve existed. 7(n-2) Then it curves and again at the curved section W 7(n-1)It moves in the direction in which it exists. In this way, the coil portion W that constitutes the W-phase coil 4 2-1 It extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed.

[0076] Also, the W-phase coil output terminal W 42 From the W-phase coil input terminal W 41 The coil portion W is the coil portion that extends in the opposite direction toward the coil portion. 4-2 The curved part W 7n , curved section W 7(n-2) On the side where the curved portion W exists, 7n Further to the right in the drawing, curved section W 7(n-2) Curved section W located further to the left in the drawing 7(n-3) Curved, curved part W 7(n-1) It moves in the direction where the curved section W exists, and then curves again. 7(n-3) It moves in the direction in which it exists. In this way, the coil portion V that constitutes the V-phase coil 3 2-2 Furthermore, while repeatedly curving up and down in a wave-like manner along the axial direction 100 when the cylindrical coil 1 is formed, it extends in the left-right direction, which is the circumferential direction when the cylindrical coil 1 is formed, as shown in Figures 11 and 12.

[0077] In the embodiments shown in Figures 11 and 12, the curved portion U of the U-phase coil 2 7n In contrast, the curved portion V of the V-phase coil 3 7n The curved part U of the U-phase coil 2 is shifted to the right side of the drawing. 7n The curved portion V of the V-phase coil 3 is on the lower side (back side in the drawing). 7n It is positioned there.

[0078] V-phase coil 3 curved portion V 7n In contrast, the curved portion W of the W-phase coil 4 7n The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 7n The curved portion W of the W-phase coil 4 is on the lower side (back side in the drawing). 7n It is positioned there.

[0079] Curved portion U of U-phase coil 2 7(n-1)In contrast, the curved portion V of the V-phase coil 3 7(n-1) The curved part U of the U-phase coil 2 is shifted to the right side of the drawing. 7(n-1) The curved portion V of the V-phase coil 3 is on the upper side (front side in the drawing). 7(n-1) It is positioned there.

[0080] V-phase coil 3 curved portion V 7(n-1) In contrast, the curved portion W of the W-phase coil 4 7(n-1) The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 7(n-1) The curved portion W of the W-phase coil 4 is on the upper side (front side in the drawing). 7(n-1) It is positioned there.

[0081] W phase coil 4 curved section W 7n In contrast, the curved portion U of the U-phase coil 2 7(n-3) The curved part W of the W-phase coil 4 is shifted to the right side of the drawing. 7n The curved part U of the U-phase coil 2 is on the lower side (back side in the drawing). 7(n-3) It is positioned there.

[0082] Curved portion U of U-phase coil 2 7(n-3) In contrast, the curved portion V of the V-phase coil 3 7(n-3) The curved part U of the U-phase coil 2 is shifted to the right side of the drawing. 7(n-3) The curved portion V of the V-phase coil 3 is on the lower side (back side in the drawing). 7(n-3) It is positioned there.

[0083] Curved portion U of the V-phase coil 3 7(n-3) In contrast, the curved portion W of the W-phase coil 4 7(n-3) The curved portion V of the V-phase coil 3 is shifted to the right side of the drawing. 7(n-3) The curved portion W of the W-phase coil 4 is on the lower side (back side in the drawing). 7(n-3) is located U-phase coil 2, coil portion U 2-1 And, the coil part U 2-2 The overlapping portion D in Figures 11 and 12. n Now, the coil part U 2-1 The coil part U 2-2 It is positioned to overlap the upper side (the front side of the drawing).

[0084] V-phase coil 3, coil portion V3-1 and the coil portion V 3-2 and the portion D where they overlap in FIGS. 11 and 12 n-1 In this case, the coil portion V 3-1 is arranged to overlap the upper side (front side of the drawing) of the coil portion V 3-2

[0085] The coil portion W of the W-phase coil 4 4-1 and the coil portion W 4-2 and the portion D where they overlap in FIGS. 11 and 12 n-2 In this case, the coil portion W 4-1 is arranged to overlap the upper side (front side of the drawing) of the coil portion W 4-2

[0086] The coil portion W of the W-phase coil 4 4-1 and the coil portion W 4-2 and the portion D where they overlap in FIGS. 11 and 12 n-2 At the position indicated by the symbol D on the right side in the drawing of the portion D n-3 once again, the coil portion U of the U-phase coil 2 2-1 and the coil portion U 2-2 overlap, and here, the coil portion U 2-2 is arranged to overlap the upper side (front side of the drawing) of the coil portion U 2-1

[0087] The coil portion U of the U-phase coil 2 2-1 and the coil portion U 2-2 and the portion D where they overlap in FIGS. 11 and 12 n-3 At the position indicated by the symbol D on the right side in the drawing of the portion D n-4 once again, the coil portion V of the V-phase coil 3 3-1 and the coil portion V 3-2 overlap, and here, the coil portion V 3-2 is arranged to overlap the upper side (front side of the drawing) of the coil portion V 3-1

[0088] The coil portion V of the V-phase coil 3 3-1 and the coil portion V 3-2 and the portion D where they overlap in FIGS. 11 and 12 n-4 At the position indicated by the symbol D on the right side in the drawing of the portion D​​​​n-5 At the location indicated, again, the coil portion W of the W-phase coil 4 4-1 And, coil part W 4-2 These overlap, and here, the coil part W 4-2 The coil part W 4-1 It will be positioned to overlap the upper side (the front side of the drawing).

[0089] In Figure 9, the points indicated by symbols D1, D2, and D3 are the phase coil input terminals U of each phase coil 2, 3, and 4. 21 , V 21 , W 21 From each phase coil output terminal U 22 , V 22 , W 22 The coil portion U in each phase coil extends axially 100 in the forward direction toward the coil. 2-1 , V 3-1 , W 4-1 And, the phase coil output terminal U at each phase coil 2, 3, and 4 22 , V 22 , W 22 From each phase coil input terminal U 21 , V 21 , W 21 The coil portion U is the opposite axial portion in each phase coil that extends axially 100 in the opposite direction toward the 2-2 , V 3-2 , W 4-2 These points intersect in a radial direction perpendicular to the axial direction 100 when the cylindrical shape is formed as shown in Figure 1, so as to overlap each other.

[0090] Similarly, in Figures 11 and 12, the symbol D n , D n-1 , D n-2 , D n-3 , D n-4 , D n-5 The area indicated is the phase coil input terminal U in each phase coil 2, 3, and 4. 21 , V 21 , W 21 From each phase coil output terminal U 22 , V 22 , W 22The coil portion U in each phase coil extends axially 100 in the forward direction toward the coil. 2-1 , V 3-1 , W 4-1 And, the phase coil output terminal U at each phase coil 2, 3, and 4 22 , V 22 , W 22 From each phase coil input terminal U 21 , V 21 , W 21 The coil portion U is the opposite axial portion in each phase coil that extends axially 100 in the opposite direction toward the 2-2 , V 3-2 , W 4-2 These points intersect in a radial direction perpendicular to the axial direction 100 when the cylindrical shape is formed as shown in Figure 1, so as to overlap each other.

[0091] In the arrangement described above using Figures 8 to 12, each of the long U-phase coils 2, V-phase coil 3, and W-phase coil 4 extends circumferentially while repeatedly curving up and down in a wave-like manner in the axial direction 100 shown in Figure 1. As a result, in each of the U-phase coils 2, V-phase coil 3, and W-phase coil 4, the input terminal of the U-phase coil U 21 U-phase coil output terminal U 22 V-phase coil input terminal V 31 , V-phase coil output terminal V 32 W-phase coil input terminal W 41 W-phase coil output terminal W 42 The entire structure is arranged so that it is located in close proximity to each other in the circumferential direction.

[0092] That is, in each of the U-phase coil 2, V-phase coil 3, and W-phase coil 4, as shown in Figure 1, the input terminal U of the U-phase coil 21 U-phase coil output terminal U 22 V-phase coil input terminal V 31 , V-phase coil output terminal V 32 W-phase coil input terminal W 41 W-phase coil output terminal W 42 In the arrangement described above using Figures 8 to 12, in which the entire structure is located in close proximity in the circumferential direction, the phase coil input terminals U of phase coils 2, 3, and 421 , V 31 , W 41 From the phase coil output terminal U 22 , V 32 , W 42 Forward axial portion U in phase coils 2, 3, and 4, which extend axially 100 in the forward direction toward the phase coils 2, 3, and 4. 2-1 , V 3-1 , W 4-1 And, the phase coil output terminal U in phase coils 2, 3, and 4 22 , V 32 , W 42 From the phase coil input terminal U 21 , V 31 , W 41 The opposite axial portion U in the phase coils 2, 3, and 4 that extend axially 100 in the opposite direction toward the 2-2 , V 3-2 , W 4-2 The phase coils 2, 3, and 4 extend circumferentially, intersecting each other in the radial direction perpendicular to the axial direction of 100.

[0093] And this forward axial portion U 2-1 , V 3-1 , W 4-1 And the opposite axial portion U 2-2 , V 3-2 , W 4-2 At the intersections where they overlap each other, adjacent intersection positions D1, D2, D3, D in the circumferential direction n , D n-1 , D n-2 , D n-3 , D n-4 , D n-5 Each, forward axial portion U 2-1 , V 3-1 , W 4-1 And the opposite axial portion U 2-2 , V 3-2 , W 4-2 The structure is such that the positions of the elements are swapped in the radial direction, perpendicular to the axial direction of 100°, moving inward and outward.

[0094] Also, the intersection points D1, D2, D3, D in Figures 10 and 12 n , D n-1 , D n-2 , D n-3 , Dn-4 , D n-5 As shown in the figure, the forward axial portion U 2-1 , V 3-1 , W 4-1 And the opposite axial portion U 2-2 , V 3-2 , W 4-2 The overlapping intersections between them are the forward axial portion U in each of the phase coils 2, 3, and 4. 2-1 and the opposite axial portion U 2-2 Between and, forward axial portion V 3-1 and the opposite axial portion V 3-2 Between and, forward axial portion W 4-1 and the opposite axial portion W 4-2 It is performed only between [the two parties].

[0095] And the forward axial portion U of the phase coils 2, 3, and 4, which are adjacent in the circumferential direction. 2-1 , V 3-1 , W 4-1 and the opposite axial portion U 2-2 , V 3-2 , W 4-2 Between the intersection points of the two, the forward axial portion U of one or more other phase coils 2, 3, 4 2-1 , V 3-1 , W 4-1 and the opposite axial portion U 2-2 , V 3-2 , W 4-2 An intersection is to occur between them.

[0096] In Figure 12, the coil portion U of the U-phase coil 2 2-1 And, the coil part U 2-2 The point where they intersect in Figures 11 and 12 is D. n and D n-3 Between, D n-1 At the intersection point, the coil portion of the V-phase coil 3 V 3-1 And, the coil part V 3-2 And intersect, D n-2 At the intersection point, the coil portion of the W phase coil 4 W 4-1 And, coil part W 4-2 They intersect.

[0097] Given this structure, when viewed from the side in an enlarged state as shown in Figure 12, the adjacent intersection points D in the circumferential direction are n , D n-1 , D n-2 , D n-3 , D n-4 , D n-5 A tiny gap exists between them, which becomes a gap that penetrates the cylindrical coil 1 radially. In the structure of phase coils 2, 3, and 4 described in Figures 8 to 12, the intersection position D is adjacent to the circumferential direction. n , D n-1 , D n-2 , D n-3 , D n-4 , D n-5 The gaps between them are formed uniformly in the circumferential direction of the cylindrical coil 1.

[0098] This void becomes a passage for fluid that flows radially through the cylindrical coil 1. Therefore, it becomes possible to utilize this void to allow the refrigerant to flow radially through the cylindrical coil 1.

[0099] Figures 13 and 14 show a cylindrical yoke 10 with magnets arranged on its inner surface. 1 is, This is a conceptual diagram illustrating an example in which a rotating electric machine 102 is constructed by arranging the cylindrical coil 1 of this embodiment radially outward. When the cylindrical coil of this embodiment is used in combination with a rotor to form a rotating electric machine, the cylindrical coil generates heat when current is applied to it. It is conceivable to contain a refrigerant such as a liquid in the housing that constitutes the rotating electric machine, and to cool the heat-generating element by causing the refrigerant to flow and disperse within the housing due to the rotation of the rotor. In such a case, as described above, by using the aforementioned void portion, which is uniformly formed in the circumferential direction in the peripheral wall of the cylindrical coil 1, as a flow passage for the refrigerant, it becomes possible to efficiently cool the heat-generating element.

[0100] The cylindrical coil 1 of the above embodiment, as described using Figures 1 to 12, consists of three or more coils. Each of the multiple coils is made by insulating and bundling several long conductors together, and then winding or meandering this bundled wire repeatedly in the same pattern from the input end to the output end, as described above, to form a strip-shaped coil material. These strip-shaped coil materials are then prepared in the number of phases used (for example, three phases: U-phase, V-phase, and W-phase), and the coil body is formed into a ring shape such that the input end and output end of the strip-shaped coil material for each phase are in close proximity in the circumferential direction.

[0101] As mentioned above, each of the multiple coils corresponding to multiple phases is made by insulating and bundling multiple long wires together, and then winding or meandering this bundled wire in the same pattern repeatedly from the input end to the output end to form a strip-shaped coil material. Therefore, since multiple wires are wound together, the winding process is simple, and the automation of winding manufacturing becomes easy.

[0102] The cylindrical coil 1 in this embodiment, due to its configuration and structure as described above, does not generate circulating current. Furthermore, it does not generate regenerative power.

[0103] Each of the multiple long phase coils that make up the multi-phase cylindrical coil is formed by bundling together multiple long conductive wires. Therefore, by selecting the number of wires used in the phase coils, the number of coils and connection patterns can be easily changed.

[0104] Each of the multiple long phase coils that make up the multi-phase cylindrical coil is formed by bundling together multiple long conductive wires, so each conductive wire becomes a coil. In other words, as in the embodiment described above, if six wires are used, there will be six coils.

[0105] The desired number of wires are bundled together and extend circumferentially around the cylindrical coil, repeatedly curving up and down in a wave-like pattern along the axial direction of the cylindrical coil.

[0106] The number of coils can be determined by the number of wires. Therefore, variations in coils can be reduced, the generation of circulating current can be suppressed, and manufacturing can be done easily.

[0107] Because there is no concept of a coil unit in the manufacturing process, circulating currents due to variations in the shape and position of individual coil units are less likely to occur.

[0108] By bundling the same number of wires as the desired number of coils together and winding them in a meandering pattern, there is no need to adjust each coil individually, a uniform coil body is created, and copper loss is reduced because the amount of wire material at the top and bottom ends is reduced.

[0109] According to the cylindrical coil of this embodiment, the amount of wire is reduced, which not only lowers costs but also reduces copper loss, thus improving motor efficiency.

[0110] In conventional methods, when connecting known tortoise-shell-shaped coil units to form a cylinder, the top and bottom of the cylinder, in the direction of the rotation axis, protrude in a wave-like manner. These protrusions do not contribute to the motor characteristics. Moreover, these parts that do not contribute to the motor characteristics result in copper losses, negatively impacting motor efficiency. From this perspective, the strip-shaped coil material formed by repeatedly winding or meandering in the same pattern, as in the above-described embodiment, eliminates these problems.

[0111] In the embodiment described above, the strip-shaped coil material formed by repeatedly winding or meandering in the same pattern allows the thickness of the upper and lower overhangs to be substantially equalized in two layers. In conventional cases where known tortoise-shell-shaped coil units are connected to form a cylinder, the upper and lower overhangs were parts that did not contribute to motor torque. In the above-described embodiment, the strip-shaped coil material formed by repeatedly winding or meandering in the same pattern results in a two-layer structure, where the overhang contributes to some extent, thus eliminating coil waste. Furthermore, the amount of winding wire used is reduced, thus reducing copper loss, and the uniform thickness improves strength. Uniform thickness also increases the degree of freedom in the installation position of the coil within the motor.

[0112] Although embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the embodiments described above and can be modified in various ways within the technical scope as understood from the claims.

Claims

1. In a rotating electric machine having a yoke equipped with a magnet and an annular coil housed within a housing, The annular coil has multiple phases arranged concentrically with respect to the axial direction of the rotating shaft of the electric machine, and surrounding the axial direction in a circumferential direction relative to the axial direction. The annular coil is formed by a plurality of phase coils, each having a phase coil input terminal and a phase coil output terminal, which constitute each of the phases among the plurality of phase coils, with each phase coil being positioned offset in the circumferential direction from one of the phase coils. Each wire has a wire input end and a wire output end, and multiple conductive wires extending from the wire input end located at the phase coil input end to the wire output end located at the phase coil output end are bundled together to form each of the phase coils. Each of the phase coils extends in the circumferential direction while repeatedly curving up and down in the axial direction in a wave-like manner. A forward axial portion of one phase coil that extends in the axial direction in the forward direction from the input terminal of the phase coil to the output terminal of the phase coil, The reverse axial portion of the phase coil that extends in the axial direction in the opposite direction from the output terminal of the phase coil to the input terminal of the phase coil, Each extends in an oblique direction that intersects with respect to the axial direction, overlaps with respect to the radial direction perpendicular to the axial direction, and intersects with respect to the oblique direction, so that one of the phase coils extends in the circumferential direction. In each of the multiple phase coils, the input terminal and the output terminal of the phase coil are located in close proximity. At the intersection where the forward axial portion and the reverse axial portion overlap each other, the positions of the forward axial portion and the reverse axial portion are swapped in the radial direction for each adjacent intersection in the circumferential direction. A rotating electric machine characterized by the following features.

2. In a rotating electric machine having a yoke equipped with a magnet and an annular coil housed within a housing, The annular coil has multiple phases arranged concentrically with respect to the axial direction of the rotating shaft of the electric machine, and surrounding the axial direction in a circumferential direction relative to the axial direction. The annular coil is formed by a plurality of phase coils, each having a phase coil input terminal and a phase coil output terminal, which constitute each of the phases among the plurality of phase coils, with each phase coil being positioned offset in the circumferential direction from one of the phase coils. Each of the phase coils is composed of a long wire, each having a wire input end and a wire output end, and multiple conductive wires, each extending from the wire input end located at the phase coil input end to the wire output end located at the phase coil output end, bundled together. Each of the phase coils extends in the circumferential direction, starting from the input end of the phase coil, repeatedly curving in a wave-like manner up and down in the axial direction, in the forward direction, then being folded back at a folding section, and extending in the reverse direction, which is the other direction in the circumferential direction, to reach the output end of the phase coil, thus extending in the circumferential direction. A forward axial portion of the phase coil that extends in the axial direction in the forward direction of the phase coil, The portion of the phase coil that extends in the axial direction in the opposite direction of the phase coil, Each extends in an oblique direction that intersects with respect to the axial direction, overlaps with respect to the radial direction perpendicular to the axial direction, and intersects with respect to the oblique direction. At the intersection points where the forward axial portion and the reverse axial portion of one phase coil overlap each other, the positions of the forward axial portion and the reverse axial portion are swapped in the radial direction for each intersection point adjacent in the circumferential direction. In a structure in which the other phase coils are arranged offset in the circumferential direction from one of the phase coils, With respect to the curved portion on one side of one phase coil at one end in the axial direction of one phase coil, the curved portion on one side of the other phase coil, which is the next phase coil on the one side in the circumferential direction, at one end in the axial direction of the other phase coil is located outward in the radial direction. The curved portion on the other side of the phase coil, which is the next curved portion on the other side of the phase coil at the other end in the axial direction of the circumferential direction of the one phase coil, is located radially outward from the curved portion on the other side of the other phase coil, which is the next curved portion on the other end in the axial direction of the one side of the other phase coil, and With respect to the curved portion on one side of the first phase coil at one end in the axial direction of the first phase coil, the curved portion on one side of the other phase coil, which is the next phase coil on the other side facing the first one in the circumferential direction, is located inward in the radial direction, The other phase coil curved portion, which is the curved portion on the other side of the phase coil at the other end of the other side in the axial direction of the next position on the other side of the circumferential direction of the first phase coil, is located radially inward with respect to the other phase coil curved portion, which is the curved portion on the other side of the other phase coil at the other end of the other side in the axial direction of the next position on the other side of the circumferential direction of the other phase coil. It has a structure, The input terminal and output terminal of each of the multiple phase coils are located in close proximity in the circumferential direction, and the folded portion of each of the phase coils is located in close proximity in the circumferential direction to the input terminal and output terminal of each of the phase coils. A rotating electric machine characterized by the following features.

Images