Rotating electrical machine

Abstract

A rotary electric machine is provided, which reduces a potential difference between segment coils arranged in the same slot and improves a space factor of coils in the slot. In a rotary electric machine (10), segment coils (80) of the same phase among three-phase coils (24) are each inserted three into an outer peripheral side of a set of slots (22s) that are adjacent in a circumferential direction among a plurality of slots (22s), and are each inserted three into an inner peripheral side of another set of slots (22s) that are shifted by one slot (22s) in the circumferential direction with respect to the set of slots (22s), and the U-phase coil (40), the V-phase coil (50), and the W-phase coil (60) each have an inner winding portion in a first layer and a second layer, the inner winding portion has an outer peripheral layer connection portion Ro connected in a manner that the segment coils (80) are circumferentially surrounded, and with respect to a connection order of the segment coils (80) from an input terminal (70) side of each phase, a connection to the segment coils (80) inserted into a third layer and a fourth layer is later than the outer peripheral layer connection portion Ro in the inner winding portion.

Description

Technical Field

[0001] The present invention relates to a rotary electric motor comprising a distributed three-phase coil in which six segmented coils are inserted into each slot of a stator core having multiple slots. Background Technology

[0002] Rotary motors with distributed three-phase coils are known, wherein six coils are inserted into each slot of a stator core having multiple slots. For example, this is described in Patent Document 1. In the rotary motor described in Patent Document 1, the stator is manufactured, for example, by pre-preparing a mesh-like coil without welded portions, and then expanding the coil on the inner circumference of the stator core and inserting it into the slot. This manufacturing method requires large manufacturing equipment. Furthermore, since the coil is expanded on the inner circumference of the stator core and inserted into the slot, the opening on the inner circumference of the slot needs to be expanded circumferentially. This easily reduces the duty cycle of the coil within the slot. Here, "duty cycle" refers to the ratio [%] of the total cross-sectional area of ​​the metal portion of the coil to the effective cross-sectional area of ​​the slot. Additionally, when the rotary motor is operating, the coil vibrates within the slot, which may degrade NV (Noise Vibration) performance.

[0003] [Existing Technical Documents]

[0004] [Patent Literature]

[0005] Patent Document 1: Japanese Patent Application Publication No. 2023-74145

[0006] [The problem the invention aims to solve]

[0007] However, compared to the rotary motor described in Patent Document 1, in order to improve the duty cycle and suppress the reduction in NV performance, a method is considered for winding a distributed three-phase coil using segmented coils having a pair of arms and a connecting portion that connects the roots of these arms to each other. For example, in the method using segmented coils, after inserting segmented coils into multiple slots respectively, one end of the front end of a pair of arms of the segmented coils inserted into different slots is welded to each other, thereby winding the three-phase coil. In this method using segmented coils, it is effective to thin the insulating film of the segmented coils to further improve the duty cycle, but the thickness of the insulating film needs to be set according to the potential difference between the segmented coils arranged in the same slot. That is, the smaller the potential difference between the segmented coils arranged in the same slot, the thinner the insulating film of the segmented coils can be, thereby improving the duty cycle. Summary of the Invention

[0008] The present invention was made against the background of the above situation, and its object is to provide a rotary motor that can reduce the potential difference between segmented coils arranged in the same slot and increase the duty cycle of the coils in the slot.

[0009] [Methods used to solve problems]

[0010] The subject of the first invention is a rotary electric motor comprising: a stator core, which is a cylindrical shape extending along an axial direction and has a plurality of slots; distributed wound three-phase coils, formed by inserting six segmented coils into each of the plurality of slots and welding one end of a pair of arms of the segmented coils inserted into different slots to each other, the segmented coils having the pair of arms and a connecting portion, the connecting portion connecting the roots of the pair of arms to each other; and a rotor disposed on the inner circumference of the stator core, characterized in that: (a) the number of slots is six times the number of poles of the rotor; (b) when the insertion positions of the six segmented coils inserted into each of the plurality of slots are set as a first layer, a second layer, a third layer, a fourth layer, a fifth layer, and a sixth layer from the outer circumference to the inner circumference, the segmented coils of the same phase in the three-phase coils are located on the outer circumference of a group of slots adjacent in the circumferential direction from the first layer to the sixth layer. Three are inserted in each of the third layers, and three are inserted in each of the inner circumferential sides of another set of slots offset by one slot relative to the first set of slots in the circumferential direction from the fourth layer to the sixth layer. (c) Each phase coil of the three-phase coil has: an inward coil portion connected to the segmented coil from the outer circumferential side toward the inner circumferential side; and an outward coil portion connected to the segmented coil from the inner circumferential side toward the outer circumferential side; and a connecting portion connecting the end of the inner circumferential side of the inward coil portion to the end of the inner circumferential side of the outward coil portion. (d) The inward coil portion and the outward coil portion each have an outer circumferential layer connecting portion connected in the first layer and the second layer in such a way that the segmented coils are circumferentially wrapped around each other. (e) Regarding the connection order of the segmented coils from the input terminal side of the phase coil, the connection of the segmented coils inserted into the third layer and the connection of the segmented coils inserted into the fourth layer are after the outer circumferential layer connecting portion in the inward coil portion.

[0011] The main idea of ​​the second invention is that, in the first invention, the inward-rolling portion and the outward-rolling portion respectively have: an inner peripheral layer connecting portion, which connects the fifth layer and the sixth layer in such a way that the segmented coil is wrapped around the periphery; an intermediate layer connecting portion, which connects the third layer and the fourth layer in such a way that the segmented coil is wrapped around the periphery; an outer peripheral layer side transfer portion, which connects the end of the outer peripheral layer connecting portion to the end of the intermediate layer connecting portion; and an inner peripheral layer side transfer portion, which connects the end of the inner peripheral layer connecting portion to the end of the intermediate layer connecting portion.

[0012] The main point of the third invention is that, in the second invention, the outer peripheral layer connecting portion, the middle layer connecting portion, and the inner peripheral layer connecting portion in the involute portion each have the same orientation along the circumferential direction.

[0013] The main point of the fourth invention is that, in the second or third invention, in each of the inner circumferential layer connecting portion, the intermediate layer connecting portion, and the inner circumferential layer connecting portion, the orientation of the segmented coil in the inner roll portion along the circumferential direction is opposite to that of the segmented coil in the outer roll portion along the circumferential direction.

[0014] The fifth invention is that, in any of the second to fourth inventions, (a) in the outer peripheral layer connecting portion and the inner peripheral layer connecting portion, the number of slots in the circumferential direction of the segmented coil on the connecting portion side and the front end side is 6; (b) in the intermediate layer connecting portion, the number of slots in the circumferential direction of the segmented coil on the connecting portion side and the front end side is 5 and 7 respectively; (c) in the outer peripheral layer side transfer portion and the inner peripheral layer side transfer portion, the number of slots in the circumferential direction of the segmented coil on either the connecting portion side or the front end side is 6.

[0015] The essence of the sixth invention is that, in any of the first to fifth inventions, in a plurality of slots, the winding start position of the outer peripheral layer connecting portion of the inner winding portion of the phase coil is respectively set at a predetermined position, the predetermined position being predetermined in such a way that the maximum value of the voltage difference between the segmented coil of different phases inserted into the third layer and the segmented coil inserted into the fourth layer in the same slot becomes lower.

[0016] The main point of the seventh invention is that, in any of the first to sixth inventions, (a) the three-phase coil is Y-connected, (b) two parallel-connected first coil parts and second coil parts are respectively provided between the input terminal and the neutral point of the phase coil, and (c) the connection structure of the segmented coils in the phase coil is the same in each phase.

[0017] The essence of the eighth invention is that, in the seventh invention, the segmented coils of the three-phase coils, in the first coil section and the second coil section, are connected in the same order from the input terminal side of the phase coils and inserted into the slots adjacent in the circumferential direction.

[0018] The main point of the ninth invention is that, in any of the first to sixth inventions, (a) the three-phase coil is Y-connected, (b) a coil portion is provided between the input terminal and the neutral point of each phase coil, (c) each phase coil has two inner coil portions, two outer coil portions and two connecting portions, and (d) the connection structure of the segmented coils in each phase is the same.

[0019] The essence of the tenth invention is that, in the ninth invention, with respect to the phase coils of the three-phase coils, (a) in each of the two inner coils, the segmented coils connected in the same order from the input terminal side are inserted into the slots adjacent in the circumferential direction, and (b) in each of the two outer coils, the segmented coils connected in the same order from the input terminal side are inserted into the slots adjacent in the circumferential direction.

[0020] [Invention Effects]

[0021] According to the rotating motor of the first invention, (a) the number of slots is six times the number of poles of the rotor, (b) when the insertion positions of the segmented coils into which six are respectively inserted into the plurality of slots are set as a first layer, a second layer, a third layer, a fourth layer, a fifth layer, and a sixth layer from the outer periphery to the inner periphery, the segmented coils of the same phase in the three-phase coils are inserted three times each from the first layer to the third layer on the outer periphery of a group of slots that are circumferentially adjacent in the plurality of slots, and three times each from the fourth layer to the sixth layer on the inner periphery of another group of slots that are circumferentially offset from the first group of slots, (c) the three-phase wires Each phase coil in the coil has an inwardly wound portion connected to the segmented coil from the outer periphery to the inner periphery, an outwardly wound portion connected to the segmented coil from the inner periphery to the outer periphery, and a connecting portion connecting the inner periphery end of the inwardly wound portion to the inner periphery end of the outwardly wound portion. (d) The inwardly wound portion and the outwardly wound portion each have an outer periphery layer connecting portion connected in the first layer and the second layer in a manner in which the segmented coil is circumferentially wrapped around them. (e) Regarding the connection sequence of the segmented coils connected from the input terminal side of the phase coil, the connection to the segmented coil inserted into the third layer and the connection to the segmented coil inserted into the fourth layer follow the outer periphery layer connecting portion of the inwardly wound portion. In a three-phase coil, when the segmented coils of the same phase in the same slot are adjacent, the greater the difference in the connection sequence of these adjacent segmented coils from the common input terminal side, the greater the voltage applied between these adjacent segmented coils. In a three-phase coil, when the segmented coils of different phases are adjacent in the same slot, the smaller the total number of connections of these adjacent segmented coils from the input terminal side of each phase, the greater the voltage applied between these adjacent segmented coils. In this invention, the maximum voltage difference between adjacent segmented coils in the same slot is the case where the segmented coils of different phases are adjacent in the same slot of a three-phase coil. According to the structure described in (b), the case where the segmented coils of different phases are adjacent in the same slot is the case where the segmented coil inserted into the third layer is adjacent to the segmented coil inserted into the fourth layer. According to the structures described in (c) to (e), regarding the connection sequence of the segmented coils from the input terminal side of each phase, the connection of the segmented coil inserted into the third layer is after the outer peripheral layer connection of the inward-wound portion. Similarly, regarding the connection sequence of the segmented coils from the input terminal side of each phase, the connection of the segmented coil inserted into the fourth layer is after the outer peripheral layer connection of the inward-wound portion. Therefore, the impedance between the segmented coil inserted into the adjacent third layer and the segmented coil inserted into the fourth layer is reduced according to the number of segmented coils connected to the outer peripheral layer connection part of the in-wound portion when viewed from the input terminal side of each phase.Therefore, in the cases of structures (c) to (e), compared to cases where this is not the case, the maximum value of the impedance between adjacent segmented coils of different phases within the same slot decreases. When the maximum value of the impedance decreases, the maximum value of the voltage difference between adjacent segmented coils of different phases within the same slot also decreases. Therefore, the insulation film of the segmented coils can be thinned, thereby increasing the duty cycle. This, for example, allows for a reduction in the size of the rotating electric machine while maintaining the same performance, or an improvement in the performance of the rotating electric machine while maintaining the same size.

[0022] According to the rotary motor of the second invention, in the first invention, the inner winding portion and the outer winding portion each have: an inner circumferential layer connecting portion, connected to the fifth and sixth layers in such a way that the segmented coils wrap around the periphery; an intermediate layer connecting portion, connected to the third and fourth layers in such a way that the segmented coils wrap around the periphery; an outer circumferential layer side transfer portion, connecting the end of the outer circumferential layer connecting portion and the end of the intermediate layer connecting portion; and an inner circumferential layer side transfer portion, connecting the end of the inner circumferential layer connecting portion and the end of the intermediate layer connecting portion. Thus, the inner winding portion and the outer winding portion each have an outer circumferential layer connecting portion, an intermediate layer connecting portion, an inner circumferential layer connecting portion, an outer circumferential layer side transfer portion, and an inner circumferential layer side transfer portion. Therefore, by appropriately increasing or decreasing the number of slots in the circumferential direction of the outer circumferential layer connecting portion, the intermediate layer connecting portion, and the inner circumferential layer connecting portion, a three-phase coil with a distribution winding corresponding to six times the number of poles of the rotor, i.e., the number of slots, can be easily constructed.

[0023] According to the rotary motor of the third invention, in the second invention, the outer peripheral layer connecting portion, the middle layer connecting portion, and the inner peripheral layer connecting portion in the inward winding portion all have the same circumferential orientation. When the outer peripheral layer connecting portion, the middle layer connecting portion, and the inner peripheral layer connecting portion in the inward winding portion all have the same circumferential orientation, compared to a case where this is not the case, the circumferential bending direction of the segmented coil can be unified to the same value in the outer peripheral layer connecting portion, the middle layer connecting portion, and the inner peripheral layer connecting portion. Therefore, the bending and welding processes of the segmented coil become repetitive, and the workability of the three-phase coil winding process is improved.

[0024] According to the rotary motor of the fourth invention, in the second or third invention, in each of the inner circumferential layer connecting portion, the intermediate layer connecting portion, and the inner circumferential layer connecting portion, the orientation of the segmented coil in the inner winding portion along the circumferential direction is opposite to that of the segmented coil in the outer winding portion. This allows for a simple structure where the inner and outer winding portions form a double helix. For example, the bending and welding processes of the segmented coils become repetitive, and the workability of the three-phase coil winding process is improved.

[0025] According to the rotary motor of the fifth invention, in any one of the second to fourth inventions, (a) in the outer peripheral layer connecting portion and the inner peripheral layer connecting portion, the number of slots in the circumferential direction of the segmented coil on the connecting portion side and the front end side is 6; (b) in the intermediate layer connecting portion, the number of slots in the circumferential direction of the segmented coil on the connecting portion side and the front end side is 5 and 7 respectively; (c) in the outer peripheral layer side transfer portion and the inner peripheral layer side transfer portion, the number of slots in the circumferential direction of the segmented coil on either the connecting portion side or the front end side is 6. Using the segmented coil with the structure of (a) to (c), three segmented coils of the same phase coils in the three-phase coil are inserted on the outer peripheral side of each of a group of slots that are circumferentially adjacent in the plurality of slots, and three are inserted on the inner peripheral side of each of another group of slots that are circumferentially offset by one slot relative to one group of slots. In addition, the types of segmented coils with different numbers of slots in the circumferential direction on the connecting part side and different numbers of slots in the circumferential direction on the front end side are limited.

[0026] According to the sixth invention of the rotary electric machine, in any of the first to fifth inventions, in each of the plurality of slots, the winding start position of the outer peripheral layer connecting portion in the inward roll portion of the phase coil is set at a predetermined position, in a manner that reduces the maximum value of the voltage difference between the segmented coils of different phases inserted into the third layer and the segmented coils inserted into the fourth layer in the same slot. By setting the winding start position of the outer peripheral layer connecting portion in the inward roll portion of the phase coil at predetermined positions, the maximum value of the voltage difference between the segmented coils of different phases inserted into the third layer and the segmented coils inserted into the fourth layer in the same slot is further reduced. As a result, the insulating film of the segmented coil can be made thinner, thus increasing the duty cycle, for example, reducing the volume of the rotary electric machine while maintaining the same performance, or improving the performance of the rotary electric machine while maintaining the same volume.

[0027] According to the rotary motor of the seventh invention, in any of the first to sixth inventions, (a) the three-phase coils are Y-connected, (b) two parallel-connected first coil sections and second coil sections are respectively provided between the input terminals and the neutral point of the phase coils, and (c) the connection structure of the segmented coils within the phase coils is identical in each phase. Thus, by ensuring that the connection structure of the segmented coils in each phase coil is identical, a simpler structure is achieved compared to situations where this is not the case, avoiding complex connection structures. For example, the bending and welding processes of the segmented coils become repetitive, and the workability of the three-phase coil winding process is improved.

[0028] According to the rotary motor of the eighth invention, in the seventh invention, regarding the phase coils of the three-phase coils, in the first coil section and the second coil section, the segmented coils with the same connection order from the input terminal side of the phase coil are inserted into adjacent slots in the circumferential direction. By inserting the segmented coils with the same connection order from the input terminal side in the first coil section and the second coil section into adjacent slots in the circumferential direction, the connection structure of the first coil section and the second coil section is identical to that of each other. In this way, when the connection structure of the first coil section and the second coil section is identical to that of each other, the complexity of the connection structure can be avoided, resulting in a simpler structure compared to a situation where this is not the case. For example, the bending and welding processes of the segmented coils become repetitive, and the workability of the winding process of the three-phase coils is further improved.

[0029] According to the rotary electric machine of the ninth invention, in any one of the first to sixth inventions, (a) the three-phase coils are Y-connected, (b) a coil portion is provided between the input terminal and the neutral point of each phase coil, (c) each phase coil has two inward coil portions, two outward coil portions, and two connecting portions, and (d) the connection structure of the segmented coils within each phase coil is identical to that of each phase. According to the structure in (c), when the three-phase coils are Y-connected, it is easy to achieve commonality of the segmented coils between a method in which one phase coil is connected in series between the input terminal and the neutral point of each phase coil and a method in which two phase coils are connected in parallel.

[0030] According to the rotary motor of the tenth invention, in the ninth invention, regarding the phase coils of the three-phase coils, (a) in each of the two inner winding portions, the segmented coils connected in the same order from the input terminal side are inserted into adjacent slots in the circumferential direction; and (b) in each of the two outer winding portions, the segmented coils connected in the same order from the input terminal side are inserted into adjacent slots in the circumferential direction. Thus, by inserting segmented coils connected in the same order from the input terminal side in each of the two inner winding portions into adjacent slots in the circumferential direction, the connection structure of the two inner winding portions is identical to that of each other. By inserting segmented coils connected in the same order from the input terminal side in each of the two outer winding portions into adjacent slots in the circumferential direction, the connection structure of the two outer winding portions is identical to that of each other. Thus, when the connection structures of the two inner winding portions and the two outer winding portions are identical to each other, compared to cases where this is not the case, the complexity of the connection structure is avoided, resulting in a simpler structure. For example, the bending and welding processes of the segmented coils become repetitive, and the workability of the winding process of the three-phase coils is improved. Attached Figure Description

[0031] Figure 1This is a schematic diagram illustrating a cross-section obtained by cutting the rotary electric motor of the present invention along its axial direction.

[0032] Figure 2 These are schematic diagrams illustrating the method of winding a three-phase coil into the stator core of a rotating electric motor according to Embodiment 1 of the present invention. (a) is a perspective view of the stator core, (b) is a perspective view of the segmented coil, (c) is a diagram showing the state in which a segmented coil is inserted into a slot of the stator core and unfolded along the circumference of the stator core, viewed from the inner circumference side, and (d) is a diagram showing the state in which a pair of arms of multiple segmented coils are respectively inserted into slots of the stator core and the front ends of the pair of arms of the segmented coils respectively inserted into different slots are welded together and connected, unfolded along the circumference of the stator core, viewed from the inner circumference side, and viewed from the outer circumference side.

[0033] Figure 3 This is an electrical equivalent circuit diagram of a three-phase coil wound on the stator core of a rotating electric motor according to Embodiment 1 of the present invention.

[0034] Figure 4 It is an explanation of the composition Figure 3 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram of the arrangement of the segmented coils. (b) is an explanatory diagram of the insertion positions of the segmented coils in the first coil section and the second coil section of the U-phase coil. (c) is a schematic diagram illustrating the connection structure of the U-phase coil.

[0035] Figure 5 It is an explanation of the composition Figure 4 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil, and (b) is a diagram illustrating the detailed connection structure of the U-phase coil.

[0036] Figure 6 This is to explain in order to constitute Figure 4 The diagram shows the types of segmented coils used in three-phase coils.

[0037] Figure 7 This means that in Figure 5 The diagrams shown are of the maximum voltage difference between adjacent segmented coils in the same slot in a three-phase coil. (a) is a diagram illustrating the relationship between the voltage difference between adjacent segmented coils and the connection order of the segmented coils from the input terminal side. (b) is a diagram showing the voltage difference between adjacent segmented coils. (c) is a diagram showing the connection order of the segmented coils from the input terminal side and the voltage difference between adjacent segmented coils when segmented coils of different phases are adjacent in the same slot.

[0038] Figure 8 This means that in Figure 5The diagram shows the positional relationship of adjacent segmented coils within the three-phase coil when they are adjacent to each other in the same slot.

[0039] Figure 9 The diagrams illustrate the connection structure of the segmented coils constituting the three-phase coil of Comparative Example 1. (a) is a diagram showing the arrangement of the segmented coils, (b) is a diagram showing the general connection structure of the U-phase coil, and (c) is a diagram showing the types of segmented coils used to constitute the three-phase coil.

[0040] Figure 10 This means that in Figure 9 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0041] Figure 11 This is a configuration diagram of the segmented coils of the three-phase coil wound on the stator core of the rotating electric motor in Embodiment 2 of the present invention.

[0042] Figure 12 It is an explanation of the composition Figure 11 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil. (b) is a diagram illustrating the detailed connection structure of the U-phase coil. (c) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0043] Figure 13 This means that in Figure 12 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0044] Figure 14 This is a configuration diagram of the segmented coils of the three-phase coil wound on the stator core of the rotating electric machine according to Embodiment 3 of the present invention.

[0045] Figure 15 It is an explanation of the composition Figure 14 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil. (b) is a diagram illustrating the detailed connection structure of the U-phase coil. (c) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0046] Figure 16 This means that in Figure 15 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0047] Figure 17 This is a diagram showing the configuration of the segmented coils of the three-phase coil wound on the stator core of the rotating electric motor according to Embodiment 4 of the present invention.

[0048] Figure 18 It is an explanation of the composition Figure 17 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil. (b) is a diagram illustrating the detailed connection structure of the U-phase coil. (c) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0049] Figure 19 This means that in Figure 18 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0050] Figure 20 This is a configuration diagram of the segmented coils of the three-phase coil wound on the stator core of the rotating electric machine according to Embodiment 5 of the present invention.

[0051] Figure 21 It is an explanation of the composition Figure 20 The diagrams shown are of the connection structure of the segmented coils of a three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil, and (b) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0052] Figure 22 This means that in Figure 21 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0053] Figure 23 The diagram illustrates the connection structure of the segmented coils of the three-phase coil wound on the stator core of the rotating electric machine according to Embodiment 6 of the present invention. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil, and (b) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0054] Figure 24 This is an electrical equivalent circuit diagram of a three-phase coil wound on the stator core of a rotating electric motor according to Embodiment 7 of the present invention.

[0055] Figure 25 It is an explanation of the composition Figure 24 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram of the configuration of the segmented coils, and (b) is a diagram illustrating the connection structure of the U-phase coil.

[0056] Figure 26 It is an explanation of the composition Figure 25 The diagrams shown are of the connection structure of the segmented coils of the three-phase coil. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil. (b) is a diagram illustrating the detailed connection structure of the U-phase coil. (c) is a diagram illustrating the types of segmented coils used to construct the three-phase coil.

[0057] Figure 27 This means that in Figure 26 The diagrams shown are of the maximum voltage difference between adjacent segmented coils in the same slot in a three-phase coil. (a) is a diagram showing the relationship between the voltage difference between adjacent segmented coils and the connection order of the segmented coils from the input terminal side. (b) is a diagram showing the voltage difference between adjacent segmented coils. (c) is a diagram showing the connection order of each phase of the segmented coil from the input terminal side and the voltage difference between adjacent segmented coils when segmented coils of different phases are adjacent in the same slot.

[0058] Figure 28 This means that in Figure 26 The diagram shows the positional relationship of adjacent segmented coils within the three-phase coil when they are adjacent to each other in the same slot.

[0059] Figure 29 The diagrams illustrate the connection structure of the segmented coils constituting the three-phase coil of Comparative Example 2. (a) is a diagram showing the arrangement of the segmented coils, (b) is a diagram showing the connection structure of the U-phase coil, and (c) is a diagram showing the types of segmented coils used to constitute the three-phase coil.

[0060] Figure 30 This means that in Figure 29 The graph shown represents the maximum voltage difference between adjacent segmented coils in the same slot within a three-phase coil.

[0061] Label Explanation

[0062] 10, 110, 210, 310, 410, 510, 610 Rotary motor; 22: Stator core; 22s: Slot; 24, 124, 224, 324, 424, 524, 624: Three-phase coils; 30: Rotor; 40, 140, 240, 340, 440, 540: U-phase coils (phase coils); 42, 52, 62, 142, 152, 162, 242, 252, 262 342, 352, 362, 442, 452, 462: First coil section; 42a, 44a, 52a, 54a, 62a, 64a, 142a, 144a, 152a, 154a, 162a, 164a, 242a, 244a, 252a, 254a, 262a, 264a, 342a, 344a, 352a, 354a, 362a, 364a, 442a 444a, 452a, 454a, 462a, 464a, 542a, 544a, 552a, 554a, 562a, 564a, 640a, 640c, 650a, 650c, 660a, 660c: involute; 42b, 44b, 52b, 54b, 62b, 64b, 142b, 144b, 152b, 154b, 162b, 164b, 242b 244b, 252b, 254b, 262b, 264b, 342b, 344b, 352b, 354b, 362b, 364b, 442b, 444b, 452b, 454b, 462b, 464b, 542b, 544b, 552b, 554b, 562b, 564b, 640b, 640d, 650b, 650d, 660b, 660d: Outer curl section;44, 54, 64, 144, 154, 164, 244, 254, 264, 344, 354, 364, 444, 454, 464: Second coil section; 50, 150, 250, 350, 450, 550: V-phase coil (phase coil); 60, 160, 260, 360, 460, 560: W-phase coil (phase coil); 72: U-phase terminal (input terminal); 74: V-phase terminal (input terminal); 76: W-phase terminal (input terminal); 80: Segmented coil; 82: A pair of arms; 82t: Front end; 84: Connecting part; 640: U-phase coil (phase coil, coil section); 650 V-phase coil (phase coil, coil section), 660: W-phase coil (phase coil, coil section), A1, B1, C1, D1: Inward winding start position (winding start position), A2, B2, C2, D2: Inward winding end position (end of the inner circumferential side of the inward winding section), A3, B3, C3, D3: Outward winding start position (end of the inner circumferential side of the outward winding section), CL: Axis, Ji1, Ji2, Ji3, Ji4, Ji5, Ji6: Inner circumferential end connection part (connection part), N: Neutral point, Ri: Inner circumferential layer connection part, Rm: Intermediate layer connection part, Ro: Outer circumferential layer connection part, SWi: Inner circumferential layer side transition part, SWo: Outer circumferential layer side transition part; Detailed Implementation

[0063] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in each embodiment, the drawings are appropriately simplified or modified, and the dimensions and shapes of the parts may not be accurately depicted. In this specification, "direction parallel to axis CL," "radial direction centered on axis CL," and "circumferential direction centered on axis CL" are abbreviated as "axis CL direction," "radial direction," and "circumferential direction," respectively.

[0064] [Example 1]

[0065] Figure 1 This is a schematic diagram illustrating the cross-section obtained by cutting the rotary motor 10 of the present invention along the axis CL direction.

[0066] The rotary motor 10 is, for example, an electric motor used as a power source for driving in hybrid vehicles or electric vehicles. The rotary motor 10 includes: a cylindrical stator core 22, on which multiple electromagnetic steel plates are stacked and extend along the axis CL; and a rotor 30 disposed on the inner circumference of the stator core 22. Multiple slots, or multiple slots 22s, are provided on the inner circumferential surface of the stator core 22 (see reference). Figure 2 The plurality of slots have a depth in a direction toward the radial outer periphery centered on the axis CL and extend along the axis CL. Teeth 22t are formed between adjacent slots 22s (see reference). Figure 2Three-phase coils 24 are wound in each slot 22s. The stator core 22 and the three-phase coils 24 constitute the stator 20. The rotor 30 is, for example, a known embedded magnet type, and the number of poles of the rotor 30 is determined. In addition, the number of poles of the rotor 30 is a multiple of 2; in this embodiment, the number of poles of the rotor 30 is 4.

[0067] Figure 2 These are schematic diagrams illustrating the method of winding the three-phase coil 24 of the rotary motor 10 of Embodiment 1 of the present invention into the stator core 22. (a) is a perspective view of the stator core 22, (b) is a perspective view of the segmented coil 80, (c) is a diagram showing the state in which a segmented coil 80 is inserted into the slot 22s of the stator core 22, unfolded along the circumference of the stator core 22 and viewed from the inner circumference, and (d) is a diagram showing the state in which a pair of arms 82 of a plurality of segmented coils 80 are respectively inserted into the slot 22s of the stator core 22, and one of the front ends 82t of the pair of arms 82 of the segmented coils 80 respectively inserted into these different slots 22s is welded to each other and connected.

[0068] In this embodiment, the number of slots 22s is six times the number of poles of rotor 30, i.e., 24 (=4×6). Figure 2 In (a), the number of slots 22s is omitted and represented as 12.

[0069] like Figure 2 As shown in (b), the segmented coil 80 is constructed, for example, of a structure in which an insulating film such as enamel is formed on the surface of a so-called flat conductor with a rectangular cross-section, such as a long strip conductor plate. The segmented coil 80 is bent into a roughly U-shape. The segmented coil 80 has a pair of arms 82 extending in a straight line in the same direction on the left and right sides of the U-shape, and a connecting portion 84 connecting the roots of the pair of arms 82 to each other. The insulating film is removed from the front ends 82t of both arms 82.

[0070] First, such as Figure 2 As shown in (c), a pair of arms 82 are inserted into the slot 22s from one end 22a side of the stator core 22 toward the other end 22b side. One end 22a of the stator core 22 is one end of the stator core 22 in the direction of the axis CL, and the other end 22b of the stator core 22 is the other end of the stator core 22 in the direction of the axis CL. Thus, the connecting part 84 is positioned on the side of one end 22a. In addition, the front ends 82t of the pair of arms 82 protrude from the other end 22b respectively.

[0071] Next, as Figure 2As shown in (d), the front ends 82t of a pair of arms 82 of the segmented coil 80 are bent circumferentially. Furthermore, one side of the front ends 82t of a pair of arms 82 in one segmented coil 80 is welded to one side of the front ends 82t of a pair of arms 82 in another segmented coil 80. That is, in the segmented coils 80 that are respectively inserted into multiple slots 22s, the front ends 82t of a pair of arms 82 of the segmented coils 80 that are respectively inserted into different slots 22s are welded to each other. In this way, the front ends 82t of multiple segmented coils 80 are electrically connected to each other by welding, thereby forming a three-phase coil 24 wound around the toothed portion 22t. In the three-phase coil 24, the portion formed by welding the front ends 82t of multiple segmented coils 80 together is the welded portion 88. The welding is, for example, TIG (Tungsten Inert Gas) welding. It should be noted that... Figure 2 This is a conceptual explanation. In reality, multiple segmented coils 80 are inserted into the slots 22s in a circular shape, and a three-phase coil 24 is formed by welding these multiple segmented coils 80 together. It should be noted that six segmented coils 80 are inserted into each of the multiple slots 22s.

[0072] Figure 3 This is an electrical equivalent circuit diagram of the three-phase coil 24 wound on the stator core 22 of the rotary motor 10 in Embodiment 1 of the present invention.

[0073] The three-phase coil 24 is Y-connected. The three-phase coil 24 is the coil for each phase of the U-phase coil 40, V-phase coil 50, and W-phase coil 60. The U-phase coil 40, V-phase coil 50, and W-phase coil 60 are respectively equivalent to "phase coils" in this invention. The U-phase terminal 72 is the input terminal for inputting three-phase AC to the U-phase coil 40 (U phase). The V-phase terminal 74 is the input terminal for inputting three-phase AC to the V-phase coil 50 (V phase). The W-phase terminal 76 is the input terminal for inputting three-phase AC to the W-phase coil 60 (W phase). Hereinafter, unless otherwise specified, the U-phase coil 40, V-phase coil 50, and W-phase coil 60 will be abbreviated as "phase coils." Unless otherwise specified, the U-phase terminal 72, V-phase terminal 74, and W-phase terminal 76 will be referred to as "input terminals 70." The U-phase terminal 72, V-phase terminal 74, and W-phase terminal 76 are equivalent to "input terminals" in this invention. One end of the U-phase coil 40 is connected to the U-phase terminal 72, and the other end is connected to the neutral point N. One end of the V-phase coil 50 is connected to the V-phase terminal 74, and the other end is connected to the neutral point N. One end of the W-phase coil 60 is connected to the W-phase terminal 76, and the other end is connected to the neutral point N. The U-phase coil 40 has two parallel-connected first coil sections 42 and second coil sections 44 between the U-phase terminal 72 and the neutral point N. The V-phase coil 50 has two parallel-connected first coil sections 52 and second coil sections 54 between the V-phase terminal 74 and the neutral point N. The W-phase coil 60 has two parallel-connected first coil sections 62 and second coil sections 64 between the W-phase terminal 76 and the neutral point N. Thus, each phase coil of the three-phase coil 24 has one end connected to the input terminal 70 of the respective phase, and the other end connected to the neutral point N, with two parallel-connected first coil sections and second coil sections between the input terminal 70 of each phase and the neutral point N.

[0074] Here, the positions where the segmented coils 80 in the first coil section 42 of the U-phase coil 40 are inserted into the slot 22s, from the U-phase terminal 72 side toward the neutral point N, are sequentially designated as insertion positions U1a, U2a, U3a, U4a, ..., U23a, U24a. The positions where the segmented coils 80 in the second coil section 44 of the U-phase coil 40 are inserted into the slot 22s, from the U-phase terminal 72 side toward the neutral point N, are sequentially designated as insertion positions U1b, U2b, U3b, U4b, ..., U23b, U24b. The positions where the segmented coils 80 in the first coil section 52 of the V-phase coil 50 are inserted into the slot 22s, from the V-phase terminal 74 side toward the neutral point N, are sequentially designated as insertion positions V1a, V2a, V3a, V4a, ..., V23a, V24a. The segmented coils 80 in the second coil section 54 of the V-phase coil 50 are inserted into slots 22s, and the positions from the V-phase terminal 74 side toward the neutral point N are sequentially labeled as insertion positions V1b, V2b, V3b, V4b, ..., V23b, V24b. The segmented coils 80 in the first coil section 62 of the W-phase coil 60 are inserted into slots 22s, and the positions from the W-phase terminal 76 side toward the neutral point N are sequentially labeled as insertion positions W1a, W2a, W3a, W4a, ..., W23a, W24a. The segmented coils 80 in the second coil section 64 of the W-phase coil 60 are inserted into slots 22s, and the positions from the W-phase terminal 76 side toward the neutral point N are sequentially labeled as insertion positions W1b, W2b, W3b, W4b, ..., W23b, W24b. The initial characters U, V, and W in these insertion position markings indicate that they are segmented coils 80 that constitute U-phase coil 40, V-phase coil 50, and W-phase coil 60, respectively. The numerical part indicates the connection sequence from the input terminal 70 side of each phase toward the neutral point N. The final characters a and b indicate that "a" represents the first coil section and "b" represents the second coil section.

[0075] Figure 4 It is an explanation of the composition Figure 3 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 24 is as follows: (a) is a configuration diagram of the segmented coils 80; (b) is an explanatory diagram of the allocation of the insertion positions of the segmented coils 80 of the first coil section 42 and the second coil section 44 in the U-phase coil 40; and (c) is a schematic diagram illustrating the connection structure of the U-phase coil 40. Figure 5 It is an explanation of the composition Figure 4The diagrams showing the connection structure of the segmented coils 80 of the three-phase coil 24 are shown in (a) and (b). (a) illustrates the overall structure of the connection structure of the three-phase coil 24, while (b) illustrates the detailed connection structure of the U-phase coil 40. "Connection structure" refers to the physical configuration of the multiple segmented coils 80 constituting the three-phase coil 24. Specifically, "connection structure" refers to the relative positional relationship of the insertion positions of the individual segmented coils 80 within the coil to which the multiple segmented coils 80 are connected, and the connection relationship between their front ends 82t.

[0076] Figure 4 The slot numbers S1 to S24 indicate the circumferential positions of the 24 slots 22s. The insertion positions of the radially segmented coils 80, from the outer circumference to the inner circumference, are designated as the first, second, third, fourth, fifth, and sixth layers. Six segmented coils 80 are inserted into each of the 24 slots 22s. Figure 4 As shown in (a), three segmented coils 80 of the same phase in the three-phase coil 24 are inserted from the first to the third layer on the outer periphery of each of the 24 slots 22s that are adjacent in the circumferential direction, and three are inserted from the fourth to the sixth layer on the inner periphery of another set of slots 22s that are offset from one set of slots 22s in the circumferential direction. Figure 4 In (a), the insertion positions of the segmented coils 80 in phase, i.e., one set of slots 22s and another set of slots 22s, are indicated by a thick solid line. Hereinafter, each region of the shape enclosed by this thick solid line will be referred to as a "phase insertion unit". The insertion positions of the segmented coils 80 constituting the three-phase coil 24 are indicated by determining the slot numbers S1 to S24 and the first to sixth layers indicating the radial position, respectively. For example, the insertion positions U1a, U2a, U3a, U4a, ..., U23a, U24a of the segmented coil 80 in the first coil section 42 of the U-phase coil 40 into the slots 22s are indicated by determining any one of the slot numbers S1 to S24 indicating the circumferential position and any one of the first to sixth layers indicating the radial position, respectively.

[0077] In the circumferential direction, a phase V in-phase insertion unit is arranged adjacent to a phase V insertion unit. In the circumferential direction, a phase W insertion unit is arranged adjacent to a phase V insertion unit. In the circumferential direction, a phase U insertion unit is arranged adjacent to a phase W insertion unit. Thus, phase U, phase V, and phase W insertion units are arranged adjacently and repeatedly in the circumferential direction.

[0078] In the in-phase insertion units of each phase (U, V, and W), insertion positions for the segmented coil 80 of the first coil section and the segmented coil 80 of the second coil section are respectively assigned. These assignments are identical in the in-phase insertion units of each phase. Therefore, the following description will representatively illustrate the assignment of the insertion positions of the segmented coil 80 of the first coil section 42 and the segmented coil 80 of the second coil section 44 in the in-phase insertion unit of the U-phase coil 40, omitting descriptions of other phases.

[0079] exist Figure 4 In (b), from Figure 4 (a) The insertion positions of the segmented coils 80 of the V-phase coil 50 and W-phase coil 60 are omitted; only the insertion position of the segmented coil 80 of the U-phase coil 40 is shown. Furthermore, to easily distinguish the insertion positions of the segmented coils 80 of the first coil section 42 and the second coil section 44, the insertion position of the segmented coil 80 of the second coil section 44 is indicated using reversed white and black characters. For example... Figure 4 As shown in (b), within each in-phase insertion unit, in each of the first to sixth layers, the insertion positions of the segmented coil 80 of the first coil section 42 and the segmented coil 80 of the second coil section 44 are adjacent in the circumferential direction. In each in-phase insertion unit, regarding the slot 22s where only the segmented coil 80 of the U-phase coil 40 is inserted, one of the insertion positions of the segmented coil 80 of the first coil section 42 and the segmented coil 80 of the second coil section 44 is the first, third, fourth, and sixth layers, and the other is the second and fifth layers. In two in-phase insertion units that are adjacent to each other in the circumferential direction, in each of the first to sixth layers, the insertion positions of the segmented coil 80 of the first coil section 42 and the segmented coil 80 of the second coil section 44 are respectively circumferentially opposite.

[0080] like Figure 4 and Figure 5 As shown in the attached drawing, the V-phase coil 50 is a structure in which the connection structure of the segmented coils 80 constituting the U-phase coil 40 is offset to the left in the circumferential direction by a spacing of 4 between the slots 22s, and the connection structure itself is the same. Similarly, the W-phase coil 60 is obtained by offsetting the connection structure of the segmented coils 80 constituting the U-phase coil 40 to the left in the circumferential direction by a spacing of 8 between the slots 22s, and the connection structure itself is the same. Furthermore, in the first coil section 42 and the second coil section 44 of the U-phase coil 40, the segmented coils 80 connected in the same order from the U-phase terminal 72 side are inserted into adjacent slots 22s in the circumferential direction. Therefore, the connection structure of the segmented coils 80 constituting the first coil section 42 will be described representatively below, with descriptions of other connection structures appropriately omitted. Additionally, "spacing of slots 22s" (hereinafter abbreviated as "spacing") refers to the circumferential interval, indicating how many times the spacing between adjacent slots 22s in the circumferential direction is between them.

[0081] exist Figure 4 In (c), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the front end 82t side, i.e. the welding part 88 side. Figure 5 Similarly, for example, a pair of arms 82 of segmented coil 80 are inserted into the first layer of slot S1 and the first layer of slot S8, respectively, and a pair of arms 82 of segmented coil 80 are inserted into the second layer of slot S14 and the first layer of slot S20, respectively. Furthermore, a U-phase terminal 72 is connected to the front end 82t inserted into the first layer of slot S1, and the front end 82t inserted into the first layer of slot S8 and the front end 82t inserted into the second layer of slot S14 are electrically connected by soldering.

[0082] like Figure 4 (c) and Figure 5 As shown in (b), the first coil section 42 has an outer peripheral end connection section Jo1, an inner coil section 42a, an outer coil section 42b, and an inner peripheral end connection section Ji1 that connects the inner peripheral end of the inner coil section 42a to the inner peripheral end of the outer coil section 42b. The inner coil section 42a is the portion from the outer peripheral side connected to the U-phase terminal 72 toward the inner peripheral side to which the segmented coil 80 is connected. The outer coil section 42b is the portion from the inner peripheral side toward the outer peripheral side connected to the neutral point N to which the segmented coil 80 is connected. The phrase "from the outer peripheral side toward the inner peripheral side" in the inner coil section 42a means that the connection of the segmented coil 80 starts from the first layer and ends at the sixth layer, and does not exclude the cases where, as with the outer peripheral layer connection section Ro, the intermediate layer connection section Rm, and the inner peripheral layer connection section Ri described later, the connection is made from the second layer to the first layer, from the fourth layer to the third layer, or from the sixth layer to the fifth layer. The phrase "from the inner periphery to the outer periphery" in the outer coil 42b means that the connection of the segmented coil 80 generally starts from the sixth layer and ends at the first or second layer. It does not exclude the possibility that, as described later in the outer periphery layer connection section Ro, the intermediate layer connection section Rm, and the inner periphery layer connection section Ri, the connection may be made from the first layer to the second layer, from the third layer to the fourth layer, or from the fifth layer to the sixth layer.

[0083] The inward-rolling portion 42a and the outward-rolling portion 42b each have an outer peripheral layer connecting portion Ro, an outer peripheral layer side transfer portion SWo, an intermediate layer connecting portion Rm, an inner peripheral layer side transfer portion SWi, and an inner peripheral layer connecting portion Ri. The outer peripheral layer connecting portion Ro is a portion in which segmented coils 80 are alternately inserted at the positions of the first and second layers and connected in a circumferential manner. The intermediate layer connecting portion Rm is a portion in which segmented coils 80 are alternately inserted at the positions of the third and fourth layers and connected in a circumferential manner. The inner peripheral layer connecting portion Ri is a portion in which segmented coils 80 are alternately inserted at the positions of the fifth and sixth layers and connected in a circumferential manner. The outer peripheral layer side transfer portion SWo is a portion that connects the second layer, which is the end of the outer peripheral layer connecting portion Ro, to the third layer, which is the end of the intermediate layer connecting portion Rm. The inner peripheral layer side transfer portion SWi is a portion that connects the fifth layer, which is the end of the inner peripheral layer connecting portion Ri, and the fourth layer, which is the end of the intermediate layer connecting portion Rm. In the outer peripheral layer connection section Ro, one end is connected to the U-phase terminal 72, and the other end is connected to the intermediate layer connection section Rm via the outer peripheral layer side transfer section SWo. In the inner peripheral layer connection section Ri, one end is connected to the inner peripheral end connection section Ji1, and the other end is connected to the intermediate layer connection section Rm via the inner peripheral layer side transfer section SWi.

[0084] The inward roll start position A1 is the insertion position of one of the locations in the outer peripheral layer connecting portion Ro of the inward roll portion 42a where the segmented coil 80 is initially connected from one of the first and second layers to the other. The inward roll start position A1 corresponds to the "winding start position" in this invention. Specifically, in the drawings, the inward roll start position A1 is the first layer from the slot number S1, which is connected to the U-phase terminal 72 via the outer peripheral end connecting portion Jo1, offset to the left by a spacing of 7 from slot number S8. The inward roll end position A2 is the insertion position of the sixth layer in the inner peripheral layer connecting portion Ri of the inward roll portion 42a, where the segmented coil 80 is finally connected at the fifth to sixth layer position. The outward roll start position A3 is the insertion position of the sixth layer in the inner peripheral layer connecting portion Ri of the outward roll portion 42b, where the segmented coil 80 is initially connected at the sixth to fifth layer position. The inward roll end position A2 corresponds to the "end point on the inner peripheral side of the inward roll portion" in this invention. The outward roll start position A3 corresponds to the "end point on the inner peripheral side of the outward roll portion" in this invention. The outer winding end position A4 is the insertion position of the other side of the part in the outer peripheral layer connecting part Ro of the outer winding part 42b where the segmented coil 80 is connected from one of the first layer and the second layer to the other.

[0085] The outer peripheral end connection part Jo1 is a portion in which a segmented coil 80 is disposed between the U-phase terminal 72 and the inward roll start position A1, and is a portion that connects the first layers of segmented coils 80 inserted into each other. Specifically, it is a portion that connects the first layer of slot number S1 to the first layer of slot number S8. The inner peripheral end connection part Ji1 is a portion in which a segmented coil 80 is disposed between the inward roll end position A2 and the outward roll start position A3.

[0086] The outer peripheral end connecting part Jo2, the inner winding part 44a, the outer winding part 44b and the inner peripheral end connecting part Ji2 in the second coil part 44 have the same structure as the outer peripheral end connecting part Jo1, the inner winding part 42a, the outer winding part 42b and the inner peripheral end connecting part Ji1 in the first coil part 42.

[0087] The inward roll start position B1 is the insertion position of one of the locations in the outer peripheral layer connecting portion Ro of the inward roll portion 44a where the segmented coil 80 is initially connected from one of the first and second layers to the other. The inward roll start position B1 corresponds to the "winding start position" in this invention. Specifically, in the drawings, the inward roll start position B1 is the first layer, offset to the left by slot number S7, which is 5 spaces from slot number S2, where the U-phase terminal 72 is connected via the outer peripheral end connecting portion Jo2. The inward roll end position B2 is the insertion position of the sixth layer in the inner peripheral layer connecting portion Ri of the inward roll portion 44a, where the segmented coil 80 is finally connected at the fifth to sixth layer position. The outward roll start position B3 is the insertion position of the sixth layer in the inner peripheral layer connecting portion Ri of the outward roll portion 44b, where the segmented coil 80 is initially connected at the sixth to fifth layer position. The inward roll end position B2 corresponds to the "end point on the inner peripheral side of the inward roll portion" in this invention. The outward roll start position B3 corresponds to the "end point on the inner peripheral side of the outward roll portion" in this invention. The outer winding end position B4 is the insertion position of the other side of the part in the outer peripheral layer connecting part Ro of the outer winding section 44b where the segmented coil 80 is connected from one side of the fifth and sixth layers to the other. The inner peripheral end connecting part Ji2 is the part where the segmented coil 80 is arranged between the inner winding end position B2 and the outer winding start position B3.

[0088] The outer peripheral end connecting portion Jo1, the inward curl portion 52a, the outward curl portion 52b, and the inner peripheral end connecting portion Ji1 that connects their inner peripheral ends to each other in the first coil portion 52 are structures corresponding to the outer peripheral end connecting portion Jo1, the inward curl portion 42a, the outward curl portion 42b, and the inner peripheral end connecting portion Ji1 that connects their inner peripheral ends to each other in the first coil portion 42. The outer peripheral end connecting portion Jo2, the inward curl portion 54a, the outward curl portion 54b, and the inner peripheral end connecting portion Ji2 that connects their inner peripheral ends to each other in the second coil portion 54 are structures corresponding to the outer peripheral end connecting portion Jo2, the inward curl portion 44a, the outward curl portion 44b, and the inner peripheral end connecting portion Ji2 that connects their inner peripheral ends to each other in the second coil portion 44. The outer peripheral end connecting portion Jo1, the inward curl portion 62a, the outward curl portion 62b, and the inner peripheral end connecting portion Ji1 that connects their inner peripheral ends to each other in the first coil portion 62 are structures corresponding to the outer peripheral end connecting portion Jo1, the inward curl portion 42a, the outward curl portion 42b, and the inner peripheral end connecting portion Ji1 that connects their inner peripheral ends to each other in the first coil portion 42. The outer peripheral end connecting portion Jo2, the inward curl portion 64a, the outward curl portion 64b, and the inner peripheral end connecting portion Ji2 that connects their inner peripheral ends to each other in the second coil portion 64 are structures corresponding to the outer peripheral end connecting portion Jo2, the inward curl portion 44a, the outward curl portion 44b, and the inner peripheral end connecting portion Ji2 that connects their inner peripheral ends to each other in the second coil portion 44.

[0089] The orientation of the segmented coil 80 in the inward roll portion 42a along the circumferential direction is opposite to that of the segmented coil 80 in the outward roll portion 42b along the circumferential direction. Specifically, as... Figure 4 and Figure 5 As shown in the attached figures, the outer peripheral layer connecting portion Ro in the inward-rolled portion 42a winds to the left as in slot numbers S8 (U2a) → S14 (U3a) → S20 (U4a) → S2 (U5a), and the outer peripheral layer connecting portion Ro in the outward-rolled portion 42b winds to the right as in slot numbers S19 (U22a) → S13 (U23a) → S7 (U24a). Similarly, in the attached figures, the middle layer connecting portion Rm in the inward-rolled portion 42a winds to the left, and the middle layer connecting portion Rm in the outward-rolled portion 42b winds to the right. In the attached figures, the inner peripheral layer connecting portion Ri in the inward-rolled portion 42a winds to the left, and the inner peripheral layer connecting portion Ri in the outward-rolled portion 42b winds to the right. Furthermore, the inward-rolled portion 42a and the outward-rolled portion 42b each form a double spiral connecting structure at the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri. "Double spiral" refers to the state in which the two wires connected by the segmented coil 80 form a parallel spiral.

[0090] Regarding the connection sequence of the segmented coils 80 starting from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the third layer is later than the outer peripheral layer connecting portion Ro in the inner roll portion 42a. That is, when viewed from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the third layer is after the outer peripheral layer connecting portion Ro of the inner roll portion 42a has been circumferentially wrapped around, or after the outer peripheral layer connecting portion Ro of the inner roll portion 42a has been circumferentially wrapped around, and further after the inner peripheral layer connecting portion Ri of the outer roll portion 42b has been circumferentially wrapped around. Regarding the connection sequence of the segmented coils 80 starting from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the fourth layer is later than the outer peripheral layer connecting portion Ro in the inner roll portion 42a. That is, when viewed from the U-phase terminal 72 side, the connection to the segmented coil 80 inserted into the fourth layer is made after the outer peripheral layer connecting portion Ro of the inward-curled portion 42a is circumferentially wrapped around it, or after the outer peripheral layer connecting portion Ro of the inward-curled portion 42a is circumferentially wrapped around it and then the inner peripheral layer connecting portion Ri of the outward-curled portion 42b is circumferentially wrapped around it. Thus, when viewed from the U-phase terminal 72 side, both the connection to the segmented coil 80 inserted into the third layer and the connection to the segmented coil 80 inserted into the fourth layer are made after the outer peripheral layer connecting portion Ro of the inward-curled portion 42a is circumferentially wrapped around it.

[0091] Figure 6 This is to explain in order to constitute Figure 4 The diagram shows the types of segmented coils 80 used in the three-phase coil 24.

[0092] In the outer peripheral layer connecting part Ro and the inner peripheral layer connecting part Ri, on the side of the connecting part 84 of the segmented coil 80 ( Figure 4 , Figure 5 (shown as dashed line side) and welded part 88 side ( Figure 4 , Figure 5 The spacing between the solid lines shown is 6. In the intermediate layer connection portion Rm, the spacing between the connecting portion 84 and the welding portion 88 of the segmented coil 80 is 5 on the welding portion 88 side and 7 on the connecting portion 84 side. The spacing between the outer peripheral layer transfer portion SWo and the inner peripheral layer transfer portion SWi on the connecting portion 84 side of the segmented coil 80 is 6. The spacing between the two pairs of arms 82 inserted into the segmented coil 80 of the first layer and the two pairs of arms 82 inserted into the segmented coil 80 of the sixth layer on the connecting portion 84 side of the segmented coil 80 is 5 and 7 respectively.

[0093] Figure 7 This means that in Figure 5The diagrams shown are of the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s in the three-phase coil 24. (a) is a diagram showing the relationship between the voltage difference between adjacent segmented coils 80 and the connection order of the segmented coils 80 from the input terminal 70 side. (b) is a diagram showing the voltage difference between adjacent segmented coils 80. (c) is a diagram showing the connection order of the segmented coils 80 from the input terminal 70 side and the voltage difference between adjacent segmented coils 80 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0094] like Figure 7 As shown in (a), adjacent segmented coils 80 within the same slot 22s are alternately arranged circumferentially in slots 22s where only six segmented coils 80 of the same phase are inserted and slots 22s where three segmented coils 80 of different phases are inserted. Figure 7 In (a), the adjacent insertion positions of segmented coils 80 of different phases within the same slot 22s are displayed with black and white reverse characters.

[0095] The following uses Figure 3 The voltage difference between adjacent segmented coils 80 within the same slot 22s will be explained. When the rotary motor 10 is driven to rotate, three-phase AC voltages are applied to the U-phase terminal 72, V-phase terminal 74, and W-phase terminal 76 respectively. Regarding the voltage difference between adjacent segmented coils 80 within the same slot 22s, there are cases between the segmented coils 80 of the U-phase coil 40, between the segmented coils 80 of the V-phase coil 50, between the segmented coils 80 of the W-phase coil 60, between the segmented coils 80 of the U-phase coil 40 and the V-phase coil 50, between the segmented coils 80 of the V-phase coil 50 and the W-phase coil 60, and between the segmented coils 80 of the W-phase coil 60 and the U-phase coil 40. The voltage difference can be calculated using different methods depending on whether the segmented coils 80 are in the same phase or in different phases. Therefore, the situation between the segmented coils 80 of the U-phase coil 40 and between the segmented coils 80 of the U-phase coil 40 and the segmented coils 80 of the V-phase coil 50 will be described in a representative manner.

[0096] For ease of understanding, the following explanation will be simplified by assuming that the segmented coil 80 wound on the stator core 22 made of electromagnetic steel plate functions as an ideal inductive reactance. That is, with respect to the segmented coil 80, both the resistive and capacitive reactance components are sufficiently small compared to the inductive reactance component and are negligible. Furthermore, when multiple segmented coils 80 are connected, the inductive reactance components of the portions 84 and 88 of the segmented coils 80 are the same. Here, the impedance that serves as the inductive reactance between the U-phase terminal 72 and the V-phase terminal 74 is defined as impedance Z1 [Ω].

[0097] Between the U-phase terminal 72 and the neutral point N, a total of 23 locations are alternately provided on the connection portion 84 side of the segmented coil 80 and the welding portion 88 side where the front end portion 82t is welded to each other. There are 12 locations on the connection portion 84 side and 11 locations on the welding portion 88 side. The same applies between the V-phase terminal 74 and the neutral point N.

[0098] For example, when a voltage Vo [V] is applied to the U-phase terminal 72 relative to the V-phase terminal 74, a current Io (=Vo / Z1) [A] flows between the U-phase terminal 72 and the V-phase terminal 74. In this case, (1 / 46×Vo) [V] is applied to both the connection portion 84 side and the welding portion 88 side of the segmented coil 80 between the U-phase terminal 72 and the V-phase terminal 74. In the U-phase coil 40, the potential decreases by (1 / 46×Vo) [V] for each additional connection from the U-phase terminal 72 side toward the neutral point N. In the V-phase coil 50, the potential increases by (1 / 46×Vo) [V] for each additional connection from the V-phase terminal 74 side toward the neutral point N.

[0099] First, the case where adjacent segmented coils 80 within the same slot 22s are in phase, for example, a segmented coil 80 with the U-phase coil 40 inserted at connection sequence Nu1 and another segmented coil 80 with the U-phase coil 40 inserted at connection sequence Nu2, will be explained. Connection sequences Nu1 and Nu2 are synonymous with the numerical part at the insertion positions (U1a~U24a, U1b~U24b). In this case, the voltage difference between adjacent segmented coils 80 is obtained by multiplying the difference in connection sequence from the common input terminal, i.e., the U-phase terminal 72 side, toward the neutral point N (=|Nu1-Nu2|) by (1 / 46×Vo) [V]. Furthermore, the maximum value of the difference in connection sequence from the common input terminal 70 side toward the neutral point N for adjacent in-phase segmented coils 80 is the difference between the maximum value (=24) and the minimum value (=1) of the connection sequence, i.e., "23".

[0100] Next, the case where adjacent segmented coils 80 within the same slot 22s are of different phases will be explained, for example, the case where a segmented coil 80 with the insertion position of U-phase coil 40 in connection sequence Nn3 is adjacent to another segmented coil 80 with the insertion position of V-phase coil 50 in connection sequence Nv3. Connection sequence Nn3 is synonymous with the numerical part at the insertion position (U1a~U24a, U1b~U24b), and connection sequence Nv3 is synonymous with the numerical part at the insertion position (V1a~V24a, V1b~V24b). In this case, the total count of the connection portion 84 side and the solder portion 88 side of the segmented coil 80 provided between the insertion position of one segmented coil 80 and the insertion position of the other segmented coil 80 is set as total T. The total count of the portion on the connection portion 84 side and the portion on the solder portion 88 side of the segmented coil 80 connected in series between the insertion position of one segmented coil 80 of U-phase coil 40 and the neutral point N is set as quantity Xu. The total number of the portions on the connection 84 side and the welded portion 88 side of the segmented coil 80 connected in series between the insertion position of another segmented coil 80 of the V-phase coil 50 and the neutral point N is set as number Xv. Number Xv is the same as the total of the portions on the connection 84 side and the welded portion 88 side of the segmented coil 80 connected in series between the U-phase terminal 72 and the neutral point N (= "23"), and the difference {= 23 - (Nu3 - 1)} obtained by subtracting "1" from the connection sequence Nu2 from the insertion position of a segmented coil 80. Number Xv is the same as the total of the portions on the connection 84 side and the welded portion 88 side of the segmented coil 80 connected in series between the V-phase terminal 74 and the neutral point N (= "23"), and the difference {= 23 - (Nv3 - 1)} obtained by subtracting "1" from the connection sequence Nv3 from the insertion position of another segmented coil 80. The total T is the sum of numbers Xu and Xv (=Xu+Xv). Therefore, the total T is the difference between "48" and the sum of connection sequence Nu2 and connection sequence Nv3 {=48-(Nu2+Nv3)}. When one segmented coil 80 of U-phase coil 40 is adjacent to another segmented coil 80 of V-phase coil 50 in the same slot for 22s, the voltage obtained by multiplying the total T by (1 / 46×Vo)[V] becomes the voltage difference between the adjacent segmented coils 80. The same idea can also be used to calculate the voltage difference when segmented coil 80 of V-phase coil 50 is adjacent to segmented coil 80 of W-phase coil 60 in the same slot for 22s, and when segmented coil 80 of W-phase coil 60 is adjacent to segmented coil 80 of U-phase coil 40 in the same slot for 22s.

[0101] return Figure 7For example, the segmented coils 80 inserted into insertion positions U23b and U3a are adjacent in the same slot 22s, but the voltage (=20 / 46×Vo) obtained by multiplying the difference 20 (=23-3) of the connection sequence from the common U-phase terminal 72 side toward the neutral point N by (1 / 46×Vo)[V] becomes the voltage difference between the adjacent segmented coils 80. For example, the segmented coils 80 inserted into insertion positions V6a and U7b are adjacent to each other in the same slot 22s, but the voltage (=35) obtained by subtracting the total of "the connection sequence of the segmented coils 80 inserted into insertion position U7b from the U phase terminal 72 side towards the neutral point N (=7) and the connection sequence of the segmented coils 80 inserted into insertion position V6a from the V phase terminal 74 side towards the neutral point N (=6) (=13)" from "48" and multiplying it by (1 / 46×Vo)[V] becomes the voltage difference between adjacent segmented coils 80.

[0102] Figure 7 (b) is a graph showing the voltage difference between adjacent segmented coils 80 in the same slot 22s, which is the number obtained by dividing each voltage difference by (1 / 46×Vo)[V]. Figure 7 (b) The larger the number, the greater the voltage difference between adjacent segmented coils 80. The voltage difference between the segmented coil 80 inserted into slot S12 (third layer) and the segmented coil 80 inserted into slot S16 (fourth layer) is the maximum voltage difference (=35 / 46×Vo). Figure 7 In (b), the location where the voltage difference between adjacent segmented coils 80 is at its maximum value is indicated by black and white reverse characters. Furthermore, as mentioned above, when segmented coils 80 of the same phase are adjacent in the same slot 22s, the maximum value obtained by dividing the voltage difference between adjacent segmented coils 80 by (1 / 46×Vo)[V] is "23".

[0103] Figure 7 (c) is a diagram showing the connection sequence of each phase of the segmented coil 80 from the input terminal 70 side and the voltage difference between adjacent segmented coils 80 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0104] Figure 8 This means that in Figure 5 The diagram shows the positional relationship of the adjacent segmented coils 80 within the three-phase coil 24 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0105] like Figure 8As shown, two first coil sections 42 and a second coil section 44 are connected in parallel between the U-phase terminal 72 and the neutral point N. The first coil section 42, from the U-phase terminal 72 side toward the neutral point N, consists of an outer peripheral end connection section Jo1, an inner coil section 42a, an inner peripheral end connection section Ji1, and an outer coil section 42b connected in series. The second coil section 44, from the U-phase terminal 72 side toward the neutral point N, consists of an outer peripheral end connection section Jo2, an inner coil section 44a, an inner peripheral end connection section Ji2, and an outer coil section 44b connected in series. If the inner coil section 42a and 44a are configured as a path from the outer peripheral side to the inner peripheral side, then the outer coil section 42b and 44b form a loop from the inner peripheral side to the outer peripheral side. Between the V-phase terminal 74 and the neutral point N, two first coil sections 52 and a second coil section 54 are connected in parallel with the same connection structure. Between the W-phase terminal 76 and the neutral point N, two first coil sections 62 and a second coil section 64 are connected in parallel with the same connection structure.

[0106] In the case where segmented coils 80 of different phases are adjacent within the same slot 22s, these adjacent segmented coils 80 are a combination of segmented coils 80 inserted into the third layer and segmented coils 80 inserted into the fourth layer. Regarding the connection sequence of the segmented coils 80 from the input terminal 70 side of each phase, the connection towards the segmented coils 80 inserted into the third layer is after the outer peripheral layer connection portion Ro in the inward curl of each phase coil. That is, the segmented coils 80 inserted into the third layer are connected after the outer peripheral layer connection portion Ro of the inward curl of each phase coil is circumferentially wound around when viewed from the input terminal 70 side of each phase. Regarding the connection sequence of the segmented coils 80 from the input terminal 70 side of each phase, the connection towards the segmented coils 80 inserted into the fourth layer is after the outer peripheral layer connection portion Ro in the inward curl of each phase coil is circumferentially wound around when viewed from the input terminal 70 side of each phase. Figure 8 In the diagram, dashed arrows indicate the positional relationship of adjacent segmented coils 80 when different phases of the same slot are adjacent within 22s.

[0107] Figure 9These are diagrams illustrating the connection structure of the segmented coils 80 constituting the three-phase coil 824 of Comparative Example 1. (a) is a configuration diagram of the segmented coils 80, (b) is a schematic diagram illustrating the connection structure of the U-phase coil 840, and (c) is a diagram illustrating the types of segmented coils 80 used to constitute the three-phase coil 824. The three-phase coil 824 has a structure substantially the same as the three-phase coil 24 of Embodiment 1 described above, but differs in that it is replaced by U-phase coil 40, V-phase coil 50, and W-phase coil 60, respectively, becoming U-phase coil 840, V-phase coil 850, and W-phase coil 860. In this comparative example, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially common in function with Embodiment 1 are labeled with the same reference numerals and their descriptions are omitted as appropriate.

[0108] like Figure 9 As shown in (a), six segmented coils 80 of the same phase in the three-phase coil 824 are inserted from the first to the sixth layer of one of the 24 slots 22s (in this comparative example, slots 22s with odd-numbered slot numbers). Six more are inserted in the first, third, and fifth layers of one of the adjacent slots 22s in the circumferential direction of that slot 22s, and the second, fourth, and sixth layers of another slot 22s. Figure 9 In (a), the regions where the segmented coil 80 of the same phase is inserted are represented by thick solid lines.

[0109] like Figure 9 As shown in (a), in the attached drawing, the V-phase coil 850 has its connection structure for the segmented coils 80 constituting the U-phase coil 840 offset to the left by a spacing of 4, while the connection structure itself is the same. In the attached drawing, the W-phase coil 860 has its connection structure for the segmented coils 80 constituting the U-phase coil 840 offset to the left by a spacing of 8, while the connection structure itself is the same. Therefore, the following description will representatively focus on the connection structures of the segmented coils 80 constituting the first coil portion 842 and the second coil portion 844 of the U-phase coil 840, omitting descriptions of other connection structures as appropriate.

[0110] like Figure 9As shown in (b), the first coil portion 842 has the following portion on the connecting portion 84 side of the segmented coil 80: the front ends 82t of a pair of segmented coils 80 with both arms 82 inserted into the first layer, a pair of segmented coils 80 with both arms 82 inserted into the second and third layers, and a pair of segmented coils 80 with both arms 82 inserted into the fourth and fifth layers are connected in sequence, forming a sawtooth connection from the outer peripheral side to the inner peripheral side. The first coil portion 842 has the following portion: on the connecting portion 84 side of the segmented coil 80, the front ends 82t of a pair of segmented coils 80 with both arms 82 inserted into the sixth layer, a pair of segmented coils 80 with both arms 82 inserted into the fifth and fourth layers, and a pair of segmented coils 80 with both arms 82 inserted into the third and second layers are connected in sequence, forming a sawtooth connection from the inner peripheral side to the outer peripheral side. Thus, the first coil section 842 is a unit formed by connecting the portion that is serrated from the outer circumference to the inner circumference and the portion that is serrated from the inner circumference to the outer circumference, and this structure is repeated in the circumferential direction. The second coil section 844 has the same structure.

[0111] like Figure 9 As shown in (c), on the welding part 88 side of the segmented coil 80 ( Figure 9 (b) As shown by the solid line side), the number of spacings of the segmented coils 80 inserted into each other in the sixth layer is 7, and the remaining number of spacings of the segmented coils 80 on the welding part 88 side is ( Figure 9 (b) solid line side) and connecting part 84 side ( Figure 9 (b) The dashed side shown is 5. There are two types of segmented coils 80 used to construct the three-phase coil 824.

[0112] Figure 10 This means that in Figure 9 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 824. Figure 10 The value shown is obtained by dividing the voltage difference between adjacent segmented coils 80 in the same slot 22s by (1 / 46×Vo)[V].

[0113] like Figure 10 As shown, the voltage difference between the segmented coil 80 inserted into slot S10 (second layer) and the segmented coil 80 inserted into the third layer, and the voltage difference between the segmented coil 80 inserted into slot S6 (second layer) and the segmented coil 80 inserted into the third layer, are both at their maximum values ​​(=45 / 46×Vo). Figure 10In the diagram, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 reaches its maximum value. In this embodiment, compared to Comparative Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by approximately 22.2% {=1-(35 / 45)}.

[0114] According to this embodiment, (a) the number of slots 22s is six times the number of poles of rotor 30, i.e., 24; (b) when the insertion positions of the segmented coils 80 into each of the 24 slots 22s are set as the first layer, second layer, third layer, fourth layer, fifth layer, and sixth layer from the outer periphery to the inner periphery, the segmented coils 80 of the same phase in the three-phase coils 24 are inserted three times from the first layer to the third layer on the outer periphery of a group of slots 22s that are circumferentially adjacent in the circumferential direction, and three times from the fourth layer to the sixth layer on the inner periphery of another group of slots 22s that are offset by one amount from the circumferential direction relative to a group of slots 22s; (c) the phase coils of each phase in the three-phase coils 24 have: The inward-curling portion (e.g., inward-curling portion 42a) is connected to the segmented coil 80 from the outer peripheral side toward the inner peripheral side; the outward-curling portion (e.g., outward-curling portion 42b) is connected to the segmented coil 80 from the inner peripheral side toward the outer peripheral side; and the inner peripheral end connecting portion (e.g., inner peripheral end connecting portion Ji1) connects the inner peripheral ends of these inward-curling portions and the outward-curling portions to each other. (d) These inward-curling portions and the outward-curling portions have outer peripheral layer connecting portions Ro connected in a manner that surrounds the segmented coil 80 circumferentially in the first layer and the second layer, respectively. (e) Regarding the connection sequence of the segmented coil 80 from the input terminal 70 side of each phase, the connection to the segmented coil 80 inserted into the third layer and the connection to the segmented coil 80 inserted into the fourth layer are later than the outer peripheral layer connecting portions Ro in the inward-curling portion of each phase coil. When segmented coils 80 of the same phase are adjacent in the same slot 22s within the three-phase coil 24, the greater the difference (=|Nu1-Nu2|) in the connection sequence of these adjacent segmented coils 80 from the common input terminal 70 side, the greater the voltage applied between these adjacent segmented coils 80. When segmented coils 80 of different phases are adjacent in the same slot 22s within the three-phase coil 24, the smaller the total (=Nu2+Nv3) in the connection sequence of each phase of these adjacent segmented coils 80 from the input terminal 70 side, the greater the voltage applied between these adjacent segmented coils 80. In this embodiment, the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s is the case where segmented coils 80 of different phases are adjacent in the same slot 22s within the three-phase coil 24. According to the structure described in (b), the case where segmented coils 80 of different phases are adjacent within the same slot 22s becomes the case where segmented coils 80 inserted into the third layer and segmented coils 80 inserted into the fourth layer are adjacent. According to the structures described in (c) to (e), regarding the connection sequence of segmented coils 80 from the input terminal 70 side for each phase, the connection of segmented coils 80 inserted into the third layer is later than the outer peripheral layer connection portion Ro in the inward roll portion of each phase coil. Similarly, regarding the connection sequence of segmented coils 80 from the input terminal 70 side for each phase, the connection of segmented coils 80 inserted into the fourth layer is later than the outer peripheral layer connection portion Ro in the inward roll portion of each phase coil.Therefore, the impedance between the segmented coil 80 inserted into the adjacent third layer and the segmented coil 80 inserted into the fourth layer is reduced based on the number of segmented coils 80 connected to the outer peripheral layer connection portion Ro of the inner winding portion of each phase coil when viewed from the input terminal 70 side of each phase. Therefore, in the case of structures (c) to (e), compared to cases where this is not the case, such as Comparative Example 1, the maximum value of the impedance between adjacent segmented coils 80 of different phases within the same slot 22s is reduced. If the maximum value of the impedance is reduced, the maximum value of the voltage difference between adjacent segmented coils 80 of different phases within the same slot 22s is reduced. Therefore, the insulating film of the segmented coil 80 can be thinned to increase the duty cycle. Therefore, for example, the volume of the rotary motor 10 can be reduced while maintaining the same performance, or the performance of the rotary motor 10 can be improved while maintaining the same volume.

[0115] According to this embodiment, in the first coil section 42, the inner winding section 42a and the outer winding section 42b have an outer peripheral layer connecting section Ro, an inner peripheral layer connecting section Ri, an intermediate layer connecting section Rm, an outer peripheral layer side transfer section SWo that connects the end of the outer peripheral layer connecting section Ro to the end of the intermediate layer connecting section Rm, and an inner peripheral layer side transfer section SWi that connects the end of the inner peripheral layer connecting section Ri to the end of the intermediate layer connecting section Rm. The second coil section 44 of the U-phase coil 40, the first coil section 52 and the second coil section 54 of the V-phase coil 50, and the first coil section 62 and the second coil section 64 of the W-phase coil 60 also have the same connection structure. Therefore, by appropriately increasing or decreasing the number of spacings of the outer peripheral layer connecting section Ro, the intermediate layer connecting section Rm, and the inner peripheral layer connecting section Ri, it is easy to form a three-phase coil 24 with a distribution winding corresponding to six times the number of poles of the rotor 30, i.e., the number of slots 22s. For example, in this embodiment, the number of slots 22s is "24". However, by reducing the number of spacings between the outer peripheral layer connecting part Ro, the middle layer connecting part Rm, and the inner peripheral layer connecting part Ri by 12, a three-phase coil 24 with "2" poles and "12" slots 22s is formed. By increasing the number of spacings between the outer peripheral layer connecting part Ro, the middle layer connecting part Rm, and the inner peripheral layer connecting part Ri by 12, a three-phase coil 24 with "6" poles and "36" slots 22s is formed.

[0116] According to this embodiment, in the U-phase coil 40, the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri in the inward winding portions 42a and 44a all have the same orientation along the circumferential direction. When the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri in the inward winding portions 42a and 44a all have the same orientation along the circumferential direction, compared to a case where this is not the case, the bending direction of the segmented coil 80 can be unified to the same value in the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri. The same applies to the V-phase coil 50 and the W-phase coil 60. Here, "bending direction" refers to the direction in which the front ends 82t of a pair of arms 82 of the segmented coil 80 are bent in both the circumferential and radial directions. Specifically, it is... Figure 5 (a) The direction is shown by the solid line. As a result, the bending and welding processes of the segmented coil 80 become repetitive, and the workability of the winding process of the three-phase coil 24 is improved.

[0117] According to this embodiment, in the first coil section 42, the orientation of the segmented coil 80 in the inward winding section 42a along the circumferential direction is opposite to that of the segmented coil 80 in the outward winding section 42b. Therefore, in the first coil section 42 of the U-phase coil 40, the inward winding section 42a and the outward winding section 42b can have a simple double-helix structure. For example, the bending and welding processes of the segmented coil 80 become repetitive, and the workability of the winding process of the three-phase coil 24 is improved. The same applies to the second coil section 44 of the U-phase coil 40, the first coil section 52 and the second coil section 54 of the V-phase coil 50, and the first coil section 62 and the second coil section 64 of the W-phase coil 60.

[0118] According to this embodiment, in the first coil section 42, (a) in the outer peripheral layer connecting section Ro and the inner peripheral layer connecting section Ri, the spacing between the connecting section 84 side and the welding section 88 side of the segmented coil 80 is 6; (b) in the intermediate layer connecting section Rm, the spacing between the connecting section 84 side and the welding section 88 side of the segmented coil 80 is 7 on the connecting section 84 side and 5 on the welding section 88 side; (c) in the outer peripheral layer side transfer section SWo and the inner peripheral layer side transfer section SWi, the spacing between the connecting section 84 side of the segmented coil 80 is 6. The same applies to the second coil section 44 of the U-phase coil 40, the first coil section 52 and the second coil section 54 of the V-phase coil 50, and the first coil section 62 and the second coil section 64 of the W-phase coil 60. By using the segmented coils 80 with the structures described in (a) to (c), three of the same-phase segmented coils 80 in the three-phase coil 24 are inserted on the outer periphery of each group of slots 22s that are adjacent in the circumferential direction, and three are inserted on the inner periphery of each of another group of slots 22s that are offset by one slot in the circumferential direction relative to the first group of slots 22s. Furthermore, the types of segmented coils 80 used to construct the three-phase coil 24 are limited to those with different spacing numbers on the connecting portion 84 side and on the welding portion 88 side.

[0119] According to this embodiment, (a) the three-phase coil 24 is Y-connected; (b) two first coil sections 42 and second coil sections 44 are provided in parallel between the U-phase terminal 72 and the neutral point N; (c) two first coil sections 52 and second coil sections 54 are provided in parallel between the V-phase terminal 74 and the neutral point N; (d) two first coil sections 62 and second coil sections 64 are provided in parallel between the W-phase terminal 76 and the neutral point N; (e) the connection structures of the segmented coils 80 of the first coil section 42 and second coil section 44 in the U-phase coil 40, the connection structures of the segmented coils 80 of the first coil section 52 and second coil section 54 in the V-phase coil 50, and the connection structures of the segmented coils 80 of the first coil section 62 and second coil section 64 in the W-phase coil 60 are the same. Thus, by ensuring that the connection structures of the segmented coils 80 in each phase coil are the same, a simpler structure is achieved compared to a situation where the connection structures are not identical. For example, the bending and welding processes of segmented coil 80 become repetitive, and the workability of the winding process of three-phase coil 24 is improved.

[0120] According to this embodiment, regarding the phase coils in the three-phase coil 24, in the first coil sections 42, 52, 62 and the second coil sections 44, 54, 64, the segmented coils 80 of each phase of these phase coils, connected in the same order from the input terminal 70 side, are respectively inserted into adjacent slots 22s in the circumferential direction. For example, in the first coil section 42 and the second coil section 44, the segmented coils 80 connected in the same order from the U-phase terminal 72 side are respectively inserted into adjacent slots 22s in the circumferential direction, thereby making the connection structure of the first coil section 42 and the second coil section 44 identical. In this way, when the connection structure of the first coil section 42 and the second coil section 44 is identical, compared to the case where it is not, the complexity of the connection structure can be avoided, resulting in a simpler structure. For example, the bending and welding processes of the segmented coils 80 become repetitive, further improving the workability of the winding process of the three-phase coil 24.

[0121] [Example 2]

[0122] Figure 11 This is a configuration diagram of the segmented coils 80 that constitute the three-phase coils 124 of the stator core 22 of the rotary motor 110 of Embodiment 2 of the present invention. Figure 12 It is an explanation of the composition Figure 11 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 124 includes: (a) a diagram illustrating the overall structure of the connection structure of the three-phase coil 124; (b) a diagram illustrating the detailed connection structure of the U-phase coil 140; and (c) a diagram illustrating the types of segmented coils 80 used to construct the three-phase coil 124. Figure 12 (a) Figure 12 In (b), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side.

[0123] The rotary motor 110 has a structure substantially the same as that of the rotary motor 10 in Embodiment 1 described above, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with U-phase coil 140, V-phase coil 150, and W-phase coil 160, respectively. The U-phase coil 140, V-phase coil 150, and W-phase coil 160 are respectively equivalent to "phase coils" in this invention. The connection structures of the U-phase coil 140, V-phase coil 150, and W-phase coil 160 with those of the U-phase coil 40, V-phase coil 50, and W-phase coil 60 are partially different. Therefore, in this embodiment, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially functionally common with Embodiment 1 are labeled with the same reference numerals and their descriptions are appropriately omitted. In this embodiment, the first coil portion 142, the second coil portion 144, the first coil portion 152, the second coil portion 154, the first coil portion 162, and the second coil portion 164 are structures that correspond to the first coil portion 42, the second coil portion 44, the first coil portion 52, the second coil portion 54, the first coil portion 62, and the second coil portion 64 in embodiment 1, respectively. In this embodiment, the inwardly rolled portions 142a, 144a, 152a, 154a, 162a, 164a, the outwardly rolled portions 142b, 144b, 152b, 154b, 162b, 164b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other are structures corresponding to the inwardly rolled portions 42a, 44a, 52a, 54a, 62a, 64a, the outwardly rolled portions 42b, 44b, 52b, 54b, 62b, 64b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other in Embodiment 1.

[0124] like Figure 12 As shown in (a), in the attached drawing, the V-phase coil 150 has a connection structure in which the segmented coils 80 constituting the U-phase coil 140 are offset to the left by a spacing of 4, and the connection structure itself is the same. In the attached drawing, the W-phase coil 160 has a connection structure in which the segmented coils 80 constituting the U-phase coil 140 are offset to the left by a spacing of 8, and the connection structure itself is the same. In the first coil section 142 and the second coil section 144 of the U-phase coil 140, the segmented coils 80 connected in the same order from the U-phase terminal 72 side are inserted into adjacent slots 22s in the circumferential direction. Therefore, the connection structure of the segmented coils 80 constituting the first coil section 142 will be described representatively below, and the description of other connection structures will be omitted as appropriate.

[0125] like Figure 12 (a) Figure 12 As shown in (b), the first coil portion 142 of the U-phase coil 140 has an inner coil portion 142a, an outer coil portion 142b, and inner circumferential end connecting portions Ji1 and Ji2 that connect the inner circumferential ends to each other.

[0126] The connection structure of the inward-curling portion 142a is largely the same as that of the aforementioned inward-curling portion 42a, but they differ in that the orientation of the intermediate layer connection portion Rm along the circumferential direction is opposite. Specifically, as Figure 12 As shown in (b), in the attached figure, in the inward-curling portion 142a, the outer peripheral layer connecting portion Ro winds to the left, the middle layer connecting portion Rm winds to the right, and the inner peripheral layer connecting portion Ri winds to the left. In the outward-curling portion 142b, the outer peripheral layer connecting portion Ro winds to the right, the middle layer connecting portion Rm winds to the left, and the inner peripheral layer connecting portion Ri winds to the right. Thus, in both the inward-curling portion 142a and the outward-curling portion 142b, the middle layer connecting portion Rm winds in the opposite direction to the outer peripheral layer connecting portion Ro and the inner peripheral layer connecting portion Ri. It should be noted that the inward-curling portion 142a and the outward-curling portion 142b each have a double-spiral connecting structure in the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri.

[0127] In the outer peripheral layer connecting part Ro and the inner peripheral layer connecting part Ri, on the side of the connecting part 84 of the segmented coil 80 ( Figure 12 (a) The side shown by the dashed line) and the side of the welded part 88 ( Figure 12 (a) The spacing of the solid lines shown is 6. In the intermediate layer connection Rm, the spacing of the connecting part 84 and the welding part 88 of the segmented coil 80 is 7 on the welding part 88 side and 5 on the connecting part 84 side. In the outer peripheral layer transfer part SWo and the inner peripheral layer transfer part SWi, the spacing of the connecting part 84 of the segmented coil 80 is 6. The segmented coil 80 inserted into the first layer and the segmented coil 80 inserted into the sixth layer by the pair of arms 82 are both those with a spacing of 5 and 7 on the connecting part 84 side of the segmented coil 80.

[0128] Figure 13 This means that in Figure 12 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 124. Figure 13 It is a graph showing the voltage difference between adjacent segmented coils 80 in the same slot 22s, which is the number obtained by dividing each voltage difference by (1 / 46×Vo)[V].

[0129] like Figure 13 As shown, the voltage difference between the segmented coil 80 inserted into slot S8 (third layer) and the segmented coil 80 inserted into the fourth layer is at its maximum value (=35 / 46×Vo). Figure 13In the diagram, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 is at its maximum. In this embodiment, compared to the aforementioned Comparative Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by approximately 22.2% {=1-(35 / 45)}.

[0130] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0131] [Example 3]

[0132] Figure 14 This is a configuration diagram of the segmented coil 80 of the three-phase coil 224 wound on the stator core 22 of the rotary motor 210 of Embodiment 3 of the present invention. Figure 15 It is an explanation of the composition Figure 14 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 224 is as follows: (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil 224; (b) is a diagram illustrating the detailed connection structure of the U-phase coil 240; and (c) is a diagram illustrating the types of segmented coils 80 used to construct the three-phase coil 224. Figure 15 (a) Figure 15 In (b), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side.

[0133] The rotary motor 210 has a structure substantially the same as that of the rotary motor 10 in Embodiment 1 described above, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with U-phase coil 240, V-phase coil 250, and W-phase coil 260, respectively. The U-phase coil 240, V-phase coil 250, and W-phase coil 260 are respectively equivalent to "phase coils" in this invention. The connection structures of the U-phase coil 240, V-phase coil 250, and W-phase coil 260 with those of the U-phase coil 40, V-phase coil 50, and W-phase coil 60 are partially different. Therefore, in this embodiment, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially functionally common with Embodiment 1 are labeled with the same reference numerals and their descriptions are appropriately omitted. In this embodiment, the first coil section 242, the second coil section 244, the first coil section 252, the second coil section 254, the first coil section 262, and the second coil section 264 are structures that correspond to the first coil section 42, the second coil section 44, the first coil section 52, the second coil section 54, the first coil section 62, and the second coil section 64 in embodiment 1, respectively. In this embodiment, the inwardly rolled portions 242a, 244a, 252a, 254a, 262a, 264a, the outwardly rolled portions 242b, 244b, 252b, 254b, 262b, 264b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other are structures corresponding to the inwardly rolled portions 42a, 44a, 52a, 54a, 62a, 64a, the outwardly rolled portions 42b, 44b, 52b, 54b, 62b, 64b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other in Embodiment 1.

[0134] like Figure 15 As shown in (a), in the attached drawing, the V-phase coil 250 has a connection structure in which the segmented coils 80 constituting the U-phase coil 240 are offset to the left by a spacing of 4, and the connection structure itself is the same. In the attached drawing, the W-phase coil 260 has a connection structure in which the segmented coils 80 constituting the U-phase coil 240 are offset to the left by a spacing of 8, and the connection structure itself is the same. In the first coil section 242 and the second coil section 244 of the U-phase coil 240, the segmented coils 80 connected in the same order from the U-phase terminal 72 side are inserted into adjacent slots 22s in the circumferential direction. Therefore, the connection structure of the segmented coils 80 that typically constitute the first coil section 242 will be described below, and the description of other connection structures will be omitted as appropriate.

[0135] like Figure 15 (a) Figure 15 As shown in (b), the first coil portion 242 of the U-phase coil 240 has an inner coil portion 242a, an outer coil portion 242b, and inner circumferential end connecting portions Ji1 and Ji2 that connect the inner circumferential ends to each other.

[0136] The connection structure of the inward-rolling portion 242a is largely the same as that of the aforementioned inward-rolling portion 42a, but the difference lies in the fact that the orientation of the inner peripheral layer connecting portion Ri along the circumferential direction is opposite. Specifically, as Figure 15 As shown in (b), in the attached figure, in the inward roll portion 242a, the outer peripheral layer connecting portion Ro rotates to the left, the middle layer connecting portion Rm rotates to the left, and the inner peripheral layer connecting portion Ri rotates to the right. In the outward roll portion 242b, the outer peripheral layer connecting portion Ro rotates to the right, the middle layer connecting portion Rm rotates to the right, and the inner peripheral layer connecting portion Ri rotates to the left. Thus, in both the inward roll portion 242a and the outward roll portion 242b, the inner peripheral layer connecting portion Ri rotates in the opposite direction to the outer peripheral layer connecting portion Ro and the middle layer connecting portion Rm. It should be noted that the inward roll portion 242a and the outward roll portion 242b have double helical connecting structures in the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri, respectively.

[0137] like Figure 15 As shown in (c), the type of segmented coil 80 used in this embodiment to form the three-phase coil 224 is the same as that in the aforementioned embodiment 1.

[0138] Figure 16 This means that in Figure 15 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 224. Figure 16 It is a graph showing the voltage difference between adjacent segmented coils 80 in the same slot 22s, which is the number obtained by dividing each voltage difference by (1 / 46×Vo)[V].

[0139] The voltage difference between the segmented coil 80 inserted into slot S12 (third layer) and the segmented coil 80 inserted into slot S16 (fourth layer) is at its maximum value (=35 / 46×Vo). Figure 16 In the diagram, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 reaches its maximum value. In this embodiment, compared to the aforementioned Comparative Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by 22.2% {=1-(35 / 45)}.

[0140] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0141] [Example 4]

[0142] Figure 17This is a configuration diagram of the segmented coil 80 of the three-phase coil 324 wound on the stator core 22 of the rotary motor 310 of Embodiment 4 of the present invention. Figure 18 It is an explanation of the composition Figure 17 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 324 includes (a) an overall diagram illustrating the connection structure of the three-phase coil 324, (b) a detailed diagram illustrating the connection structure of the U-phase coil 340, and (c) a diagram illustrating the types of segmented coils 80 used to construct the three-phase coil 324. Figure 18 (a) Figure 18 In (b), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side.

[0143] The rotary motor 310 has a structure substantially the same as that of the rotary motor 10 in Embodiment 1 described above, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with U-phase coil 340, V-phase coil 350, and W-phase coil 360, respectively. The U-phase coil 340, V-phase coil 350, and W-phase coil 360 are respectively equivalent to "phase coils" in this invention. The connection structures of the U-phase coil 340, V-phase coil 350, and W-phase coil 360 with those of the U-phase coil 40, V-phase coil 50, and W-phase coil 60 are partially different. Therefore, in this embodiment, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially functionally common with Embodiment 1 are labeled with the same reference numerals and their descriptions are appropriately omitted. In this embodiment, the first coil section 342, the second coil section 344, the first coil section 352, the second coil section 354, the first coil section 362, and the second coil section 364 are structures that correspond to the first coil section 42, the second coil section 44, the first coil section 52, the second coil section 54, the first coil section 62, and the second coil section 64 in Embodiment 1, respectively. In this embodiment, the inwardly rolled portions 342a, 344a, 352a, 354a, 362a, 364a, the outwardly rolled portions 342b, 344b, 352b, 354b, 362b, 364b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other are structures corresponding to the inwardly rolled portions 42a, 44a, 52a, 54a, 62a, 64a, the outwardly rolled portions 42b, 44b, 52b, 54b, 62b, 64b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other in Embodiment 1.

[0144] like Figure 18As shown in (a), in the attached drawing, the V-phase coil 350 has a connection structure in which the segmented coil 80 constituting the U-phase coil 340 is offset to the left by a spacing of 4, and the connection structure itself is the same. In the attached drawing, the W-phase coil 360 has a connection structure in which the segmented coil 80 constituting the U-phase coil 340 is offset to the left by a spacing of 8, and the connection structure itself is the same. In the first coil section 342 and the second coil section 344 of the U-phase coil 340, the segmented coils 80 connected in the same order from the U-phase terminal 72 side are inserted into adjacent slots 22s in the circumferential direction. Therefore, the connection structure of the segmented coil 80 that typically constitutes the first coil section 342 will be described below, and the description of other connection structures will be omitted as appropriate.

[0145] like Figure 18 (a) Figure 18 As shown in (b), the first coil portion 342 of the U-phase coil 340 has an inner coil portion 342a, an outer coil portion 342b, and inner circumferential end connecting portions Ji1 and Ji2 that connect the inner circumferential ends to each other.

[0146] The connection structure of the inward-wound portion 342a is largely the same as that of the aforementioned inward-wound portion 42a, but the U-phase coil 340 differs in that it does not have the outer peripheral end connection portions Jo1 and Jo2 as in Embodiment 1. Specifically, as Figure 18 As shown in (b), the outer peripheral layer connection Ro starts from the first layer connected to the U-phase terminal 72 and immediately wraps around the second layer in the circumferential direction, that is, there is no segmented coil 80 connecting the first layers to each other.

[0147] In the outer peripheral layer connecting part Ro and the inner peripheral layer connecting part Ri, on the side of the connecting part 84 of the segmented coil 80 ( Figure 18 (a) The side shown by the dashed line) and the side of the welded part 88 ( Figure 18 (a) The spacing of the solid lines shown is 6. In the intermediate layer connection portion Rm, the spacing of the connecting portion 84 side and the welding portion 88 side of the segmented coil 80 is 7 on the welding portion 88 side and 5 on the connecting portion 84 side. In the outer peripheral layer side transfer portion SWo and the inner peripheral layer side transfer portion SWi, the spacing of the welding portion 88 side of the segmented coil 80 is 6. In this embodiment, there is no segmented coil 80 with a pair of arms 82 inserted into the first layer and no segmented coil 80 with a pair of arms 82 inserted into the sixth layer.

[0148] Figure 19 This means that in Figure 18 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 324. Figure 19It is a graph showing the voltage difference between adjacent segmented coils 80 in the same slot 22s, which is the number obtained by dividing each voltage difference by (1 / 46×Vo)[V].

[0149] The voltage difference between the segmented coil 80 inserted into slot S12 (third layer) and the segmented coil 80 inserted into slot S16 (fourth layer) is at its maximum value (=37 / 46×Vo). Figure 19 In the diagram, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 is at its maximum. In this embodiment, compared to the aforementioned Comparative Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by approximately 17.7% {=1-(37 / 45)}.

[0150] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0151] [Example 5]

[0152] Figure 20 This is a configuration diagram of the segmented coil 80 of the three-phase coil 424 wound on the stator core 22 of the rotary motor 410 of Embodiment 5 of the present invention. Figure 21 It is an explanation of the composition Figure 20 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 424 is shown in (a), which illustrates the overall structure of the connection structure of the three-phase coil 424, and (b), which illustrates the types of segmented coils 80 used to construct the three-phase coil 424. Figure 21 In (a), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side.

[0153] The rotary motor 410 has a structure substantially the same as that of the rotary motor 10 in Embodiment 1 described above, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with U-phase coil 440, V-phase coil 450, and W-phase coil 460, respectively. The U-phase coil 440, V-phase coil 450, and W-phase coil 460 are respectively equivalent to "phase coils" in this invention. The connection structures of the U-phase coil 440 and W-phase coil 460 are the same as those of the U-phase coil 40 and W-phase coil 60, respectively. The connection structure of the V-phase coil 450 is substantially the same as that of the V-phase coil 50, but the inward roll start position A1 of the outer peripheral layer connection portion Ro of the V-phase coil 450 differs from that in Embodiment 1. Therefore, in this embodiment, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially functionally common with Embodiment 1 are labeled with the same reference numerals and their descriptions are appropriately omitted. In this embodiment, the first coil section 442, the second coil section 444, the first coil section 452, the second coil section 454, the first coil section 462, and the second coil section 464 are structures that correspond to the first coil section 42, the second coil section 44, the first coil section 52, the second coil section 54, the first coil section 62, and the second coil section 64 in embodiment 1, respectively. In this embodiment, the inwardly rolled portions 442a, 444a, 452a, 454a, 462a, 464a, the outwardly rolled portions 442b, 444b, 452b, 454b, 462b, 464b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other are structures corresponding to the inwardly rolled portions 42a, 44a, 52a, 54a, 62a, 64a, the outwardly rolled portions 42b, 44b, 52b, 54b, 62b, 64b, and the inner peripheral end connecting portions Ji1 and Ji2 that connect these inner peripheral ends to each other in the aforementioned embodiment 1.

[0154] like Figure 20 and Figure 21 As shown in the attached figure, the V-phase coil 450 is a connection structure in which the connection structure of the segmented coil 80 constituting the U-phase coil 440 is offset to the right by a spacing of 2 from the slot 22s in the circumferential direction, and the insertion position of the first coil part 442 is interchanged with the insertion position of the second coil part 444.

[0155] In this embodiment, the inward roll start position A1 of the first coil portion 442 and the second coil portion 444 in the U-phase coil 440, the inward roll start position A1 of the first coil portion 452 and the second coil portion 454 in the V-phase coil 450, and the inward roll start position A1 of the first coil portion 462 and the second coil portion 464 in the W-phase coil 460 are respectively set at predetermined positions.

[0156] "Prescribed position" is a position predetermined in the design such that the maximum voltage difference between the segmented coil 80 inserted into the third layer and the segmented coil 80 inserted into the fourth layer of different phases within the same slot 22s decreases. "Prescribed position" is equivalent to "prescribed position" in this invention.

[0157] In the aforementioned Embodiment 1, the connection sequence of each phase of the segmented coil 80 from the input terminal 70 side and the voltage difference between adjacent segmented coils 80 are shown when segmented coils 80 of different phases are adjacent within the same slot 22s. Figure 7 (c). In Figure 7 In (c), the insertion positions (V6a, V20a, V21b, V9b, V8a, V18a, V19b, V7b) of the segmented coils 80 of phase V are offset by a distance of 6 relative to the insertion positions (U19b, U7b, U6a, U20a, U21b, U9b, U8a, U18a) of the segmented coils 80 of phase U. That is, in the phase V coil 450, the inward winding start positions A1 of the first coil section 452 and the second coil section 454 are offset by a distance of 6. Similarly, the insertion positions (W20a, W21b, W9b, W8a, W18a, W19b, W7b, W6a) of the W-phase segmented coil 80 relative to the insertion positions (U19b, U7b, U6a, U20a, U21b, U9b, U8a, U18a) of the U-phase segmented coil 80 can be staggered by a distance of 6. That is, in the W-phase coil 460, the inward winding start positions A1 of the first coil section 462 and the second coil section 464 can be staggered by a distance of 6. In this way, from the combination of changing the staggered amount of the inward winding start positions A1 of the U-phase coil 440, V-phase coil 450, and W-phase coil 460 by the distance of 6 in the slot 22s each time, it is possible to pre-determine the combination that minimizes the maximum voltage difference between the segmented coils 80 inserted into the third layer and the segmented coils 80 inserted into the fourth layer of different phases within the same slot 22s. The “prescribed location” is a location that is predetermined in the design.

[0158] like Figure 21 As shown in (b), the type of segmented coil 80 used to form the three-phase coil 424 is the same as that in the aforementioned embodiment 1.

[0159] Figure 22 This means that in Figure 21 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 424. Figure 22 It is a graph showing the voltage difference between adjacent segmented coils 80 in the same slot 22s, which is the number obtained by dividing each voltage difference by (1 / 46×Vo)[V].

[0160] The voltage difference between the segmented coil 80 inserted into slot S8 (third layer) and the segmented coil 80 inserted into slot S20 (fourth layer) is at its maximum value (=33 / 46×Vo). Figure 22 In this example, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 is at its maximum. In this embodiment, compared to the aforementioned Comparative Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by approximately 26.7% {=1-(33 / 45)}. Furthermore, for the aforementioned Example 1, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is also reduced.

[0161] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0162] According to this embodiment, in the 24 slots 22s, the inward roll start positions A1 of the inward roll portions 442a, 444a, 452a, 454a, 462a, and 464a of the U-phase coil 440, V-phase coil 450, and W-phase coil 460 are respectively set at predetermined positions. These predetermined positions are pre-determined such that the maximum voltage difference between the segmented coils 80 inserted into the third layer and the segmented coils 80 inserted into the fourth layer of different phases within the same slot 22s decreases. The inward roll start positions A1 of the inward roll portions 442a, 444a, 452a, 454a, 462a, and 464a of the U-phase coil 440, V-phase coil 450, and W-phase coil 460 are respectively set at predetermined positions, thereby further reducing the maximum voltage difference between the segmented coils 80 inserted into the third layer and the segmented coils 80 inserted into the fourth layer of different phases within the same slot 22s. This allows for a thinner insulating film on the segmented coil 80, thus increasing the duty cycle. For example, it enables a reduction in the volume of the rotary motor 410 while maintaining the same performance, or an improvement in the performance of the rotary motor 410 while maintaining the same volume.

[0163] [Example 6]

[0164] Figure 23 This diagram illustrates the connection structure of the segmented coils 80 of the three-phase coil 524 wound on the stator core 22 of the rotary electric motor 510 of Embodiment 6 of the present invention. (a) is a diagram illustrating the overall structure of the connection structure of the three-phase coil 524, and (b) is a diagram illustrating the types of segmented coils 80 used to construct the three-phase coil 524. Figure 23 In (a), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side.

[0165] The rotary motor 510 has a structure substantially the same as that of the rotary motor 10 in Embodiment 1 described above, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with U-phase coil 540, V-phase coil 550, and W-phase coil 560, respectively. The U-phase coil 540, V-phase coil 550, and W-phase coil 560 are respectively equivalent to "phase coils" in this invention. The connection structures of the U-phase coil 540, V-phase coil 550, and W-phase coil 560 with those of the U-phase coil 40, V-phase coil 50, and W-phase coil 60 are partially different. Therefore, in this embodiment, the description focuses on the parts that differ from Embodiment 1, and the parts that are substantially functionally common with Embodiment 1 are labeled with the same reference numerals and their descriptions are appropriately omitted. In this embodiment, the first coil portion 542, the second coil portion 544, the first coil portion 552, the second coil portion 554, the first coil portion 562, and the second coil portion 564 are structures that correspond to the first coil portion 42, the second coil portion 44, the first coil portion 52, the second coil portion 54, the first coil portion 62, and the second coil portion 64 in embodiment 1, respectively. In this embodiment, the outer peripheral end connecting parts Jo3 and Jo4, the inwardly rolled parts 542a, 544a, 552a, 554a, 562a, 564a, the outwardly rolled parts 542b, 544b, 552b, 554b, 562b, 564b, and the inner peripheral end connecting parts Ji3 and Ji4 that connect these inner peripheral ends to each other are respectively the structures corresponding to the outer peripheral end connecting parts Jo1 and Jo2, the inwardly rolled parts 42a, 44a, 52a, 54a, 62a, 64a, the outwardly rolled parts 42b, 44b, 52b, 54b, 62b, 64b, and the inner peripheral end connecting parts Ji1 and Ji2 that connect these inner peripheral ends to each other in the aforementioned embodiment 1.

[0166] like Figure 23As shown in (a), the outer peripheral end connecting portions Jo3 and Jo4 and the inner peripheral end connecting portions Ji3 and Ji4 of the U-phase coil 540, V-phase coil 550, and W-phase coil 560 are different from the outer peripheral end connecting portions Jo1 and Jo2 and the inner peripheral end connecting portions Ji1 and Ji2 of Embodiment 1, respectively. The inwardly rolled portions 542a, 552a, and 562a have the same connection structure as the inwardly rolled portions 44a, 54a, and 64a in Embodiment 1. The inwardly rolled portions 544a, 554a, and 564a have the same connection structure as the inwardly rolled portions 42a, 52a, and 62a in Embodiment 1. The outwardly rolled portions 542b, 552b, and 562b have the same connection structure as the outwardly rolled portions 42b, 52b, and 62b in Embodiment 1. The outwardly rolled portions 544b, 554b, and 564b have the same connection structure as the outwardly rolled portions 44b, 54b, and 64b in Embodiment 1. Specifically, in the accompanying drawings, the inward roll start position A1 of the inward roll portion 542a is the first layer offset to the left by slot number S7, which is 6 spaces away from slot number S1, where the U-phase terminal 72 is connected via the outer peripheral end connection portion Jo3. The inward roll start position B1 of the inward roll portion 544a is the first layer offset to the left by slot number S8, which is 6 spaces away from slot number S2, where the U-phase terminal 72 is connected via the outer peripheral end connection portion Jo4. In the accompanying drawings, the outward roll start position A3 of the outward roll portion 542b is the sixth layer offset to the right by slot number S18, which is 6 spaces away from slot number S24, which is the inward roll end position A2, via the inner peripheral end connection portion Ji3. The outward roll start position B3 of the outward roll portion 544b is the sixth layer offset to the right by slot number S19, which is 6 spaces away from slot number S1, which is the inward roll end position B2, via the inner peripheral end connection portion Ji4. The outer peripheral end connecting parts Jo3 and Jo4 of the V-phase coil 550 and W-phase coil 560 have the same structure as those of the U-phase coil 540. The inner peripheral end connecting parts Ji3 and Ji4 of the V-phase coil 550 and W-phase coil 560 also have the same structure as those of the U-phase coil 540.

[0167] like Figure 23 As shown in (b), the type of segmented coil 80 used to form the three-phase coil 424 is roughly the same as that in Embodiment 1, but the difference is that on the connecting part 84 side of the segmented coil 80, the number of spacings of the segmented coil 80 with both arms 82 inserted into the first layer and the segmented coil 80 with both arms 82 inserted into the sixth layer are both 6.

[0168] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0169] According to this embodiment, on the connection portion 84 side of the segmented coil 80, the spacing between the segmented coil 80 in which both arms 82 are inserted into the first layer and the segmented coil 80 in which both arms 82 are inserted into the sixth layer are both 6. Therefore, compared to embodiments 1-4, the variety of spacing types of the segmented coil 80 used to construct the three-phase coil 524 can be reduced.

[0170] [Example 7]

[0171] Figure 24 This is an electrical equivalent circuit diagram of the three-phase coil 624 wound on the stator core 22 of the rotary motor 610 of Embodiment 7 of the present invention. The three-phase coil 624 is Y-connected. The three-phase coil 624 is the coil of each phase of the U-phase coil 640, V-phase coil 650, and W-phase coil 660. The U-phase coil 640, V-phase coil 650, and W-phase coil 660 are respectively equivalent to the "phase coils" in the present invention. The rotary motor 610 has a structure that is substantially the same as that of the rotary motor 10 of Embodiment 1, but differs in that it replaces the U-phase coil 40, V-phase coil 50, and W-phase coil 60 with the U-phase coil 640, V-phase coil 650, and W-phase coil 660, respectively. The connection structures of the U-phase coil 640, V-phase coil 650, and W-phase coil 660 with the U-phase coil 40, V-phase coil 50, and W-phase coil 660 are partially different. Therefore, in this embodiment, the description focuses on the parts that are different from those in Embodiment 1, and the parts that are substantially the same in function as those in Embodiment 1 are labeled with the same reference numerals and the description is omitted as appropriate.

[0172] One end of the U-phase coil 640 is connected to the U-phase terminal 72, and the other end is connected to the neutral point N. One end of the V-phase coil 650 is connected to the V-phase terminal 74, and the other end is connected to the neutral point N. One end of the W-phase coil 660 is connected to the W-phase terminal 76, and the other end is connected to the neutral point N. The U-phase coil 640 is a coil section disposed between the U-phase terminal 72 and the neutral point N. The V-phase coil 650 is a coil section disposed between the V-phase terminal 74 and the neutral point N. The W-phase coil 660 is a coil section disposed between the W-phase terminal 76 and the neutral point N. Thus, one end of each of the U-phase coil 640, V-phase coil 650, and W-phase coil 660 is connected to the input terminal 70 of the respective phase, and the other end is connected to the neutral point N, with a coil section disposed between the input terminal 70 and the neutral point N. The U-phase coil 640, V-phase coil 650, and W-phase coil 660 respectively correspond to the "coil section" in this invention.

[0173] Here, the positions of the segmented coils 80 in the U-phase coil 640 inserted into slot 22s from the U-phase terminal 72 side toward the neutral point N are sequentially designated as insertion positions U1, U2, U3, U4, ..., U47, U48. The positions of the segmented coils 80 in the V-phase coil 650 inserted into slot 22s from the V-phase terminal 74 side toward the neutral point N are sequentially designated as insertion positions V1, V2, V3, V4, ..., V47, V48. The positions of the segmented coils 80 in the W-phase coil 660 inserted into slot 22s from the W-phase terminal 76 side toward the neutral point N are sequentially designated as insertion positions W1, W2, W3, W4, ..., W47, W48. The initial characters U, V, and W at these insertion positions represent the segmented coils 80 constituting the U-phase coil 640, V-phase coil 650, and W-phase coil 660, respectively, and the numerical part indicates the connection sequence from the input terminal 70 side of each phase toward the neutral point N.

[0174] Figure 25 It is an explanation of the composition Figure 24 The diagrams shown are of the connection structure of the segmented coil 80 of the three-phase coil 624. (a) is a configuration diagram of the segmented coil 80, and (b) is a schematic diagram illustrating the connection structure of the U-phase coil 640. Figure 26 It is an explanation of the composition Figure 25 The diagram showing the connection structure of the segmented coils 80 of the three-phase coil 624 includes: (a) a diagram illustrating the overall structure of the connection structure of the three-phase coil 624; (b) a diagram illustrating the detailed connection structure of the U-phase coil 640; and (c) a diagram illustrating the types of segmented coils 80 used to construct the three-phase coil 624. Figure 25 In (b), the dashed line represents the connecting part 84 side of the segmented coil 80, and the solid line represents the welding part 88 side. Figure 26 The same applies.

[0175] like Figure 25 As shown in the attached diagram, the V-phase coil 650 has its connection structure for the segmented coils 80 constituting the U-phase coil 640 offset to the left by a spacing of 4, while the connection structure itself is the same. Similarly, the W-phase coil 660 has its connection structure for the segmented coils 80 constituting the U-phase coil 640 offset to the left by a spacing of 8, while the connection structure itself is the same. Therefore, the following description will focus on the connection structure of the segmented coils 80 that representatively constitute the U-phase coil 640, omitting descriptions of other connection structures as appropriate.

[0176] The U-phase coil 640 has two outer peripheral end connecting portions Jo5 and Jo6, two inner winding portions 640a and 640c, two outer winding portions 640b and 640d, and two inner peripheral end connecting portions Ji5 and Ji6. The inner winding portions 640a, 640b, 640c, and 640d have the same connection structure as the inner winding portions 42a, 42b, 44a, and 44b in Embodiment 1. The inner winding start position C1 is the insertion position of one of the parts in the outer peripheral layer connecting portion Ro of the inner winding portion 640a where the segmented coil 80 is initially connected from one of the first and second layers to the other. The inner winding start position C1 corresponds to the "winding start position" in this invention. The inner winding end position C2 is the insertion position of the sixth layer in the inner peripheral layer connecting portion Ri of the inner winding portion 640a where the segmented coil 80 is finally connected from the fifth to the sixth layer. The inward roll end position C2 corresponds to the "end point on the inner periphery side of the inward roll portion" in this invention. The outward roll start position C3 is the insertion position of the sixth layer in the inner periphery layer connecting portion Ri of the outward roll portion 640b, where the segmented coil 80 is initially connected at the position of the sixth to fifth layers. The outward roll start position C3 corresponds to the "end point on the inner periphery side of the outward roll portion" in this invention. The outward roll end position C4 is the insertion position of the other side of the portion in the outer periphery layer connecting portion Ro of the outward roll portion 640b where the segmented coil 80 is finally connected from one of the first and second layers to the other. The inward roll start position D1 is the insertion position of the other side of the portion in the outer periphery layer connecting portion Ro of the inward roll portion 640c, where the segmented coil 80 is initially connected from one of the first and second layers to the other. The inward roll end position D2 is the insertion position of the sixth layer in the inner periphery layer connecting portion Ri of the inward roll portion 640c, where the segmented coil 80 is finally connected at the position of the fifth to sixth layers. The inward roll end position D2 corresponds to the "end point on the inner periphery side of the inward roll portion" in this invention. The outward roll start position D3 is the insertion position of the sixth layer in the inner periphery layer connecting portion Ri of the outward roll portion 640d, where the segmented coil 80 is initially connected at the position of the sixth to fifth layers. The outward roll start position D3 corresponds to the "end point on the inner periphery side of the outward roll portion" in this invention. The outward roll end position D4 is the insertion position of the other side of the portion in the outer periphery layer connecting portion Ro of the outward roll portion 640d where the segmented coil 80 is finally connected from one side of the first and second layers to the other side.

[0177] The inner circumferential end connecting part Ji5 is the portion where a segmented coil 80 is disposed between the inward winding end position C2 and the outward winding start position C3. The inner circumferential end connecting part Ji6 is the portion where a segmented coil 80 is disposed between the inward winding end position D2 and the outward winding start position D3. The outer circumferential end connecting part Jo5 is the portion where a segmented coil 80 is disposed between the U-phase terminal 72 and the inward winding start position C1, and it is the portion that connects the first-layer segmented coils 80 inserted into each other. The outer circumferential end connecting part Jo6 is the portion where a segmented coil 80 is disposed between the outward winding end position C4 and the inward winding start position D1, and it is the portion that connects the first-layer segmented coils 80 inserted into each other.

[0178] The connection structure of the outer peripheral end connecting part Jo5, the inner rolled part 640a, the inner peripheral end connecting part Ji5, and the outer rolled part 640b is Figure 25 (b) The connection structure of the "insertion positions U1~U24" shown is the same as the connection structure of the outer peripheral end connecting part Jo1, the inner roll part 42a, the inner peripheral end connecting part Ji1, and the outer roll part 42b in Embodiment 1. The connection structure of the outer peripheral end connecting part Jo6, the inner roll part 640c, the inner peripheral end connecting part Ji6, and the outer roll part 640d is Figure 25 (b) The connection structure of “insertion position U25~U48” is the same as the connection structure of outer peripheral end connection part Jo2, inner roll part 44a, inner peripheral end connection part Ji2 and outer roll part 44b in embodiment 1.

[0179] The outer roll end position C4 of the outer roll portion 640b is connected to the inner roll portion 640c via the outer peripheral end connecting portion Jo6. Specifically, the second layer of slot number S7 is connected to the first layer of slot number S7 via the outer peripheral end connecting portion Jo6.

[0180] Similar to the inward-rolling portion 42a and outward-rolling portion 42b in Embodiment 1, the inward-rolling portion 640a and outward-rolling portion 640b respectively have an outer peripheral layer connecting portion Ro, an outer peripheral layer side transfer portion SWo, an intermediate layer connecting portion Rm, an inner peripheral layer side transfer portion SWi, and an inner peripheral layer connecting portion Ri. Similarly to the inward-rolling portion 44a and outward-rolling portion 44b in Embodiment 1, the inward-rolling portion 640c and outward-rolling portion 640d respectively have an outer peripheral layer connecting portion Ro, an outer peripheral layer side transfer portion SWo, an intermediate layer connecting portion Rm, an inner peripheral layer side transfer portion SWi, and an inner peripheral layer connecting portion Ri.

[0181] Regarding the connection sequence of the segmented coils 80 starting from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the third layer is later than the outer peripheral layer connecting portion Ro in the inner roll portion 640a. That is, when viewed from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the third layer is after the outer peripheral layer connecting portion Ro of the inner roll portion 640a has been circumferentially wrapped around, or after the outer peripheral layer connecting portion Ro of the inner roll portion 640a has been circumferentially wrapped around and further after the inner peripheral layer connecting portion Ri of the outer roll portion 640b has been circumferentially wrapped around. Regarding the connection sequence of the segmented coils 80 starting from the U-phase terminal 72 side, the connection of the segmented coil 80 inserted into the fourth layer is later than the outer peripheral layer connecting portion Ro in the inner roll portion 640a. That is, when viewed from the U-phase terminal 72 side, the connection to the segmented coil 80 inserted into the fourth layer is made after the outer peripheral layer connecting portion Ro of the inward-curled portion 640a is circumferentially wrapped around it, or after the outer peripheral layer connecting portion Ro of the inward-curled portion 640a is circumferentially wrapped around it and then the inner peripheral layer connecting portion Ri of the outward-curled portion 640b is circumferentially wrapped around it. Thus, when viewed from the U-phase terminal 72 side, both the connection to the segmented coil 80 inserted into the third layer and the connection to the segmented coil 80 inserted into the fourth layer are made after the outer peripheral layer connecting portion Ro of the inward-curled portion 640a is circumferentially wrapped around it.

[0182] like Figure 26 As shown in (c), the type of segmented coil 80 used in this embodiment to form the three-phase coil 624 is substantially the same as that in Embodiment 1.

[0183] Figure 27 This means that in Figure 26 The diagrams shown are of the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s in the three-phase coil 624. (a) is a diagram showing the relationship between the voltage difference between adjacent segmented coils 80 and the connection order of the segmented coils 80 from the input terminal 70 side. (b) is a diagram showing the voltage difference between adjacent segmented coils 80. (c) is a diagram showing the connection order of each phase of the segmented coils 80 from the input terminal 70 side and the voltage difference between adjacent segmented coils 80 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0184] like Figure 27 As shown in (a), adjacent segmented coils 80 within the same slot 22s are alternately arranged circumferentially in slots 22s where only six segmented coils 80 of the same phase are inserted and slots 22s where three segmented coils 80 of different phases are inserted. Figure 27 In (a), adjacent portions of segmented coils 80 of different phases within the same slot 22s are represented by black and white reverse characters.

[0185] Here, use Figure 24The voltage difference between adjacent segmented coils 80 within the same slot for 22 seconds will be explained. When the rotary motor 610 is driven to rotate, three-phase AC voltages are applied to the U-phase terminal 72, V-phase terminal 74, and W-phase terminal 76 respectively. Regarding the voltage difference between adjacent segmented coils 80 within the same slot for 22 seconds, there are cases between the segmented coils 80 of the U-phase coil 640, between the segmented coils 80 of the V-phase coil 650, between the segmented coils 80 of the W-phase coil 660, between the segmented coils 80 of the U-phase coil 640 and the V-phase coil 650, between the segmented coils 80 of the V-phase coil 650 and the W-phase coil 660, and between the segmented coils 80 of the W-phase coil 660 and the U-phase coil 640. Different calculation methods can be used for the cases of segmented coils 80 of the same phase and segmented coils 80 of different phases. Therefore, the situation between the segmented coils 80 of the U-phase coil 640 and between the segmented coils 80 of the U-phase coil 640 and the segmented coils 80 of the V-phase coil 650 will be described in a representative manner.

[0186] For ease of understanding, the segmented coil 80 wound on the stator core 22, which is made of electromagnetic steel sheet, will be explained in a simplified manner as an ideal inductive reactance. Here, the impedance that serves as the inductive reactance between the U-phase terminal 72 and the V-phase terminal 74 will be defined as impedance Z2 [Ω].

[0187] Between the U-phase terminal 72 and the neutral point N, a total of 47 locations are alternately provided on the connection portion 84 side of the segmented coil 80 and the welding portion 88 side where the front end portion 82t is welded to each other. There are 24 locations on the connection portion 84 side and 23 locations on the welding portion 88 side. The same applies between the V-phase terminal 74 and the neutral point N.

[0188] For example, when a voltage Vo [V] is applied to the U-phase terminal 72 relative to the V-phase terminal 74, a current Io (=Vo / Z2) [A] flows between the U-phase terminal 72 and the V-phase terminal 74. In this case, (1 / 94×Vo) [V] is applied to both the connection portion 84 side and the welding portion 88 side of the segmented coil 80 between the U-phase terminal 72 and the V-phase terminal 74. In the U-phase coil 640, the potential decreases by (1 / 94×Vo) [V] with each additional connection from the U-phase terminal 72 side toward the neutral point N. In the V-phase coil 650, the potential increases by (1 / 94×Vo) [V] with each additional connection from the V-phase terminal 74 side toward the neutral point N.

[0189] First, the case where adjacent segmented coils 80 within the same slot 22s are in phase, for example, one segmented coil 80 with insertion position of U-phase coil 640 in connection sequence Nu4 and another segmented coil 80 with insertion position of U-phase coil 640 in connection sequence Nu5, will be explained. Connection sequences Nu4 and Nu5 are synonymous with the numerical part at insertion positions (U1~U48). In this case, the voltage obtained by multiplying the difference in connection sequence from the common input terminal, i.e., U-phase terminal 72, of adjacent segmented coils 80 toward neutral point N (=|Nu4-Nu5|) by (1 / 94×Vo) [V] becomes the voltage difference between adjacent segmented coils 80. Furthermore, the maximum value of the difference in connection sequence from the common input terminal 70 to neutral point N of adjacent in-phase segmented coils 80 is the difference between the maximum value (=48) and the minimum value (=1) of the connection sequence, i.e., "47".

[0190] Next, the case where adjacent segmented coils 80 within the same slot 22s are of different phases will be explained. For example, the case where one segmented coil 80 with the insertion position of U-phase coil 640 and the insertion position of V-phase coil 650 with the insertion position of the connection sequence Nu6 is adjacent to another segmented coil 80 with the insertion position of the connection sequence Nv6 will be explained. The connection sequence Nu6 is synonymous with the numerical part at the insertion position (U1~U48), and the connection sequence Nv6 is synonymous with the numerical part at the insertion position (V1~V48). In this case, the total count on the connection portion 84 side and the solder portion 88 side of the segmented coil 80 located between the insertion positions of one segmented coil 80 and the insertion positions of the other segmented coil 80 is set as the total T. The total T is the difference between "96" and the sum of the connection sequence Nu6 and the connection sequence Nv6 {=96-(Nu6+Nv6)}. When one segmented coil 80 of the U-phase coil 640 is adjacent to another segmented coil 80 of the V-phase coil 650 within the same slot for 22 seconds, the voltage obtained by multiplying the total T by (1 / 94×Vo)[V] becomes the voltage difference between the adjacent segmented coils 80. The voltage difference can also be calculated in the same way when the segmented coil 80 of the V-phase coil 650 is adjacent to the segmented coil 80 of the W-phase coil 660, and when the segmented coil 80 of the W-phase coil 660 is adjacent to the segmented coil 80 of the U-phase coil 640 within the same slot for 22 seconds.

[0191] return Figure 27 .like Figure 27 As shown in (b), the voltage difference between the segmented coil 80 inserted into slot S12 (third layer) and the segmented coil 80 inserted into slot S16 (fourth layer) is at its maximum value (=59 / 94×Vo). Figure 27In (b), the part where the voltage difference between adjacent segmented coils 80 is the maximum value is displayed in black and white reverse characters. In addition, as mentioned above, when segmented coils 80 of the same phase are adjacent in the same slot 22s, the maximum value of the number obtained by dividing the voltage difference between adjacent segmented coils 80 by (1 / 94×Vo)[V] is "47".

[0192] Figure 27 (c) is a diagram showing the connection sequence of each phase of the segmented coil 80 from the input terminal 70 side and the voltage difference between adjacent segmented coils 80 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0193] Figure 28 This means that in Figure 26 The diagram shows the positional relationship of the adjacent segmented coils 80 within the three-phase coil 624 when the segmented coils 80 of different phases are adjacent in the same slot 22s.

[0194] like Figure 28 As shown, an outer peripheral end connection part Jo5, an inner roll part 640a, an inner peripheral end connection part Ji5, an outer roll part 640b, an outer peripheral end connection part Jo6, an inner roll part 640c, an inner peripheral end connection part Ji6, and an outer roll part 640d are connected in series between the U-phase terminal 72 and the neutral point N. If the inner roll parts 640a and 640c are set as the path from the outer peripheral side to the inner peripheral side, then the outer roll parts 640b and 640d become the loop from the inner peripheral side to the outer peripheral side. An outer peripheral end connection part Jo5, an inner roll part 650a, an inner peripheral end connection part Ji5, an outer roll part 650b, an outer peripheral end connection part Jo6, an inner roll part 650c, an inner peripheral end connection part Ji6, and an outer roll part 650d are connected in series between the V-phase terminal 74 and the neutral point N. The outer peripheral end connection part Jo5, the inner roll part 660a, the inner peripheral end connection part Ji5, the outer roll part 660b, the outer peripheral end connection part Jo6, the inner roll part 660c, the inner peripheral end connection part Ji6 and the outer roll part 660d are connected in series between the W phase terminal 76 and the neutral point N.

[0195] In the case where segmented coils 80 of different phases are adjacent within the same slot 22s, these adjacent segmented coils 80 are a combination of segmented coils 80 inserted into the third layer and segmented coils 80 inserted into the fourth layer. Regarding the connection sequence of the segmented coils 80 from the input terminal 70 side of each phase, the connection towards the segmented coils 80 inserted into the third layer is later than the outer peripheral layer connection portion Ro in the inward roll portion of each phase coil. Similarly, regarding the connection sequence of the segmented coils 80 from the input terminal 70 side of each phase, the connection towards the segmented coils 80 inserted into the fourth layer is later than the outer peripheral layer connection portion Ro in the inward roll portion of each phase coil. Figure 28In the diagram, dashed arrows indicate the positional relationship of adjacent segmented coils 80 when different phases of the same slot are adjacent within 22s.

[0196] Figure 29 These are diagrams illustrating the connection structure of the segmented coils 80 constituting the three-phase coil 924 of Comparative Example 2. (a) is a diagram showing the arrangement of the segmented coils 80, (b) is a schematic diagram illustrating the connection structure of the U-phase coil 940, and (c) is a diagram illustrating the types of segmented coils 80 used to constitute the three-phase coil 924. The three-phase coil 924 has a structure substantially the same as that of the three-phase coil 824 of Comparative Example 1, but differs in that it is replaced by the U-phase coil 840, V-phase coil 850, and W-phase coil 860, respectively becoming the U-phase coil 940, V-phase coil 950, and W-phase coil 960. In this comparative example, the description focuses on the parts that differ from Comparative Example 1, and the parts that are substantially common in function with Comparative Example 1 are labeled with the same reference numerals and their descriptions are omitted as appropriate.

[0197] exist Figure 29 In (a), the regions where the segmented coils 80 of the same phase are inserted are represented by thick solid lines.

[0198] like Figure 29 As shown in (a), in the attached drawing, the V-phase coil 950 has its connection structure of the segmented coils 80 constituting the U-phase coil 940 offset to the left by a spacing of 4, while the connection structure itself is the same. In the attached drawing, the W-phase coil 960 has its connection structure of the segmented coils 80 constituting the U-phase coil 940 offset to the left by a spacing of 8, while the connection structure itself is the same. Therefore, the following description will representatively focus on the connection structure of the segmented coils 80 constituting the U-phase coil 940, omitting descriptions of other connection structures as appropriate.

[0199] like Figure 29As shown in (b), the U-phase coil 940 has a serrated connection on the connecting portion 84 side of the segmented coil 80, which is formed by sequentially connecting the front ends 82t of a pair of segmented coils 80 with both arms 82 inserted into the first layer, a pair of segmented coils 80 with both arms 82 inserted into the second and third layers, and a pair of segmented coils 80 with both arms 82 inserted into the fourth and fifth layers. The U-phase coil 940 has a serrated connection on the connecting portion 84 side of the segmented coil 80, which is formed by sequentially connecting the front ends 82t of a pair of segmented coils 80 with both arms 82 inserted into the sixth layer, a pair of segmented coils 80 with both arms 822 inserted into the fifth and fourth layers, and a pair of segmented coils 80 with both arms 82 inserted into the third and second layers. Thus, the structure connecting the portion of the U-phase coil 940 that is serrated from the outer circumference to the inner circumference and the portion that is serrated from the inner circumference to the outer circumference is considered as a unit, and this structure is repeated in the circumferential direction.

[0200] like Figure 29 As shown in (c), on the welding part 88 side of the segmented coil 80 ( Figure 29 (b) As shown by the solid line side), the number of spacings of the segmented coils 80 inserted into each other on the sixth layer is 7. The remaining number of spacings of the segmented coils 80 on the welding part 88 side is ( Figure 29 (b) solid line side) and connecting part 84 side ( Figure 29 (b) The dashed side is 5. There are two types of segmented coils 80 used to construct the three-phase coil 924.

[0201] Figure 30 This means that in Figure 29 The graph shown in the diagram represents the maximum voltage difference between adjacent segmented coils 80 in the same slot 22s within the three-phase coil 924. Figure 30 The value shown is obtained by dividing the voltage difference between adjacent segmented coils 80 in the same slot 22s by (1 / 94×Vo)[V].

[0202] like Figure 30 As shown, the voltage difference between the segmented coil 80 inserted into slot S14 (second layer) and the segmented coil 80 inserted into the third layer is at its maximum value (=81 / 94×Vo). Figure 30 In the diagram, black and white reversed characters indicate the locations where the voltage difference between adjacent segmented coils 80 reaches its maximum value. In this embodiment, compared to Comparative Example 2, the maximum voltage difference between adjacent segmented coils 80 within the same slot 22s is reduced by approximately 27.2% {=1-(59 / 81)}.

[0203] According to this embodiment, by having the same structure as in Embodiment 1, the same effect is achieved based on this structure.

[0204] According to this embodiment, (a) the three-phase coil 624 is Y-connected, (b) a coil section is provided between the input terminal 70 of each phase of the U-phase coil 640, the V-phase coil 650, and the neutral point N, (c) for example, the U-phase coil 640 has two inward coil sections 640a and 640c, two outward coil sections 640b and 640d, and two inner peripheral end connection sections Ji5 and Ji6, and the V-phase coil 650 and the W-phase coil 660 also have the same structure as the U-phase coil 640, (d) the connection structure of the segmented coil 80 in the U-phase coil 640, the connection structure of the segmented coil 80 in the V-phase coil 650, and the connection structure of the segmented coil 80 in the W-phase coil 660 are the same as each other. According to the structure described in (c), when the three-phase coil 624 is Y-connected, it is easy to achieve commonality of the segmented coil 80 between the method of connecting one coil section in series between the input terminal 70 of each phase and the neutral point N and the method of connecting two coil sections in parallel.

[0205] According to this embodiment, regarding the U-phase coil 640, V-phase coil 650, and W-phase coil 660 in the three-phase coil 624, segmented coils 80 connected in the same order from the input terminal 70 side in each of the two inner coil portions 640a and 640c are inserted into adjacent slots 22s in the circumferential direction, and segmented coils 80 connected in the same order from the input terminal 70 side in each of the two outer coil portions 640b and 640d are inserted into adjacent slots 22s in the circumferential direction. Thus, in each of the two inner coil portions 640a and 640c, the segmented coils 80 connected in the same order from the input terminal 70 side for each phase are connected in the same order by being inserted into adjacent slots 22s in the circumferential direction, and the connection structure in the two inner coil portions 640a and 640c is identical to that in the two inner coil portions 640a and 640c. In each of the two outer winding sections 640b and 640d, the segmented coils 80, connected in the same order from the input terminal 70 side, are inserted into adjacent slots 22s in the circumferential direction, thus making the connection structures identical in the two outer winding sections 640b and 640d. In this way, with the connection structures of the two inner winding sections 640a and 640c and the two outer winding sections 640b and 640d being identical, a simpler structure is achieved by avoiding complex connection structures compared to situations where this is not the case. For example, the bending and welding processes of the segmented coils 80 become repetitive, and the workability of the winding process of the three-phase coil 624 is improved.

[0206] Furthermore, the above description represents various embodiments of the present invention, which can be implemented with various modifications and alterations based on the knowledge of those skilled in the art without departing from its spirit.

[0207] In the aforementioned embodiments 1 to 5, for example, the connection structures of the segmented coils 80 within the U-phase coil 40, the V-phase coil 50, and the W-phase coil 60 are identical, but the present invention is not limited to this method. For example, the present invention can also be applied to different connection structures of the segmented coils 80 within the U-phase coil 40, the V-phase coil 50, and the W-phase coil 60. For example, the present invention can also be a three-phase coil composed of any one of the U-phase coils 40, 140, 240, 340, 440, V-phase coils 50, 150, 250, 350, 450, and W-phase coils 60, 160, 260, 360, 460 from embodiments 1 to 5. Furthermore, when combining the phase coils of the connection structures of Embodiments 1 to 4 and the phase coils of the connection structure of Embodiment 5, it is preferable that the phase coils of the connection structure of Embodiment 5 and the phase coils of the connection structures of Embodiments 1 to 4 are oriented in opposite directions, so that the connecting portions 84 and welding portions 88 of the segmented coils 80 of these phase coils do not intersect each other in three dimensions.

[0208] In the aforementioned embodiments 1 to 5, for example, in each of the first coil section 42 and second coil section 44 of the U-phase coil 40, the first coil section 52 and second coil section 54 of the V-phase coil 50, and the first coil section 62 and second coil section 64 of the W-phase coil 60, segmented coils 80 with the same connection sequence from the input terminal 70 side of each phase are inserted into adjacent slots 22s in the circumferential direction. However, the present invention is not limited to this method. For example, the present invention may also be in the following manner: in the first coil section 42 and second coil section 44 of the U-phase coil 40, the first coil section 52 and second coil section 54 of the V-phase coil 50, and the first coil section 62 and second coil section 64 of the W-phase coil 60, segmented coils 80 with the same connection sequence from the input terminal 70 side are inserted into slots 22s that are not adjacent in the circumferential direction.

[0209] In Embodiment 7, the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri in the inward roll portions 640a and 640c are oriented in the same direction along the circumferential direction. However, for example, it is also possible that one of the directions of the outer peripheral layer connecting portion Ro, the middle layer connecting portion Rm, and the inner peripheral layer connecting portion Ri in the inward roll portions 640a and 640c is different from the other directions, as in Embodiments 2 and 3.

[0210] In the aforementioned embodiment 7, the U-phase coil 640, V-phase coil 650, and W-phase coil 660 are respectively provided with outer peripheral end connection portions Jo5 and Jo6, but they can also be provided without outer peripheral end connection portions Jo5 and Jo6, as in the aforementioned embodiment 4.

[0211] In Embodiment 7, the inward roll start positions C1 and D1 of the inward roll portions 650a and 650c of the V-phase coil 650 are staggered by a distance of 4 relative to the inward roll start positions C1 and D1 of the inward roll portions 640a and 640c of the U-phase coil 640, and the inward roll start positions C1 and D1 of the inward roll portions 660a and 660c of the W-phase coil 660 are staggered by a distance of 8. However, the present invention is not limited to this method. For example, similar to Embodiment 5 described above, the positions can be predetermined such that the maximum value of the voltage difference between the segmented coils 80 inserted in the third layer and the segmented coils 80 inserted in the fourth layer of different phases within the same slot 22s at the respective inward roll start positions C1 and D1 of the U-phase coil 640, V-phase coil 650, and W-phase coil 660 decreases.

[0212] In the aforementioned embodiment 7, for example, the connection structures of the segmented coils 80 in the U-phase coil 640, the V-phase coil 650, and the W-phase coil 660 are identical, but the present invention is not limited to this method. For example, the present invention can also be applied to different connection structures of the segmented coils 80 in the U-phase coil 640, the V-phase coil 650, and the W-phase coil 660.

[0213] In the aforementioned embodiment 7, for example, in each of the two inward-curved portions 640a and 640c of the U-phase coil 640, the two inward-curved portions 650a and 650c of the V-phase coil 650, and the two inward-curved portions 660a and 660c of the W-phase coil 660, segmented coils 80 with the same connection sequence starting from the input terminal 70 side of each phase are inserted into adjacent slots 22s in the circumferential direction. However, the present invention is not limited to this method. For example, the present invention may also be in the following manner: in the two inward-curved portions 640a and 640c of the U-phase coil 640, segmented coils 80 with the same connection sequence starting from the U-phase terminal 72 side are inserted into slots 22s that are not adjacent in the circumferential direction.

[0214] In embodiments 1 to 6, the inward roll start positions A1, B1, C1, and D1 of the outer peripheral layer connecting portion Ro are the insertion positions of the first layer, but the present invention is not limited to this method. For example, the present invention can also be applied to a method where the inward roll start positions A1, B1, C1, and D1 of the outer peripheral layer connecting portion Ro are the insertion positions of the second layer.

[0215] In the aforementioned embodiments 1, 2, 3, and 5, the pair of arms 82 are inserted into the connecting portion 84 of the segmented coil 80 in the sixth layer, and the spacing between the inner peripheral end connecting portions Ji1 and Ji2 is 5 and 7 respectively. In the aforementioned embodiment 4, there is no pair of arms 82 inserted into the segmented coil 80 in the sixth layer, and the spacing between the inner peripheral end connecting portions Ji1 and Ji2 is 5 and 7 on the welding portion 88 side of the segmented coil 80. In the aforementioned embodiment 6, the pair of arms 82 are inserted into the connecting portion 84 of the segmented coil 80 in the sixth layer, and the spacing between the inner peripheral end connecting portions Ji3 and Ji4 is 6. In the aforementioned embodiment 7, the pair of arms 82 are inserted into the connecting portion 84 of the segmented coil 80 in the sixth layer, and the spacing between the inner peripheral end connecting portions Ji5 and Ji6 is 5 and 7 respectively. The present invention is not limited to these embodiments. For example, when there are 48 or more slots 22s, the number of spacings of the inner peripheral end connecting portions Ji1, Ji2, Ji3, Ji4, Ji5, and Ji6 on the side of the connecting portion 84 of the segmented coil 80 in the sixth layer can be set to 17 or 19, or 18, when the pair of arms 82 are inserted into the segmented coil 80 in the sixth layer. Alternatively, it can be set such that, when there is no pair of arms 82 inserted into the segmented coil 80 in the sixth layer, the number of spacings of the inner peripheral end connecting portions Ji1 and Ji2 on the side of the solder portion 88 of the segmented coil 80 is 17 or 19.

Claims

1. A rotary electric motor, said rotary electric motor (10; 110; 210; 310; 410; 510; 610) comprising: The stator core (22) is a cylindrical shape extending along the axis (CL) and has multiple slots (22s); A distributed three-phase coil (24; 124; 224; 324; 424; 524; 624) is formed by inserting six segmented coils (80) into each of the plurality of slots (22s) and welding one end (82t) of a pair of arms (82) of each segmented coil (80) inserted into different slots (22s) to each other. Each segmented coil (80) has the pair of arms (82) and a connecting portion (84) that connects the roots of the pair of arms (82) to each other. The rotor (30) is disposed on the inner circumferential side of the stator core (22). Its features are, The number of slots (22s) is six times the number of poles of the rotor (30). When the insertion positions of the segmented coils (80), each containing six of the six segments, are designated as layers 1, 2, 3, 4, 5, and 6 from the outer periphery to the inner periphery of the plurality of slots (22s), three of the segmented coils (80) of the same phase in the three-phase coils (24; 124; 224; 324; 424; 524; 624) are inserted from the first layer to the third layer on the outer periphery of a group of slots (22s) that are circumferentially adjacent in the plurality of slots (22s), and three are inserted from the fourth layer to the sixth layer on the inner periphery of another group of slots (22s) that are circumferentially offset by one slot (22s) relative to the first group of slots (22s). The phase coils (40, 50, 60; 140, 150, 160; 240, 250, 260; 340, 350, 360; 440, 450, 460; 540, 550, 560; 640, 650, 660) of each phase in the three-phase coils (24; 124; 224; 324; 424; 524; 624; 64a; 142a, 144a, 15) respectively have: inwardly rolled portions (42a, 44a, 52a, 54a, 62a, 64a; 142a, 144a, 15) 2a, 154a, 162a, 164a; 242a, 244a, 252a, 254a, 262a, 264a; 342a, 344a, 352a, 354a, 362a, 364a; 442a, 44 4a, 452a, 454a, 462a, 464a; 542a, 544a, 552a, 554a, 562a, 564a; 640a, 640c, 650a, 650c, 660a, 660c), from The segmented coil (80) is connected from the outer periphery to the inner periphery; the outer coil portions (42b, 44b, 52b, 54b, 62b, 64b; 142b, 144b, 152b, 154b, 162b, 164b; 242b, 244b, 252b, 254b, 262b, 264b; 342b, 344b, 352b, 354b, 362b, 364b; 442b, 444b, 452b, 454b, 462b, 464b) ;542b, 544b, 552b, 554b, 562b, 564b; 640b, 640d, 650b, 650d, 660b, 660d), the segmented coils (80) are connected from the inner circumference side to the outer circumference side; and connecting parts (Ji1, Ji2, Ji3, Ji4, Ji5, Ji6), connecting the inner circumference side ends (A2, B2, C2, D2) of the inner roll part to the inner circumference side ends (A3, B3, C3, D3) of the outer roll part. The inner roll portion and the outer roll portion each have an outer peripheral layer connecting portion (Ro), which are connected in the first layer and the second layer in a manner in which the segmented coil (80) wraps around the periphery. Regarding the connection sequence of the segmented coils (80) starting from the input terminals (72, 74, 76) of the phase coil, the connection to the segmented coils (80) inserted into the third layer and the connection to the segmented coils (80) inserted into the fourth layer are after the outer peripheral layer connection portion (Ro) in the inner roll portion.

2. The rotary motor according to claim 1, characterized in that, In the rotary motors (10; 110; 210; 310; 410; 510; 610), the inwardly rolled portions (42a, 44a, 52a, 54a, 62a, 64a; 142a, 144a, 152a, 154a, 162a, 164a; 242a, 244a, 252a, 254a, 262a, 264a; 342a, 344a, 352a, 354a, 362a, 364a; 442a, 44a) 4a, 452a, 454a, 462a, 464a; 542a, 544a, 552a, 554a, 562a, 564a; 640a, 640c, 650a, 650c, 660a, 660c) and the outer roll portions (42b, 44b, 52b, 54b, 62b, 64b; 142b, 144b, 152b, 154b, 162b, 164b; 242b, 244b, 252b, 254b) The following are examples of materials: 262b, 264b; 342b, 344b, 352b, 354b, 362b, 364b; 442b, 444b, 452b, 454b, 462b, 464b; 542b, 544b, 552b, 554b, 562b, 564b; 640b, 640d, 650b, 650d, 660b, 660d) each having an inner peripheral layer connecting portion (Ri), which, in the fifth and sixth layers, enables the... The segmented coils (80) are connected in a circumferential manner; the intermediate layer connecting part (Rm) is connected in the third and fourth layers in a circumferential manner to make the segmented coils (80) circumferentially connected; the outer peripheral layer side transfer part (SWo) connects the end of the outer peripheral layer connecting part (Ro) to the end of the intermediate layer connecting part (Rm); and the inner peripheral layer side transfer part (SWi) connects the end of the inner peripheral layer connecting part (Ri) to the end of the intermediate layer connecting part (Rm).

3. The rotary motor according to claim 2, characterized in that, In the rotary motors (10; 110; 210; 310; 410; 510; 610), the outer peripheral layer connecting portion (Ro), the middle layer connecting portion (Rm), and the inner peripheral layer connecting portion (Ri) of the inwardly rolled portions (42a, 44a, 52a, 54a, 62a, 64a; 342a, 344a, 352a, 354a, 362a, 364a; 442a, 444a, 452a, 454a, 462a, 464a; 542a, 544a, 552a, 554a, 562a, 564a; 640a, 640c, 650a, 650c, 660a, 660c) each have the same orientation along the circumferential direction.

4. The rotary motor according to claim 2, characterized in that, In the rotary motor (10; 110; 210; 310; 410; 510; 610), in each of the outer peripheral layer connecting portion (Ro), the intermediate layer connecting portion (Rm), and the inner peripheral layer connecting portion (Ri), the inwardly rolled portions (42a, 44a, 52a, 54a, 62a, 64a; 142a, 144a, 152a, 154a, 162a, 16...) 4a; 242a, 244a, 252a, 254a, 262a, 264a; 342a, 344a, 352a, 354a, 362a, 364a; 442a, 4 44a, 452a, 454a, 462a, 464a; 542a, 544a, 552a, 554a, 562a, 564a; 640a, 640c, 650a, The segmented coils (80) in 650c, 660a, 660c) are circumferentially encircled by the outer coils (42b, 44b, 52b, 54b, 62b, 64b; 142b, 144b, 152b, 154b, 162b, 164b; 242b, 244b, 252b, 254b, 262b, 264b; 342b, 344b, 3 The segmented coils (80) in 52b, 354b, 362b, 364b; 442b, 444b, 452b, 454b, 462b, 464b; 542b, 544b, 552b, 554b, 562b, 564b; 640b, 640d, 650b, 650d, 660b, 660d) are oriented in opposite directions along the circumferential direction.

5. The rotary electric motor according to any one of claims 2 to 4, characterized in that, In the rotary motors (10; 110; 210; 310; 410; 510; 610), in both the outer peripheral layer connecting portion (Ro) and the inner peripheral layer connecting portion (Ri), the number of slots (22s) in the circumferential direction on the connecting portion (84) side and the front end portion (82t) side of the segmented coil (80) is 6. In the intermediate layer connecting portion (Rm), the number of slots (22s) in the circumferential direction on the connecting portion (84) side and the front end portion (82t) side of the segmented coil (80) is 5 and 7 respectively. In the outer peripheral layer-side transfer section (SWo) and the inner peripheral layer-side transfer section (SWi), the number of slots (22s) in the circumferential direction on either the connecting portion (84) side or the front end portion (82t) side of the segmented coil (80) is 6.

6. The rotary electric motor according to any one of claims 1 to 4, characterized in that, The rotary motor (410) has, in a plurality of slots (22s), the winding start positions (A1, B1, C1, D1) of the outer peripheral layer connecting portion (Ro) of the inner winding portion (442a, 444a, 452a, 454a, 462a, 464a) of the phase coils (440, 450, 460) respectively set at predetermined positions. The predetermined positions are predetermined in such a way that the maximum value of the voltage difference between the segmented coils (80) of different phases inserted into the third layer and the segmented coils (80) inserted into the fourth layer in the same slot (22s) becomes lower.

7. The rotary electric motor according to any one of claims 1 to 4, characterized in that, In the rotary electric motor (10; 110; 210; 310; 410; 510), the three-phase coils (24; 124; 224; 324; 424; 524) are Y-connected. Two parallel-connected first coil sections (42, 52, 62; 142, 152, 162; 240, 250, 260; 340, 350, 360; 440, 450, 460; 540, 550, 560) and second coil sections (44, 54, 64; 144, 154, 164; 242, 252, 262; 342, 352, 362; 442, 452, 462) and second coil sections (44, 54, 64; 144, 154, 164; 244, 254, 264; 344, 354, 364; 444, 454, 464) are respectively provided between the input terminals (72, 74, 76) of the phase coils (40, 50, 60; 140, 150, 160; 240, 250, 260; 344, 354, 364; 444, 454, 464) and the neutral point (N). The connection structure of the segmented coils (80) within the phase coils is the same for each phase.

8. The rotary electric motor according to claim 7, characterized in that, In the rotary electric motor (10; 110; 210; 310; 410), the phase coils (40, 50, 60; 140, 150, 160; 240, 250, 260; 340, 350, 360; 440, 450, 460) of the three-phase coils (24, 124, 224, 324, 424) are located in the first coil section (42, 52, 62; 142, 152, 162; 242, 252, 2...). In the second coil section (62; 342, 352, 362; 442, 452, 462) and the second coil section (44, 54, 64; 144, 154, 164; 244, 254, 264; 344, 354, 364; 444, 454, 464), the segmented coils (80) with the same connection sequence starting from the input terminals (72, 74, 76) of the phase coil are inserted into the slots (22s) adjacent in the circumferential direction.

9. The rotary electric motor according to any one of claims 1 to 4, characterized in that, In the rotary motor (610), the three-phase coil (624) is Y-connected. A coil section (640, 650, 660) is provided between the input terminals (72, 74, 76) of the phase coils (640, 650, 660) and the neutral point (N). The phase coils (640, 650, 660) each have two inner winding portions (640a, 640c, 650a, 650c, 660a, 660c), two outer winding portions (640b, 640d, 650b, 650d, 660b, 660d), and two connecting portions (Ji1, Ji2, Ji3, Ji4, Ji5, Ji6). The connection structure of the segmented coils (80) within the phase coils (640, 650, 660) is the same for each phase.

10. The rotary electric motor according to claim 9, characterized in that, In the rotary motor (610), regarding the phase coils (640, 650, 660) of the three-phase coils (624), in each of the two inner coil portions (640a, 640c, 650a, 650c, 660a, 660c), the segmented coils (80) connected in the same order from the input terminals (72, 74, 76) are inserted into the adjacent slots (22s) in the circumferential direction, and in each of the two outer coil portions (640b, 640d, 650b, 650d, 660b, 660d), the segmented coils (80) connected in the same order from the input terminals (72, 74, 76) are inserted into the adjacent slots (22s) in the circumferential direction.

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