armature

Abstract

The present invention relates to an armature (100) in which a first transition portion (72) and a second transition portion (82) arranged with transition portions of different phases adjacent to each other have an insulated voltage value higher than a first leg (71) and a second leg (81) arranged with legs of the same phase adjacent to each other.

Description

Technical Field

[0001] This invention relates to armatures. Background Technology

[0002] Previously, armatures with segmented conductors having transition sections were known. Such armatures are disclosed, for example, in Japanese Patent Application Publication No. 2004-64989.

[0003] Japanese Patent Application Publication No. 2004-64989 discloses a stator having a stator core with multiple slots. U-shaped segmented conductors are inserted into the slots of the stator core. Specifically, the segmented conductor includes a pair of slot insertion portions extending in a straight line, and an insertion-side end portion connecting one end of the pair of slot insertion portions to each other. The pair of slot insertion portions are inserted into different slots. Furthermore, the insertion-side end portion is provided to protrude from one axial side of the slot. Additionally, the segmented conductor has a pair of engagement-side ends integrally formed with the slot insertion portions at the other end. Each pair of engagement-side ends is provided to protrude from the other axial side of the slot. After the pair of engagement-side ends, while protruding from the other axial side of the slot, are bent close together, their ends engage with each other.

[0004] Here, there are cases where multiple mating ends (insertion ends) are arranged adjacent to each other in a manner that corresponds to mating ends (insertion ends) of different phases, and multiple slot insertion portions are arranged adjacent to slot insertion portions of the same phase within the slot. In this case, the mating ends (insertion ends) arranged adjacent to each other in a manner that corresponds to the slot insertion portions require higher insulation performance than the mating ends (insertion ends) arranged in a manner that corresponds to the slot insertion portions. Therefore, as described in Japanese Patent Application Publication No. 2004-64989, it is considered to perform insulation treatment, such as forming a powder coating film, on both the insertion ends and the mating ends to make the insulation performance of the insertion ends (matting ends) higher than that of the slot insertion portions.

[0005] Patent Document 1: Japanese Patent Application Publication No. 2004-64989

[0006] However, in the existing armature described in Japanese Patent Application Publication No. 2004-64989, at least one of the insulating transition portions passes through the slot, thus causing damage to the transition portion (such as the insulation layer formed therein). Furthermore, when the transition portions are joined together by welding or other joining processes after the segmented conductors are inserted into the slot, damage to the transition portion (such as the insulation layer formed therein) can occur due to the joining process. In other words, in the existing armature described in Japanese Patent Application Publication No. 2004-64989, when the segmented conductors are axially arranged in the stator core, there is a problem of damage to the insulating transition portion (such as the insulation layer formed therein). Moreover, the segmented conductors can be radially inserted into the stator core by dividing the core (a stator core divided circumferentially), but the division of the stator core can worsen losses (such as iron losses due to increased magnetic reluctance). Summary of the Invention

[0007] This invention was developed to address the aforementioned problems. One objective of this invention is to provide an armature in which, when segmented conductors are arranged axially in the armature core, the transition portions are more reliably insulated from each other, and damage to the insulated transition portions is prevented.

[0008] To achieve the above objectives, the armature of the first embodiment of the invention comprises: an armature core having a plurality of slots extending axially; and a coil portion including a multi-phase first segmented conductor, a multi-phase second segmented conductor, and a connecting portion. The first segmented conductor includes a pair of first legs extending axially to one side and a first transition portion connecting the ends of the pair of first legs on the other side of the axial direction. The second segmented conductor includes a pair of second legs extending axially to the other side of the axial direction and a second transition portion connecting the ends of the pair of second legs on one side of the axial direction. The connecting portion connects the ends of the first legs on the other side of the axial direction. The axial end of the second leg is engaged in a slot or on the axial outside of a slot. The first legs of each of the plurality of first segment conductors are configured adjacent to each other as first legs of the same phase. The second legs of each of the plurality of second segment conductors are configured adjacent to each other as second legs of the same phase. The first transition portions of each of the plurality of first segment conductors are configured adjacent to each other as first transition portions of different phases. The second transition portions of each of the plurality of second segment conductors are configured adjacent to each other as second transition portions of different phases. The insulated voltage values ​​of the first and second transition portions are higher than those of the first and second legs. Furthermore, the term "joint" refers not only to portions joined by an adhesive but also broadly to portions that only contact each other without an adhesive.

[0009] Here, compared to legs configured to be adjacent to each other in the same phase, transition sections configured to be adjacent to each other in different phases require higher insulation performance. Therefore, in the armature of the first embodiment of the invention, as described above, the insulated voltage values ​​of the first and second transition sections are higher than those of the first and second legs, enabling more reliable insulation of the first and second transition sections respectively.

[0010] Furthermore, as described above, the armature includes a first segment conductor and a second segment conductor. Moreover, the first leg of the first segment conductor engages with the second leg of the second segment conductor. That is, before the first leg engages with the second leg, the first segment conductor and the second segment conductor are independently (separately) arranged. In this case, the first segment conductor is moved axially to one side (the side opposite to where the first leg is located in the first transition section), and the second segment conductor is moved axially to the other side (the side opposite to where the second leg is located in the second transition section), thereby arranging the first leg and the second leg in a close proximity and engaging with each other. Thus, without inserting the first transition section and the second transition section separately into the slot along the axial direction, it is possible to bring the first leg and the second leg close together and engage with each other. As a result, the transition section does not pass through the slot, thus preventing damage to the transition section (damage to the insulating film and insulating components) that has undergone insulation treatment (formation of the insulating film and arrangement of insulating components, etc.) to improve insulation performance (insulating voltage value).

[0011] Furthermore, in the aforementioned armature, unlike the case where at least one of the first transition portion and the second transition portion is inserted axially into the slot, the segmented conductors can be positioned in the slot with the first transition portions (and the second transition portions) pre-joined together. That is, it is not necessary to join the first transition portions (and the second transition portions) together by welding or other joining processes after the segmented conductors are positioned in the slot. This prevents damage to the transition portions (damage to the insulating film and insulating components) caused by joining processes.

[0012] As a result, when segmented conductors are arranged axially in the armature core, the transition sections can be more reliably insulated from each other, and damage to the insulated transition sections can be prevented.

[0013] The armature of the second aspect of the invention comprises: an armature core having a plurality of slots extending axially; and a coil portion including a multi-phase first segmented conductor, a multi-phase second segmented conductor, and a connecting portion. The first segmented conductor includes a pair of first legs extending axially to one side and a first transition portion connecting the ends of the pair of first legs on the other side of the axial direction. The second segmented conductor includes a pair of second legs extending axially to the other side of the axial direction and a second transition portion connecting the ends of the pair of second legs on one side of the axial direction. The connecting portion connects the ends of the first legs on the other side of the axial direction. The ends of the first leg and the other axial end of the second leg are joined in a slot or on the outer side of a slot. A first leg-side insulating layer is provided on each pair of first legs, and a second leg-side insulating layer is provided on each pair of second legs. In the first transition portion, the portions of the first transition portions that are at least configured with different phases and are adjacent to each other are provided with a first transition portion-side insulating layer that is thicker than the first leg-side insulating layer. Similarly, in the second transition portion, the portions of the second transition portions that are at least configured with different phases and are adjacent to each other are provided with a second transition portion-side insulating layer that is thicker than the second leg-side insulating layer. Furthermore, the term "joint portion" refers not only to portions joined by an adhesive but also broadly to portions that only contact each other without an adhesive.

[0014] As described above, in the second embodiment of the invention, the portion of the armature in the first transition section where at least the first transition sections of different phases are adjacent to each other is provided with a first transition section side insulation layer that is thicker than the first leg side insulation layer. Similarly, in the second transition section, the portion of the second transition section where at least the second transition sections of different phases are adjacent to each other is provided with a second transition section side insulation layer that is thicker than the second leg side insulation layer. This allows for more reliable insulation of both the first and second transition sections.

[0015] Furthermore, as described above, the armature includes a first segment conductor and a second segment conductor. Moreover, the first leg of the first segment conductor engages with the second leg of the second segment conductor. Here, before the first leg engages with the second leg, the first segment conductor and the second segment conductor are arranged independently (separately). In this case, the first segment conductor is moved axially to one side (the side opposite to where the first leg is located in the first transition section), and the second segment conductor is moved axially to the other side (the side opposite to where the second leg is located in the second transition section), thereby arranging the first leg and the second leg in a close proximity and engaging with each other. Thus, without inserting the first transition section and the second transition section separately into the slot along the axial direction, it is possible to bring the first leg and the second leg close together and engage with each other. As a result, the transition section does not pass through the slot, thus preventing damage to the transition section (damage to the insulation layer on the first transition section side and the insulation layer on the second transition section side).

[0016] Furthermore, in the aforementioned armature, unlike the case where at least one of the first transition portion and the second transition portion is inserted axially into the slot, the segmented conductors can be positioned in the slot with the first transition portions (and the second transition portions) pre-joined together. That is, it is not necessary to join the first transition portions (and the second transition portions) together by welding or other joining processes after the segmented conductors are positioned in the slot. This prevents damage to the transition portions (damage to the insulation layers on the first and second transition portions) caused by joining processes.

[0017] As a result, when the segmented conductors are arranged axially in the armature core, the transition sections can be more reliably insulated from each other, and damage to the transition sections (damage to the insulation layer on the first transition section side and the insulation layer on the second transition section side) can be prevented.

[0018] Furthermore, compared to the case where at least one of the first transition portion and the second transition portion is inserted axially into the slot, it is possible to prevent an increase in the axial opening area of ​​the slot and to prevent the armature core from becoming too large. Therefore, even when the first segment conductor and the second segment conductor are arranged axially in the armature core, even if the thickness of the insulation layer on the first transition portion side is greater than the thickness of the insulation layer on the first leg side, and the thickness of the insulation layer on the second transition portion side is greater than the thickness of the insulation layer on the second leg side, it is possible to prevent the armature core from becoming too large compared to the case where at least one of the first transition portion and the second transition portion is inserted axially into the slot.

[0019] Furthermore, by not inserting the first and second transition portions separately into the slots, the first leg can be brought close to the second leg, thus eliminating the need to insert the coil portion radially inward. As a result, damage to the insulation layer of the transition portion due to radial inward pressure during insertion is prevented. Additionally, by moving the first and second segmented conductors axially, the legs can be positioned in the slots without using multiple circumferentially segmented armature cores and moving the segmented armature cores radially. As a result, compared to the case where the armature core is segmented, the deterioration of armature core losses (such as iron losses due to increased magnetic reluctance) can be prevented.

[0020] Furthermore, by not inserting the first and second transition portions separately into the slot, the first leg and the second leg can be brought close together, thus eliminating the need to increase the top-view area of ​​the slot. As a result, it is possible to prevent the armature core from becoming too large and to prevent the armature from experiencing further losses.

[0021] According to the present invention, as described above, when segmented conductors are arranged axially in the armature core, the transition portions can be more reliably insulated from each other, and damage to the insulated transition portions can be prevented. Attached Figure Description

[0022] Figure 1 This is a top view showing the structure of the stator (rotary motor) in the first and second embodiments.

[0023] Figure 2 This is a perspective view showing the structure of the stator in the first embodiment.

[0024] Figure 3 This is a partially enlarged top view showing the structure of the stator core in the first and second embodiments.

[0025] Figure 4 This is a partially enlarged cross-sectional view showing the structure of the core leg insulation component and the joint insulation component of the first embodiment.

[0026] Figure 5 This is a circuit diagram showing the wiring structure of the coil section in the first embodiment.

[0027] Figure 6 This is a front view showing the structure of the first conductor in the first embodiment.

[0028] Figure 7 This is a front view showing the structure of the second conductor in the first embodiment.

[0029] Figure 8 is a cross-sectional view showing the structure of the leg in the first embodiment. Figure 8A This is a cross-sectional view of the first leg. Figure 8B (This is a cross-sectional view of the second leg.)

[0030] Figure 9 is a cross-sectional view showing the structure of the transition section in the first embodiment. Figure 9A This is a cross-sectional view of the first transition section. Figure 9B This is a cross-sectional view of the second transition section.

[0031] Figure 10 It is along Figure 1 A sectional view of the 1000-1000 line.

[0032] Figure 11 yes Figure 10 A magnified view of the area near the first transition section.

[0033] Figure 12 yes Figure 10 A magnified view of the area near the second transition section.

[0034] Figure 13 yes Figure 10 A magnified view of the area near the joint.

[0035] Figure 14 This is a cross-sectional view showing the structure of the joint insulation component of the first embodiment.

[0036] Figure 15 This is a perspective view showing the structure of the joint insulation component according to the first embodiment.

[0037] Figure 16 This is an exploded perspective view showing the stator core, core leg insulation components, and joint insulation components of the first embodiment.

[0038] Figure 17 This is a flowchart used to explain the manufacturing method of the stator according to the first embodiment.

[0039] Figure 18 is a diagram illustrating the structure of the transition section in the first embodiment. Figure 18A This is a diagram showing the first segment conductor positioned in the slot, viewed from the radial inside. Figure 18B This is a diagram showing the second segment conductor positioned in the slot, viewed from the radial inside. Figure 18C (This is a magnified top view of the area near the transition section.)

[0040] Figure 19 This is an exploded perspective view of the stator in the second embodiment.

[0041] Figure 20 This is a cross-sectional view of the segmented conductor in the second embodiment.

[0042] Figure 21 This is a radial cross-sectional view of the slot in the second embodiment.

[0043] Figure 22 yes Figure 21 A magnified view of the area near the contact point.

[0044] Figure 23 This is a cross-sectional view showing the structure of the insulating component in the second embodiment.

[0045] Figure 24 This is a cross-sectional view showing the structure of the insulating layer and the fixing layer of the insulating component in the second embodiment.

[0046] Figure 25 This is a flowchart illustrating the manufacturing method of the stator according to the second embodiment.

[0047] Figure 26 This is a partial enlarged view of the vicinity of the joint of the stator in the first modified example of the first embodiment.

[0048] Figure 27 This is a partial enlarged view of the vicinity of the joint of the stator in the second variation of the first embodiment.

[0049] Figure 28 is a perspective view of the first conductor and the second conductor in a third variation of the first embodiment. Figure 28AThis is a three-dimensional view of the first conductor viewed from the radial outer side. Figure 28B This is a three-dimensional view of the second conductor viewed from the radially outer side.

[0050] Figure 29 This is a cross-sectional view showing the structure of the insulating component in the fourth variation of the second embodiment. Detailed Implementation

[0051] Hereinafter, this embodiment of the present invention will be described with reference to the accompanying drawings.

[0052] [First Implementation Method]

[0053] [Stabilizer Structure]

[0054] Reference Figures 1 to 17 The structure of the stator 100 in this embodiment will be described. The stator 100 has an annular shape with the central axis C as the center. Furthermore, the stator 100 is an example of the "armature" in the claims.

[0055] In this application specification, such as Figure 1 As shown, "axial (axial direction)" refers to the direction (Z direction) along the central axis C of the stator 100 (the rotation axis of the rotor 101). One side of the axial direction refers to the Z1 direction side, and the other side refers to the Z2 direction side. "Circumferential" refers to the circumferential direction of the stator 100 (A1 direction, A2 direction). "Radial" refers to the radial direction of the stator 100 (R direction). "Radially inward" refers to the direction radially toward the central axis C of the stator 100 (R1 direction). "Radially outward" refers to the direction radially toward the outside of the stator 100 (R2 direction).

[0056] The stator 100 and rotor 101 together form part of the rotary electric machine 102. The rotary electric machine 102 may be configured as, for example, a motor, a generator, or a combination of both. Figure 1 As shown, the stator 100 is disposed radially outside the rotor 101, which is provided with permanent magnets (not shown). That is, in this embodiment, the stator 100 constitutes part of the inner rotor type rotary motor 102.

[0057] like Figure 2 As shown, the stator 100 includes a stator core 10, sheet-shaped core leg insulating members 20, and a coil portion 30. The core leg insulating members 20 are for housing the slot 12 (see reference 10). Figure 3 The core leg insulating member 20 is disposed between the slot 12 and the coil portion 30, insulated from the coil portion 30 (the first leg 71 and the second leg 81 described later). That is, the core leg insulating member 20 is inserted into the slot 12. The core leg insulating member 20 is insulated from the insulating layer 73 described later (see reference 73). Figure 8A ) and the insulating layer 83 described later (see reference) Figure 8B The stator core 10 is set independently of the armature core as claimed. Furthermore, the stator core 10 is an example of the "armature core" of the claims.

[0058] Additionally, the coil section 30 includes a first coil assembly 30a (reverse lead-side coil) and a second coil assembly 30b (lead-side coil). Furthermore, the coil section 30 comprises a plurality of segmented conductors 40 (see reference). Figure 4 The stator 100 is configured as follows. Additionally, the stator 100 includes a sheet-like joint insulation member 21 (see reference 20) disposed independently of the core leg insulation member 20. Figure 4 ).

[0059] (Structure of the stator core)

[0060] The stator core 10 has a central axis C (refer to...) Figure 1 The stator core 10 is a cylindrical shape with a central axis. Additionally, the stator core 10 is formed, for example, by stacking multiple electromagnetic steel plates (e.g., silicon steel plates) axially. Figure 3 As shown, the stator core 10 is provided with: a back yoke 11, which has an annular shape when viewed along the axial direction; and multiple slots 12, which are provided on the radially inner side of the back yoke 11 and extend along the axial direction. Moreover, in the stator core 10, multiple teeth 13 are provided on both sides of the slots 12 in the circumferential direction.

[0061] The slot 12 is enclosed by the wall portion 11a of the back yoke 11 located radially outward and the circumferential side surfaces 13a of the two teeth 13. Furthermore, the slot 12 has an opening 12a that opens radially inward. Additionally, the slot 12 opens to both axial directions. The teeth 13 are formed to protrude radially inward from the back yoke 11, and a protrusion 13b constituting the opening 12a of the slot 12 is formed at the front end of the tooth 13 on the radially inward side.

[0062] The opening 12a has a circumferential width W1. Here, the opening width W1 corresponds to the distance between the front ends of the protrusions 13b of the teeth 13. Furthermore, the width W2 of the portion of the slot 12 where the coil portion 30 is disposed is greater than the opening width W1. That is, the slot 12 is configured as a semi-open type slot. Here, the width W2 corresponds to the distance between the circumferential side surfaces 13a of the teeth 13 disposed on both circumferential sides of the slot 12. Additionally, the width W2 of the slot 12 is approximately constant radially.

[0063] (Structure of the coil section)

[0064] like Figure 4 As shown, the coil section 30 is made of a flat-angle wire. For example, the coil section 30 is made of copper or aluminum.

[0065] In addition, such as Figure 2As shown, the coil section 30 is formed by axially combining and joining a first coil assembly 30a disposed on the other axial side (Z2 direction side) and a second coil assembly 30b disposed on one axial side (Z1 direction side). The first coil assembly 30a and the second coil assembly 30b are respectively formed with the same central axis C as the stator core 10 (see reference). Figure 1 A ring centered on ). Additionally, as... Figure 4 As shown, in this embodiment, the coil portion 30 is formed by joining the first leg 71 and the second leg 81 of a plurality of segmented conductors 40 at the joint portion 90.

[0066] The coil section 30 is configured as a wound coil, for example. Alternatively, the coil section 30 is configured as an 8-turn coil. That is, the coil section 30 is configured by arranging 8 segmented conductors 40 radially side by side within the slot 12.

[0067] <Wire connection structure of the coil section>

[0068] like Figure 5 As shown, the coil section 30 is configured to receive three-phase alternating current from a power supply unit (not shown), thereby generating magnetic flux. Specifically, the coil section 30 is connected (wiring) via a three-phase Y-connection. That is, the coil section 30 includes a U-phase coil section 30U, a V-phase coil section 30V, and a W-phase coil section 30W. Furthermore, multiple (e.g., two) neutral points N are provided in the coil section 30. In detail, the coil section 30 is connected in a four-parallel connection (star connection). That is, the U-phase coil section 30U has four neutral point connection terminals NtU and four power line connection terminals PtU. The V-phase coil section 30V has four neutral point connection terminals NtV and four power line connection terminals PtV. The W-phase coil section 30W has four neutral point connection terminals NtW and four power line connection terminals PtW. Furthermore, in the following description, without specifically distinguishing between the U phase, V phase, and W phase, the neutral point connection end and the power line connection end are simply referred to as "neutral point connection end Nt" and "power line connection end Pt".

[0069] Construction of the coil assembly

[0070] like Figure 2 As shown, the first coil assembly 30a is composed of a plurality of first segmented conductors 70 (hereinafter referred to as "first conductors 70") that serve as segmented conductors 40. Preferably, the first coil assembly 30a is composed of only a plurality of first conductors 70.

[0071] Furthermore, the second coil assembly 30b includes: a plurality (e.g., three) of power segment conductors 50 (hereinafter referred to as "power conductors 50") serving as segment conductors 40; a plurality (e.g., two) of neutral point segment conductors 60 (hereinafter referred to as "neutral point conductors 60") serving as segment conductors 40; and a second segment conductor 80 (hereinafter referred to as "second conductor 80") that is different from the power conductors 50 and the neutral point conductors 60 among the plurality of segment conductors 40 (a general segment conductor 40) and constitutes the coil section 30. That is, all the power conductors 50 and neutral point conductors 60 provided on the stator 100 are provided in the second coil assembly 30b.

[0072] Construction of the first and second conductors

[0073] like Figure 6 As shown, the coil section 30 includes a plurality of first conductors 70, each of which includes a pair of first legs 71 extending toward one side (Z1 direction side) of the stator core 10 in the axial direction. The plurality of first conductors 70 includes multi-phase first conductors 70. Specifically, the plurality of first conductors 70 includes a first conductor 70 for the U phase, a first conductor 70 for the V phase, and a first conductor 70 for the W phase. Furthermore, the plurality of first conductors 70 are respectively disposed on the other side (Z2 direction side) of the stator core 10 in the axial direction. Additionally, the first legs 71 of each of the plurality of first conductors 70 have an axial length L1.

[0074] In addition, such as Figure 7 As shown, the coil section 30 includes a plurality of second conductors 80, each of which includes a pair of second legs 81 extending toward the other side (Z2 direction side) of the stator core 10 along its axial direction. The plurality of second conductors 80 includes multi-phase second conductors 80. Specifically, the plurality of second conductors 80 includes a second conductor 80 for the U phase, a second conductor 80 for the V phase, and a second conductor 80 for the W phase. Furthermore, the plurality of second conductors 80 are respectively disposed on one side (Z1 direction side) of the stator core 10 along its axial direction. Additionally, the plurality of second conductors 80 are respectively configured to be axially opposed to the plurality of first conductors 70. Furthermore, each second leg 81 of the plurality of second conductors 80 has a length L2 in the axial direction. Moreover, the length L2 of the second leg 81 is greater than the length L1 of the first leg 71.

[0075] Furthermore, the coil portion 30 is formed by joining a first conductor 70 and a second conductor 80, which are divided into two parts in the axial direction. Specifically, the coil portion 30 includes a joining portion 90 (see reference) that joins the end 71a of the first leg 71 on one side of the axial direction with the end 81a of the second leg 81 on the other side of the axial direction in a slot 12. Figure 10Here, the second conductor 80 is the segmented conductor 40 constituting the second coil assembly 30b, excluding the power conductor 50 and the neutral point conductor 60. Furthermore, end 71a is the portion including the first surface arrangement portion 71d, which will be described later. Additionally, end 81a is the portion including the second surface arrangement portion 81d, which will be described later.

[0076] like Figure 6 As shown, each of the multiphase first conductors 70 includes a first transition portion 72 connecting the ends 71b of a pair of first legs 71 on the opposite side (Z2 direction side) of their axial direction. The multiphase first conductors 70 are each formed such that a pair of first legs 71 disposed in different slots 12 are connected by the first transition portion 72, thereby having a U-shape (approximately U-shape) when viewed radially. The coil pitch of the first conductor 70 is 6. That is, the pair of first legs 71 are disposed at different circumferential positions of the size of 6 slots 12. Specifically, there are 5 slots 12 between the slot 12 for one of the first legs 71 and the slot 12 for the other first leg 71. Furthermore, a first leg 71 refers to the portion of the first conductor 70 that extends linearly along its axial direction. Specifically, a first leg 71 refers to the portion from the end 71b to the front end 71e of the first leg 71, described later. Additionally, the first transition portion 72 refers to the portion of the first conductor 70 other than the first legs 71.

[0077] Furthermore, the first transition portion 72 has a curved shape that bends axially. Specifically, the first transition portion 72 has a first curved portion 72a that bends at the center of the first transition portion 72. Additionally, the first transition portion 72 has a pair of first oblique portions 72b extending in a straight line from the first curved portion 72a on the sides of a pair of first legs 71 in a mutually intersecting manner. Furthermore, when viewed axially, the first curved portion 72a is formed as a crank-shaped portion that bends radially in a stepped manner, approximately the width of one segmented conductor 40. That is, the radial width of the first curved portion 72a is twice the width of one segmented conductor 40. Moreover, "mutually intersecting" means that when viewed radially, the extension lines of the first oblique portions 72b intersect each other axially outside the stator core 10.

[0078] Furthermore, the axial lengths L1 of the pair of first legs 71 are approximately equal. Additionally, the axial length L1 is less than the axial length L3 of the stator core 10 (see reference). Figure 2 Furthermore, the axial length L3 of the stator core 10 refers to the axial distance (gap) between end face 10a and end face 10b in the axial direction.

[0079] Similarly, as Figure 7As shown, each of the multiphase second conductors 80 includes a second transition portion 82 that connects the ends 81b of a pair of second legs 81 on one side (Z1 direction side) of their axial direction to each other. The multiphase second conductors 80 are each formed in a U-shape, with a pair of second legs 81 disposed in different slots 12 connected by the second transition portion 82. The coil pitch of the second conductor 80 is 6. That is, the pair of second legs 81 are disposed at different circumferential positions of the size of six slots 12. Specifically, five slots 12 are provided between the slot 12 for one of the second legs 81 and the slot 12 for the other second leg 81. Furthermore, a second leg 81 refers to the portion of the second conductor 80 that extends linearly along its axial direction. Specifically, a second leg 81 refers to the portion from the end 81b to the front end 81e of the second leg 81, described later. Additionally, the second transition portion 82 refers to the portion of the second conductor 80 other than the second legs 81.

[0080] Furthermore, the second transition portion 82 has a curved shape that bends along the axial direction. Specifically, the second transition portion 82 has a second curved portion 82a that bends at the center of the second transition portion 82. Additionally, the second transition portion 82 has a pair of second oblique portions 82b that extend in a straight line from the second curved portion 82a on the sides of a pair of second legs 81 in a mutually intersecting manner. Furthermore, when viewed along the axial direction, the second curved portion 82a is formed as a crank-shaped portion that bends in a stepped manner in the radial direction with a width equal to that of one segmented conductor 40. That is, the radial width of the second curved portion 82a is twice the width of one segmented conductor 40.

[0081] Furthermore, the axial lengths L2 of the pair of second legs 81 of the second conductor 80 are approximately equal. Additionally, the axial length L2 of the pair of second legs 81 of the second conductor 80 is greater than the axial length L1 of the pair of first legs 71 of the first conductor 70 (L2 > L1).

[0082] In addition, such as Figure 8A As shown, an insulating layer 73 is provided on each of the pair of first legs 71. Specifically, the segmented conductors 40 (first conductor 70 and second conductor 80) are configured as flat-angled wires with a generally rectangular cross-section. Furthermore, an insulating layer 73 of thickness t1 is provided on the conductor surface 70a of the first conductor 70. The thickness t1 of the insulating layer 73 is, for example, set to a degree sufficient to ensure phase-to-phase insulation performance (insulation between the first legs 71). In addition, in Figure 8A The diagram illustrates the relationship between thicknesses, etc., for illustrative purposes, but is not limited to the example shown. Furthermore, insulating layer 73 is an example of the "first leg-side insulating layer" in the claims.

[0083] In addition, such as Figure 8BAs shown, an insulating layer 83 is provided on each of the pair of second legs 81. Specifically, the insulating layer 83 of the second conductor 80 is provided with an insulating layer 83 having a thickness t2. The thickness t2 of the insulating layer 83 is, for example, set to a degree that ensures the intra-phase insulation performance (insulation between the second legs 81). Furthermore, in Figure 8B The diagram emphasizes the relationship between thicknesses, etc., for illustrative purposes, but is not limited to the example shown. Furthermore, the thickness t2 of insulating layer 83 is approximately equal to the thickness t1 of insulating layer 73. Additionally, insulating layer 83 is an example of the "second leg-side insulating layer" as described in the claims.

[0084] Additionally, multiple first legs 71 are arranged radially along the stator core 10 within a slot 12 (see reference). Figure 10 Additionally, multiple second legs 81 are arranged radially along the stator core 10 within a slot 12 (see reference). Figure 10 ).

[0085] Specifically, on the other side of the axial direction (Z2 direction side) within the slot 12, a plurality of first transition portions 72 are arranged radially (see reference). Figure 10 Additionally, a plurality of second transition portions 82 are arranged radially on one side (Z1 direction side) within the slot 12 (see reference). Figure 10 ).

[0086] Here, as shown in Figure 18, the first transition portions 72 of each of the plurality of first conductors 70 are arranged adjacent to each other in a manner that corresponds to first transition portions 72 of different phases. In Figure 18, the segmented conductors of phases U, V, and W are shown respectively. Specifically, a pair of first oblique portions 72b in the first transition portions 72 are adjacent to the first oblique portions 72b of the first transition portions 72 of different phases (in both radial and axial directions) (see reference). Figure 11 The configuration is as follows: Furthermore, in Figure 18, only the first transition section 72 is shown, but the structure of the second transition section 82 is the same, so it is omitted from the figure.

[0087] In addition, such as Figure 7 As shown, the second transition portions 82 of each of the plurality of second conductors 80 are arranged adjacent to each other in a manner that is different from the second transition portions 82 of each other. Specifically, a pair of second oblique portions 82b in the second transition portions 82 are generally adjacent to the second oblique portions 82b of the second transition portions 82 of different phases (in both the radial and axial directions) (see reference). Figure 12 Set it in the way of ).

[0088] like Figure 18A As shown, at least one of the pair of first oblique portions 72b has a portion 72e partially disposed on a radially oriented surface 72d and adjacent to a first transition portion 72 of a different phase. Figure 18A(The diagonal part). In Figure 18A The diagram illustrates a state where four parts 72e are provided in each of a pair of straight sections 72b. Additionally, as shown... Figure 18B As shown, similar to the first transition portion 72, each of the pair of second oblique portions 82b has a portion 82e that is partially disposed on the radially oriented surface 82d and adjacent to the second transition portions 82 which are of different phases.

[0089] like Figure 18C As shown, this is caused by the second oblique portion 82b (first oblique portion 72b) being arranged to be radially offset from each other (shifted by one column) with the second curved portion 82a (first curved portion 72a) as the boundary. As a result, the second oblique portions 82b (first oblique portions 72b) that are not in the same phase are arranged to be locally adjacent in the radial direction.

[0090] Specifically, a pair of first legs 71 are configured to be radially offset from each other by a radial width W11 (see reference). Figure 11 The size of the second legs 81. Additionally, the pair of second legs 81 are configured to be radially offset from each other. The radial width W12 of the second legs 81 (refer to...) Figure 12 The size of the first oblique portion 72b is specified. Additionally, the pair of first oblique portions 72b are configured to be radially offset from each other, with a radial width W11. The pair of second oblique portions 82b are configured to be radially offset from each other, with a radial width W12.

[0091] Furthermore, among the plurality of radially arranged first oblique portions 72b, excluding the innermost and outermost first oblique portions 72b, each first oblique portion 72b other than the innermost and outermost first oblique portions 72b is adjacent to a first transition portion 72 of a different phase at the radially facing surfaces 72d on both sides. Similarly, among the plurality of radially arranged second oblique portions 82b, excluding the innermost and outermost second oblique portions 82b, each second oblique portion 82b is adjacent to a second transition portion 82 of a different phase at the radially facing surfaces 82d on both sides.

[0092] Furthermore, the first oblique portion 72b also has a portion in the circumferential (axial) direction adjacent to the first oblique portion 72b of a different phase on the surface 72f facing the circumferential (axial) direction. Specifically, as Figure 18A As shown, U1, U2, V1, V2... are arranged from left to right. Therefore, U2 is adjacent to the first oblique portion 72b of V1 in the circumferential (axial) direction. Additionally, as... Figure 18B As shown, the second oblique section 82b is also provided with a surface 82f having a portion that is adjacent to the second oblique section 82b of a different phase in the circumferential (axial) direction.

[0093] Here, in this embodiment, as Figure 6As shown, the insulation performance of the first transition portion 72 and the second transition portion 82 is higher than that of the first leg portion 71 and the second leg portion 81. Specifically, in the portion of the first transition portion 72 where at least the first transition portions 72 of different phases are arranged adjacent to each other (i.e., the first oblique portion 72b), a layer 73 (see reference 73) is provided that is more insulating than the first transition portion 72. Figure 8A The insulating layer 74 is thick. Furthermore, the insulating layer 74 is an example of the "first transition side insulating layer" in the claims. Additionally, "high insulation performance" refers to a high voltage value that can be insulated.

[0094] In detail, such as Figure 9A As shown, insulating layer 74 includes a first base insulating layer 74a and a first additional insulating layer 74c. The first base insulating layer 74a and insulating layer 73 (see reference) Figure 8A The first additional insulating layer 74a is formed integrally and has a thickness t3 equal to the thickness t1 of the insulating layer 73. A first additional insulating layer 74c is disposed on the surface 74b of the first base insulating layer 74a. The thickness t4 of the first additional insulating layer 74c is greater than the thickness t1 of the insulating layer 73 (the thickness t3 of the first base insulating layer 74a). For example, the thickness t4 of the first additional insulating layer 74c is approximately 1.5 times the thickness t1 of the insulating layer 73 (the thickness t3 of the first base insulating layer 74a). In this case, the thickness (t3+t4) of the insulating layer 74 is approximately 2.5 times the thickness t1 of the insulating layer 73. Furthermore, the first additional insulating layer 74c and the first base insulating layer 74a are each formed of the same material as the insulating layer 73 (e.g., an insulating material such as polyimide).

[0095] In addition, such as Figure 7 As shown, in the portion of the second transition portion 82 where at least the second transition portions 82 of different phases are arranged adjacent to each other (i.e., the second oblique portion 82b), a layer 83 (see reference) is provided that is more insulating than the insulating layer 83. Figure 8B The insulating layer 84 is thick. Furthermore, the insulating layer 84 is an example of the "second transition side insulating layer" in the claims.

[0096] Specifically, such as Figure 9B As shown, insulating layer 84 includes a second basic insulating layer 84a and a second additional insulating layer 84c. The second basic insulating layer 84a and insulating layer 83 (see reference) Figure 8BThe second additional insulating layer 84a is formed integrally and has a thickness t5 equal to the thickness t2 of the insulating layer 83. A second additional insulating layer 84c is disposed on the surface 84b of the second base insulating layer 84a. The thickness t6 of the second additional insulating layer 84c is greater than the thickness t2 of the insulating layer 83 (the thickness t5 of the second base insulating layer 84a). For example, the thickness t6 of the second additional insulating layer 84c is approximately 1.5 times the thickness t2 of the insulating layer 83 (the thickness t5 of the second base insulating layer 84a). In this case, the thickness (t5+t6) of the insulating layer 84 is approximately 2.5 times the thickness t2 of the insulating layer 83. Furthermore, the second additional insulating layer 84c and the second base insulating layer 84a are each formed of the same material as the insulating layer 83 (e.g., an insulating material such as polyimide).

[0097] As described above, a first additional insulating layer 74c (second additional insulating layer 84c) is provided in the first transition section 72 (second transition section 82) where the voltage difference between different phases becomes relatively large, thereby enabling the stator 100 to cope with high voltage.

[0098] In addition, in this embodiment, such as Figure 6 As shown, insulating layers 74 (first additional insulating layers 74c) are respectively disposed on the first curved portion 72a and a pair of first inclined portions 72b. Specifically, insulating layers 74 (first additional insulating layers 74c) are disposed on the portion of the first transition portion 72 other than the first inclined portion 72c described later.

[0099] Furthermore, the first additional insulating layer 74c provided on the insulating layer 74 in the first curved portion 72a is integrally provided with the first additional insulating layer 74c provided on the insulating layer 74 in the pair of first inclined portions 72b. Specifically, the first additional insulating layer 74c is a single insulating layer. In other words, the insulating layer 74 is not divided into multiple layers, but is an insulating layer continuously formed at the first transition portion 72.

[0100] In addition, such as Figure 9A As shown, the insulating layer 74 is configured to circumferentially surround the first transition portion 72 in a cross-section orthogonal to the direction in which the first transition portion 72 extends. That is, when the cross-section is viewed, the insulating layer 74 has an annular shape that covers the first transition portion 72 from the radially outward.

[0101] In addition, in this embodiment, such as Figure 7 As shown, insulating layer 84 (second additional insulating layer 84c) is respectively provided on the second curved portion 82a and a pair of second inclined portions 82b. Specifically, insulating layer 84 (second additional insulating layer 84c) is provided on the portion of the second transition portion 82 other than the second inclined portion 82c described later.

[0102] Furthermore, the second additional insulating layer 84c provided on the insulating layer 84 in the second curved portion 82a is integrally provided with the second additional insulating layer 84c provided on the insulating layer 84 in the pair of second oblique portions 82b. Specifically, the second additional insulating layer 84c is a single insulating layer. In other words, the insulating layer 84 is not divided into multiple layers, but is an insulating layer continuously formed at the second transition portion 82.

[0103] In addition, such as Figure 9B As shown, the insulating layer 84 is configured to surround the second transition portion 82 in a circumferential shape on a cross section orthogonal to the second transition portion 82. That is, when the cross section is viewed, the insulating layer 84 has an annular shape that covers the second transition portion 82 from the radially outward.

[0104] (Structure of the inclined section)

[0105] like Figure 11 As shown, at least a portion of a plurality of radially arranged first transition portions 72 are provided with a first inclined portion 72c. The first inclined portion 72c is provided on the end 71b side of the first leg 71. Furthermore, the first inclined portion 72c is inclined radially outward. The first inclined portion 72c is provided between the portion of the first transition portion 72 where the insulating layer 74 is provided and the first leg 71 (end 71b). Although not shown in the figure, only the first basic insulating layer 74a is provided in the first inclined portion 72c (see reference). Figure 9A Furthermore, the first inclined portion 72c is provided in one of the plurality of (eight in this embodiment) radially arranged first transition portions 72, excluding the radially innermost first transition portion 72. That is, when observing a cross-section along the radial direction of the slot 12, the plurality of first transition portions 72, excluding the radially innermost first transition portion 72, are respectively offset radially outward compared to the first leg portion 71. Furthermore, in Figure 11 For simplicity, the insulating layer 73 in the diagram is omitted.

[0106] As described above, a plurality of (seven in this embodiment) first inclined portions 72c are arranged radially. Here, in this embodiment, the tilt angle θ1 of the radially outer first inclined portion 72c relative to the axial direction is greater than that of the radially inner first inclined portion 72c. In other words, the tilt angle θ1 of each of the plurality of radially arranged first inclined portions 72c gradually increases sequentially starting from the radially innermost first inclined portion 72c.

[0107] In addition, such as Figure 12As shown, at least a portion of a plurality of radially arranged second transition portions 82 are provided with a second inclined portion 82c. The second inclined portion 82c is provided on the end 81b side of the second leg 81. Furthermore, the second inclined portion 82c is inclined radially outward. The second inclined portion 82c is provided between the portion of the second transition portion 82 where the insulating layer 84 is provided and the second leg 81 (end 81b). Although not shown in the figure, only the second basic insulating layer 84a is provided in the second inclined portion 82c (see reference). Figure 9B Furthermore, the second inclined portion 82c is provided in one of the plurality of radially arranged second transition portions 82 (eight in this embodiment), excluding the radially innermost second transition portion 82. That is, when observing a cross-section along the radial direction of the slot 12, the plurality of second transition portions 82, excluding the radially innermost second transition portion 82, are respectively offset radially outward compared to the second leg portion 81. Furthermore, in Figure 12 For simplicity, the insulating layer 83 in the diagram is omitted.

[0108] As described above, a plurality of (seven in this embodiment) second inclined portions 82c are arranged radially. Here, in this embodiment, the inclination angle θ2 of the radially outer second inclined portions 82c relative to the axial direction is greater than that of the radially inner second inclined portions 82c. In other words, the inclination angle θ2 of each of the radially arranged second inclined portions 82c gradually increases sequentially, starting from the radially innermost second inclined portion 82c. Furthermore, in Figure 11 as well as Figure 12 For simplicity, the illustration of the joint insulation component 21 is omitted.

[0109] (Structure of the joint)

[0110] like Figure 13 As shown, within a slot 12, the ends 71a of a plurality of first conductors 70 (first legs 71) engage with the ends 81a of a plurality of second conductors 80 (second legs 81). Specifically, the end 71a includes a first surface configuration portion 71d provided with a first surface 71c extending axially. Additionally, the end 81a includes a second surface configuration portion 81d provided with a second surface 81c extending axially. A plurality of first surface configuration portions 71d and second surface configuration portions 81d are arranged alternately in the radial direction. That is, the engagement portions 90 of the plurality of first legs 71 and the plurality of second legs 81 are arranged radially adjacent to each other within a slot 12. Furthermore, in Figure 13 For simplicity, the illustration of the joint insulation component 21 is omitted.

[0111] Specifically, when viewed radially, multiple joints 90 are arranged in an overlapping manner within a slot 12. That is, all joints 90 disposed within a slot 12 are arranged in a horizontal direction. In other words, within a slot 12, the positions of the multiple joints 90 in the axial direction are approximately equal to each other. Furthermore, as will be described later, when viewed radially, the joint 90 is the portion where the first surface 71c of the first leg 71 (end 71a) and the second surface 81c of the second leg 81 (end 81a) engage (overlap).

[0112] Furthermore, the front end portion 71e of the first leg 71 and the front end portion 81e of the second leg 81 each have a tapering shape. Specifically, when viewed from the circumferential direction (direction A), the front end portion 71e of the first leg 71 and the front end portion 81e of the second leg 81 each have a tapering shape.

[0113] Furthermore, the first leg portion 71 has a first leg main body portion 71f that is continuously disposed on the first surface configuration portion 71d on which the first surface 71c is provided. The first leg main body portion 71f is disposed on the side opposite to the front end portion 71e (Z2 direction side) relative to the first surface configuration portion 71d. Additionally, the second leg portion 81 has a second leg main body portion 81f that is continuously disposed on the second surface configuration portion 81d on which the second surface 81c is provided. The second leg main body portion 81f is disposed on the side opposite to the front end portion 81e (Z1 direction side) relative to the second surface configuration portion 81d.

[0114] Furthermore, a first gap 75 is provided between the first conductor 70 and the second conductor 80, which are axially opposed to each other, and between the front end 71e of the first leg 71 and the second leg 81 (the main body of the second leg 81f). Additionally, a second gap 85 is provided between the first conductor 70 and the second conductor 80, which are axially opposed to each other, and between the front end 81e of the second leg 81 and the first leg 71 (the main body of the first leg 71f).

[0115] Here, in this embodiment, as shown in FIG18, the first legs 71 of each of the plurality of first conductors 70 are arranged radially adjacent to each other in phase with each other. Additionally, the second legs 81 of each of the plurality of second conductors 80 are arranged adjacent to each other in phase with each other. Specifically, as... Figure 13As shown, within a slot 12, a plurality of first legs 71 of the same phase are arranged radially, and a plurality of second legs 81 of the same phase are arranged radially. Specifically, the eight first legs 71 disposed within a slot 12 are of the same phase. Similarly, the eight second legs 81 disposed within a slot 12 are of the same phase. Furthermore, the first legs 71 and second legs 81 disposed within a slot 12 are of the same phase. That is, all the plurality of first legs 72 and the plurality of second legs 82 disposed in multiple slots 12 are of the same phase. In other words, within a slot 12, legs (71, 81) of different phases are not arranged adjacent to each other. Moreover, in the plurality of circumferentially arranged slots 12, legs (71, 81) of different phases are arranged every two. That is, legs (71, 81) are arranged in the multiple slots 12 in the order of U phase, U phase, V phase, V phase, W phase, W phase... (the cycle is repeated below). However, the arrangement (phase arrangement) of the legs (71, 81) in the multiple slots 12 is not limited to this.

[0116] (Construction of the insulating components of the iron core legs)

[0117] like Figure 4 As shown, the core leg insulation component 20 is disposed between the wall portion 11a and the tooth 13, and between the first leg portion 71 and the second leg portion 81 (segmented conductor 40).

[0118] Furthermore, when viewed along the Z2 direction, the core leg insulation member 20 is configured to integrally cover the periphery of the plurality of second legs 81 arranged in parallel in the radial direction. In other words, the circumferential and radial sides of the plurality of second legs 81 arranged in parallel in the radial direction are covered by the core leg insulation member 20. As a result, insulation between the joint 90 and the stator core 10 can be ensured by the core leg insulation member 20.

[0119] (Construction of the insulating component at the joint)

[0120] In addition, such as Figure 14 As shown, in a slot 12, the radially adjacent joint portions 90 formed by joining the end 71a (first surface 71c) of the first leg 71 and the end 81a (second surface 81c) of the second leg 81 are insulated from each other by a sheet-like joint insulating member 21. The joint insulating member 21 is provided independently of the core leg insulating member 20. Furthermore, "coil" refers to the straight portion of the coil portion 30 disposed within the slot 12 after the first conductor 70 and the second conductor 80 are joined. Therefore, multiple coils are disposed in one slot 12.

[0121] Here, as Figure 14As shown, the joint insulation member 21 is formed, for example, by folding a sheet-like insulation member such as NOMEX. Furthermore, the joint insulation member 21 includes opposing surface insulation portions 21a disposed between radially adjacent joints 90. Additionally, the joint insulation member 21 includes a circumferential surface insulation portion 21b, which is continuous from both circumferential ends of the opposing surface insulation portion 21a and covers at least one of the circumferential surfaces 90a of the radially adjacent joints 90 by at least an insulation distance. Furthermore, the insulation distance refers to the radial length of the circumferential surface insulation portion 21b and is a distance sufficient to insulate the radially adjacent joints 90 from each other (surface distance).

[0122] In addition, such as Figure 15 As shown, the joint insulation member 21 includes a portion 21c that covers the radially outer side of the joint 90 disposed on the radially outermost side. Additionally, the joint insulation member 21 includes a portion 21d that covers the radially inner side of the joint 90 disposed on the radially innermost side.

[0123] Furthermore, in the joint insulation member 21, radially adjacent opposing surface insulation portions 21a are connected by circumferential surface insulation portions 21b on one or the other side in the circumferential direction. Specifically, the radially outer opposing surface insulation portion 21a, the circumferential surface insulation portion 21b on one side in the circumferential direction, the radially inner opposing surface insulation portion 21a, and the circumferential surface insulation portion 21b on the other side in the circumferential direction of a pair of opposing surface insulation portions 21a arranged in a radially adjacent manner are formed continuously. That is, the circumferential surface 90a on the A1 direction side of the joint 90 and the circumferential surface 90a on the A2 direction side of the joint 90 are alternately covered by the circumferential surface insulation portions 21b. In other words, the joint insulation member 21 is configured to discontinuously cover the circumferential surfaces 90a of a plurality of joints 90 arranged in a radially adjacent manner.

[0124] Thus, when viewed axially, the joint insulating member 21 has a serpentine shape (belly-like shape). Furthermore, by using a single joint insulating member 21 to insulate radially adjacent joints 90 disposed within a slot 12 from each other, all joints 90 within the slot 12 are insulated from each other. Therefore, compared to the case where multiple joints 90 disposed within a slot 12 are individually covered by insulating members, the number of steps required for configuring the joint insulating member 21 can be reduced.

[0125] Furthermore, the joint insulation member 21 is configured to be radially expandable and contractible. Because the joint insulation member 21 is composed of a flexible, sheet-like insulation member, and is configured to discontinuously cover the circumferential surfaces 90a of a plurality of joints 90 arranged radially adjacent to each other, when the first leg 71 and the second leg 81 are joined, even if the first leg 71 and the second leg 81 are pressed radially or axially, the joint insulation member 21 can deform along with the movement of the first leg 71 and the second leg 81.

[0126] In this embodiment, the core leg insulation component 20 and the joint insulation component 21 are provided independently of the insulation layer 74 and the insulation layer 84, respectively. Furthermore, the core leg insulation component 20 and the joint insulation component 21 are axially separated from the insulation layer 74 and the insulation layer 84, respectively.

[0127] In addition, such as Figure 16 As shown, in the axial direction, the length L12 of the joint insulation member 21 is less than the length L11 of the core leg insulation member 20. Specifically, the length L11 of the core leg insulation member 20 is greater than the axial length L3 of the stator core 10. Furthermore, the length L12 of the joint insulation member 21 is less than the length L3 of the stator core 10. Additionally, the joint insulation member 21 covers the joint 90 and is arranged to extend from the joint 90 towards the Z1 and Z2 directions. The length L12 of the joint insulation member 21 is adjusted based on the magnitude of the voltage applied to the coil portion 30 (based on the necessary surface distance). Furthermore, in... Figure 16 For simplicity, the illustrations of the first conductor 70 and the second conductor 80 have been omitted.

[0128] (Stator manufacturing method)

[0129] Next, refer to Figure 17 The manufacturing method of stator 100 is described.

[0130] (The process of preparing segmented conductors and forming additional insulating layers)

[0131] First, such as Figure 17 As shown, in step S1, a plurality of segmented conductors 40 are prepared. Specifically, power conductors 50 constituting the power line connection ends Pt of each phase of the coil section 30 with Y-connection, neutral point conductors 60 constituting the neutral point connection ends Nt of each phase of the coil section 30, and first conductors 70 and second conductors 80 constituting other parts of the coil section 30 are prepared.

[0132] For example Figure 8A as well as Figure 9AAs shown, an insulating layer 73 and a first base insulating layer 74a are formed (coated) on the conductor surface 70a of the first conductor 70, which is made of a conductive material such as copper. Furthermore, the insulating layer 73 and the first base insulating layer 74a are integrally formed. That is, the insulating layer 73 and the first base insulating layer 74a are formed in the same process.

[0133] In addition, such as Figure 8B as well as Figure 9B As shown, an insulating layer 83 and a second base insulating layer 84a are formed (coated) on the conductor surface 80a of the second conductor 80, which is made of a conductive material such as copper. Furthermore, the insulating layer 83 and the second base insulating layer 84a are integrally formed, thus the insulating layer 83 and the second base insulating layer 84a are formed in the same process.

[0134] Next, the first conductor 70 and the second conductor 80 are formed by a forming jig (not shown), thereby forming the first conductor 70. Figure 6 ), second conductor 80 ( Figure 7 ), and the second leg 81, which constitutes part of the power conductor 50 or part of the neutral point conductor 60.

[0135] At this time, a first inclined portion 72c is formed on the first conductor 70 and a second inclined portion 82c is formed on the second conductor 80 using a forming jig (not shown). Specifically, the first conductor 70 and the second conductor 80 are formed such that the inclination angle θ1 (θ2) of the first inclined portion 72c (second inclined portion 82c) located on the radially outer side is greater than the inclination angle θ1 (θ2) of the first inclined portion 72c (second inclined portion 82c) located on the radially inner side.

[0136] Next, as Figure 9A as well as Figure 9B As shown, a first additional insulating layer 74c is formed (coated) on the surface 74b of the first base insulating layer 74a, and a second additional insulating layer 84c is formed (coated) on the surface 84b of the second base insulating layer 84a. Specifically, methods for forming the first additional insulating layer 74c and the second additional insulating layer 84c include immersing the first transition portion 72 (second transition portion 82) in a fluid insulating material, coating the first transition portion 72 (second transition portion 82) with insulating material by spraying or the like, attaching heat shrink tubing to the first transition portion 72 (second transition portion 82), and winding insulating tape around the first transition portion 72 (second transition portion 82), etc.

[0137] (Formation of the first coil assembly and the second coil assembly)

[0138] Next, in step S2, a first coil assembly 30a in the shape of a ring, consisting of a plurality of segmented conductors 40, is formed (see reference). Figure 2 ) and the second coil assembly 30b (refer to Figure 2 The first coil assembly 30a and the second coil assembly 30b are configured such that a plurality of (e.g., eight) segmented conductors 40 are arranged radially side by side and a number of slots 12 are arranged circumferentially side by side. A power conductor 50 and a neutral point conductor 60 are configured in the second coil assembly 30b.

[0139] (The process of placing the insulating components of the iron core legs into the slot)

[0140] Next, in step S3, a sheet-shaped iron core leg insulating member 20 for insulating the slot 12 from the coil section 30 is inserted into the slot 12.

[0141] (The process of placing the second conductor into the slot)

[0142] Next, in step S4, the second legs 81 of the plurality of second conductors 80 disposed on one side (Z1 direction side) of the stator core 10 are inserted from the axial side (Z1 direction side) of the stator core 10 into the slots 12 of the stator core 10. Thus, the plurality of second conductors 80 are disposed on one side (Z1 direction side) of the stator core 10.

[0143] (Process of assembling insulating components at the joint)

[0144] Next, in step S5, after the plurality of second conductors 80 are disposed in the slot 12, a sheet-like joint insulating member 21 is disposed in one of the slots 12 between the second legs 81 of the radially adjacent second conductors 80.

[0145] (The process of placing the first conductor into the slot)

[0146] Next, in step S6, the plurality of first conductors 70 are moved relative to the stator core 10 from the other side (Z2 direction side) of the stator core 10 in the axial direction. This inserts the first leg 71 of the first conductor 70 into the slot 12. Thus, the plurality of first conductors 70 are positioned on the other side (Z2 direction side) of the stator core 10 in the axial direction.

[0147] Furthermore, within all slots 12, the first leg 71 of the first conductor 70 and the second leg 81 of the second conductor 80 are arranged in the slots 12 in an alternating manner with the end 71a of the first leg 71 and the end 81a of the second leg 81. In this case, when inserting the first leg 71 of the first conductor 70, interference between the first leg 71 and the second leg 81 can be easily avoided by tilting the first leg 71 radially inward or by inserting the first leg 71 radially outward in a staggered manner.

[0148] (The process of joining the first leg and the second leg)

[0149] Next, in step S7, the first surface 71c of the first leg 71 and the second surface 81c of the second leg 81 are joined by pressing the multiple segmented conductors 40 (end 71a and end 81a) radially.

[0150] [Second Implementation]

[0151] Next, refer to Figure 1 , Figure 3 as well as Figures 19-25 The stator 200 of the second embodiment will be described. The stator 200 of the second embodiment differs from that of the first embodiment in that it does not have an insulating layer provided on the first leg 171 and the second leg 181. Furthermore, structures identical to those in the first embodiment are illustrated using the same symbols as in the first embodiment, and their descriptions are omitted.

[0152] [Stabilizer Structure]

[0153] Reference Figure 1 , Figure 3 as well as Figures 19-24 The construction of the stator 200 according to the second embodiment will be described. Furthermore, the stator 200 is an example of the "armature" as defined in the claims.

[0154] like Figure 1 As shown, the stator 200 and rotor 101 together constitute part of the rotary electric motor 202. Additionally, as... Figure 19 As shown, the stator 200 includes a sheet-like insulating component 120 and a coil portion 130 (see reference). Figure 1 Additionally, the coil section 130 includes a first coil assembly 130a (reverse lead side coil) (see reference). Figure 21 ) and second coil assembly 130b (lead-side coil) (refer to) Figure 21 Additionally, the coil section 130 consists of multiple segmented conductors 140 (see reference). Figure 20 )constitute.

[0155] Construction of the first and second conductors

[0156] like Figure 20 As shown, the multiphase first conductor 170 includes a pair of first legs 171 and a first transition portion 172. The first transition portion 172 has a first curved portion 172a and a pair of first inclined portions 172b. Furthermore, although it has the same structure as the first conductor 170, Figure 20 The diagram is omitted, but the multiphase second conductor 180 includes a pair of second legs 181 (see reference). Figure 21 ) and the second transition section 182 (refer to) Figure 21 Additionally, the second transition portion 182 has a second curved portion 182a (see reference). Figure 21 ) and a pair of second diagonal sections 182b (see reference) Figure 21 The first leg 171 and the second leg 181 have approximately equal lengths (see reference). Figure 21 ).

[0157] Here, in the second embodiment, the insulation performance of the first transition portion 172 and the second transition portion 182 is higher than that of the first leg 171 and the second leg 181. Specifically, a pair of first legs 171 (second legs 181) in the segmented conductor 140 are not provided with an insulation layer. That is, the first legs 171 (second legs 181) are not covered by an insulation layer, and the conductor surface 140b is exposed.

[0158] Furthermore, insulating layers are provided on portions of the first transition portion 172 arranged in a manner where at least the first transition portions 172 of different phases are adjacent to each other, and on portions of the second transition portion 182 arranged in a manner where at least the second transition portions 182 of different phases are adjacent to each other. Specifically, the first curved portion 172a and the pair of first oblique portions 172b of the first transition portion 172 are each covered by an insulating layer 174. Additionally, the second curved portion 182a and the pair of second oblique portions 182b of the second transition portion 182 are each covered by an insulating layer 184 (see reference 184). Figure 21 ) Coverage. Furthermore, in Figure 20 Although only the first conductor 170 is shown in the diagram, the second conductor 180 is also omitted from the diagram.

[0159] In addition, such as Figure 21 As shown, the stator 200 has leaf spring members 210 in each of the multiple slots 12, which are disposed between the coil portion 130 and the opening 12a (protrusion 13b) of the slot 12. That is, the leaf spring members 210 are disposed in the front end gap 12b provided radially inward within the slot 12. The leaf spring members 210 are composed of leaf spring members that can flex and deform in the R direction. The leaf spring members 210 are configured to maintain the contact state of the contact portion 190 (described later) by pressing the coil portion 130 from the R1 side.

[0160] Furthermore, the leaf spring component 210 has a leaf spring shape that is bent along the Z direction. Specifically, the leaf spring component 210 is formed by bending a metal plate such as SUS (stainless steel) that extends along the Z direction along the Z direction. The leaf spring component 210 has a length L3 in the Z direction that is greater than that of the stator core 10 (see reference). Figure 19 The length L4 in the small Z direction. In addition, the leaf spring component 210 preferably has an action force (elastic force), is a non-magnetic body, and is made of a heat-resistant material (e.g., Inconel (registered trademark)).

[0161] The leaf spring component 210 presses the coil portion 130 radially inward, causing the first surface 171a of the first leg 171 of the first conductor 170 to contact the second surface 181a of the second leg 181 of the second conductor 180. A contact portion 190 is formed by the contact between the first surface 171a of the first leg 171 and the second surface 181a of the second leg 181. Furthermore, the contact portion 190 is an example of the "joint portion" in the claims.

[0162] The first surface 171a and the second surface 181a are in contact with each other by pressing them together without using a bonding material, by the leaf spring member 210. That is, the first surface 171a and the second surface 181a are not engaged, and the contact between the first surface 171a and the second surface 181a is maintained by the pressing force based on the leaf spring member 210.

[0163] Furthermore, multiple contact portions 190 are respectively disposed within the slot 12 at the axial central portion P1 of the stator core 10. Additionally, a leaf spring member 210 is also disposed at the axial central portion P1 of the stator core 10. Specifically, when viewed radially, the leaf spring member 210 is arranged to overlap with each of the multiple contact portions 190.

[0164] In addition, the first surface 171a and the second surface 181a are respectively plated. That is, the plated surfaces are in contact with each other (the first surface 171a and the second surface 181a).

[0165] In addition, metals such as Ni, Ag, Au, and Sn are used in the plating process. Furthermore, multiple metals from the aforementioned sources (such as Ni and Ag) can also be used for plating.

[0166] like Figure 22 As shown, the first leg 171 includes a first surface configuration portion 171b, a front end portion 171c, a first leg body portion 171d, and a first step portion 171e. A gap portion 171f is provided between the first step portion 171e and the front end portion 181c of the second leg 181.

[0167] In addition, the second leg 181 includes a second surface configuration portion 181b, a front end portion 181c, a second leg body portion 181d, and a second step portion 181e. A gap portion 181f is provided between the second step portion 181e and the front end portion 171c of the first leg 171.

[0168] Furthermore, the first surface configuration portion 171b and the second surface configuration portion 181b are disposed at the central portion P1 in the axial direction of the stator core 10 (see reference). Figure 21 ).

[0169] Additionally, the stator 200 includes an insulating component 120. The insulating component 120 includes an insulating layer made of polyphenylene sulfide resin (PPS), aramid paper, etc. The insulating component 120 is formed in sheet form. The insulating component 120 includes a first insulating portion 121 for electrically insulating the stator core 10 from the coil portion 130, and a second insulating portion 122 for electrically insulating the segmented conductors 140, whose legs (171, 181) are inserted into the same slot 12, from each other.

[0170] like Figure 23 As shown, a first insulating portion 121 is disposed within the slot 12 at least between the inner side surface 12c of the slot 12 and the legs (171, 181). Specifically, the first insulating portion 121 includes a portion 121a extending linearly around the entire region 12d within the slot 12 where the segmented conductors 140 are disposed. The linearly extending portion 121a is configured to surround almost the entire periphery of the region 12d.

[0171] The second insulating portion 122 is provided within the slot 12 at least between the plurality of legs (171, 181) inserted into the same slot 12. Specifically, the second insulating portion 122 includes a serpentine portion 122a having a serpentine shape extending from the segmented conductor 140 disposed on the R1 side within the same slot 12 to the segmented conductor 140 disposed on the R2 side. The serpentine portion 122a serpentine relative to the segmented conductors 140 adjacent in the R direction, extending in the A direction between the segmented conductors 140 and in the R direction between the segmented conductors 140 and the inner surface 12c of the slot 12. That is, the serpentine portion 122a includes a portion 122b extending in the A direction between the segmented conductors 140 and the stator core 10, and a portion 122c extending in the R direction between the segmented conductors 140 and the inner surface 12c of the slot 12. From the R1 side toward the R2 side, the second insulating portion 122 is formed continuously in the order of portions 122b and 122c on one side of the A direction, and portions 122b and 122c on the other side of the A direction. Furthermore, the serpentine portion 122a is connected to the linearly extending portion 121a of the first insulating portion 121, thereby forming the second insulating portion 122 and the first insulating portion 121 as a single unit.

[0172] In addition, such as Figure 24 As shown, the first insulating portion 121 includes an insulating layer 121b. Additionally, the first insulating portion 121 includes a fixing layer 121d having a foaming agent 121c that foams upon heating. The fixing layer 121d expands due to the foaming agent 121c, thereby fixing the first leg 171 and the second leg 181 relative to the stator core 10 at least axially. The fixing layer 121d of the first insulating portion 121 is configured to bond and fix the first leg 171 and the second leg 181 to the stator core 10 respectively. The fixing layer 121d is provided on both sides of the insulating layer 121b. When the fixing layer 121d is heated, a thermosetting resin 121e cures. Therefore, it is not necessary to use paint or the like to fix the first leg 171 and the second leg 181 separately. Furthermore, in Figure 24 In the illustration, the first insulating portion 121 is shown with a thickness greater than its actual size to emphasize its position. Additionally, in... Figure 24 For simplicity, the stator core 10 and other components are omitted from the illustration. Furthermore, although the illustration is omitted, the second insulating portion 122 has the same structure (composition) as the first insulating portion 121.

[0173] (Stator manufacturing process)

[0174] Next, refer to Figure 25 The manufacturing method (process) of stator 200 is described.

[0175] like Figure 25As shown, firstly, in step S11, a preparation process for the segmented conductor 140 is performed. Specifically, no insulating layer is provided on the first leg 171 (second leg 181), and an insulating layer (174, 184) is formed on the first transition portion 172 (second transition portion 182) of the first conductor 170 (second conductor 180).

[0176] Next, in step S12, the insulating component 120 is positioned (inserted) into the slot 12.

[0177] Next, in step S13, the second leg 181 of the second conductor 180 (refer to) is connected from the other side of the axial direction (Z1 direction side). Figure 21 Insert it into slot 12.

[0178] Next, in step S14, the first leg 171 of the first conductor 170 (refer to) is connected from one side of the axial direction (Z2 direction side). Figure 21 Insert it into the slot 12. At this time, the first leg 171 is configured such that the first surface 171a of the first leg 171 is opposite to the second surface 181a of the second leg 181.

[0179] Next, in step S15, the leaf spring component 210 (refer to...) Figure 21 It is inserted from one side of the axial direction (e.g., the Z1 direction side) into the front end gap 12b in the slot 12.

[0180] Then, in step S16, the stator core 10 is heated and the fixing layer 121d is heated, whereby the foaming agent 121c foams while the fixing layer 121d expands. As a result, the coil portion 130 is fixed relative to the slot 12 at least axially.

[0181] [Effects of the first and second embodiments]

[0182] In this embodiment, the following effects can be achieved.

[0183] In the first and second embodiments, as described above, the insulated voltage values ​​of the first transition portion (72, 172) and the second transition portion (82, 182) of the armature (100, 200) are higher than those of the first leg (71, 171) and the second leg (81, 181). Therefore, the first transition portion (72, 172) and the second transition portion (82, 182) can be insulated more reliably, respectively.

[0184] Furthermore, before the first leg (71, 171) and the second leg (81, 181) engage, the first segment conductor (70, 170) and the second segment conductor (80, 180) are arranged independently (separately). In this case, the first segment conductor (70, 170) is moved in one direction along the axial direction (the direction in which the first leg (71, 171) is provided on the first transition portion (72, 172), and the second segment conductor (80, 180) is moved in the other direction along the axial direction (the direction in which the second leg (81, 181) is provided on the second transition portion (82, 182), thereby arranging the first leg (71, 171) and the second leg (81, 181) in a close manner and engaging with each other. Therefore, without inserting the first transition portions (72, 172) and the second transition portions (82, 182) axially into the slot (12), the first leg (71, 171) and the second leg (81, 181) can approach and engage with each other. As a result, the transition portions (72, 82, 172, 182) do not pass through the slot (12), thus preventing damage to the transition portions (72, 82, 172, 182) that have undergone insulation treatment (formation of insulation layers (74, 84, 174, 184)) to improve insulation performance (insulated voltage value).

[0185] Furthermore, unlike the case where at least one of the first transition portions (72, 172) and the second transition portions (82, 182) is inserted axially into the slot (12), the segmented conductors (40, 140) can be positioned in the slot (12) with the first transition portions (72, 172) joined to each other (and the second transition portions (82, 182) joined to each other) pre-connected. That is, it is not necessary to join the first transition portions (72, 172) to each other (and the second transition portions (82, 182) joined to each other) by welding or other joining processes after the segmented conductors (40, 140) are positioned in the slot (12). As a result, it is possible to prevent damage to the transition portions (72, 82, 172, 182) (damage to the insulating layers (74, 84, 174, 184)) caused by the joining process.

[0186] As a result, when the segmented conductors (40, 140) are arranged axially in the armature core (10), the transition portions (72, 82, 172, 182) can be more reliably insulated from each other, and the damage to the insulated transition portions (72, 82, 172, 182) (damage to the insulation layer (74, 84, 174, 184)) can be prevented.

[0187] Furthermore, in the first embodiment, as described above, a first leg-side insulating layer (73) is provided on each of the pair of first legs (71), and a second leg-side insulating layer (83) is provided on each of the pair of second legs (81). Additionally, in the portion of the first transition portion (72) where at least the first transition portions (72) of different phases are arranged adjacent to each other, a first transition portion-side insulating layer (74) thicker than the first leg-side insulating layer (73) is provided. Similarly, in the portion of the second transition portion (82) where at least the second transition portions (82) of different phases are arranged adjacent to each other, a second transition portion-side insulating layer (84) thicker than the second leg-side insulating layer (83) is provided. With this configuration, compared to the case where at least one of the first transition portion (72) and the second transition portion (82) is inserted axially into the slot (12), it is possible to prevent an increase in the axial opening area of ​​the slot (12) and to prevent the armature core (10) from becoming too large. Therefore, when the first segment conductor (70) and the second segment conductor (80) are arranged axially in the armature core (10), even if the thickness (t3+t4) of the first transition side insulation layer (74) is greater than the thickness (t1) of the first leg side insulation layer (73) and the thickness (t5+t6) of the second transition side insulation layer (84) is greater than the thickness (t2) of the second leg side insulation layer (83), the armature core (10) can be prevented from becoming too large compared to the case where at least one of the first transition portion (72) and the second transition portion (82) is inserted axially into the slot (12).

[0188] Furthermore, by not inserting the first transition portion (72) and the second transition portion (82) into the slot (12) respectively, the first leg (71) and the second leg (81) can be brought close together, thus eliminating the need to insert the coil portion (30) from the radial inside. As a result, it is possible to prevent the insulation layer (74, 84) of the transition portions (72, 82) from being damaged due to radial pressure during insertion from the radial inside. Moreover, it is possible to prevent the gap between adjacent transition portions (72, 82) from being crushed due to the formation of additional insulation layers (74c, 84c) from radial pressure during insertion from the radial inside. In addition, by moving the first segment conductor (70) and the second segment conductor (80) axially respectively, the legs (71, 81) can be positioned in the slot (12) without using multiple armature cores (10) that are divided circumferentially and moving the divided armature cores (10) radially. As a result, compared with the case where the armature core (10) is divided, it is possible to prevent the deterioration of the losses of the armature core (10) (such as iron loss caused by increased magnetic resistance).

[0189] Furthermore, by not inserting the first transition portion (72) and the second transition portion (82) into the slot (12) respectively, the first leg (71) and the second leg (81) can be brought close together, thus eliminating the need to enlarge the area of ​​the slot (12) in plan view. As a result, it is possible to prevent the size of the armature core (10) from increasing and to prevent the deterioration of armature (10) losses.

[0190] In addition, in the first embodiment, as described above, the first transition-side insulating layer (74) includes: a first base insulating layer (74a) integrally formed with the first leg-side insulating layer (73) and having a thickness (t3) equal to the thickness (t1) of the first leg-side insulating layer (73); and a first additional insulating layer (74c) disposed on the surface (74b) of the first base insulating layer (74a). Furthermore, the second transition-side insulating layer (84) includes: a second base insulating layer (84a) integrally formed with the second leg-side insulating layer (83) and having a thickness (t5) equal to the thickness (t2) of the second leg-side insulating layer (83); and a second additional insulating layer (84c) disposed on the surface (84b) of the second base insulating layer (84a). With this configuration, the thickness (t3+t4) of the first transition side insulation layer (74) can be easily increased by the thickness (t4) of the first additional insulation layer (74c) compared to the thickness (t1) of the first leg side insulation layer (73). Furthermore, the thickness (t5+t6) of the second transition side insulation layer (84) can be easily increased by the thickness (t6) of the second additional insulation layer (84c) compared to the thickness (t2) of the second leg side insulation layer (83). As a result, the first segment conductor (70) and the second segment conductor (80) can be easily disposed in the armature core (10), and adjacent first transition portions (72) and adjacent second transition portions (82) can be more reliably and easily insulated from each other.

[0191] In the first embodiment, as described above, a plurality of first legs (71) and a plurality of second legs (81) are arranged radially within a slot (12). Furthermore, a plurality of first transition portions (72) are arranged radially on the other side of the axial direction of the slot (12). Additionally, a plurality of second transition portions (82) are arranged radially on one side of the axial direction of the slot (12). Furthermore, at least a portion of the radially arranged first transition portions (72), between the portion of the first transition portion (72) where a first transition portion-side insulating layer (74) is provided and the first leg (71), is provided with a first inclined portion (72c) that is inclined radially to one side. Furthermore, at least a portion of the radially arranged second transition portions (82), between the portion of the second transition portion (82) where a second transition portion-side insulating layer (84) is provided and the second leg (81), is provided with a second inclined portion (82c) that is inclined radially to one side. With this configuration, by providing the first inclined portion (72c), the first transition portion (72) can be offset from the radial side of the first leg portion (71). Furthermore, by providing the second inclined portion (82c), the second transition portion (82) can be offset from the radial side of the second leg portion (81). As a result, the size of the gap between the radially adjacent first transition portions (71) can be easily adjusted by the inclination angle (θ1) of the first inclined portion (72c). Similarly, the size of the gap between the radially adjacent second transition portions (82) can be easily adjusted by the inclination angle (θ2) of the second inclined portion (82c).

[0192] Furthermore, in the first embodiment, as described above, the plurality of first inclined portions (72c) and the plurality of second inclined portions (82c) are arranged radially. Additionally, the inclination angle (θ1) of the first inclined portion (72c) on one radial side relative to the axial direction is greater than that of the first inclined portion (72c) on the other radial side. Furthermore, the inclination angle (θ2) of the second inclined portion (82c) on one radial side relative to the axial direction is greater than that of the second inclined portion (82c) on the other radial side. With this configuration, a gap can be reliably provided between adjacent first transition portions (71) and between adjacent second transition portions (82). Therefore, a first transition portion-side insulating layer (74) can be easily provided in the gap between adjacent first transition portions (71), and a second transition portion-side insulating layer (84) can be easily provided in the gap between adjacent second transition portions (82).

[0193] Furthermore, in the first embodiment, as described above, a plurality of first legs (71) of the same phase are arranged radially within a slot (12), and a plurality of second legs (81) of the same phase are arranged radially. With this configuration, it is possible to prevent excessive increase in the voltage difference between the first legs (71) and between the second legs (81) within the slot (12). As a result, even in a structure where the thickness (t1) of the first leg-side insulating layer (73) is less than the thickness (t3+t4) of the first transition-side insulating layer (74) and the thickness (t2) of each of the second leg-side insulating layers (83) is less than the thickness (t5+t6) of the second transition-side insulating layer (84), adjacent first legs (71) can be reliably insulated from each other, and adjacent second legs (81) can be reliably insulated from each other.

[0194] In addition, in the first embodiment, as described above, the armature (100) includes a sheet-shaped core leg insulating member (20), which is independently disposed between the slot (12) and the coil portion (30) and is provided independently of the first leg-side insulating layer (73) and the second leg-side insulating layer (83). Furthermore, the armature (100) includes a sheet-shaped joint insulating member (21), which is independently disposed of the core leg insulating member (20) and insulates adjacent joints (90) radially within a slot (12). Additionally, the core leg insulating member (20) and the joint insulating member (21) are independently disposed of with respect to the first transition-side insulating layer (74) and the second transition-side insulating layer (84), respectively. If configured in this way, even if the first transition side insulation layer (74) and the second transition side insulation layer (84) are damaged, the insulation between the slot (12) and the coil section (30) can be ensured by the core leg insulation member (20). In addition, even if the first transition side insulation layer (74) and the second transition side insulation layer (84) are damaged, the insulation between the joints (90) can be ensured by the joint insulation member (21).

[0195] Furthermore, in the first embodiment, as described above, the first transition portion (72) has a first curved portion (72a) that bends at the center of the first transition portion (72), and a pair of first oblique portions (72b) that extend in a straight line from the first curved portion (72a) toward the pair of first legs (71). The second transition portion (82) has a second curved portion (82a) that bends at the center of the second transition portion (82), and a pair of second oblique portions (82b) that extend in a straight line from the second curved portion (82a) toward the pair of second legs (81). Furthermore, first transition portion side insulating layers (74) are respectively provided on the first curved portion (72a) and the pair of first oblique portions (72b). Furthermore, second transition portion side insulating layers (84) are respectively provided on the second curved portion (82a) and the pair of second oblique portions (82b). With this configuration, compared to the case where the first transition portion side insulating layer (74) is only provided on one side of the first bend (72a) and the pair of first oblique portions (72b), adjacent first transition portions (72) can be more reliably insulated from each other. Furthermore, compared to the case where the second transition portion side insulating layer (84) is only provided on one side of the second bend (82a) and the pair of second oblique portions (82b), adjacent second transition portions (82) can be more reliably insulated from each other.

[0196] Furthermore, in the first embodiment, as described above, the first additional insulating layer (74c) provided on the first transition side insulating layer (74) of the first curved portion (72a) is integrally provided with the first additional insulating layer (74c) provided on the first transition side insulating layer (74) of each of the pair of first inclined portions (72b). Additionally, the second additional insulating layer (84c) provided on the second transition side insulating layer (84) of the second curved portion (82a) is integrally provided with the second additional insulating layer (84c) provided on the second transition side insulating layer (84) of each of the pair of second inclined portions (82b). With this configuration, compared to the case where the first additional insulating layer (74c) of the first curved portion (72a) and the first additional insulating layer (74c) of each of the pair of first inclined portions (72b) are provided independently, the number of components can be reduced, and the number of forming steps for the first additional insulating layer (74c) can be reduced. Furthermore, compared to the case where the second additional insulating layer (84c) of the second curved portion (82a) and the second additional insulating layer (84c) of each of the pair of second oblique portions (82b) are provided independently, the number of components can be reduced, and the number of forming steps of the second additional insulating layer (84c) can be reduced.

[0197] Furthermore, in the first embodiment, as described above, the first transition-side insulating layer (74) is configured to circumferentially surround the first transition portion (72) in a cross section orthogonal to the direction in which the first transition portion (72) extends. Similarly, the second transition-side insulating layer (84) is configured to circumferentially surround the second transition portion (82) in a cross section orthogonal to the direction in which the second transition portion (82) extends. With this configuration, compared to the case where a portion of the first transition portion (72) is covered by the first transition-side insulating layer (74) in a cross section orthogonal to the direction in which the first transition portion (72) extends, adjacent first transition portions (72) can be more reliably insulated from each other. Furthermore, compared to the case where the first transition-side insulating layer (74) is formed in a cross section orthogonal to the direction in which the first transition portion (72) extends, covering only a portion of the first transition portion (72), it is not necessary to control (adjust) the formation of the first transition-side insulating layer (74) in a way that prevents partial formation; therefore, the first transition-side insulating layer (74) can be formed more easily. Furthermore, compared to the case where a portion of the second transition portion (82) is covered by the second transition portion-side insulating layer (84) in a cross section orthogonal to the direction in which the second transition portion (82) extends, adjacent second transition portions (82) can be more reliably insulated from each other. Additionally, compared to the case where the second transition portion-side insulating layer (84) is formed in a cross section orthogonal to the direction in which the second transition portion (82) extends, covering a portion of the second transition portion (82), there is no need to control (adjust) the formation of the second transition portion-side insulating layer (84) in a non-partial manner, thus making it easier to form the second transition portion-side insulating layer (84).

[0198] Furthermore, in the second embodiment, as described above, no insulating layer is provided on either the pair of first legs (171) or the pair of second legs (181). In addition, insulating layers (174, 184) are provided on portions of the first transition section (172) where at least the first transition sections (172) of different phases are arranged adjacent to each other, and on portions of the second transition section (182) where at least the second transition sections (182) of different phases are arranged adjacent to each other. With this configuration, insulation between the transition sections (172, 182) can be ensured, and the occupancy of the coil portion (130) within the slot (12) can be increased to the size of the legs (171, 181) where no insulating layer is provided.

[0199] Furthermore, in the first and second embodiments, as described above, the first transition portion (72, 172) has a first curved portion (72a, 172a) that curves at the center of the first transition portion (72, 172), and a pair of first oblique portions (72b, 172b) extending from the first curved portion (72a, 172a) toward the pair of first legs (71, 171). The second transition portion (82, 182) has a second curved portion (82a, 182a) that curves at the center of the second transition portion (82, 182), and a pair of second oblique portions (82b, 182b) extending from the second curved portion (82a, 182a) toward the pair of second legs (81, 181). The pair of first oblique portions (72b, 172b) extend in an intersecting manner and are arranged in a radially offset manner. Similarly, the pair of second oblique portions (82b, 182b) extend in an intersecting manner and are arranged in a radially offset manner. Furthermore, at least one of the pair of first oblique portions (72b, 172b) has a portion (72e) partially disposed on a radially oriented surface (72d) and adjacent to a first transition portion (72, 172) of a different phase. At least one of the pair of second oblique portions (82b, 182b) has a portion (82e) partially disposed on a radially oriented surface (82d) and adjacent to a second transition portion (82, 182) of a different phase. With such a configuration, compared to the case where the entire surface (72d) of the first oblique portions (72b, 172b) (and the entire surface (82d) of the second oblique portions (82b, 182b)) is adjacent to each other of a different phase, the radially adjacent transition portions (72, 82, 172, 182) can be more reliably insulated from each other.

[0200] Furthermore, in the first and second embodiments, as described above, the pair of first legs (71, 171) are configured such that their radial positions are offset from each other by the radial width (W11) of the first legs (71, 171). Similarly, the pair of second legs (81, 181) are configured such that their radial positions are offset from each other by the radial width (W12) of the second legs (81, 181). The pair of first diagonal portions (72b, 172b) are configured such that their radial positions are offset from each other by the radial width (W11) of the first legs (71, 171). The pair of second diagonal portions (82b, 182b) are configured such that their radial positions are offset from each other by the radial width (W12) of the second legs (81, 181). With this configuration, a pair of first legs (71, 171) can be arranged in radially adjacent channels (a conductor arrangement area in a ring shape), and a pair of first oblique portions (72b, 172b) can be arranged in radially adjacent channels. Furthermore, a pair of second legs (81, 181) can be arranged in radially adjacent channels, and a pair of second oblique portions (82b, 182b) can be arranged in radially adjacent channels.

[0201] Furthermore, in the first and second embodiments, as described above, all the first legs (71, 171) and the second legs (81, 181) respectively disposed in the multiple slots (12) are in phase with each other. With this configuration, legs (71, 81, 171, 181) that are not in phase with each other are not adjacent to each other within a slot (12), thus reducing the insulation performance of the legs (71, 81, 171, 181). As a result, there is no need to perform insulation treatment such as providing a thick insulating film on the legs (71, 81, 171, 181), thus further increasing the occupancy rate of the coil portions (30, 130) within the slot (12).

[0202] [Variation Example]

[0203] Furthermore, the embodiments disclosed herein should be considered illustrative in all respects and not restrictive. The scope of the invention is not limited to the description of the embodiments above, but extends to the claims, and includes all modifications (variations) of the same meaning and scope as the claims.

[0204] For example, in the first embodiment described above, an example is shown where a first additional insulating layer 74c is provided in the first transition portion 72 and a second additional insulating layer 84c is provided in the second transition portion 82, but the present invention is not limited thereto. For example, in the state where the first additional insulating layer 74c is not provided, the thickness t3 of the first basic insulating layer 74a may be greater than the thickness t1 of the insulating layer 73 (first leg-side insulating layer). In addition, in the state where the second additional insulating layer 84c is not provided, the thickness t5 of the second basic insulating layer 84a may be greater than the thickness t2 of the insulating layer 83 (second leg-side insulating layer).

[0205] Furthermore, although the first embodiment described above shows an example where a first additional insulating layer 74c is provided in the first curved portion 72a and a second additional insulating layer 84c is provided in the second curved portion 82a, the present invention is not limited thereto. For example, the first additional insulating layer 74c may not be provided in the first curved portion 72a and the second additional insulating layer 84c may not be provided in the second curved portion 82a.

[0206] Furthermore, although the first embodiment described above shows an example where a first additional insulating layer 74c is integrally provided in the first oblique portion 72b and a second additional insulating layer 84c is integrally provided in the second oblique portion 82b, the present invention is not limited to this. For example, if there are portions in the first oblique portion 72b that are not arranged adjacent to each other in different phases, the first additional insulating layer 74c may not be provided in those portions. Similarly, if there are portions in the second oblique portion 82b that are not arranged adjacent to each other in different phases, the second additional insulating layer 84c may not be provided in those portions.

[0207] Furthermore, although the first embodiment described above shows an example in which a first inclined portion 72c is provided on all first transition portions 72 arranged radially in a slot 12 except for the radially innermost first transition portion 72, the present invention is not limited to this. For example, the first inclined portion 72c may be provided on all of the radially arranged first transition portions 72. Similarly, the second inclined portion 82c may be provided on all of the radially arranged second transition portions 82.

[0208] Furthermore, although the first inclined portion 72c and the second inclined portion 82c are shown in the first embodiment described above as being inclined radially outward, the present invention is not limited thereto. For example, the first inclined portion 72c and the second inclined portion 82c may be inclined radially inward. Alternatively, the first inclined portion 72c and the second inclined portion 82c may be inclined in opposite directions radially.

[0209] Furthermore, although the first additional insulating layer 74c of the insulating layer 74 (first transition side insulating layer) provided in the first curved portion 72a and the first additional insulating layer 74c of the insulating layer 74 (first transition side insulating layer) respectively provided in the pair of first inclined portions 72b are shown as integrally provided, the present invention is not limited thereto. For example, the first additional insulating layer 74c of the insulating layer 74 (first transition side insulating layer) and the first additional insulating layer 74c of the insulating layer 74 (first transition side insulating layer) respectively provided in the pair of first inclined portions 72b may be provided independently of each other. Similarly, the second additional insulating layer 84c of the insulating layer 84 (second transition side insulating layer) and the second additional insulating layer 84c of the insulating layer 84 (second transition side insulating layer) respectively provided in the pair of second inclined portions 82b may be provided independently of each other.

[0210] Furthermore, although the first additional insulating layer 74c and the first basic insulating layer 74a are shown to be formed of the same material, and the second additional insulating layer 84c and the second basic insulating layer 84a are also shown to be formed of the same material, the present invention is not limited thereto. For example, the first additional insulating layer 74c and the first basic insulating layer 74a may be formed of different materials, and the second additional insulating layer 84c and the second basic insulating layer 84a may also be formed of different materials.

[0211] Furthermore, although the first embodiment described above shows an example of forming components (30a, 30b) after forming the first additional insulating layer 74c and the second additional insulating layer 84c, the present invention is not limited thereto. For example, the first additional insulating layer 74c and the second additional insulating layer 84c may be formed after forming components (30a, 30b). Alternatively, the first additional insulating layer 74c and the second additional insulating layer 84c may be formed when components (30a, 30b) are partially formed (when only a portion of the segmented conductors (40) are combined).

[0212] Furthermore, although the first embodiment described above shows an example where the joint 90 is disposed within the slot 12, the present invention is not limited thereto. For example, a portion of the joint 90 may also be disposed within the slot 12 (see [reference]). Figure 26 Alternatively, the joint 90 can be integrally disposed on the outside of the slot 12 (see reference). Figure 27 ).

[0213] Furthermore, although the first embodiment described above shows an example in which a joint portion 90 is provided on the other side (Z2 direction side) of the axial direction within the slot 12 of the stator core 10 (armature core), the present invention is not limited thereto. For example, the joint portion 90 may also be provided at the center or on one side (Z1 direction side) of the axial direction of the stator core 10 (armature core).

[0214] Furthermore, although examples of multiple combinations of first legs 71 (171) and second legs 81 (181) are shown in the first and second embodiments described above, the present invention is not limited to this. It is also possible to have a structure in which only one combination of first legs 71 (171) and second legs 81 (181) is provided in the slot 12.

[0215] Furthermore, although the first embodiment described above shows an example where a pair of first legs 71 of the first conductor 70 have equal lengths (L1) and a pair of second legs 81 of the second conductor 80 have equal lengths (L2), the present invention is not limited thereto. For example, the pair of first legs 271 of the first conductor 270 may also be configured to have different lengths (see [reference]). Figure 28A Furthermore, the pair of second legs 281 of the second segment conductor 280 have different lengths (see reference). Figure 28B That is, in this case, the first segment conductor 270 and the second segment conductor 280 each have a J-shape (approximately J-shaped).

[0216] Furthermore, although the first embodiment described above shows an example where the length of the second leg 81 is greater than the length of the first leg 71, the present invention is not limited thereto. For example, the length of the second leg 81 may be less than the length of the first leg 71.

[0217] Furthermore, although examples of an internal rotor type rotary motor 102 (202) in which the stator 100 (200) (armature) constitutes part of the first and second embodiments described above are shown, the present invention is not limited thereto. For example, the stator may also constitute part of an external rotor type rotary motor.

[0218] Furthermore, although examples have been shown in the first and second embodiments above where the second conductor 80 (180) is a conductor on the lead side and the first conductor 70 (170) is a conductor on the reverse lead side, the present invention is not limited thereto. For example, the second conductor 80 (180) may be a conductor on the reverse lead side and the first conductor 70 (170) may be a conductor on the lead side.

[0219] Furthermore, although the first embodiment described above shows an example where the core leg insulation member 20 and the joint insulation member 21 are sheet-like, the present invention is not limited thereto. The present invention can also be applied to stators that have core leg insulation members 20 and joint insulation members 21 that are not sheet-like.

[0220] Furthermore, although the second embodiment described above shows an example of an insulating member 120 with a basal body shape disposed in the slot 12, the present invention is not limited thereto. For example, an insulating member with a ladder shape may also be disposed in the slot 12.

[0221] Specifically, such as Figure 29 As shown, the insulating member 220 includes a first insulating portion 221 and a second insulating portion 222. The first insulating portion 221 is composed of an annular portion 221a arranged in a ring shape to surround the entire area 12d in the slot 12 where the segmented conductors 140 are disposed. The second insulating portion 222 is composed of inter-segment conductor portions 222a arranged in a manner that extend along the circumferential direction (A direction) of the stator core 10 between the segmented conductors 140 in the same slot 12. Moreover, the inter-segment conductor portions 222a are continuously formed with the annular portion 221a. That is, the annular portion 221a constituting the first insulating portion 221 and the inter-segment conductor portions 222a constituting the second insulating portion 222 are formed as a single unit. Furthermore, when viewed from the Z direction, the insulating member 220 has a ladder shape.

[0222] Furthermore, although the second embodiment described above shows an example where an insulating layer (174, 184) is provided in the transition portions (172, 182), the present invention is not limited thereto. If the insulation performance (insulating voltage value) of the transition portions (172, 182) is higher than that of the legs (171, 181), then an insulating layer (174, 184) may not be provided in the transition portions (172, 182).

[0223] Symbol Explanation

[0224] 10… Stator core (armature core); 12… Slot; 20… Core leg insulation component; 21… Joint insulation component; 30, 130… Coil section; 70, 170, 270… First conductor; 71, 171, 271… First leg; 71a… End (end on one axial side of the first leg); 71b… End (end on the other axial side of the first leg); 72, 172… First transition section; 72a, 172a… First bend; 72b, 172b… First sloping section ; 72c… First inclined portion; 72d… Surface (surface of the first inclined portion); 72e… Part (part of the first inclined portion); 73… Insulating layer (insulating layer on the first leg side); 74… Insulating layer (insulating layer on the first transition side); 74a… First base insulating layer; 74b… Surface (surface of the first base insulating layer); 74c… First additional insulating layer; 80, 180, 280… Second conductor; 81, 181, 281… Second leg; 81a… End (end on the other side of the axial direction of the second leg) ); 81b…end (end on one side of the axial direction of the second leg); 82, 182…second transition portion; 82a, 182a…second bend; 82b, 182b…second sloping portion; 82c…second inclined portion; 82d…face (face of the second sloping portion); 82e…part (part of the second sloping portion); 83…insulating layer (insulating layer on the side of the second leg); 84…insulating layer (insulating layer on the side of the second transition portion); 84a…second base insulating layer; 84b…surface (surface of the second base insulating layer) ; 84c…Second additional insulation layer; 90…Joint; 100, 200…Stator (armature); 174, 184…Insulation layer; 190…Contact (joint); t1…Thickness (thickness of the insulation layer on the first leg side); t2…Thickness (thickness of the insulation layer on the second leg side); t3…Thickness (thickness of the first base insulation layer); t5…Thickness (thickness of the second base insulation layer); θ1…Inclination angle (inclination angle of the first inclined portion); θ2…Inclination angle (inclination angle of the second inclined portion).

Claims

1. An armature, wherein, have: An armature core having a back yoke that is annular when viewed axially, a plurality of teeth protruding radially inward from the back yoke, and a plurality of slots extending axially, the plurality of slots being a portion surrounded by a wall portion of the back yoke located radially outward and the circumferential side surfaces of two adjacent teeth in the circumferential direction; and The coil section includes a multiphase first segmented conductor, a multiphase second segmented conductor, and a connecting portion. The first segmented conductor includes a pair of first legs extending along the axial direction to one side of the axial direction, and a first transition portion connecting the ends of the pair of first legs on the other side of the axial direction to each other. The second segmented conductor includes a pair of second legs extending along the axial direction to the other side of the axial direction, and a second transition portion connecting the ends of the pair of second legs on the other side of the axial direction to each other. The connecting portion engages the ends of the first legs on the axial direction to one side of the axial direction and the ends of the second legs on the other side of the axial direction within a slot or on the outer side of the axial direction of a slot. The plurality of teeth have a protrusion at the front end on the radially inner side. The opening of the slot has an opening width corresponding to the distance between the front ends of the protrusions of two adjacent teeth in the circumferential direction. The width corresponding to the distance between the circumferential sides of two adjacent teeth in the circumferential direction is greater than the opening width. The first leg of each of the plurality of first segment conductors is configured to be adjacent to each other with first legs that are in phase with each other. The second leg of each of the plurality of second segment conductors is configured to be adjacent to each other with second legs that are in phase with each other. The first transition portion of each of the plurality of first segment conductors is configured to be adjacent to each other with first transition portions of different phases. The second transition portion of each of the plurality of second segment conductors is configured to be adjacent to each other with second transition portions of different phases. The insulated voltage values ​​of the first transition portion and the second transition portion are higher than those of the first leg and the second leg. Each of the pair of first leg portions is provided with a first leg-side insulating layer. Each of the pair of second legs is provided with a second leg-side insulating layer. At least the portions of the first transition portion that are configured to be adjacent to each other with the first transition portions of different phases are provided with a first transition portion side insulation layer that is thicker than the first leg portion side insulation layer. At least the portion of the second transition portion that is configured to be adjacent to the second transition portion of a different phase is provided with a second transition portion side insulation layer that is thicker than the second leg side insulation layer.

2. The armature according to claim 1, wherein, The second leg-side insulation layer and the second transition-side insulation layer are made of the same material.

3. The armature according to claim 2, wherein, The first transition-side insulation layer includes: a first base insulation layer integrally formed with the first leg-side insulation layer and having a thickness equal to that of the first leg-side insulation layer; and a first additional insulation layer disposed on the surface of the first base insulation layer. The second transition side insulation layer includes: a second base insulation layer integrally formed with the second leg side insulation layer and having a thickness equal to that of the second leg side insulation layer; and a second additional insulation layer disposed on the surface of the second base insulation layer.

4. The armature according to claim 2 or 3, wherein, Within one of the slots, a plurality of first legs are arranged radially, and a plurality of second legs are arranged radially. On the other side of the axial direction of the slot, a plurality of the first transition portions are arranged radially. On one side of the axial direction of the slot, a plurality of second transition portions are arranged radially. At least a portion of the plurality of radially arranged first transition portions, between the portion of the first transition portion having the first transition portion-side insulating layer and the first leg portion, is provided a first inclined portion that slopes radially to one side. At least a portion of the plurality of radially arranged second transition portions, between the portion of the second transition portion having the second transition portion side insulating layer and the second leg portion, is provided a second inclined portion that is inclined to one side in a radial direction.

5. The armature according to claim 4, wherein, The plurality of first inclined portions and the plurality of second inclined portions are arranged radially, respectively. The first inclined portion on one radial side has a greater inclination angle relative to the axial direction than the first inclined portion on the other radial side. The second inclined portion on one radial side has a greater inclination angle relative to the axial direction than the second inclined portion on the other radial side.

6. The armature according to claim 4 or 5, wherein, Within one of the slots, the plurality of first legs, which are in phase with each other, are arranged radially, and the plurality of second legs, which are in phase with each other, are arranged radially.

7. The armature according to any one of claims 4 to 6, wherein, It also has: A sheet-like insulating component for the iron core legs, independently disposed from the first leg-side insulating layer and the second leg-side insulating layer, is positioned between the slot and the coil portion; and A sheet-like joint insulating component, disposed independently of the core leg insulating component, insulates radially adjacent joints from each other within one of the slots. The core leg insulation component and the joint insulation component are respectively provided independently of the first transition side insulation layer and the second transition side insulation layer.

8. The armature according to any one of claims 2 to 7, wherein, The first transition portion has a first curved portion that bends at the center of the first transition portion, and a pair of first oblique portions extending from the first curved portion toward the pair of first leg portions. The second transition portion has a second curved portion that bends at the center of the second transition portion, and a pair of second oblique portions extending from the second curved portion toward the pair of second legs. The first transition portion side insulating layer is respectively disposed on the first curved portion and the pair of first inclined portions. The second transition side insulating layer is respectively disposed on the second curved portion and the pair of second oblique portions.

9. The armature according to claim 8, wherein, The first transition-side insulation layer includes: a first base insulation layer integrally formed with the first leg-side insulation layer and having a thickness equal to that of the first leg-side insulation layer; and a first additional insulation layer disposed on the surface of the first base insulation layer. The second transition-side insulation layer includes: a second base insulation layer integrally formed with the second leg-side insulation layer and having a thickness equal to that of the second leg-side insulation layer; and a second additional insulation layer disposed on the surface of the second base insulation layer. The first additional insulating layer disposed on the first transition portion side insulating layer of the first curved portion and the first additional insulating layer disposed on the first transition portion side insulating layer of the pair of first inclined portions are integrally disposed thereon. The second additional insulating layer disposed on the second transition side insulating layer of the second curved portion is integrally disposed with the second additional insulating layer disposed on the second transition side insulating layer of the pair of second oblique portions.

10. The armature according to any one of claims 2 to 9, wherein, The insulating layer on the first transition portion side is configured to circumferentially surround the first transition portion in a cross section orthogonal to the direction in which the first transition portion extends. The insulating layer on the second transition side is configured to surround the second transition in a circumferential manner on a cross section orthogonal to the direction in which the second transition extends.

11. The armature according to claim 1, wherein, Neither the pair of first legs nor the pair of second legs are provided with an insulating layer. An insulating layer is provided in at least the portion of the first transition portion that is adjacent to the first transition portion of a different phase, and in at least the portion of the second transition portion that is adjacent to the second transition portion of a different phase.

12. The armature according to any one of claims 1 to 11, wherein, The first transition portion has a first curved portion that bends at the center of the first transition portion, and a pair of first oblique portions extending from the first curved portion toward the pair of first leg portions. The second transition portion has a second curved portion that bends at the center of the second transition portion, and a pair of second oblique portions extending from the second curved portion toward the pair of second legs. The pair of first oblique portions are configured to extend in an intersecting manner and to be radially offset from each other. The pair of second oblique portions are configured to extend in an intersecting manner and to be radially offset from each other. At least one of the pair of first oblique portions has a portion partially disposed on a radially oriented surface and adjacent to the first transition portions of different phases. At least one of the pair of second oblique portions has a portion partially disposed on a radially oriented surface and adjacent to a second transition portion of a different phase.

13. The armature according to claim 12, wherein, The pair of first legs are configured such that their radial positions are offset from each other by the radial width of the first legs. The pair of second legs are configured such that their radial positions are offset from each other by the radial width of the second legs. The pair of first oblique portions are configured such that their radial positions are offset from each other by the radial width of the first leg. The pair of second oblique portions are configured such that their radial positions are offset from each other by the radial width of the second leg.

14. The armature according to any one of claims 1 to 13, wherein, All of the plurality of first legs and the plurality of second legs respectively configured in the plurality of slots are in phase with each other.

15. An armature, wherein, have: An armature core having a back yoke that is annular when viewed axially, a plurality of teeth protruding radially inward from the back yoke, and a plurality of slots extending axially, the plurality of slots being a portion surrounded by a wall portion of the back yoke located radially outward and the circumferential side surfaces of two adjacent teeth in the circumferential direction; and The coil section includes a multiphase first segmented conductor, a multiphase second segmented conductor, and a connecting portion. The first segmented conductor includes a pair of first legs extending along the axial direction to one side of the axial direction, and a first transition portion connecting the ends of the pair of first legs on the other side of the axial direction to each other. The second segmented conductor includes a pair of second legs extending along the axial direction to the other side of the axial direction, and a second transition portion connecting the ends of the pair of second legs on the other side of the axial direction to each other. The connecting portion engages the ends of the first legs on the axial direction to one side of the axial direction and the ends of the second legs on the other side of the axial direction within a slot or on the outer side of the axial direction of a slot. The plurality of teeth have a protrusion at the front end on the radially inner side. The opening of the slot has an opening width corresponding to the distance between the front ends of the protrusions of two adjacent teeth in the circumferential direction. The width corresponding to the distance between the circumferential sides of two adjacent teeth in the circumferential direction is greater than the opening width. The first leg of each of the plurality of first segment conductors is configured to be adjacent to each other with first legs that are in phase with each other. The second leg of each of the plurality of second segment conductors is configured to be adjacent to each other with second legs that are in phase with each other. The first transition portion of each of the plurality of first segment conductors is configured to be adjacent to each other with first transition portions of different phases. The second transition portion of each of the plurality of second segment conductors is configured to be adjacent to each other with second transition portions of different phases. The insulated voltage values ​​of the first transition portion and the second transition portion are higher than those of the first leg and the second leg. Neither the pair of first legs nor the pair of second legs are provided with an insulating layer. An insulating layer is provided in at least the portion of the first transition portion that is adjacent to the first transition portion of a different phase, and in at least the portion of the second transition portion that is adjacent to the second transition portion of a different phase.

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