JP6096508B2 - Rotating machine - Google Patents

Description

  The present invention relates to a rotating machine such as a motor or a generator.

  Technologies related to motors as rotating machines have been proposed. Patent Document 1 discloses a technique related to a rotating electrical machine having Y-connected multiphase windings. In a rotating electrical machine, each phase winding has multiple thin wires. Patent Document 2 discloses a technique related to a magnet motor. The stator of the magnet motor is provided with stator teeth and slots. A coil bobbin around which an electric wire is wound is press-fitted into the stator teeth. Patent Document 3 discloses a technique related to a stator of a motor. The stator includes a substantially annular yoke in plan view and a plurality of teeth protruding radially inward from the yoke, and includes a slot between two adjacent teeth. A first coil and a second coil having different phases are formed on two adjacent teeth, respectively. In the common slot, the first coil is formed on the yoke side, and the second coil is formed so as to be stacked stepwise on the radially inner side of the teeth with respect to the first coil.

Japanese Patent Laid-Open No. 10-80085 JP 2002-218893 A JP 2010-213493 A

  In a stator included in a rotating machine such as a motor or a generator, a conducting wire forming a coil may be a thick line. If the conductive wire is a thick wire, the conductive wire cannot be wound smoothly when the coil is formed, and the height of the coil end portion may increase. When the height of the coil end portion is increased, the dimensions of the stator may increase in the stacking direction in which the steel plates forming the stator core are stacked. As a result, it may be difficult to reduce the thickness of the rotating machine.

  An object of this invention is to provide the rotary machine provided with the stator of the new structure which makes the height of a coil end part low and can be reduced in thickness.

One aspect of the present invention includes a rotor provided in a freely rotatable manner and a stator, and the stator is formed by stacking steel plates, and has a yoke portion and a center of rotation of the rotor from the yoke portion. projecting the first side of the radial direction, a plurality of teeth which are arranged at predetermined intervals in a circumferential direction around the rotation shaft, a stator core comprising a first of the plurality of teeth A first coil provided in the tooth portion and a second coil in phase with the first coil provided on the first side in the radial direction from the first coil in the first tooth portion. And a third coil of a phase different from the first coil, provided in a second tooth portion of the plurality of tooth portions adjacent to the first tooth portion in the circumferential direction, In the second tooth portion, the third coil Ri provided in the first side in the radial direction, and the fourth coil of the third coil and the phase, and the first connecting line portion connected continuously to the first end of said first coil, said The second connection line portion continuously connected to the first end portion of the second coil, and the first connection portion housed in a slot portion formed between the first tooth portion and the second tooth portion. Between the first coil and the second coil of one tooth portion, and the third coil and the fourth coil of the second tooth portion housed in the slot portion, A first insulating portion that is provided in a stacking direction in which the steel plates are stacked in the stator core, and insulates the first coil and the second coil from the third coil and the fourth coil; wherein the first connecting line section, first in the stacking direction of the stator core On the end face side, the gap between the coil end portion of the first coil and the coil end portion of the third coil extends from the first radial side to the second radial side. A first radial line portion arranged in a state, and the second connection line portion is on the first end face side, and a coil end portion of the second coil and a coil end portion of the first coil The coil end portion of the fourth coil and the coil end portion of the third coil are arranged in a state extending from the first radial side to the second radial side. A second radial line portion, wherein the first insulating portion is formed by bending an end portion on the first end surface side toward the slot portion side in the stacking direction, and on the first end surface side. The coil end of the second coil, the coil end of the first coil, and the fourth coil. A coil end portion and a coil end portion of the third coil, and a covering portion disposed in a state extending from the first radial side to the second radial side, first radial line portion and the second radial line unit, the rotating machine that covered with the covering portion, it is.

According to this, it becomes possible to reduce the thickness of the conducting wire which forms a coil, and the coil of a compact coil end part can be formed. A conducting wire can be suitably wound. The first radial line portion that comes close to the third coil of the different phase and the second radial line portion close to the fourth coil and the third coil of the different phase It is possible to suitably insulate with the covering portion provided in the portion. The first radial line portion is disposed in a gap between the coil end portion of the first coil and the coil end portion of the third coil, and the second radial line portion is disposed in the second coil and the first coil. It is possible to arrange the coil end portions in the gaps between the coil end portions of the fourth coil and the third coil, and the increase in the dimension of the stator in the stacking direction can be suppressed. Since the covering portion is formed by bending an insulating material forming the first insulating portion, the covering portion can be easily provided on the first insulating portion. “Rotating machine” is a concept including a motor or a generator. The “first end portion” of each coil is one of a winding end portion and a winding start portion of each coil.

This rotating machine may be as follows. The covering portion includes a first wall portion and a second wall portion facing each other, and the first radial line portion passes through the second wall portion, and the first wall portion and the second wall portion A slit portion for disposing the first radial line portion is provided in a gap between the second wall portion, and the first radial line portion passes through the slit portion and is disposed in the gap. in, and covered by the cover portion may be so. According to this, the first radial line portion can be disposed in the gap through the slit portion.

The stator is provided in a third tooth portion of the plurality of tooth portions, and a fifth coil having the same phase as the first coil, and the third tooth portion, the fifth coil being A sixth coil having the same phase as the fifth coil, provided on the first side in the radial direction, wherein the first connection line portion includes a first end portion of the first coil and a front coil a second end of the serial fifth coil is a first pass line connecting the second connecting line section, a first end of the second coil, the second pre-Symbol sixth coil You may make it be the 2nd crossing which connects an edge part. According to this, in each of the 1st teeth part and the 3rd teeth part, the 2nd coil and the 6th coil connected by the 2nd connecting line part as the 2nd connecting line are used as the 1st connecting line. By providing the first coil and the fifth coil connected to each other by the first connecting wire portion on the first side in the radial direction, the first connecting wire portion (first connecting wire) and the second connecting wire portion (second (Crossover line) can be suitably arranged. The “second end portion” is the other of the winding end portion and the winding start portion with respect to the “first end portion” of each coil that is one of the winding end portion and the winding start portion of each coil.

The first end of the first coil, the first end of the second coil, the second end of the fifth coil, and the second end of the sixth coil are: provided on the side of the first end surface of the stator core before miracle layer direction, wherein the first connecting line section as a first pass line, on the side of the first end surface, a first end of the first coil And the second end of the fifth coil are connected to the second end of the fifth coil. The second end of the sixth coil may be connected. According to this, the 1st connecting line part as a 1st connecting line and the 2nd connecting line part as a 2nd connecting line can be arranged suitably. For example, two first connecting wire portions and second connecting wire portions (first connecting wire and second connecting wire) are arranged in the same manner as a conventional stator in which one coil is provided in one tooth portion. be able to.

The stator is on the side of the first end surface, said stator core, said a first connecting line section and the second connecting line section, the comprising a second insulating portion for insulating said second insulating portion of the previous SL A circumferential portion is formed along the yoke portion, and an installation portion in which the first connection line portion and the second connection line portion are arranged, and a first side in the radial direction from the installation portion, the laminated layer includes a projecting portion projecting in a direction, and the first connecting line section and the second connecting line section, along said protruding portion is bent in the circumferential direction, Ru disposed in the installation portion, way Also good. According to this, a 1st connection line part (1st connecting line) and a 2nd connecting line part (2nd connecting line) can be collectively bent by a projection part, and can be arrange | positioned in an installation part.

  The first end of the first coil is provided on the first side in the radial direction from the second end of the first coil, and the first end of the second coil is The second end of the coil is provided on the first side in the radial direction, and the second end of the fifth coil is provided on the second side in the radial direction from the first end of the fifth coil. The second end of the sixth coil may be provided on the second side in the radial direction from the first end of the sixth coil. According to this, each position of the 1st end part and the 2nd end part of the 1st coil in the 1st teeth part, and the 1st end part and the 2nd end part of the 5th coil in the 3rd teeth part These positions can be arranged corresponding to each other in the radial direction. Each position of the first end and the second end of the second coil in the first tooth portion, and each position of the first end and the second end of the sixth coil in the third tooth portion, A corresponding arrangement in the radial direction can be achieved.

Wherein the plurality of teeth is provided with a notch protrusion coil is provided is cut before miracle layer direction of projecting the stator in the radial direction from the yoke part, wherein the notch is in the stacking direction on the side of the second end face on the opposite side of the stator core to the side of the front SL side, and the first end surface of the first end surface, and are formed on both sides of the front distichum direction it may be so. According to this, it becomes possible to bend the conducting wire which forms each coil within a slot part. The height (dimension in the stacking direction) of the coil end portion of each coil can be reduced, and an increase in the dimension of the stator in the stacking direction can be suppressed . The “ stator coil” is a concept including the “first coil” and the “second coil” described above, and each of the stator coils including the “first coil” and the “second coil”. Correspond. The “stator coil” may include “third coil” and “fourth coil” and / or “fifth coil” and “sixth coil”.

  The stator may be formed of an insulating material having a constant thickness, and may include a third insulating portion that covers an outer periphery of the protruding portion and insulates the protruding portion and the coil. According to this, the insulation between the protruding portion and the coil can be ensured by the third insulating portion. Since the third insulating portion is formed of an insulating material having a constant thickness, the height of the coil end portion of each coil can be reduced, and an increase in the dimension of the stator in the stacking direction can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the rotary machine provided with the stator of the new structure which makes the height of a coil end part low and can be reduced in thickness can be obtained.

It is a top view which abbreviate | omits and shows an example of a rotary machine. It is a top view which shows an example of a stator core. It is a perspective view which shows an example of the assembly of a yoke part and a teeth part, and the assembled stator core segment. (A) is the end elevation which carried out the section of the projection part of the teeth part covered with the 3rd insulating part in the position of the GG line shown in FIG. (B) is a figure explaining the dimensional change in the lamination direction. It is an example of a connection diagram. An outline of the arrangement state of the first radial line portion and the second radial line portion and the covering state of the first radial line portion and the second radial line portion by the covering portion of the first insulating portion is shown in FIG. It is the end elevation cut in the position of the EE line shown. It is the end elevation which showed the outline of the arrangement state of the 2nd radial line part, and the covering state of the 2nd radial line part by the covering part of the 1st insulating part, and was cut in the position of the FF line shown in FIG. . It is a top view which shows an example of the state which provided the 2nd insulating part in the stator core. (A) is a perspective view which shows an example of a 2nd insulation part. (B) is the side view which looked at the state where the circumferential direction line | wire part of the crossing line was accommodated in the installation part, and was seen from the I direction of FIG. 9 (A). (C) is the top view seen from the H direction of FIG. 9 (A). (A) is a perspective view which shows an example of the 1st insulating part of the state which is not bent. (B) is the side view seen from the J direction of Drawing 10 (A). It is a top view corresponding to the state seen from the H direction shown in FIG.6 and FIG.7 which shows an example of the covering of the crossover by the coating | coated part of a 1st insulating part, and the bending of a coating | coated part.

  Embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be employed in the same technical idea. For example, some of the configurations shown below may be omitted or replaced with other configurations. Other configurations may be included.

<Rotating machine>
The rotating machine 10 is, for example, a motor or a generator. A rotating machine 10 such as a motor or a generator is mounted on various products. For example, the rotating machine 10 is mounted on an electric vehicle. Examples of the electric vehicle include an electric vehicle (including a hybrid vehicle), an electric bicycle, an electric wheelchair, an electric cart, and an electric trolley. When the rotating machine 10 is a motor, the rotating machine 10 is used as a power source for moving an electric vehicle, for example. As shown in FIG. 1, the rotating machine 10 includes a rotor 30 and a stator 40.

  The rotor 30 includes a rotor core 32, a plurality of permanent magnets 34, and a shaft 36. The rotor core 32 is formed, for example, by laminating electromagnetic steel sheets with a press. The rotor core 32 is formed with a space for storing a plurality of permanent magnets 34 and a through hole for fixing the shaft 36. Such spaces and through-holes extend in the direction in which the electromagnetic steel sheets are laminated. The permanent magnet 34 is provided inside the rotor core 32 in a state of being accommodated in the space described above. When the rotating machine 10 is a motor, a motor including such a rotor 30 is referred to as an IPM (Interior Permanent Magnet) motor. The number of poles of the rotor 30 is appropriately set in consideration of various conditions such as required performance.

  The shaft 36 is fixed to a through hole formed in the center portion of the rotor core 32. Bearings (not shown) are attached to the shaft 36 on both sides of the rotor core 32. The bearing is supported by a support portion (not shown) provided in the stator 40. The shaft 36 serves as a rotation axis, and the rotor 30 rotates about the shaft 36 as a rotation center. The rotor 30 is the same as the rotor provided in a motor or generator that has already been put into practical use. Therefore, the other description regarding the rotor 30 is omitted. In the present embodiment, the direction corresponding to the direction in which the rotor 30 rotates (referred to as “rotation direction”; see “arrow” shown in the vicinity of the shaft 36 in FIG. 1) is referred to as “circumferential direction”. The circumferential direction is a concept including both directions of the rotation direction and the opposite direction with the shaft 36 serving as a rotation axis as a center. In the rotating machine 10, the radial direction around the shaft 36 serving as the rotation axis is referred to as “radial direction”.

  The stator 40 includes a stator core 42, a plurality of proximal end side coils 51, a plurality of opposing side coils 52, and a third insulating portion 78 (not shown in FIG. 1, see FIGS. 4A, 6 and 7). The second insulating portion 80 and the first insulating portion 90 (not shown in FIG. 1, refer to FIGS. 6, 7, 10A, and 10B). As shown in FIG. 2, the stator core 42 includes a yoke portion 44 and a plurality of teeth portions 46. In the example shown in FIG. 2, the stator core 42 includes 18 tooth portions 46. The eighteen tooth portions 46 protrude from the yoke portion 44 toward the rotor 30 (shaft 36). The direction in which the tooth portion 46 protrudes coincides with the radial direction. As shown in FIG. 2, the stator core 42 is formed by arranging a plurality of stator core segments (hereinafter referred to as “segments”) 48 in an annular shape.

  As shown in FIGS. 2 and 3, the segment 48 includes a yoke portion 45 and a tooth portion 46. The yoke portion 45 is formed by laminating electromagnetic steel sheets into a shape as shown in FIGS. 2 and 3 by a press machine. The yoke portion 45 is formed with an engagement groove 455 on the radially inner side surface. A concave portion 451 is formed on one side of the yoke portion 45 in the circumferential direction. A convex portion 453 is formed on the other side of the yoke portion 45 in the circumferential direction.

  Similarly to the yoke portion 45, the teeth portion 46 is formed by laminating electromagnetic steel sheets by stamping into a shape as shown in FIGS. In the tooth portion 46, an engagement protrusion 461 having a shape corresponding to the engagement groove 455 is formed on the outer side surface in the radial direction. The engagement groove 455 and the engagement protrusion 461 extend in the stacking direction. The stacking direction is a direction in which the electromagnetic steel plates are stacked in the segment 48 (stator core 42). The direction in which the electromagnetic steel sheets are laminated by the rotor core 32 coincides with the lamination direction. In the segment 48 (stator core 42), the plate thickness and the number of laminated magnetic steel sheets are appropriately set in consideration of various conditions (the same applies to the rotor core 32). The yoke portion 45 and the teeth portion 46 are formed of the same electromagnetic steel plate, and the plate thickness and the number of stacked layers are the same.

  The teeth portion 46 includes a projecting portion 463 and a facing portion 467, which are integrally formed. The protruding portion 463 forms a protruding portion in the tooth portion 46 provided in a state where the radial direction protrudes from the yoke portion 44 toward the rotor 30. The protruding portion 463 includes four cutout portions 465. The notches 465 are formed on both sides in the circumferential direction of the protrusions 463 on both sides in the stacking direction (see FIGS. 3 and 4A). The notch 465 is formed in a state where the above-described part is notched in the stacking direction. In the protruding portion 463 in which the notch portion 465 is formed, the proximal end side coil 51 and the opposing side coil 52 are provided. The facing portion 467 is integrated with the protruding portion 463 and includes a surface facing the rotor 30.

  In the present embodiment, one side in the stacking direction which is the side of the first end surface 421 (see FIGS. 1, 6, and 7) of the stator core 42 is referred to as a “first end surface side”, and the second end surface 422 ( The other side in the stacking direction that is the side of FIGS. 6 and 7 is referred to as a “second end face side”. The second end surface 422 is an end surface of the stator core 42 that is opposite to the first end surface 421 in the stacking direction. The first end surface 421 of the stator core 42 is formed by an end surface on one side of the segment 48 (the yoke portion 45 and the tooth portion 46) in the stacking direction. The second end surface 422 of the stator core 42 is formed by the other end surface of the segment 48 (the yoke portion 45 and the tooth portion 46) in the stacking direction.

  The segment 48 is formed integrally by assembling the yoke portion 45 and the tooth portion 46 which are separate from each other. Specifically, the segment 48 is formed by fitting the engagement protrusion 461 into the engagement groove 455 (see the upper part of FIG. 3). In a state where the engagement protrusion 461 is fitted in the engagement groove 455 (see the lower stage in FIG. 3), the movement of the yoke portion 45 and the tooth portion 46 to be separated in the radial direction is restricted. The shapes of the engagement grooves 455 and the engagement protrusions 461 are, for example, trapezoidal shapes as shown in the upper part of FIG. However, the shape of the engagement groove 455 and the engagement protrusion 461 may be a shape that can restrict the movement in the radial direction as described above, and may be a shape different from the trapezoid shape. You may make it be the press-fit state.

  As shown in FIG. 2, the stator core 42 is formed in an annular shape by fitting the convex portions 453 into the concave portions 451 formed in the yoke portions 45 of the adjacent segments 48. In the present embodiment, the stator core 42 is formed by arranging 18 segments 48 in an annular shape (see FIG. 2). Since the number of the tooth portions 46 in one segment 48 is one, 18 slot portions 47 are formed in the stator core 42. The slot portion 47 is a space formed between adjacent tooth portions 46. The number of slots of the stator 40 is appropriately set in consideration of various conditions such as required performance. A technique for forming the stator core 42 by the plurality of divided segments 48 is a known technique, and a known technique can also be adopted in this embodiment. Other description regarding this point is omitted.

  The proximal side coil 51 and the opposing side coil 52 are formed by concentrating a conductive wire around the protruding portion 463 of the tooth portion 46. The proximal end coil 51 and the opposing coil 52 are provided side by side in the radial direction with respect to one tooth portion 46. The opposing coil 52 is provided on the inner side in the radial direction than the proximal coil 51. When forming the proximal end side coil 51 and the opposing side coil 52, the protruding portion 463 is covered with the third insulating portion 78 as shown in FIG. The third insulating portion 78 is formed, for example, by winding an insulating sheet having a certain thickness around the outer periphery of the protruding portion 463 and then fixing the ends of the insulating sheet by a predetermined method. The annular insulating sheet wound around the protrusion 463 is deformed in a range corresponding to the four notches 465, and is in a state as shown in FIG. According to the third insulating portion 78, it is possible to ensure insulation between the protruding portion 463, the proximal end side coil 51, and the opposing side coil 52.

  The base end side coil 51 and the counter side coil 52 are appropriately formed by adopting a known winding technique in the same manner as a coil provided in a stator of a rotating machine that has already been put into practical use. For example, a conducting wire is wound by a predetermined winding machine, and the proximal end side coil 51 and the opposing side coil 52 are formed. You may make it form the base end side coil 51 and the opposing side coil 52 by the method using the coil bobbin already practically used. Regarding the base end side coil 51 and the counter side coil 52 provided in the same tooth portion 46, the winding end portion (hereinafter referred to as “end portion”) 53 and the winding start portion (hereinafter referred to as “start portion”) of the base end side coil 51. ) 55 and the end portion 54 and the start portion 56 of the opposing coil 52 are provided in the order of the end portion 54, the start portion 56, the end portion 53, and the start portion 55 in the radial direction from the inside to the outside. (See FIG. 1). Other description regarding the formation of the base end side coil 51 and the counter side coil 52 is omitted.

  The plurality of proximal-side coils 51 are classified into any one of the U-phase, V-phase, and W-phase proximal coils 51, and are star-connected, for example, as shown in FIG. The plurality of opposed coils 52 are classified into any one of the U-phase, V-phase, and W-phase opposed coils 52, and, for example, are star-connected in the same manner as the opposed coils 52 (see FIG. 5).

  Among the 18 base end side coils 51, six predetermined base end side coils 51U (indicated as “U11, U12, U13, U14, U15, U16” in FIG. 5). In the case of distinction, “base end side coil U11” to “base end side coil U16” are connected by a first connecting wire 61U as a connecting wire portion to form a continuous U-phase base end side connecting coil 67U. To do. Specifically, the first connecting wire 61U includes the end portion 53U of the base end side coil U11 and the start portion 55U of the base end side coil U12, and the end portion 53U of the base end side coil U12 and the start portion of the base end side coil U13. 55U, the end portion 53U of the base end side coil U13 and the start portion 55U of the base end side coil U14, the end portion 53U of the base end side coil U14 and the start portion 55U of the base end side coil U15, and the base end side coil U15 Are connected to the end portion 53U of the base end side and the start portion 55U of the base end side coil U16. In FIG. 5, the reference numeral “53U” indicating the end portion 53U is attached to the base end side coils U11, U12, the start portion 55U is attached to the base end side coils U12, U16, and the end portions of the other base end side coils 51U. The reference numerals “53U” and “55U” are omitted for 53U and the start portion 55U (the same applies to the base end side coils 51V and 51W described later).

  Among the 18 base end side coils 51, the other six base end side coils 51V (indicated as “V11, V12, V13, V14, V15, V16” in FIG. 5). In the case of distinction, “base end side coil V11” to “base end side coil V16” are connected by a first connecting wire 61V as a connecting wire portion to form a continuous V-phase base end side connecting coil 67V. To do. Specifically, the first connecting wire 61V includes the end portion 53V of the base end side coil V11 and the start portion 55V of the base end side coil V12, and the end portion 53V of the base end side coil V12 and the start portion of the base end side coil V13. 55V, end portion 53V of the base end side coil V13 and start portion 55V of the base end side coil V14, end portion 53V of the base end side coil V14 and start portion 55V of the base end side coil V15, and base end side coil V15 Are connected to the end portion 53V of the base end and the start portion 55V of the base end side coil V16.

  Among the 18 base end side coils 51, yet another six base end side coils 51W (in FIG. 5, described as “W11, W12, W13, W14, W15, W16”. Hereinafter, the base end side coil 51W is referred to as “W11, W12, W13, W14, W15, W16”. When distinguishing from each other, the “base end side coil W11” to “base end side coil W16” are connected by the first connecting wire 61W as the connecting wire portion, and the continuous W phase base end side connecting coil 67W is connected. Form. Specifically, the first connecting wire 61W includes the end portion 53W of the base end side coil W11 and the start portion 55W of the base end side coil W12, and the end portion 53W of the base end side coil W12 and the start portion of the base end side coil W13. 55W, end portion 53W of the base end side coil W13 and start portion 55W of the base end side coil W14, end portion 53W of the base end side coil W14 and start portion 55W of the base end side coil W15, and base end side coil W15 The end portion 53W of the base end and the start portion 55W of the base end side coil W16 are connected to each other.

  Among the 18 opposing coils 52, predetermined six opposing coils 52U (indicated as “U21, U22, U23, U24, U25, U26” in FIG. 5) Hereinafter, when distinguishing the opposing coils 52U, The "opposite side coil U21" to "opposite side coil U26" are connected by a second connecting wire 62U as a connection line portion, and form a continuous U-phase opposing side coupling coil 68U. Specifically, the second connecting wire 62U is opposed to the end portion 54U of the opposing side coil U21 and the starting portion 56U of the opposing side coil U22, the end portion 54U of the opposing side coil U22, and the starting portion 56U of the opposing side coil U23. End portion 54U of side coil U23 and start portion 56U of counter side coil U24, end portion 54U of counter side coil U24 and start portion 56U of counter side coil U25, end portion 54U of counter side coil U25 and counter side coil U26 Are connected to each other. In FIG. 5, the reference numeral “54U” indicating the end portion 54U is attached to the opposing coils U21 and U22, the start portion 56U is attached to the opposing coils U22 and U26, and the end portions 54U and the start portions of the other opposing coils 52U. For the portion 56U, the reference numerals “54U” and “56U” are omitted (the same applies to the opposing coils 52V and 52W described later).

  Among the 18 opposing coils 52, the other six opposing coils 52V (referred to as "V21, V22, V23, V24, V25, V26" in FIG. 5). The "opposite side coil V21" to "opposite side coil V26" are connected by a second connecting wire 62V as a connection line portion to form a continuous V phase opposing side coupling coil 68V. Specifically, the second connecting line 62V is opposed to the end portion 54V of the opposed coil V21 and the start portion 56V of the opposed side coil V22, the end portion 54V of the opposed side coil V22, and the start portion 56V of the opposed side coil V23. The end portion 54V of the side coil V23 and the start portion 56V of the counter side coil V24, the end portion 54V of the counter side coil V24 and the start portion 56V of the counter side coil V25, the end portion 54V of the counter side coil V25 and the counter side coil V26. Are connected to each other.

  Among the 18 opposing coils 52, another 6 opposing coils 52W (indicated as “W21, W22, W23, W24, W25, W26” in FIG. 5) Hereinafter, the opposing coils 52W are distinguished from each other. , “Opposed-side coil W21” to “opposed-side coil W26”) are connected by a second connecting wire 62W as a connecting line portion to form a continuous W-phase opposed-side coupling coil 68W. Specifically, the second connecting wire 62W is opposed to the end portion 54W of the opposing side coil W21 and the starting portion 56W of the opposing side coil W22, and the end portion 54W of the opposing side coil W22 and the starting portion 56W of the opposing side coil W23. End portion 54W of side coil W23 and start portion 56W of counter side coil W24, end portion 54W of counter side coil W24 and start portion 56W of counter side coil W25, end portion 54W of counter side coil W25 and counter side coil W26 Are connected to each other.

  The start portion 55U of the base end side coil U11 and the start portion 56U of the facing side coil U21 are connected to a common terminal 69U. The start portion 55U of the base end side coil U11 is connected to the terminal 69U via the first lead wire 70U, and the start portion 56U of the facing side coil U21 is connected to the terminal 69U via the second lead wire 72U. The first lead wire 70U is a connecting wire portion that is continuously connected to the start portion 55U of the proximal end side coil U11. The second lead wire 72U is a connection line portion that is continuously connected to the start portion 56U of the opposed coil U21. The start portion 55V of the base end side coil V11 and the start portion 56V of the facing side coil V21 are connected to a common terminal 69V. The start portion 55V of the base end side coil V11 is connected to the terminal 69V via the first lead wire 70V, and the start portion 56V of the counter side coil V21 is connected to the terminal 69V via the second lead wire 72V. The first lead wire 70V is a connection line portion that is continuously connected to the start portion 55V of the proximal end side coil V11. The second lead wire 72V is a connection line portion that is continuously connected to the start portion 56V of the opposed coil V21. The start portion 55W of the base end side coil W11 and the start portion 56W of the facing side coil W21 are connected to a common terminal 69W. The start portion 55W of the base end side coil W11 is connected to the terminal 69W via the first lead wire 70W, and the start portion 56W of the opposing side coil W21 is connected to the terminal 69W via the second lead wire 72W. The first lead wire 70W is a connection line portion that is continuously connected to the start portion 55W of the proximal end side coil W11. The second lead wire 72W is a connection line portion that is continuously connected to the start portion 56W of the opposing coil W21.

  The end portion 53U of the base end side coil U16, the end portion 53V of the base end side coil V16, and the end portion 53W of the base end side coil W16 are connected to each other at a neutral point (the base end side connecting coil 67U in FIG. 5). , 67V, 67W are formed at the center (see “black circle”). The end 54U of the opposing coil U26, the end 54V of the opposing coil V26, and the end 54W of the opposing coil W26 are connected to each other at a neutral point (in FIG. 5, the opposing coupling coils 68U, 68V, 68W). Are formed at the center where the two intersect. Formation of the neutral point in the base end side connection coils 67U, 67V, 67W is performed via the first lead wires 71U, 71V, 71W. The first lead wire 71U is a connection line portion that is continuously connected to the end portion 53U of the proximal end side coil U16. The first lead wire 71V is a connecting wire portion that is continuously connected to the end portion 53V of the base end side coil V16. The first lead wire 71W is a connecting wire portion that is continuously connected to the end portion 53W of the proximal end side coil W16. Formation of the neutral point in the opposing connection coils 68U, 68V, 68W is performed via the second lead lines 73U, 73V, 73W. The second lead wire 73U is a connection line portion that is continuously connected to the end portion 54U of the opposed coil U26. The second lead wire 73V is a connection line portion that is continuously connected to the end portion 54V of the opposed coil V26. The second lead wire 73W is a connecting wire portion that is continuously connected to the end portion 54W of the opposing coil W26.

  The first lead wires 70U and 71U form a U-phase first connection line portion together with the first connecting wire 61U, and the second lead wires 72U and 73U and the second lead wire 62U form a U-phase second connection line portion. Form. The first lead wires 70V and 71V form a V-phase first connection line portion together with the first feeder wire 61V, and the second lead wires 72V and 73V together with the second feeder wire 62V are a V-phase second connection line portion. Form. The first lead wires 70W and 71W form a W-phase first connection line portion together with the first feeder wire 61W, and the second lead wires 72W and 73W together with the second feeder wire 62W and a second connection line portion W-phase. Form.

  The first connecting wire 61U includes a first radial line portion 63U and a first circumferential line portion 65U (see FIGS. 1 and 9B). The first radial line portion 63U and the first circumferential line portion 65U form a first connecting wire 61U in a continuously connected state. The first connecting wire 61V includes a first radial line portion 63V and a first circumferential line portion 65V (see FIGS. 1 and 9B). The first radial line portion 63V and the first circumferential line portion 65V form a first connecting wire 61V in a state where they are continuously connected. The first connecting wire 61W includes a first radial line portion 63W and a first circumferential line portion 65W (see FIGS. 1 and 9B). The first radial line portion 63W and the first circumferential line portion 65W form a first connecting wire 61W in a continuously connected state. Connection of the two proximal end coils 51U by the first connecting wire 61U, connection of the two proximal end coils 51V by the first connecting wire 61V, and two proximal end coils 51W by the first connecting wire 61W The connection is performed in the same manner.

  The second connecting wire 62U includes a second radial direction line portion 64U and a second circumferential direction line portion 66U (see FIGS. 1 and 9B). The second radial line portion 64U and the second circumferential line portion 66U form a second connecting wire 62U in a state where they are continuously connected. The second connecting wire 62V includes a second radial line portion 64V and a second circumferential line portion 66V (see FIGS. 1 and 9B). The second radial line portion 64V and the second circumferential line portion 66V form a second connecting wire 62V in a continuously connected state. The second connecting wire 62W includes a second radial direction line portion 64W and a second circumferential direction line portion 66W (see FIGS. 1 and 9B). The second radial line portion 64W and the second circumferential line portion 66W form a second connecting wire 62W in a state where they are continuously connected. The connection of the two opposing coils 52U by the second connecting wire 62U, the connection of the two opposing coils 52V by the second connecting wire 62V, and the connection of the two opposing coils 52W by the second connecting wire 62W are as follows: Done in the same way. The first connecting line 61U and the second connecting line 62U, the first connecting line 61V and the second connecting line 62V, the first connecting line 61W and the second connecting line 62W are gathered on the first end surface side in the stacking direction. It is arranged with.

  In the present embodiment, the base end side coils 51U, 51V, 51W are not distinguished or are collectively referred to as “base end side coil 51”. When the opposed coils 52U, 52V, 52W are not distinguished from each other or are collectively referred to as “opposed coils 52”. When the end parts 53U, 53V, 53W are not distinguished or are collectively referred to as “end part 53”, the end parts 54U, 54V, 54W are not distinguished or are collectively referred to as “end part”. Part 54 ". When the start portions 55U, 55V, and 55W are not distinguished or collectively referred to as “start portion 55”, the start portions 56U, 56V, and 56W are not distinguished or are collectively referred to as “start”. Part 56 ". When the first connecting lines 61U, 61V, 61W are not distinguished or are collectively referred to as “first connecting line 61”, the second connecting lines 62U, 62V, 62W are not distinguished, or these are Collectively, it is referred to as “second crossover line 62”. When the first radial line portions 63U, 63V, and 63W are not distinguished or collectively referred to as “first radial line portions 63”, the second radial line portions 64U, 64V, and 64W are distinguished. When these are collectively referred to, they are referred to as “second radial direction line portion 64”. When the first circumferential line portions 65U, 65V, and 65W are not distinguished or collectively referred to as “first circumferential line portions 65”, the second circumferential line portions 66U, 66V, and 66W are distinguished. When these are collectively referred to, they are referred to as “second circumferential direction line portion 66”.

  The first radial line portion 63 that forms the first connecting wire 61 of each phase is continuously connected to the end portion 53 of the proximal end side coil 51 and is arranged from the radial inner side toward the radial outer side. . The second radial line portion 64 that forms the second connecting wire 62 of each phase is continuously connected to the end portion 54 of the opposed coil 52 and is arranged from the radially inner side toward the radially outer side. The first radial direction line portion 63 is provided between the coil end portion 57 of one base end side coil 51 and the coil end portion 57 of the other base end side coil 51 provided in each adjacent tooth portion 46. . The second radial direction line portion 64 is provided in each adjacent tooth portion 46, and the coil end portions 57 and 58 of one base end side coil 51 and the counter side coil 52 and the other base end side coil 51 and the counter portion. Provided between the coil end portions 57 and 58 of the side coil 52.

  Based on the range of “D” shown in FIG. 1, the first radial line portion 63U has a coil end portion 57U of the base end side coil 51U and a coil end of the base end side coil 51V on the first end face side in the stacking direction. Between the portions 57V (see FIG. 6), they are arranged from the radially inner side to the radially outer side. In the range of “D” shown in FIG. 1, the second radial line portion 64U is in the radial inner side range from the base end side coils 51U and 51V, and the second radial line portion 64U is on the first end surface side in the stacking direction. The coil end portion 58U and the coil end portion 58V of the opposed coil 52V (see FIG. 7) are arranged from the radially inner side to the radially outer side. Further, the second radial line portion 64U is continuous with the first radial line portion 63U and the coil end portion 57U of the proximal end side coil 51U and the coil end of the proximal end side coil 51V on the first end surface side in the stacking direction. Between the portions 57V (see FIG. 6), they are arranged from the radially inner side to the radially outer side. In the example illustrated in FIG. 6, the first radial line portion 63U and the second radial line portion 64U are arranged in a state of overlapping in the stacking direction. The first radial line portion 63U and the second radial line portion 64U may be overlapped in the circumferential direction (the same applies to the first radial line portion 63 and the second radial line portion 64 of different phases). ). In the range of “D” shown in FIG. 1, the base end side coil 51U and the counter side coil 52U, and the base end side coil 51V and the counter side coil 52V are stored in the same slot portion 47 (two sets of coils). It is.

  The first radial line portion 63V has a radial direction from the inside in the radial direction between the coil end portion 57V of the proximal end side coil 51V and the coil end portion 57W of the proximal end side coil 51W on the first end surface side in the stacking direction. It is arranged toward the outside. The second radial line portion 64V has a coil end portion 58V of the opposing side coil 52V and a coil of the opposing side coil 52W on the first end surface side in the stacking direction within a range radially inward of the proximal end coils 51V and 51W. Between the end parts 58W, it arrange | positions toward the outer side of radial direction from the inner side of radial direction. Further, the second radial line portion 64V is continuous with the first radial line portion 63V and the coil end portion 57V of the proximal end side coil 51V and the coil end of the proximal end side coil 51W on the first end surface side in the stacking direction. The portion 57 </ b> W is disposed from the inner side in the radial direction toward the outer side in the radial direction. The first radial line portion 63W has a radial direction from the inside in the radial direction between the coil end portion 57W of the proximal end side coil 51W and the coil end portion 57U of the proximal end side coil 51U on the first end surface side in the stacking direction. It is arranged toward the outside. The second radial line portion 64W has a coil end portion 58W of the opposing side coil 52W and a coil of the opposing side coil 52U on the first end surface side in the stacking direction within a range radially inward from the base end side coils 51W and 51U. Between the end parts 58U, it arrange | positions toward the outer side of radial direction from the inner side of radial direction. Further, the second radial line portion 64W is continuous with the first radial line portion 63W and the coil end portion 57W of the proximal end side coil 51W and the coil end of the proximal end side coil 51U on the first end surface side in the stacking direction. The portion 57U is disposed from the inner side in the radial direction toward the outer side in the radial direction.

  In the present embodiment, the coil end portions 57U, 57V, 57W are not distinguished, or collectively referred to as “coil end portion 57”, the coil end portions 58U, 58V, 58W are not distinguished, or These are collectively referred to as “coil end portion 58”.

  The first circumferential line portion 65 that forms the first connecting wire 61 of each phase is disposed in the circumferential direction along the yoke portion 44. The first circumferential line portion 65 is a portion opposite to the first radial line portion 63 and is continuously connected to the start portion 55 of the in-phase proximal coil 51. The second circumferential line portion 66 that forms the second connecting wire 62 of each phase is disposed in the circumferential direction along the yoke portion 44. The second circumferential line portion 66 is a portion opposite to the second radial line portion 64 and is continuously connected to the start portion 56 of the opposite-side coil 52 in the same phase. The first circumferential line portion 65 and the second circumferential line portion 66 of the same phase are arranged so as to overlap in the stacking direction and / or radial direction (in FIGS. 1 and 9B, they overlap in the stacking direction). State)).

  As shown in FIGS. 1 and 8, the second insulating portion 80 is provided on the first end surface 421 of the stator core 42 so as to correspond to the yoke portion 44. The second insulating portion 80 insulates the stator core 42 from the first connecting wire 61 and the second connecting wire 62. The second insulating portion 80 is formed by arranging a plurality of insulating modules 82 in an annular shape. As shown in FIG. 2, in this embodiment in which the stator core 42 is formed by 18 segments 48, the second insulating portion 80 is formed by arranging 18 insulating modules 82 in an annular shape. The insulating module 82 is integrally formed by resin molding, for example. As shown in FIGS. 9A to 9C, the insulation module 82 includes installation portions 84U, 84V, 84W and a protrusion 86. In the present embodiment, the installation portions 84U, 84V, and 84W are not distinguished or are collectively referred to as “installation portion 84”.

  The installation portions 84U, 84V, and 84W are groove portions that have an arc shape along the yoke portion 45 in the circumferential direction and are concave in the stacking direction (the second end face side is the bottom side). The installation parts 84U, 84V, 84W are arranged in the order of the installation part 84U, the installation part 84V, and the installation part 84W with the radial direction directed from the inside to the outside. The installation portion 84U accommodates a first circumferential line portion 65U and a second circumferential line portion 66U. For example, as shown in FIG. 9B, the first circumferential line portion 65U and the second circumferential line portion 66U are arranged such that the first circumferential line portion 65U is on the second end face side in the stacking direction. The portion 66U is stored in the installation portion 84U in a state of being overlapped so as to be on the first end surface side.

  The installation portion 84V accommodates a first circumferential line portion 65V and a second circumferential line portion 66V. For example, as shown in FIG. 9B, the first circumferential line portion 65V and the second circumferential line portion 66V are arranged such that the first circumferential line portion 65V is the second circumferential line on the second end face side in the stacking direction. The portion 66V is stored in the installation portion 84V in a state of being overlapped so as to be on the first end face side. The installation portion 84W accommodates a first circumferential line portion 65W and a second circumferential line portion 66W. For example, as shown in FIG. 9B, the first circumferential line portion 65W and the second circumferential line portion 66W are arranged such that the first circumferential line portion 65W is on the second end face side in the stacking direction. The portion 66W is stored in the installation portion 84W in a state of being overlapped so as to be on the first end surface side. In the state accommodated in the installation parts 84U, 84V, 84W, the first circumferential line part 65U and the second circumferential line part 66U, the first circumferential line part 65V and the second circumferential line part 66V, and the first Contact between the circumferential line portion 65W and the second circumferential line portion 66W is prevented (see FIG. 9B). Therefore, it is possible to ensure insulation between the first circumferential line portions 65 and the second circumferential line portions 66 of different phases.

  Claw portions 87 are formed at predetermined intervals in the circumferential direction at the opening side end portions (first end surface side in the stacking direction) of the installation portions 84U, 84V, 84W having a concave shape. The claw part 87 provided in the installation part 84U is hooked on the second circumferential direction line part 66U arranged on the first end face side in the stacking direction or presses the second circumferential direction line part 66U. The claw portion 87 prevents the first circumferential direction line portion 65U and the second circumferential direction line portion 66U from coming off from the installation portion 84U. The nail | claw part 87 provided in the installation part 84V is hooked on the 2nd circumferential line part 66V arrange | positioned at the 1st end surface side of the lamination direction, or presses the 2nd circumferential line part 66V. The claw portion 87 prevents the first circumferential direction line portion 65V and the second circumferential direction line portion 66V from coming off from the installation portion 84V. The claw part 87 provided in the installation part 84W is hooked on the 2nd circumferential line part 66W arrange | positioned at the 1st end surface side of the lamination direction, or presses the 2nd circumferential line part 66W. The claw portion 87 prevents the first circumferential direction line portion 65W and the second circumferential direction line portion 66W from coming off from the installation portion 84W.

  The insulating module 82 has a planar shape viewed from the H direction (see FIG. 9A) corresponding to the shape on the first end surface side in the stacking direction of the yoke portion 45 (FIGS. 3, 8, and FIG. 9 (A), (C)). The insulating module 82 is formed with a concave portion 88 and a convex portion 89. The concave portion 88 and the convex portion 89 have shapes corresponding to the concave portion 451 and the convex portion 453 in the yoke portion 45. The recess 88 is formed on one side in the circumferential direction of the insulating module 82 corresponding to the recess 451 in the yoke portion 45. The convex portion 89 is formed on the other side in the circumferential direction of the insulating module 82 corresponding to the convex portion 453 in the yoke portion 45.

  The insulation module 82 is attached to the segment 48. As in the case of the stator core 42 formed by the segments 48, the second insulating portion 80 is formed in an annular shape by fitting the convex portions 89 into the concave portions 88 formed in the insulating modules 82 attached to the adjacent segments 48 ( (See FIG. 8). By matching the arrangement of the concave portion 451 and the convex portion 453 in the yoke portion 45 with the arrangement of the concave portion 88 and the convex portion 89 in the insulating module 82, the fitting of the convex portion 453 into the concave portion 451 and the convex portion into the concave portion 88 are performed. 89 can be fitted at the same timing. Therefore, even if the insulation module 82 is attached, the segment 48 and the insulation module 82 can be smoothly formed into an annular shape. In the second insulating portion 80, the installation portions 84U provided in each of the annularly arranged insulating modules 82 are continuously in the circumferential direction as shown in FIG. Similarly, the installation part 84V is in a state that is continuous in the circumferential direction outside the installation part 84U, and the installation part 84W is in a state that is continuous in the circumferential direction outside the installation part 84V.

  The protruding portion 86 is provided on the inner side in the radial direction from the installation portion 84U, and protrudes in the stacking direction toward the first end surface. The protrusion 86 serves as a fulcrum for bending the first connecting wire 61 and the second connecting wire 62 from the radial direction to the circumferential direction. For example, based on the range of “D” shown in FIG. 1, the first crossing line 61U and the second crossing line 62U are located at a portion serving as a fulcrum of the protrusion 86 (see “P2” shown in FIG. 9A). It touches, bends in the circumferential direction, and is stored in the installation portion 84U. The projecting portion 86 where the first connecting wire 61U and the second connecting wire 62U are in contact with the tooth portion 46 provided with the base end side coil 51U and the opposed side coil 52U forms another slot portion 47 ( This is a protrusion 86 of an insulating module 82 attached to a segment 48 including a base end side coil 51V and a counter side coil 52V (see FIG. 1).

  That is, the first connecting wire 61 and the second connecting wire 62 are bent in contact with the fulcrum portion “P2” of the protrusion 86 of the insulating module 82 attached to the segment 48 adjacent in the rotation direction. In the present embodiment, the first radial line portion 63 is a portion of the first connecting wire 61 between the end portion 53 of the proximal end side coil 51 and the fulcrum portion “P2” of the protruding portion 86. The first circumferential line portion 65 is a first portion between the fulcrum portion “P2” of the protrusion 86 and the start portion 55 of the in-phase proximal end coil 51 provided in the tooth portion 46 that is separated by two slots in the rotational direction. This is the part of the connecting line 61. The second radial line portion 64 is a portion of the second connecting wire 62 between the end portion 54 of the opposing coil 52 and the fulcrum portion “P2” of the protrusion 86. The second circumferential line portion 66 is a second portion between the fulcrum portion “P2” of the protrusion 86 and the start portion 56 of the opposite-side coil 52 in phase provided in the tooth portion 46 that is separated by two slots in the rotational direction. This is a part of the crossover line 62.

  The first connecting wire 61U of the base end side coil 51U and the second connecting wire 62U of the opposing side coil 52U are disposed in the vicinity of a predetermined portion of the protrusion 86 (see “P3” shown in FIG. 9A). Leave from 84U. The portion where the first connecting wire 61U (first circumferential line portion 65U) and the start portion 55U of the proximal end side coil 51U are continuous is deformed along the “P3” portion of the protrusion 86. The portion where the second connecting wire 62U (second circumferential line portion 66U) and the start portion 56U of the opposing coil 52U are continuous is deformed along the “P3” portion of the protrusion 86. The start portions 55V and 56V of the base end side coil 51V and the counter side coil 52V detached from the installation portion 84V are deformed in contact with the predetermined portion “P3” of the protrusion 86. The start portions 55W and 56W of the base end side coil 51W and the counter side coil 52W detached from the installation portion 84W are deformed in contact with a predetermined portion “P3” of the protrusion 86.

  In the state shown in FIG. 1, the first circumferential line portion 65U of the proximal end side coil 51U and the second circumferential direction line portion 66U of the opposing side coil 52U are on the side of the start portions 55U and 56U, and the proximal end side coil 51W It intersects the first connecting wire 61W (first circumferential line portion 65W) and the second connecting wire 62W (second circumferential line portion 66W) of the opposing coil 52W. The start portions 55V and 56V of the base end side coil 51V and the counter side coil 52V are respectively connected to the first connecting wire 61U (first circumferential direction line portion 65U) of the base end side coil 51U and the second connecting wire 62U of the counter side coil 52U. Intersects with (second circumferential line portion 66U). The start portions 55W and 56W of the base end side coil 51W and the counter side coil 52W are respectively connected to the first connecting wire 61V (first circumferential line portion 65V) of the base end side coil 51V and the second connecting wire 62V of the counter side coil 52V. Intersects (second circumferential line portion 66V).

  Two sets of proximal-side coils 51 and opposed-side coils 52 provided in each of the teeth portions 46 adjacent in the circumferential direction and housed in a slot portion 47 formed between the two teeth portions 46 are: It is insulated by the first insulating part 90. The first insulating part 90 is formed of, for example, a sheet-like insulating material. As shown in FIGS. 6, 7, and 10 </ b> A and 10 </ b> B, the first insulating portion 90 includes a covering portion 92. The first insulating portion 90 is configured so that the covering portion 92 is on the first end surface side in the stacking direction between the two sets of the proximal end coil 51 and the opposing side coil 52 in the slot portion 47 by the adjacent tooth portions 46. And arranged in the stacking direction. As shown in FIGS. 6, 7, and 10 (A), the covering portion 92 has a shape in which the end on the first end surface side in the stacking direction is bent toward the slot portion 47 (the second end surface side in the stacking direction). Have The covering portion 92 is formed, for example, by folding a sheet-like insulating material.

  The covering portion 92 includes a radial region 93 and a circumferential region 94. In a state where the first insulating portion 90 (the portion of the first insulating portion 90 excluding the covering portion 92) is disposed between the proximal side coil 51 and the opposing side coil 52 provided in each tooth portion 46, the covering portion 92. As shown in FIG. 11, the first connecting wire 61 (first radial line portion 63 and first circumferential line portion 65) and the second connecting wire 62 (second radial line portion 64 and second circumferential direction). Bending from the radial direction to the circumferential direction along the line portion 66). This bending is also performed with the projection 86 as a fulcrum (see “P2” shown in FIG. 9A) as in the case of the first crossing 61 and the second crossing 62. The radial region 93 of the covering portion 92 is a base end side in a state where the first insulating portion 90 is disposed between the proximal end side coil 51 and the opposing side coil 52 provided in the adjacent tooth portions 46. Between the coil end portions 57 and 58 of the coil 51 and the opposing side coil 52 and the coil end portions 57 and 58 of the other proximal side coil 51 and the opposing side coil 52, from the radially inner side to the radially outer side. Placed in. The circumferential region 94 of the covering portion 92 is arranged in the circumferential direction in the state described above. The circumferential region 94 may be accommodated in the installation portion 84 corresponding to each phase together with the first circumferential line portion 65 and the second circumferential line portion 66. In this case, a suitable insulating state can be maintained.

  The covering portion 92 includes a first wall portion 95 and a second wall portion 96 as shown in FIGS. 6, 7, and 10 (A). In the covering portion 92, the first wall portion 95 and the second wall portion 96 face each other. A gap 98 is formed between the first wall portion 95 and the second wall portion 96. In the gap 98, a first radial line portion 63 and a second radial line portion 64, and a part of each of the first circumferential line portion 65 and the second circumferential line portion 66 are arranged. In the radial region 93 of the covering portion 92, a slit portion 99 is provided at a predetermined position of the second wall portion 96 as shown in FIG. The slit 99 is formed by cutting the second wall 96 in the stacking direction. The first radial line portion 63 is disposed in the gap 98 through the slit portion 99. The radial region 93 of the covering portion 92 covers the first radial line portion 63 and the second radial line portion 64 from the circumferential direction between the coil end portions 57 of the two base end side coils 51, Between the coil end portions 58 of the two opposing coils 52, the second radial line portion 64 is covered from the circumferential direction (see FIG. 11). The circumferential region 94 of the covering portion 92 covers each part of the first circumferential direction line portion 65 and the second circumferential direction line portion 66 from the radial direction (see FIG. 11).

  In FIG. 11, the end portion 53 of the proximal end side coil 51, the end portion 54 of the opposing side coil 52, the first connecting wire 61 (first radial direction wire portion 63), and the second connecting wire 62 (second diameter). The direction line portion 64 and a part of the second circumferential direction line portion 66, the covering portion 92, and the protruding portion 86 of the second insulating portion 80 are illustrated, and other configurations (for example, the proximal end coil 51 (stacking direction) The coil end portion 57 on the first end surface side, the opposing coil 52 (the coil end portion 58 on the first end surface side in the stacking direction), and the second insulating portion 80 excluding the protrusions 86 are omitted. The first circumferential line portion 65 is not shown in FIG. 11 because it is disposed closer to the second end face side in the stacking direction than the second circumferential line portion 66.

  Based on the range of “D” shown in FIG. 1, the first insulating portion 90 includes, as shown in FIGS. 6 and 7, the base end side coil 51 </ b> U and the counter side coil 52 </ b> U, the base end side coil 51 </ b> V, and the counter side coil. It is arranged between 52V. The first insulating portion 90 insulates the base end side coil 51U and the counter side coil 52U from the base end side coil 51V and the counter side coil 52V in the slot portion 47. The base end side coil 51U and the counter side coil 52U and the base end side coil 51V and the counter side coil 52V are housed in the same slot portion 47 (the space between the two protruding portions 463 shown in FIGS. 6 and 7). Coil. In addition, the first insulating portion 90 includes a first radial line portion 63U and a first radial line portion 63U disposed between the coil end portions 57U and 57V of the base end side coils 51U and 51V in the radial region 93 of the covering portion 92. The two radial line portions 64U are covered from the circumferential direction (see FIG. 6), and the first radial line portion 63U and the second radial line portion 64U are insulated from the coil end portion 57V. The first insulating portion 90 covers the second radial line portion 64U disposed between the coil end portions 58U and 58V of the opposed coils 52U and 52V from the circumferential direction in the radial region 93 of the covering portion 92. (See FIG. 7), the second radial line portion 64U and the coil end portion 58V are insulated. Further, the first insulating portion 90 covers the first circumferential line portion 65U and the second circumferential line portion 66U from the radial direction in the circumferential region 94 of the covering portion 92, and the first circumferential line portion 65U and The second circumferential line portion 66U and the first and second crossing lines 61V and 62V approaching the second circumferential line portion 66U and / or the start portions 55V and 56V of the base end side coil 51V and the counter side coil 52V Insulate.

  Although details are omitted, the first insulating portion 90 disposed between the base end side coil 51V and the counter side coil 52V and the base end side coil 51W and the counter side coil 52W is provided within the slot portion 47. The 51V and the opposing coil 52V are insulated from the proximal coil 51W and the opposing coil 52W. The base end side coil 51V and the counter side coil 52V and the base end side coil 51W and the counter side coil 52W are coils accommodated in the same slot portion 47. In addition, the first insulating portion 90 is a radial region 93 of the covering portion 92 that insulates the first radial line portion 63V and the second radial line portion 64V from the coil end portion 57W, and the second radial line portion. Insulate 64V and coil end portion 58W. Further, the first insulating portion 90 is a circumferential region 94 of the covering portion 92, and the first circumferential line portion 65V and the second circumferential line portion 66V, and the first connecting wire 61W and the second connecting wire approaching the first circumferential line portion 65V. Each part of the wire 62W and / or each start part 55W and 56W of the base end side coil 51W and the counter side coil 52W are insulated.

  The first insulating portion 90 disposed between the base end side coil 51W and the counter side coil 52W and the base end side coil 51U and the counter side coil 52U is within the slot portion 47, and the base end side coil 51W and the counter side coil 52W. And the base side coil 51U and the counter side coil 52U are insulated. The proximal end side coil 51 </ b> W and the opposing side coil 52 </ b> W and the proximal end side coil 51 </ b> U and the opposing side coil 52 </ b> U are coils housed in the same slot portion 47. In addition, the first insulating portion 90 is a radial region 93 of the covering portion 92 and insulates the first radial line portion 63W and the second radial line portion 64W from the coil end portion 57U, and the second radial line portion. Insulate 64W and coil end portion 58U. Further, the first insulating portion 90 is a circumferential region 94 of the covering portion 92, and the first circumferential line portion 65W and the second circumferential direction line portion 66W, and the first and second connecting lines 61U and 61W approaching the first circumferential direction line portion 65W. Each part of the wire 62U and / or the start portions 55U and 56U of the proximal end side coil 51U and the opposing side coil 52U are insulated.

<Effect of this embodiment>
According to this embodiment, the following effects can be obtained.

  (1) A base end side coil 51 and a counter side coil 52 are provided in one tooth portion 46 (see FIG. 1). The opposing coil 52 is provided on the inner side in the radial direction than the proximal coil 51. An end portion 53 of the base end side coil 51 provided in one tooth portion 46 and a start portion 55 of the in-phase base end side coil 51 provided in another tooth portion 46 which is separated by two slots in the rotation direction, Connected by the first crossing 61. The end portion 54 of the opposing coil 52 provided in one tooth portion 46 and the start portion 56 of the in-phase opposing coil 52 provided in the other tooth portion 46 are connected by a second connecting wire 62. Further, the end portion 53 and the start portion 55 of the base end side coil 51 and the end portion 54 and the start portion 56 of the opposing side coil 52 are all provided on the first end surface side in the stacking direction, and the first crossing is provided on the same side. The line 61 and the second connecting line 62 are provided (see FIG. 1). Further, in the radial direction, the end portion 53 of the proximal end side coil 51 is set to the inside from the start portion 55 (the start portion 55 is set to the outside from the end portion 53), and the end portion 54 of the opposed coil 52 is set to the inside (starting position) from the start portion 56. The portion 56 is outside the end portion 54) (see FIG. 1).

  Therefore, it is possible to reduce the thickness of the conducting wire, and the coil end portion 57 of the proximal end side coil 51 and the coil end portion 58 of the opposing side coil 52 can be made compact. In forming the base end side coil 51 and the opposed side coil 52, the conducting wire can be suitably wound. The first connecting wire 61 and the second connecting wire 62 can be suitably arranged on the first end face side in the stacking direction. The height of the coil end portions 57 and 58 can be reduced, and the stator 40 can be made thin (can be miniaturized).

  (2) A covering portion 92 is provided on the first insulating portion 90, and the first radial line portion 63 and the first radial portion 63 are covered with the covering portion 92 so as to cover the first radial line portion 63 and the second radial line portion 64. The two radial direction line portions 64 are arranged between the coil end portions 57 of the proximal end side coil 51 and between the coil end portions 58 of the opposed side coil 52 (see FIGS. 6 and 7). Therefore, the first radial line part 63 is insulated from the coil end part 57 of the proximal end side coil 51 of a different phase, and the second radial direction line part 64 is insulated from the proximal end side coil 51 and the opposing side coil 52 of a different phase. It is possible to insulate from the coil end portions 57 and 58. The first radial line portion 63 and the second radial line portion 64 can be arranged in a gap between one coil end portion 57, 58 and the other coil end portion 57, 58 in a state where insulation is ensured. Thus, an increase in the dimension of the stator 40 in the stacking direction can be suppressed. Since the covering portion 92 is formed by bending an insulating material that forms the first insulating portion 90, the covering portion 92 can be easily provided on the first insulating portion 90.

  A circumferential region 94 is provided in the covering portion 92 of the first insulating portion 90, and the first circumferential line portion 65 of the first connecting wire 61 and the second circumferential line portion 66 of the second connecting wire 62 are connected to the circumferential region 94. It was decided to cover with. Therefore, the first circumferential line portion 65 and the second circumferential line portion 66 intersect each other in the vicinity of the protruding portion 86, and each portion of the first and second crossing lines 61 and 62 of different phases, and / or The start portions 55 and 56 of the proximal-side coil 51 and the opposed-side coil 52 of different phases can be suitably insulated.

  (3) The protrusion 86 is provided on the second insulating portion 80, and the first connecting wire 61 and the second connecting wire 62 are bent along the protruding portion 86 (see FIGS. 1 and 11). Therefore, the first crossover 61 and the second crossover 62 of each phase can be suitably bent by the protrusion 86 and can be stored in the installation portion 84 corresponding to each phase.

  (4) On both sides in the stacking direction, the notch portions 465 are formed in the portions on both sides in the circumferential direction of the protrusions 463 (see FIG. 4A). Therefore, it is possible to bend each conducting wire forming the proximal end side coil 51 and the opposed side coil 52 toward the reference line L in the slot portion 47 (see FIGS. 6 and 7). The height (dimension in the stacking direction) of each coil end portion 57, 58 provided on each side of the first end face 421 and the second end face 422 of the stator core 42 is reduced to suppress an increase in the dimension of the stator 40 in the stacking direction. Can do.

  In order to bend the lead wires in the slot 47 favorably toward the reference line L, in the region corresponding to the first end surface 421 and the second end surface 422, the thickness of the insulating material corresponding to the third insulating portion 78 (stacking direction) In some cases, a portion serving as a fulcrum of bending is formed in a thick insulating material (for example, the corner portion has an R shape) (see the right diagram in FIG. 4B). In such an insulating material, the height of the coil end portion is increased by the increase in thickness in the above-described region (“2t” obtained by adding the thickness increases “t” on both sides in the stacking direction). As a result, the dimensions of the stator in the stacking direction are increased. In this regard, in the stator 40 of the present embodiment, the conducting wire can be deformed toward the reference line L with the notch 465 as a fulcrum (see “P1” shown in FIG. 4A). Therefore, the thickness of the first insulating portion 90 can be made constant, and as described above, an increase in the dimensions of the coil end portions 57 and 58 can be suppressed.

<Modification>
This embodiment can also be performed as follows. The following modifications may be adopted in combination with other modifications as appropriate.

  (1) In the above description, the rotor 30 (see FIG. 1) of the type in which the permanent magnet 34 is provided inside the rotor core 32 has been described as an example. The rotor may be a rotor of a type in which a permanent magnet is provided on the outer peripheral side surface of the rotor core, or a rotor of a type that does not include a permanent magnet. When the rotating machine is a motor, a motor including a rotor in which a permanent magnet is provided on the outer peripheral side surface of the rotor core is referred to as an SPM (Surface Permanent Magnet) motor. The stator core 42 (see FIG. 2) formed by arranging the segments 48 in an annular shape has been described as an example. The stator core may be an integrated stator core. In this case, the stator core is formed by stacking electromagnetic steel sheets while punching them into a shape in which a yoke portion and a plurality of teeth portions are integrated. The segment 48 (see FIG. 3) formed by assembling the yoke portion 45 and the tooth portion 46 has been described as an example. The segment may be configured such that the yoke portion and the teeth portion are integrated and continuous. In this case, the segment is formed by stacking electromagnetic steel sheets while punching them into a shape in which the yoke portion and the teeth portion are integrated.

  In the above, for example, when the rotation direction is used as a reference, the base end side coil 51U and the counter side coil 52U, the base end side coil 51V and the counter side coil 52V, the base end side coil 51W and the counter side coil 52W are The configuration (see FIG. 1) repeatedly arranged in the order of phase, V phase and W phase has been described as an example. The arrangement of the base end side coil 51 and the counter side coil 52 of each phase is different from this, and the base end side coil 51 and the counter side coil 52 of the same phase may be arranged adjacent to each other by a predetermined number. Good. The arrangement of the base end side coil 51 and the counter side coil 52 of each phase is appropriately set in consideration of, for example, the relationship with the number of poles of the rotor 30. The covering portion 92 in the first insulating portion 90 is a position where the base end side coil 51 and the opposing side coil 52 of different phases are adjacent to each other, and similarly to the above, predetermined portions of the first connecting wire 61 and the second connecting wire 62 are Cover as above.

  (2) In the above, the connection as shown in FIG. 5 has been described as an example. The connection between the base end side coil 51 and the counter side coil 52 of each phase is as follows. The end portion 53 and the start portion 55 of each base end side coil 51 and the end portion 54 and the start portion 56 of each counter side coil 52 are connected to FIG. May be in the opposite direction. In this case, the connection of the base end side coil 51 of each phase is such that the end portions 53U, 53V, and 53W are on the corresponding terminals 69U, 69V, and 69W sides, and the start portions 55U, 55V, and 55W are on the neutral point side. It becomes. In the connection of the opposing coil 52 of each phase, the end portions 54U, 54V, and 54W are on the corresponding terminals 69U, 69V, and 69W, respectively, and the start portions 56U, 56V, and 56W are on the neutral point side.

  In the above, in the proximal coil 51, the end 53 is radially inward from the start 55 (the start 55 is radially outward from the end 53), and the end 54 is the start in the opposing coil 52. The configuration (see FIG. 1) that is radially inward from 56 (the start portion 56 is radially outward from the end portion 54) has been described as an example. In the proximal coil 51, the end portion 53 is radially outward from the start portion 55 (the start portion 55 is radially inward of the end portion 53), and in the opposing coil 52, the end portion 54 is more diameter than the start portion 56. You may make it become the outer side of the direction (the start part 56 is an inner side of radial direction from the end part 54). Also in this case, the first connecting line connecting the two in-phase proximal coils 51 and the second connecting line connecting the two opposing coils 52 in the same phase are covered with the first insulating portion 90 as described above. The portion 92 is appropriately covered.

  (3) In the above description, the case where the covering target in the covering portion 92 of the first insulating portion 90 is the first connecting wire 61 and the second connecting wire 62 (see FIGS. 6, 7, and 11) has been described as an example. . The first lead lines 70U, 70V, 70W and the second lead lines 72U, 72V, 72W and / or the first lead lines 71U, 71V, 71W and the second lead lines 73U, 73V, 73W (see FIG. 5), Like the first connecting wire 61 and the second connecting wire 62, they are arranged between the coil end portions 57 and 58 of the base end side coil 51 and the opposite side coil 52 of different phases housed in the same slot portion 47. In such a case, the first lead lines 70U, 70V, 70W and the second lead lines 72U, 72V, 72W and / or the first lead lines 71U, 71V, 71W and the second lead are covered as the covering portion 92. Lines 73U, 73V, and 73W may be included. The first lead lines 70U, 70V, 70W and the second lead lines 72U, 72V, 72W and / or the first lead lines 71U, 71V, 71W and the second lead lines 73U, 73V, 73W are connected to the base ends of different phases. It becomes possible to arrange in the gaps between the coil end portions 57 and 58 of the side coil 51 and the opposed coil 52, and the increase in the dimension of the stator 40 in the stacking direction can be suppressed.

  (4) In the above description, the internal rotation type rotating machine 10 (see FIG. 1) in which the rotor 30 is rotatably supported on the inner peripheral side of the stator 40 has been described as an example. The rotating machine may be an abduction type rotating machine. In the stator of the outer rotation type rotating machine, the plurality of tooth portions protrude radially outward from the yoke portion. The rotor of the outer rotation type rotating machine is opposed to the plurality of tooth portions outside the stator. In the outer rotation type rotating machine, the coil corresponding to the opposed coil 52 in the stator 40 of the inner rotation type rotating machine 10 described above is provided on the outer side in the radial direction from the coil corresponding to the proximal end side coil 51 in the stator 40. It is done. The present embodiment can be applied to an abduction type rotating machine in the same manner as described above. A description of the abduction type rotating machine to which this embodiment is applied will be omitted.

DESCRIPTION OF SYMBOLS 10 Rotating machine 30 Rotor, 32 Rotor core, 34 Permanent magnet, 36 Shaft 40 Stator, 42 Stator core, 44 Yoke part, 45 Yoke part 46 Teeth part, 47 Slot part 48 Stator core segment (segment)
51, 51U, 51V, 51W Proximal coil 52, 52U, 52V, 52W Opposing coil U11, U12, U13, U14, U15, U16 Proximal coil U21, U22, U23, U24, U25, U26 Opposing coil V11, V12, V13, V14, V15, V16 Proximal coil V21, V22, V23, V24, V25, V26 Opposing coil W11, W12, W13, W14, W15, W16 Proximal coil W21, W22, W23, W24, W25, W26 Opposite side coil 53, 53U, 53V, 53W End of winding (end)
54, 54U, 54V, 54W End of winding (end)
55, 55U, 55V, 55W Winding start (start)
56, 56U, 56V, 56W Winding start (start)
57, 57U, 57V, 57W Coil end portion 58, 58U, 58V, 58W Coil end portion 61, 61U, 61V, 61W First crossover 62, 62U, 62V, 62W Second crossover 63, 63U, 63V, 63W First One radial direction line part 64, 64U, 64V, 64W Second radial direction line part 65, 65U, 65V, 65W First circumferential direction line part 66, 66U, 66V, 66W Second circumferential direction line part 67U, 67V, 67W End side connecting coil 68U, 68V, 68W Opposite side connecting coil 69U, 69V, 69W Terminal 70U, 70V, 70W First lead wire 71U, 71V, 71W First lead wire 72U, 72V, 72W Second lead wire 73U, 73V, 73W Second lead wire 78 Third insulating portion 80 Second insulating portion 82 Insulating module, 84, 84U, 84V, 84W Installation portion 86 Origin, 87 Claw part, 88 Concave part, 89 Convex part 90 First insulating part, 92 Covering part, 93 Radial area, 94 Circumferential area 95 First wall part, 96 Second wall part, 98 Air gap, 99 Slit part 421 First end surface, 422 Second end surface 451 Concavity, 453 Convex, 455 Engagement groove 461 Engagement protrusion, 463 Protrusion, 465 Notch, 467 Opposing part L Reference line

Claims (8)

A rotor provided rotatably,
A stator,
The stator is
Is formed by laminating steel plates, the yoke portion, protrudes into the first side in the radial direction around the rotation axis of said rotor from said yoke section, arranged at predetermined intervals in a circumferential direction around the rotation axis A plurality of teeth portions, and a stator core comprising:
A first coil provided in a first tooth portion of the plurality of tooth portions ;
A second coil in phase with the first coil, provided on the first side in the radial direction from the first coil in the first teeth portion;
A third coil of a phase different from the first coil, provided in a second tooth portion of the plurality of tooth portions adjacent to the first tooth portion in the circumferential direction;
A fourth coil in phase with the third coil, provided on the first side in the radial direction from the third coil in the second teeth portion;
A first connecting line portion continuously connected to the first end of the first coil;
A second connecting line portion continuously connected to the first end of the second coil;
The first coil and the second coil of the first tooth portion, and the slot portion housed in a slot portion formed between the first tooth portion and the second tooth portion. Between the third coil and the fourth coil of the second teeth portion, which is provided in the stacking direction in which the steel plates are stacked on the stator core, and the first coil and A first insulating part that insulates the second coil from the third coil and the fourth coil ;
The first connection line portion has a diameter between the coil end portion of the first coil and the coil end portion of the third coil on the first end surface side of the stator core in the stacking direction. A first radial line portion arranged in a state extending from the first side of the direction to the second side of the radial direction,
The second connection line portion is on the first end face side, the coil end portion of the second coil, the coil end portion of the first coil, the coil end portion of the fourth coil, and the third coil. A coil end portion of the coil, and a second radial line portion arranged in a state extending from the radial first side to the radial second side,
The first insulating portion is formed by bending an end portion on the first end surface side toward the slot portion side in the stacking direction, and a coil end of the second coil on the first end surface side. Between the coil end portion of the first coil and the coil end portion of the fourth coil, and the coil end portion of the fourth coil and the coil end portion of the third coil. Comprising a covering portion arranged in a state extending to the second side;
It said first radial line portion and the second radial line unit, the rotating machine that covered with the covering portion. The covering portion includes a first wall portion and a second wall portion facing each other,
The second wall portion includes a slit portion through which the first radial line portion passes and the first radial line portion is disposed in a gap between the first wall portion and the second wall portion. Provided,
2. The rotating machine according to claim 1, wherein the first radial line portion is covered with the covering portion in a state of passing through the slit portion and disposed in the gap . The stator is
A fifth coil in phase with the first coil, provided in a third tooth portion of the plurality of tooth portions;
The third tooth portion, provided on the first side in the radial direction from the fifth coil, and a sixth coil in phase with the fifth coil;
Wherein the first connecting line section includes a first end portion of said first coil, a pre-Symbol first pass line connecting the second end of the fifth coil, and
The second connecting line section, a first end of said second coil, and a second end portion of the front Symbol sixth coil, a second pass line connecting, to claim 1 or claim 2 The rotating machine described. The first end of the first coil, the first end of the second coil, the second end of the fifth coil, and the second end of the sixth coil are: prior miracle layer direction provided on a side of the first end surface of said stator core,
The first connecting line portion as the first connecting line connects the first end portion of the first coil and the second end portion of the fifth coil on the first end face side,
The second connection line portion as the second connecting line connects the first end portion of the second coil and the second end portion of the sixth coil on the first end face side. The rotating machine according to 3. The stator includes a second insulating portion that insulates the stator core from the first connection line portion and the second connection line portion on the first end face side.
The second insulating part is
Formed by front along the distichum direction to the yoke portion, and the installation portion of the first connecting line section and the second connecting line section is arranged,
A projection that is provided on the first side in the radial direction from the installation portion and protrudes in the stacking direction;
Wherein the first connecting line section and the second connecting line section, along the protrusion is bent in the circumferential direction, Ru disposed in the installation unit, rotary machine according to claim 4. The first end of the first coil is provided on the first side in the radial direction from the second end of the first coil,
The first end of the second coil is provided on the first side in the radial direction from the second end of the second coil,
The second end of the fifth coil is provided on the second side in the radial direction from the first end of the fifth coil,
The rotation according to any one of claims 3 to 5, wherein the second end of the sixth coil is provided on the second side in the radial direction from the first end of the sixth coil. Machine. Wherein the plurality of teeth is provided with a notch which protrusions are coils of projecting the stator is provided from the yoke portion in the radial direction is cut before miracle layer direction,
The notch is a second end face side of the stator core opposite the front SL side and side of the first end surface of the first end surface in the stacking direction, and, formed on both sides of the front distichum direction The rotating machine according to any one of claims 1 to 6.   The rotating machine according to claim 7, wherein the stator includes a third insulating portion that is formed of an insulating material having a constant thickness, covers an outer periphery of the protruding portion, and insulates the protruding portion from the coil.

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