JP2013009502A - Stator of rotary electric machine and rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine and a rotary electric machine capable of reliably insulating a coil between different phases.SOLUTION: In a core unit 4, a coil 6 is wound around a core tooth 5 via a bobbin assembly 7. Guide grooves 78a, 78b, 78c are parallely aligned on outer peripheries of coil guide parts 77 of the bobbin assembly 7 in a rotation axis direction. The plural core units 4 are annularly aligned, and therefore, the adjacent guide grooves 78a, 78b, 78c are connected to each other, and circumferential grooves L1a, L1b, L1c are formed across an entire circumference. After high-voltage side ends 61v, 61w, 61u of the coil 6 are drawn from coil extraction holes L2a, L2b, L2c formed on the respective circumferential grooves L1a, L1b, L1c on an abutting face of the adjacent coil guide parts 77, they are drawn on the circumferential grooves L1a, L1b, L1c and bundled for each of the high-voltage side ends 61v, 61w, 61u of the coil 6 of each phase.

Description

  The present invention relates to a stator of a rotating electrical machine that drives a rotor disposed so as to face the rotor, and a rotating electrical machine including the stator.

On the outer peripheral surface of the ring-shaped bobbin, a plurality of passages partitioned from each other by standing walls are arranged in parallel in the rotation axis direction, and one end of the plurality of coils is connected to each phase in order to feed power to the coil wound around the core. There has been a conventional technique related to a stator of a rotating electrical machine that is routed and arranged on a passage corresponding to (see, for example, Patent Document 1).
In the stator disclosed in Patent Document 1, one end portion drawn from each coil is passed through a slit that traverses the above-described passage and led to the corresponding passage. Accordingly, it is possible to easily arrange the coil ends for power feeding, and it is possible to secure the distance between the phases by the standing walls located between the passages and to insulate the coils between the different phases.

US Patent Application Publication No. 2010/0133947

However, in the stator disclosed in Patent Document 1, as described above, the slit into which the coil is inserted crosses each passage, and the standing wall partitioning the passage by the slit is partially cut away. As a result, it is difficult to ensure the distance between the phases only in the portion where the slits are formed on each passage, and there is a problem that the insulation of the coil between the phases becomes insufficient.
When the insulation of the coils between the phases becomes insufficient, the current flowing into each coil becomes inaccurate, which may cause a problem in the operation of the rotating electrical machine.
This invention is made | formed in view of the said situation, The objective is to provide the stator and rotary electric machine of a rotary electric machine which can insulate the coil between different phases reliably.

  In order to solve the above-described problems, the structure of the stator of the rotating electrical machine according to claim 1 includes a plurality of core teeth that extend in the radial direction and are arranged in an annular shape, and a bobbin in each core tooth. Forming a plurality of power feeding phases each including a predetermined number of coils and bundling one end portions of the plurality of coils included in the same power feeding phase, and supplying power for each power feeding phase. A stator of a rotating electrical machine including a power supply unit capable of supplying or recovering power, wherein the power supply unit includes a plurality of coil guide members formed of an insulating material and to which corresponding coils are attached, On the outer peripheral surface of the coil guide member, a plurality of guide grooves extending in the circumferential direction are juxtaposed in the rotation axis direction of the rotor, and when the plurality of coils are arranged in an annular shape, the coil guide member is Adjacent ones are butted together in the circumferential direction to form a ring guide having a ring shape, and the guide grooves of adjacent coil guide members are connected to each other on the outer peripheral surface of the ring guide, A plurality of circumferential grooves separated from each other corresponding to each feeding phase are formed so as to be aligned in the rotation axis direction, and when adjacent coil guide members are abutted with each other, between the ends of the adjacent guide grooves Is formed with an extraction hole penetrating the inner and outer peripheral surfaces of the ring guide, and one end of each coil is drawn from the inner peripheral surface of the ring guide to the outer peripheral surface via the extraction hole. In other words, it is drawn around a circumferential groove corresponding to the power feeding phase and bundled for each power feeding phase on the outer peripheral surface of the ring guide.

  According to a second aspect of the present invention, in the stator of the rotating electric machine according to the first aspect, the outer peripheral surface of the coil guide member is juxtaposed in the rotational axis direction with respect to the guide groove and extends in the circumferential direction. When a plurality of coil guide members are arranged in an annular shape, a neutral circle separated from the guide groove is formed on the outer peripheral surface of the ring guide by the neutral guide groove. When a circumferential groove is formed and adjacent coil guide members are abutted against each other, a neutral drawer that penetrates the inner and outer peripheral surfaces of the ring guide between the ends of the adjacent neutral guide grooves A hole is formed, and the other end of each coil is pulled out from the inner peripheral surface of the ring guide to the outer peripheral surface through the neutral lead-out hole, and is then drawn around the neutral circumferential groove to obtain a predetermined number of The other ends are mutually on the outer peripheral surface of the ring guide. It is to be continued.

  According to a third aspect of the present invention, in the stator of the rotating electric machine according to the first or second aspect, a plurality of guide grooves arranged in parallel in the rotational axis direction on the circumferential abutting surfaces of adjacent coil guide members. The portion between or the guide groove and the neutral guide groove is formed by a bent surface.

  According to a fourth aspect of the present invention, in the stator of the rotating electrical machine according to any one of the first to third aspects, the coil guide member is integrally formed with the bobbin.

  According to a fifth aspect of the present invention, there is provided a rotating electrical machine including a rotor rotatably attached to the housing and a stator attached to the housing so as to face the rotor, wherein the stators are respectively in the radial direction. A plurality of core teeth extending in an annular shape, a coil wound around each core tooth via a bobbin, and a plurality of power supply phases each including a predetermined number of coils are formed to provide the same power supply A rotating electrical machine having a power supply unit capable of supplying power or recovering power for each power supply phase by bundling one end portions of a plurality of coils included in a phase, wherein the power supply unit is made of an insulating material. And a plurality of guide grooves extending in the circumferential direction on the outer peripheral surface of each coil guide member. When a plurality of coils are arranged in an annular shape, the coil guide members form a ring guide that exhibits a ring shape by abutting adjacent ones in the circumferential direction. The guide grooves of adjacent coil guide members are connected to each other, and on the outer peripheral surface of the ring guide, a plurality of circumferential grooves that are separated from each other corresponding to the respective power feeding phases are arranged in the rotation axis direction. When the adjacent coil guide members are abutted with each other, a lead-out hole penetrating the inner peripheral surface and the outer peripheral surface of the ring guide is formed between the ends of the adjacent guide grooves. One end of the coil is pulled out from the inner peripheral surface of the ring guide to the outer peripheral surface through the extraction hole, and then drawn around the circumferential groove corresponding to the power feeding phase. It is to be bundled for each feeding phase.

According to the stator of the rotating electrical machine according to claim 1, the adjacent coil guide members are abutted in the circumferential direction, whereby the respective guide grooves of the adjacent coil guide members are connected to each other, and the outer peripheral surface of the ring guide On the top, a plurality of circumferential grooves separated from each other corresponding to each feeding phase are formed so as to be aligned in the rotation axis direction, and one end of the coil is drawn between the ends of the adjacent guide grooves A hole is formed, and one end of each coil is drawn out from the inner peripheral surface of the ring guide to the outer peripheral surface through the lead-out hole, and then drawn around the circumferential groove corresponding to the power feeding phase. They are bundled for each feeding phase on the outer peripheral surface.
Thereby, since the drawing hole from which the one end part of the coil is drawn out is formed on the corresponding circumferential groove, when the one end part of the coil is drawn out, it does not intersect with the coil of the other phase, An insulation distance between the coils can be ensured.

  In addition, since the drawing hole from which one end of the coil is drawn is formed between the ends of the adjacent guide grooves, the circumferential direction of the coil guide member when passing the one end of the coil through the drawing hole Since it can be easily inserted from the end, and after passing through one end of the coil, each circumferential groove can be partitioned by abutting adjacent coil guide members in the circumferential direction. The distance between each phase is ensured and the coil between each phase can be reliably insulated.

According to the stator of the rotating electric machine according to claim 2, when the plurality of coil guide members are arranged in an annular shape, the neutral guide groove separates the guide groove on the outer peripheral surface of the ring guide. When the adjacent circumferential guide grooves are formed and adjacent coil guide members are abutted with each other, the end portions of the adjacent neutral guide grooves pass through the inner and outer peripheral surfaces of the ring guide. A neutral lead hole is formed, and the other end portion of each coil is drawn from the inner peripheral surface of the ring guide to the outer peripheral surface through the neutral lead hole, and then drawn around the neutral circumferential groove. The predetermined number of other ends are connected to each other on the outer peripheral surface of the ring guide.
Thereby, since the neutral lead-out hole from which the other end of the coil is pulled out is formed on the neutral circumferential groove, when the other end of the coil is pulled out, it does not intersect with the coil of each phase, An insulation distance between the input / output side of each phase coil and the neutral point can be secured.

  In addition, since the neutral lead hole from which the other end of the coil is drawn is formed between the ends of the adjacent neutral guide grooves, the other end of the coil is passed through the neutral lead hole. The circumferential groove of the coil guide member can be easily inserted from the circumferential end of the coil guide, and after passing the other end of the coil, the adjacent coil guide members are butted against each other in the circumferential direction. And the neutral circumferential groove can be partitioned, so that the distance between one end and the other end of the coil corresponding to each phase is secured, and the input / output side of each phase coil and the neutral It is possible to reliably insulate between the points.

  According to the stator of the rotating electrical machine according to claim 3, at the circumferential abutting surfaces of the adjacent coil guide members, the portion between the guide grooves arranged side by side in the rotation axis direction or the guide grooves and neutrality Since the portion between the guide grooves is formed by a bent surface, a portion overlapping in the rotation axis direction is formed on the abutting surfaces of adjacent coil guide members, and an insulating distance on the abutting surface is ensured. Therefore, it is possible to reliably perform the insulation of the coils between the phases and the insulation between the input / output sides of the coils of the respective phases and the neutral point.

  According to the stator of the rotating electrical machine of the fourth aspect, the coil guide member is formed integrally with the bobbin, so that the coil guide member can be attached to the coil at the same time by winding the coil around the bobbin. The stator of a rotating electrical machine that is easy to manufacture and low cost can be obtained.

According to the rotating electrical machine of the fifth aspect, adjacent coil guide members are abutted in the circumferential direction, whereby the guide grooves of adjacent coil guide members are connected to each other on the outer peripheral surface of the ring guide. A plurality of circumferential grooves separated from each other corresponding to the respective power feeding phases are formed to be aligned in the direction of the rotation axis, and an extraction hole from which one end of the coil is drawn is provided between the ends of the adjacent guide grooves. One end of each coil is formed and pulled out from the inner peripheral surface of the ring guide to the outer peripheral surface through the extraction hole, and then drawn around the circumferential groove corresponding to the power feeding phase, and the outer peripheral surface of the ring guide In the above, it is bundled for each feeding phase.
Thereby, since the drawing hole from which the one end part of the coil is drawn out is formed on the corresponding circumferential groove, when the one end part of the coil is drawn out, it does not intersect with the coil of the other phase, An insulation distance between the coils can be ensured.

  In addition, since the drawing hole from which one end of the coil is drawn is formed between the ends of the adjacent guide grooves, the circumferential direction of the coil guide member when passing the one end of the coil through the drawing hole Since it can be easily inserted from the end, and after passing through one end of the coil, each circumferential groove can be partitioned by abutting adjacent coil guide members in the circumferential direction. The distance between each phase is ensured and the coil between each phase can be reliably insulated.

1 is an axial sectional view of an electric motor according to Embodiment 1 of the present invention. Overall perspective view of the stator shown in FIG. A perspective view when the coil unit is viewed from the inner peripheral side of the stator Exploded perspective view of core teeth and bobbin assembly A perspective view of the upper bobbin when viewed from the outer peripheral side of the stator Enlarged sectional view of the stator coil guide Partial perspective view when the coil guide portion is viewed from the inner peripheral side of the stator Partial side view when the stator is viewed from the outer peripheral side to show details of the coiled state Simplified view of the stator for explaining the method of routing the high voltage side end of each coil Simplified view of stator for explaining a method of routing the low voltage side end of each coil Simplified view of the stator for explaining a method of routing the high-pressure side end according to a modified example Enlarged side view when the stator is viewed from the outer peripheral side in order to show the shape of the butting surfaces of adjacent coil guide portions The perspective view which showed the state when attaching a coil assembly to a stator ring The perspective view at the time of seeing two types of coil units by Embodiment 2 from the inner peripheral side of a stator, respectively Simplified plan view showing a state where the coil unit is assembled to the core body according to the second embodiment. A simplified plan view showing a state where the coil unit is assembled to the core body.

<Embodiment 1>
An electric motor M (corresponding to a rotating electrical machine) and its stator 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. In the description, the vertical direction in FIG. 3 is defined as the vertical direction of the coil unit 4, which is irrelevant to the actual direction on the stator 1. Further, in the description of the coil unit 4, when referring to the radial direction or the circumferential direction, it is assumed that the coil unit 4 is in the stator 1, and means the radial direction or the circumferential direction of the stator 1. . Further, in the description, the term “rotating shaft” means the rotating shaft φ (shown in FIG. 1) of the rotor R unless otherwise specified.

  As shown in FIG. 1, the electric motor M is fixed to the motor housing H so that the rotor R is rotatably attached to the motor housing H (corresponding to the housing) and is opposed to the rotor R in the radial direction. The stator 1 is provided. A plurality of magnets (not shown) are mounted on the circumference of the rotor R, and are driven by a rotating magnetic field generated when electric power is supplied to the stator 1. Since the rotor R is not the subject of the present invention, no further explanation is given.

  As shown in FIG. 2, the stator 1 is formed by shrink fitting a coil assembly 3 formed by arranging a plurality of coil units 4 in an annular shape on the inner peripheral surface of the stator ring 2. In the coil assembly 3, the coil units 4 are arranged clockwise in FIG. 2 in the order of V-phase, U-phase, and W-phase. In the coil unit 4, a coil 6 is wound around a core tooth 5 divided for each coil unit 4 via a bobbin assembly 7 (corresponding to a bobbin formed by a lower bobbin 7 a and an upper bobbin 7 b as described later). (FIG. 3 is shown).

  Each of the core teeth 5 is formed by laminating a plurality of electromagnetic steel plates, and extends in the radial direction in a state of being arranged in an annular shape to form the stator 1 (see FIGS. 1 and 2). ). Each core tooth 5 is connected to the outer side of the teeth part 52, the inner flange part 51 located at the inner end in the stator 1, the tooth part 52 extending radially outward from the inner flange part 51, and The cross-sectional shape formed by the back yoke portion 53 extending in the circumferential direction and perpendicular to the rotation axis is substantially T-shaped (shown in FIG. 4). As will be described later, when the stator 1 is formed, the outer peripheral surface of the back yoke portion 53 is shrink-fitted to the inner peripheral surface of the stator ring 2.

  As shown in FIG. 4, the bobbin assembly 7 is formed in a state of being divided into two in the vertical direction by an insulating synthetic resin material. The lower bobbin 7a located below includes a lower winding portion 71 that extends in a cylindrical shape in the radial direction so that the coil 6 is wound, and a lower inner flange 72 that is connected radially inward of the lower winding portion 71. And a lower outer flange 73 connected to the outer side of the lower winding portion 71 in the radial direction.

  The upper end of the lower winding part 71 is open, and the teeth part 52 of the core teeth 5 is inserted from above. In a state where the core teeth 5 are mounted on the lower bobbin 7a, the lower inner flange 72 abuts against the inner flange 51 from the radially outer side, and the inner flange 51 protrudes radially inward from the lower inner flange 72. ing. Further, in a state where the core teeth 5 are mounted on the lower bobbin 7a, the lower outer flange 73 abuts against the back yoke portion 53 from the radially inner side, and the back yoke portion 53 protrudes radially outward from the lower outer flange 73. ing.

On the other hand, the upper bobbin 7b located on the upper side, like the lower bobbin 7a, includes an upper winding portion 74 that extends in a cylindrical shape in the radial direction, and an upper inner flange 75 that is connected radially inward of the upper winding portion 74. The upper outer flange 76 is connected to the outer periphery of the upper winding portion 74 in the radial direction.
The lower end of the upper winding part 74 is open, and the teeth part 52 of the core teeth 5 is inserted from below. In a state where the core teeth 5 are mounted on the upper bobbin 7b, the upper inner flange 75 abuts against the inner flange 51 from the radially outer side, and the inner flange 51 protrudes radially inward from the upper inner flange 75. ing. Further, in a state where the core teeth 5 are mounted on the upper bobbin 7b, the upper outer flange 76 contacts the back yoke portion 53 from the inside in the radial direction, and the back yoke portion 53 projects outward in the radial direction from the upper outer flange 76. (Shown in FIG. 3).
In the state where the lower bobbin 7a and the upper bobbin 7b are mounted on the core teeth 5, the joints of both the bobbins 7a and 7b are flat, and the coil 6 is wound around the lower winding part 71 and the upper winding part 74 which are integrated. Is done.

As shown in FIG. 5, a coil guide portion 77 (corresponding to a coil guide member) is integrally formed at the upper end portion of the upper bobbin 7b. The outer peripheral surface of the coil guide portion 77 is formed on an arc, and four guide grooves 78a, 78b, 78c, 78d (the guide groove 78d corresponds to a neutral guide groove) are arranged in the direction of the rotation axis (in FIG. 5). (From top to bottom). The guide grooves 78a, 78b, 78c, 78d each extend in the circumferential direction (of the stator 1).
When a plurality of coil units 4 are arranged in an annular shape, adjacent coil guide portions 77 are brought into contact with each other in the circumferential direction, whereby a ring guide portion L (corresponding to a ring guide) having a ring shape is formed. Form (shown in FIG. 2).

On the outer peripheral surface of the ring guide portion L, the guide grooves 78a, 78b, 78c of the adjacent coil guide portions 77 are connected to each other, and a plurality of circumferential grooves L1a, L1b, L1c separated from each other are connected to the ring guide portion 77. It is formed over the entire circumference of the guide portion L. The plurality of circumferential grooves L1a, L1b, and L1c are formed so as to be aligned in the rotation axis direction (from the top to the bottom in FIG. 2) (shown in FIGS. 2 and 8).
Moreover, adjacent guide grooves 78d are connected to each other on the outer peripheral surface of the ring guide portion L by abutting adjacent ones of the coil guide portions 77 in the circumferential direction, and the circumferential grooves L1a and L1b described above are connected. A circumferential groove L1d separated from L1c (corresponding to a neutral circumferential groove) is formed over the entire circumference of the ring guide portion L. The circumferential groove L1d is arranged in parallel with the circumferential groove L1c downward in the rotation axis direction (shown in FIGS. 2 and 8).

  The circumferential grooves L1a, L1b, and L1c are high-voltage side end portions 61v, 61w, and 61u of the coils 6 included in the coil units 4 corresponding to the V phase, the W phase, and the U phase (each corresponding to a power feeding phase). The coil 6 is an input / output side end portion corresponding to one end portion, and the circumferential groove L1d is a low voltage side end portion 62v, 62w, 62u of the coil 6 (neutral point of the coil 6). A side end portion corresponding to the other end portion is accommodated (shown in FIGS. 6 and 8). The circumferential grooves L1a, L1b, L1c, and L1d are partitioned and insulated from each other by walls Lwa, Lwb, and Lwc (shown in FIGS. 6 and 8) between them.

  Hereinafter, with respect to the end portions 61v, 61w, 61u, 62v, 62w, and 62u of the coil 6, the high-voltage side end portion 61v and the low-voltage side end portion 62v are both end portions of the coil 6 corresponding to the V phase, 61w and the low voltage side end 62w are both ends of the coil 6 corresponding to the W phase, and the high voltage side end 61u and the low voltage side end 62u are both ends of the coil 6 corresponding to the U phase. Further, in all the coil units 4, the high voltage side end portions 61 v, 61 w, 61 u are unified with the end portion on the same side (winding start side or winding end side) with respect to the winding direction of the coil 6.

  As shown in FIGS. 7 and 8, when the adjacent coil guide portions 77 are abutted, the ring guide portions L of the ring guide portions L are disposed between the end portions of the adjacent guide grooves 78a, 78b, 78c, 78d. There are coil lead-out holes L2a, L2b, L2c, and L2d (coil lead-out holes L2a, L2b, and L2c correspond to lead-out holes, and coil lead-out hole L2d corresponds to a neutral lead-out hole) that penetrates the inner peripheral surface and the outer peripheral surface. Each is formed.

  The high voltage side end portion 61v of the coil 6 included in each coil unit 4 corresponding to the V phase is guided upward and pulled out from the inner peripheral surface of the ring guide portion L to the outer peripheral surface via the coil extraction hole L2a ( FIG. 7 shows). The (five) high-voltage side end portions 61v of each coil 6 corresponding to the V phase are respectively drawn out from the coil lead-out hole L2a to the outer peripheral surface of the ring guide portion L, and then pulled over the corresponding circumferential groove L1a. Turned (shown in FIG. 8). After the plurality of high-pressure side end portions 61v are routed on the circumferential groove L1a, they are bundled together and pulled out from the circumferential groove L1a radially outward at one place on the outer circumferential surface of the ring guide portion L, It is caulked by the V-phase terminal 63 (shown in FIG. 2).

  Further, the high voltage side end 61w of the coil 6 included in each coil unit 4 corresponding to the W phase is guided upward and pulled out from the inner peripheral surface of the ring guide portion L to the outer peripheral surface via the coil extraction hole L2b. Then, it is routed on the corresponding circumferential groove L1b (shown in FIG. 8). The plurality of high-pressure side end portions 61w are routed on the circumferential groove L1b, and then bundled together and pulled out radially outward from the circumferential groove L1b at one place on the outer circumferential surface of the ring guide portion L, It is caulked by the W-phase terminal 64 (shown in FIG. 2).

  Further, the high voltage side end portion 61u of the coil 6 included in each coil unit 4 corresponding to the U phase is guided upward and pulled out from the inner peripheral surface of the ring guide portion L to the outer peripheral surface via the coil extraction hole L2c. Then, it is routed on the corresponding circumferential groove L1c (shown in FIG. 8). The plurality of high-pressure side end portions 61u are routed on the circumferential groove L1c, and then bundled together and pulled out from the circumferential groove L1c radially outward at one place on the outer circumferential surface of the ring guide portion L, It is caulked by the U-phase terminal 65 (shown in FIG. 2).

  Here, as shown in FIG. 3, the high voltage side end portions 61v, 61w, 61u of each coil 6 are arranged in the circumferential direction end portion of the coil guide portion 77 (see FIG. 3) before assembling the plurality of coil units 4 in an annular shape. From the right end portion in FIG. 3, the coil guide holes 77 are inserted into the opened coil lead-out holes L <b> 2 a, L <b> 2 b, and L <b> 2 c and are drawn to the outer peripheral surface side of the coil guide portion 77. After the high voltage side end portions 61v, 61w, 61u of the coil 6 are inserted into the coil extraction holes L2a, L2b, L2c, the adjacent coil guide portions 77 are brought into contact with each other, whereby each coil extraction hole L2a, L2b, L2c is completely closed (shown in FIG. 7).

  On the other hand, the low voltage side end portions 62v, 62w, 62u of the coils 6 included in all the coil units 4 are guided upward and pulled out from the inner peripheral surface of the ring guide portion L to the outer peripheral surface via the coil extraction hole L2d. It is. The low voltage side end portions 62v, 62w and 62u of all the coils 6 are drawn out from the coil drawing hole L2d to the outer peripheral surface of the ring guide portion L, and then drawn around the circumferential groove L1d. On the outer peripheral surface of the ring guide portion L, the low pressure side end portions 62v, 62w, 62u routed on the circumferential groove L1d are bundled as a set of three low pressure side end portions 62v, 62w, 62u, It is caulked by the neutral terminal 66 in the circumferential groove L1d (shown in FIG. 8).

  Here, the low voltage side end portions 62v, 62w, 62u of each coil 6 are arranged in the circumferential direction end portions (high pressure side end portions 61v, 61w, From the end on the opposite side in the circumferential direction with respect to the side from which 61u is pulled out (the right end in FIG. 5), the coil is inserted into the opened coil lead-out hole L2d and pulled out to the outer peripheral surface side of the coil guide 77. It is. After the low voltage side end portions 62v, 62w, 62u of the coil 6 are inserted into the coil extraction hole L2d, the adjacent coil guide portions 77 are brought into contact with each other, whereby the coil extraction hole L2d is completely closed (FIG. 8). Shown).

  As described above, the high voltage side ends 61v, 61w, 61u that are the input / output side ends of the coil 6 corresponding to the V phase, the W phase, and the U phase, and the low voltage side that is the neutral point side end of the coil 6 When the end portions 62v, 62w, and 62u are bundled, independent currents flow through the V-phase terminal 63, the W-phase terminal 64, and the U-phase terminal 65 in the coil assembly 3, so that the V-phase, W-phase, U-phase A power feeding unit capable of supplying power for each phase is formed.

As shown in FIG. 9, in the present embodiment, two of the high-voltage side end portions 61v, 61w, 61u of the coils 6 corresponding to the V-phase, W-phase, and U-phase are respectively corresponding circumferential grooves. L1a, L1b, and L1c are routed clockwise in the drawing, and the remaining three are bundled after being routed counterclockwise on the circumferential grooves L1a, L1b, and L1c.
Therefore, depending on the position on the circumference of the ring guide portion L, the circumferential grooves L1a, L1b, and L1c are routed by the plurality of high-voltage side end portions 61v, 61w, and 61u. In L1a, L1b, and L1c, two or three high-pressure side end portions 61v, 61w, and 61u may overlap in the radial direction of the stator 1 (shown in FIG. 6).

On the other hand, as shown in FIG. 10, the low voltage side end portions 62v, 62w, 62u of all the coils 6 are respectively drawn in the counterclockwise direction on the circumferential groove L1d, so that in the circumferential groove L1d. After the stator 1 is overlapped in the order of the low pressure side end portions 62u, 62v, 62w from the radially inner side of the stator 1, it is caulked every three (shown in FIG. 6).
Further, unlike the case described above, as shown in FIG. 11, the high voltage side end portions 61v, 61w, 61u of the coils 6 corresponding to the V phase, the W phase, and the U phase are connected to the terminals 63, 64, 65, respectively. All but one of the latest ones may be bundled after being drawn clockwise (only the high voltage side end 61v of the coil 6 corresponding to the V phase is shown in FIG. 11).

  As shown in FIGS. 8 and 12, on the circumferential abutting surfaces of adjacent coil guide portions 77, portions located between the guide grooves 78a, 78b, 78c, 78d (walls Lwa, Lwb, Lwc, respectively). Since the upper part) is formed by a crank-like surface bent in the circumferential direction, a part P that overlaps in the rotation axis direction is formed on the abutting surface.

  When the stator 1 is formed, the coil units 4 are arranged in an annular shape, and then the high voltage side end portions 61v, 61w, 61u and the low voltage side end portions 62v, 62w, 62u of the coil 6 are connected to the outer periphery of the ring guide portion L. The coil assembly 3 is formed by being drawn and bundled on the surface. Thereafter, as shown in FIG. 13, the coil assembly 3 is shrink-fitted onto the inner peripheral surface of the stator ring 2 to complete the stator 1.

As a method for attaching the coil assembly 3 to the stator ring 2, press-fitting at normal temperature may be performed. Further, when the coil assembly 3 is held in the stator ring 2 by press-fitting, an adhesive may be interposed between the coil assembly 3 and the stator ring 2 to increase the holding force.
The stator 1 is fixed to the motor housing H by inserting the mounting bolts B into the mounting holes 22 formed in the flange portion 21 of the stator ring 2 and tightening them to the motor housing H (shown in FIG. 1).

  According to this embodiment, the adjacent coil guide portions 77 are abutted in the circumferential direction, whereby the guide grooves 78a, 78b, 78c of the adjacent coil guide portions 77 are connected to each other, and the ring guide portion L is connected. A plurality of circumferential grooves L1a, L1b, L1c corresponding to the V-phase, W-phase, and U-phase, respectively, are formed on the outer circumferential surface of the outer circumferential surface so as to be aligned in the rotation axis direction, and adjacent guide grooves 78a, 78b. , 78c, coil lead holes L2a, L2b, L2c from which the high voltage side ends 61v, 61w, 61u of the coil 6 are drawn are formed, and the high voltage side ends 61v, 61w of each coil 6 are formed. 61u is pulled out from the inner peripheral surface of the ring guide portion L to the outer peripheral surface via the coil extraction holes L2a, L2b, L2c, and then the circumferential groove L1 corresponding to the V phase, the W phase, and the U phase. , L1b, routed over L1c, on the outer peripheral surface of the ring guide portion L, V phase, W-phase are bundled for each coil 6 corresponding to the U-phase.

Accordingly, the coil lead-out holes L2a, L2b, and L2c from which the high-voltage side end portions 61v, 61w, and 61u of the coil 6 are drawn are formed on the corresponding circumferential grooves L1a, L1b, and L1c. When the side end portions 61v, 61w, 61u are pulled out, the insulation distance between the coils 6 of each phase can be secured without intersecting with the coils 6 of other phases.
In addition, the coil lead-out holes L2a, L2b, and L2c from which the high-voltage side end portions 61v, 61w, and 61u of the coil 6 are drawn are formed between the end portions of the adjacent guide grooves 78a, 78b, and 78c. When passing the high voltage side ends 61v, 61w, 61u of the coil 6 through the drawing holes L2a, L2b, L2c, the coil 6 can be easily inserted from the circumferential end of the coil guide 77 and the high voltage of the coil 6 After passing the side end portions 61v, 61w, 61u, the circumferential grooves L1a, L1b, L1c can be separated from each other by abutting the adjacent coil guide portions 77 in the circumferential direction. The coil 6 between each phase can be reliably insulated by securing the distance.

  Further, when a plurality of coil guide portions 77 are arranged in an annular shape, circumferential grooves L1a corresponding to the V phase, the W phase, and the U phase are formed on the outer peripheral surface of the ring guide portion L by the guide grooves 78d. When the circumferential groove L1d separated from L1b and L1c is formed and the adjacent coil guide portions 77 are abutted with each other, the end portions of the adjacent guide grooves 78d are disposed between the end portions of the ring guide portion L. A lead-out hole L2d penetrating the inner peripheral surface and the outer peripheral surface is formed, and the low-pressure side end portions 62v, 62w, 62u of each coil 6 are connected to the outer peripheral surface from the inner peripheral surface of the ring guide portion L via the lead-out hole L2d. After being drawn out, the lead is drawn around the circumferential groove L1d, and a predetermined number of the low-pressure side end portions 62v, 62w, 62u are connected to each other on the outer peripheral surface of the ring guide portion L.

  Thereby, since the extraction hole L2d from which the low voltage side ends 62v, 62w, 62u of the coil 6 are extracted is formed on the circumferential groove L1d, the low voltage side ends 62v, 62w, 62u of the coil 6 are extracted. In addition, the insulation distance between the input / output side of the coil 6 of each phase and the neutral point can be ensured without intersecting with the high voltage side end portions 61v, 61w, 61u of the coil 6 of each phase.

  Further, since the extraction hole L2d from which the low voltage side end portions 62v, 62w, 62u of the coil 6 are extracted is formed between the ends of the adjacent guide grooves 78d, the extraction hole L2d is connected to the low voltage side end of the coil 6. When passing the parts 62v, 62w, 62u, it can be easily inserted from the circumferential end of the coil guide part 77, and after passing the low pressure side ends 62v, 62w, 62u of the coil 6, A circle that accommodates the circumferential grooves L1a, L1b, L1c and the low-pressure side end portions 62v, 62w, 62u corresponding to the V phase, the W phase, and the U phase by abutting adjacent coil guide portions 77 in the circumferential direction. Since the space between the circumferential groove L1d can be partitioned, the distance between the high voltage side end portions 61v, 61w, 61u and the low voltage side end portions 62v, 62w, 62u of the coil 6 corresponding to each phase is secured, Between the output side and the neutral point of the coil 6 of the phases can be surely insulated.

Further, in the circumferential abutting surfaces of the adjacent coil guide portions 77, the portions located between the plurality of guide grooves 78a, 78b, 78c, 78d arranged in parallel in the rotation axis direction are formed by the bent surfaces. By being formed, a portion P that overlaps in the rotation axis direction is formed on the abutting surfaces of the adjacent coil guide portions 77, and an insulation distance in the abutting surfaces can be secured. Insulation and insulation between the input / output side of the coil 6 of each phase and the neutral point can be reliably performed.
Further, since the coil guide portion 77 is formed integrally with the bobbin assembly 7, the coil guide portion 77 can be attached to the coil 6 at the same time by winding the coil 6 around the bobbin assembly 7. The stator 1 can be manufactured easily and at a low cost.

<Embodiment 2>
A stator 1A according to Embodiment 2 of the present invention will be described with reference to FIGS. In the description, the vertical direction in FIG. 14 is the vertical direction of the coil units 4A and 4B, but is not related to the actual direction on the stator 1A. Further, in the description of the coil units 4A and 4B, when referring to the radial direction or the circumferential direction, it is assumed that the coil units 4A and 4B are in the stator 1A, meaning the radial direction or the circumferential direction of the stator 1A. It shall be. Further, in the description, the term “rotating shaft” means the rotating shaft φ of the rotor R shown in FIG. 1 unless otherwise specified.

  As shown in FIG. 14, the stator 1A according to the present embodiment includes two types of coil units 4A and 4B. As in the case of the first embodiment, the coil units 4A and 4B are formed by winding the coil 6 around the bobbin assemblies 7A and 7B, respectively. Similarly to the first embodiment, before the coil units 4A and 4B are attached to the core body 8 described later, the high voltage side end portions 61v, 61w and 61u and the low voltage side end portions 62v, 62w and 62u of the coil 6 are provided. Is previously drawn from the circumferential ends of the coil guide portions 77A and 77B to the outer peripheral surface. In addition, cavities 79A and 79B for inserting core teeth 81 to be described later are formed inside the bobbin assemblies 7A and 7B, respectively.

  The coil guide portion 77A included in the coil unit 4A on one side shown in FIG. 14 has a larger circumferential length than the coil guide portion 77B included in the coil unit 4B on the other side (FIG. 15). Shown). Guide grooves 78a, 78b, 78c, and 78d are formed on the outer peripheral surfaces of the coil guide portions 77A and 77B (not shown) as in the first embodiment. Further, as will be described later, the adjacent coil guide portions 77A and 77B are butted in the circumferential direction so that the end portions of the guide grooves 78a, 78b, 78c, and 78d are positioned between the end portions of the coil 6 on the high voltage side. Coil extraction holes L2a, L2b, L2c, L2d from which the portions 61v, 61w, 61u or the low-pressure side ends 62v, 62w, 62u are extracted are formed (not shown).

The stator 1A according to the present embodiment includes a core body 8 in which a plurality of core teeth 81 are integrally formed. The core body 8 formed by laminating a plurality of electromagnetic steel plates has a perfect circular outer peripheral ring 82, and the above-described core teeth 81 protrude radially inward from the inner peripheral edge of the outer peripheral ring 82. Yes.
A flange portion 83 having an attachment hole 84 for attaching the stator 1 </ b> A to the motor housing H is formed at the outer peripheral edge portion of the outer peripheral ring 82. Therefore, the stator 1 </ b> A according to the present embodiment does not include the stator ring 2.

As shown in FIG. 15, the two types of coil units 4 </ b> A and 4 </ b> B are alternately attached to the core teeth 81 of the core body 8 from the inside in the radial direction. The core teeth 81 are inserted into the cavities 79A and 79B of the respective bobbin assemblies 7A and 7B until the adjacent coil guide portions 77A and 77B are abutted in the circumferential direction. Thus, the coil units 4A and 4B are arranged in an annular shape on the inner peripheral side of the core body 8 (shown in FIG. 16). In FIG. 16, only a part of the coil units 4A and 4B attached to the core teeth 8 are shown, and the others are omitted.
The coil units 4A and 4B attached to the core teeth 8 are fixed to the core body 8 by filling with epoxy resin.

  The high voltage side end portions 61v, 61w, 61u and the low pressure side end portions 62v, 62w, 62u of the coil 6 drawn out to the outer peripheral surfaces of the coil guide portions 77A, 77B are the same as in the first embodiment. 77A, 77B is routed on the corresponding circumferential groove formed on the outer peripheral surface, and each V-phase, W-phase, U-phase or a predetermined number of low-pressure side end portions 62v, 62w, 62u are bundled together, A power feeding unit capable of supplying power for each phase is formed.

<Other embodiments>
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows.
One of the high-voltage side end portions 61v, 61w, 61u and the low-voltage side end portions 62v, 62w, 62u of the coil 6 is outer peripheral from the inner peripheral surface of the coil guide portion 77 below the coil unit 4 shown in FIG. After being drawn out to the surface, the outer peripheral surface below the coil assembly 3 may be routed.

Further, distributed winding can be applied to the coil 6 of the coil assembly 3 instead of the concentrated winding as described above.
The stator according to the present invention can be applied to a rotating electric machine such as a synchronous motor, an induction motor, or any other electric motor or generator.

  In the drawings, 1, 1A is a stator, 5 is a core tooth, 6 is a coil, 7 is a bobbin assembly (bobbin), 61v, 61w and 61u are high-pressure side ends (one end), and 62v, 62w and 62u are low-pressure sides. End part (other end part), 77 is a coil guide part (coil guide member), 78a, 78b and 78c are guide grooves, 78d is a guide groove (neutral guide groove), H is a motor housing (housing), and L is a ring. L1a, L1b, and L1c are circumferential grooves, L1d is a circumferential groove (neutral circumferential groove), L2a, L2b, and L2c are coil extraction holes (extraction holes), and L2d is a coil extraction hole ( Neutral lead-out hole), M is an electric motor (rotating electric machine), R is a rotor, and φ is a rotating shaft.

Claims (5)

A plurality of core teeth each extending in the radial direction and arranged in an annular shape,
A coil wound around each of the core teeth via a bobbin;
A plurality of power feeding phases each including a predetermined number of the coils are formed, and one end portions of the plurality of coils included in the same power feeding phase are bundled to supply power or recover power for each of the power feeding phases. Possible power supply,
A stator of a rotating electric machine comprising:
The power feeding unit is
A plurality of coil guide members formed of an insulating material, to which the corresponding coils are attached, have a plurality of guide grooves extending in the circumferential direction on the outer peripheral surface of each of the coil guide members. Are arranged in parallel in the axial direction,
When a plurality of the coils are arranged in an annular shape, the coil guide members are adjacent to each other in the circumferential direction to form a ring guide having a ring shape, and the adjacent coils The guide grooves of the guide member are connected to each other, and a plurality of circumferential grooves separated from each other corresponding to the respective power feeding phases are formed on the outer peripheral surface of the ring guide so as to be aligned in the rotation axis direction. And
When the adjacent coil guide members are butted together, between the ends of the adjacent guide grooves, a lead-out hole penetrating the inner peripheral surface and the outer peripheral surface of the ring guide is formed,
The one end of each of the coils is drawn out from the inner peripheral surface of the ring guide to the outer peripheral surface through the extraction hole, and then is routed on the circumferential groove corresponding to the power feeding phase, A stator of a rotating electrical machine that is bundled for each of the feeding phases on the outer peripheral surface of the ring guide. A neutral guide groove is formed on the outer peripheral surface of the coil guide member in parallel with the guide groove in the rotation axis direction and extends in the circumferential direction, and a plurality of the coil guide members are provided. When arranged in an annular shape, a neutral circumferential groove separated from the guide groove is formed on the outer peripheral surface of the ring guide by the neutral guide groove,
When the adjacent coil guide members are abutted against each other, a neutral lead-out hole that penetrates the inner peripheral surface and the outer peripheral surface of the ring guide is provided between the ends of the adjacent neutral guide grooves. Formed,
The other end of each of the coils is pulled out from the inner peripheral surface of the ring guide to the outer peripheral surface through the neutral lead-out hole, and then drawn around the neutral circumferential groove, and a predetermined number The stator of a rotating electrical machine according to claim 1, wherein the other end portions of the ring guides are connected to each other on the outer peripheral surface of the ring guide.   In the circumferential abutting surfaces of the adjacent coil guide members, the portion between the plurality of guide grooves arranged in parallel in the rotation axis direction or the portion between the guide groove and the neutral guide groove is The stator for a rotating electrical machine according to claim 1, wherein the stator is formed by a bent surface.   The stator of the rotating electrical machine according to any one of claims 1 to 3, wherein the coil guide member is formed integrally with the bobbin. A rotor rotatably mounted on the housing;
A stator attached to the housing to face the rotor;
With
The stator is
A plurality of core teeth each extending in the radial direction and arranged in an annular shape,
A coil wound around each of the core teeth via a bobbin;
A plurality of power feeding phases each including a predetermined number of the coils are formed, and one end portions of the plurality of coils included in the same power feeding phase are bundled to supply power or recover power for each of the power feeding phases. Possible power supply,
A rotating electric machine having
The power feeding unit is
A plurality of coil guide members formed of an insulating material, to which the corresponding coils are attached, have a plurality of guide grooves extending in the circumferential direction on the outer peripheral surface of each of the coil guide members. Are arranged in parallel in the axial direction,
When a plurality of the coils are arranged in an annular shape, the coil guide members are adjacent to each other in the circumferential direction to form a ring guide having a ring shape, and the adjacent coils The guide grooves of the guide member are connected to each other, and a plurality of circumferential grooves separated from each other corresponding to the respective power feeding phases are formed on the outer peripheral surface of the ring guide so as to be aligned in the rotation axis direction. And
When the adjacent coil guide members are butted together, between the ends of the adjacent guide grooves, a lead-out hole penetrating the inner peripheral surface and the outer peripheral surface of the ring guide is formed,
The one end of each of the coils is drawn out from the inner peripheral surface of the ring guide to the outer peripheral surface through the extraction hole, and then is routed on the circumferential groove corresponding to the power feeding phase, A rotating electrical machine bundled for each of the feeding phases on the outer peripheral surface of the ring guide.

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