JP2016052224A - Stator, rotary electric machine applying stator thereto, and connection method for stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for a rotary electric machine in which three feeding phases are included, the feeding phases are connected in a Y connection and cost is reduced, the rotary electric machine to which the stator is applied, and a connection method for the stator.SOLUTION: A stator 1 for a rotary electric machine M includes; cores 4A-4F each including a yoke 41a and teeth 41b; and a plurality of coils 6 which are wound around a plurality of teeth so as to form three feeding phases (U phase, V phase and W phase). The three feeding phases are connected with each other in the Y connection and in each coil of each feeding phase, one coil wire is continuously wound over all the teeth via a crossover. In the winding, at a position where a neutral point of each feeding phase is formed in the Y connection, among crossovers, neutral point crossovers of the feeding phases which are mutually conducted to form the neutral point are electrically connected with each other.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stator in which three power feeding phases are Y-connected, a rotating electrical machine to which the stator is applied, and a stator connecting method.

2. Description of the Related Art Conventionally, there is a rotating electrical machine that includes a stator in which a plurality of divided cores are arranged in an annular shape, and the stator includes coils of three power supply phases (U phase, V phase, and W phase) (see Patent Documents 1 to 3). ). In the rotating electrical machines shown in Patent Documents 1 and 2, the power feeding phases are connected to each other by Y-Δ connection via a plurality of bus bars.
Moreover, in the rotary electric machine shown in patent document 3, each electric power feeding phase is connected by Y connection. As a specific method of connection, first, a coil for each feeding phase is continuously wound around a plurality of divided cores. Thereafter, a part of the crossover wire that is an unnecessary part for the Y connection is cut from the coil wound around the split core. Finally, in order to connect the neutral points of the feeding phases that are not yet connected to each other, a conduction clip is added to establish the Y connection.

JP 2013-223296 A JP 2013-223295 A JP 2013-224052 A

  As described above, in the techniques disclosed in Patent Documents 1 and 2, each power feeding phase is connected through a plurality of bus bars. In the technique disclosed in Patent Document 3, a conductive clip is added to connect neutral points. For this reason, in the conventional technology, the cost increases due to an increase in the number of work steps and an increase in the number of parts (bus bars and conductive clips).

  The present invention has been made in view of the above circumstances, and has a three-phase power supply phase, a low-cost rotating electrical machine stator in which the power supply phase is connected by Y-connection, and a rotating electrical machine and stator to which the stator is applied. The purpose is to provide a connection method.

  A stator for a rotating electrical machine according to an aspect 1 of the present invention includes a yoke formed in an arc shape and a plurality of teeth formed to protrude inward in the radial direction of the yoke, and the yoke has an annular shape. And a plurality of coils wound around the plurality of teeth so that three feeding phases are formed, and the three feeding phases are connected to each other by Y connection. In each of the coils of the three feeding phases, a single coil wire is connected to all the plurality of teeth from the winding start tooth to the winding end tooth of the plurality of teeth via the crossover wires. In the winding, at each neutral position of the feeding phase in the Y connection, each of the feeders is electrically connected to each other to form the neutral point. Inside each phase Point connecting wire are electrically connected to each other.

  A stator electrical connection method for an electric rotating machine according to aspect 2 of the present invention includes a yoke formed in an arc shape, and a plurality of teeth formed on the yoke so as to protrude radially inward of the yoke. A stator connection method for a rotating electrical machine comprising an annular core and a plurality of coils wound around the plurality of teeth so that three feeding phases are formed, wherein the three feeding phases are The coils of the three feeding phases are connected to each other by Y connection, and one coil wire is connected to all the plurality of teeth from the winding start tooth to the winding end tooth among the plurality of teeth. A continuous winding step that is continuously wound through a crossover wire, and at the formation position of the neutral point of each feeding phase in the Y connection, the crossover wires are electrically connected to each other, and Shape neutral point Each neutral point connecting wire ends of the respective feeding phase comprises a electrically connected to the neutral point connecting wire connecting step.

  According to the stator of the rotating electrical machine according to aspect 1, one coil wire is wound from the winding start tooth to the winding end tooth in the manner of one-stroke writing, and the neutral crossover wires are electrically connected to each other. In this way, the three feeding phases of the stator are connected to each other by Y connection. Thereby, the coil man-hours can be shortened and the cost is reduced.

  According to the invention relating to the stator connection method of the rotating electrical machine of aspect 2, the same effect as that of aspect 1 can be obtained.

It is an outline figure of an axial direction section of electric motor M concerning an embodiment. It is the schematic diagram which looked at the stator from the upper part. It is a schematic diagram explaining the connection state of the coil of the stator of a first embodiment. It is a disassembled perspective view of a division | segmentation core unit. FIG. 3 is a development view of the stator that specifically explains the winding procedure of the stator coil according to the first embodiment. It is a schematic diagram explaining the connection state of the coil of the stator of 2nd embodiment. It is a schematic diagram explaining the connection state of the coil of the stator of a third embodiment. It is an expanded view of the stator which demonstrates the winding procedure of the coil of the stator of 3rd embodiment concretely. It is a schematic diagram explaining the connection state of the coil of the stator of 4th embodiment. It is an expanded view of the stator which demonstrates the winding procedure of the coil of the stator of 4th embodiment concretely.

<First embodiment>
(Overview)
Based on FIGS. 1-5, the electric motor M (equivalent to a rotary electric machine) and the stator 1 in 1st embodiment of this invention are demonstrated. In the present embodiment, the electric motor M is a three-phase AC rotating electric machine having three power feeding phases (U phase, V phase, W phase). FIG. 1 is a schematic view of a cross section of the electric motor M cut in the direction of the rotation axis of the rotor R. In the following description, the up and down direction in FIG. 1 is referred to as up and down, but the up and down direction is irrelevant to the direction when the electric motor M is actually disposed, for example, in a vehicle. The use application of the electric motor M is not limited, but can be used as, for example, a shift motor of an automatic transmission used in a vehicle, a drive source of an electric power steering device, and the like.

  FIG. 2 is a cross-sectional view taken along the line 2-2 in FIG. 1 and mainly shows the stator 1. In the following description, “central axis C” refers to the central axis of the annular stator 1 (see FIG. 1). The central axis C of the stator 1 coincides with the rotation axis of the rotor R. In the following description, “axial direction” refers to the direction of the central axis C of the stator 1. In addition, the electric motor M of the present invention is limited to a type in which three power feeding phases (U phase, V phase, W phase) are connected by Y connection. In the stator 1 of the first embodiment, each of the three power supply phases (U phase, V phase, W phase) 6 is provided for each of the power supply phases (corresponding to an even number), and Each type is connected (coupled) in parallel (see FIG. 3).

(Electric motor M)
As shown in FIG. 1, the electric motor M includes a lid member 11, a rotor R, a stator 1, a motor housing H (corresponding to a housing) that rotatably supports the rotor R and fixes the stator 1. It has. The lid member 11 is provided at the upper end of the motor housing H so as to close the opening of the motor housing H, and supports the rotating shaft of the rotor R via a ball bearing. The rotating shaft of the rotor R passes through the center of the lid member 11.

  The rotor R includes a plurality of magnets Mg on the circumference. The outer periphery of the rotor R, that is, the outer periphery of the magnet Mg, is arranged to face the inner periphery of the stator 1 in the radial direction. A rotating magnetic field is generated in the stator 1 by supplying electric power whose phases are shifted to the three feeding phases (U phase, V phase, W phase) of the stator 1, and the rotating magnetic field drives the rotor R. The present embodiment relates to a winding structure of a core (stator core), specifically, a split core, among the components constituting the electric motor M. Therefore, since the components other than this, for example, the configuration of various bearing portions and the fixing method between the respective portions may be arbitrary, illustration and description thereof will be omitted.

(Stator 1)
The stator 1 includes a plurality (six in this embodiment) of divided core units 4 (see FIGS. 2, 3, and 5). As shown in FIG. 2, the six divided core units 4 are equally divided for each in-phase, that is, for each power supply phase (U phase, V phase, W phase). Six divided core units 4 are defined as divided core units 4A to 4F. As described above, each power supply phase (U phase, V phase, W phase) includes two coils 6. Therefore, hereinafter, for convenience of explanation, the U phase of each power feeding phase may be divided into U1 phase and U2 phase. Similarly, the V phase and the W phase may be divided into the V1 phase, the V2 phase, the W1 phase, and the W2 phase.

  In FIG. 2, each of the divided core units 4A to 4F is arranged clockwise. As shown in FIGS. 2 and 5, in the first embodiment, the divided core unit 4 </ b> A is a U1 phase, and has a winding start portion Ls and a winding end portion Le when winding the coil. (See FIG. 5). At this time, the teeth 41b of the split core unit 4A are the winding start teeth 41b and the winding end teeth 41b.

  When the coil wire is wound around each of the divided core units 4A to 4F, when the divided core unit 4A (U1 phase) having the winding start portion Ls is used as a base point, each feeding phase (U1, U2 phase, V1, V2 phase, W1, W2 phase) are arranged in the order of U1 phase → V1 phase → W1 phase → U2 phase. That is, each divided core unit 4A, 4D is a divided core unit for the feeding phase U phase. Further, each divided core unit 4B, 4E is a divided core unit for the feeding phase V phase. Furthermore, each divided core unit 4C, 4F is a divided core unit for the feeding phase W phase. Each of the six divided core units 4 is wound with each coil 6 for each feeding phase (U phase, V phase, W phase) (see FIGS. 2 and 3).

  As shown in FIG. 4, each divided core unit 4 </ b> A to 4 </ b> F includes a divided core 41 and an insulator 42. The split core 41 is formed by laminating a plurality of electromagnetic steel plates. The split core 41 includes a yoke 41a whose outer peripheral surface is formed in an arc Arc shape, and a tooth 41b that is formed to protrude radially inward of the arc Arc of the yoke 41a. The split core 41 includes an inner flange 41c that is connected to the protruding end of the tooth 41b and located at the inner end of the stator 1.

  As described above, the split core 41 has a substantially T-shaped cross section perpendicular to the central axis C. Then, the six divided cores 41 are arranged in an annular shape as shown in FIG. 2 so that the yoke 41a forms an annular shape. The six divided cores 41 arranged in an annular shape correspond to the core of the present invention.

  In order to arrange the yokes 41a in an annular shape, the engaging grooves 41e and the engaging protrusions 41d are integrally formed with the yokes 41a on both sides in the circumferential direction of the yokes 41a. And a predetermined distance. That is, the engaging groove 41e (see the broken line in FIG. 4) is formed on one side surface of the yoke 41a of each divided core 41 facing each other when adjacent in the circumferential direction, and the engaging protrusion 41d (see FIG. 4). 4) is formed. The engagement groove 41e and the engagement protrusion 41d are formed to have a convex R shape and a concave R shape when cut along a cross section orthogonal to the central axis C direction. Accordingly, the six divided cores 41 (divided core units 4A to 4F) arranged in an annular shape can easily maintain an annular state by the engagement between the adjacent engaging protrusions 41d and the engaging groove portions 41e. . Further, even when six divided cores 41 (corresponding to cores) arranged in an annular shape are developed and placed on a plane such as a desk, they can be placed stably.

(Insulator)
As shown in FIG. 4, the insulator 42 is formed in a state of being divided into two in the vertical direction. The insulator 42 is formed of an insulating material such as synthetic resin. The insulator 42 mainly covers the teeth 41b of each divided core 41. Hereinafter, the upper insulator is described as the upper insulator 44 and the lower insulator is described as the lower insulator 45.

  The lower insulator 45 located below includes a lower winding portion 45a that extends in a cylindrical shape in the radial direction so that the coil 6 is wound, and a lower inner flange that is connected radially inward of the lower winding portion 45a. 45b and a lower outer flange 45c connected radially outward of the lower winding portion 45a.

  In the lower insulator 45, the upper end of the lower winding portion 45a is opened. In this state, the lower insulator 45 is inserted into the teeth 41b of the split core 41 from below. In a state where the lower insulator 45 is mounted on the teeth 41b of the split core 41, the lower inner flange 45b contacts the inner flange portion 41c of the split core 41 from the outside in the radial direction. The inner flange 41c protrudes inward in the radial direction from the lower inner flange 45b. Further, with the lower insulator 45 attached to the teeth 41b of the split core 41, the lower outer flange 45c contacts the yoke 41a from the inside in the radial direction. The yoke 41a protrudes outward in the radial direction from the lower outer flange 45c.

  On the other hand, the upper insulator 44 located on the upper side, like the lower insulator 45, has an upper winding portion 44a extending in a cylindrical shape in the radial direction and an upper inner flange connected inward in the radial direction of the upper winding portion 44a. 44b and an upper outer flange 44c connected to the outer side in the radial direction of the upper winding portion 44a. In the upper insulator 44, the lower end of the upper winding portion 44a is opened. In this state, the upper insulator 44 is inserted into the teeth 41b of the split core 41 from above.

  In a state where the upper insulator 44 is mounted on the teeth 41b, the upper inner flange 44b contacts the inner flange portion 41c from the radially outer side. The inner flange 41c protrudes radially inward from the upper inner flange 44b. Further, with the upper insulator 44 mounted on the teeth 41b, the upper outer flange 44c contacts the yoke 41a from the radially inner side. The yoke 41a protrudes outward in the radial direction from the upper outer flange 44c.

  In a state in which the lower insulator 45 and the upper insulator 44 are mounted on the split core 41, the joint between the insulators 44 and 45 is flat, and the coil 6 is attached to the lower winding portion 45a and the upper winding portion 44a. It is wound. Hereinafter, the lower winding portion 45a and the upper winding portion 44a are collectively referred to as a winding portion 48.

(U phase, V phase and W phase connection terminals 46, 47)
As shown in FIG. 4, connection terminals 46 and 47 are provided at the upper end portion of the upper insulator 44 so as to protrude in the axial direction integrally with the upper insulator 44. The connection terminals 46 and 47 are made of a metal conductor such as copper or aluminum. However, the connection terminal 46 may not be a conductor. For example, the connection terminal 46 may be formed integrally with the same resin material as that of the upper insulator 44. In addition, what is necessary is just to set arbitrarily about the shape of the connection terminals 46 and 47 shown in FIG. For this reason, in FIG. 4, although the shape is schematically shown by the rectangular parallelepiped shape, it is not restricted to the shape shown in figure.

  In the first embodiment, all connection terminals 47 correspond to neutral point conduction terminals. A coil wire formed by winding the coil 6 is wound around the connection terminal 47 and welded, so that the coil wire and the connection terminal 47 are electrically connected. Of the connecting wires of the coil wire, the connecting wire connected to the connection terminal 47 when establishing the Y connection of the stator 1 is referred to as a “neutral point connecting wire”. In addition, a crossover means a part of coil wire which connects between each coil 6. FIG. Thereby, in the formation position of the neutral point of each feed phase (U phase, V phase, W phase) in the Y connection, each of the feed phases that are electrically connected to each other and form a neutral point among the connecting wires. Sex point crossover lines are electrically connected to each other. In addition, as a formation method of a neutral point, it is not restricted to the said method, The neutral point crossover wire for each electric power feeding phase (U phase, V phase, W phase) is welded, and it connects directly. Good.

(The winding procedure of the coil 6 around the divided core units 4A to 4F)
The winding procedure of each coil 6 will be described with reference to FIGS. As shown in FIG. 5, each of the coils 6 is wound in a state where the six divided cores 41 to which the respective insulators 42 are attached, that is, the divided core units 4 </ b> A to 4 </ b> F are connected and developed on a plane. Each coil 6 may start to be wound from any of the divided core units 4A to 4F. However, in this embodiment, for example, the coil 6 is wound from the connection terminal 47 (neutral point conduction terminal) of the divided core unit 4A that forms the U1 phase. Start. In addition, even if it is a case where winding starts from other division | segmentation core units 4B-4F, winding shall be started from each connection terminal 47 of division | segmentation core units 4B-4F.

  The order in which the coils 6 are wound is as shown by an arrow Ar1 in FIG. That is, in FIG. 5, each coil 6 is wound in the order of A1 → A21. The process of winding in the order of A1 → A21 is referred to as a continuous winding process. Hereinafter, the coil wires connecting the coils 6 are referred to as “crossover wires”. In addition, as described above, the connecting wire connected to the connection terminal 47 (neutral point conduction terminal) among the connecting wires is particularly referred to as a “neutral point connecting wire”.

(Formation of U phase)
In FIG. 5, in A1, a neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4A (U1 phase). In A2, the coil 6 is wound around the winding portion 48 of the split core unit 4A (U1 phase). In A3, a crossover is wound around the connection terminal 46 of the split core unit 4A (U1 phase). Next, at A4, a jumper wire is wound around the connection terminal 46 of the split core unit 4A (U2 phase). In A5, the coil 6 is wound around the winding portion 48 of the split core unit 4A (U2 phase). In A6, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4D (U2 phase). The U phase is formed by these connections. The connection terminal 47 and the neutral crossover wire, and the connection terminal 46 and the crossover wire are electrically connected by welding after winding. Hereinafter, the same applies to the V phase, the W phase, and the second to fourth embodiments of the first embodiment to be described, but the description thereof is omitted.

(Formation of V phase)
In FIG. 5, at A7, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4B (V1 phase). In A8, the coil 6 is wound around the winding portion 48 of the split core unit 4B (V1 phase), and in A9, the jumper is wound around the connection terminal 46 of the split core unit 4B (V1 phase). In A10, a crossover is wound around the connection terminal 46 of the split core unit 4E (V2 phase). In A11, the coil 6 is wound around the winding portion 48 of the split core unit 4D (V2 phase). In A12, the neutral point is connected to the connection terminal 47 (neutral point conduction terminal) of the split core unit 4D (V2 phase). A crossover is wound. By these connections, a V phase is formed.

(Formation of W phase)
In FIG. 5, in A13, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4C (W1 phase). In A14, the coil 6 is wound around the winding portion 48 of the split core unit 4C (W1 phase), and in A15, the jumper is wound around the connection terminal 46 of the split core unit 4C (W1 phase). In A16, a jumper is wound around the connection terminal 46 of the split core unit 4F (W2 phase). In A17, the coil 6 is wound around the winding portion 48 of the split core unit 4F (W2 phase). In A18, the neutral point is connected to the connection terminal 47 (neutral point conduction terminal) of the split core unit 4F (W2 phase). A crossover is wound. The W phase is formed by these connections.

  Further, in A19, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4C (W1 phase). In A20, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4B (V1 phase). In A21, the neutral point jumper wire is wound around the connection terminal 47 (neutral point conduction terminal) of the split core unit 4A (U1 phase), and the winding is finished.

  The winding start portion Ls and the winding end portion Le may be wound around the connection terminal 47 of the split core unit 4A (U1 phase) for processing. And each input line Lu, Lv, Lw is pulled out from each connection terminal 46 of division | segmentation core unit 4A (U1 phase), division | segmentation core unit 4B (V1 phase), and division | segmentation core unit 4C (W1 phase), and three electric power feeding phases (U phase (U1, U2), V phase (V1, V2), W phase (W1, W2)) are connected by Y connection.

  As described above, in the winding or connection from A1 to A21, at the neutral point formation position (position of each connection terminal 47), each connection terminal 47 (medium To the sex point conduction terminal). That is, each neutral point crossover wire is electrically connected via each connection terminal 47, and each feed phase (U phase (U1, U2), V phase (V1, V2), W phase (W1, W2) ) Are neutralized. In the above, the step of electrically connecting each neutral point crossover wire to each connection terminal 47 which is a neutral point conduction terminal is referred to as a neutral point conduction terminal connection step. The same applies to other embodiments described below. Thus, since the neutral points are connected to each other by the connection terminals 47 (neutral point conduction terminals) that can be formed at low cost, it is not necessary to use expensive bus bars and conduction clips as in the prior art. Is low cost.

<Second embodiment>
In the first embodiment, each of the three coils 6 of the three feeding phases (U phase, V phase, W phase) is provided in two (equivalent to an even number), and each coil 6 is connected (connected) in parallel. ) However, this aspect is not limited. As shown in FIG. 6, as the stator 201 (see FIG. 1) of the second embodiment, three power supply phases (U phase, V phase, W phase) each have four coils 6 (corresponding to an even number). Each of the four coils 6 may be connected (coupled) in parallel.

  In this case, in the first embodiment, each of the U phase, the V phase, and the W phase is wound in the order of (U1 phase → U2 phase) → (V1 phase → V2 phase) → (W1 phase → W2 phase). Wind the coil wire in the following order: (U1 phase → U2 phase → U3 phase → U4 phase) → (V1 phase → V phase 2 → V3 phase → V4 phase) → (W1 phase → W2 phase → W3 phase → W4 phase) Turn it. Also by this, the same effect as the first embodiment can be obtained. In addition, three feeding phases (U-phase, V-phase, W-phase) may include six or more even number of coils 6 and connect (connect) them in parallel. Good.

<Third embodiment>
Next, a third embodiment will be described with reference to FIGS. The stator 301 of the third embodiment is different from the stator 1 of the first embodiment in the arrangement of the coils 6 of the respective feeding phases and the entire teeth 41b from the winding start teeth 41b to the winding end teeth 41b. The difference is that after the winding wire is continuously wound through the connecting wire, the connecting wire unnecessary for Y-connection is cut. Other than the above, the second embodiment is the same as the first embodiment, so only the changes will be described, and the description of the same parts will be omitted.

  In the stator 301 of the third embodiment, as shown in FIG. 7, each of the three feeding phases (U phase (U1, U2), V phase (V1, V2), W phase (W1, W2)) A coil (corresponding to a plurality of coils) is provided, and the two coils are connected in series. At this time, the number of coils provided in each power feeding phase is not limited to two. The number may be one or more than two, and the same effect can be obtained in any case. In this embodiment, the case of two will be described.

(The winding procedure of the coil 6 around the divided core units 4A to 4F)
The winding procedure of each coil 6 of the stator 301 will be described with reference to FIGS. Each coil 6 may start to be wound from any of the divided core units 4A, 4E, and 4F. In the third embodiment, for example, the coil 6 starts to be wound from the connection terminal 46 of the divided core unit 4A that forms the U phase. Therefore, the teeth of the split core unit 4A start to be wound and become teeth. In addition, also when starting to wind from the other divided core units 4E and 4F, the winding starts from the connection terminals 46 of the divided core units 4E and 4F.

  The winding order of each coil 6 is as shown by an arrow Ar2 in FIG. That is, the coil wire is wound in the order of B1 → B18 in FIG. Hereinafter, in B2 to B18, the coil wires connecting the coils 6 are referred to as crossover wires.

(Formation of U phase)
In FIG. 8, at B1, a jumper is wound around the connection terminal 46 of the split core unit 4A (U1 phase). In B2, the coil 6 is wound around the winding portion 48 of the split core unit 4A (U1 phase). In B3, a crossover is wound around the connection terminal 47 of the split core unit 4A (U1 phase). In B3, the connection terminal 47 is not a neutral point conduction terminal (see FIG. 7). Next, in B4, a jumper wire is wound around the connection terminal 46 of the split core unit 4D (U2 phase). In B5, the coil 6 is wound around the winding portion 48 of the split core unit 4D (U2 phase). In B6, a jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4D (U2 phase). At this time, the crossover connected to the connection terminal 47 is a neutral crossover. By these, the U phase is formed.

(Formation of V phase)
In B7, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4E (V1 phase). In B8, the jumper wire is wound around the connection terminal 46 of the split core unit 4B (V2 phase). That is, in B7 → B8, the wiring is jumped over the winding portions 48 of the divided core unit 4E (V1 phase) and the divided core unit 4B (V2 phase). In B9, the coil 6 is wound around the winding portion 48 of the split core unit 4B (V2 phase). In B10, the jumper wire is wound around the connection terminal 47 of the split core unit 4B (V2 phase). At this time, the connection terminal 47 does not form a neutral point.

  In B11, the jumper wire is wound around the connection terminal 46 of the split core unit 4E (V1 phase). In B12, the coil 6 is wound around the winding portion 48 of the split core unit 4E (V1 phase). In B13, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4E (V1 phase). As shown in FIG. 8, B7 and B13 are connected to the same connection terminal 47. As a result, a V phase is formed.

(Formation of W phase)
Further, in B14, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4F (W1 phase). In B15, the coil 6 is wound around the winding portion 48 of the split core unit 4F (W1 phase), and in B16, the jumper is wound around the connection terminal 46 of the split core unit 4F (W1 phase). In B17, a crossover is wound around the connection terminal 47 of the split core unit 4C (W2 phase). The connection terminal 47 at this time does not form a neutral point. In B18, the coil 6 is wound around the winding portion 48 of the split core unit 4C (W2 phase), and in B19, the jumper is wound around the connection terminal 46 of the split core unit 4C (W2 phase). As a result, a W phase is formed.

(Cut off the crossover Ld1)
The divided core unit 4C (W2 phase) is a winding end portion of the coil wire. That is, the teeth 41b of the split core unit 4C are the winding end teeth. As shown in FIGS. 7 and 8, when each power feeding phase (U phase, V phase, W phase) is Y-connected, the connecting wire Ld <b> 1 unnecessary for Y-connection is cut at one point in the middle of the connecting wire. .

  The winding start portion and the winding end portion of the coil wire may be wound and fixed to the connection terminal 46 of the split core unit 4A (U1 phase) and the connection terminal 46 of the split core unit 4C, respectively. Then, the input lines Lu, Lv, and Lw are drawn from the connection terminals 46 of the divided core unit 4A (U1 phase), the divided core unit 4B (V2 phase), and the divided core unit 4C (W2 phase). In the winding from B1 to B19, at each connection terminal 47 position of the split core unit 4D, 4E, 4F, which is a neutral point formation position, the neutral point jumper wire is connected to each connection terminal 47 (neutral point conduction terminal). The neutral points of the power feeding phases (U phase, V phase, W phase) are electrically connected to each other. Thereby, each feed phase (U phase, V phase, W phase) is connected by Y connection.

  In the third embodiment, the number of coils 6 included in each of the three power feeding phases (U phase, V phase, and W phase) has been described as two, but this is not a limitation. Any number of coils 6 may be included in each of the three power feeding phases (U phase, V phase, and W phase). Also by this, the same effect as the third embodiment can be obtained.

<Fourth embodiment>
Next, a fourth embodiment will be described with reference to FIGS. The stator 401 (see FIGS. 1 and 2) of the fourth embodiment has three power supplies with respect to the stator 301 of the third embodiment having only one set of three power supply phases (U phase, V phase, W phase). It has two sets of phases (U phase, V phase, W phase). Moreover, as shown in FIG. 9, the stator 401 of 4th embodiment has each coil 6 which each electric power supply phase of each group has rather than one with respect to the stator 301 of 3rd embodiment. Is different. Except for the above, the third embodiment is the same as the third embodiment, so only the changes will be described and the description of the same parts will be omitted.

(The winding procedure of the coil 6 around the divided core units 4A to 4F)
The winding procedure of each coil 6 of the stator 401 will be described with reference to FIGS. Each coil 6 of the three feeding phases (U-phase, V-phase, W-phase) may start winding from any of the split core units 4A to 4F, but in this embodiment, for example, the U-phase is formed. Winding starts from the connection terminal 46 of the split core unit 4A. In addition, when starting to wind from the other divided core units 4B to 4F, the winding starts from the connection terminals 46 of the divided core units 4B to 4F.

  The order in which the coils 6 are wound is as shown by an arrow Ar3 in FIG. That is, winding is performed in the order of C1 → C20 in FIG. In the following, each line connecting between the coils 6 of the divided core units 4A to 4F among C1 to C20 is referred to as a crossover.

(Formation of U phase (U1 phase))
9 and 10, at C1, a jumper is wound around the connection terminal 46 of the split core unit 4A (U1 phase). In C2, the coil 6 is wound around the winding portion 48 of the split core unit 4A (U1 phase). In C3, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4A (U1 phase).

(Formation of V phase (V1 phase))
In C4, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4B (V1 phase). In C5, a crossover is wound around the connection terminal 46 of the split core unit 4B (V1 phase). In C6, the coil 6 is wound around the winding portion 48 of the split core unit 4B (V1 phase). In C7, the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4B (V1 phase) Sex point crossing wire is wound. C7 shares the connection terminal 47 with C3.

(Formation of W phase (W1 phase))
Next, at C8, the neutral point jumper wire is wound around the connection terminal 47 (corresponding to the neutral point conduction terminal) of the split core unit 4C (W1 phase). In C9, the coil 6 is wound around the winding portion 48 of the split core unit 4C (W1 phase), and in C10, the jumper is wound around the connection terminal 46 of the split core unit 4C (W1 phase).

(Formation of U phase (U2 phase) to W phase (W2 phase))
In C11, a crossover is wound around the connection terminal 46 of the split core unit 4D (U2 phase). C10 → C11 is a crossover for connection from one feeding phase (U1 phase, V1 phase, W1 phase) to another feeding phase (U2, V2, W2 phase) in another system (see FIG. 7). ). Since C11 → C20 is the same as C1 → C10, description thereof is omitted.

  C20 is the winding end portion of the coil wire. C1 is a winding start portion of the coil wire. That is, the teeth 41b of the split core unit 4A are the teeth that start winding. The teeth 41b of the split core unit 4F are the winding end teeth. As shown in FIG. 10, two sets of power feeding phases (U1, V1, W1, and U2, V2, W2) are in an independent state and are in a Y-connection state, which is unnecessary. The crossover lines Ld2, Ld3, and Ld4 are each cut along the way (three places). As a result, the two power feeding phases are independently connected by Y-connection.

  The winding start portion and the winding end portion may be fixed and processed by a predetermined method on the connection terminal 46 of the split core unit 4A (U1 phase) and the connection terminal 46 of the split core unit 4F (W2 phase). And each input line Lu1, Lv1, Lw1, Lu2, Lv2, Lw2 is pulled out from each connection terminal 46 of division | segmentation core unit 4A-4F, The three feed phases (U phase, V phase, W) connected by Y are connected. Two combinations of phase) can be made at low cost.

(Effect of embodiment)
According to the first to fourth embodiments, the yoke 41a formed in an arc shape and the teeth 41b formed on the yoke 41a so as to protrude radially inward of the yoke 41a are provided, and the yoke 41a has an annular shape. Rotating electrical machine M provided with a plurality of divided cores 41 arranged in such a manner and a plurality of coils 6 wound around teeth 41b so as to form three feeding phases (U phase, V phase, W phase). The three feed phases (U phase, V phase, W phase) are connected to each other by Y-connection, and three feed phases (U phase, V phase, W phase). Each of the coils 6 has a single coil wire wound continuously over all the teeth 41b from the winding start teeth 41b to the winding end teeth 41b of the plurality of teeth 41b via the crossover wires. In the winding At the position where the neutral point of each feed phase (U phase, V phase, W phase) in the Y connection is formed, each feed phase (U phase, V) of the crossover wires that conducts each other to form a neutral point Phase, W phase) are connected to each other.

  As a result, in the stators 1, 201, 301, 401, one coil wire is wound in the manner of one-stroke writing from the winding start tooth 41b to the winding end tooth 41b included in the split core unit 4A, and three feeding phases ( The neutral point crossover wires (U-phase, V-phase, W-phase) are electrically connected to each other and connected by Y connection. Therefore, the winding man-hour of the coil 6 can be shortened and the cost is reduced.

  Further, the stators 1, 201, 301, and 401 include a plurality of insulators 42 that are formed of an insulating material and respectively cover the teeth 41b of the plurality of split cores, and the plurality of insulators 42 includes three feeding phases (U phase, (V-phase, W-phase) each coil 6 is wound around a winding portion 48, and each neutral point conduction terminal 47 (connection terminal) provided in the vicinity of each coil 6 and formed of a conductor. In addition, the neutral point crossover wires are electrically connected to each other through the neutral point conduction terminals 47 to be connected. Thereby, the coil wire winding operation is efficiently performed, and the number of man-hours related to the winding operation can be reduced.

  In the first and second embodiments, the three feeding phases (U phase, V phase, and W phase) are each composed of an even number of coils 6 (two in the first embodiment and four in the second embodiment). The even number of coils 6 are connected (coupled) in parallel. Thereby, even if the coil 6 is wound around the stator 1, no unnecessary crossover is generated. Therefore, it is not necessary to cut the jumper line, which is efficient.

  In the stators 301 and 401 of the third and fourth embodiments, of the connecting wires, connecting wires unnecessary for the Y connection are cut. As described above, since the Y connection can be established only by adding an operation for cutting the connecting wire unnecessary for the Y connection, the stators 301 and 401 can be manufactured at a correspondingly low cost.

  In the stator 301 of the third embodiment, each of the three power supply phases (U phase, V phase, W phase) includes two (corresponding to a plurality) coils 6, and the two (plural) coils 6 are Each is connected in series. Thus, even if each power supply phase (U phase, V phase, W phase) has a coil arranged in series, the coil wire is continuously wound around each tooth, and finally it is unnecessary for the Y connection. The Y connection can be established only by cutting the long connecting line. For this reason, a stator can be provided at low cost.

  In the stator 401 of the fourth embodiment, there are two sets of three power supply phases (U phase, V phase, W phase) connected by Y connection, and the connecting wires connecting the two power supply phases are cut off. Two sets of power supply phases are individually supplied with three-phase AC power and can be driven independently. With such a configuration, even if one of the two sets of circuits fails, the minimum function as the motor M can be maintained. Each feeding phase is not limited to two sets. Each feeding phase may be provided in any number exceeding two sets.

  The rotating electrical machine M of the first to fourth embodiments includes a motor housing H (housing), a rotor R that is rotatably attached to the motor housing H, and a stator 1 that is attached to the motor housing H so as to face the rotor R. , 201, 301, 401. Thus, since the inexpensive stator is provided, the rotating electrical machine M is also inexpensive.

  In the connection method of the stators 1, 201, 301, 401 of the first to fourth embodiments, the yoke 41a formed in an arc shape and the teeth 41b formed to protrude from the yoke 41a toward the radially inner side of the yoke 41a. And a plurality of divided cores 41 (corresponding to cores) arranged so that the yoke 41a is annular, and three feeding phases (U phase, V phase, W phase) are wound around the teeth 41b. A plurality of rotated coils 6, and three feed phases (U phase, V phase, W phase) are connected to each other by Y connection, and three feed phases (U phase, V phase, W phase) In each coil 6, one coil wire is continuously wound through a crossover over all the teeth 41b from the winding start teeth 41b to the winding end teeth 41b among the plurality of teeth 41b. Continuous wound At the position where the neutral point of each feed phase (U phase, V phase, W phase) in the Y connection is formed, each feed phase that is electrically connected to each other and forms a neutral point ( The neutral point crossover wires (U phase, V phase, W phase) are electrically connected to each other.

  Thereby, one coil wire is wound in the manner of one-stroke writing from the winding start tooth 41b to the winding end tooth 41b provided in the split core unit 4A, and the three feeding phases (U phase, V phase, W phase) Neutral point crossover lines are electrically connected to each other and connected by Y connection. Therefore, the winding man-hour of the coil 6 can be shortened.

(Other)
Note that, similarly to the stator 401 of the fourth embodiment, the stators 1, 201, 301 of the first to third embodiments may be provided with two or more sets of three feeding phases connected by Y connection. In that case, after winding each coil 6, the connecting wire which connects each independent electric power feeding phases should just be cut | disconnected. This also provides the same effect as the stator 401 of the fourth embodiment.

  Further, in each of the above embodiments, the number of divided core units included in the stators 1, 201, 301, and 401 is six from A to F. However, the present invention is not limited to this, and may be an aspect having only three divided core units. Good. Moreover, it is good also as an aspect which has nine division | segmentation core units exceeding six pieces. These connection methods are the same as in the above embodiment. A corresponding effect can be expected by these. Furthermore, the cores included in the stators 1, 201, 301, and 401 are not limited to the divided core 41 divided into a plurality of pieces, and may be an integrated core. Also by this, the same effect as the above embodiment can be obtained.

  1, 201, 301, 401 ... stator, 4, 4A to 4F ... split core unit, 41 ... split core (core), 41a ... yoke, 41b ... teeth, 42 ... Insulator, 48 ... winding part, 46 ... connection terminal, 47 ... connection terminal (neutral point conduction terminal), 6 ... coil, C ... central axis, H ... housing ( Motor housing), M ... rotating electric machine (electric motor), R ... rotor, U, V, W ... feeding phase.

Claims (8)

A yoke formed in an arc shape, and a plurality of teeth formed on the yoke so as to project inward in the radial direction of the yoke, the yoke having an annular shape;
A plurality of coils wound around the plurality of teeth so as to form three feeding phases;
A stator of a rotating electric machine comprising:
The three feeding phases are connected to each other by Y connection,
In each of the coils of the three feeding phases, one coil wire is continuous through the crossover wires across all the plurality of teeth from the winding start tooth to the winding end tooth of the plurality of teeth. In the winding, in the formation position of the neutral point of each feeding phase in the Y connection in the winding, the feeding phase of each feeding phase that is electrically connected to each other and forms the neutral point among the connecting wires A stator of a rotating electrical machine in which each neutral point crossover wire is electrically connected. A plurality of insulators that are formed of an insulating material and respectively cover the plurality of teeth of the core;
The plurality of insulators include winding portions around which the coils of the three feeding phases are respectively wound, and neutral point conduction terminals formed by conductors,
The stator of a rotating electrical machine according to claim 1, wherein the neutral point crossover wires are electrically connected to each other through the neutral point conduction terminals.   The stator of a rotating electrical machine according to claim 1, wherein each of the three power feeding phases includes a plurality of coils, and the plurality of coils are connected in series.   The stator of the rotary electric machine according to any one of claims 1 to 3, wherein a connecting wire unnecessary for the Y connection is cut among the connecting wires.   3. The stator of a rotating electrical machine according to claim 1, wherein each of the three feeding phases includes an even number of coils, and the even number of coils are connected in parallel.   There are two or more sets of the three power supply phases connected by the Y connection, and the connecting wires connecting the two or more power supply phases are cut, and each of the two or more power supply phases has a three-phase alternating current. The stator for a rotating electrical machine according to any one of claims 1 to 5, wherein electric power is supplied individually and can be driven independently. A housing;
A rotor rotatably attached to the housing;
The stator according to any one of claims 1 to 6, wherein the stator is attached to the housing so as to face the rotor.
Rotating electric machine with A yoke formed in an arc shape, and a plurality of teeth formed on the yoke so as to project inward in the radial direction of the yoke, the yoke having an annular shape;
A plurality of coils wound around the plurality of teeth so as to form three feeding phases;
A method for connecting a stator of a rotating electrical machine comprising:
The three feeding phases are connected to each other by Y connection,
In each of the coils of the three feeding phases, one coil wire is continuous through the crossover wires over all the plurality of teeth from the winding start tooth to the winding end tooth among the plurality of teeth. With a continuous winding process,
At the position where the neutral point of each feeding phase in the Y connection is formed, among the connecting wires, the neutral point connecting wires of the feeding phases that are electrically connected to each other to form the neutral point are electrically connected to each other. A method for connecting a stator of a rotating electrical machine, comprising a step of connecting a neutral point connecting wire connected to the stator.

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