JP2010246353A - Stator and rotating electrical machine using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator which can prevent contact between bridge lines connecting winding wires wound around a teeth portion of a magnetic pole piece and having a large difference in potential, and can be manufactured at low cost, and to provide a rotating electrical machine using the stator. <P>SOLUTION: The rotating electrical machine is configured, in such a way that a plurality of magnetic pole pieces 3 made of a laminate core formed by laminating a thin plate are provided, the magnetic pole pieces 3 each have a back yoke portion 31 and a teeth portion 32 protruding therefrom; an insulating bobbin 7 is fitted to each of the magnetic pole pieces 3; a winding wire 4 is wound around the teeth portion 32 via the insulating bobbin 7; a winding terminal housing groove 76 for housing the terminal portion of the winding wire 4 is provided on the insulating bobbin 7; and a tapered portion 76a gradually inclined from the back yoke portion 31 to the teeth portion 32 is provided on the terminal portion housing groove 76. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a stator having a configuration in which a winding is wound around a tooth portion of a magnetic pole piece via an insulating bobbin, and a rotating electrical machine using the stator.

  Conventionally, in a rotating electrical machine in which a winding is wound around a teeth portion of a stator via an insulating bobbin, for example, the winding is wound around each divided core via an insulator. A structure has been proposed in which a plurality of connecting wires connecting the connecting wires are housed in a connecting wire housing groove provided in an insulator to prevent contact between the connecting wires of each phase having a large potential difference (for example, , See Patent Document 1 below).

  Further, in another conventional technique, winding wires are wound around the split cores via an insulator, and when the split cores are connected to each other, a connecting pin that is drawn from each tooth portion is provided on the insulator. The stator of the motor that prevents the crossover wires of each phase having a large potential difference from contacting each other, and then connects the crossover wires wound around the lead pin to the stator terminal by soldering. Has been proposed (see, for example, Patent Document 2 below).

JP 2000-134844 A JP 2002-209359 A

  However, in the case of the prior art described in Patent Document 1, even if a plurality of connecting wires connecting the windings are securely inserted into the connecting wire storing groove, the lead wire storing groove is parallel to the teeth extending direction. There is a possibility that the crossover will fall out of the crossover storage groove. Thereby, the operation | work which puts the dropped crossover line in a crossover storage groove | channel again increases, and it is difficult to raise productivity.

  Moreover, in the case of the prior art described in Patent Document 2, it is prevented that the connecting wires having a large potential difference come into contact with each other by winding the connecting wire around the drawing pin provided on the insulator, but the connecting wires are drawn from each phase. When connecting the jumper wires, it takes time to connect each of the jumper wires wound around the lead pin and the stator terminal, which deteriorates the line work. Further, since a stator terminal for connection must be added, the product cost becomes high.

  The present invention has been made to solve the above-described problems, and when the winding is wound around the teeth portion of the stator via the insulating bobbin having the terminal portion storing groove on the outer peripheral side of the stator. In addition, it is possible to prevent the connecting wires from falling off from the terminal housing grooves, eliminate contact between connecting wires having a large potential difference, and can be manufactured at low cost without the need for additional parts such as a stator terminal. An object is to provide a stator and a rotating electric machine using the stator.

  The present invention is provided with a plurality of magnetic pole pieces made of laminated iron cores in which thin plates are laminated, and each magnetic pole piece is a stator having a back yoke portion and a teeth portion protruding from the back yoke portion. A winding terminal portion is housed with an insulating bobbin to be fitted, and a winding is wound around the tooth portion through the insulating bobbin, and the end portion of the winding is housed in the insulating bobbin A groove is provided, and a tapered portion that is gradually inclined toward the protruding side of the tooth portion is formed in the terminal portion receiving groove.

  According to the present invention, it is possible to effectively prevent the connecting wire from falling off from the terminal portion storage groove, so that contact between connecting wires having a large potential difference can be eliminated, and the stator terminal is excellent. Therefore, an inexpensive stator and a rotating electric machine using the same can be provided.

In the rotary electric machine in Embodiment 1 of this invention, it is a perspective view of the unit core for comprising a stator. It is sectional drawing of the stator comprised combining the same unit core. It is a connection diagram which shows the connection state in a stator cross section. It is the connection schematic diagram which arranged all the unit cores which comprise a stator linearly, and represented the state of the connection typically. It is a perspective view at the time of seeing the insulation bobbin fitted by each magnetic pole piece of a unit core from the radial direction outer side of a stator. It is a perspective view at the time of seeing the bobbin for insulation from the radial inside of a stator. It is the top view which looked at the bobbin for the insulation from the code A direction of FIG. It is the front view which looked at the bobbin for the insulation from the code B direction of FIG. It is the side view which looked at the bobbin for the insulation from the code C direction of FIG. It is a schematic block diagram of the automatic winding machine used when forming the stator of a rotary electric machine. It is explanatory drawing which shows the state which performed the continuous winding with respect to one set of two unit cores corresponding to one phase part (here V phase) of three-phase alternating current. It is explanatory drawing which shows the state which performed the continuous winding with respect to one set of two unit cores corresponding to 1 phase part (here U phase) of 3 phase alternating current. It is explanatory drawing which shows the modification in the case of connecting between each unit core with a crossover.

Embodiment 1 FIG.
1 is a perspective view of a unit core for constituting a stator in a rotating electric machine according to Embodiment 1 of the present invention, FIG. 2 is a sectional view of a stator configured by combining the unit cores, and FIG. FIG. 4 is a schematic connection diagram schematically showing the connection state by arranging all unit cores constituting the stator in a straight line. In FIG. 4, the unit core is simplified and the windings wound around the tooth portion and the insulating bobbin are omitted.

  The stator 1 of the rotating electrical machine according to the first embodiment includes a plurality (six in this case) of unit cores 2, and the unit cores 2 are arranged in a rotational output axis direction (a direction perpendicular to the paper surface in FIG. 2). A plurality of thin plates are stacked along with a pair of magnetic pole pieces 3 made of a laminated iron core fixed by caulking or welding. Each pole piece 3 has a back yoke portion 31 and a teeth portion 32 protruding from the back yoke portion 31, and each back yoke portion 31 is provided with an iron core holding jig 8 described later when the stator 1 is manufactured. A mounting hole 34 for mounting the unit core 2 is formed, and the back yoke portions 31 adjacent to each other are connected to each other via a thin wall 33 so as to be bendable.

  Here, the thin wall 33 for connecting the magnetic pole pieces 3 to each other is formed by making a part of the back yoke portion 31 thin. However, the present invention is not limited to this, and the back yoke portions 31 of the magnetic pole pieces 3 are connected to each other. It is also possible to have a structure in which a rotatable connecting portion is hinged to be able to swing and connected so as to be able to be bent, for example, a shape that can be rotated using caulking unevenness in the stacking direction.

  In addition, a pair of insulating bobbins 7 to be described later are fitted to the tooth portions 32 of each unit core 2 from the front and rear in the rotation output axis direction, and two unit cores 2 to which the insulating bobbins 7 are fitted are attached. The winding 4 is continuously provided as one set. Thereby, one set of two unit cores 2 corresponds to one phase of each of the phases U, V, and W of the three-phase alternating current.

  The two wound unit cores 2 are arranged opposite to each other at a point-symmetrical position sandwiching the center O of the circle, and three sets of unit cores 2 are used along the circumferential direction. The butt end portions of the back yoke portions 31 of the unit cores 2 thus arranged in an annular shape are integrally connected by welding or adhesion, so that each of the 10 poles and 12 teeth is disposed. A stator 1 for a three-phase DC brushless motor is configured.

  2 to 4, the symbols U, V, W attached to the magnetic pole pieces 3 of the unit cores 2 correspond to the phases of the three-phase alternating current, and N is a neutral point. It is. The subscripts for the phases U, V, and W are shown to distinguish the windings 4 wound around the magnetic pole pieces 3 of the respective unit cores 2. The difference between U1 and U1 ' Indicates that the direction is opposite. For example, in FIG. 3, when viewed from the back yoke portion 31 side, U1 is counterclockwise and U1 'is clockwise. The difference between U1 and U2 indicates that U1 is a winding wound around No. 1 of the unit core 2, and U2 is a winding wound around No. 2 of the unit core 2.

  In the first embodiment, as shown in FIG. 4, when the winding 4 is continuously performed in the same phase, a set of two unit cores 2 is provided for each of the U, V, and W phases. As one unit, the winding 4 may be continuously wound via the connecting wire 44 connecting the pole pieces 3 connected to each other in the unit or the connecting wire 41 connecting the two unit cores 2. As in the above-mentioned Patent Document 2, the number of connection of the winding terminal part by soldering or the like can be reduced, and the inexpensive stator 1 of the rotating electrical machine can be obtained.

  5 is a perspective view when the insulating bobbin 7 is viewed from the radially outer side of the stator, FIG. 6 is a perspective view when the insulating bobbin 7 is viewed from the radially inner side of the stator, and FIG. FIG. 8 is a plan view of the insulating bobbin as viewed from the direction indicated by A in FIG. 5, FIG. 8 is a front view of the insulating bobbin as viewed from the direction of B in FIG. 5, and FIG. It is the side view seen from.

  The insulating bobbin 7 has a tooth fitting portion 71 fitted to the tooth portion 32 of each magnetic pole piece 3 and a back yoke fitting portion 72 fitted to the back yoke portion 31.

  The teeth fitting portion 71 is formed with a winding alignment groove 74 for winding the winding 4 in alignment with the teeth portion 32, and the boundary between the teeth fitting portion 71 and the back yoke fitting portion 72. In the portion, in order to prevent the winding start portion of the winding 4 from interfering with the portion wound thereafter, the winding start line relief groove for letting the winding start portion of the winding 4 to the outside at the left and right positions thereof. 75 is formed. Further, the back yoke fitting portion 72 includes a winding start portion and a winding end portion of the winding 4 of each phase on the left and right sides, and the above-described connecting wires 41 and 44 (hereinafter collectively referred to as a winding terminal portion). A winding terminal portion storing groove 76 for storing the winding terminal portion, and for inserting a string, a binding band or the like to hold the winding terminal portion stored in the winding terminal portion storing groove 76 Winding fixing hole 77 is formed.

  And the winding terminal part accommodation groove | channel 76 formed in said back yoke fitting part 72 is a taper part which inclined gradually toward the protrusion side of the teeth part 32 of the pole piece 3, as FIG. 9 shows. 76a is formed, and the bottom portion 76b of the winding terminal portion accommodation groove 76 is formed in an arc shape that substantially matches the outer diameter of the winding terminal portion in order to prevent the jumper wire from coming loose. .

  FIG. 10 is a schematic configuration diagram of an automatic winding machine used when forming the stator 1 of the rotating electrical machine having the above configuration.

  This automatic winding machine has an iron core holding jig 8 for fixing the unit core 2 and a flyer 9. Here, the iron core holding jig 8 has a disk shape, and is provided with mounting pins 81 to be inserted into the mounting holes 34 formed in the magnetic pole pieces 3 along the circumferential direction thereof. Rotation is possible around the center O. The flyer 9 is for winding the winding 4 around the teeth portion 32 of each pole piece 3 of the unit core 2, and the arm portion 92 attached to the shaft end of the swiveling shaft 91 around the swiveling shaft 91. Is provided so as to be able to turn in the forward and reverse directions as indicated by an arrow θ, and in order to perform aligned winding, the turning shaft 91 is configured to slide in the axial direction (reference Z direction) in synchronization with the turning operation. Yes. The supplied winding 4 is connected from the proximal end side of the arm portion 92 of the flyer 9 to the distal end portion through the inside of the arm portion 92.

  FIG. 11 is an explanatory diagram showing a state in which the winding 4 is continuously applied to one set of two unit cores 2 corresponding to one phase of three-phase alternating current (here, V phase as an example). It is explanatory drawing which shows the state which provided the coil | winding 4 continuously with respect to 2 units | sets of the unit core 2 corresponding to the remaining 2 phases (here U phase is an example) of phase alternating current, and each teeth part 32 The portion of the winding 4 wound around is omitted. In the case of the U phase and the W phase, the direction in which the winding 4 is applied and the positions of the winding start portion and the winding end portion are opposite to those in the V phase. Contrary to the case shown in the figure, a rotating electrical machine having 10 poles and 12 teeth can also be configured by setting FIG. 11 to the U phase, the W phase, and FIG. 12 to the V phase.

  Next, in order to form a stator with reference to FIG. 10 and FIG. 11, the winding 4 is attached to each tooth portion 32 of a set of two unit cores 2 constituting one phase (here, V phase). The method of applying will be described. In the description here, the unit cores and their pole pieces are individually labeled with each other so that they can be distinguished for convenience.

  First, for each of the two unit cores 2a and 2b, the thin portion 33 is bent and reversely bent so that the teeth portion 32 is located outside, and the distance between the adjacent magnetic pole pieces 3a and 3b is increased, and the iron core is held in this state. The mounting holes 81 formed in the back yoke portions 31 of the magnetic pole pieces 3a, 3b, 3c, 3d are fixed to the mounting pins 81 of the jig 8 by, for example, inserting them. At this time, the unit cores 2 a and 2 b are arranged so as to be in a substantially point-symmetrical position across the center O of the iron core holding jig 8. Then, the iron core holding jig 8 is rotated to first move one magnetic pole piece 3 a to the front position of the flyer 9.

  Next, after fixing the terminal portion of the winding 4 protruding from the tip of the arm portion 92 of the flyer 9 to the winding starting wire fixing pin 82 or the like installed in the iron core holding jig 8, the winding 4 is wound. The flyer 9 is turned along the start line escape groove 75 (here, turning rightward as viewed from the back yoke portion 31 side), and the turning shaft 91 is moved along the axial direction (Z direction) in synchronization therewith. Then, the winding 4 is applied to the teeth portion 32 of the magnetic pole piece 3a.

  In this way, by passing the winding start portion of the winding 4 through the winding start line escape groove 75 in advance, the winding start portion of the winding 4 can be released to the outside of the teeth portion 32, and thereafter the teeth portion 32. Therefore, it is possible to avoid interference with a portion wound around the winding 4 and to ensure high alignment of the winding 4.

  Further, during this winding work, the other magnetic pole piece 3b that is not subjected to the work of applying the winding 4 among the pair of magnetic pole pieces 3a, 3b constituting the single unit core 2a is always the turning tip of the flyer 9. Winding work is performed by setting the arrangement position of the unit core 2a so as to be located on the outer side of the rotation surface Q (the position indicated by reference numeral P1 in FIG. 10). In this way, when the winding 4 is applied to one of the magnetic pole pieces 3a in the unit core 2a, it is possible to reliably avoid the flyer 9 from interfering with the other magnetic pole piece 3b connected thereto. Is good. Further, of the pair of magnetic pole pieces 3a and 3b constituting one unit core 2a, the position opposite to the other magnetic pole piece 3b that is not subjected to the work of applying the winding 4 (the place indicated by P2 in FIG. 10). ) To slide the flyer 9 in the Z direction. This is convenient because the flyer 9 can be surely avoided from interfering with the other magnetic pole piece 3b even when the winding 4 needs to be moved a long distance.

  Next, the iron core holding jig 8 is rotated, and the other magnetic pole piece 3b is moved to the front position of the flyer 9 (the position where the magnetic pole piece 3a in FIG. At this time, the winding end portion storing groove 76 of the insulating bobbin 7 is used as the connecting wire 44 without cutting the winding end portion of the winding 4 wound around the one magnetic pole piece 3a constituting the unit core 2a. Of the other magnetic pole piece 3b and then seated on the bottom 76b, and then along the winding start relief groove 75 of the insulating bobbin 7 of the other magnetic pole piece 3b. The winding 4 is applied to the teeth portion 32 in the direction opposite to the direction wound around the one magnetic pole piece 3a (in this example, counterclockwise when viewed from the back yoke portion 31 side).

  As described above, when the connecting wire 44 connecting the adjacent magnetic pole pieces 3a and 3b in the unit core 3 is stored along the taper portion 76a of the winding terminal portion storing groove 76 and is seated on the bottom 76b, The storage of the wire 44 is facilitated, and after storage, the crossover wire 44 can be prevented from unexpectedly falling out of the winding terminal portion storage groove 76, and contact with the crossover wire of another phase having a high potential difference is avoided. Can be convenient. In the other magnetic pole piece 3b, the winding start portion of the winding 4 can be passed outside the teeth portion 32 by passing the winding start portion of the winding 4 through the winding start line escape groove 75. Thereafter, it is possible to avoid interference with a portion wound around the tooth portion 32, and high alignment can be ensured in the winding 4.

  Furthermore, in this winding work, one of the magnetic pole pieces 3a that is not subjected to the work of applying the winding 4 is always outside the rotation surface Q at the turning tip of the flyer 9 (location indicated by P2 in FIG. 10). By performing the winding operation by setting the arrangement position of the unit core 2a so as to be located at the position, it is possible to reliably avoid the flyer 9 from interfering with one of the magnetic pole pieces 3a connected thereto. Further, of the pair of magnetic pole pieces 3a and 3b constituting one unit core 2a, the position opposite to the other magnetic pole piece 3a not subjected to the work of applying the winding 4 (the place indicated by reference numeral P1 in FIG. 10). ) To slide the flyer 9 in the Z direction. This is convenient because it is possible to reliably avoid the flyer 9 from interfering with the other pole piece 3a even when the winding 4 needs to be moved a long distance.

  Next, the iron core holding jig 8 is rotated, and the magnetic pole piece 3c is moved to the front position of the flyer 9 (the position where the magnetic pole piece 3a in FIG. At this time, without winding the winding end portion of the winding 4 wound around the other magnetic pole piece 3b, it is housed along the taper portion 76a of the winding terminal housing groove 76 of the insulating bobbin 7 and is seated on the bottom 76b. Then, after securing a predetermined length enough to reach the other unit core 2b as the crossover wire 41, the winding 4 is wound around one magnetic pole piece 3c constituting the other unit core 2b. After being along the escape groove 75, the winding 4 is applied in the same direction as the magnetic pole piece 3b (counterclockwise when viewed from the back yoke portion 31 side).

  Thus, also for this magnetic pole piece 3c, by passing the winding start portion of the winding 4 through the winding start line escape groove 75, the winding start portion of the winding 4 can be released to the outside of the teeth portion 32. Thereafter, it is possible to avoid interference with a portion wound around the tooth portion 32, and high alignment can be ensured in the winding 4.

  Further, during the winding work, the other magnetic pole piece 3d that is not subjected to the work of applying the winding 4 is always on the outer side of the rotation surface Q at the turning tip of the flyer 9 (indicated by reference numeral P3 in FIG. 10). By performing the winding work by setting the arrangement position of the unit core 2b so as to be positioned, it is possible to reliably avoid the flyer 9 from interfering with the other magnetic pole piece 3d connected thereto. Further, of the pair of magnetic pole pieces 3c and 3d constituting one unit core 2b, the position opposite to the other magnetic pole piece 3d that is not subjected to the operation of applying the winding 4 (the place indicated by P4 in FIG. 10). ) To slide the flyer 9 in the Z direction. This is convenient because it is possible to reliably avoid the flyer 9 from interfering with the other magnetic pole piece 3d even when the winding 4 needs to be moved a long distance.

  Finally, the iron core holding jig 8 is rotated, and the other magnetic pole piece 3d is moved to the front position of the flyer 9 (the position where the magnetic pole piece 3a in FIG. At this time, the winding end portion 44 of the winding 4 wound around one of the magnetic pole pieces 3c constituting the unit core 2b is not cut, and the taper portion 76a of the winding terminal portion receiving groove 76 of the insulating bobbin 7 is not cut. After being housed along and seated on the bottom portion 76b, this is used as a connecting wire 44 through the winding terminal portion housing groove 76 of the insulating bobbin 7 and the winding start line of the insulating bobbin 7 of the other magnetic pole piece 3d. Along with the escape groove 75, the direction opposite to the direction wound around one of the magnetic pole pieces 3c with respect to the teeth part 32 of the other magnetic pole piece 3d (in this example, the left and right directions as viewed from the back yoke part 31 side) ) Is provided with winding 4.

  As described above, when the connecting wire 44 connecting the adjacent magnetic pole pieces 3c and 3d in the unit core 3 is stored along the tapered portion 76a of the winding terminal portion storing groove 76 and is seated on the bottom portion 76b, the connecting wire 44 can be easily stored, and after storage, the crossover wire 44 can be prevented from unexpectedly falling out of the winding terminal portion storage groove 76, and contact with crossover wires of other phases having a high potential difference can be avoided. Convenient because it can. Also, in this other magnetic pole piece 3d, since the winding start portion of the winding 4 is passed through the winding start line escape groove 75, the winding start portion of the winding 4 can be released to the outside of the teeth portion 32. Thereafter, it is possible to avoid interference with a portion wound around the tooth portion 32, and high alignment can be ensured in the winding 4.

  Furthermore, at that time, one of the magnetic pole pieces 3c not subjected to the operation of applying the winding 4 is always positioned outside the rotating surface Q at the turning tip of the flyer 9 (a place indicated by reference numeral P4 in FIG. 10). By performing the winding operation by setting the arrangement position of the unit core 2b, it is possible to reliably avoid the flyer 9 from interfering with one of the magnetic pole pieces 3c connected thereto. In addition, of the pair of magnetic pole pieces 3c and 3d constituting one unit core 2b, the position opposite to the other magnetic pole piece 3c that is not subjected to the work of applying the winding 4 (the place indicated by P3 in FIG. 10). ) To slide the flyer 9 in the Z direction. This is convenient because it is possible to surely prevent the flyer 9 from interfering with the other magnetic pole piece 3c even when it is necessary to move the winding for a long distance.

  Thus, after the winding 4 is applied to the teeth 32 of each of the magnetic pole pieces 3a, 3b, 3c, 3d of the set of two unit cores 2a, 2b, the unit cores 2a, 2b are fixed to the iron core holding jig. 8 and removing the teeth portion 32 from the reverse warped state so that both of them are arcuate as shown in FIG. 11, the two unit cores 2a and 2b corresponding to the V phase The winding 4 is applied continuously.

  In the same manner, the winding 4 is also applied to a set of two unit cores 2 corresponding to the U phase and the W phase, and three sets of these two unit cores 2 are used. As shown in FIG. 2, the set is shifted by 60 degrees sequentially along the circumferential direction to form an annular shape. And it integrates by joining the mutually adjacent end surfaces of each unit core 2 by welding, adhesion, etc. Subsequently, connection processing is performed so that the connection state shown in FIGS. 3 and 4 is obtained, and the winding terminal portion is stored in the winding terminal storage groove 76 (not shown), and a string, a binding band, or the like Is inserted into the winding fixing hole 77 to fix the winding terminal portion. Thus, a stator for a three-phase DC brushless motor having 10 poles and 12 teeth is configured.

  In this way, the first winding start portion and the last winding end portion of the winding 4 are also stored along the taper portion 76a of the winding terminal portion storing groove 76 and seated on the bottom portion 76b. It is convenient because it can be prevented from unexpectedly falling out from the terminal portion storage groove 76 and contact with the winding start portion of the other phase having a high potential difference or the final winding end portion can be avoided.

  In the example shown in FIG. 12, the connecting wire 41 connecting the two unit cores 2a and 2b is set along the outer periphery of the stator 1, but all the units are connected. There is no particular restriction on how to route the cores 2 so long as they can avoid interfering with the unit cores 2 in the process of joining the cores 2 in an annular shape. The unit core 2 can be positioned on the radially inner side or on the radially outer side.

  For example, as shown in FIG. 13, when the crossover wires 41 are arranged in the inner diameter direction of the unit core 2, the crossover wires 41 interfere with each unit core 2 when all the unit cores 2 are connected in an annular shape. This is convenient because the length of the connecting wire 41 can be shortened as compared with the case where the length of the connecting wire 41 is secured in the outer diameter direction of the unit core 2.

  As described above, in the rotating electrical machine according to the first embodiment, for example, when serial star connection is performed with 10 poles and 12 teeth, as shown in FIG. 4, the connecting wire 41 is connected between the two unit cores 2. Since the winding 4 for one phase can be obtained by continuously winding without cutting through, it is possible to reduce the number of times of connection of the winding terminal compared to the conventional, and an inexpensive stator of a rotating electrical machine Obtainable.

  In addition, a taper portion 76a that is gradually inclined toward the teeth portion 32 side is formed in the terminal portion storage groove 76 of the insulating bobbin 7, and a bottom portion 76b having a shape substantially matching the outer diameter of the winding 4 is formed. Therefore, the workability in storing the crossover wires 41 and 44 and the neutral point in the terminal portion storage groove 76 is good, and the crossover wires 41 and 44 and the neutral point are stored in the terminal portion storage groove 76. Once seated, it is possible to reliably prevent the crossover wires 41 and 44 and the neutral point from falling off from the terminal portion storage groove 76, thereby improving productivity. In addition, it is possible to provide a stator of a rotating electric machine that eliminates contact between crossover wires having a large potential difference and is excellent in quality. Furthermore, since it is not necessary to add another component such as a stator terminal, an inexpensive stator for a rotating electrical machine can be provided.

  Further, by providing the winding start wire escape groove 75 on the insulating bobbin 7, interference between the winding start portion of the winding 4 and the portion wound thereafter can be avoided, and by providing this on the left and right In any case where the counterclockwise and clockwise windings 4 are applied, winding with high alignment can be performed.

  Further, since the insulating bobbin 7 is provided with the winding fixing hole 77 for fixing the terminal portion of the winding 4, it becomes easier to fix the terminal portion of the winding 4 and the neutral point N, and between each phase having a large potential difference. Can be avoided and insulation failure can be suppressed.

  In the first embodiment, the case where the winding is continuously applied to the set of two unit cores 2 has been described. However, the present invention is not limited to such a configuration. For example, in the case where winding is individually performed on the unit core 2 composed of a pair of magnetic pole pieces 3, or in the case where the magnetic pole pieces 3 are individually separated, the winding is individually applied to each magnetic pole piece 3. In addition, the present invention can also be applied to a case where winding is continuously performed over each magnetic pole piece 3 in a case where a large number of the magnetic pole pieces 3 are continuously formed in an annular shape.

1 Stator, 2 Unit core, 3 Magnetic pole piece, 31 Back yoke part,
32 teeth, 4 windings, 41, 44 crossover, 7 bobbin for insulation,
75 winding start line relief groove, 76 winding end portion storage groove, 76a taper portion, 76b bottom portion,
77 Winding fixing hole.

Claims (5)

In a stator having a plurality of magnetic pole pieces composed of laminated iron cores laminated with thin plates, each magnetic pole piece having a back yoke portion and a teeth portion protruding from the back yoke portion,
An insulating bobbin fitted to the magnetic pole piece is provided, and a winding is wound around the tooth portion via the insulating bobbin, and the insulating bobbin receives a winding portion for accommodating a terminal portion of the winding. A stator having a line end portion storing groove, and a tapered portion that is gradually inclined toward the protruding side of the tooth portion. 2. The stator according to claim 1, wherein a bottom portion of the terminal portion storage groove is formed in an arc shape substantially matching an outer diameter of a terminal portion of the winding. The stator according to claim 1 or 2, wherein a winding fixing hole for fixing a terminal portion of the winding is formed in the insulating bobbin. The insulating bobbin is provided with a winding start line relief groove at a right and left position in a direction perpendicular to the protruding direction of the teeth portion, which positions the winding start portion of the winding outside the winding position around the teeth portion. The stator according to any one of claims 1 to 3, wherein the stator is provided. 5. A rotating electrical machine comprising the stator according to claim 1, wherein the back yoke portions of a pair of magnetic pole pieces adjacent to each other are connected via a rotatable connecting portion. The rotation is characterized in that the two windings of the unit cores are continuously provided as a set, and the windings are continuously applied, and three sets of the unit cores of the two sets are arranged in an annular shape. Electric.

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