JP2008182868A - Stator structure for rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator structure for rotary electric machine, in which necessary insulation with a stator core is secured at the time of processing work of a crossover, work is easy, processing is performed by a winding machine using a conventional nozzle, and a new device is not required. <P>SOLUTION: In the stator structure for rotary electric machine, a crossover guide part 45 restraining movement of the crossover 6 with respect to a radial direction of the stator cover 4 is arranged near a yoke-side of magnetic pole part cover parts 41a and 42a of the stator cover 4 covering an outer face of a magnetic pole part 3. A flange wall face 46 projected to an axial direction is disposed on an outer peripheral side of the magnetic pole part cover parts 41a and 42a of the stator cover 4. A gap α through which the crossover 6 of the winding 5 passes is disposed between the flange wall face 46 and the crossover guide part 45. The crossover 6 from the magnetic pole part cover parts 41a and 42a of the winding 5 wound to the magnetic pole part cover parts 41a and 42a to the adjacent magnetic pole part cover parts 41a and 42a, is inserted between the crossover guide part 45 and the flange wall face 46 of the stator cover 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for a rotating electrical machine in which a winding is wound directly on a magnetic pole of a stator core using a nozzle, and more specifically, a fixing for a rotating electrical machine with an improved processing method for winding connecting wires Concerning child structure.

There are roughly the following two methods for winding a winding around a magnetic pole of a stator core of a rotating electric machine.
One is a method in which a winding is made in advance and inserted through a gap between magnetic poles. This method is often used for induction machines.
The other is a method in which a winding is directly wound around a magnetic pole of a stator core using a nozzle. This method is generally called a direct winding method. This method is often used for brushless motors and the like.

One problem that often arises with direct winding is the crossover method. A crossover is a line that connects windings wound around a plurality of magnetic poles.
What is important in the processing of the crossover is to ensure necessary insulation and not to complicate the work.

As a prior art, for example, there is Patent Document 1 (Japanese Patent Laid-Open No. 7-46782).
In patent document 1, the crossover holding structure part which fixes a crossover to the edge part of a slot insulator (stator cover) is integrally provided. In this crossover holding structure, a step is provided in the passage through which the crossover passes, and the crossover is placed on this step so that the crossovers do not contact each other. In addition, a structure has been proposed in which a groove is provided in place of the step and a crossover is held in the groove.
However, the structure of Patent Document 1 has a problem that the crossover line is likely to deviate from the step due to vibration or the like.
Further, even when a groove is used instead of a step, when the wire diameter of the winding conductor is increased, the spring property of the winding conductor becomes strong, and a problem that a simple winding conductor comes out of the groove occurs.

In order to solve these problems, Patent Document 2 (Japanese Patent Laid-Open No. 2002-281708) has been proposed.
In patent document 2, since the opening width dimension of the winding conductor fitting groove | channel of an insulator is smaller than the diameter dimension of a winding conductor, there exists an effect that a conductor is hard to remove | deviate from a groove | channel.
In addition, as the plurality of winding conductor fitting grooves are closer to the stator core, the bottom portion is formed to be positioned radially outward, and the closer to the stator core, the opening is opened radially outward. Is positioned so as to be located radially outward. For this reason, when the winding conductor is fitted into the winding conductor fitting groove, at least one wall portion located on both sides of the adjacent opening portion is easily bent. Also, there is an effect that it does not cause difficulty in fitting a large-diameter connecting wire.
JP 7-46782 A JP 2002-281708 A

  However, in the method of Patent Document 2, the operation of fitting the jumper wire into the winding conductor fitting groove is complicated and must be done manually. It is not impossible to automate by machine, but to that end, a dedicated device must be prepared.

  The present invention solves the above-described problems, ensures the necessary insulation from the stator core during the crossover processing work, and is easy to work and can be processed by a conventional winding machine using a nozzle. It aims at providing the stator structure for rotary electric machines which does not require an apparatus.

In order to solve the above-described problems, the present invention provides a stator core in which a plurality of magnetic pole portions are radially arranged at regular intervals along the circumferential direction on the inner peripheral side of an annular yoke, and the stator core Fixing for a rotating electrical machine comprising: a stator cover that covers at least the outer surface of each magnetic pole portion around which the winding is wound, insulated from the outside; and a winding wound around each magnetic pole portion covered with the stator cover In the child structure, provided in the vicinity of the yoke side of the magnetic pole part cover part of the stator cover covering the outer surface of the magnetic pole part, a crossover guide part for locking the movement of the crossover wire in the radial direction of the stator cover, A flange wall surface projecting in the axial direction is provided on the outer peripheral side of the magnetic pole portion cover portion of the stator cover, and a gap is provided between the flange wall surface and the crossover guide portion for passing the crossover wire of the winding. Cover part Certain crossover wire over the pole cover portion adjacent from the pole cover portion of the windings which are wound in that inserted between the flange wall of the stator cover and the connecting wire guide portion.
Further, according to the present invention, the connecting wire that sequentially crosses the magnetic pole part cover parts adjacent to each other of the stator cover along the circumferential direction is connected to the magnetic pole part cover parts on one side and the other side in the axial direction of the stator cover. In other words, the connecting wire guide portion and the outer peripheral flange wall surface of the stator cover are inserted through the outer side of the stator cover alternately.
Furthermore, the present invention lies in that the crossover guide portion is configured by forming a protrusion on an end surface and / or a side surface of the end portion on the yoke side of the magnetic pole portion cover portion of the stator cover.
Still further, the protrusion is formed in the entire region or a part of the end surface and / or side surface of the end portion on the yoke side of the magnetic pole portion cover portion.
Further, in the present invention, a concave groove is formed on an end surface and / or a side surface of the yoke-side end portion of the magnetic pole portion cover portion of the stator cover, and the crossover guide portion is configured by the concave groove inner wall surface. There is.

By configuring as described above, the present invention has the following effects in the winding of the stator for a rotating electrical machine.
In Claim 1, provided in the vicinity of the yoke side of the magnetic pole part cover part of the stator cover covering the outer surface of the magnetic pole part, a crossover guide part for locking the movement of the crossover wire in the radial direction of the stator cover, A flange wall surface projecting in the axial direction is provided on the outer peripheral side of the magnetic pole portion cover portion of the stator cover, and a gap is provided between the flange wall surface and the crossover guide portion for passing the crossover wire of the winding. Since the connecting wire extending from the magnetic pole part cover part of the winding wound around the part cover part to the adjacent magnetic pole part cover part is inserted between the connecting wire guide part and the flange wall surface of the stator cover, The crossover line can be processed by the machine. Therefore, due to the complexity of the work, it has become possible to perform the crossover processing, which has conventionally relied on manual labor or required a dedicated device, only by the conventional winding machine. Moreover, since the crossover wire passes the winding part in which the insulation distance from the housing such as the motor case is already secured, it is not necessary to secure the insulation distance of the crossover alone. Therefore, the motor can be made more compact. Since no additional insulating parts are required, the cost can be reduced.
3. The crossover wire that sequentially crosses the magnetic pole portion cover portions adjacent to each other of the stator cover in a circumferential direction is connected to the magnetic pole portion cover portions on one side and the other side in the axial direction of the stator cover. Since the connecting wire guide portion and the outer peripheral flange wall surface of the stator cover are inserted so as to pass through the outside alternately, the connecting wire is disposed on the outer diameter side of the stator cover. There is no possibility that the connecting wire is shifted to the center side of the stator cover and hinders the operation of the winding nozzle. Therefore, there is no possibility that the winding is disconnected by the winding nozzle.
In Claim 3, since the projection part was formed in the end surface and / or side surface of the yoke side end part of the magnetic pole part cover part of the stator cover to constitute the crossover guide part, it does not interfere with the winding, A crossover can be held.
In Claim 4, since the said protrusion part was formed in the whole region or a part in the end surface and / or side surface of the edge part by the side of the yoke of the said magnetic pole part cover part, it protrudes in both the end surface and side surface of a magnetic pole part cover part. By providing the portion, it is possible to make the connecting wire easier to insert and less likely to come off.
In Claim 5, since the concave groove was formed in the end surface and / or side surface of the yoke side end of the magnetic pole portion cover portion of the stator cover, and the crossover guide portion was constituted by the inner surface of the concave groove. The crossover wire can be held without interfering with the winding.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes a stator core (stator core), and a plurality of magnetic pole portions 3 called pole teeth are radially arranged on the inner peripheral side of the annular yoke 2 at regular intervals along the circumferential direction. It is a thing. Reference numeral 4 denotes a stator cover (also referred to as an insulator) integrally formed of an insulating material such as a synthetic resin. The stator cover 4 has U-shaped magnetic pole part cover parts 41a and 42a that are combined to face each other. It consists of a pair of cover main bodies 41, 42 formed radially on the inner peripheral side of the cylindrical bodies 41b, 42b. The magnetic pole part cover parts 41a and 42a have an opening 43 on the inner diameter side, and a stopper flange part 44 protruding in the axial direction of the stator cover 4 is formed along the peripheral edge on the radial center side. Has been. The stopper flange portion 44 is intended to prevent the winding 5 wound around the outside of the magnetic pole portion cover portions 41a and 42a from coming off. Further, as shown in FIG. 2, the magnetic pole portion cover portions 41 a and 42 a have guide flange portions 45 that serve as crossover guide portions of the crossover wires 6 toward the axial direction of the stator cover 4 on the outer peripheral side in the radial direction. The cover main bodies 41 and 42 protrude from the wall surface 46 with a certain gap α. The guide flange portion 45 supports the crossover wire 6 by providing a constant gap α between the cover bodies 41 and 42 and the wall surfaces 46 of the cylindrical bodies 41b and 42b protruding in the axial direction on the outer peripheral side. The movement of the connecting wire 6 in the radial direction is locked. The guide flange 45 is formed on the outer surface of the magnetic pole part cover portions 41a and 42a of the stator cover 4 that covers the outer surface of the magnetic pole part 3 positioned on the axial end surface of the stator core 1 near the yoke 2 side. 4 projecting in the axial direction.

The connecting wire 6 is a lead wire extending from the magnetic pole part cover parts 41a, 42a of the winding 5 wound around the magnetic pole part cover parts 41a, 42a to the adjacent magnetic pole part cover parts 41a, 42a, and between the windings 5 Is connected. The connecting wire 6 is wound around one magnetic pole part cover part 41a, 42a and then crosses the magnetic pole part cover parts 41a, 42a adjacent to each other along the circumferential direction. Passing alternately through one side and the other side of the direction, the gap α between the guide flange 45 and the wall surface 46 of the cylindrical body 41b, 42b is located at the position of the magnetic pole cover 41a, 42a. It is inserted. This gap α is set to a diameter that is substantially the same as the diameter of the connecting wire 6.
FIG. 3 is a cross-sectional view taken along line AA in FIG. Of the cross-sections of the conductor, only one at the bottom right is a crossover, and the others are all windings. The position of the crossover 6 is fixed by the guide flange 45.

Next, a method for winding the connecting wire 6 fed from the winding nozzle 7a using the winding machine 7 shown in FIGS. 4 and 5 will be described.
The winding machine 7 is arranged at the center of the stator core 1, and the crossover wire 6 is crossed to an arbitrary position while weaving the winding nozzle 7a as indicated by an arrow locus X indicated by an arrow in FIG. For example, the magnetic pole part cover parts 41a and 42a are moved in the circumferential direction above the magnetic pole part cover parts 41a and 42a and inserted into the slot from above through the gap between the magnetic pole part cover parts 41a and 42a. The winding nozzle 7a is moved up and down between the magnetic pole portions 3, and the connecting wire 6 is inserted into the gap α between the guide flange portion 45 and the wall surfaces 46 of the cylindrical bodies 41b and 42b from the tip of the winding nozzle 7a. (See FIG. 4).
Next, the winding nozzle 7 a is rotated around the magnetic pole part 3 covered with the magnetic pole part cover parts 41 a and 42 a, and the winding 5 is wound around the magnetic pole part 3. Then, after winding the predetermined winding 5, the winding nozzle 7 a is moved downward through the magnetic pole portions 3 (see FIG. 5), and then the winding machine 7 is rotated by a certain angle to wind the winding. The nozzle 7a is passed under the adjacent magnetic pole portion 3 and is inserted into the gap α between the guide flange portion 45 on the lower side of the adjacent magnetic pole portion 3 and the wall surface 46 of the cylindrical bodies 41b and 42b. Then, the winding 5 is wound around the magnetic pole part 3 covered with the next magnetic pole part cover parts 41a and 42a, and this time, the winding nozzle 7a is moved upward to pass through the slot, and the magnetic pole part 3, the winding nozzle 7 a is rotated and moved. In this way, the winding 5 is wound while moving the crossover wire 6 sequentially to the adjacent magnetic pole portion 3 while sequentially moving in the circumferential direction. Both ends of the crossover wire 6 are wound around and fixed to pins provided outside the wall surfaces 46 of the cylindrical bodies 41 b and 42 b of the stator cover 4.

The winding 5 is wound around the magnetic pole part 3 covered with the magnetic pole part cover parts 41a and 42a while moving the winding nozzle 7a as described above. Since the connecting wire 6 is inserted and positioned in the gap α between the guide flange portion 45 of the stator cover 4 and the wall surface 46 of the cylindrical bodies 41b and 42b, the connecting wire 6 hinders the operation of the winding nozzle 7a. There is nothing. Further, there is no fear that the winding 5 is damaged or disconnected by the winding nozzle 7a. The guide flange portion 45 is provided at the position of the magnetic pole portion cover portions 41 a and 42 a of the stator cover 4, and is formed in a shape / size that does not interfere with the winding operation of the winding 5.
Since the guide flange portion 45 is provided on the outermost diameter side of the position of the magnetic pole portion cover portions 41a and 42a of the stator cover 4, it is possible to prevent the connecting wire 6 from moving closer to the inner diameter side.
In the above embodiment, since the jumper wire 6 is passed through the positions of the magnetic pole part cover portions 41a and 42a of the stator cover 4, it is not necessary to ensure insulation between the jumper wire 6 and the motor case 4.

Since the connecting wire 6 is fixed to the outermost diameter side of the position of the magnetic pole part cover portions 41a, 42a of the stator cover 4, the swinging width of the winding nozzle 7a can be taken to the full inner and outer diameters. Therefore, the degree of freedom of movement of the winding nozzle 7a during winding is high, and aligned windings 5 are possible around the magnetic pole portion 3.
When winding the winding 5 around the magnetic pole part 3 covered with the magnetic pole part cover parts 41a and 42a, it is also possible to wind the winding 5 after passing the jumper wire 6, and the winding 5 is wound. After that, the crossover 6 can be crossed.
When the winding 5 is ahead and the connecting wire 6 is behind, the connecting wire 6 crosses the outer periphery of the winding 5, so that the guide flange portion 45 is used as an original use, that is, as a connecting wire guide. Absent.
For this reason, the position of the connecting wire 6 becomes somewhat unstable, but since the winding 5 has already been wound, there is no possibility of contact with the winding nozzle during winding.

Next, FIG. 6A thru | or FIG. 6B is a modification of the crossover guide part of this invention, demonstrates the same part as FIG. 1 and FIG.
6A shows a guide flange portion 45A as a crossover guide portion provided with protrusions on the entire end surface and side surfaces along the periphery of the magnetic pole portion cover portions 41a and 42a of the stator cover 4. FIG. As a result, the crossover 6 can be easily inserted and removed.
FIG. 6B shows an example in which the height of the guide flange portion 45A in FIG. 6A is increased as the guide flange portion 45B as the crossover guide portion. By enlarging the guide flange 45B, the winding 5 and the crossover 6 can be separated. In this modification, insulation between the crossover wire 6 and the winding 5 can be ensured.
FIG. 6C shows a groove 45 </ b> C formed as a crossover guide portion instead of the guide flange portion 45 of FIG. 2. The movement of the connecting wire 6 in the radial direction is locked by the inner wall surface of the concave groove 45C.
FIG. 6D shows the guide flange portion 45 of FIG. 2 formed on a part of the end face of the magnetic pole portion 3 of the stator cover 4 as a guide flange portion 45D as a crossover guide portion.
FIG. 6E shows a guide flange 45D shown in FIG. 6D formed at the center of the end face as a guide flange 45E as a crossover guide.

  The present invention is not limited to the above-described embodiment. For example, the height or thickness of the guide flange portion 45 as the crossover guide portion formed on the stator cover 4 is appropriately set. The shape and the like can be arbitrarily set. In addition, an arbitrary method can be selected as a method for moving the crossover line 6.

It is a conceptual perspective view which shows the stator structure for rotary electric machines by embodiment of this invention. It is a partial expansion perspective view which shows the flange part for a guide as a crossover guide part of FIG. It is the sectional view on the AA line of FIG. It is a conceptual perspective view which shows the work procedure of the crossover by a winding machine. It is a conceptual perspective view which shows the work procedure of the crossover by a winding machine. It is a perspective view which shows the modification of the flange part for a guide as a crossover guide part. It is a perspective view which shows the modification of the flange part for a guide as a crossover guide part. It is a perspective view which shows the modification of the flange part for a guide as a crossover guide part. It is a perspective view which shows the modification of the flange part for a guide as a crossover guide part. It is a perspective view which shows the modification of the flange part for a guide as a crossover guide part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Yoke 3 Magnetic pole part 4 Stator cover 5 Winding 6 Crossover 7 Winding machine 7a Winding nozzle 41, 42 Cover main body 41a, 42a Magnetic pole part cover part 41b, 42b Cylindrical body 44 Stopper flange part 45 Guide flange 45A, 45B, 45D, 45E Guide flange 45C Concave groove 46 Wall surface

Claims (5)

A stator core in which a plurality of magnetic pole portions are radially arranged at regular intervals along the circumferential direction on the inner peripheral side of the annular yoke, and each magnetic pole portion around which at least a winding of the stator core is wound In a stator structure for a rotating electrical machine comprising a stator cover that covers the outer surface of the stator cover that is insulated from the outside, and windings that are wound around each magnetic pole portion covered with the stator cover.
In the vicinity of the yoke side of the magnetic pole part cover part of the stator cover that covers the outer surface of the magnetic pole part, a crossover guide part for locking the movement of the crossover wire in the radial direction of the stator cover is provided, and the stator cover A flange wall surface projecting in the axial direction is provided on the outer peripheral side of the magnetic pole part cover part, and a gap through which the connecting wire of the winding passes is provided between the flange wall surface and the crossover guide part. For a rotating electrical machine, wherein a crossover wire extending from the magnetic pole portion cover portion of the winding to be wound to an adjacent magnetic pole portion cover portion is inserted between the crossover wire guide portion and a flange wall surface of the stator cover. Stator structure. The connecting wire that sequentially crosses along the circumferential direction passes through the magnetic pole portion cover portions adjacent to each other of the stator cover alternately through the outer side of the magnetic pole portion cover portion on one side and the other side in the axial direction of the stator cover. The stator structure for a rotating electric machine according to claim 1, wherein the connecting wire guide portion and the outer peripheral flange wall surface of the stator cover are inserted through the stator wire. 3. The crossover guide portion is configured by forming a protrusion on an end surface and / or a side surface of an end portion on the yoke side of the magnetic pole portion cover portion of the stator cover. Stator structure for rotating electrical machines. 4. The stator structure for a rotating electrical machine according to claim 3, wherein the protruding portion is formed in the entire region or a part of an end surface and / or a side surface of an end portion on the yoke side of the magnetic pole portion cover portion. A concave groove is formed in an end surface and / or a side surface of a yoke side end of the magnetic pole portion cover portion of the stator cover, and the crossover guide portion is configured by the inner wall surface of the concave groove. Item 3. The stator structure for a rotating electrical machine according to Item 1 or 2.