JP2002272045A - Stator structure of rotating magnetic field electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator structure of a rotating magnetic field electric apparatus, wherein coils are wound in alignment within the slots by enhancing alignment characteristic of the coils, insulation of coils is protected and possibility of broken wire is lowered, in the centralized coil in which the wire is wound directly on a pole tooth via an insulator. SOLUTION: There is provided the structure of stator of the rotating magnetic field electric apparatus, wherein a stator core consisting of a plurality of pole teeth provided opposed to a rotor is provided, with each pole tooth composed of a coil core which is wound with a wire of coil and a collar at the end part in the rotor side of the coil core, slots are formed between adjacent pole teeth, the aperture of each slot is formed between the adjacent collar portions, an insulator is provided to cover the stator core, and the coil is formed by winding the wire to the coil cores of the pole teeth via the insulator. The insulator 12 at the wall surface of the slot 13 of the pole tooth 60 is formed, so as to provide non uniform thickness between the end part side and the root side part of the pole tooth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating field type electric device comprising a stator having a coil wound thereon and a rotor having a fixed magnet, and more particularly to a stator structure thereof.

[0002]

2. Description of the Related Art In a rotating field type electric device (such as a brushless motor or an alternator), a rotor having a magnet for forming a magnetic field rotates inside or outside a stator having a coil. This stator is formed by winding a coil around a stator core made of a magnetic material having magnetic pole teeth via an insulator (insulator).

In a concentrated winding system in which a coil is directly wound around a stator of such a rotating field type electric device, the coil uses an insulating material, for example, a coating with an epoxy powder or an aromatic aramid fiber on magnetic pole teeth. It is wound via an insulator (insulator) integrally formed of resin corresponding to the shape of the insulating paper or the stator. Such an insulating material is formed with a uniform thickness on the wall surface of the slot formed between the magnetic pole teeth.

When a coil is formed by winding a winding on a magnetic pole tooth via such an insulating material, as the number of windings increases, the coil diameter increases in a layered manner (or to some extent disturbed) and the inside of the slot becomes larger. A coil of magnetic pole teeth on both sides is formed.

However, when a coil is formed via an insulating material such as a molded insulator having a uniform thickness, when the coil is wound, the swelling of the central portion of the magnetic pole teeth increases as the coil is wound. Before winding a large number of turns, the gap between the coils on both sides in the slot becomes narrower at the center, and the needle that winds around the magnetic pole teeth while reciprocating in the center of the slot while supplying windings comes into contact. As a result, the winding surface may be damaged, resulting in impaired insulation or disconnection. Further, depending on the diameter of the winding, the characteristics of the needle winding operation, and the like, the winding may be locally thickened or may be wound in an uneven shape other than at the center. Also in such a case, the gap between the coil surfaces on both sides in the slot is narrowed, so that it is easy to come into contact with the needle, which causes a decrease in insulation function and a disconnection.

On the other hand, in the case of the concentrated winding method in which a coil is wound directly on the stator of the above-mentioned rotating field type electric device, the following five methods have been conventionally used as a method for manufacturing the coil. That is, using a needle through which a winding (enameled wire) is passed through the magnetic pole teeth of the stator core having an integral structure, the winding is wound in the vicinity of the magnetic pole teeth, and the wound winding is slid alternately. A traverse swing type in which the winding is wound down by a winding guide called each two guides or formers, or a needle swing type in which a needle reciprocates in a slot between magnetic pole teeth; Is divided into two parts, a core having a radially projecting portion with a continuous inner diameter and an outer peripheral core fitted to the core. (1) A winding is wound around a bobbin to form a coil complete, which is fitted to the projecting portion from the outer periphery. After joining, the outer core is further fitted with a bobbin winding method; (2) a winding is wound directly on a core having a continuous radial projection with an inner diameter via an insulator, and thereafter Outer winding method of fitting the peripheral core; In the case of the same inner rotor type as above, the stator core is divided into a plurality of core pieces for each magnetic pole tooth, and the winding is wound via an insulator for each core piece, and then the laser is used. A pole split core method for welding and merging; In a stator core having the same integral structure as described above, a needle-sewing method in which needles are sequentially sewn through slots between magnetic pole teeth in the manner of needle stitching to wind windings; An armadillo method in which a stator core to be shaped is once developed into a linear motion shape like a linear motor, and windings are wound through an insulator in this expanded state, and then returned to a cylindrical shape to join a boundary portion (for example, (Kaihei 9-191588).

[0007] A winding device for winding a coil around a stator core of an inner rotor type rotating field type electric device includes: a. When winding the winding directly from the inner diameter side through an insulator on the stator core of the integral structure, the needle passing through the winding is fed into the slot, and this needle is rocked,
Alternatively, a winding device configured to swing a guide by swinging a guide for dropping the winding (for example, Japanese Patent No. 2813556)
No.); and b. A cam-shaped member provided with a mechanism for stopping the needle outside the inner diameter side slot of the stator core (without inserting the needle inside the slot) and for reciprocally transferring the winding to a predetermined position at the upper and lower ends of the stator core via an insulator. There has been known a winding device (Japanese Patent Laid-Open No. 2000-270524) configured to hold and release a winding to wind down on a core.

[0008]

However, the above-described conventional method of manufacturing a coil for a stator core has the following problems.

In the above case, the needle must be inserted into the slot from the slot opening, and the space for passing the needle in the coil accommodation sectional area of the slot becomes a dead space, and the winding density is restricted. Lower the moment. In addition, even when a winding guide by a former is used, it is difficult to increase the winding density due to lack of winding alignment, and a stator with a large number of magnetic pole teeth or a small inner diameter of an inner-rotation field type stator is used. Is difficult to cope with, and the structure becomes complicated and the device becomes large.

In the above case, the divided stator cores must be fitted, and measures must be taken to maintain the dimensional accuracy, prevent the coils from coming off, and prevent the coil from jumping out to the outer periphery of the stator. The nature also decreases. In particular, in the case of the above (1), there is a problem that the winding density may not be increased due to the deformation of the bobbin flange due to the winding and interference with the outer peripheral core and the dead space of the flange portion. In the case of the above (2), problems such as a decrease in the space factor occur as in the above case.

In the above case, welding by laser or the like must be performed for each core piece, and there is a problem in dimensional accuracy and connection reliability of the winding. In the above case, the number of steps is increased, and there is a problem in productivity. In the above case, similarly to the above, there is a problem of dimensional accuracy, a problem of stress on the winding, and a problem of disconnection, so that the reliability of connection cannot be improved.

In the above-described conventional winding device,
In the case of the above device a, the space from the slot opening to the back of the slot in the passage portion of the needle becomes a dead space, and it is impossible to apply a winding to this portion, and therefore, the winding density (occupation ratio) Cannot be increased. Further, since the needle reciprocates in the slot, the needle and the previously wound winding may come into contact with each other in the slot, and the reliability of insulation may be reduced.

Further, in the case of the device b, the mechanism for gripping and releasing the winding becomes complicated, and the winding operation must be repeated by the mechanism for each turn of the winding, thereby increasing the speed. Lowers productivity. Further, since the winding of the winding is repeatedly performed by the cam-shaped member, the alignment of the winding to the magnetic pole teeth is reduced. In addition, since the needle does not enter the slot at all, a mechanism or a member for introducing the winding into the slot is required. It may decrease.

In particular, in a conventional stator structure of a rotating field type electric device, a stator in which a coil is wound using a thick winding having a wire diameter corresponding to a low voltage and a large current in order to increase output, and cogging are reduced. In order to obtain a smooth rotation operation, a stator having a large number of magnetic pole teeth is required. In the case of manufacturing such a stator coil, the width of the slot opening becomes narrower than the needle diameter, so that the needle operation may be restricted and the winding may not be smoothly introduced into the slot.

In the conventional method of manufacturing a coil using a winding winding apparatus, particularly when a thick winding is used, the coil can be formed with a simple structure without inserting the needle all the way into the slot. There is a demand for a method of manufacturing a coil that can be wound up and wound around magnetic pole teeth smoothly without damaging the winding without providing a dead space for passing a needle in a slot.

The present invention has been made in consideration of the above-mentioned prior art, and is directed to a concentrated winding type coil in which a winding is wound directly on a magnetic pole tooth of an integral stator core via an insulator. The purpose of the present invention is to provide a stator structure of a rotating field type electric device in which windings are arranged and wound inside to increase a space factor, improve productivity, protect insulation of windings and reduce a risk of disconnection. And

Still another object of the present invention is to provide a stator structure of a rotating field type electric device capable of uniformly aligning a coil surface in a slot with a straight line.

[0018]

In order to achieve the above object, according to the present invention, there is provided a circular core portion made of a magnetic material, and a plurality of circular core portions protruding from the inner or outer periphery thereof and facing the rotor. A stator core consisting of magnetic pole teeth,
Each of the magnetic pole teeth, a core portion around which the coil winding is wound,
A flange formed at the rotor-side end of the winding core, slots are formed between adjacent magnetic pole teeth, openings of each slot are formed between adjacent flanges, and an insulator is provided to cover the stator core; In a stator structure of a rotating field electric device in which a coil is formed by winding a coil around a core portion of the magnetic pole tooth via the insulator, an insulator on a slot wall portion of the magnetic pole tooth is provided with an insulator of the magnetic pole tooth. Provided is a stator structure for a rotating field type electric device, characterized in that the thickness is non-uniform between an end side and a base side.

According to this configuration, the surface of the coil winding shape in the slot is flat in correspondence with the coil winding shape when the slot wall surfaces on both sides of the magnetic pole teeth which are known in advance are in a parallel plane state. The thickness of the insulator on the slot wall surface can be made non-uniform in advance so that As a result, the coil surfaces on both sides in the slot become linear (planar) parallel to each other when the coil is wound, so that the contact between the two coils and the contact with the needle when the number of turns is increased is prevented. There is no risk of impairing the insulation of the winding or disconnection, and a highly reliable stator function can be obtained.

[0020] In a preferred configuration example, the insulator is characterized in that the thickness is changed in a certain direction so that the end portion of the magnetic pole tooth is thicker and the root side is thinner.

According to this configuration, the coil can be formed on the magnetic pole teeth while sliding the winding without inserting the needle into the slot.

In another preferred embodiment, the insulator is formed of a concave curved surface, a convex curved surface, or a continuous uneven surface.

According to this structure, the insulator has an uneven thickness in response to the coil surface having a bulge, a dent, an irregularity, or a wavy shape in addition to the inclination in a certain direction. Can be formed.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of an inner rotor type brushless motor according to an embodiment of the present invention.

The brushless motor 1 includes a case body 2
Cylindrical stator 3 fixed therein and stator 3
Of the case body 2
Is covered with a lid 5. The rotor 4 has a plurality of magnets 7 fixed at radial positions on an outer periphery of a cylindrical yoke 6, a head 4 a thereof is rotatably supported on a lid 5 by a bearing 8, and an output shaft 9 is mounted on a case body 10. It is rotatably supported and protrudes from this case body 10.

The stator 3 includes a stator core 11 formed by laminating a plurality of core pieces made of a magnetic material such as an iron plate to form an integral structure, and an insulator 12 covering the stator core 11. The stator core 11 includes a ring-shaped outer core 26 and magnetic pole teeth 2 provided radially integrally on the inner side of the outer core 26 as described later (FIG. 3).
The magnetic pole teeth 27 face the magnet 7 of the rotor 4. Slots 13 are formed between the magnetic pole teeth 27.

The insulator 12 includes an upper insulator 12a (left side in the figure) and a lower insulator 12a.
b, which are inserted into the slots 13 of the stator core 11 from above and below (both ends of the cylindrical stator core 11, right and left in the figure) and attached. A taper member 16 made of an insulating material is joined to each of the insulators 12a and 12b, and a coil (enamel wire) 17 is wound over the insulators 12a and 12b to form a coil 18 on the inclined surface. Is done. As described later, each coil 1 is provided on the outer peripheral side of the upper insulator 12a.
A crossover line 19 for connecting 8 is provided.

A ring-shaped wiring board 32 for controlling energization of the coil 18 is provided on the lower surface side (the right lid side in the figure) of the stator 3. The wiring board 32 is attached to, for example, the lower insulator 12b and fixed in the case body 2.

Each of the insulators 12a and 12b has a taper member 16 integral with or joined thereto, and a coil 18 slides down on the inclined surface to form a coil 18 as described later.

FIG. 2 is a partial perspective view of the insulator 12. The insulator 12 includes a ring-shaped outer edge portion 20 on the outer periphery and a bobbin portion 21 protruding inside the outer edge portion 20.
And a coil flange portion 22 at the tip of the bobbin portion 21 and a slot flange portion 23 below the coil flange portion 22.
And a slot insertion portion 24 formed below the outer edge portion 20 and the bobbin portion 21, and a wall-shaped projection 25 provided on the outer edge portion 20 at the root side of the bobbin portion 21, and is integrally molded with an insulating resin material. It was done. Taper member 1
6 is fixed to the upper surface of each bobbin portion 21 with an adhesive or the like. The tapered member 16 may be formed integrally with the insulator 12 by molding. It is preferable that the tapered member 16 be integrally formed with the insulator 12 from the viewpoint of reducing the number of parts and the number of assembling steps. The protrusions 25 can be used for securing a crossover, for receiving a coil winding, or for locking a winding at the beginning of coil winding of the second and subsequent layers as described later. Such a protrusion 25
Are provided at appropriate positions by the required number of outer edges 20 (see FIG. 4).

In the present embodiment, the thickness of the insulator 12 at the portion covering the slot wall surfaces (see FIG. 3) on both sides of the magnetic pole teeth is reduced so that the thickness decreases from the end side of the magnetic pole teeth toward the root side. Is changing. This is, as will be described later, when the winding is wound, the needle is inserted into the slot without being inserted into the slot, the winding is operated at the slot entrance, the winding is slid, and the coil is wound on the magnetic pole teeth. That's why.

FIG. 3 shows the shape of the stator core 11.
(A) is a top view, (B) is a side view, and (C) is a bottom view. The stator core 11 includes a cylindrical ring-shaped outer peripheral core 26.
And a plurality of magnetic pole teeth 27 radially protruding toward the inner peripheral side of the outer peripheral core 26. Each magnetic pole tooth 27 is formed by a core part 28 around which a coil is wound, and a flange part 29 projecting to the left and right sides at the tip of the core part 28. A slot 13 is formed between each adjacent pole tooth 27. An opening 30 of the slot 13 is formed between the flanges 29 of each adjacent magnetic pole tooth 27. A reference groove 31 for positioning is formed on a side surface of the outer peripheral core 26 having a cylindrical ring shape.

FIGS. 4A and 4B show the shape of the stator 3 assembled by mounting the insulator 12 on the stator core 11, wherein FIG. 4A is a top view, FIG. 4B is a side view, and FIG. . Insulators 12a and 12b are provided in each slot 13 from both the upper and lower surfaces of the stator core 11 of FIG.
Is inserted into the slot insertion portion 24 (see FIG. 2), and an assembly of the stator 3 is formed. In this example, a projection 25a for locking the crossover is formed on the outer edge portion 20 of the upper insulator 12a. A projection 2 for attaching a wiring board 32 (FIG. 1) is provided on the outer edge 20 of the lower insulator 12b.
5b is provided, and a wiring board (not shown) is locked and held at its tip. The above-described tapered member 16 is provided on the bobbin portion 21 (the core portion 28 of the magnetic pole teeth 27 in FIG. 3) of each of the insulators 12a and 12b, but is not shown (only one position is shown in each of the upper and lower portions in the figure). Hatched).

FIG. 5 is an explanatory diagram of the coil wiring of the above embodiment. In this embodiment, the winding 18 is wound around three of the nine magnetic pole teeth 27, and C is common.
Are continuously formed to form a UVW three-phase motor. As shown in (A), the coil of each phase of UVW is formed continuously from the coil winding (arrow C) at the beginning of winding to the adjacent coil via the crossover wire 19, and the winding of the winding end coil is formed. Are taken out as coil terminals of UVW.
The crossover 19 is provided through the rear side (outer peripheral side) of the projection 25a formed on the outer edge 20 of the insulator 12a. (B) is a wiring diagram of the coil of (A).

FIG. 6 shows an example of the shape of the tapered member 16 (including the structure integrally formed with the insulator 12) of the present invention. (A) is a shape in which the cross-section (cross-section in the direction of inclination) of the tapered member 16 is formed of a convex curve, and the inclined end thereof reaches the projection 25 for receiving the coil. The convex curve is an arc or any other suitable curve shape.

FIG. 3B shows a shape in which the vertical section (section in the inclined direction) of the tapered member 16 is formed of a concave curve, and the inclined end thereof reaches the projection 25 for receiving the coil. The concave curve is an arc or any other suitable curve shape.

(C) is a shape in which the vertical cross section (cross section in the inclined direction) of the tapered member 16 is a straight line, and the inclined end ends before the coil receiving projection 25. A flat portion 33 is formed between them.

In each example, the cross section (cross section perpendicular to the tilt direction) is an arc or other suitable convex curve as shown in (D), and the tilt direction as shown by a, b and c. As the height decreases, the curvature (curvature) decreases and approaches a plane.

In the cases (A) and (B), the flat portion 33 may be provided as in the case (C). Further, in the case of (C), as shown in FIG. 1, the inclined end may be formed so as to reach the projection 25.

Further, since the coil winding is wound through the slot, even if the coil receiving projection 25 is not provided, the inner wall surface of the slot (the inner wall surface of the slot insertion portion 24) is formed by the coil winding. As a pressing member, the winding of the coil end portion (the coil wound around the tapered member) does not significantly collapse. However, in order to arrange the windings in a layered manner on the tapered surface and wind them at a high density, the projections 25 for receiving the coil are effective, and it is necessary to provide the projections 25 on the winding cores of all the pole teeth. desirable.

FIGS. 7, 8 and 9 are explanatory views showing the operation of the winding device for forming a coil on the stator of the present invention. FIG. 7 is a front view of the stator, and FIG.
Is a view of the magnetic pole teeth viewed from the inner peripheral surface side, and FIG. 9 is a sectional view passing through the center of the stator.

A winding device for winding the above-mentioned coil on the magnetic pole teeth of the stator 3 (the whole structure is not shown) is shown in FIG.
As shown in the figure, the pipe-shaped needle 36 for supplying the winding 17 is provided. The inner diameter of the needle 36 is a diameter through which the winding 17 is inserted, and the outer diameter is a diameter through which the opening 30 of each slot between the magnetic pole teeth 27 can be inserted. This needle 36 is a reciprocating pipe 37 that reciprocates the inner circumference of the stator 3 in the axial direction thereof.
Attached to the tip of The winding 17 is a winding roll 38
And is supplied by being unwound from the insertion hole 3 in the reciprocating pipe 37.
9 and is pulled out from the tip of the needle 36 with the coil winding operation (arrow R). The leading end of the winding 17 is fixedly supported by the clamping means (not shown) at the root side of the magnetic pole teeth for winding the coil (outer side of the stator 3, a clamp position indicated by a cross in the drawing), and during the winding operation. Will be retained.

The reciprocating pipe 37 is capable of reciprocating on the inner periphery of the stator 3 in the direction of the axis C as shown by the arrow Q. The needle 36 is connected to the lower coil flange portion in accordance with the axial length of the stator 3. The needle 36 reciprocates between a lower end position that is lower than 22 (solid line in FIG. 9) and an upper end position that is higher than the upper coil flange portion 22 (dashed line in FIG. 9). The reciprocating pipe 37 is rotatable around its axis C as indicated by an arrow P, and at the upper end position and the lower end position where the needle 36 extends vertically and outwardly of the stator 3, as shown by W in FIG. It rotates by the width of the magnetic pole teeth.

During the coil winding operation, the needle 36 is held at a constant position in the depth direction of the slot 13 (radiation direction from the end of the magnetic pole teeth 27 to the root) and does not move. The tip of the needle 36 is inserted through the opening (opening of the slot 13) 30 between the magnetic pole teeth 27 and is held near the end of the magnetic pole tooth 27.

The winding operation of the coil is as shown in FIG.
A needle 36 is wound around each magnetic pole tooth 27 as shown by arrows P and Q to wind the winding 17. At this time,
The winding 17 is wound at a fixed position on the winding start side (higher side) of the taper member 16. Since the leading end of the winding 17 is clamped outside the lower side of the tapered member 16 (outer peripheral side of the stator 3), the winding 17 is sequentially pulled out from the leading end of the needle with the winding operation of the needle 36, and the magnetic pole teeth Is wound on the tapered member 16. The winding wound on the tapered member 16 receives tension between the outer peripheral side (lower side) and the inner peripheral side (higher side) of the tapered surface. It slides down along the inclined surface due to the pressing force of the winding wound around it. As a result, the windings are sequentially extruded onto the tapered surface to form a first-layer coil,
Further, by continuing the winding operation, the second-layer winding slides on the first-layer coil to form a second-layer coil,
The coils are formed by sequentially winding the coils in layers. The angle of inclination of the tapered member 16 is set to an angle at which the taper member 16 easily slides according to the diameter, the number of turns, and the like.

When the coil of the second layer is formed after the coil of the first layer has been formed on the tapered surface, for example, in order to temporarily hook the winding on the projection 34 on the outer peripheral side, the needle 36 is fixed to the stator. A configuration in which the needle 36 can be moved in the depth direction in a state where the needle 36 is raised or lowered from the position 3 or a configuration in which the reciprocating pipe 37 itself can be moved in the depth direction is also possible.

Further, a plurality of needles may be provided to simultaneously perform the coil forming operation at a plurality of locations. For example, three needles may be radially arranged at intervals of 120 ° and the coils may be wound around three magnetic pole teeth simultaneously.

FIGS. 10A to 10D show examples of the shape of the insulator according to the embodiment of the present invention. 2A, the insulators 12 on both sides (wall surfaces facing the slots 13) of the magnetic pole teeth 60 of the stator core 11 have their cross-sectional surfaces directed from the end side to the base side of the magnetic pole teeth 60 as shown in the figure. It is inclined linearly. (B) shows the case where the inclination angle is reduced. (C) is a view in which the inclination angle is changed substantially at the center of the magnetic pole teeth 60.
(D) is curved and inclined. In any case, the magnetic pole teeth 60 are inclined in a certain direction so that the end side is thick and the root side is thin. This, as described above,
When winding the coil, the coil can be formed by sliding the winding without moving the needle near the entrance 30 of the slot 13 and moving the needle to the back side.

FIG. 11 shows another embodiment of the present invention.
In this embodiment, the slot insertion portion 24 (hatched portion in the figure) of the insulator 12 is formed in a wavy shape having continuous irregularities. By making such a shape,
The surface of the coil 18 on both sides in the slot 13 can be flattened.
, And the coils 18 are prevented from hitting each other.

This embodiment is not limited to the case where the coil is formed by sliding down the above-mentioned winding, but the needle is inserted into the slot 1
The present invention is also applicable to a stator of a type in which a coil is wound by moving the coil within the coil 3. The uneven shape of the insulator 12 is as follows.
When the unevenness of the coil surface due to the winding operation of the winding when the insulator is flat is known, the coil is formed in advance corresponding to the unevenness so that the unevenness is eliminated.

The shape of the insulator surface is as follows.
The shape is not limited to the shape in which the thickness changes in a certain direction. The shape may be a convex curved surface.

In any case, the thickness of the insulator is changed so that the surfaces of the coils 18 on both sides in the slot 13 are parallel flat surfaces. This allows
The coil can be wound at high density in the slot to increase the space factor. In this case, a sufficient space can be formed between the two coils in the center of the slot, and even in the case of the winding method in which the needle is moved, the contact between the needle and the winding is prevented to prevent the wound from being damaged. The risk of sticking and disconnection can be reduced.

[0053]

As described above, according to the present invention, the coil winding in the slot corresponds to the known winding shape of the coil when the slot wall surfaces on both sides of the magnetic pole teeth are in a parallel plane state. The thickness of the insulator on the slot wall surface is previously made non-uniform so that the linear surface becomes flat. As a result, the coil surfaces on both sides in the slot become linear (planar) parallel to each other when the coil is wound, so that the contact between the two coils and the contact with the needle when the number of turns is increased is prevented. There is no risk of impairing the insulation of the winding or disconnection, and a highly reliable stator function can be obtained.

In this case, if the insulator is formed so that the thickness changes in a fixed direction so that the end side of the magnetic pole tooth is thicker and the root side is thinner, the winding can be slid without inserting the needle into the slot. The coil can be formed on the magnetic pole teeth while being rotated. As a result, in a series-wound (concentrated winding) coil in which a winding (enamel wire or the like) is wound through an insulator for each magnetic pole tooth, the winding is sequentially slid down along the slope of the insulator that winds the winding. It can be wound while making it. Therefore, there is no need for a guide mechanism or the like for pushing or feeding the winding into the slot, which reduces the possibility of the winding being damaged or disconnected, and sequentially arranges the winding with a simple configuration to wind the winding at a high density. By turning, the space factor can be increased, and the winding speed of the winding can be increased to improve the productivity.

[Brief description of the drawings]

FIG. 1 is a sectional configuration diagram of a brushless motor according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of an insulator of the motor shown in FIG. 1;

FIG. 3 is a configuration diagram of a stator core of the motor of FIG. 1;

FIG. 4 is a configuration diagram of a stator assembly of the motor of FIG. 1;

FIG. 5 is an explanatory diagram of coil wiring of the motor of FIG. 1;

FIG. 6 is an explanatory view of the shape of the tapered member of the present invention.

FIG. 7 is an explanatory view of the winding method of the present invention viewed from the top of the stator.

FIG. 8 is an explanatory view of the winding method of the present invention viewed from the inner peripheral surface of the magnetic pole teeth.

FIG. 9 is an explanatory view of a winding method of the present invention in a section of a stator.

FIG. 10 is an explanatory view showing an example of the shape of the insulator of the present invention.

FIG. 11 is an explanatory view of the shape of another embodiment of the present invention.

[Explanation of symbols]

1: brushless motor, 2: case body, 3: stator, 4: rotor, 4a: head, 5: lid, 6: yoke,
7: magnet, 8: bearing, 9: output shaft, 10:
Bearing, 11: stator core, 12: insulator, 12a: upper insulator, 12b: lower insulator, 13: slot, 16: tapered member, 17:
Winding, 18: coil, 19: crossover, 20: outer edge, 2
1: bobbin part, 22: coil flange part, 23: slot flange part, 24: slot insertion part, 25, 25
a, 25b: protrusion, 26: outer peripheral core, 27: magnetic pole teeth,
28: winding core, 29: flange, 30: opening, 31: reference groove, 32: wiring board, 33: flat, 36: needle, 3
7: reciprocating pipe, 38: winding roll, 39: insertion hole, 6
0: Magnetic pole teeth.

Continued on the front page F term (reference) 5H603 AA03 AA04 AA09 BB01 BB09 BB12 CA01 CA05 CB02 CB03 CB26 CC11 CD01 CD21 CE01 FA01 FA02 5H604 AA08 BB01 BB10 BB14 BB17 CC01 CC05 CC16 DB01 DB26 DB30 PB03 5H615 BB01 QB19 RR01 RR02 5H621 BB07 BB10 GA01 GA04 JK01

Claims (3)

[Claims] 1. A stator core comprising: a circular core portion made of a magnetic material; and a plurality of magnetic pole teeth integrally formed with the circular core portion and protruding from the inner or outer circumference thereof and facing the rotor. A core part around which the coil winding is wound;
A flange portion at an end of the core portion on the rotor side, a slot is formed between adjacent magnetic pole teeth, an opening of each slot is formed between adjacent flange portions, and an insulator for covering the stator core is provided. In the stator structure of a rotating field type electric device in which a coil is formed by winding a winding around a core portion of the magnetic pole tooth via the insulator, an insulator on a slot wall portion of the magnetic pole tooth is provided with an insulator of the magnetic pole tooth. A stator structure for a rotating field type electric device, wherein the thickness is non-uniform between an end side and a base side. 2. The rotating field type electric machine according to claim 1, wherein the insulator has a thickness that changes in a certain direction so that the end of the magnetic pole tooth is thicker and the root side is thinner. Equipment stator structure. 3. The stator structure according to claim 1, wherein the insulator comprises a concave surface, a convex surface, or a continuous uneven surface.