JPH11215744A - Stator of brushless motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for a brushless motor capable of increasing a conductor space factor without reducing it. SOLUTION: A stator iron core is made by stacking a plurality of pieces, each of which has its outer part connected like a ring and has a plurality of magnetic pole teeth 2 which project inwards. A slot 3 is formed between each adjacent magnetic pole teeth 2, and slot opening sections 3a are formed at the inner side of the stator iron core 1 for a wider nozzle 5 to pass through. A winding 4a is wound directly by the wider nozzle 5. The magnetic pole teeth 2 are tapered from an outer-side part 2a toward an inner-side part 2b. An insulator 6 has same thickness on the identical plane of the magnetic pole teeth 2, and a winding section 4 is nearly at right angles with the magnetic pole teeth 2 via the insulator 6. Insulating projections 6d ensure an insulation distance between ends 2d of the magnetic pole teeth and a winding 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a stator of a brushless motor, which is a kind of a small electric motor mainly used as a blower fan driving source for a room air conditioner, a water heater or the like.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for smaller and lighter products from the viewpoint of saving construction. The need for conversion is increasing.

Conventionally, this type of brushless motor stator has a configuration as shown in FIG. Hereinafter, the configuration will be described with reference to the drawings.

As shown in FIG. 9, 51 is a plurality of magnetic pole teeth 5 whose outer diameters are connected in a ring shape and protrude in the same direction in the inner diameter direction.
2, a slot 53 is formed between adjacent magnetic pole teeth 52, and a winding machine nozzle 55 for directly winding a winding 54a passes through the inner diameter side of the stator core 51. A slot opening 53a is provided, and 56 is an insulator having a uniform thickness on the same surface of the magnetic pole tooth 52, and 54 is a winding portion that is substantially orthogonal via the insulator. 5
Reference numeral 6d denotes an insulator protrusion for securing an insulation distance between the magnetic pole tooth tip 52d and the winding 54b.

In the above configuration, the stator core 51 is integrally molded with the insulator 56 or sandwiched from the axial direction, and the winding machine nozzle 55 is inserted into the slot opening 53a.
The winding 54a is wound directly around the magnetic pole teeth 52 while oscillating in the radial direction after passing through the stator, thereby completing the stator.

[0006]

In such a conventional brushless motor stator, the inner diameter side portion 5 of the magnetic pole tooth portion 52 is provided.
2b has an insulator protrusion 56d, and the winding machine nozzle 55 cannot be wound directly in an aligned manner by swinging, so that the winding 54a wound on the outer diameter side naturally collapses after being wound to some extent. Since the conductor is wound around the inner diameter side portion 52b, the amount of conductor in the inner diameter side portion 52b is reduced, and the conductor occupancy is limited to 55%. Therefore, it is required to improve the conductor occupancy. ing.

Further, when the stacked thickness of the stator core 51 is increased, the rotation speed of the winding machine nozzle 55 must be reduced, so that the winding 54a wound on the outer diameter side portion is unwound. In addition, there is a problem that the conductor occupancy decreases, and it is required to prevent the conductor occupancy from decreasing.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a stator of a brushless motor capable of improving conductor occupancy and preventing a decrease.

[0009]

According to a first aspect of the present invention, there is provided a stator for a brushless motor.
A stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and a required number of stacked stator cores, and a winding substantially orthogonal to the magnetic pole teeth via an insulator. And a stator of a brushless motor in which the magnetic pole teeth are tapered so as to become thinner from the outer diameter side toward the inner diameter side.

According to the present invention, it is possible to obtain a brushless motor stator capable of improving the conductor occupancy.

In order to achieve the above object, a second means is to provide a plurality of fixed poles having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction. A core and a winding portion that is substantially orthogonal to the magnetic pole teeth via an insulator, and has a tapered shape such that the thickness of the insulator facing the slot decreases from the outer diameter side toward the inner diameter side. The configuration of the stator of the brushless motor described above.

According to the present invention, a brushless motor stator capable of improving the conductor occupancy can be obtained.

In order to achieve the above object, a third means comprises a plurality of magnetic pole teeth and a plurality of slots which have an outer diameter connected in a ring shape and protrude in the inner diameter direction, and are fixed in a required number. A brushless taper having a core core and a winding portion that is substantially orthogonal to the magnetic pole tooth portion with an insulator interposed therebetween, and wherein the thickness of the insulator in the axial direction decreases from the outer diameter side to the inner diameter side. This is a configuration of a motor stator.

According to the present invention, it is possible to obtain a brushless motor stator which can improve the conductor occupancy and prevent the decrease.

[0015] In order to achieve the above object, a fourth means comprises a plurality of magnetic pole teeth and a plurality of slots protruding in the inner diameter direction, the outer diameter being formed in a ring shape, and a required number of fixed poles. An iron core, and a winding portion substantially orthogonal to the magnetic pole tooth portion with an insulator interposed therebetween, and a substantially rhombus shape so that the magnetic pole tooth portion becomes thinner from a predetermined radial position toward an inner diameter side and an outer diameter side. And a stator of the brushless motor described above.

According to the present invention, a brushless motor stator capable of improving the conductor occupancy can be obtained.

In order to achieve the above object, a fifth means comprises a plurality of magnetic pole teeth and a plurality of slots having an outer diameter connected in a ring shape and protruding in an inner diameter direction, and a fixed number of fixed number stacked. A core core and a winding portion substantially orthogonal to the magnetic pole tooth portion via an insulator are provided, and the thickness of the insulator facing the slot is increased from a predetermined radial position toward an inner diameter side and an outer diameter side. This is a brushless motor stator having a substantially mountain shape so as to be thin.

According to the present invention, there is provided a brushless motor stator capable of improving the conductor occupancy.

In order to achieve the above object, a sixth means comprises a plurality of fixed poles having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction. A core and a winding portion that is substantially orthogonal to the magnetic pole teeth via an insulator, and the thickness of the insulator in the axial direction decreases from a predetermined radial position toward an inner diameter side and an outer diameter side. This is a brushless motor stator having a substantially mountain shape.

According to the present invention, it is possible to obtain a brushless motor stator that can improve the conductor occupancy and prevent the decrease.

In order to achieve the above object, a seventh means comprises: a magnetic pole tooth piece divided in the circumferential direction for each magnetic pole tooth unit and laminated by a required number; And a winding part which is substantially orthogonal to the magnetic pole teeth. The magnetic pole tooth pieces are joined in a predetermined number in a ring shape to form a stator of the brushless motor of the first to sixth means.

According to the present invention, it is possible to obtain a brushless motor stator capable of improving the conductor occupancy and preventing the conductor occupancy from lowering.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a fixing device comprising a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and the required number of magnetic pole teeth are stacked. A brushless motor stator having a core core and a winding portion that is substantially orthogonal to the magnetic pole tooth portion via an insulator, and wherein the magnetic pole tooth portion is tapered so as to become thinner from the outer diameter side toward the inner diameter side. Because the tapered shape becomes thinner from the outer diameter side to the inner diameter side of the magnetic pole teeth, the windings easily collapse on the inner diameter side of the magnetic pole teeth. Has the effect of increasing.

According to a second aspect of the present invention, there is provided a stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is formed in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores; A winding portion substantially orthogonal to the magnetic pole tooth portion via an insulator, wherein the thickness of the insulator facing the slot is tapered so that the thickness decreases from the outer diameter side toward the inner diameter side. The stator has a tapered shape in which the circumferential thickness of the insulator interposed between the magnetic pole tooth portion and the winding portion is reduced from the outer diameter side to the inner diameter side. Since it is easy to collapse on the inner diameter side, the amount of conductor on the inner diameter side of the magnetic pole teeth increases.

According to a third aspect of the present invention, there is provided a stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is ring-shaped and protruding in the inner diameter direction, and a required number of laminated stator cores; A stator for a brushless motor having a tapered shape in which the magnetic pole tooth portion has a winding portion that is substantially orthogonal via an insulator, and the thickness of the insulator in the axial direction decreases from the outer diameter side to the inner diameter side. The winding is formed by the taper shape in which the thickness of the insulator interposed between the magnetic pole tooth portion and the winding portion decreases in the axial direction from the outer diameter side toward the inner diameter side. This has the effect of increasing the amount of conductor on the inner diameter side of the magnetic pole teeth.

According to a fourth aspect of the present invention, there is provided a stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is formed in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores; A brushless motor having a winding portion that is substantially orthogonal to the magnetic pole tooth portion with an insulator interposed therebetween, and has a substantially rhombic shape such that the magnetic pole tooth portion becomes thinner from a predetermined radial position toward an inner diameter side and an outer diameter side. The windings are wound around the inner and outer diameter side portions of the magnetic pole teeth with a substantially rhombic shape in which the magnetic pole teeth become thinner from the predetermined radial position toward the inner and outer diameter sides, respectively. Since it is easy to collapse, the amount of conductor on the inner diameter side portion and the outer diameter side portion of the magnetic pole tooth portion increases.

According to a fifth aspect of the present invention, there is provided a stator core comprising a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is ring-shaped and protruding in the inner diameter direction, and a required number of laminated stator cores; The magnetic pole tooth portion is provided with a winding portion that is substantially orthogonal via an insulator, and the thickness of the insulator facing the slot is reduced from a predetermined radial position toward an inner diameter side and an outer diameter side. This is a brushless motor stator with a mountain shape.The circumferential thickness of the insulator interposed between the magnetic pole tooth portion and the winding portion becomes thinner from the predetermined radial position toward the inner diameter side and the outer diameter side. Since the winding is easily collapsed on the inner diameter side and the outer diameter side of the magnetic pole teeth due to the formed substantially mountain shape, the effect of increasing the amount of conductor on the inner diameter side and the outer diameter side of the magnetic pole teeth is increased. Have.

According to a sixth aspect of the present invention, there is provided a stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is formed in a ring shape and protruding in the inner diameter direction, and the required number of stator cores are stacked; A winding portion that is substantially orthogonal to the magnetic pole tooth portion with an insulator interposed therebetween, and has a substantially mountain shape such that the thickness of the insulator in the axial direction decreases from a predetermined radial position toward an inner diameter side and an outer diameter side. A brushless motor stator, wherein the thickness of the insulator interposed between the magnetic pole tooth portion and the winding portion in the axial direction is reduced from the predetermined radial position toward the inner diameter side and the outer diameter side. Due to the mountain shape, the winding is easily rolled around the inner diameter side and the outer diameter side of the magnetic pole teeth, so that the amount of conductor on the inner diameter side and the outer diameter side of the magnetic pole teeth increases.

According to a seventh aspect of the present invention, there is provided a magnetic pole tooth piece divided in a circumferential direction for each magnetic pole tooth unit and laminated by a required number, and the magnetic pole tooth part is substantially interposed via an insulator. The stator of the brushless motor according to claim 1, further comprising an orthogonal winding portion, wherein the magnetic pole tooth pieces are joined in a predetermined number in an annular shape, wherein the magnetic pole tooth portion, the magnetic pole tooth portion, the winding portion, and Due to the shape of the insulator interposed between the windings, the windings easily collapse on the inner diameter side and the outer diameter side of the magnetic pole teeth, so that the amount of conductor on the inner diameter side and the outer diameter side of the magnetic pole teeth increases. It has the action of:

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

[0031]

(Embodiment 1) As shown in FIG. 1, reference numeral 1 denotes a laminated stator iron core having a plurality of magnetic pole teeth portions 2 whose outer diameters are connected in a ring shape and protrude in the inner diameter direction. A slot 3 is formed between the sections 2, and a slot opening 3 a through which a winding machine nozzle 5 for directly winding a winding 4 a passes is provided on the inner diameter side of the stator core 1. The magnetic pole teeth 2 have a tapered shape that becomes thinner from the outer diameter side 2a to the inner diameter side 2b. Reference numeral 6 denotes an insulator having a uniform thickness on the same surface of the magnetic pole tooth portion 2, and reference numeral 4 denotes a winding portion that is substantially orthogonal via the insulator 6. Reference numeral 6d denotes an insulator protrusion for securing an insulation distance between the magnetic pole tooth tip 2d and the winding 4b.

In the above configuration, the stator core 1 is integrally molded with the insulator 6 or sandwiched from the axial direction, and the winding machine nozzle 5 swings radially through the slot opening 3a. The winding 4a is wound directly around the magnetic pole teeth portion 2 while being wound. At this time, the winding 4a is wound around the inner diameter side portion 2b while being sequentially collapsed by the tapered shape of the magnetic pole teeth portion 2, and the stator is completed.

According to such a stator of the brushless motor of the present invention, the winding 4a is formed by the tapered shape of the magnetic pole teeth 2 which becomes thinner from the outer diameter side 2a toward the inner diameter side 2b. Of the magnetic pole teeth 2, the conductor amount in the inner diameter side 2b of the magnetic pole teeth 2 increases, and the conductor occupancy can be improved.

(Embodiment 2) FIG. 2 is a radial cross-sectional view of a stator of a brushless motor, and the same parts as those of Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. In the figure, reference numeral 7 denotes a laminated stator core having a plurality of magnetic pole teeth 8 whose outer diameters are connected in a ring shape and protrude in the same direction in the inner diameter direction, and 9 denotes a portion between the magnetic pole teeth 8 and the winding 4. Between the outer diameter side portion 9a and the inner diameter side portion 9b.
9d is an insulator protrusion for securing an insulation distance between the magnetic pole tooth tip 8d and the winding 4b, and other configurations are the same as those of the first embodiment. The configuration is the same.

In the above configuration, the stator core 7 is integrally molded with the insulator 9 or sandwiched from the axial direction, and the winding machine nozzle 5 swings radially through the slot opening 3a. The winding 4 a is wound directly around the magnetic pole teeth 8. At this time, the winding 4a is wound around the inner diameter side portion 8b while being sequentially broken by the tapered shape of the insulator 9, thereby completing the stator.

According to such a brushless motor stator of the present invention, the insulator 9 interposed between the magnetic pole tooth portion 8 and the winding portion 4 moves from the outer diameter side 9a to the inner diameter side 9b of the insulator 9. Due to the tapered shape that becomes thin, the winding 4 a
Of the magnetic pole teeth 8, the amount of conductor increases, and the conductor occupancy can be improved.

(Embodiment 3) FIG. 3 is an axial sectional view of a stator of a brushless motor, in which the same parts as those in Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. I do. In the drawing, reference numeral 10 denotes a portion interposed between the magnetic pole tooth portion 8 and the winding portion 4, and the thickness of the stator core 7 on the axial end face 7 a side decreases from the outer diameter side portion 10 a toward the inner diameter side portion 10 b. The other configuration is the same as that of the first and second embodiments.

In the above configuration, the stator core 7 is integrally molded with the insulator 10 or sandwiched from the axial direction, and the winding machine nozzle 5 swings in the radial direction through the slot opening 3a. The winding 4 a is wound directly around the magnetic pole teeth 8. At this time, the winding 4a is wound around the inner diameter side portion 10b while being sequentially collapsed by the tapered shape of the axial end face 7a of the stator core 7 of the insulator 10, thereby completing the stator.

According to such a stator of the brushless motor of the present invention, the insulator 10 interposed between the magnetic pole tooth portion 8 and the winding portion 4 has the outer diameter side of the axial end face 7a of the stator core 7 of the insulator 10. The winding 4a has a tapered shape that becomes thinner from the portion 10a toward the inner diameter side portion 10b.
In this case, the amount of conductor in the inner diameter side portion 8b of the magnetic pole tooth portion 8 is increased, and the conductor occupancy is improved.
Drop can be prevented.

(Embodiment 4) FIG. 4 is a radial cross-sectional view of a stator of a brushless motor, in which the same parts as those in Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. In the figure, reference numeral 11 denotes a laminated stator core having a plurality of magnetic pole teeth portions 12 whose outer diameters are connected in a ring shape and protrude in the inner diameter direction. The magnetic pole tooth portions 12 extend from a central portion 12c to an outer diameter side portion 12a.
And a substantially rhombic shape which becomes thinner toward the inner diameter side portion 12b. 6d is an insulator protrusion for securing an insulation distance between the magnetic pole tooth tip 12d and the winding 4b.
Other configurations are the same as those of the first embodiment.

In the above construction, the stator core 11 is integrally molded with the insulator 6 or sandwiched from the axial direction, and the winding machine nozzle 5 swings radially through the slot opening 3a. The winding 4 a is wound directly around the magnetic pole teeth 12. At this time, the winding 4a is wound around the outer diameter side portion 12a and the inner diameter side portion 12b while being sequentially collapsed by the substantially rhombic shape of the magnetic pole tooth portion 12, thereby completing the stator.

According to such a stator of the brushless motor of the present invention, the winding has a substantially rhombic shape which becomes thinner from the central portion 12c of the magnetic pole tooth portion 12 toward the outer diameter side portion 12a and the inner diameter side portion 12b. 4a is easily rolled from the central portion 12c of the magnetic pole tooth portion 12 to the outer diameter side portion 12a and the inner diameter side portion 12b.
a and the amount of conductor in the inner diameter side portion 12b increases, and the conductor occupancy can be improved.

(Embodiment 5) FIG. 5 is a radial cross-sectional view of a stator of a brushless motor, in which the same parts as those in Embodiments 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. I do. In the figure, reference numeral 13 is interposed between the magnetic pole tooth portion 8 and the winding portion 4, and the thickness facing the slot 3 is the central portion 13c.
Is an approximately mountain-shaped insulator that becomes thinner toward the outer diameter side portion 13a and the inner diameter side portion 13b.
d is an insulator protrusion for ensuring an insulation distance between the magnetic pole tooth tip 8d and the winding 4b, and other configurations are the same as those of the first and second embodiments.

In the above configuration, the stator core 7 is integrally molded with the insulator 13 or sandwiched from the axial direction, and the winding machine nozzle 5 swings in the radial direction through the slot opening 3a. The winding 4 a is wound directly around the magnetic pole teeth 8. At this time, the winding 4a is wound around the outer diameter side portion 8a and the inner diameter side portion 8b while being sequentially collapsed by the substantially mountain shape of the insulator 13, thereby completing the stator.

According to such a stator of the brushless motor of the present invention, the central portion 13c of the insulator 13 interposed between the magnetic pole tooth portion 8 and the winding portion 4 extends from the outer diameter side portion 13a to the inner diameter side portion. 13b, the windings 4a are easily wound around the outer diameter side portion 8a and the inner diameter side portion 8b of the magnetic pole tooth portion 8 by the substantially mountain shape that becomes thinner toward the outer circumference side portion 8a of the magnetic pole tooth portion 8. The conductor amount of the inner diameter side portion 8b increases, and the conductor occupancy can be improved.

(Embodiment 6) FIG. 6 is a sectional view in the axial direction of a stator of a brushless motor, and the same parts as those in Embodiments 1, 2, and 3 are denoted by the same reference numerals, and the details thereof are described. Detailed description is omitted. In the figure, 14 is interposed between the magnetic pole tooth portion 8 and the winding portion 4, and is an axial end face 7 of the stator core 7.
The insulator on the a side is a substantially mountain-shaped insulator whose thickness becomes thinner from the central portion 14c toward the outer diameter side portion 14a and the inner diameter side portion 14b, respectively. The configuration is the same as that of Example 3.

In the above configuration, the stator core 7 is integrally molded with the insulator 14 or sandwiched from the axial direction, and the winding machine nozzle 5 swings radially through the slot opening 3a. The winding 4 a is wound directly around the magnetic pole teeth 8. At this time, the winding 4a is wound from the central portion 14c to the outer diameter side portion 14a and the inner diameter side portion 14b while being sequentially collapsed by the shape of the axial end face 7a of the stator core 7 of the insulator 14 so that the stator is wound. Be completed.

According to such a stator of the brushless motor of the present invention, the central portion 1 of the axial end face 7a of the stator core 7 of the insulator 14 interposed between the magnetic pole tooth portion 8 and the winding portion 4 is provided.
Since the winding 4a is easily tapered around the outer diameter side portion 8a and the inner diameter side portion 8b of the magnetic pole tooth portion 8 due to the tapered shape which becomes thinner from the outer diameter side portion 14a and the inner diameter side portion 14b from the outer diameter side portion 14a. The conductor amounts of the outer diameter side portion 8a and the inner diameter side portion 8b of the tooth portion 8 respectively increase, so that the conductor occupancy can be improved and a decrease can be prevented.

(Embodiment 7) FIG. 7 is a radial sectional view of the magnetic pole teeth of the stator of the brushless motor, and FIG. 8 is a radial sectional view of the stator of the brushless motor. 7 and 8, reference numeral 15 denotes a magnetic pole tooth piece which is divided in the circumferential direction for each magnetic pole tooth part 16 unit and laminated by a required number. The magnetic pole tooth part 16 extends from the outer diameter side part 16a to the inner diameter side part 16b. It has a tapered shape that becomes thinner as it goes. Reference numeral 17 denotes an insulator having a uniform thickness on the same surface of the magnetic pole tooth portion 16;
Is a winding portion that is substantially orthogonal via the insulator 17. 17d
Is an insulator protrusion for ensuring an insulation distance between the magnetic pole tooth tip portion 16d and the winding 4b.

In the above configuration, the magnetic pole tooth piece 15 is integrally molded with the insulator 17 or sandwiched from the axial direction, and the winding 4a is directly wound around the magnetic pole tooth section 16. 4a is wound around the inner diameter side portion 16b while being sequentially collapsed by the tapered shape of the magnetic pole teeth portion 16. The magnetic pole tooth pieces 15 are joined in a ring shape by a predetermined number after winding, and the outer peripheral portion of the joining surface is welded and fixed to complete the stator.

According to such a stator of the brushless motor of the present invention, the winding 4a is formed by the tapered shape of the magnetic pole teeth 16 which becomes thinner from the outer diameter side 16a toward the inner diameter side 16b. Of the magnetic pole teeth 16, the conductor amount of the inner diameter side portion 16b increases, and the conductor occupancy can be improved.

[0052]

As is apparent from the above embodiment, according to the present invention, the winding is formed by the taper shape which becomes thinner from the outer diameter side to the inner diameter side of the magnetic pole tooth portion, so that the winding has the inner diameter of the magnetic pole tooth portion. Since it becomes easy to be rolled around the side, the amount of conductor on the inner diameter side of the magnetic pole teeth increases, and a stator of a brushless motor having an effect of improving the conductor occupancy can be provided.

The winding is wound around the inner diameter side portion of the magnetic pole tooth portion due to the taper shape of the insulator interposed between the magnetic pole tooth portion and the winding portion which becomes thinner from the outer diameter side portion to the inner diameter side portion. Since it easily collapses, the amount of conductor on the inner diameter side portion of the magnetic pole tooth portion increases, and it is possible to provide a brushless motor stator having an effect of improving the conductor occupancy.

Further, the winding has a magnetic pole having a tapered shape which becomes thinner from the outer diameter side to the inner diameter side of the axial end face of the stator core of the insulator interposed between the magnetic pole tooth portion and the winding portion. The brushless motor has the effect of increasing the conductor occupancy on the inner diameter side of the magnetic pole teeth, thereby increasing the conductor occupancy and preventing the lowering, since the inner diameter of the teeth is easily rolled around the inner diameter side of the teeth. Can provide children.

The windings extend from the center of the magnetic pole teeth to the outer diameter side and the inner diameter side, because of the substantially rhombic shape that becomes thinner from the center of the magnetic pole teeth toward the outer diameter side and the inner diameter side. Since the windings are easily broken, the amount of conductors on the outer diameter side and the inner diameter side of the magnetic pole teeth increases, and the stator of the brushless motor has an effect of improving the conductor occupancy. .

Further, the winding is formed in a substantially mountain-like shape which becomes thinner from the central portion of the insulator interposed between the magnetic pole tooth portion and the winding portion toward the outer diameter side portion and the inner diameter side portion. Because it is easy to collapse on the outer diameter side and inner diameter side,
The amount of conductors on the outer diameter side and the inner diameter side of the magnetic pole teeth is increased, so that it is possible to provide a brushless motor stator having the effect of improving the conductor occupancy.

Further, the taper shape which becomes thinner from the center of the axial end face of the stator core of the insulator interposed between the magnetic pole tooth portion and the winding portion toward the outer diameter side portion and the inner diameter side portion, Since the windings easily collapse on the outer diameter side and inner diameter side of the magnetic pole teeth, the amount of conductor on the outer diameter side and inner diameter side of the magnetic pole teeth increases, respectively, improving the conductor occupancy. Thus, it is possible to provide a brushless motor stator having the effect of preventing the lowering.

[Brief description of the drawings]

FIG. 1 is a radial sectional view showing a stator of a brushless motor according to a first embodiment of the present invention.

FIG. 2 is a radial cross-sectional view illustrating a stator of a brushless motor according to a second embodiment of the present invention.

FIG. 3 is an axial sectional view showing a stator of a brushless motor according to a third embodiment of the present invention.

FIG. 4 is a radial sectional view showing a stator of a brushless motor according to a fourth embodiment of the present invention.

FIG. 5 is a radial sectional view showing a stator of a brushless motor according to a fifth embodiment of the present invention.

FIG. 6 is an axial sectional view showing a stator of a brushless motor according to a sixth embodiment of the present invention.

FIG. 7 is a radial cross-sectional view showing magnetic pole tooth pieces of a stator of a brushless motor according to a seventh embodiment of the present invention.

FIG. 8 is a radial cross-sectional view showing a stator of a brushless motor according to a seventh embodiment of the present invention.

FIG. 9 is a radial cross-sectional view showing a stator of a conventional brushless motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Magnetic pole tooth part 2a Magnetic pole tooth part outer diameter side part 2b Magnetic pole tooth part inner diameter side part 2d Magnetic pole tooth part tip part 3 Slot 3a Slot opening part 4 Winding part 4a, 4b Winding 5 Winding machine nozzle 6 Insulator 6a Insulator outer diameter side 6b Insulator inner diameter side 6d Insulator protrusion 7 Stator core 7a Stator core axial end face 8 Magnetic pole teeth 8a Magnetic pole teeth outer diameter side 8b Magnetic pole teeth inner diameter side 8d Magnetic pole tooth tip 9 Insulator 9a Insulator outer diameter side 9b Insulator inner diameter side 9d Insulator protrusion 10 Insulator 10a Insulator outer diameter side 10b Insulator inner diameter side 11 Stator core 12 Magnetic pole teeth 12a Magnetic pole Tooth outer diameter side 12b Magnetic pole tooth inner diameter side 12c Magnetic pole tooth center 12d Magnetic pole tooth tip 13 Insulator 13a Insulator outer diameter side 13b Insulator inner diameter side 13c Insulator center 13d Insulator protrusion 1 4 Insulator 14a Insulator outer diameter side 14b Insulator inner diameter side 14c Insulator center 15 Magnetic pole tooth piece 16 Magnetic pole tooth 16a Magnetic pole tooth outer diameter side 16b Magnetic pole tooth inner diameter side 16d Magnetic pole tooth tip 17 Insulator 17d Insulator protrusion

Claims (7)

[Claims] 1. A stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores. A stator for a brushless motor, comprising: a winding portion that is substantially perpendicular to the magnetic pole, and the magnetic pole tooth portion is tapered so as to become thinner from an outer diameter side toward an inner diameter side. 2. A stator core comprising a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores. A stator for a brushless motor, comprising: a winding portion that is substantially orthogonal, and a taper shape in which a thickness of the insulator facing the slot decreases from an outer diameter side to an inner diameter side. 3. A stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores. A stator for a brushless motor, comprising: a winding portion that is substantially orthogonal, and a tapered shape in which the thickness of the insulator in the axial direction decreases from the outer diameter side to the inner diameter side. 4. A stator core having a plurality of magnetic pole teeth and a plurality of slots, each of which has an outer diameter connected in a ring shape and protruding in an inner diameter direction, and a required number of laminated stator cores. A stator for a brushless motor, comprising: winding portions that are substantially orthogonal to each other, wherein the magnetic pole tooth portions are formed in a substantially rhombic shape so as to become thinner from a predetermined radial position toward an inner diameter side and an outer diameter side. 5. A stator core having a plurality of magnetic pole teeth and a plurality of slots, each having a plurality of magnetic pole teeth protruding in an inner diameter direction and having an outer diameter formed in a ring shape, and a required number of laminated stator cores. A brush portion, wherein the thickness of the insulator facing the slot is made substantially mountain-like so that the thickness of the insulator facing the slot decreases from the predetermined radial position toward the inner diameter side and the outer diameter side. Motor stator. 6. A stator core having a plurality of magnetic pole teeth and a plurality of slots, the outer diameter of which is connected in a ring shape and protruding in the inner diameter direction, and a required number of laminated stator cores. A brushless motor, comprising: a winding portion that is substantially orthogonal to each other, wherein the thickness of the insulator in the axial direction is substantially mountain-shaped so as to become thinner from a predetermined radial position toward an inner diameter side and an outer diameter side. stator. 7. A magnetic pole tooth piece which is circumferentially divided for each magnetic pole tooth unit and laminated by a required number, and a winding part which is substantially orthogonal to said magnetic pole tooth via an insulator, 7. The brushless motor stator according to claim 1, wherein a predetermined number of magnetic pole tooth pieces are annularly joined.