JP2003111329A - Stator for rotating electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for rotating electric machine capable of improving reliability by restraining the cross section of a magnetic path from decreasing, thus preventing an output from lowering. SOLUTION: A pair of stepped sections each having a prescribed length and level difference are formed respectively inward from both-end sides in the thickness direction of each of surfaces of the inside of a protrusion of a magnetic teeth section 12 and the inside of the magnetic pole teeth section 12 and a yoke section 11. The length of each of insulating winding frames 14, 15 in the thickness direction is fitted to the length of the stepped section, and the insulating winding frames 14, 15 are inserted into the stepped sections. On both sides thereof between the pair of insulating winding frames 14, 15, both ends are respectively formed with a pair of insulating films 16, being affixed onto the surfaces of the pair of insulating winding frames 14, 15 and stretched between the pair of insulating winding frames 14, 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator of a rotary electric machine in which a coil is wound around each magnetic pole teeth of a stator iron core through an insulating winding frame, and the insulating winding frame is interposed. The present invention relates to a structure for preventing the magnetic path cross section from being suppressed by.

[0002]

2. Description of the Related Art A stator of a conventional rotary electric machine of this kind, which is disclosed in, for example, Japanese Patent Laid-Open No. 2000-139052, is constructed as described below. That is, as shown in FIG. 10, the yoke portion 1 is formed by stacking plate-like magnetic members to have a predetermined thickness and forming the connecting portions 1a and 1b at both ends.
Although not shown, a plurality of iron core members 3 composed of a magnetic pole teeth portion 2 which is formed so as to project on the inner surface of the yoke portion 1 and has protrusions 2a on both sides of the tip are provided at both connecting portions 1
By connecting via a and b to form a ring,
The stator core is constructed.

Then, from both sides in the thickness direction of the magnetic pole teeth portion 2, the inner surface of the protruding portion 2a of the magnetic pole teeth portion 2 and the inside of the yoke portion 1 are formed at both ends in the protruding direction of the magnetic pole teeth portion 2 in a U-shaped cross section. The pair of insulative winding frames 4 having a pair of flange portions 4a and 4b that come into contact with the surface of the magnetic pole teeth portion 2 are projected on the surface of the magnetic pole teeth portion 2 by inserting and inserting the pair of insulating winding frames 4 as shown by arrows in the figure. Part 2a
Covers the inner surface of the and the inner surface of the yoke portion 1,
A stator is formed by winding a coil (not shown) around the coil.

[0004]

Since the stator of the conventional rotating electric machine is constructed as described above and the magnetic pole teeth portion 2 is covered with the U-shaped portion of the insulating winding frame 4 as shown in FIG. As is clear from the figure, the width W ₁ of the magnetic pole teeth portion 2 forming the magnetic path is reduced by twice the thickness 2 · t of the U-shaped portion of the insulating winding frame 4, so that There is a problem that reliability is deteriorated because the magnetic path cross section is reduced by that amount, a predetermined amount of magnetic flux cannot be generated, and the output is reduced.

The present invention has been made in order to solve the above problems, and it is possible to prevent the output from decreasing by suppressing the reduction of the cross section of the magnetic path and to improve the reliability. It is an object of the present invention to provide a stator of a rotating electric machine capable of

[0006]

A stator of a rotary electric machine according to claim 1 of the present invention has a yoke portion having a predetermined thickness and formed in an annular shape, and a predetermined interval on an inner surface of the yoke portion. A stator core consisting of a magnetic pole teeth portion having a protruding portion protruding in the circumferential direction of the yoke portion at the tip and protruding from the stator core, and each magnetic pole teeth portion formed in a U-shaped cross-section with each magnetic pole teeth portion from both ends in the thickness direction. A pair of insulating parts that are fitted so as to cover each other and that have a pair of flange portions that respectively cover the inner surface of the protruding portion of the magnetic pole teeth portion and the inner surface of the yoke portion at both ends in the protruding direction of the magnetic pole teeth portion. In a stator of a rotating electric machine comprising a winding frame and a coil wound around each pair of insulating winding frames, the inside of the protruding portion of the magnetic pole teeth portion, the magnetic pole teeth portion, and the yoke. A pair of step portions having a predetermined length and a step is formed inward from both ends in the thickness direction on each part of each inner surface of the insulative winding frame, and the length in the thickness direction of each insulative bobbin is stepped. The insulating bobbin is fitted to the step according to the length of the part, and both ends are pasted on the surface of the pair of insulative bobbin on both sides between each pair of the insulative bobbin. This is provided with a pair of insulating films stretched between the reels.

According to a second aspect of the present invention, there is provided a stator for a rotary electric machine according to the first aspect, wherein a thickness of a portion of the insulating winding frame fitted into the step portion is formed to have the same dimension as a step of the step portion. It was done.

According to a third aspect of the present invention, there is provided a stator for a rotary electric machine according to the first or second aspect, wherein the protrusion of the magnetic pole teeth portion and the step portion of each surface inside the yoke portion are
It is formed such that a part thereof is left in the protruding direction of the protruding portion of the magnetic pole teeth portion and the circumferential direction of the yoke portion on each surface.

According to a fourth aspect of the present invention, there is provided a stator for a rotary electric machine according to the first aspect, wherein the yoke portion is formed of a plurality of yoke members connected through bendable connecting portions. The magnetic pole teeth portion is formed so as to project on the inner surface of the member, and the insulating film is formed so as to extend further outward from the protruding portion of the magnetic pole teeth portion and the end portion in the connecting direction of the yoke member. is there.

A stator of a rotating electric machine according to a fifth aspect of the present invention is the stator according to any one of the first to fourth aspects, in which a polyester film is applied as the insulating film.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a front sectional view showing the structure of a stator of a rotary electric machine according to Embodiment 1 of the present invention, and FIG.
2 is a perspective view showing the structure of the main part of the stator in FIG.
2 is a perspective view showing a part of a stator core that constitutes a main part of the stator in FIG. 4, FIG. 4 is a perspective view showing a pair of insulating winding frames that constitutes a main part of the stator in FIG. 2, and FIG. 6 is a cross-sectional view showing the structure of the main part of the stator in FIG. 6, and FIG. 6 is a perspective view showing the assembly process of the main part of the stator in FIG.

In the figure, reference numeral 11 denotes a yoke portion formed by connecting a plurality of yoke members 11a having a predetermined thickness in an annular shape through connecting portions (not shown).
Reference numeral 2 denotes a magnetic pole teeth portion formed so as to project on the inner surface of each yoke member 11a of the yoke portion 11 and having a protruding portion 12a formed at the tip thereof so as to protrude in the circumferential direction of the yoke portion 11, and 13 denotes each yoke member. Inner surface of 11a, both surfaces of each magnetic pole tooth portion 12, and protruding portion 1
2a is a step portion formed inward from both ends in the thickness direction of the inner surface of 2a with a predetermined length L and a step h, and the stator core 20 is constituted by these 11 to 13.

Body portions 14 and 15 are formed in a U-shaped cross section, respectively, and body portions 14a and 15a fitted into the step portion 13 so as to cover the magnetic pole teeth portion 12 and the body portions 14 respectively.
a, 15a on both ends in the protruding direction of the magnetic pole teeth portion 12,
Each protruding portion 12a and each step portion 13 of the yoke member 11a
Is formed so as to protrude to a length corresponding to the length L of
A pair of flange portions 14b, 14c and 15b for covering the inner surfaces of the protruding portion 12a and the yoke member 11a,
Insulating bobbin 15c is formed between the insulative bobbin 14 and 15, both ends of which are pasted on the surface of the insulative bobbin 14 and 15, respectively. A pair of insulating films stretched along the remaining surface existing between the tooth portion 12 and the step portion 13 inside the yoke member 11a, for example, a polyester film having a thickness of 0.113 mm is applied.

The two insulating reels 14 and 15 and the insulating film 16 are incorporated into the stator core 20 as described below. First, as shown in FIG. 6 (A), each magnetic pole teeth portion 12 is provided with both insulating winding frames 14 and 15.
Is inserted in the direction shown by the arrow in the figure, and the protruding portion 12a, the magnetic pole teeth portion 12 and each step portion 13 of the yoke member 11a are inserted.
6B, the both insulating films 16 are inserted from the direction shown by the arrow in the figure, and both ends of the body 14a of the insulating reels 14, 15 are inserted. It adheres to 15a and both flange parts 14b, 14c, 15b, and 15c by ultrasonic welding etc., for example. Then, finally, the coil 17 is wound from the outside of both the insulating reels 14 and 15 and the insulating film 16, and the stator 30 of the rotating electric machine shown in FIG.
Is completed.

As described above, according to the first embodiment, the magnetic pole teeth portion 12 of the stator core 20 and the protruding portion 1 thereof.
A pair of step portions 13 having a predetermined length L and a step h are formed inward from both ends in the thickness direction of the inner surfaces of 2a and the inner surface of the yoke member 11a.
The length L of 3 is matched with the length of the portion of the insulating reels 14 and 15 which is fitted into the stepped portion 13, and both ends of the insulating reels 14 and 15 have insulating reels 14 on both sides. 15 is applied to the surface of the magnetic pole teeth portion 1 inside the protruding portion 12a.
2 and the pair of insulating films stretched along the remaining surface between the step portions 13 on the inner side of the yoke member 11a, the magnetic path is reduced as is apparent from FIG. Is only the portion where the step portion 13 is formed, and the step h is, for example, about 0.5 mm.
Since the thickness of can be neglected at only 0.113 mm,
Since it is possible to prevent the cross section of the magnetic path from being reduced, it is possible to prevent a decrease in output and improve reliability.

Further, since a tough polyester film having excellent electric characteristics is used as the insulating film 16, the thickness thereof can be made thinner and the cross section of the magnetic path can be suppressed from being reduced. be able to.

Although not described in the above configuration, as shown in FIG. 5, the thickness of the portion of the insulating winding frames 14 and 15 fitted into the step portion 13 is the same as the step h of the step portion 13. If formed so as to have dimensions, the outer surfaces of the insulating reels 14 and 15 to which the insulating film 16 is applied and the protruding portion 12 are formed.
Inside of a, magnetic pole teeth portion 12 and yoke member 11a
Since the remaining surface existing between the stepped portions 13 on the inside is the same surface, work such as ultrasonic welding is facilitated, and assembling workability can be improved.

Embodiment 2. FIG. 7 is a perspective view showing a part of a stator core that constitutes a main part of a stator of a rotary electric machine according to Embodiment 2 of the present invention. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Reference numeral 19 has a predetermined length L and a step h inward from both ends in the thickness direction of the inner surface of the yoke portion 11a, the surface of the magnetic pole teeth portion 12, and the inner surface of the protruding portion 12a of the magnetic pole teeth portion 12. The stepped portion is formed by forming a part of each surface in the circumferential direction of the yoke portion 11 and in the protruding direction of the protruding portion 12a at each portion inside the yoke member 11a and the protruding portion 12a. .

As described above, according to the second embodiment, the protruding portion 12a of the magnetic pole teeth portion 12 and the yoke portion 1 are provided.
Since the step portion 19 on each surface inside 1a is formed while leaving a part in the protruding direction of the protruding portion 12a of each surface and the circumferential direction of the yoke portion 11, the cross section of the magnetic path is reduced. Since it can be further suppressed, it is possible to prevent a decrease in output and further improve reliability.

Embodiment 3. 8 is a front sectional view showing a structure of a main part of a stator of a rotary electric machine according to Embodiment 3 of the present invention, and FIG. 9 is a front sectional view showing one step of assembling the stator in FIG. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 21 is a yoke portion formed by connecting a plurality of yoke members 21a having a predetermined thickness in an annular shape via a bendable connecting portion 21b made of, for example, a thin member or a pin member. Is a magnetic pole teeth portion which is formed so as to project from the inner surface of each yoke member 21a of the yoke portion 21 and has a protruding portion 12a formed at the tip thereof so as to protrude in the circumferential direction of the yoke portion 21. Similar to each of the first and second embodiments, the inner surface of each yoke member 21a, both surfaces of each magnetic pole teeth portion 22 and the inner surface of the protruding portion 22a have a predetermined length inward from both ends in the thickness direction. And a step portion having a step is formed.

Further, the magnetic pole teeth portion 2 is provided on this step portion.
A pair of insulative winding frames are fitted so as to respectively cover the surface of the second portion, the protruding portion 22a and the inner surface of the yoke member 21a, and a pair of insulating films 23 are stretched between these insulative winding frames. As shown in FIG. 9, the insulating film 23 is provided with extending portions 23a that extend further outward than the protruding portions 22a and the end portions of the yoke member 21a in the connecting direction. 21
After the coil 17 is wound in the reverse warped state shown in FIG. 9 by bending the connecting portion 21b of FIG. 9, the extending portion 23a is moved to the coil 17 with the yoke portion 21 returned to its original state as shown in FIG. It is configured to cover the outer surface.

As described above, according to the third embodiment, the connecting portion 21a of the yoke portion 21 can be bent, and
The extending portion 23a is formed outside the insulating film 23 stretched between the insulating winding frames, and the coil 17 is formed by the extending portion 23a.
Since the outer surface of the is covered, the insulating property can be improved, and the reliability can be further improved.

[0024]

As described above, according to the first aspect of the present invention, the yoke portion having a predetermined thickness and formed in an annular shape, and the inner surface of the yoke portion are formed so as to project at a predetermined interval. The stator core is composed of a magnetic pole teeth portion having a protruding portion protruding in the circumferential direction of the yoke portion at the tip, and each magnetic pole teeth portion formed in a U-shaped cross section covers each magnetic pole teeth portion from both ends in the thickness direction. A pair of insulating reels that are fitted and formed with a pair of flange portions that respectively cover the inner surface of the protruding portion of the magnetic pole teeth portion and the inner surface of the yoke portion at both ends in the protruding direction of the magnetic pole teeth portion. In a stator of a rotating electric machine including coils wound around a pair of insulating winding frames, inside surfaces of a protruding portion of a magnetic pole teeth portion, inside surfaces of a magnetic pole teeth portion, and a yoke portion. A pair of step portions having a predetermined length and a step is formed inward from both ends in the thickness direction on one part of each, and the length in the thickness direction of each insulating reel is adjusted to the length of the step portion. The insulating reel is inserted into the stepped portion, and both ends are pasted on the surface of the pair of insulating reels on both sides between each pair of insulating reels and stretched between the pair of insulating reels. Provided with a pair of insulating films, a stator of a rotating electric machine capable of preventing reduction in output by suppressing reduction of the cross section of the magnetic path and improving reliability. can do.

According to a second aspect of the present invention, in the first aspect, the thickness of the portion to be inserted into the step portion of the insulating reel is formed to have the same size as the step of the step portion. It is possible to provide a stator of a rotary electric machine that can improve the property.

According to a third aspect of the present invention, in the first or second aspect, the protruding portion of the magnetic pole teeth portion and the step portion of each surface inside the yoke portion are replaced by the protruding portions of the magnetic pole teeth portion of each surface. Since it is formed so as to leave a part in the protruding direction and the circumferential direction of the yoke part, further reduction of the cross section of the magnetic path is prevented to prevent a decrease in output and improve reliability. It is possible to provide a stator of a rotating electric machine capable of performing the above.

According to a fourth aspect of the present invention, in the first aspect, the yoke portion is formed of a plurality of yoke members connected via bendable connecting portions, and the inner surface of each yoke member is formed. The magnetic pole teeth portion is formed so as to project respectively, and the insulating film is formed so as to extend further outward from the protruding portion of the magnetic pole teeth portion and the end portion in the connecting direction of the yoke member. It is possible to provide a stator of a rotating electric machine that can further improve reliability.

Further, according to claim 5 of the present invention, in any one of claims 1 to 4, since the polyester film is applied as the insulating film, it is possible to further suppress the reduction of the cross section of the magnetic path. As a result, it is possible to provide the stator of the rotating electric machine that can prevent the output from decreasing and improve the reliability.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a structure of a stator of a rotary electric machine according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of a stator shown in FIG.

FIG. 3 is a perspective view showing a part of a stator core that constitutes a main part of the stator in FIG.

FIG. 4 is a perspective view showing a pair of insulative winding frames that form a main part of the stator in FIG.

5 is a cross-sectional view showing a configuration of a main part of the stator in FIG.

6 is a perspective view showing an assembling process of main parts of the stator in FIG. 1. FIG.

FIG. 7 is a perspective view showing a part of a stator core that constitutes a main part of a stator of a rotary electric machine according to Embodiment 2 of the present invention.

FIG. 8 is a front sectional view showing a configuration of a main part of a stator of a rotary electric machine according to a third embodiment of the present invention.

9 is a front sectional view showing a step of assembling the stator in FIG.

FIG. 10 is a perspective view showing an iron core member and an insulative winding frame which form a main part of a stator of a conventional rotating electric machine.

11 is a cross-sectional view showing the main parts of the stator in FIG.

[Explanation of symbols]

11, 21 yoke part, 11a, 21a yoke member,
21b Connection portion, 12, 22 Magnetic pole teeth portion, 12
a, 22a Projection, 13, 19 Steps, 14, 1
5 Insulating reels, 14a, 15a Body, 14b, 15
b, 14c, 15c Flange part, 16, 23 Insulating film, 23a Extension part, 20 Stator core, 30
Stator, L length, h step.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor ▲ Taka ▼ Keiji I             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. (72) Inventor Miyake Nobuaki             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F-term (reference) 5H002 AA03 AA06 AB01 AE06 AE07                       AE08                 5H603 AA01 AA04 AA09 BB01 BB02                       BB12 CA01 CA05 CB02 CB03                       CB26 CC11 CC17 CD01 CD04                       CD21 CE01 FA02 FA26                 5H604 AA08 BB01 BB03 BB14 CC01                       CC05 CC16 DA16 DB01 DB26                       PB03                 5H615 AA01 BB01 BB02 BB14 PP01                       PP07 PP08 PP12 PP13 QQ02                       QQ19 RR02 SS11 TT36

Claims (5)

[Claims] 1. A yoke portion having a predetermined thickness and formed in an annular shape, and a protruding portion projecting at a predetermined distance on an inner surface of the yoke portion and protruding at a tip end in the circumferential direction of the yoke portion. A stator core made of magnetic pole teeth portions and a U-shaped cross-section, which are inserted into the magnetic pole teeth portions so as to cover the magnetic pole teeth portions from both ends in the thickness direction, and A pair of insulative winding frames formed with a pair of flange portions respectively covering the inner surface of the protruding portion of the magnetic pole teeth portion and the inner surface of the yoke portion on both ends in the projecting direction; In a stator of a rotating electric machine including a coil wound around a frame, the surface of each of the inside of the protruding portion of the magnetic pole teeth portion, the inside of the magnetic pole teeth portion, and the inside of the yoke portion. A pair of step portions having a predetermined length and a step is formed inward or inward from both ends in the thickness direction, and the length in the thickness direction of each insulating winding frame is set to The insulating reel is fitted into the stepped portion in accordance with the length, and both ends of the pair of insulating reels are pasted on the surface of the pair of insulating reels on both sides between the pair of insulating reels. A pair of insulating films stretched between the insulating winding frames of 1., and a stator of a rotating electric machine. 2. The stator of a rotary electric machine according to claim 1, wherein a thickness of a portion fitted into the step portion of the insulating winding frame is formed to have the same size as a step of the step portion. 3. The protruding portions of the magnetic pole teeth portion and the stepped portions on the inner surfaces of the yoke portion are partially left in the protruding direction of the protruding portions of the magnetic pole teeth portion of the respective surfaces and in the circumferential direction of the yoke portion. The stator for a rotating electric machine according to claim 1 or 2, wherein the stator is formed as follows. 4. The yoke portion is formed of a plurality of yoke members that are connected to each other via a bendable connecting portion, and magnetic pole teeth portions are formed so as to project on the inner surface of each of the yoke members. The stator of a rotary electric machine according to claim 1, wherein the film is formed so as to further extend outward from the protruding portion of the magnetic pole teeth portion and the end portion in the connecting direction of the yoke member. 5. The stator for a rotating electric machine according to claim 1, wherein the insulating film is a polyester film.