JP2961333B2 - Motor core and stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the structure of an iron core and a stator used in a motor such as a single-phase induction motor.

[0002]

2. Description of the Related Art FIG. 4 is a plan view of a conventional stator 1. As shown in FIG. The stator 1 includes an auxiliary coil 2, a main coil 3 and an iron core 4. The iron core 4 is made of a metal material such as iron, and is formed with slots 5 extending in the radial direction at predetermined intervals in the circumferential direction in an annular band-like body.
And a plurality of projections 7 extending inward in the radial direction at predetermined intervals in the circumferential direction from the ring portion 6. This projection 7
Is configured to include a belt-shaped main body 8 and an opposing portion 10 that protrudes at both ends in the circumferential direction at the distal end portion of the main body 8 and opposes a rotor 9 disposed inside the stator 1. For such a stator 1, the main coil 3 is wound for every other projection 7 and the auxiliary coil 2 is wound for each projection 7 between the projections 7 around which the main coil 3 is wound. You.

[0003]

In such a conventional stator 1, when winding the coils 2 and 3 around the projections 7, it is necessary to wind them around every other projection 7 as described above. In addition, there is a problem that the length of the coils 2 and 3, that is, the coil end becomes excessively large, resulting in an increase in the size of the configuration and an increase in cost.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a motor stator whose construction is greatly simplified.

[0005]

According to a first aspect of the present invention, an iron core of a motor is formed by stacking a plurality of ring-shaped iron core plates, and is used for winding a main coil and an auxiliary coil.
An iron core of the stator, having a plurality of teeth extending radially inward at equal intervals in a circumferential direction of a ring constituting an outer peripheral portion of the iron core plate, wherein the teeth are formed of a ring. A support base extending radially inward from the peripheral portion, and a pair of connecting pieces extending substantially circumferentially on both sides from the distal end of the support base,
It has a pair of extending portions each extending substantially inward in the radial direction from the distal end portions of the pair of connecting pieces, and a pair of opposing portions extending in the circumferential direction from the distal end portions of the pair of extending portions and approaching each other.
When the auxiliary coil is wound around one support base,
Storage space for the auxiliary coil between the inner circumference of the
Formed between the main coil and the adjacent tooth extension
When wound around the main coil between the connecting piece and the facing part
By forming a storage space, the main coil and auxiliary coil
Can be insulated independently by connecting pieces .

A motor stator according to a second aspect of the present invention has a first projection extending radially inward from between adjacent teeth.

According to a third aspect of the present invention, the motor core has a second protrusion extending radially inward from the tip of the support base.

According to a fourth aspect of the present invention, in the motor core, the main coil is wound between the extending portions of the adjacent teeth in the iron core of the first aspect, and the auxiliary coil is wound around the support base of each tooth. Is what is done.

[0009]

The iron core according to the present invention has a plurality of teeth extending radially inward at equal intervals in a circumferential direction of a ring constituting an outer periphery of the iron core plate, and the teeth are formed of a ring. A support base extending radially inward from the inner periphery of the support base;
A pair of connecting pieces extending substantially in the circumferential direction on both sides from the distal end of the support base, a pair of extending parts each extending substantially inward in the radial direction from the distal end of the pair of connecting pieces, and And a pair of opposing portions extending in a direction close to each other along the direction.

[0010] The main coil is wound around the iron core between the extending portions of the adjacent teeth, and the auxiliary coil is wound around the support base of each tooth.

That is, the main coil is sequentially wound around the extending portion adjacent in the circumferential direction, and the auxiliary coil is sequentially wound around the support base.

Thus, the main coil and the auxiliary coil can be wound in the shortest distance along the circumferential direction without lowering the magnetic flux density distribution of the air gap of the first and auxiliary coils than in the conventional example. Further, the main coil and the auxiliary coil are independent of each other by the connecting piece, so that both the coils can be completely insulated, and further, the configuration can be simplified.

[0013]

1 is a plan view of an iron core plate 11 according to an embodiment of the present invention, FIG. 2 is a plan view of a stator 12, and FIG. 3 is a perspective view of a part of the stator 12.

The stator 12 of the present embodiment is used for an induction single-phase motor as an example, and includes a main coil 13, an auxiliary coil 14, and an iron core.

As shown in FIG. 1, the iron core around which the coil is wound is formed by stacking a plurality of iron core plates 11 formed by stamping a single metal plate into a predetermined shape.

The iron core plate 11 has an annular ring portion 15, which is disposed radially inward of the ring portion 15 at an angle θ 1 in the circumferential direction, and has a length L 1 extending radially inward. For example, six first projections 16 are formed.

The teeth 17 are arranged between the first projections 16. These six teeth 17
A support base 18 having a length L2, which is shorter than the first protrusion 16 and extends inward in the radial direction; a pair of connecting pieces 19 and 20 which are connected to the distal end of the support base 18 and extend on both sides in the circumferential direction;
The first projections 16 on both sides adjacent to the teeth 17 are directed radially inward from the tips of the pair of connecting pieces 19 and 20.
A pair of extending portions 21 and 22 extending inward in the radial direction along the first protrusions at the closer positions;
A pair of opposing portions 23 and 24 extending in a direction close to each other along the circumferential direction from the radially inner end of the support base 18;
And second projections 25 each having a length L3 extending inward in the radial direction and connected to the distal end of the second projection.

The sum L2 + L3 of the lengths of the support base 18 and the second projection 25 is selected to be equal to the length L1 of the first projection 16.

In this embodiment, for example, six windings each composed of the first projection 16, the extending portion 21 of the tooth portion 17 on one side in the circumferential direction, and the extending portion 22 of the tooth portion 17 on the other side in the circumferential direction. The main coil 13 is wound around each of the attachment portions 28, and the auxiliary coil 14 is wound around the six support bases 18 of each tooth portion 17. That is, in this embodiment, the main coil 13 forms six poles in the circumferential direction, and the auxiliary coil 14
Also form six poles between the poles of the main coil 13.

In manufacturing the stator 12, first, a metal disk is punched out by press working to form an iron core plate 11 having a shape shown in FIG. A plurality of the iron core plates 11 are stacked to form an iron core actually used for a motor. An insulator is made of a synthetic resin material on this iron core, and the main coil 13 and the auxiliary coil 1 are formed.
4 and then the whole is molded with a synthetic resin material.

Such a stator 12 has the following effects.

1 The main coil 13 is wound around all of the winding portions 28 that are adjacent in the circumferential direction, and the auxiliary coil 14 is also wound around all of the support base portions 18 that are adjacent in the circumferential direction. Therefore, as described in the section of the prior art, the coils 2, 3
Is prevented from being wound around every other protrusion 7 in the circumferential direction, the length of each coil end and the coils 13 and 14 can be shortened, and the configuration can be significantly simplified as compared with the conventional example.

2 Main coil 13 and auxiliary coil 14
Are molded and electrically insulated from each other as described above. Thereby, the electrical reliability of the manufactured motor is remarkably improved.

3 The main coil 13 is disposed radially inward of the auxiliary coil 14. Therefore, the main coil 13 faces the rotor 29 on the radially inner side of the stator 12, and the excitation characteristics of the obtained motor are remarkably improved.

4. The first protrusions 16 and the second protrusions 25 improve the magnetic flux distribution and make the output wave closer to a sine wave.

[0026]

As described above, in the iron core according to the present invention, the main coil is sequentially wound around the extending portion adjacent in the circumferential direction, and the auxiliary coil is mounted on the support base on the radially outer side of the main coil. It is wound. Thus, the first and auxiliary coils can be wound in the shortest distance along the circumferential direction without lowering the magnetic flux density distribution in the circumferential direction of the main coil and the auxiliary coil than in the conventional example. In addition, the main coil and the auxiliary coil are independent, so that both coils can be completely insulated, and the configuration can be simplified.

Further, the first protrusion improves the magnetic flux distribution and makes it closer to a sine wave.

Further, the magnetic flux distribution is improved by the second projection, and the distribution can be made closer to a sine wave.

[Brief description of the drawings]

FIG. 1 is a plan view of an iron core plate 11 according to one embodiment of the present invention.

FIG. 2 is a plan view of a stator 12 according to one embodiment of the present invention.

FIG. 3 is a perspective view of a part of the stator 12;

FIG. 4 is a plan view of a conventional stator 1;

[Explanation of symbols]

 11 Iron core plate 12 Stator 13 Main coil 14 Auxiliary coil 16 First projection 17 Teeth portion 18 Support base portion 21, 22 Extension portion 23, 24 Opposing portion 25 ... second protrusion 28 ... wrapped part

Continuation of front page (56) References JP-A-58-201551 (JP, A) JP-A-63-110928 (JP, A) JP-A-4-79738 (JP, A) JP-A-4-125049 (JP) , A) Patent 127167 (JP, C2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 1/00-1/34 H02K 17/08

Claims (4)

(57) [Claims] 1. A motor for winding a main coil and an auxiliary coil formed by stacking a plurality of ring-shaped iron core plates .
A stator core having a plurality of teeth extending radially inward at equal intervals in a circumferential direction of a ring constituting an outer peripheral portion of the iron core plate; A support base extending radially inward from the peripheral portion, a pair of connecting pieces extending substantially circumferentially on both sides from a distal end of the support base, and a pair of connecting pieces extending substantially radially inward from the distal ends of the pair of connecting pieces, respectively. when possess the extending portion, and a pair of opposed portions extending in a direction close to each other along the distal end portion of the pair of elongated portions in the circumferential direction, by winding an auxiliary coil on the one support base, ring
Form the storage space for the auxiliary coil between the inner circumference of the
And the main coil was wound between the extensions of the adjacent teeth
In this case, a space for storing the main coil is provided between the connecting piece and the facing part.
By forming, the main coil and auxiliary coil are insulated independently by connecting pieces
An iron core for a motor that has been made possible . 2. The motor core according to claim 1, further comprising a first projection extending radially inward from between adjacent teeth. 3. The motor core according to claim 1, further comprising a second projection extending radially inward from a tip of the support base to between the pair of opposed portions. 4. The iron core of a motor according to claim 1, wherein a main coil is wound between extending portions of adjacent teeth portions, and an auxiliary coil is wound around a support base of each tooth portion. Motor stator to do.