JPH08237897A - Induction motor stator - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a stator for an induction motor that is excellent in ensuring insulation by improving the strength of a winding guide for a direct winding and the quality of a winding. [Structure] A slot insulating paper 1 inserted into a stator core slot 3a having a series winding insulating guide 2 for insulating by tightly fixing a resin material on both end surfaces is a slot insulating paper abutting against the series winding insulating guide 2. By having the bent portion 1a and increasing the width of the insulating guide 2 for direct winding, deformation is prevented and local stress is not applied to the coil 4. Further, by providing the recesses 2a and the holes 2c in the series winding insulating guide 2, the slot insulating paper 1 is prevented from moving, and the coil 4 and the stator core 3 are prevented.
Can be more reliably insulated.

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 small induction motor mainly used for ventilation of buildings such as houses.

[0002]

2. Description of the Related Art In recent years, in induction fans installed in products such as ventilation fans, coils are wound directly around the stator core,
It is required to reduce the size and thickness by providing a winding guide for the direct winding and effectively utilizing the slot area for the winding.

Conventionally, the slot insulating paper of this type of induction motor has generally been constructed as shown in Japanese Patent Publication No. 4-138044. The configuration will be described below with reference to FIGS.
This will be described with reference to 2.

As shown in the figure, a series winding insulating guide 102 is provided on both end surfaces of a stator core 101, a slot insulating paper 103 is inserted into a stator core slot 101a, and a slot insulating paper folded portion 103a is formed on the stator core. Insulation between the coil 104 and the stator core 101 is ensured by contacting both end surfaces of the iron core 101 to prevent the slot insulating paper 103 from moving. The slot insulating paper folded portions 103a are in contact with both ends of the series winding insulating guide 102. The coil 104 is wound above and below the insulation guide 102 for direct winding.

In the above structure, the series winding insulating guide 10
The width Y of the slot insulating paper folding portion 1 is larger than that of the case where the slot insulating paper folding portion 103a is not provided.
The width occupied by the 03a width Z is reduced.

[0006]

In such a conventional stator of an induction motor, the winding tension is applied to the series winding insulation guide 102, and the series winding insulation guide 102 is wound.
Since the width Y of the coil is small, the strength is weak and the coil 104 is easily deformed. Further, the coil 104 is greatly bent on the insulating guide 102 for direct winding, and a strong stress is locally applied to the coil 104, so that there is a problem that the quality is easily deteriorated. .

The present invention solves the above problems, and provides a stator of an induction motor of high quality, in which the insulating guide 102 for series winding has a high strength and is hard to be deformed, and local stress is not applied to the coil 104. The first purpose is to do so.

A second object is to provide a stator of an induction motor in which the slot insulating paper 103 can be fixed more reliably.

[0009]

In order to achieve the above-mentioned first object, the stator of the induction motor of the present invention has a first means, in which a resin material is closely adhered and fixed on both end surfaces for insulation. A stator core having a guide and a slot insulating paper inserted into this slot to insulate the stator core slot are provided, and the slot insulating paper is bent at both end sides thereof for the series winding. The stator of the induction motor is in contact with the insulating guide.

In order to achieve the second object, the second
According to a second aspect of the present invention, there is provided the stator of the induction motor according to the first aspect, wherein the series-wound insulating guide has a recess into which the bent portions on both ends of the slot insulating paper are fitted.

In order to achieve the second object, the third
2. The means of claim 1 has an inner peripheral surface in which the inner peripheral surface of the stator core is extended outward at both ends, and is provided with a cylindrical portion made of a resin material formed on both end surfaces of the stator core. A stator of an induction motor, which comprises a stator core having a series winding insulating guide and slot insulating paper, and a bent portion of the slot insulating paper is inserted into a slot insulating paper fixing hole provided in the cylindrical portion.

[0012]

According to the present invention, when the slot insulating paper is wound by inserting the slot insulating paper into the slot of the stator core by abutting the bent portion of the slot insulating paper on the insulating guide for direct winding by the constitution of the above-mentioned first means. The slot insulating paper bent portion which is in contact with the series winding insulating guide is closely pressed against the coil, and the slot insulating paper is fixed to ensure insulation. By increasing the width of the series winding insulation guide until it extends outside both ends of the stator core, it becomes a series winding insulation guide with high strength and resistance to deformation, and no local stress is applied to the coil. It is possible to provide a stator of a high-quality induction motor and an insulated guide for direct winding in which a slot area for winding a coil does not decrease.

Further, according to the structure of the second means, the bent portion of the slot insulating paper is fitted in the recess of the insulating guide for direct winding, and the folded portion of the slot insulating paper is prevented from moving, so that the entire slot insulating paper moves. It is possible to prevent this from happening and to more reliably maintain the insulation between the coil and the stator core.

According to the structure of the third means, the bent portion of the slot insulating paper is inserted into the slot insulating paper fixing hole provided in the cylindrical portion to prevent the bent portion of the slot insulating paper from moving, thereby insulating the slot insulating paper. Prevents the entire paper from moving,
The insulation between the coil and the stator core can be more reliably maintained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the slot insulating paper folding portion 1a is brought into contact with the series winding insulating guide 2 and the slot insulating paper 1 is inserted into the stator core slot 3a. The slot insulation paper 1 can be easily attached to the stator core slot 3a before winding.
Can be inserted into the slot, but after winding, slot insulation paper folding part 1
a is sandwiched between the coil 4 and the insulating guide 2 for direct winding, and adheres and is fixed. The series-wound insulating guide 2 is extended to the outside of the stator core slot 3a of the stator core 3.

Since the width of the series winding insulating guide 2 can be increased by the above-described structure, the series winding insulating guide 2 having high strength and being hard to be deformed can be formed, and the coil 4 is also less bent on the series winding insulating guide 2. As it can be done, no local stress is applied.

As described above, according to the stator of the induction motor of the first embodiment of the present invention, the strength of the series-wound insulation guide 2 is strong and is hard to be deformed, and local stress is not applied to the coil 4, so that the quality is improved. A good induction motor stator can be provided.

Although the slot insulating paper folded portion 1a has a rectangular shape in the embodiment, it may have any shape such as a semicircular shape, and there is no difference in its function and effect.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. As shown in the figure, the serial winding insulating guide 2 is provided with a serial winding insulating guide recess 2a for preventing the slot insulating paper folding portion 1a from moving.
Before winding, the slot insulating paper 1 is the stator core slot 3a.
The slot insulating paper folding portion 1a can also be easily inserted into the slot, and the slot insulating paper folding portion 1a is also fitted in the direct winding insulating guide recess 2a.

When the winding is performed by the above-mentioned structure, even if the coil 4 exerts a force to move to the slot insulating paper folding portion 1a, the slot insulating paper folding portion 1a is fixed by the recessed portion 2a of the direct winding insulation guide. The slot insulating paper 1 also does not move.

As described above, according to the series winding insulation guide 2 of the second embodiment of the present invention, the insulation between the coil 4 and the stator core 3 can be made more reliable.

Next, a third embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in the figure, the stator core 3 has an inner peripheral surface having inner peripheral surfaces extending outward from both ends, and a series winding insulation guide made of a resin material formed on both end surfaces of the stator core. Tube 2b
A slotted insulating guide hole 2c for preventing the slot insulating paper folded portion 1b from moving is provided in the slot. Before the winding, the slot insulating paper 1 can be easily inserted into the stator core slot 3a, and the slot insulating paper bent portion 1c can be inserted into the direct winding insulating guide hole 2c.

Even if the winding is carried out by the above-mentioned structure, the slot insulating paper folding portion 1b is inserted and fixed in the direct winding insulating guide hole 2c, so that the slot insulating paper 1 also does not move.

As described above, according to the insulation guide for direct winding of the third embodiment of the present invention, the insulation between the winding and the iron core can be made more reliable.

[0028]

As is apparent from the above-described embodiments, according to the present invention, the width of the insulating guide for series winding can be increased without reducing the slot area. It is possible to provide a stator of an induction motor of good quality without applying local stress.

Further, by providing a concave portion or a hole in the straight-winding insulating guide capable of fixing the slot insulating paper and abutting or inserting the folded portion of the slot insulating paper, the induction motor having a more reliable insulating performance can be obtained. A stator can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a slot insulating paper according to a first embodiment of the present invention.

FIG. 2 is a front view of a stator before winding of the first and second embodiments.

FIG. 3 is a sectional view taken along the line A-A ′ of the first embodiment after winding.

FIG. 4 is a perspective view of an insulating guide for series winding of the second embodiment.

FIG. 5 is a sectional view taken along the line B-B ′ before winding in the second embodiment.

FIG. 6 is a sectional view taken along the line A-A ′ of the second embodiment after winding.

FIG. 7 is a perspective view of a slot insulating paper according to the third embodiment.

FIG. 8 is a front view of a stator before winding of the third embodiment.

FIG. 9 is a view on arrow C of the insulated guide for series winding of the third embodiment.

FIG. 10 is a front view of a conventional stator before winding.

FIG. 11 is a sectional view taken along the line X-X ′ after the winding.

FIG. 12 is a perspective view of the slot insulating paper.

[Explanation of symbols]

 1 slot insulating paper 1a slot insulating paper folding part 1b slot insulating paper folding part 2 series winding insulating guide 2a series winding insulating guide recess 2b series winding insulating guide tube part 2c series winding insulating guide hole 3 stator core 3a fixed Sub-iron core slot 4 Coil 101 Stator iron core 101a Stator iron core slot 102 Insulation guide for direct winding 103 Slot insulating paper 103a Slot insulating paper folding part 104 Coil

Claims (3)

[Claims] 1. A stator core having a series-winding insulating guide for insulating by tightly fixing a resin material on both end faces, and a slot insulating paper inserted into this slot to insulate the stator core slot. The stator of the induction motor, wherein the slot insulating paper is bent at both end sides thereof and abuts on the series winding insulating guide. 2. The stator for an induction motor according to claim 1, wherein the insulation guide for direct winding has a recess into which the bent portions on both ends of the slot insulating paper are fitted. 3. A cylindrical portion made of a resin material formed on both end surfaces of the stator core, the inner core surface of the stator core extending outward from both ends of the stator core. A stator of an induction motor, comprising a stator core having an insulating guide for series winding, and slot insulating paper, wherein a bent portion of the slot insulating paper is inserted into a slot insulating paper fixing hole provided in the cylindrical portion.