JPS59117434A - Rotating electrical machine slot insulator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a slot insulator installed in a slot provided in a stator core of a rotating electric machine.

[Prior art]

The slot insulator installed in the slot provided in the stator core of a rotating electric machine must have mechanical strength and electrical properties that will not be damaged during automatic installation of the slot insulator itself into the slot and during coil insertion. It is necessary to be excellent.

Generally, those made of polyester film are used for the A-B types of suro and soto products, and the second type is made of polyamide paper,
A material made by laminating FCTD polyamide paper and polyester film is used.

In addition, with this type of slot insulator, in order to prevent the ends of the insulator from tearing when inserting the coil, and to prevent the insulator inserted into the slot of the stator core from moving in the axial direction,
A cuff portion is formed at the end of the insulator. Generally, in order to make the cuff part easier to form, cuffs made of a single piece of insulating material are more commonly used than those made of a plurality of layers of insulating material.

On the other hand, mechanical windings are concentric windings and are generally inserted in several parts. Therefore, the coil inserted the first time is pressed against the coils inserted the second and third times, and the cuff formed at the end of the insulator is widened. Additionally, the insulator may be pressed against the edges of the stator core and may be damaged.

These problems can be solved by increasing the overall thickness of the slot insulation.
；Failure that becomes smaller and decreases the characteristics of the rotating electrical machine≠
There are 2.

Next, Fig. 1 to Fig. 6 show the color 4 of conventional slot insulators.
Here is an example.

The figure shown in Figures 1 and 2 shows slot insulators that are often used in machine-wound coils. The cuff part A is formed by bending the cuff part A into the cuff part.

This slot insulator is automatically installed into the 1vilJ slot. And the cuff part l
This strengthens the mechanical strength against the tearing force when the coil 2 is inserted, and also restricts the movement of the insulator 3 in the axial direction.

However, in the slot insulator shown in FIGS. 1 and 2, when the coil 2 is inserted with a high space factor, the cuff portion 4 is greatly expanded, and a large gap is created between the coil 2 and the insulator 3. There was a drawback that the face could not be filled sufficiently, the mechanical strength of carp/l/2 was reduced by 9, and dust entered from the void area and adhered to the insulator 3, resulting in a decrease in insulation properties. Another disadvantage is that when the insulator 37 is pressed against the stator core 1 during coil insertion, the portion that contacts the edge portion of the stator core 1 is damaged.

Next, in the slot insulator shown in FIGS. 3 and 4, the end of the insulator 5 is surrounded by an adhesive band 6, and the adhesive band 6 is adhered to the insulator 5. (Jikkosho AB-35361
(see publication).

However, the slot insulators shown in FIGS. 5 and 4 are pasted during automatic installation of the insulators into the slots. ff6
There is a risk that the adhesive band B may peel off, and if the adhesive part of the adhesive band 6 is formed wide enough to be inserted into the slot in order to eliminate the peeling of the adhesive band B, the space factor of the coil 2 will decrease. There are ≠2.

Then, the slot insulator shown in FIGS. 5 and 6 is
A part of the insulator 7 is folded back, and when the insulator 7 is automatically inserted into the slot, the folded end portion 8 is further bent to form a cuff portion 9 (see Japanese Utility Model Publication No. 54-22102).

Although the slot insulator shown in FIGS. 5 and 6 can reduce the opening of the cuff part 9 when inserting the coil, the insulator 7 of double thickness is installed inside the slot. However, there is a drawback that the space factor of the coil 2 is reduced.

[Purpose of the invention]

An object of the present invention is to provide a rotation system that can significantly reduce the spread of the cuff portion when the coil is inserted, has high mechanical strength against compression when pressed against the stator core, and can prevent a decrease in the space factor of the coil. Located in providing slot insulation for electrical machines.

[Summary of the invention]

In the present invention, a reinforcing insulator is layered on a main insulator installed in a slot provided in a stator core of a rotating electrical machine, from the inside of a cuff part to a position where it abuts an edge part of a stator core. The combination of these features makes it possible to achieve all of the above objectives with this configuration.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

7 and 8 show an embodiment of the present invention, in which a main insulator 1o is installed in a slot provided in a stator core 1 of a rotating electric machine, and the main insulator 10 is reinforced. The entire structure includes a reinforcing insulator 12.

A cuff portion 11 formed by bending is provided at the end of the main insulator 10.

The reinforcing insulator 12 is formed in a short shape and is overlapped with a portion of the main insulator 10 from the inner side where it meets the cuff portion 11 to the position where it abuts the edge portion of the stator core 1. Then, this reinforcing insulator 12 is automatically attached by cutting a piece of material with a width from the cuff part 11 to a position where it abuts the joint part of the stator core 1, overlapping it with the main insulator 10. .

The main insulator 10 and the reinforcing insulator 12 are, for example, formed of Nomex (trade name, manufactured by DuPont), and the reinforcing insulator 12 is preferably formed of the main insulator in consideration of reinforcing function, economical efficiency, etc. 6 formed to a thickness of 20-30% of 10
In addition, the main insulator 10 may be made of the above-mentioned claw-sized material, and the reinforcing insulator 12 may be made of a polyester film with high mechanical strength. Furthermore, both the main insulator 10 and the reinforcing insulator 12 may be made of a polyester film. Good too.

In the slot insulator of the above embodiment, the expansion of the cuff portion 11 when the coil 2 is inserted can be significantly reduced by the reinforcing insulator 12 compared to the case where only the main insulator 10 is used. As a result, the gap between the coil 2 and the main insulator 10 can be made smaller, and the treated varnish can be sufficiently filled into the gap, thereby improving the mechanical strength of the coil 2 and completely preventing dust from forming. Characteristics can be improved.

In addition, the part of the stator core 1 that comes into contact with the mechanical part has a double structure in which the main insulator 10 and the reinforcing insulator 12 are superimposed, so that the edge of the stator core 1 can be easily removed when inserting the coil. Even if the main insulator 10 and the reinforcing insulator 12 are not bonded together, they are overlapped on the car, so that slippage occurs between the two insulators. Therefore, loss WJ of the main insulator 10 can be better prevented.

In addition, according to the present invention, the materials of the main insulator 18 and the reinforcing insulator 12 are not limited to those in the above-mentioned embodiments, but may be appropriately selected and used depending on the style of the rotating electric machine.

〔Effect of the invention〕

According to the present invention described above, the reinforcing insulator is overlapped from the cuff part of the main insulator installed in the slot provided in the stator core to the position where it contacts the edge part of the stator core. This has the effect of significantly reducing the spread of the cuff part when the coil is inserted, and in turn, the gap between the coil and the main insulator can be made small enough to be filled with paper-treated varnish, which improves the mechanical strength of the coil. In addition to having the effect of improving strength, it is also possible to prevent the adhesion of dust that enters through the void, thereby improving insulation properties.

Furthermore, according to the present invention, the part that contacts the edge part of the stator core has a double structure of the main insulator and the reinforcing insulator, and moreover, both insulators are overlapped and slip. This has the effect of preventing damage to the main insulator due to compression when the coil is pressed against the edge of the stator core during insertion.

Furthermore, according to the present invention, the auxiliary insulator is provided only in the section from the cuff of the main insulator to the position where it abuts the edge of the stator opening, thereby preventing a decrease in the space factor of the coil. There are also benefits.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 are a perspective view of an example of a conventional slot insulator in an installed state and an enlarged sectional view of a part of it in a used state;
3 and 4 are perspective views of other examples of conventional slot insulators in an installed state and partially enlarged cross-sectional views of used conditions, and FIGS. 5 and 6 are other examples of conventional slot insulators. 7 and 8 show an embodiment of the slot insulator of the present invention, and FIG. FIG. 8 is an enlarged sectional view of a portion of the device in use. DESCRIPTION OF SYMBOLS 1... Stator core, 2... Coil, 10... Main insulator of slot insulator, 11... Cuff part formed in main insulator, 12... Reinforcement insulator. Figure 1, figure 2, figure 3, figure 4, figure 5, figure 6, figure 6.

Claims (1)

[Claims] 1. In the main insulator installed in the slots and holes formed in the stator core of a rotating electrical machine, the portion from the inside of the cuff part to the position where it comes into contact with the edge part of the stator core, A slot insulator for rotating electric machines characterized by overlapping reinforcing insulators. 2. The main insulator and the reinforcing insulator are formed of the same material,
A slot insulator for a rotating electric machine according to claim 1, wherein the reinforcing insulator is formed to have a thickness of 20 to 30% of the thickness of the main insulator. 3. The slot insulator for a rotating electric machine according to claim 1, wherein the main insulator is made of Otonomex (trade name, manufactured by DuPont), and the reinforcing insulator is made of polyester film.