JPS5879447A - Stator for rotary electric machine - Google Patents

Abstract

PURPOSE:To effectively insulate the coil end and to improve the ventilating effect of the coil by forming a gap between an insulating sheet and the surface of a core and coating and bonding the sheet on the coil end. CONSTITUTION:A plurality of coils are contained through a slot insulating sheet 3 in each slot 2 of a stator core 1, and an insulating sheet 4 which is made, for example, a mica wet tape or a prepreg material is covered and bonded to the coil end 5 of the coil. The sheet 4 is bonded to the coil end 5 to have a gap g between the sheet 4 and the surface 1a of the core, and the gap g operates to dissipate the heat from the coil.

Description

[Detailed description of the invention] The present invention relates to a stator for a rotating electric machine.

Generally, stators for rotating electric machines have slots K in the iron core.

By accommodating winding of multiple coils through slotted insulating paper,
Each coil end was tied and fixed with a binding thread, and then impregnated with varnish for insulation.

However, this method of fixing and insulating the coil ends requires a lot of manual work, requires a considerable number of man-hours, and has poor work efficiency.

Furthermore, since the coil generates heat when energized, it is necessary to cool the coil to prevent excessive temperature rise.

The present invention has been made in view of the above-mentioned points, and is a stator for a rotating electric machine in which the coil is fixed and the coil end is coated and insulated by applying an insulating sheet to the coil end of the coil. The insulating sheet is
By providing a stator for a rotating electrical machine in which the coil end portion is coated with a gap between the iron core surface and the core surface, the coil end portion can be fixed and insulated extremely easily, and the coil end portion can be fixed and insulated very easily. It is possible to improve the ventilation effect of the area and perform sufficient cooling.

The present invention will be described in detail below with reference to the drawings.

(1) is the stator core, and each slot (2
), a plurality of coils are inserted into the slot insulating paper (3)'-t-
The windings are housed through. (4) is an insulating sheet, and the coil end part (5) of the coil housed in the iron core (1) K is
) is coated and insulated. As the insulating sheet (4), a mica wet tape or a polyester nonwoven fabric impregnated with a thermosetting resin such as an epoxy resin is heated.
An annular insulating sheet (4a
) or a rectangular insulating sheet (4b) cut into rectangles as shown in FIG. 6 may be used.

circular insulation sheet) (4a) and rectangular insulation sheet (4a)
b) are each provided with a plurality of incisions (6) and are configured to allow a good coating along the coil ends (5).

The insulating sheet (4) and the coil end portion (5) are coated and pasted so that the insulating sheet (4) has a gap with the core surface (1a).

This gap (g) is such that the slot insulating paper (3) is connected to the iron core (1).
The distance should be the same as the electrically required creepage distance. If the gap is set at this distance, the end of the slot insulating paper (3) and the end of the insulating sheet (4) will come into contact with each other, allowing for efficient heat dissipation and insulation of the coil. The coil may be cooled by providing an internal fan on the rotor side, for example, to ventilate the inside of the electric machine and improve the heat dissipation effect of the coil.

In order to coat the coil end portion (5) with the insulating sheet (4), place the insulating sheet (4) on the iron core (1) in which the coil is housed as shown in Figure 4. From above part (5), the core surface (1a) and the gap (
2) is closely attached along the outer edge of the coil end portion (6) to cover and insulate the entire coil end portion (5) as shown in FIGS. 1 to 3. Insulating sheet (4
), when the prepreg material mentioned above is used, the insulating sheet (4) is brought into close contact with the fill end 1ts (51), and then heated and cured to fix the coil and coat the coil end with insulation. Heating methods include, for example, heating the stator coil with electricity, and heating at a relatively low temperature (100~
The insulating sheet (
4) can be completely cured by heating.

Since the fixation and coil end insulation can be ensured, there are considerable advantages in terms of safety measures, and the number of man-hours is also significantly reduced.
;It can be reduced and costs can be reduced.

Further, since the insulating sheet is coated and pasted on the coil end portion with a gap provided between the core surface and the core surface, the heat generated in the coil portion is dissipated through the gap, thereby preventing an excessive rise in the temperature of the coil.

[Brief explanation of drawings]

The drawings are all related to the present invention, and Fig. 181 is a plan view of the stator, Fig. s2 is a sectional view of the stator, Fig. 83 is a side view of a portion of the stator enlarged, and Fig. 1114 is a stator covered with an insulating sheet. 5 and 186 are plan views showing different insulating sheets, respectively. FIG. 11!5 is a plan view of an annular insulating sheet, and FIG. 6 is a plan view of a rectangular insulating sheet. 1... Iron core, 3... Slot insulation paper, 4.4a, 4
b...Insulating sheet, 5...Coil end part. Figure 1 Figure 2 Figure 5

Claims (1)

[Claims] (1) A rotating electric machine in which the coils are fixed and the fill end portions are coated and insulated by covering and pasting an insulating sheet to the coil end portion of each coil wound in the slot of the iron core via slot insulating paper. A stator for
A stator for a rotating electric machine, wherein the insulating sheet is coated and adhered to the coil end portion with a gap provided between the insulation sheet and the iron core surface.