JPS5875432A - Stator for electric rotary machine - Google Patents

Abstract

PURPOSE:To fix and insulate a coil end extremely simply by coating and pasting a rectangular insulating sheet in covering manner, to a long side thereof a plurality of notches are formed, to the coil end section. CONSTITUTION:A plurality of coils are wound and encased to each slot 2 of a stator core 1 through insulating paper. The coil end sections 4 of the coils encased into the core 1 are coated and insulated with the rectangular insulating sheets 3. A plurality of the notches are formed to both long sides of the insulating sheets 3. Consequently, the separation of each coil and the contact of the coils with a non-charging metallic section can be prevented while the man-hours of work can largely be reduced due to extremely simple constitution.

Description

[Detailed description of the invention] This invention relates to stator C for rotating electric machines.

Generally, a stator for a rotating electric machine has a plurality of coils wound in slots of an iron core via insulating paper, and each coil end is tied and fixed with a weft thread C. After that, the stator is impregnated with varnish to insulate it. However, due to this method of fixing and insulating the coil ends, there was a lot of manual work involved, and the work efficiency was poor, as it required a huge amount of man-hours.

The present invention was made in view of the conventional rut point (-@l) described above, and the object is to provide a stator in which the coil ends can be fixed and insulated extremely easily. Stator I for rotating electric machines in which the coil is fixed by covering and pasting an insulating sheet with a number of notches on the long side to the coil end of the coil, and the coil end is covered and insulated. It is.

An embodiment of the present invention will be described below with reference to the drawings.

(Refer to the stator core, and each slot (2) of this core
In this case, a plurality of coils are wound and housed with insulating paper interposed therebetween. (3) is made into a rectangular disconnected sheet to cover and insulate the coil end portion (4) of the coil housed in the iron core il+. The insulating sheet (3) is provided with a plurality of notches (5) on both long sides (3&).

To attach the coil end (4) with the insulating sheet (3) @4 As shown in the figure, attach the iron core (1) 1 in which the coil is housed.
: Place the insulation sheet (3) and coil end (4)
From above, adhere closely along the outer edge of the coil end (4) to cover the entire coil end (4) as shown in Figure 1 H and Figure 182. At this time, the insulation ν−)+
Since the notch (5) is provided in 31, it is possible to cover the coil end (4) along the length of the coil end (4) with one insulating sheet (3). Alternatively, the coil end (4) may be covered using a tossing or counting insulation sheet (3). If the thickness is to be increased, a plurality of insulating sheets (3) may be stacked on top of each other.

For the insulating sheet (3), wet mica is used, or a prepreg material is used by heating Bobester nonwoven fabric impregnated with thermosetting resin such as epoxy resin and semi-curing the resin. After this insulating sheet (31) is brought into close contact with the coil end (4), the insulating sheet (3) is cured by heating to fix the coil and cover and insulate the coil end. For example, the insulating sheet (3) is heated by heating the coil itself by energizing the stator coil and passing it through a constant temperature oven at a relatively low temperature (100 to 120"C). (31 can be completely cured.

As explained above, according to the invention, it is possible to prevent each coil from coming apart and preventing the coil from coming into contact with non-photoelectric metal parts by using an extremely simple structure that simply covers and pasting an insulating sheet on the coil end. Since it can be done, it has a considerable advantage in terms of safety measures, and the number of man-hours can be greatly reduced, resulting in lower costs.

In addition, since the insulating sheet is rectangular, it is easy to prepare the material, and it is possible to use ideal materials with less material loss. It has great practical effects, such as being able to use C2.

[Brief explanation of the drawing]

The drawings all show one embodiment of the present invention, and Fig. 1 is a plan view of the stator, Fig. 2 is a sectional view of the stator, Fig. 3 is a plan view of the insulating sheet, and Fig. 4 is the stator. I is a schematic cross-sectional view showing a state in which an insulating sheet is not covered. 1... Stator core, 3... Insulating sheet, 4...
...Coil end Fig. 1 5), Fig. 4

Claims (1)

[Claims] 口) A stator for a rotating electric machine in which multiple coils are housed in slots in the iron core, in which a rectangular insulating sheet with multiple cuts in the long sides of the coil end part of the nth generation coil is covered and pasted. I: A stator for a rotating electric machine, characterized in that the coil is fixed and the coil end portion is coated and insulated.