JP2566774Y2 - Iron core structure of linear induction motor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated structure of a primary side iron core plate of a linear induction motor.

[0002]

2. Description of the Related Art In a conventional primary core of a linear induction motor, holes are provided between slots for inserting coils of an iron core plate constituting the iron core in order to reduce the weight of the iron core. In an iron core structure formed by stacking such iron core plates, holes are exposed on the outer surface at both ends in the stacking direction. FIG. 3 is a sectional view taken along line AA of FIG. 1 similar to FIG. In FIG. 3, holes 2 are provided between the slots 1 of the iron core plate 4, and both end surfaces in the iron core plate lamination length direction are constituted by the iron core plates 4 having the holes 2.

[0003]

However, in the case of an iron core structure in which the hole 2 is directly exposed to the outside, when the coil is inserted into the iron core and the coil portion is impregnated with resin to perform insulation treatment, the resin is not applied to the hole portion. In order to prevent intrusion, there is a disadvantage that a large number of man-hours are required for the pre-impregnation treatment. As a means of preventing resin from entering the hole during the resin impregnation step, there is also a method of applying a single-sided adhesive tape material and closing the hole, but during the operation of the resin impregnation step, the tape material is peeled off with force, It may be damaged and is not an appropriate means.

As a practical means, a blind plate made of a thin iron plate for closing a hole is prepared, and this blind plate is attached by welding or an adhesive. However, such a method requires a large number of man-hours for manufacturing a blind plate, bonding work, and the like. The hole 2 is provided to reduce the weight of the motor, and the hole cannot be omitted. The present invention has been made in view of the above points, and an object of the present invention is to provide a core structure of a linear induction motor capable of preventing the above-described infiltration of an insulating resin. .

[0005]

Means for attaining the object is to use a hole 2 instead of a core plate 4 provided with a hole 2 in order to omit the pretreatment work of impregnating the coil with the insulating resin. Is to use the iron core plate 5 which is not provided.

[0006]

The effect of the present invention is to prevent the holes from being exposed on the core plate laminated end face of the iron core plate 5 having no holes 2 so that the impregnated resin can be prevented from entering the holes of the iron core. Hereinafter, an embodiment of the invention will be described in detail with reference to the drawings.

[0007]

FIG. 1 is an explanatory view showing an embodiment of a primary core structure of a linear induction motor according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In FIGS. 1 and 2, the core plate 4 excluding the core plate 5 on both end surfaces is laminated with the hole 2 penetrated, and the hole 2 for closing the hole 2 is not provided at both end surfaces. An iron core plate 5 is provided to constitute a primary iron core. The iron core plate 5 without the hole 2 is manufactured by omitting the punching operation of the hole 2 in the pressing operation of the iron core plate 4.

[0008]

According to the present invention described above, according to the present invention, a coil is conventionally inserted into an iron core on which an iron core plate is laminated, and resin intrusion into holes exposed at both end surfaces of the iron core before an insulating resin impregnation step of the coil. Although it was necessary to perform a pretreatment for preventing the intrusion, it is no longer necessary to perform a pretreatment for preventing the intrusion of the resin.

[0009]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 1 similar to FIG.

[0010]

[Explanation of symbols]

 Reference Signs List 1 slot 2 hole 3 coil 4 iron core plate 5 iron core plate L iron core plate lamination direction length

Claims (1)

(57) [Scope of request for utility model registration] In a primary core structure of a linear induction motor in which a core plate having holes provided between slots for inserting coils is laminated, both ends in a stacking direction of the core plates provided with the holes before resin impregnation are provided. An iron core structure for a linear induction motor, wherein a core plate having no holes is provided so that resin does not enter the holes during the resin impregnation step.