KR910008539B1 - Stator of dc machine - Google Patents

Abstract

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Description

Stator of DC motor

1 to 4 show one embodiment of the stator of the DC motor according to the present invention in the order of manufacturing process, and FIG. 1 is a perspective view of a coil body wound around.

2 is a perspective view of a field coil formed by molding the coil body of FIG.

FIG. 3 is a front sectional view showing a state in which magnetic poles with magnetic field coils of FIG.

4 is a front sectional view showing a stator formed by forming an insulating resin coating layer on the field coil portion of FIG. 3 and internally machining the magnetic pole core;

5 is a side cross-sectional view of the stator of FIG.

6 is a front sectional view of a conventional stator.

* Explanation of symbols for main parts of the drawings

1: iron 10: iron core

11: enamel flat wire 13: binding tape

14 Field coil 15 Insulation resin film layer

The present invention relates to a stator of a DC motor mounted on a yoke, for example, in which a field coil is fitted to a magnetic pole such as a starting motor.

6 is a sectional view showing the main parts of the stator of the conventional direct current machine shown in Japanese Patent Application Laid-Open No. 57-193950, for example. (1) is a yoke, (2) is a magnetic pole core attached to this yoke with bolts (3), and (4) a coil of field fitted to this magnetic pole and thinly coated on both sides and a thick conductor coated with insulation resin thickly on the upper and lower sides. It is formed by winding it into a mold.

In the stator of a conventional DC motor as described above, forming a thin insulating coating layer on both sides and a thick upper and lower surfaces of the flat conductor of the field coil 4 is very difficult to manufacture, and the insulating coating layer has a considerable thickness. There was a problem that the spot rate of the decrease.

The present invention has been made to solve this problem, the coil conductor having a thin insulating film is used, the spot ratio of the field coil conductor is improved, the inner diameter of each magnetic pole core is the same, and the stator of the DC machine with a uniform air gap It aims to get.

The stator of the DC motor according to the present invention winds up the enameled flat conductor, wraps the binding tape in various places of the outer periphery, and forms an field coil by bending the arc to form a field coil. It is attached to the field coil part by the insulation resin adhesion processing, and the internal diameter part of each pole iron core is cut-processed.

In the present invention, the field coil has an enameled flat conductor, a thin insulating film, and a high drop rate of the conductor. In addition, the formed field coil is put in the magnetic iron core, and the magnetic iron core is mounted on the iron, and the insulation resin is attached to the magnetic field, and the insulation coil layer is formed in the gap between the iron and the magnetic iron core and on the exposed surface. In this way, the field coil is strongly fixed to the magnetic pole core and the iron, and the inner diameter of the magnetic pole core is easily processed, and the cutting powder is prevented from remaining attached to the magnetic field coil.

1 to 4 show one embodiment of the stator of the direct current machine according to the present invention in the order of process. First, as shown in FIG. 1, a coil (12) is formed by winding a predetermined number of times with a frame (not shown) wound around an enamel flat conductor 11 formed of a conductor material such as copper wire, to form a binding tape in various places of the outer circumference. Wind up (13).

Subsequently, as shown in FIG. 2, the coil coil 12 is formed by bending the arc with an arc-shaped bending mold (not shown) as the rear surface of the coil element 12 conforms to the inner diameter surface of the yoke.

This field coil 14 is fitted to the magnetic pole core 10 as shown in FIG. 3, and the magnetic pole core is attached to the yoke 1 with bolts (not shown). The field coil 14 has a gap between the magnetic pole core 10 and the yoke 1 due to the thickness of the binding tape 13.

Next, the field coil 14 and the iron core 10 are treated with an insulating resin by powder insulation resin or an insulating varnish, and the insulating film layer 15 is formed on the surface of the field coil 14 as shown in FIGS. 4 and 5. ), Covering the exposed surface, and filling the gap with the yoke 1 and the magnetic iron core 10. In this state, the inner diameter of each magnetic pole core 10 is finished to a predetermined dimension by machine cutting. 10a shows the finished surface that has been machined.

In this case, the field coil 14 is firmly fixed to the yoke 1 and the magnetic pole core 10 by the insulating coating layer 15, and the internal diameter finishing of the magnetic pole core 10 is easily performed. Attachment remaining on the field coil 14 is prevented. In addition, the magnetic pole cores 10 attached to the yoke 1 are subjected to the inner diameter finishing process, and the air gap with the armature cores (not shown) becomes uniform for each pole, and the performance is improved. Moreover, by finishing the inner diameter of each magnetic pole core 10, the air gap value can be set small, and the performance is further improved.

As mentioned above, according to this invention, an enamel flat wire is wound and a binding tape is wound up in several places. Insert the magnetic field coil formed by bending the arc into the magnetic pole core, attach the magnetic core to the iron, and form an insulating resin film on the surface of the field coil by the insulating resin adhesion treatment, and the gap between the iron and the magnetic pole cores. The internal diameter of the magnetic pole cores is filled, and cheap enamel flat conductors are used, improving the spot ratio of the field coil conductors, making the air gap uniform, and improving the performance.

Claims (1)

In the stator of a yoke, a stator iron bolt bolted to the yoke, a field coil fitted to the pole iron, and a flat conductor coated on the field coil, the enamel flat wire 11 is wound, and a plurality of places of the outer circumference are wound. The binding tape 13 is wound around the magnetic field coil 4 and the magnetic pole core mounted on the yoke 1 having the field coil 4 inserted therein, the back side of which is bent in an arc shape along the yoke 1. 10) and an insulating resin coating layer 15 attached to the field coil 4 and filled in the gap between the yoke 1 and the pole iron core 10, and the inner diameter of each pole iron core 10 is finished. The stator of the DC motor, characterized in that.

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