JPH05276703A - Field winding - Google Patents

Abstract

PURPOSE:To present the deformation of a field winding and improve the reliability of its insulation even though it is expanded and shrunk by vibrations and heat, in spite of its constitution wherein it is wound directly on the outer periphery of a field core. CONSTITUTION:On the outer periphery of a field core 1A, grooves 7, each of which has an adequate width in the longitudinal direction and has an adequate depth, are provided in at least one place in the longitudinal direction. Also, a core insulator 8 is provided on the outer periphery of the field core 1A by bonding an insulation sheet to it or by applying an insulation coating agent to it. A copper material coated with an insulator is wound directly on the outer periphery of the core insulator 8. Then, the wound copper material coated with an insulator is fastened to the field core 1A by winding binding tapes 11 on the outside of the wound copper material through utilizing the grooves 7. Further, an insulation resin is impregnated into the binding tapes 11, and it is subjected to heating and curing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a direct winding type field winding used in a rotary electric machine.

[0002]

2. Description of the Related Art In a direct winding type field winding used in a rotating electric machine (for example, a DC machine), an iron core insulation 2 as an insulation treatment is provided on the outer periphery of a field iron core 1B as shown in FIGS. After that, the insulating coated copper body 3 was directly wound to form the field winding 4, and the field winding 4 was hardened by impregnating the insulating resin. The field winding 4 is attached to the field iron core 1B by the tension during winding.

[0003]

However, in the above-mentioned structure, the field winding 4 as a whole cannot be wound and fastened with the bind tape such as glass tape to maintain its shape. Further, even when the insulating resin is impregnated, since it is not sealed with a film or the like, most of the insulating resin flows out at the stage of heating and curing the insulating resin, and the insulating resin held between the insulating coated copper bodies 3 is The amount is small, and the adhesive force between the insulating coated copper bodies 3 is weak. Therefore, due to the vibration during operation of the rotating electric machine and the expansion and contraction due to the temperature change of the insulation-coated copper body 3 itself, the insulation-coated copper body 3 wound around the outermost layer indicated by reference numeral 5 in FIG. As a result, the insulation may be damaged, and this improvement has been desired.

Therefore, an object of the present invention is to prevent winding of the field core even if it is wound around the outer circumference of the field iron core even if it expands or contracts due to vibration or heat, thereby improving the insulation reliability. To provide a magnetic winding.

[0005]

In order to achieve the above-mentioned object, the present invention directly winds an insulating coated copper body through an insulating layer provided on the outer periphery of a field iron core and impregnates it with an insulating resin. In this field winding, a groove is provided on the outer circumference of the field core, and the insulating tape inserted through the groove is wound around the wound insulating coated copper body.

[0006]

[Function] Since the groove is provided on the outer circumference of the field core, even if the insulation-coated electric wire is directly wound through the insulating layer provided on the outer circumference of the field core, the outer side can be tightened with the insulating tape. It is possible to secure the whole insulation-coated copper body after winding,
The amount of insulating resin flowing out at the time of heating and curing after impregnating the insulating resin is reduced, the state at the time of shaping is maintained, the shape is not deformed even if there is vibration or expansion and contraction, and the reliability of insulation can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention,
FIG. 2 is a sectional view taken along line AA of FIG. In FIG. 1 and FIG. 2, 1A is a field iron core, and in this field iron core 1A, a groove 7 having an appropriate width and depth is provided on the outer periphery in the longitudinal direction at one or more locations along the length direction, And stick an insulating sheet such as mica sheet or aramid sheet on the outer periphery,
Alternatively, the iron core insulation 8 is provided by coating with an insulating agent. However, in the groove portion 7, the width of the iron core insulation 8 in the vertical direction is made substantially equal to the width of the field winding described later in the same direction.

A field winding 10 is formed on the outer periphery of the field core 1A provided with the core insulation 8. This field iron core 10 has an insulation-coated copper body 3 wound directly on the outer periphery of an iron core insulation 8 to form a field iron core 1
The outer side of the insulation-coated copper body 3 wound by using the groove 7 of A is fastened with a binding tape 11 such as a glass tape to firmly hold the wound insulation-coated copper body 3, and then the epoxy It is formed by impregnating an insulating resin such as a resin and heating and curing. The groove 7 is also provided on the opposite side of the drawing, and the opposite side of the drawing is also wound with the bind tape 11.

Therefore, with the above-mentioned structure, since the entire wound insulating coated copper body is fixed with the binding tape, the outflow of the impregnated insulating resin at the time of heat curing is reduced, and each insulation is reduced. The coated copper body is kept in the as-formed state, and it is prevented from losing its shape even if it expands or contracts due to vibration or heat, improving the reliability of insulation.

[0010]

As described above, according to the present invention, a groove is provided on the outer circumference of the field core, and the groove is used to insulate the outside of the insulation-coated copper body directly wound around the field core. Since the tape is taped, the insulation-coated copper bodies after winding are bound together, and the shape collapses even when an external force such as expansion and contraction such as thermal expansion due to energization heating, contraction when de-energized, or vibration is applied. A field winding having improved insulation reliability can be provided.

[Brief description of drawings]

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

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

FIG. 3 is a perspective view of a field winding wound directly around a conventional field iron core.

4 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

1A ... Field iron core, 3 ... Insulation-coated copper body, 7 ... Groove, 8 ... Iron core insulation, 11 ... Bind tape.

Claims (1)

[Claims] 1. A field winding formed by directly winding an insulating coated copper body through an insulating layer provided on the outer periphery of a field core and impregnating an insulating resin, wherein a groove is provided on the outer periphery of the field core. A field winding, wherein the insulating tape inserted through the groove is wound on the outside of the insulation-coated copper body after winding.