JP2645094B2 - Method of manufacturing multi-turn coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method for manufacturing a multi-turn coil used for a transformer, a reactor, and the like, and particularly to a method for forming an interlayer insulator. is there.

(Prior Art) Conventionally, as a method of manufacturing a multi-turn coil used for a transformer or the like, a method of winding a tape-like insulator while winding a coil conductor to form an interlayer insulator (Japanese Patent Publication No. 56-34085) Gazette).

This method has a feature that the discontinuous operation at the time of inserting the interlayer insulator or the end insulator in the coil winding operation can be greatly improved.

(Problems to be Solved by the Invention) However, since the winding operation of the coil conductor and the tape-shaped insulator is performed continuously and almost simultaneously, the thickness of the interlayer insulator that can be formed is limited, and the design of a transformer or the like is limited. Was a major obstacle.

In addition, after the completion of the coil winding operation, the operation of drying the coil in a vertical state is performed to remove moisture in the insulator. At this time, since a vertical force is applied to the coil conductor, a force is also applied to the interlayer insulator, and the wrap of the tape-shaped insulator may change. This has the disadvantage that the coil insulation is fatal and leads to electrical breakdown.

The object of the present invention has been made in view of the above-mentioned problems, and the thickness of the interlayer insulator can be arbitrarily formed, and can sufficiently withstand the mechanical force in the coil axial direction. It is an object of the present invention to provide a method for manufacturing a multi-turn coil.

[Means for Solving the Problems] In order to achieve the above object, the present invention relates to a method for manufacturing a multi-turn coil in which a coil conductor is wound in multiple layers and an interlayer insulator is interposed between the winding layers. The coil conductor is cut for each winding, and the interlayer insulator is formed by wrapping the tape-shaped insulator in the width direction on the outer peripheral surface of the winding layer of the coil conductor, and reciprocating in the axial direction of the coil. And formed by winding.

(Operation) Therefore, according to the method of the present invention, the thickness of the interlayer insulating material made of the tape-like insulating material has no relation to the number of turns of the conductor, and can be any thickness and inclination. Since the insulator is wound in a gaitlet shape by reciprocating movement, the insulator is firmly wound around the conductor winding layer.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG.
In the figure, the winding start portion 1a of the coil conductor 1 is fixed at a predetermined position on the inner peripheral insulator 5, and is wound in the direction of the arrow to form a conductor winding layer. Then, the coil conductor 1 is cut once at that position.

Next, end insulators 3 are provided at both ends of the conductor winding layer. The insulator 3 is manufactured so as to have the same height as the conductor 1. One end 2a of the tape-shaped insulator 2 is fixed on the end insulator 3 and wound in a direction opposite to the arrow with equal wrap, and stopped on the end insulator 3 at the other end. Subsequently, the tape-shaped insulator 2 is wound on the tape-shaped insulator 2 in the direction of the arrow with equal wrap, and stopped at an arbitrary position 6. Subsequently, the tape-shaped insulator 2 is placed at an arbitrary position 6.
Is wound in the direction opposite to the arrow and stopped at the end. A filling 7 made of a tape-shaped insulator is inserted into a gap formed at the end. Thus, the first interlayer insulator 4 is formed.

Next, one end 1b of the cut conductor 1 is fixed on the interlayer insulator 4 and wound in the direction of the arrow to form a second conductor winding layer, and then cut. An end insulator is provided on both ends of the second conductor winding layer, and one end 2b of the tape-shaped insulator 2 is fixed thereon, and reciprocates in the direction of the arrow and the direction of the opposite arrow with equal wrap in the width direction. And wound to form the first interlayer insulator 4
Conversely, a second interlayer insulator having a thicker left side in the figure is formed. Thereafter, in the same manner, the conductor winding layer and the interlayer insulator are wound in multiple layers, and then the conductors 1 of each conductor winding layer are connected in series.

In this way, the winding direction of the tape-like insulator 2 is alternated, so that the tape-like insulators adjacent in the radial direction are wound in a gaiter shape. For this reason, the tape-shaped insulators 2 are interposed between the conductor winding layers in a state where they are prevented from shifting from each other, and the interlayer insulator becomes a very strong interlayer insulator.
Further, in order to separate the coil conductor 1 and wind the tape-shaped insulator, the tape-shaped insulator 2 is wound irrespective of the winding of the coil conductor 1 so that the interlayer insulator 4 having an arbitrary thickness and an arbitrary inclination is formed. Can be formed.

[Effects of the Invention] As described above, according to the method of the present invention, it is possible to arbitrarily form an interlayer insulator using a tape-shaped insulator, which has been limited by the number of turns of the coil conductor, and to wind the interlayer insulator. When the direction is gaited, a stronger interlayer insulator can be formed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state of a multi-turn coil manufactured by the method of the present invention. 1 ... conductor, 2 ... tape-shaped insulator, 3 ... end insulator, 4 ... interlayer insulator, 5 ... inner circumference insulator, 6 ... arbitrary position, 7 ... padding.

Claims (1)

(57) [Claims] 1. A method of manufacturing a multi-turn coil in which a coil conductor is wound in multiple layers and an interlayer insulator is interposed between winding layers, wherein the coil conductor is cut for each single turn, and thereafter the interlayer insulator is cut. Is a method of manufacturing a multi-turn coil, wherein a tape-shaped insulator is wrapped in the width direction on an outer peripheral surface of a winding layer of a coil conductor and is wound by being reciprocated in the axial direction of the coil.