JPS5931965B2 - Manufacturing method of electromagnetic coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an electromagnetic coil that can automatically produce an electromagnetic coil that has a large cooling effect and excellent insulation properties.

In an electromagnetic coil, heat generated in a coil conductor is mainly conducted through the coil conductor or an insulating layer and reaches one of the cooling ducts, where it is transferred to a cooling medium such as insulating oil or air, and the heat is radiated.

This cooling duct for heat dissipation is usually formed by inserting a duct piece, and in order to arrange the duct piece, it must be placed on a thick insulator such as a press port whose length matches the circumference of the coil. The duct piece is pasted and wound around the outer periphery of the coil, or the duct piece is fixed onto a thin interlayer insulator inserted between the coil layers with adhesive tape such as cotton tape or polyester.
However, in this method, the duct peep is fixed with adhesive, etc., which causes wrinkles and bulges in the interlayer insulation, which tends to cause a decrease in insulation and cooling properties and variation in finished dimensions, and vibrations and electromagnetic machines. It has the disadvantage of being weak against force.

Furthermore, different manual labor is required for each layer, such as cutting the insulator to match the coil circumference and fixing the duct piece with insulators such as cotton tape or adhesive, which increases the time required to produce the coil. It was difficult to plan for automation. The present invention has been made in consideration of the above-mentioned points, and its purpose is to create an electromagnetic coil that can be automated by making the coil conductor winding process, insulator winding process, and duct piece insertion process continuous work processes. The purpose is to obtain a manufacturing method.

The method for manufacturing an electromagnetic coil according to the present invention will be explained below with reference to the drawings.

In FIGS. 1 and 2, first, the winding start part 11-1 of the coil conductor 11 is fixed at a predetermined position on the inner peripheral insulator 10, and the winding start part 12-1 of the tape-shaped insulator 12 is fixed on the outside thereof. and wind each at the same time.

In order to form the conductor winding layer 11a, the coil conductor 11 is
The tape-shaped insulating material 12 is wound so as to proceed in the direction of the arrow A, and the tape-shaped insulating material 12 is wound in a laminated manner to form the end insulating material 13a. After winding n times, the coil conductor 11 is (1
1-n) to complete the formation of the conductor-wound layer 11a, during which the tape-shaped insulator 12 forms the end insulator 13a, and then moves onto the conductor-wound layer 11a, forming the tape-like insulator 12. The material 12 is wound so as to proceed in the direction of the arrow A with appropriate overlap in the width direction of the material 12, and after n times, the material 12 reaches the position (12-n) and completes the formation of the interlayer insulator 14a. Next, the coil conductor 11 is continuously placed on the interlayer insulator 14a (11
-n+1), and the tape-shaped insulator 12 continues to move to the position (12-n+) at the right end of the conductor-wound layer 11a in the figure.
Move to position 1).

Then, the coil conductor 11 advances in the direction opposite to arrow A, and n
After the rotation, the position reaches from the position (11-n+1) to the position (11-2n), and the formation of the second conductor winding layer 11b is completed. During that time, the tape-shaped insulator 12 is wound so as to be stacked at the position (12-n+1) to form the end insulator 13b, and then transferred onto the conductor-wound layer 11b, and the tape-shaped insulator 12 is It is wound so that it advances in the opposite direction to arrow A with appropriate overlap in the direction, and after n times it becomes (12-2
The formation of the interlayer insulator 14b is completed upon reaching the position n). Next, the winding operation of the coil conductor 11 and tape-shaped insulator 12 is temporarily stopped, and a plurality of duct pieces 15a are inserted onto the interlayer insulator 14b at appropriate intervals in the circumferential direction of the coil. (not shown).

Next, the coil conductor 11 is moved to the winding start position (12-2n+1) on the duct piece 15a, and the tape-shaped insulator 12 is moved to the position (12-2n+1) to continue the winding operation. While the coil conductor 11 is wound in the same manner as described above to form the third conductor winding layer 11c,
The tape-shaped insulator 12 forms the end insulator 13c and subsequently forms the interlayer insulator 14c, while the coil conductor 11 forms the fourth conductor winding layer 11d.
The tape-shaped insulator 12 forms an end insulator 13d and an interlayer insulator 14d.

Then, a plurality of duct pieces 15b are inserted. Thereafter, similar steps are repeated until a predetermined number of layers are reached to form an electromagnetic coil. Note that the tape-shaped insulator 12 is wound around the outermost periphery to form one or two layers of outer periphery insulator (not shown).
However, if the electromagnetic coil is manufactured in this manner, the end insulators 13a, 13b and the interlayer insulators 14a, 14b are formed into tape-like shapes that are carried out simultaneously with the winding process of the coil conductor 11 forming the conductor-wound layers 11a, 11b. Since it is formed by the winding process of the insulator 12, each conductor winding layer 11a, 11
There is no need to cut the insulator to match the circumference of b.
Moreover, there is no need to stop the winding process of the coil conductor 11. In addition, the duct piece 15a is inserted onto the interlayer insulator 14b and held by a holder, and is fixed thereon by winding the coil conductor 11 and tape-shaped insulator 12 in the next winding process, which is different from the conventional method. This eliminates the need for different types of work such as fixing with adhesive or the like. Therefore, the winding process of the coil conductor 11, the process of winding the tape-shaped insulator 12, and the process of inserting the duct piece 15a are continuous work processes, which can be manufactured in a short time and can be easily automated. Further, the duct piece 15a is inserted without using adhesive or the like, and the interlayer insulator 14a14b is formed by winding the tape-shaped insulator 12, so that it fits well with the drawing of the conductor wound layers 11a and 11b. Therefore, wrinkles and curls do not occur in the interlayer insulators 14a and 14b.

Therefore, it is possible to obtain a magnetic coil that can eliminate deterioration in insulation and cooling properties and variations in finished dimensions. In the above embodiment, a case has been described in which a duct piece is inserted between every two layers of the conductor winding layer, but it is also possible to easily insert an additional duct piece between the two layers as necessary.

Furthermore, if a duct piece is used that has irregularities at least on the surface that contacts the interlayer insulator, the irregularities will engage with the ends of the tape-shaped insulator, thereby reducing movement and falling off of the duct piece.

[Brief explanation of drawings]

1 and 2 are a sectional view and a side view showing an electromagnetic coil manufactured by the method of the present invention. 11... Coil conductor, 11a to 11b...
...conductor winding layer, 12...tape-shaped insulator,
13a to 13d... end insulator, 14a to 14d... interlayer insulator, 15a, 15b... duct piece.

Claims (1)

[Scope of Claims] 1. A conductor winding step in which a coil conductor is wound a predetermined number of times to form a wound layer, and a tape-shaped insulator is wound to form the conductor wound layer, which is performed simultaneously with this conductor winding step. a tape-shaped insulator winding step of forming an end insulator at the end of the conductor and subsequently winding the tape-shaped insulator to form an interlayer insulator on the conductor-wound layer; and this insulator winding step. A method of manufacturing an electromagnetic coil, in which a predetermined number of layers of an electromagnetic coil are formed by repeating the step of inserting a duct piece onto the interlayer insulator formed by the method. 2. The method of manufacturing an electromagnetic coil according to claim 1, characterized in that a duct piece is used which has irregularities formed on at least the surface in contact with the interlayer insulator.