JP2853579B2 - Lead-out structure of foil-wound transformer coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead-out structure for a foil-wound coil of a transformer.

[0002]

2. Description of the Related Art As shown in FIG. 2 (a), a conventional foil-wound coil has a leading plate 2a protruding from the end of the conductor 1a to the left side of the drawing at the beginning of winding of the inner foil-like conductor 1a. A lead plate 2c protruding in the same direction also at the winding start end of the outer foil-like conductor 1b
Are welded or pressure-welded, and stacked as shown in FIG.
The insulating sheet 5 is inserted between the outer foil-like conductors 1a and 1b, and the insulating sheet 5 is also inserted inside the inner foil-like conductor 1a and wound around a winding form. After the required number of turns, as shown in FIG. 2 (b), a leading plate 2b protruding to the left side of the drawing is attached to the end of the winding of the inner foil-like conductor 1a, and the same direction is applied to the end of the winding of the outer foil-like conductor 1b. 2d is welded or pressed into contact, and the main insulation and primary coil are wound thereon to form the coil 4. Then, as shown in FIG. 2 (c), the lead plate 2c coming out of the beginning of the winding of the outer foil conductor 1b and the leading plate 2b coming out of the end of the winding of the inner foil conductor 1a are combined with the iron core 6, and
Is connected to the neutral point terminal by a bolt 3 on the upper side, and is inserted into the tank 7.

[0003]

However, FIG.
As shown in FIG. 3 (c), inside and outside of the exit plate 2c and the exit plate 2b, there are exit plates 2a and 2d, and the connection work is difficult, and the terminal connection process of the exit plates 2a and 2d is difficult. It is troubled by the connection bolts of the neutral terminal, which requires time and effort. Further, in order to connect the outlet plate 2c and the outlet plate 2b with the bolts 3, at least a space corresponding to the length of the bolt 3 is required between the inner and outer outlet plates 2a and 2d. There is a problem that the outlet plate 2d protrudes outside from the side surface of the coil, and the tank of the transformer becomes large. Therefore, the present invention facilitates the production of the contents of the foil-wound transformer and makes it compact.

[0004]

According to the present invention, the connection between the leading plate extending from the beginning of the winding of one foil conductor and the leading plate extending from the end of the winding of the other foil conductor is connected at the lower part of the coil. Then, one of the outlet plates is also extended to the upper part of the coil to form a neutral terminal.

[0005]

According to the present invention, the connection is made at the lower part of the coil where there is no other outlet plate, which facilitates the manufacture and makes the transformer compact.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
At the beginning of winding, the lead plate 2a is projected from the end of the conductor 1a to the left side of the drawing and welded or pressed. Further, at the beginning of winding of the outer foil-like conductor 1b, a lead plate 2e is attached to the outer foil-like conductor 1b.
3, the insulating sheet 5 is inserted between the inner and outer foil conductors 1 a and 1 b so as to be welded or pressed into contact with each other on the left and right sides of the paper surface of FIG. Also, the insulating sheet 5 is inserted and wound around a winding form. After the required number of turns, as shown in FIG. 1 (b), the leading end of the outer foil conductor 1b is projected from the end of the conductor 1b to the left on the paper surface, and the exit plate 2d is wound to the end end of the inner foil conductor 1a. Exit plate 2f at the end
Is projected or welded or pressed against the right side of the drawing in the direction opposite to the leading end plate 2a at the winding start end, and the main insulation and primary coil are wound thereon to form the coil 4. Thereafter, as shown in FIG. 1 (c), the lead plate 2f and the lead plate 2e projecting downward from the outer foil conductor 1b in combination with the iron core 6 so that the lead plate 2f is below the coil 4 are formed. , Bolts 3 to form a neutral terminal, and insert into the tank 7. With this configuration, the output plates 2e serving as neutral terminals protrude above and below the coil 4, and the output plates 2f serving as other neutral terminals protrude below the coil 4. Since the neutral point connection portion can be brought below the coil 4, the connection operation becomes easy, and the neutral point connection portion 3 protrudes above the coil 4.
The terminal connection process of the book outlet plates 2a, 2d and 2e can be easily performed without being disturbed by the connection bolt of the neutral terminal as in the prior art. In addition, the size of the tank is not increased due to the bolt. The same effect can be obtained by welding or press-contacting the lead plate 2f at the beginning of winding of the outer foil conductor 1b and the leading plate 2e at the end of winding of the inner foil conductor 1a.

[0007]

As described above, according to the present invention, the connection work can be performed without the other outlet plates being in the way, so that the work is facilitated. Also, since the exit plate does not protrude from the coil surface,
Equipment can be downsized.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a diagram showing a state in which a lead plate is attached at the beginning of winding of a foil conductor, and FIG. FIG. 4C is a side view of the completed state of the contents.

FIGS. 2A and 2B are diagrams showing a conventional example, in which FIG. 2A is a diagram showing a state in which a lead plate is attached at the beginning of winding of a foil conductor, FIG. (C) is a side view of the contents completed state.

FIG. 3 is a state diagram of the present invention and a conventional winding process.

[Explanation of symbols]

 1a Inner foil conductor 1b Outer foil conductor 2a-2f Exit plate 3 Bolt 4 Coil 5 Insulating sheet 6 Iron core 7 Tank

Claims (1)

(57) [Claims] An insulator is sandwiched between two foil conductors,
In addition, in a foil-wound transformer in which an insulator is inserted into the inside or outside of two foil conductors and wound at the same time, an output plate from the beginning of winding of one foil conductor and the other of the foil conductor are wound. The connection of the lead plate coming out from the end of winding is performed at the lower part of the coil, and either one of the lead plates is extended also to the upper part of the coil, so that the lead of the foil-wound transformer coil having a neutral terminal is formed. Part structure.