JP2585039Y2 - Transformer coil terminals - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal provided on a transformer coil for connecting a winding and an output lead wire.

[0002]

2. Description of the Related Art Conventionally, in a leakage type transformer, FIGS.
As shown in FIG. 0, the bobbin 32 of the secondary coil 31 inserted through and supported by the main iron core 30a of the single-layer tripod iron core 30 has a lead wire 34 derived from the secondary coil 33 and a secondary output lead wire. A terminal 36 for connecting the terminal 35 is embedded and fixed. As shown in FIG. 11, the terminal 36 and the iron core 30 are insulated by the bobbin 32 at a predetermined interval D.

[0005] As shown in FIG. 12 A, the terminal 36 is a lead wire terminal 36 a for connecting the lead wire 34 and a bifurcated output lead terminal 36 for connecting the output lead 35.
b protrudes from the substrate 36c.

[0004]

[Problem to be solved by the invention] However, this terminal 3
6 is integrally formed by punching press.
As shown in FIG. 12B, a sharp edge portion 36d is formed on the end face, and when a high voltage is applied to the terminal 36,
Despite the insulation provided at a fixed interval D, dielectric breakdown (discharge) occurs from the edge portion 36d and the like, and the bobbin 32
There is a problem that the deterioration of the material is promoted.

An object of the present invention is to provide a transformer coil terminal capable of minimizing the occurrence of dielectric breakdown.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an exciting method using a first transformer coil and an iron core.
Connection between the winding of the second transformer coil and the output lead wire
And an end arranged at a fixed insulating distance from the iron core.
Child in the arrangement state,
The gist of the present invention is that an edge of a portion that is close to and opposes is formed in an R shape .

[0007]

SUMMARY OF Invention The present invention constructed as described above, the terminal
The part closest to and opposed to the iron core in the arrangement state
Is formed in an R-shape , there is no sharp edge, the electric field distribution when a high voltage is applied becomes gentle, and the occurrence of dielectric breakdown can be suppressed as much as possible.

Hereinafter, the present invention is embodied in a neon transformer.
It is described with reference to FIGS. 1 to 5 of one embodiment. As shown in FIG. 1, a coil 2 of a neon transformer is provided with a single-phase tripod core 3 (hereinafter simply referred to as an iron core) formed of a silicon steel plate, and a second transformer coil is provided above the main iron core 3a. The secondary coil 4 is inserted and supported by the main iron core 3a. The secondary coil 4 has, for example, eleven partition plates 5a to 5
The secondary coil bobbin 5 is divided into ten parts by k, and secondary coils 6a to 6j as windings wound around the secondary coil bobbin 5.

As shown in FIGS. 2 and 3, a fitting opening 7 is formed below the secondary coil bobbin 5.
A part of the terminal 8 described later is fitted into the terminal 8. The terminal 8 is insulated from the iron core 3 at a fixed interval D, and a protruding portion of the terminal 8 has a lead wire 9 led out from the secondary side coil 6j and a secondary wire as an output lead wire. The core wire 10a of the lead wire 10 is connected. The other secondary lead wire 10 and the lead wire 9 (not shown) derived from the coil 6a on the secondary side are similarly connected to terminals (not shown).

As shown in FIGS. 4 (a) and 4 (b), the terminal 8 is a rod-shaped lead wire terminal 1 having a circular cross section and made of steel.
1, a lead terminal 12 having a substantially M shape, and a rod-shaped connecting portion 13 connecting the lead terminal 11 and the lead terminal 12. The lead wire terminal 11 and the lead wire terminal 12 are formed by bending both ends of the connecting portion 13, and the ends of the terminals are formed in a round shape by header (upsetting) processing and are arranged in opposite directions. Have been.

[0011] The intermediate portion of the lead wire terminal 12 groove 12a to insert the secondary lead wire 10 is formed. Then, the secondary lead 10 after insert the core wire 10a into the groove portion 12a, by soldering, are connected to the terminal 8. As shown in FIG. 5, the lead wire terminal 11 has a concave portion 11a for winding the lead wire 9 at an intermediate portion thereof. Then, a part of the lead wire 9 is wound, and an extra wire is cut at an end of the concave portion 11a, and then the winding portion is soldered.
Connected to terminal 8.

As shown in FIG. 1, below the secondary coil bobbin 5, a primary coil 15 is inserted and supported. That is, the primary coil 15 is composed of a primary coil bobbin 16 and a primary coil 17 wound around the primary coil bobbin 16. Input leads 18a and 18b are led out to the coil 17 on the primary side. A pair of insulating plates 19 for insulating the secondary coils 6 a to 6 j are interposed between the iron core 3 and the secondary coil bobbin 5, and between the secondary coil bobbin 5 and the primary coil bobbin 16. A pair of insulating spacers 20 for insulating the primary coil 15 and the secondary coil 4 are inserted and arranged, and the insulating spacer 20 and the primary coil bobbin 16 are inserted.
A pair of leaky iron cores 21 is inserted and arranged between them.

As described above, the coil 2 includes the iron core 3, the secondary coil 4, the primary coil 15, the insulating plate 19, the insulating spacer 2
0, a leakage core 21 is provided. Next, the operation and effects of the terminals of the transformer coil configured as described above will be described.

With the lead wire 9 of the secondary coil 4 and the core wire 10a of the secondary lead wire 10 connected to the lead wire terminal 11 of the terminal 8 and the lead wire terminal 12, respectively, the input lead wire 18a , 18b are applied to the secondary coil 4 via the primary coil 15 and the iron core 3, for example.
Is excited, and a predetermined voltage (for example, 15 kv) is applied to the terminal 8 from the lead wire 9. And at the time of this application
Is the portion of the terminal 8 which is closest to and opposed to the iron core 3
(In FIG. 4, the connecting portion 13 and the end of the lead wire terminal 12 are shown.
Section) and the core 3 may cause dielectric breakdown (discharge).
was there. However, in this embodiment, the connecting portion 13 is formed in a circular cross section Rutotomoni, terminals 12 for lead wire
The end of is rounded by header processing.
The edge of the part that is closest to and opposes 3 is rounded.
doing. Therefore, the terminal 8 is fixed to the iron core 3.
There is no sharp edge at the portion opposing at the insulation interval D, and the electric field distribution in the terminal 8 becomes gentle, and the occurrence of dielectric breakdown is suppressed as much as possible.

Further, by minimizing the occurrence of dielectric breakdown, deterioration of the secondary coil bobbin 5 can be suppressed, and the service life can be increased. In addition, this invention is not limited to the said Example, You may use as follows.

[0016] (i) is provided with the groove 12a to the lead terminal 12 of the above embodiment the terminal 8, as shown in FIG. 6, the groove 12
a is omitted and the lead wire terminal 12 is used as a bar. (B) In the terminal 8 having the shape of FIG. 6, as shown in FIG.
In addition, both ends are not subjected to the header processing, and further, the concave portion 11a of the lead wire terminal 11 is omitted for use.

(C) As shown in FIG. 8, one end of the lead wire terminal 12 of the terminal 8 in the above embodiment is formed by bending without using a header. (D) The terminal 8 is used for a leakage transformer other than the neon transformer (such as a transformer for a burning appliance, a transformer for a lightning insecticide appliance, or a transformer for removing static electricity).

[0018]

According As described [devised effect above the pin of the transformers coil of the present invention, the most to the core in the arrangement
The edge of the part that is close and opposed is formed in an R shape,
Sharp edges from areas where discharge may occur during application
Since there are no parts, an excellent effect of minimizing the occurrence of dielectric breakdown when a high voltage is applied can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of a coil of a neon transformer according to an embodiment.

FIG. 2 is a partial perspective view showing a connection state of terminals of the secondary coil.

FIG. 3 is a partial cross-sectional view showing an installation state of terminals of the secondary coil.

FIG. 4A is a front view showing a terminal of a secondary coil according to the present embodiment, and FIG.
It is sectional drawing.

FIG. 5 is a side view showing terminals of the secondary coil.

FIG. 6 is a front view showing terminals of a secondary coil according to another embodiment.

FIG. 7 is a front view showing terminals of the secondary coil.

FIG. 8 is a front view showing terminals of the secondary coil.

FIG. 9 is a perspective view showing an appearance of a coil of a conventional neon transformer.

FIG. 10 is a partial perspective view showing a connection state of terminals of the secondary coil.

FIG. 11 is a partial cross-sectional view showing the installation state of the terminals of the secondary coil.

12A is a front view showing a terminal of a conventional secondary coil, and FIG. 12B is a sectional view of the terminal of the secondary coil taken along line AA.

[Explanation of symbols]

2 coils, 3 iron cores, 4 secondary coils, 5 secondary coil bobbins, 6a to 6j secondary side coils, 8 terminals, 9 lead wires, 10 secondary lead wires.

Claims (1)

(57) [Scope of request for utility model registration] 1. Excitation via a first transformer coil and an iron core
Connection between the winding of the second transformer coil and the output lead wire
And an end arranged at a fixed insulating distance from the iron core.
Child in the arrangement state,
A terminal of a coil for a transformer, wherein an edge of a portion opposing closely is formed in an R shape .