JPS61181110A - Transformer - Google Patents

Abstract

PURPOSE:To realize reduction in size through elimination of space between the primary winding and secondary winding and unnecessitating clearance for fitting between the primary bobbin and secondary bobbin by forming a secondary bobbin on the winding wound on the primary bobbin and forming a winding thereon. CONSTITUTION:A primary winding 11 is wound around the primary bobbin 14 and secondary bobbin 15 is formed on such primary winding 11 using molding resin. This secondary bobbin 15 is formed closely with the primary winding 11. Next, a secondary winding 12 is wound on such secondary bobbin 15 and these are comprised in a magnetic core 13, thus forming a transformer. Thereby, the transformer can be remarkably reduced in size and formed within a very short period. This transformer also assures a longer operating life and provides less leakage flux.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention mainly relates to a transformer in which a plurality of windings are arranged concentrically to step up and down the voltage of an input signal.

Prior Art A circuit diagram and a structural diagram of a conventional transformer are shown in FIGS. 5A and 5B. In Figure 5, 1 is the primary winding, 2 is the secondary winding,
3 is a magnetic core, 4 is a primary bobbin, 5 is a secondary bobbin, and 6 is a clearance required when fitting the primary bobbin 4 and the secondary bobbin 5.

A method for assembling the transformer configured in this manner will be described below. First, place the next winding 1 on the primary bobbin 4.
is wound to complete the winding.

Next, the secondary winding 2 is wound on the secondary bobbin 5 to complete the winding. Furthermore, the primary bobbin 4 around which the primary winding 1 is wound is fitted inside the secondary bobbin 5 around which the secondary winding wA2 is wound, and these are incorporated into the magnetic core 3 to complete a transformer.

Problems to be Solved by the Invention In such a conventional transformer, in order to prevent the surface of the primary winding 1 from being damaged, the winding must be lower than the height of the collar of the primary pobbin 4, and the inside of the window of the transformer must be lowered. This creates an ineffective space in the transformer, making it difficult to downsize the transformer.

Furthermore, in order to fit the primary bobbin 4 and the secondary bobbin 5, a fitting clearance 6 is required, which also makes it difficult to downsize.

Furthermore, since the inner diameters of the primary bobbin 4 and the secondary bobbin 5 are different, two types of winding shafts are required to fix each bobbin when winding each winding wire, which increases the equipment cost for the winding shafts. .

Furthermore, since the primary winding 1 and the secondary winding 2 are wound in two parts, the work of attaching and removing them to the winding shaft is required twice, which increases the working time.

In addition, in high-voltage transformers, etc., when insulating material is injected into and around the transformer, minute voids are likely to occur in the space between the primary winding 1 and the secondary bobbin 5, and these voids are caused by high electric fields. Because corona discharge occurs inside the void, the insulation material around the void is destroyed, causing insulation deterioration and significantly shortening the lifespan.

In order to maintain a long service life in such a high voltage transformer, the material thickness of the secondary bobbin 5 must be increased, and it is difficult to miniaturize it. Furthermore, since the primary winding and the secondary winding are separated from each other, leakage flux increases and various characteristics of the transformer deteriorate.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention molds a secondary bobbin using a molding resin on the winding wire wound on the primary bobbin. A transformer is constructed by winding a wire around the

Effect: With the above configuration, there is no space between the primary winding and the secondary bobbin, allowing the transformer to be miniaturized. In addition, since there is no need for fitting clearance between the primary bobbin and secondary bobbin,
The transformer can be made smaller. Furthermore, since there is no need to make the thickness of the secondary bobbin unnecessarily thick, the size can be reduced. Further, since there is no need to explain the primary bobbin from the winding shaft, the work*W can be shortened, and since only one type of winding shaft is required, the equipment cost can be reduced. In addition, in high voltage transformers, 1
Since the secondary bobbin is formed on the secondary winding, there are no voids and no corona occurs, resulting in a long life. Furthermore, since the primary winding and the secondary winding are brought close to each other, the degree of coupling is improved, leakage flux is reduced, and various characteristics of the transformer are improved.

EXAMPLE An example of the present invention will be described below based on the drawings. 1st
Figure A shows one embodiment of the structure of the transformer of the present invention, and the first
Figure B shows an enlarged view of the main part C.

In Figure 1, 11 is the primary winding, 12 is the secondary winding, 1
3 is a magnetic core, 14 is a primary bobbin, and 15 is a secondary bobbin molded on the primary winding 11 using a molding resin.

The method of assembling a transformer having this structure is as follows. The primary winding 11 is wound on the primary bobbin 14, and the secondary bobbin 15 is molded on the primary winding 111 using a molding resin. At this time, the secondary bobbin 15 is molded in close contact with the first winding s*ii, as shown in FIG. 1B. Next, the secondary winding 12 is wound onto this secondary bobbin 15. These are incorporated into the magnetic core 13 to complete the transformer.

FIG. 2 shows another embodiment of the structure of the transformer of the present invention.

In Figure 2, the height of the collar of the primary bobbin 24 is 2 circumferences a.
22, and the collar of the secondary bobbin 25 is omitted.

3A and 3B are circuit diagrams and configuration diagrams showing other embodiments of the structure of the transformer of the present invention, in which the primary bobbin 34 is the same as that in FIG. 1, and the secondary bobbin 35 has a plurality of secondary Volume @32a
, 32b are wound, and the secondary bobbin 35 has a collar in the center that separates the secondary windings 32a and 32b.

FIG. 4 shows another embodiment of the structure of the transformer of the present invention,
The height of the collar of the primary bobbin 44 is the height of the secondary winding 42a.

42b, the ribs at both ends of the secondary bobbin 45 are omitted, and the secondary bobbin 45 has a rib separating the secondary windings 42a and 42b.

Effects of the Invention As stated above, according to the present invention, it is possible to obtain a transformer that can be extremely miniaturized, requires short working time, has low equipment costs such as winding shafts, has a long life, and has low leakage flux. , extremely useful.

[Brief explanation of drawings]

1A and 1B are configuration diagrams of a transformer according to one embodiment of the present invention and an enlarged view of its essential parts, FIG. 2 is a configuration diagram of another embodiment of the present invention, and FIGS. 3A and B are still another embodiment FIG. 4 is a circuit diagram and a configuration diagram of another embodiment, and FIGS. 5A and 5B are a circuit diagram and a configuration diagram of a conventional transformer. 11...Primary winding, 12.22.32a, 32b
, 42a. 42b...Secondary winding, 14.24.34.44...
1st bobbin, 15.25.35.45...Second bobbin agent Yoshihiro Morimoto Fig. 1 II---/3 Z comb tz---z;xS Fig. 2 Fig. 3 Figure 4 Figure 6

Claims (1)

[Claims] 1. A transformer in which a winding wire is wound on a primary bobbin processed into a predetermined shape, a secondary bobbin is molded on the winding wire using a molding resin, and the winding wire is wound on this secondary bobbin. .