JPH04181708A - Converter transformer - Google Patents

Abstract

PURPOSE:To reduce costs by decreasing operating manhours and to achieve miniaturization by dividing the bobbin into 3 sections and winding a coil around each of them and then combining them. CONSTITUTION:A core 8 is insulated by a bobbin 9 and a coil 10 is wound around to form the basic structure. Next, the primary coil 14 and the secondary coil 15 are respectively wound around the internal bobbins A11 and B12 and are held in place by penetrating the bore of the outer bobbin 13, and after the remaining coil is wound around the external bobbin 13, this unit is combined with the core 8. As a result, the primary coil 14 and the secondary coil 15 respectively wound around the internal bobbins A11 and B12 eliminate the spacer tape 17 and the coil cover 16. This makes it possible to reduce the cost and size.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a converter transformer used in consumer or industrial electronic equipment.

BACKGROUND ART A conventional converter transformer has a configuration as shown in FIGS. 8 to 9. A conventional converter transformer will be explained below with reference to the drawings.

FIG. 8 is a perspective view of a conventional converter transformer, which has a structure in which a coil 3 is wound around a core 1 with a bobbin 2 in a completely loose manner. FIG. 9 shows a cross-sectional view showing the structure in detail. The primary coil 4 and the secondary coil 5 are wound around the bobbin 2 with positioning spacer tape 7 applied to both ends of the coil, and a coil cover 6 is applied between each coil for insulation.
The structure was a combination of.

Problems to be Solved by the Invention In such a conventional configuration, each coil requires a spacer tape 7 and a coil cover 6, and as the number of coils increases, the number of man-hours increases, and the cost and shape become large.

The present invention is intended to solve these problems, and aims to reduce the cost and size of the converter transformer by reducing the number of man-hours required.

Means for Solving the Problems In order to solve this problem, the present invention has a structure in which the bobbin is divided into three parts, each of which is wound with a coil.

Effect With the above configuration, the coils are insulated by the bobbin, so the spacer tape and coil cover can be significantly reduced.

Example Hereinafter, the present invention will be explained in detail based on examples.

1 to 3 show a converter transformer according to an embodiment of the present invention, and FIG. 1 is a perspective view showing a structure in which a core 8 is insulated with a bobbin 9 and a coil 10 is wound around it. Figures 2 and 3
The figure is a cross-sectional view and a configuration diagram showing the structure in detail.Inner bobbin A]1. The core 8 is wound in the inner bobbin B12 with the primary coil 14 and the secondary coil 15, respectively, and fixed by being inserted into the inner diameter part of the outer bobbin 13, and the remaining coils are wound around the outer bobbin 13. It had a combined structure. With this configuration, the inner bobbin A11. The spacer tape 17 and coil cover 16 can be omitted from the primary coil 14 and secondary coil 15 wound around the inner bobbin B12, and costs can be reduced by reducing the number of man-hours.

FIG. 4 shows another embodiment of the invention.

In FIG. 4, inner bobbin A11. Inner bobbin B12
Each has a plurality of flanges 18 and 1.9 on its body, and a coil is wound between the flanges 18 and 19.

With this configuration, the coil is wound between the flanges 18 and 19, making it easy to wind the coil, and it is also possible to eliminate the insulating tape between the coils.

FIG. 5 shows still another embodiment of the present invention.

In FIG. 5, inner bobbin A11. Inner bobbin B 1
．． Reference numeral 2 denotes a flange 2 having dimensions approximately equal to the inner diameter of the outer bobbin 13.
0.21. With this configuration, inner bobbin A11° inner bobbin B1
2 and the outer bobbin 13 are improved, and the dimensional accuracy of the converter transformer can be improved.

FIG. 6 shows another embodiment of the invention.

In FIG. 6, the structure is such that the dimension of the core gap 22 at the abutting portion of the core 8 inserted into the coil is smaller than the dimension of the gap between the inner bobbin All and the inner bobbin B12. With this configuration, a large amount of leakage magnetic flux coming out of the core gap 22 does not pass through the coil part wound around the inner bobbin A I '1 and the inner bobbin B12, so heat generation in the coil part due to the proximity effect is reduced. can be suppressed.

Further, FIG. 7 shows an embodiment having the same effect.

In FIG. 7, the inner bobbin All and the inner bobbin B12
The outer bobbin 13 has a gap regulating portion 23 on its inner diameter portion that regulates the gap size between the core gap 22 and the core gap 22 so that the gap size is larger than the core gap 22 size. With such a configuration, the gap can be controlled more reliably.

Effects of the Invention As described above, the converter transformer according to the present invention can be reduced in cost and size by dividing the bobbin into three parts. Furthermore, by changing the overall length of the outer bobbin, the overall length of the converter transformer can be arbitrarily selected by simply changing the core, making it easier to meet a wide range of user needs. Next, the influence of leakage magnetic flux from between the core gaps can be structurally prevented, and heat generation in the coil portion can be reduced. In addition, since the bobbin is divided, the coil can be constructed in a separate process, and depending on the coil specifications, the coil part can be shared between different types of transformers, which is effective for standardization and improves overall performance. Manufacturing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the converter transformer of the present invention, Fig. 2 is a sectional view of the converter transformer, and Fig. 3 is a sectional view of the converter transformer.
The figure shows its configuration, Figures 4 to 7 are structural diagrams and cross-sectional views on the true flow side, Figure 8 is a perspective view of a conventional converter transformer, and Figure 9 is a cross-sectional view of the same converter transformer. . 8...core, 11...inner bobbin A,
12...Inner bobbin B, 13...Outer bobbin, 14...Primary coil, 15...
・Secondary coil, 16...Coil cover, 17・
・・・・・・Spacer tape, 18.19゜20.21・
... Tsuba, 22 ... Core gap, 23.
...Gap regulation section. Name of agent: Patent attorney Haruaki Koba and 2 others Figure 1 Figure 2 @ 3 Figure 4 Figure 6 Figure 8 - Core Figure 7 δ - Core 11 - One inside bopin A Figure 8?

Claims (5)

[Claims] (1) One winding is provided on one side of the inner bobbin that is separated at the middle part in the winding direction, and the other winding is provided on the other inner bobbin, and this inner bobbin is positioned and incorporated into the inner diameter part from both sides. A converter transformer consists of a coil section made by winding the outer bobbin, and a closed magnetic circuit magnetic core built into this coil section. (2) The converter transformer according to claim (1), wherein a plurality of flanges are provided on the winding portion of the inner bobbin. (3) The converter transformer according to claim (2), wherein at least one of the plurality of flanges of the inner bobbin has a size substantially equal to the inner diameter of the outer bobbin. (4) The converter transformer according to claim (1), wherein a gap is provided between the abutting portions of the magnetic legs of the closed magnetic circuit core inserted into the coil portion, so that the gap between both inner bobbins is larger than the gap. (5) The converter transformer according to claim (4), further comprising a gap regulating portion for regulating the gap between the inner bobbins, which is provided on the inner diameter portion of the outer bobbin into which the inner bobbin is fitted.