JPS58128714A - Transformer - Google Patents

Abstract

PURPOSE:To obtain a transformer of compact, lightweight and high in performance, by obtaining a winding structure in such a way that winding members each formed by arranging ribbon-like conductors having a proper width in parallel on an insulating film base are laid one on top of the other and simultaneously wound on the central leg of the iron core part. CONSTITUTION:On a film base 15 formed from a flexible insulating material having a necessary length L and a width D smaller than the length of a central leg part O, a plurality of ribbon-like conductors 16 are arranged and fixed in parallel to each other, longitudinally of the film base 15, with a space S maintained between the adjacent conductors 16 to form a winding member C. For example, two sheets of this winding member C are laid one on top of the other and simultaneously wound on the periphery of the central leg part O through a cylindrical bobbin 18 to form a winding structure K. The ribbon conductors 16 are connected in series at both ends of the film base 15 so that the conductors 16 arranged on the film base 15 constitute a primary winding. On the other hand, ribbon-like conductors 17 arranged on a film base 20 are similarly connected in parallel at both ends thereof so as to constitute secondary windings. Thus, it is possible to obtain a transformer of compact, lightweight and high in performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small-sized, high-performance transformer using a film-shaped ring body, and particularly to a transformer suitable for relatively low voltage applications.

In conventional transformers, the primary winding was constructed by insulating wires or rectangular copper plates arranged in a coiled manner. Therefore, the primary and secondary windings are usually wound separately, especially in welding transformers where the turns ratio between the primary and secondary is large and the cross-sectional area of these conductors is large. If there was a big difference, the primary winding and the secondary winding would not face each other closely, resulting in large leakage magnetic flux and a large overlap in the shape of the transformer. Such leakage magnetic flux deteriorates the power factor of the transformer, and the output side suffers from standing-up and deteriorates the performance of the transformer.

This invention was made in view of the point noted in Y. A suitable number of ribbon-shaped conductors of a very small size and appropriate width are arranged in parallel in the longitudinal direction of the film on a flexible insulating film, and the conductors are fixed to the film in secret or A small, lightweight, high-performance transformer is provided by simultaneously stacking a plurality of elongated winding bodies formed by printing and winding them around the central leg iron part of the iron core part to form a winding part.

Examples will be explained below with reference to the drawings.
FIG. 4 shows a plurality of iron core blocks 1.2. ~． 13, 14, etc., showing the outer iron core part F of three examples of transformers, and the transformer is constructed by winding the winding body described below around the middle lost iron part '0. It is something.

- Fig. 5 shows an embodiment of the winding body C according to the present invention, which is attached to a film base 15 formed of a flexible insulating material having a width D less than the length of the central leg iron part O and a required length. A plurality of ribbon-shaped conductors 16 having an appropriate width d are arranged and fixed in parallel in the longitudinal direction of the film base 15 at intervals S, for example. In this case, the film base 15 is a synthetic resin film such as a polyester film, and its stiffness is determined by the withstand voltage, current capacity, etc. of the transformer. The ribbon conductor 16 may also be a printed wiring depending on its required current capacity. In any case, as long as the conductor is flat, it may be a ribbon-like conductor made up of thin round conducting wires.

FIG. 6 shows two winding bodies C shown in FIG. 5 stacked together and wound simultaneously around the central leg iron part O shown in FIGS. 1 to 4 via a cylindrical bobbin 18. The figure shows a longitudinal section of only the winding structure in the state, and in the figure, the ribbon-shaped conductors 16 arranged on the film base 15 are connected at both ends of the film base 15 to form, for example, the primary winding. Ribbon-shaped conductors 16 are connected in series. Further, the ribbon-shaped conductors 17 arranged on the film base 20 are similarly connected in parallel at both ends to form a secondary winding.
The number of parallel connections is determined by the winding ratio between the primary winding and the secondary winding.

In FIG. 7, one ribbon-shaped conductor 22, which is arranged in a large number on one film base 21, is used as one winding on the side winding, and one ribbon-shaped conductor 23 is used as a secondary winding in the figure in which the ribbon-shaped conductor 22, which has a large width e and is arranged in a small number, is used as a secondary winding. Similarly to the film base 21, a ribbon-shaped conductor 22.
Another film base 24 (FIG. 8) on which 23 are arranged is provided, and it is turned upside down so that the appropriate number of ribbon conductors 22 and ribbon conductors 23 correspond to each other.
- As shown in FIG. 8, this is an embodiment in which a film base 21 and a film base 24 are overlapped and simultaneously wound around a bobbin 25 to form a winding structure K in the same manner as in the case of FIG. 6 described above.

Figure 9 shows two wide ribbon conductors 26 and 27, one each.
This figure shows a winding body C made of film bases 28 arranged in a row, and this is used as a secondary winding, and the winding body C made of film bases 15 shown in FIG. 5 is shown in FIG. 10 as a primary winding. As shown, a winding structure K is formed by simultaneously winding the wire over the bobbin 29 in the same manner as in FIG.

A transformer is completed by combining the coil structure shown in FIGS. 6, 8, and 10 with the iron core F shown in FIGS. 1 to 4.

Figures 11 and 12 show the structures at both ends of the film base 15, 21, 28, etc. shown in Figures 5, 7, and 9 being bent or The ends of the ribbon-like conductor 30 can be easily connected by folding back, and the ribbon-like conductors 31 at the end portions can be connected as required. In the example shown in FIG. 12, it is necessary to bend the film base 32 so that the insulating surfaces of the ribbon conductors 33 are overlapped so that the ribbon conductors 33 are not short-circuited.

13 and 14 show the bent end portion 35 of the film base 34. , '36 is shown in the winding #4 structure with these terminals 35.3 protruding from the ends.
6 by electric wire! ? The number of turns, that is, the turn ratio, and the current capacity can be set to any size by appropriately connecting them to the .

Also, in the middle of the film base 15, etc., bend it at right angles to the longitudinal direction of the film base 15, stand it up, bend it again, and bend it in a direction that does not short-circuit the ribbon-shaped conductor body 16. In each of the following embodiments, two of the same winding bodies C are used as the primary and secondary sides, and one of the ribbon-shaped conductors 16 and 17 is connected in series. and the other may be connected in parallel. For example, 8 as the primary side.
Stack 20 layers of the winding C in which the +11 foil-like ribbon conductors 16 are embedded and the winding C in which all 8 rows of the 8 rows of ribbon conductors 17 are connected in parallel, and wind them onto the bobbin at the same time. If the primary side is 160 turns and the secondary side is 20 turns, 1
If 200V AC is applied to the secondary side, 200VX will be applied to the secondary side.
An AC output of 20/160 = 25V is obtained.

Moreover, in the above, the ribbon-shaped conductors can be connected in parallel or series as appropriate to form a transformer according to the transformation ratio and the primary and secondary current capacities.

As described above, according to the present invention, the winding section includes a primary winding and a secondary winding, and an iron core section consisting of a plurality of core blocks interlinked with the winding section, and the winding section has an insulating property. A plurality of winding bodies each consisting of one or more ribbon-shaped conductors arranged and fixed at appropriate intervals along the longitudinal direction of the film base are overlapped and simultaneously wound along the central leg iron part of the iron core part. Since the transformer is characterized in that the winding structure is formed with a plurality of windings, and the ribbon-shaped conductors are appropriately connected at at least both ends of the winding body, the primary winding and the secondary winding are By winding the winding with ribbon-shaped conductors alternately adjacent to each other, the occupation rate of the conductor in the window of the iron core is increased, and the conductor is thinner than a round wire or a rectangular wire. The number of leakage magnetic flux is small, the interlinking ability of the primary and secondary magnetic lines of force is increased, and the opposing area of the primary and secondary is equivalent to connecting parallel capacitors, resulting in a good power factor. As a result, a welding transformer with extremely high performance and a rise curve that can be adapted to electronic control with precise characteristics can be obtained. Furthermore, impregnation and oiling of the windings are not necessary.

In addition, since the winding body can be wound around the central leg iron part smoothly or via a rotatable bobbin around the central leg iron part after the winding body is wound on the iron core part, the iron core part is seamless. A strip-shaped transformer can be used, and therefore leakage magnetic flux and magnetic resistance of the magnetic circuit are small, resulting in a highly efficient and compact transformer.

Moreover, it can be applied not only to small welding transformers, but also as charging transformers for 12V and 24V storage batteries, and low-voltage 11 transformers such as electric transformers for low-voltage, large-current motors for submersible pumps.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the invention can be practiced in modes other than the above-mentioned embodiments.

[Brief explanation of drawings]

The drawings are all related to this invention; Figure 1 is a plan view of an example of the iron core of a transformer, Figure 2 is a front view of Figure 1, and Figure 2 is a front view of Figure 1.
FIGS. 3 and 4 are plan views of other examples of the iron core of the transformer, and FIGS. 5, 7, and 9 are plan views of film-based embodiments, respectively, and FIG. FIGS. 8 and 10 are longitudinal sectional views of an embodiment of a winding structure formed by overlapping winding bodies formed by film bases,
11 and 12 are plan views showing examples of the shapes of both ends of the film base, FIG. 13 is a plan view of the winding structure showing the position of the end portion of the film base in the coil structure, and FIG. The figure is a front view of FIG. 13. (Explanation of symbols representing main parts of the drawing) 1 to 14...
・Iron core block 15.20, 21.24...Film base 16.1
7... Ribbon-shaped conductor F... Iron core C... Winding body 0... Central leg iron part K... Winding structure 1 Fig. 2 Fig. 3 Fig. 4 Fig. 2. 9 Figure 5 Figure 6

Claims (1)

[Claims] an iron core section consisting of a plurality of iron core blocks interlinked with a winding section consisting of primary and secondary windings; A plurality of winding bodies formed by arranging and fixing ribbon-shaped conductors at appropriate intervals are stacked and wound simultaneously along the central leg iron part of the iron core part to form a winding structure, and the winding bodies are A transformer characterized in that the ribbon-shaped conductors are appropriately connected at least at both ends.