KR19990039873A - Coil winding structure of flyback transformer - Google Patents

Abstract

The present invention relates to a coil winding structure of a flyback transformer. The present invention relates to a flyback transformer including a plurality of wound primary windings and secondary windings, each of which is wound at a predetermined winding ratio on a first core and a second core made of a magnetic material. In the coil winding structure, the secondary winding is composed of an FPCB coil that is laminated and bonded a plurality of times to the second core, that is, the first and second cores each made of a magnetic material wound a plurality of times at a predetermined winding ratio. In the primary winding and the secondary winding, the secondary winding is molded into a structure in which the secondary winding is laminated as a FPCB coil, thereby preventing parasitic capacitance caused by the uniform coil winding, so that the ringing ratio of the primary pulse and the secondary high voltage regu1ation can be prevented. It is possible to improve the, and there is an excellent effect that the reliability of the product is further improved.

Description

Coil winding structure of flyback transformer

The present invention relates to a coil winding structure of a flyback transformer, and more particularly, to a secondary core made of a magnetic material, a secondary side winding wound a plurality of times at a predetermined winding ratio to form a structure in which a coil is laminated and laminated to form a coil. The present invention relates to a coil winding structure of a flyback transformer capable of maintaining stable characteristics.

In general, a flyback transformer refers to a single-circuit transformer for obtaining a high voltage for a water pipe using pulses generated during the return period of a horizontal deflection output in a television receiver, also called a horizontal output transformer.

Conventional flyback transformers as defined above can be used in a variety of applications, in particular, to generate a high voltage using a horizontal synchronization signal in a television receiver, it is also widely used in oscilloscopes and monitors.

Referring to FIG. 1, a coil winding structure of a flyback transformer according to the related art used for this purpose is as follows.

1 is a perspective view showing a coil winding structure of a general flyback transformer.

As shown in FIG. 1, the coil winding structure of the flyback transformer according to the related art includes a primary winding 30 wound around a plurality of times by a first core 10 having a substantially d-shaped (C) shape and the first winding. It consists of a secondary side winding 40 wound a plurality of times on a second core 20 positioned in a shape facing the first core 10.

In this case, the flyback transformer is generally configured such that a core made of a magnetic material magnetically connects the primary side winding 30 and the secondary side winding 40, and the primary side winding 30 and the secondary side winding 40 The degree of boosting is determined by the ratio.

Here, it can be seen that the primary winding 30 and the secondary winding 40 are each wound around the first core 10 and the second core 20 by a predetermined winding ratio by using a copper wire coil. .

That is, the primary winding 30 and the secondary winding 40, the copper wire coil to the first core 10 and the state of maintaining a predetermined temperature (38 ℃ ± 1) so that the winding is good It is to be used by winding a plurality of times to the second core 20, respectively.

On the other hand, the first core 10 and the second core 20 made of a magnetic body to which the primary winding 30 and the secondary winding 20 are wound are thin silicon steel sheets in order to reduce the loss of magnetic lines and heat generation. The primary winding 30 is wound around 150 to 500 times the copper coil having a diameter of 0.5mm to 1.0mm to facilitate heat dissipation, and the secondary winding 40 is 0.05 The copper coil of mm to 0.1 mm is wound about 13000 to 20,000 times, so that the ratio between the primary winding 30 and the secondary winding 40 is typically about 60 to 100.

However, since the primary side winding 30 and the secondary side winding 40 of the flyback transformer according to the prior art generating high pressure use the above-described bar and ground copper high heat, a complicated manual operation in winding the copper coil is difficult. In addition, there was a big disadvantage that the insulation breakdown voltage cannot be secured due to parasitic capacitance.

In addition, there is a big disadvantage that the reliability of the product is significantly reduced due to the generation of voids (void) due to the winding of the copper wire is severely damaged.

In addition, since the copper wire coil is used, the volume increases, the weight becomes heavy, the efficiency is low, and there is a disadvantage in that the high voltage regulation is greatly reduced.

Thus, the present invention was created to solve the above problems, the object is that the FPCB coil of the shape provided with a conductor pattern between the upper and lower insulating film formed of a polyimide-based second magnetic material The present invention provides a coil winding structure of a flyback transformer having a structure in which the core is wound a plurality of times at a predetermined winding ratio so that parasitic capacitance is not generated, thereby improving reliability of the product.

1 is a perspective view showing a coil winding structure of a typical flyback transformer

Figure 2 is a perspective view showing the coil winding structure of the flyback transformer according to the present invention

3 is a plan view showing an FPCB coil applied to a flyback transformer according to the present invention.

4 is an enlarged cross-sectional view of a-a 'of FIG.

* Explanation of symbols for main parts of the drawings

10: first core 20: second core

30: primary winding 40: secondary winding

100: FPCB coil 110: bottom thin film insulating film

120: conductor pattern 130: upper thin film insulating film

a, b: exposed conductor

The flyback transformer according to the present invention for achieving the above object is a flyback transformer comprising a primary side winding and a secondary side winding each wound a plurality of times in a predetermined winding ratio on the first core and the second core made of a magnetic material In the coil winding structure, the secondary winding is a basic feature of the technical configuration that the secondary winding is an FPCB coil laminated to the second core a plurality of times.

In the above configuration, the FPCB coil includes a bottom thin film insulating film having a substantially circular ring shape, a conductor pattern printed on the bottom thin film insulating film a plurality of times at equal intervals in a ring shape, and the conductor pattern interposed therebetween. A top thin film insulating film which is bonded to the bottom thin film insulating film by high frequency induction heating, and a part of the top thin film insulating film which is positioned at the outermost and innermost edges of the conductor pattern printed in a ring shape on the bottom thin film insulating film, respectively. It is preferable to comprise a plurality of conductor exposed portions exposed locally by stripping.

Hereinafter, a preferred embodiment of the flyback transformer according to the present invention will be described with reference to FIGS. 2 to 4.

Figure 2 is a perspective view showing the coil winding structure of the flyback transformer according to the present invention, Figure 3 is a plan view showing a pattern coil applied to the flyback transformer according to the present invention, Figure 4 is an enlarged view of a-a 'of FIG. In the figure, reference numeral 100 in the figure indicates the FPCB coil as the secondary winding.

As shown in FIG. 2, the coil winding structure of the flyback transformer according to the present invention includes a primary side winding wound around the first core 10 and the second core 20 made of a magnetic body a plurality of times at a predetermined winding ratio. 30) and the secondary winding 100.

In this case, the secondary winding 100 is to use the FPCB coil 100 laminated to the second core 20 multiple times, this FPCB coil 100 is shown in Figs. As described above, a polyimide-based bottom thin film insulating film 110 having a substantially disc-shaped ring shape and a conductor pattern 120 printed on the bottom thin film insulating film 110 at a plurality of patterns at equal intervals in a ring shape. ), The top thin film insulating film 130 which is bonded to the bottom thin film insulating film 110 by high frequency induction heating with the conductor pattern 120 interposed therebetween, and the ring pattern on the bottom thin film insulating film 110. It consists of a plurality of conductor exposed parts (a), (b) exposed by peeling a part of the upper thin film insulating film 130 respectively located at the outermost and innermost edge of the printed conductor pattern 120.

Referring to the coil winding operation of the flyback transformer according to the present invention configured in such a shape as follows.

First, the primary coil 30 is wound several times on the first core 10 to form the primary winding 30, and then the FPCB coil is formed on the second core 20 so as to correspond to the winding ratio with the primary winding 30. A plurality of stacks of 100 are sandwiched.

In this case, since a plurality of conductor exposed portions (a) and (b) are provided on the upper surface of the FPCB coil 100, when the electrical connection between the plurality of other FPCB coils 100 stacked up and down is desired. By soldering the conductor exposed portions (a) and (b) to each other, the ratio of the secondary winding 100 can be easily adjusted.

As described above, the coil winding structure of the flyback transformer according to the present invention includes the secondary winding in the primary winding and the secondary winding, which are each wound a plurality of times at a predetermined winding ratio to the first core and the second core made of a magnetic material. It is possible to maintain a stable characteristic of the coil and at the same time have an excellent effect of automating the production by molding the structure into a laminated structure coupled as an FPCB coil.

In other words, it is possible to accurately maintain the winding interval of the secondary winding has a useful effect of further improving the reliability of the product by preventing parasitic capacitance.

In addition, since the secondary core is molded into a structure in which the secondary core is laminated in a thin film form, the wound volume can be minimized and the coil winding work process can be further simplified.

Claims (2)

In the coil winding structure of a flyback transformer comprising a primary side winding and a secondary side winding each of which is wound a plurality of times at a predetermined winding ratio on a first core and a second core made of a magnetic material, the secondary winding is the second winding. A coil winding structure of a flyback transformer, characterized in that the FPCB coil laminated to the core multiple times. The FPCB coil according to claim 1, wherein the FPCB coil includes a bottom thin film insulating film having a substantially circular ring shape, a conductor pattern printed on the bottom thin film insulating film a plurality of times at equal intervals in a ring shape, and the conductor pattern therebetween. And a portion of the upper thin film insulating film positioned at the outermost and innermost edges of the conductive pattern printed in a ring shape on the bottom thin film insulating film and bonded to the bottom thin film insulating film by high frequency induction heating. A coil winding structure of a flyback transformer, characterized by comprising a plurality of conductor exposed portions exposed respectively by local peeling.