KR200432013Y1 - High voltage transformer - Google Patents

Abstract

The present invention relates to a high voltage transformer, the internal and external facing magnetic core; A core-shaped hollow core holder portion having a core inserted at both ends and holding and supporting the opposing magnetic core, and a plurality of primary coil winding portions of a predetermined interval by a partition wall formed around the core holder portion and a plurality of predetermined intervals. A bobbin provided with a coil winding portion formed of secondary coil winding portions of a plurality of divided sections by the dividing wall; The core support is formed to protrude and extend from both ends of the coil winding part to a predetermined width and depth, and the extension width thereof is the same as the width of the core in which the core installed in the core holder part is exposed and supported to the outside.

Transformer, bobbin, magnetic core, split wall, primary coil winding, secondary coil winding, core support, slit, center core, outer core, recess

Description

High Voltage Transformers {HIGH VOLTAGE TRANSFORMER}

1 is an exploded perspective view of a high voltage transformer to which the bobbin structure according to the present invention is applied;

2 is a plan view of FIG. 1 showing a high voltage transformer;

3 is a side view of FIG. 1 illustrating a high voltage transformer.

<Explanation of symbols for the main parts of the drawings>

100: transformer bobbin

100A; Primary coil winding

100B: secondary coil winding

110: partition wall

110a: hollow

110b, 110c: recessed

120a, 120b: Split section of coil winding

130: slit

150: core support

150a: core support top surface

200: magnetic core

200a: center core

200b, 200c: outer core

The present invention relates to a high voltage transformer, and more particularly, to prevent insulation breakdown between the high voltage coil winding and the low voltage coil winding and within the high voltage coil winding in a high voltage transformer that increases or decreases an AC voltage by using electromagnetic induction. In addition, the present invention relates to a high voltage transformer employing a bobbin structure that realizes the core mounting structure, thereby stably maintaining the electromagnetic characteristics of the transformer, and doubles the relative cross-sectional area of the core and the high-voltage winding to increase the efficiency of the high-voltage transformer.

Transformers use electromagnetic induction to measure the value of alternating voltages or currents and are commonly used as transformers.

Typically, such a transformer is used as a transformer bobbin consisting of a low voltage primary coil winding and a high voltage secondary coil winding, and a path of magnetic induced magnetic flux by electromagnetic induction action of current applied to the low voltage primary coil. And a magnetic core that induces the magnetically induced magnetic flux back to the high voltage current of the secondary coil.

The magnetic core is fixedly mounted on the low pressure side and the high pressure side of the transformer bobbin using core pairs such as E-E type and E-I type.

Such opposing magnetic cores inevitably or intentionally have an installation tolerance (or air gap) between the magnetic cores as a path of movement of electromagnetic induced magnetic flux.

Here, the inevitable installation tolerance of the magnetic core pair means a natural installation tolerance according to the structural mounting tolerance between the two when the core pair is installed in the bobbin, and the intentional tolerance causes electromagnetic leakage more than the magnetic field strength of the core because it causes leakage flux. Means a small tolerance intentionally given to prevent saturation of the core or short circuit of the coil when it is made.

For improved performance and stability of transformers, it is necessary to keep these tolerances or air gaps very small and constant even after the installation of magnetic core pairs, since changes in leakage flux can have a significant effect on electromagnetic induction with the surroundings.

The transformer ratio, current ratio, and the like are determined according to the coil winding ratio of the transformer, which satisfies the following relationship.

a = w1 / w2 = V1 / V2 = I2 / I1 (a: number of turns, w1: number of turns of primary coil, w2: number of turns of secondary coil, V1: input voltage, V2: output voltage, I2: secondary coil Current at, I1: current at the primary coil)

In other words, when the winding ratio of the secondary coil to the primary coil is increased, the output voltage of the high pressure is increased, and the current flowing in the secondary coil is smaller than the current flowing in the primary coil, and therefore, the coil on the secondary coil side The thickness can be formed much thinner than the primary coil side.

These transformers satisfying the above relationship have improved winding ratio compared to the same standard, that is, relative expansion of high voltage coil windings, insulation between coil windings, heat dissipation of heat generated from coil windings, and leakage due to stable mounting of magnetic core. Reduction of magnetic flux, maintenance to a constant value, and suppression of changes in the electromagnetic field affecting coils and external connection terminals, which are peripheral elements, are necessary conditions for improving the performance.

The present invention has been made to solve the above-mentioned problems of the prior art, the object of which is to prevent insulation breakdown between the high voltage coil winding portion and the low pressure coil winding portion and in the high voltage coil winding portion, and realize the seating structure of the core Accordingly, to provide a high voltage transformer employing a bobbin structure that can stably maintain the electromagnetic characteristics of the transformer and increase the efficiency of the high voltage transformer by doubling the relative cross-sectional area of the core and the high voltage winding.

In order to achieve the above object, the present invention is a high voltage transformer, the internal and external facing magnetic core; A core-shaped hollow core holder portion having a core inserted at both ends and holding and supporting the opposing magnetic core, and a plurality of primary coil winding portions of a predetermined interval by a partition wall formed around the core holder portion and a plurality of predetermined intervals. A bobbin provided with a coil winding portion formed of secondary coil winding portions of a plurality of divided sections by the dividing wall; The core support is formed to protrude and extend from the both ends of the coil winding to a predetermined width and depth, the extension width is provided with a high voltage transformer, characterized in that the core installed in the core holder portion is equal to the width of the core exposed to the outside do.

According to an embodiment of the present invention, the depth of the coil support is characterized in that the depth to form a separation interval such that the electromagnetic influence of the coil and the core wound around the winding portion does not reach the periphery.

According to one embodiment of the present invention, the outer magnetic core is installed on the outer wall of the dividing wall around the outer periphery of the core holder portion, and the outer wall has a recess having a width corresponding to the width of the outer core so that the outer magnetic core is seated and installed. Characterized in that formed.

According to an embodiment of the present invention, the core support is characterized in that formed integrally with the cylindrical core holder.

According to an embodiment of the present invention, the dividing wall is characterized in that the insulating wall.

According to one embodiment of the present invention, the hollow inner wall of the core holder portion is coated with an insulating material.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a high voltage transformer applying a bobbin structure according to the present invention, FIG. 2 is a plan view of FIG. 1 showing a high voltage transformer, and FIG. 3 is a side view of FIG. 1 showing a high voltage transformer.

Referring to these drawings, the high voltage transformer according to the present invention includes a transformer bobbin 100 and an opposing magnetic core 200 that is a magnet installed in the bobbin.

The transformer bobbin 100 has a cylindrical core holder portion having a core insertion hollow 110a and coil winding portions 100A, 100B around the core holder portion.

The coil winding includes a primary coil winding 100A of low pressure and a secondary coil winding 100B of high pressure.

The primary coil winding part 100A consists of a first division section 120a by two division walls 110, and the secondary coil winding part 100B is divided into a plurality of divisions by a plurality of division walls 110 at regular intervals. Section 120b, a plurality of slits 130 are formed between the divided section of the secondary coil winding.

The dividing wall 110 is formed of an insulating wall to maintain an insulating state between the primary and secondary coil windings and the division section 120b of the secondary winding, thereby preventing short circuits and dielectric breakdown between the winding coils. do.

In this case, the thickness d1 of the dividing wall 110 is a thickness sufficient to prevent a short circuit and insulation breakdown between the winding coils, which determines the capacity of the transformer in advance, and thus the input / output voltage, the size and permeability of the core. After designing conditions such as the thickness of the coil and the number of windings in accordance with the capacity, prior to designing the limit of the dielectric breakdown according to the condition, it can be appropriately adjusted. Therefore, since the size of the thickness is determined in conjunction with the conditions of the above-mentioned design step, it should be noted that the numerical limitation is different for each condition.

Both ends of the core holder are integrally or separately attached to the core support 150 which protrudes from the both ends at a predetermined width d2 and a depth d3.

The width d2 of the upper surface 150a of the core support 150 is approximately equal to the width dE of the core 200 in which the core installed in the core holder portion is exposed and supported to the outside.

This allows the magnetic core to be supported and maintained in a compact arrangement outside the bobbin when the opposing magnetic core 200 is mounted on the bobbin 100, thereby keeping the size of the entire transformer compact and supporting and maintaining the core. Since it can implement | achieve with a simple structure, there exists an effect which especially enlarges the magnitude | size of the part of the high voltage | voltage winding part and core which participate in an electromagnetic induction action.

In addition, the core support 150 having a depth d3 extending from the bottom to the bottom of the hollow 110a of the core holder part has an electromagnetic influence of the coil and the core wound around the coil winding part such as a PCB substrate. Create a gap that does not reach the periphery. This is to prevent the influence of unexpected heat generation inside the transformer to the circuit board on which the transformer is mounted. At this time, the separation distance, that is, the depth (d3) should be prepared for a heat much larger than the heat generated at the rated output of the transformer, so that the thickness is at least twice the thickness of the cumulative coil wound around the coil windings. desirable.

According to an embodiment of the present invention, the opposing magnetic core 200 is configured to face the E-type magnetic core composed of the center core 200a and the outer cores 200b and 200c. In the arrangement, the center cores 200a are disposed to face each other so as to fit in the hollow 110a of the core holder portion, and the outer cores 200b and 200c are installed on the outer wall of the dividing wall 110 around the outer circumference of the core holder portion. do.

The inner wall of the cylindrical portion of the hollow 110a of the core holder portion into which the central core 200a is inserted is coated with an insulating material, thereby maintaining an insulated state between the core and the coil.

Meanwhile, recesses 110b and 110c having a width corresponding to the width (dB) of the outer core are formed on the outer wall of the dividing wall 110 to allow the external magnetic cores 200b and 200c to be mounted thereon.

By the recesses 110b and 110c, the magnetic core 200 may maintain a seating state when installed in the bobbin 100, and the magnetic core may be fixed without flow by fastening by taping or the like after mounting. Since it prevents the displacement of the magnetic path, it stably induces the electromagnetic induction action to bring about the stability of the electromagnetic and performance of the entire transformer.

The above embodiment has been described with respect to the E-type opposing core, but the present invention is not limited thereto.

For example, the center core can be separately installed in the hollow of the core holder portion, and a U-shaped or loop-shaped outer core supporting both ends of the center core can be inserted into and attached to the recess of the partition wall outer wall as described above. Of course, the external core as described above may be mounted using a separate fastening mechanism such as taping or clamping without recesses on the outer wall of the dividing wall.

According to the above-described configuration, the present invention prevents breakdown between the high voltage coil winding and the low voltage coil winding and within the high voltage coil winding, and realizes the core mounting structure, thereby stably maintaining the electromagnetic characteristics of the transformer. In addition, the present invention provides a high voltage transformer employing a bobbin structure capable of increasing the efficiency of the high voltage transformer by doubling the relative cross-sectional area of the core and the high voltage winding unit.

Claims (6)

As a high voltage transformer, Internal and external facing magnetic cores; A core-shaped hollow core holder portion having a core inserted at both ends and holding and supporting the opposing magnetic core, and a plurality of primary coil winding portions of a predetermined interval by a partition wall formed around the core holder portion and a plurality of predetermined intervals. A bobbin provided with a coil winding portion formed of secondary coil winding portions of a plurality of divided sections by the dividing wall; The core support is formed so as to protrude and extend from the both ends of the coil winding to a predetermined width and depth, the extension width is the same as the width of the core in which the core installed in the core holder portion exposed to the outside. The high voltage transformer according to claim 1, wherein a depth of the coil support is formed to form a separation interval such that electromagnetic effects of the coil and the core wound around the winding portion do not reach the periphery. According to claim 1, wherein the outer magnetic core is installed on the outer wall of the dividing wall around the outer periphery of the core holder portion, the outer wall is formed with a recess having a width corresponding to the width of the outer core so that the outer magnetic core is mounted High voltage transformer. The high voltage transformer according to claim 1, wherein the core support is integrally formed with the cylindrical core holder. The high voltage transformer according to claim 1, wherein the dividing wall is formed of an insulating wall. The high voltage transformer according to claim 1, wherein the hollow inner wall of the core holder part is coated with an insulating material.

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