KR101891176B1 - High-voltage transformer for x-ray generation apparatus and method of manufacturing the same - Google Patents

Abstract

The present invention relates to a high-voltage transformer for boosting of a high-voltage tank, which is a key component of an X-ray generation apparatus, and a manufacturing method thereof. In order to improve efficiency of an X-ray generation apparatus, the transformer is manufactured using a core in which a plurality of materials having different permeabilities are laminated. According to the present invention, the manufacturing method comprises the steps of: measuring a resonance frequency of the high-voltage transformer including the core composed of a first member having a predetermined permeability and first and second winding units magnetically connected through the core; determining a control frequency band of the high-voltage transformer; and manufacturing the high-voltage transformer in which the resonance frequency is shifted to the control frequency band by inserting at least one second member into the core composed of the first member.

Description

TECHNICAL FIELD [0001] The present invention relates to a high-voltage transformer for a x-ray generator and a method of manufacturing the same. BACKGROUND OF THE INVENTION [0002]

The present invention relates to a high-voltage transformer for boosting a high-pressure tank, which is a core component of an x-ray generator, and a method of manufacturing the same. In order to improve the efficiency of the x- .

Recently, medical X-ray diagnosis (diagnosis) devices are increasing the switching frequency to improve the quality of X-ray dose. However, when the switching frequency is increased in the conventional device having the same capacity, the conventional output can not be maintained and the maximum output is lowered. Therefore, it has been difficult to reproduce a high-voltage transformer corresponding to the switching frequency in order to improve it.

In addition, the high voltage transformer for the booster of the high pressure tank constituting the existing medical X - ray generator was manufactured through experience and repeated tests using one material having the representative permeability.

It took a lot of time and money to produce a transformer with the maximum efficiency, and finding the maximum efficiency point of the X-ray generator was also very difficult.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a high-pressure transformer for an X-ray generator, Voltage transformer and a method of manufacturing the same.

It is another object of the present invention to provide a method of manufacturing a transformer having a desired maximum efficiency without adjusting the winding ratio or the winding ratio of a conventionally manufactured high-voltage transformer.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least solve the problems in the conventional art.

In order to accomplish the above object, the present invention provides a method of manufacturing a high-voltage transformer for an X-ray generator, comprising the steps of: forming a core composed of a first member having a predetermined permeability, a first winding portion magnetically connected through the core, Pressure transformer; determining a control frequency band of the high-voltage transformer; inserting at least one second member into the core constituted by the first member, And manufacturing a high-voltage transformer moved to the frequency band.

According to an aspect of the present invention, the control frequency band is determined to enhance the quality of the X-ray dose, and the high-voltage transformer including the core composed of the first member has a maximum output in a frequency band other than the control frequency band .

According to another aspect of the present invention, the core is divided into at least two or more core portions, the second member having a first permeability is attached to the first core portion, and the third member having the second permeability is attached to the second core portion. And attaching the first core portion and the second core portion to each other to manufacture a high-voltage transformer.

According to another aspect of the present invention, the control frequency band may be an integral multiple of the switching frequency band of the high voltage transformer.

In order to achieve the above object, the present invention provides a high-voltage transformer for an x-ray generator, comprising: a core composed of a first member having a high permeability; a first winding portion wound on one side of the core; And at least one second member having a magnetic permeability different from that of the first member is inserted into a part of the core so as to be inserted into the first coil part Pressure transformer for changing the permeability of the core such that the anti-resonance frequency band of the high-voltage transformer and the control frequency band of the x-ray generator coincide with each other.

According to one aspect of the present invention, the inserting portion is located in the first winding portion and the second winding portion, and the second member is configured to be laminated symmetrically on the core.

According to another aspect of the present invention, the insertion portion may be configured such that the core has a predetermined gap (GAP).

According to another aspect of the present invention, the control frequency band may be an integer multiple of the switching frequency of the high voltage transformer.

According to another aspect of the present invention, the second member may have a lower permeability than the first member.

According to another aspect of the present invention, the second member may be formed of at least one of acrylic, polypropylene (PP), polyoxymethylene (POM), and polyethylene (PE).

In addition to this, another method for implementing the present invention, another system, and a computer-readable recording medium for recording a computer program for executing the method may be further provided.

According to the high-voltage transformer for the X-ray generator and the method for fabricating the same according to the present invention, the frequency band having the maximum efficiency can be adjusted as intended by the manufacturer by producing a high-voltage transformer in which a plurality of materials having different permeabilities are laminated, It is possible to easily manufacture a high-voltage transformer having the maximum efficiency in the band.

Further, according to the high-voltage transformer for the X-ray generator and the method of manufacturing the same according to the present invention, it is possible to use the existing high-voltage transformer and to simplify the process, thereby reducing the development time and cost of the X-ray generator.

1 is a view showing an example of a high-voltage transformer for an X-ray generator according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a core,
3 is a flowchart showing a method of manufacturing a high-voltage transformer for an X-ray generator according to an embodiment of the present invention.
4A to 4C are graphs showing changes in the switching frequency band according to members inserted into the core.
5 is a conceptual diagram illustrating an X-ray generator according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware. On the other hand, 'to' is not limited to software or hardware, 'to' may be configured to be an addressable storage medium, and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

1 is a view showing an example of a high-voltage transformer for an X-ray generator according to an embodiment of the present invention.

1, a high-voltage transformer 100 for an X-ray generator includes a core 110 composed of a first member having a high permeability, a first winding portion 210 wound on one side of the core 110, At least one second winding portion 220 wound on the other side of the core 110 and magnetically connected to the first winding portion 210 and at least one second winding portion 220 wound on a portion of the core 110, And an insertion portion 120 into which at least one second member 130 is inserted.

Here, the inserting portion 120 may be located at the center of the first winding portion 210 and the second winding portion 220. Of course, the position of the insertion portion 120 shown in FIG. 1 is only an embodiment and may be located at one end of the first winding portion 210 and the second winding portion 220, The second member 130 may be inserted into the first member 130. [

The second member 130 may have a lower permeability than the first member. For example, the conventional high-voltage transformer 100 is a core 110 made of ferrite (e.g., ATC HXA high-voltage transformer), the second member 130 is made of acrylic, polypropylene (PP), polyoxymethylene PE). ≪ / RTI >

The at least one second member 130 may change the magnetic permeability of the core 110 so that the anti-resonance frequency band of the high-voltage transformer coincides with the control frequency band of the X-ray generator. Here, the control frequency refers to a n-fold (n = positive real number) band of the switching frequency that determines the quality of the X-ray dose. As the switching frequency becomes higher, in the case of the core 110 composed of the first member, It is possible to have maximum efficiency in other frequency bands.

 Therefore, at a high switching frequency, the core 110 composed of the first member having a high permeability can be reused as it is, and the resonance frequency band can be shifted to the control frequency band to maximize the efficiency.

A method of inserting a member having a different magnetic permeability into an existing core 110 will be described in detail with reference to FIG.

2 is a diagram illustrating an example in which a plurality of members 130 and 140 having various permeabilities are laminated to reconstruct a core 110 according to an embodiment of the present invention.

2, a core 110 composed of a first member is divided into at least two or more core portions 111 and 112, a second member 130 having a first permeability is provided in the first core portion 111, A third member 140 having a second permeability may be laminated on the second core portion 112, and then a core having a new resonance frequency band may be fabricated by combining the third member 140 and the second member.

The insertion portion 120 may be configured such that the core 110 has a predetermined gap GAP and the second member 130 and the third member 140 are symmetrically inserted into the insertion portion 120).

2, the members 130 and 140 having two different permeabilities are inserted in the middle of the core 110, but the present invention is not limited thereto. That is, it may be inserted into the inside of the core or attached to one side thereof.

Further, the present invention can be applied to a case where the core is composed of one first winding portion and a second winding portion as well as one first winding portion and a plurality of second winding portions, and in which the core is formed in parallel such as 2X2 and 3X3.

3 is a flowchart showing a method of manufacturing a high-voltage transformer for an X-ray generator according to an embodiment of the present invention.

Referring to Fig. 3, in step S301, the resonant frequency of the high-voltage transformer including the first winding portion and the second winding portion magnetically coupled through the core and the core constituted by the first member having a predetermined magnetic permeability can be measured . Here, the predetermined permeability may be a material having a higher permeability than generally known materials.

In step S320, the control frequency band of the high-voltage transformer can be determined to be higher than the existing one in order to increase the dose quality of the x-ray generator. At this time, the high-voltage transformer including the core composed of the existing first member may have the maximum efficiency in a frequency band other than the determined control frequency band.

In step S330, at least one second member may be inserted into the core constituted by the first member to manufacture a high-voltage transformer in which the antiresonant frequency is shifted to the control frequency band. For example, the core may be divided into at least two core portions, a second member having a first permeability may be attached to the first core portion, a third member having a second permeability may be attached to the second core portion, And combining the first core portion and the second core portion to manufacture a high-voltage transformer.

4A to 4C are graphs showing changes in the switching frequency band according to members inserted into the core.

4A is a graph showing the antiresonance frequency in any high-voltage transformer with a ratio of primary winding to secondary winding of 10: 250. On the other hand, if the minimum required minimum switching frequency (400) is required to be 62.5 kHz for increasing the quality of the dose, it is necessary to insert a first member having a permeability lower than that of the core in order to increase the efficiency of the high- have.

4B shows the resonance frequency of the high-voltage transformer in which the first member is inserted while the turns ratio is still maintained at 10: 250. For example, when 1 mm of acrylic is inserted, it can be seen that the resonance frequency band has moved to the 57.5 kHz position. However, since the minimum switching frequency (400) still can not be satisfied, it is necessary to further move the resonance frequency to increase the efficiency of the high-voltage transformer.

4c shows the resonant frequency of the high-voltage transformer in which the first member and the second member are inserted while the turns ratio is still maintained at 10: 250. For example, it can be seen that the resonance frequency band is shifted to the 67.5 kHz position by inserting 0.4 mm of PE into acrylic of 1 mm. Therefore, by adjusting the switching frequency to 67.5kHz, the high-voltage transformer can be adjusted to have high efficiency with high dose quality. In addition, the existing high pressure transformer can be used, and the process is relatively simple, thereby reducing the development time and cost of the X-ray generator.

Hereinafter, an X-ray generator 500 according to an embodiment of the present invention will be described with reference to FIG. Although only the components related to the present embodiment are shown in Fig. 5, the present invention is not limited thereto. 1 to 4 can be performed through the X-ray generator 500 shown in FIG. 5, even though omitted from the following description.

5, the x-ray generator 500 may include a rectifier circuit 510, a high voltage generator 520, a high voltage control circuit 530, an x-ray tube 540 and a filament drive circuit 550 .

The rectifier circuit 510 may generally rectify the AC input to create the DC link needed for the high voltage generator 520. [

The X-ray generator 500 applies a high voltage to the anode and the cathode of the X-ray tube 540 through the high voltage generator 520 and supplies a current to the cathode filament of the X-ray tube 540 through the filament driving circuit 550 X-rays can be generated.

The high voltage generating device 520 may include an inverter 521, a high voltage transformer 522, and a back pressure circuit 523.

First, the voltage charged in the DC link capacitor after passing through the rectifying circuit 510 is changed to AC through the inverter 521. [ In this case, since the input power source is DC, the output voltage of the inverter 521 itself becomes a square wave.

The high voltage transformer 522 is operated in accordance with the set switching frequency to apply the boosted output voltage to the back pressure circuit 523. The back pressure circuit 523 is composed of a plurality of diodes and capacitors and may be arranged in parallel at the high voltage transformer output stage. Accordingly, the output of the applied high-voltage transformer is converted to the boosting and DC voltage in stages, and the output voltage can be generated by operating the double-voltage, the 8-times voltage, or the like, and applied to the X-ray tube 540.

The high-voltage transformer 522 has anti-resonance characteristics, and the back-pressure circuit 523 is also arranged in parallel with the capacitor components, so that the back-pressure circuit 523 has anti-resonance properties. Therefore, when the resonance frequency is matched with the switching frequency of the high-voltage transformer 522, the high-voltage generator 520 having a good output efficiency can be designed.

The high-voltage transformer for a x-ray generator and the method of manufacturing the same as described above are characterized in that a material having a different magnetic permeability is inserted in the middle of the existing core to vary the total magnetic permeability and move the antiresonant frequency band generated thereby to the control frequency band, The maximum efficiency can be obtained. For example, if the magnetic permeability of the core is adjusted, the overall magnetic flux is changed even in the same circuit current, thereby changing the inductance. The change in inductance leads to a change in the resonance frequency, so that it is possible to minimize the reactive power at the switching frequency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. There will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

110: core composed of first member
120:
130: second member
140: third member
210: first winding section
220: 2nd winding section

Claims (11)

A method of manufacturing a high-voltage transformer for an X-ray generator,
Measuring a resonant frequency of a high voltage transformer including a core composed of a first member having a first permeability, a first winding portion magnetically connected through the core, and a second winding portion;
Determining a control frequency band of the high-voltage transformer to have a magnitude n of the measured resonance frequency (n is a positive real number greater than 1) times; And
And inserting a second member having a second permeability different from the first permeability into a core composed of the first member to manufacture the high-voltage transformer in which the resonance frequency is shifted to the control frequency band. The method according to claim 1,
Wherein the control frequency band is determined to enhance the quality of the X-ray dose, and the high-voltage transformer including the core composed of the first member has a maximum output in a frequency band other than the control frequency band. . The method according to claim 1,
Attaching a second member having a first permeability to the first core portion and attaching a third member having a second permeability to the second core portion by dividing the core into at least two or more core portions, Further comprising the step of assembling the first core portion and the second core portion to fabricate a high-voltage transformer. The method according to claim 1,
Wherein the control frequency band is an integral multiple of the switching frequency band of the high-voltage transformer. In a high-voltage transformer for an X-ray generator,
A core composed of a first member having a first permeability;
A first winding portion wound on one side of the core;
At least one second winding portion wound on the other side of the core and magnetically connected to the first winding portion; And
And a second member having a second permeability different from the first permeability is inserted into a portion of the core,
Wherein the second member changes the magnetic permeability of the core such that the anti-resonance frequency band of the high-voltage transformer coincides with the control frequency band of the X-ray generator. The method of claim 5,
Wherein the inserting portion is located in the first winding portion and the second winding portion, and the second member is configured to be laminated symmetrically on the core. The method of claim 5,
Wherein the inserting portion is configured such that the core has a predetermined gap (GAP). The method of claim 5,
Wherein the control frequency band is an integral multiple of the switching frequency of the high-voltage transformer. The method of claim 5,
Wherein the second member has a lower permeability than the first member. The method of claim 5,
Wherein the second member is made of at least one of acrylic, polypropylene (PP), polyoxymethylene (POM), and polyethylene (PE). A high voltage generating device including the high voltage transformer of claim 5;
A high voltage control circuit for controlling the high voltage generating device; And
An x-ray generator comprising an x-ray tube for generating an x-ray.

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