KR20100047770A - Structure a bobbin of transformer - Google Patents

Structure a bobbin of transformer Download PDF

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Publication number
KR20100047770A
KR20100047770A KR1020080106803A KR20080106803A KR20100047770A KR 20100047770 A KR20100047770 A KR 20100047770A KR 1020080106803 A KR1020080106803 A KR 1020080106803A KR 20080106803 A KR20080106803 A KR 20080106803A KR 20100047770 A KR20100047770 A KR 20100047770A
Authority
KR
South Korea
Prior art keywords
bobbin
ferrite core
coil
transformer
present
Prior art date
Application number
KR1020080106803A
Other languages
Korean (ko)
Inventor
김세준
Original Assignee
주식회사 대우일렉트로닉스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020080106803A priority Critical patent/KR20100047770A/en
Publication of KR20100047770A publication Critical patent/KR20100047770A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • H01F1/0315—Ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers

Abstract

The present invention relates to a bobbin structure of a transformer, characterized in that guide protrusions are formed on both inner side surfaces of the through hole of the ferrite core so as to maintain a constant distance between the ferrite core and the coil wound around the bobbin body. . Therefore, the present invention, by forming a guide projection located between the ferrite core and the bobbin body, it is possible to secure a clearance distance between the ferrite core and the start coil and the end coil, so that the transformer can withstand the withstand voltage and is stable. The power supply is made, and the reliability of the component can be increased, and furthermore, the leakage current generated between the ferrite core and the terminal pin can be prevented.

Description

STRUCTURE A BOBBIN OF TRANSFORMER

The present invention relates to a bobbin structure of a transformer, and more particularly, to maintain a constant distance between the ferrite core and the coil to prevent the occurrence of sparks and electromagnetic waves due to current leakage between the ferrite core and the terminal pin. It relates to the bobbin structure of the transformer.

In general, a transformer is a combination of two or more coils in a common gyro, and when alternating current or pulsation flows through one side of the primary coil, a change in the magnetic lines causes a current change in the secondary coil. It is an element to make.

The transformer is attached to an electronic circuit board in an electronic product such as a PDP or a TFT-LCD TV, and serves to provide a high voltage in an electronic circuit by receiving a low voltage or to convert a low voltage by receiving a high voltage. It is manufactured by winding the outer circumferential surface of a bobbin made of a heat-resistant and insulating resin with a coil, surrounding the coil with an insulating film, and inserting and fixing a ferrite core into the coil wound bobbin.

Such a conventional transformer 100 is largely composed of a bobbin 110 and a ferrite core 120 as shown in FIG.

The bobbin 110 is formed in the center of the through-hole (not shown) in the center and at the outer periphery of the cylindrical bobbin body 113 and the lower side of the bobbin body 113 wound around the coil 130 is formed on the outer peripheral surface A base 115 is formed with a plurality of coil insertion grooves 116 formed therein.

Subsequently, fixing portions 117 are formed at both ends of the base 115 of the bobbin 110 to insert and fix the ferrite core 120 to be described later.

In addition, a terminal pin 140 connected to the coil 130 wound around the bottom of the base 115 is installed.

In addition, the insulating tape 150 is wound between the coil 130 and the coil 130 wound on the bobbin body 113 to satisfy a predetermined national and international standard.

The ferrite core 120 is coupled to the outer periphery of the bobbin 110 serves as a magnetic circuit.

The conventional transformer 100 configured as described above winds the coil 130 on the outer circumference of the bobbin body 113 of the bobbin 110. That is, the coil 130 is wound around the bobbin main body 113 in a state in which the start coil 130a of the coil 130 is fixed to the start terminal pin 140a of the terminal pin 140. Then, the coil 130 starts to be wound from a portion in contact with the surface of the base 115, and reciprocates the bobbin body 113 to stack the coil 130. Then, the end coil 130b of the coil 130 wound on the bobbin body 113 is fixed to the end terminal pin 140b of the terminal pin 140.

At this time, the insulating tape 150 is wound between the coil 130 and the coil 130.

When the coil 130 wound on the bobbin 110 is fixed to the terminal pin 140, the ferrite core 120 is positioned in the fixing part 117 and the through hole of the bobbin 110, and then wound and fixed with a tape. The assembly of the transformer 100 is completed.

However, in the conventional transformer 100 configured as described above, the insulation distance between the coil 130 and the ferrite core 120 is limited to at least 3 mm, but the coil 130 is wound around the coil 130 to the terminal pin 140. In the process of installing 130, there are many cases where the clearance distance between the ferrite core 120 and the coil 130 becomes less than 3 mm, resulting in the transformer 100 being unable to withstand the withstand voltage, as well as the ferrite core. The leakage of current occurs between the 120 and the terminal pins 140, and sparks due to current leakage may damage the transformer 100 or the electronic circuit, or cause the electronic circuit to malfunction due to the generation of electromagnetic waves. There was this.

Therefore, the present invention has been made to solve the above-described drawbacks, by forming a guide protrusion between the ferrite core and the bobbin body to maintain the clearance distance between the ferrite core and the coil wound around the bobbin body, The distance between the coils can be kept constant, thereby providing a transformer bobbin structure that can prevent the generation of sparks and electromagnetic waves caused by current leakage between the ferrite core and the terminal pins.

In order to achieve the above object, the present invention, the bobbin body is formed in parallel to the bobbin body and the lower side of the bobbin wound around the coil and the outer circumferential surface of the bobbin made of a plurality of coil insertion grooves and the bobbin body included therein In the transformer consisting of a ferrite core installed in the base to serve as a magnetic circuit, and a plurality of terminal pins protruding from the bottom of the base, the ferrite core and the coil wound around the bobbin body on both inner sides of the through hole of the ferrite core. Provides a bobbin structure of the transformer in which the guide protrusion is formed to maintain the separation distance constant.

Preferably, the guide protrusion may be integrally formed on one or both inner surfaces of both sides of the through hole of the ferrite core, and a plurality of guide protrusions may be formed on the upper surface of the base to protrude between the ferrite core and the bobbin body. It is characterized in that located in.

According to the bobbin structure of the transformer of the present invention as described in detail above, by forming a guide projection located between the ferrite core and the bobbin body, it is possible to secure a clearance distance between the ferrite core and the start coil and the end coil safely The transformer is not only able to withstand the withstand voltage, but also provides a stable power supply, increases the reliability of the component, and further prevents leakage of current generated between the ferrite core and the terminal pin.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be made based on the contents throughout the specification.

2 is a front view of the bobbin structure of a transformer according to an embodiment of the present invention, Figure 3 is a front view of the bobbin structure of a transformer according to another embodiment of the present invention.

As shown in FIG. 2, the bobbin structure of the transformer of the present invention includes a bobbin 20 and a ferrite core 30.

Here, the bobbin 20 has a cylindrical bobbin body 23 in which a through hole (not shown) is formed in the center and a coil 40 is wound around the outer circumference thereof, and is formed parallel to both lower sides of the bobbin body 23. The outer circumferential surface is composed of a base 25 having a plurality of coil insertion grooves 26 formed therein.

Then, at both ends of the base 25 of the bobbin 20, a fixing portion 27 capable of inserting and fixing the ferrite core 30 to be described later is formed.

In addition, a terminal pin 50 connected to the coil 40 wound around the bottom of the base 25 is installed.

In addition, the insulating tape 60 is wound between the coil 40 and the coil 40 wound on the bobbin body 23 to satisfy a predetermined national and international standard.

Both ends of the ferrite core 30 opened in a “??” shape having an opening at the lower side thereof are fixed to the fixing part 27. Therefore, the through-hole 31 is formed so that the bobbin main body 23 is positioned at the center of the ferrite core 30 to serve as a magnetic circuit.

On the other hand, in accordance with a feature of the present invention to maintain a constant distance between the ferrite core 30 and the coil 40 wound on the bobbin body 23, the current between the ferrite core 30 and the terminal pin 50 Guide protrusions 70 protrude from both inner side surfaces of the through-hole 31 of the ferrite core 30 so as to prevent spark generation and electromagnetic wave generation due to leakage.

As illustrated in FIG. 2, one or more guide protrusions 70 may be integrally formed on both inner surfaces of the through-hole 31 of the ferrite core 30, or a plurality of guide protrusions 70 may be formed along the inner surfaces of the ferrite core 30. As an example, the guide protrusion 70 protrudes from the upper surface of the base 25 and is positioned between the ferrite core 30 and the bobbin body 23.

The diameter of the guide protrusion 70 is preferably 3 to 5 mm or more.

Hereinafter, the operation state of the bobbin structure of the transformer configured as described above is as follows.

The coil 40 is wound around the outer periphery of the bobbin body 23 of the bobbin 20. That is, the coil 40 is wound around the bobbin body 23 in a state in which the start coil 40a of the coil 40 is fixed to the start terminal pin 50a of the terminal pin 50. Then, the coil 40 starts to be wound from a portion in contact with the surface of the base 25, and reciprocates the bobbin body 23 so that the coils 40 are stacked. Subsequently, the end coil 40b of the coil 40 wound on the bobbin main body 23 is fixed to the end terminal pin 50b of the terminal pin 50.

At this time, the insulating tape 60 is wound between the coil 40 and the coil 40.

When the coil 40 wound on the bobbin body 23 is fixed to the terminal pin 50, the both ends of the ferrite core 30 are inserted into the fixing portion 27 of the base 25 to assemble the transformer 10. This is done.

Therefore, in the present invention, when the ferrite core 30 is coupled to the bobbin 20, the start coil 40a of the coil 40 wound around the ferrite core 30 and the bobbin body 23 by the guide protrusion 70. And the clearance distance with the end coil 40b can be secured so that the transformer 10 can withstand the withstand voltage sufficiently, and can prevent leakage of current generated between the ferrite core 30 and the terminal pin 50. have.

What has been described above is just one embodiment for implementing the bobbin structure of the transformer according to the present invention, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims, the gist of the present invention Without departing from the technical spirit of the present invention to the extent that any person of ordinary skill in the art to which the present invention pertains various modifications can be made.

1 is a perspective view showing a bobbin structure of a conventional transformer,

2 is a front view of a bobbin structure of a transformer according to an embodiment of the present invention,

3 is a front view of a bobbin structure of a transformer according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

20: bobbin 23: bobbin body

25: base 26: coil insertion groove

27: fixed part 30: ferrite core

31: through hole 40: coil

50: terminal pin 60: insulating tape

70: guide protrusion

Claims (3)

The bobbin main body is wound around the bobbin body and the bobbin main body is formed in parallel to the lower both sides of the bobbin body and a plurality of coil insertion grooves formed on the outer peripheral surface and the bobbin main body is installed on the base to include the inside of the magnetic circuit In the transformer consisting of a ferrite core and a plurality of terminal pins protruding from the bottom of the base, A bobbin structure of a transformer having guide protrusions protruding from both inner side surfaces of through-holes of the ferrite core so as to maintain a constant distance between the ferrite core and the coil wound around the bobbin body. The method of claim 1, The guide protrusion is, The bobbin structure of the transformer is formed integrally on both inner surfaces of the through-holes of the ferrite core along one or both inner surfaces. The method of claim 1, The guide protrusion is, A bobbin structure of a transformer protruding from the upper surface of the base and positioned between the ferrite core and the bobbin body.
KR1020080106803A 2008-10-29 2008-10-29 Structure a bobbin of transformer KR20100047770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080106803A KR20100047770A (en) 2008-10-29 2008-10-29 Structure a bobbin of transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080106803A KR20100047770A (en) 2008-10-29 2008-10-29 Structure a bobbin of transformer

Publications (1)

Publication Number Publication Date
KR20100047770A true KR20100047770A (en) 2010-05-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020080106803A KR20100047770A (en) 2008-10-29 2008-10-29 Structure a bobbin of transformer

Country Status (1)

Country Link
KR (1) KR20100047770A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103247422A (en) * 2013-05-30 2013-08-14 江苏泰昌电子有限公司 Switching power supply transformer for external power supply of display
KR101405407B1 (en) * 2013-01-04 2014-06-11 크로바하이텍(주) Safety standard distance keeping the bobbin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101405407B1 (en) * 2013-01-04 2014-06-11 크로바하이텍(주) Safety standard distance keeping the bobbin
CN103247422A (en) * 2013-05-30 2013-08-14 江苏泰昌电子有限公司 Switching power supply transformer for external power supply of display

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