WO2006054452A1 - 高圧トランス - Google Patents
高圧トランス Download PDFInfo
- Publication number
- WO2006054452A1 WO2006054452A1 PCT/JP2005/020362 JP2005020362W WO2006054452A1 WO 2006054452 A1 WO2006054452 A1 WO 2006054452A1 JP 2005020362 W JP2005020362 W JP 2005020362W WO 2006054452 A1 WO2006054452 A1 WO 2006054452A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- primary winding
- bobbin
- winding
- core
- voltage transformer
- Prior art date
Links
Classifications
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/326—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures specifically adapted for discharge lamp ballasts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/42—Flyback transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/08—High-leakage transformers or inductances
- H01F38/10—Ballasts, e.g. for discharge lamps
Definitions
- the present invention relates to a high-voltage transformer, particularly a high-voltage transformer for lighting a discharge tube that requires a high voltage, such as a liquid crystal display device.
- a discharge lamp such as a cold cathode lamp or a metal nitride lamp has been used as a light source for a backlight device of a liquid crystal display device, a facsimile machine, a copying machine or the like.
- a high voltage is required.
- the output of the oscillation circuit is boosted to several kV using a high voltage transformer, and the lamp is lighted.
- a core made of ferrite is inserted into a hollow hole of a bobbin in which a core portion is divided into a plurality of sections in the same axis in the axial direction by a flange. Then, the primary winding and the secondary winding are wound using a linear conductive member.
- Patent Document 2 a high-voltage transformer for lighting a discharge lamp is proposed in which a primary conductor is formed using a thin plate conductor, a large current capacity can flow, and the transformer can be miniaturized. Has been.
- the high-voltage transformer has, for example, a U-shaped core 100 and a rod-shaped core 100a combined to form a closed magnetic circuit, and primary windings 101 and 101a are formed in a U shape with thin plate conductors. Then, the primary winding 101 is inserted into the insertion holes 105a and 105b formed in the flange 104 of the bobbin 103, and the primary winding 101a is inserted into the insertion holes 105c and 105d formed in the flange 104a of the bobbin 103.
- each of the secondary windings 102 and 102a is arranged in a single layer and stacked in two stages to increase the electric capacity of the secondary winding, improve the insulation between adjacent wires, and improve the wiring. Electricity between The short circuit due to the potential difference between adjacent lines is reduced by reducing the potential difference.
- miniaturization of the high-voltage transformer has been achieved by making the magnetic circuit a closed magnetic circuit.
- Patent Document 1 JP-A-8-153634
- Patent Document 1 Japanese Patent Laid-Open No. 10-241972
- the high-voltage transformer of Patent Document 2 has a structure in which the primary winding and the secondary winding are arranged side by side in the force axis direction that allows a large current capacity to flow through the primary winding.
- the performance as a transformer decreases. There is a problem.
- the present invention aims to reduce the size of the transformer, improve the workability during manufacturing, and increase the coupling between the primary and secondary windings.
- the purpose is to provide a high-voltage transformer.
- a primary winding and a secondary winding are wound around a core portion of a bobbin, and a core made of a magnetic body is inserted into the hollow hole of the bobbin.
- the bobbin has a terminal portion having a plurality of terminals at both ends of the core portion, and a thin plate-like conductor that forms a primary winding in the core portion is integrally formed.
- a secondary winding is formed on the outer periphery of the core portion including the primary winding described above.
- the primary winding is concentrically disposed on the inner periphery of the secondary winding on the low voltage side.
- the width between the sections in the section where the primary winding is not arranged is divided into a plurality of sections, and the width between the sections where the primary winding is not arranged is larger than the width between the sections where the primary winding is not arranged.
- the diameter of the core part in the section where the primary winding is disposed and the diameter of the core portion in the section where the primary winding is disposed is such that the primary winding is disposed. It is characterized by having a larger diameter than the diameter of the core part in the section.
- the primary winding consists of one or two turns.
- a boss for positioning on the printed circuit board is provided on the bottom surface of the terminal portion.
- Another embodiment is characterized in that the secondary winding on the high voltage side is obliquely wound.
- the high-voltage transformer of the present invention has a structure in which the primary winding becomes a conductor force on a thin plate, and the primary winding is embedded in the core portion of the bobbin by integral molding by an insert mold. This eliminates the work of winding the wire around the bobbin, thereby maintaining dimensional accuracy and improving productivity.
- the outer diameter of the winding portion of the secondary winding is maintained at the same level as that of the conventional high-voltage transformer, and the primary winding is embedded in the core portion, thereby reducing the size and improving the coupling. Can be configured.
- the primary winding is disposed concentrically and concentrically with the low voltage portion of the secondary winding so that the voltage difference between the primary winding and the secondary winding is reduced and the reliability of the transformer is improved. improves.
- FIG. 1 is a plan view showing a bobbin shape showing a state in which a secondary winding of a high-voltage transformer according to the present invention is wound.
- FIG. 2 is a cross-sectional view showing a cross-sectional structure of the core portion of FIG.
- FIG. 3 is a perspective view showing the shape of a bobbin according to the present invention.
- FIG. 4 is a configuration diagram showing a combination of a bobbin and a core according to the present invention and viewed from the bottom surface side of the bobbin.
- FIG. 5 is a perspective view showing the shape of a primary winding used in the present invention.
- FIG. 6a is a schematic configuration diagram showing a state where the bobbin of the present invention and the primary winding are integrally formed
- FIG. 6b is a cross-sectional view taken along the line AA.
- FIG. 7 is a cross-sectional view showing the shape of another primary winding according to the present invention.
- FIG. 8a shows a core connected to one bobbin, and FIG. It is the schematic which shows what connected the key.
- FIG. 9a shows a cross-sectional structure of the core part of the bobbin
- FIG. 9b is a cross-sectional view showing a cross-sectional structure of the core part according to another embodiment.
- FIG. 10 is an exploded perspective view of a conventional high-voltage transformer.
- FIG. 1 is a plan view of a high-voltage transformer according to the present invention
- FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1
- FIG. 3 is a perspective view of a bobbin
- FIG. 4 is a combination of a core and a bobbin. It is a bottom view of the high voltage transformer showing the previous state.
- bobbin 1 is formed of a resin such as liquid crystal polymer (LCP), and therefore, primary winding 8 is insert-molded in core portion 3.
- LCP liquid crystal polymer
- the outer peripheral part of this is divided into a plurality of sections a to h, and the secondary winding 6 is wound there.
- Terminal portions 2a and 2b provided at both ends of the bobbin 1 are provided with terminals 5a to 5k, respectively, and a core portion 3 is connected between the terminal portions 2a and 2b to form an integrated structure. ing.
- a core portion 3 is connected between the terminal portions 2a and 2b to form an integrated structure.
- two thin plate-like conductors 8a and 8b are embedded in the core portion by insert molding.
- the thin plate-like conductors 8a and 8b constitute the primary winding 8, and are composed of one turn or two turns.
- the primary winding 8 is arranged on the left side of the figure, that is, on the low voltage side of the secondary winding 6.
- the core part 3 is provided with flanges 4a to 4g to form a plurality of sections a to h.
- It is divided into sections.
- the section widths in the 2 sections of the b section and the c section are the same, and are larger than the section widths in the d section to the h section, and the section widths in the 5 sections from the d section to the h section are each formed to be the same. .
- the outer diameter of the core part in the 3 sections from the a section to the c section is formed larger than the outer diameter of the core part 3b in the 5 sections from the d section to the h section, and has a low secondary winding.
- the groove depth of the high voltage side section is shallower than the voltage side section.
- the secondary windings 6a to 6g are wound into 7 sections from b section to h section, respectively, so that the voltages in each section are approximately equal.
- the terminals 5a, 5b, 5f, and 5g are terminals for primary winding
- the terminals 5h, 5i, 5j, and 5k are terminals for secondary winding
- the terminal 5c is It is a terminal for GND.
- a winding is wound around the a section.
- a tertiary winding such as a feedback coil may be wound around the a section.
- the tertiary winding is drawn out to terminals 5d and 5e.
- the bobbin 1 in which the primary windings 8a and 8b are insert-molded in the core part 3 has the outer shape shown in Fig. 3, has a through hole 12 in the center, and both ends.
- the terminal portion 2a, 2b formed in the portion has a surface 13 that is raised one step on the one side to facilitate the insertion of the core 11.
- the bobbin 1 is provided with seven flanges according to the outer diameter of the bobbin, and these flanges are each formed with one slit groove 7 on the upper surface or the lower surface, and the secondary winding It is possible to divide.
- This bobbin 1 is wound with the central leg 11a of the core 11 as shown in Fig. 4 after the secondary windings 6a to 6g are wound corresponding to the plurality of sections of the core part 3.
- the core 11 and the bobbin 1 are assembled so as to be inserted into the through hole 12 of the core 3.
- the core 11 is made of ferrite.
- the force of inserting the central leg portion 11a of the E-type core 11 into the through hole 12 of the bobbin 1 is not limited to the E-type core.
- EI core, U core, etc. are of course acceptable.
- two U-shaped cores are inserted from both ends of one or two bobbins, the ends of both cores are brought into contact with each other, and an adhesive is interposed between them.
- the core 11 is attached to the bobbin 1 by connecting.
- the bobbin 1 is assembled and fixed to a printed circuit board (not shown) such as a knocklight inverter circuit in a state where the core 11 is assembled, and the terminal of the bobbin 1 is soldered to the circuit board.
- a printed circuit board not shown
- a boss 9 is formed on the bottom surface of the terminal portion, and this boss 9 is provided on the printed circuit board (not shown).
- Bobbin 1 can be easily attached to the correct position on the printed circuit board by inserting it into the hole.
- Reference numerals 10a to 10e denote grooves for drawing out lead wires of the stranded wire.
- the primary winding 8 embedded in the core 3 is a force formed by a conductive thin plate.
- a 2 turn coil consisting of 8b is shown in FIG. 2 .
- a primary winding 8 made of a thin plate-like conductor used in the present invention is shown.
- This primary winding 8 is subjected to a punching process and a bending process in order by a multistage progressive press, and for each frame along the lead frame 15, two primary windings 8a, 8b, Terminal portions 5a to 5k connected to the lead wire 16 extending in the direction and the lead frame 15 formed on both edges are formed.
- These primary windings 8a and 8b are formed by connecting a coil portion and terminals 5b and 5f and 5a and 5g, respectively. Then, primary windings 8 a and 8 b formed by two U-shaped or U-shaped thin plates are insert-molded in the core portion 3. When using the primary wire 8 as a 1-turn coil, it is sufficient to use either the wire 8a or 8b coil. When using it as a 2-turn coil, for example, a printed circuit board (not shown) The terminal 5b and the terminal 5g may be connected to the wiring pattern formed in the above so that the wire 8a and the wire 8b are in series.
- two coils 8a and 8b are used as primary windings, and when only one turn coil is used, the two coils are connected in parallel.
- a common bobbin can be used for either one or two turns by connecting two coils in series.
- the primary winding 8 is positioned in the mold by the lead frame 15 and is insert-molded.
- the bobbin 1 that is still connected to the lead frame 15 is formed. And the connection part of the terminal parts 5a-5k and the lead frame 15 is cut
- the primary winding 8 that is insert-molded into the bobbin 1 is formed on the lead frame 15, and as is apparent from the cross-sectional view of FIG. It has two U-shapes with different heights at the same height.
- Each primary winding 8a, 8b has an L-shaped lead wire 16 bent outward from both ends thereof.
- two terminals 5f and 5g for primary winding and other terminals 5a to 5e following lead wire 16 where one end side force of primary winding 8 is extended are terminals for primary winding, GND terminal and tertiary winding.
- four secondary winding terminals 5h, 5i, 5j, and 5k are formed on the terminal portion 2b on the other end side of the bobbin 1.
- the primary winding wire, the lead wire, and the terminal have been described as being integrally formed by press molding.
- the shape of the conductor is U-shaped.
- the shape may be any shape such as a shape, a U-shape or a quadrangle.
- the terminal portion on the side of the terminal portion and the primary winding wire may be separated from each other even if the primary winding terminal protrudes from the side surface of the bobbin.
- Fig. 7 shows the cross-sectional shape of the primary winding.
- a plurality of flanges are provided on the outer periphery of the core portion of the bobbin in order to wind the secondary winding into a plurality of sections.
- a bobbin without these flanges.
- the secondary winding can also be wound by winding the lines diagonally and winding them one after the other with the forward and double winding directions reversed. This enables more multi-piece molding of the bobbin body, And the cost of the winding process of a secondary winding can be reduced.
- the section width of the secondary winding 6 in the section is wider than the section width on the high voltage side. This is to increase the coupling of the high-voltage transformer and to make the secondary winding 6 the same overall height on the low voltage side and the high voltage side so that the outer shape of the low voltage side does not become unnecessarily thick.
- the secondary winding on the high voltage side increases the radial width of the winding, while the secondary winding on the low voltage side decreases the radial width of the winding to reduce the secondary winding.
- the line height is the same as a whole, and the voltage in each section is equal.
- the high-voltage transformer of the present invention has a structure in which the primary winding 8 is a conductor force on a thin plate, and the primary winding is embedded in the core portion 3 of the bobbin by integral molding with an insert mold. Therefore, the work process of winding the primary winding 8 can be eliminated, the work efficiency can be increased, and the bobbin productivity can be improved.
- the secondary winding wound around the core portion of the bobbin forms a primary winding in the core portion with the heights of the low-voltage side and high-voltage side winding wires being substantially the same. Therefore, it is possible to make a high-voltage transformer that is compact and has high coupling properties.
- the positioning of the primary winding 8 is determined by the mold accuracy, the positional accuracy of the primary winding 8 in the bobbin can be maintained, and the primary winding 8 can be determined based on the input voltage of the transformer in the design.
- the arrangement of the shoreline 8 can be changed freely, and it is also possible to arrange it so as to increase the coupling coefficient of the transformer.
- a plurality of terminals 5 are insert-molded on the bobbin 1, but the primary winding 8 is also insert-molded together at the time of the insert molding, so that the work cycle time is excessive. There is no need to lengthen it.
- the primary winding 8 concentrically with the low voltage portions 6a, 6b of the secondary winding 6, the voltage difference between the primary winding 8 and the secondary winding 6 can be obtained. S is reduced, and the reliability of the transformer is improved by reducing the short circuit due to the potential difference between the adjacent wires on the high voltage side and the bobbin breakage due to discharge.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-333035 | 2004-11-17 | ||
JP2004333035A JP2006147688A (ja) | 2004-11-17 | 2004-11-17 | 高圧トランス |
Publications (1)
Publication Number | Publication Date |
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WO2006054452A1 true WO2006054452A1 (ja) | 2006-05-26 |
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ID=36406997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/020362 WO2006054452A1 (ja) | 2004-11-17 | 2005-11-07 | 高圧トランス |
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JP (1) | JP2006147688A (ja) |
WO (1) | WO2006054452A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007025421A1 (de) * | 2007-05-31 | 2008-12-04 | Vogt Electronic Components Gmbh | Zündtransformator und Zündmodul |
US8193891B2 (en) | 2008-02-20 | 2012-06-05 | Koninklijke Philips Electronics N.V. | High voltage transformer with space-saving primary windings |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023002671A1 (ja) * | 2021-07-19 | 2023-01-26 | ソニーグループ株式会社 | インダクタ装置 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01274410A (ja) * | 1988-04-27 | 1989-11-02 | Hitachi Ltd | 内燃機関用点火コイル |
JPH07283038A (ja) * | 1994-04-05 | 1995-10-27 | Sony Corp | トランス |
JPH08130127A (ja) * | 1994-06-15 | 1996-05-21 | Nippondenso Co Ltd | 高圧トランス及び放電灯回路 |
JPH09283342A (ja) * | 1996-04-08 | 1997-10-31 | Kijima:Kk | 小形トランス |
WO2002015647A1 (fr) * | 2000-08-17 | 2002-02-21 | Mitsubishi Denki Kabushiki Kaisha | Dispositif d'allumage pour lampe a decharge |
JP2003068541A (ja) * | 2001-08-28 | 2003-03-07 | Hitachi Ltd | 内燃機関用点火コイル |
JP2003297652A (ja) * | 2002-04-05 | 2003-10-17 | Kijima:Kk | 小形巻線部品 |
JP2004253814A (ja) * | 2004-04-12 | 2004-09-09 | Kijima:Kk | 小形トランス |
JP2005322799A (ja) * | 2004-05-10 | 2005-11-17 | Sony Corp | トリガーコイル、閃光発生回路および撮像装置 |
-
2004
- 2004-11-17 JP JP2004333035A patent/JP2006147688A/ja active Pending
-
2005
- 2005-11-07 WO PCT/JP2005/020362 patent/WO2006054452A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01274410A (ja) * | 1988-04-27 | 1989-11-02 | Hitachi Ltd | 内燃機関用点火コイル |
JPH07283038A (ja) * | 1994-04-05 | 1995-10-27 | Sony Corp | トランス |
JPH08130127A (ja) * | 1994-06-15 | 1996-05-21 | Nippondenso Co Ltd | 高圧トランス及び放電灯回路 |
JPH09283342A (ja) * | 1996-04-08 | 1997-10-31 | Kijima:Kk | 小形トランス |
WO2002015647A1 (fr) * | 2000-08-17 | 2002-02-21 | Mitsubishi Denki Kabushiki Kaisha | Dispositif d'allumage pour lampe a decharge |
JP2003068541A (ja) * | 2001-08-28 | 2003-03-07 | Hitachi Ltd | 内燃機関用点火コイル |
JP2003297652A (ja) * | 2002-04-05 | 2003-10-17 | Kijima:Kk | 小形巻線部品 |
JP2004253814A (ja) * | 2004-04-12 | 2004-09-09 | Kijima:Kk | 小形トランス |
JP2005322799A (ja) * | 2004-05-10 | 2005-11-17 | Sony Corp | トリガーコイル、閃光発生回路および撮像装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007025421A1 (de) * | 2007-05-31 | 2008-12-04 | Vogt Electronic Components Gmbh | Zündtransformator und Zündmodul |
DE102007025421B4 (de) * | 2007-05-31 | 2009-07-30 | Vogt Electronic Components Gmbh | Zündtransformator und Zündmodul |
US8193891B2 (en) | 2008-02-20 | 2012-06-05 | Koninklijke Philips Electronics N.V. | High voltage transformer with space-saving primary windings |
Also Published As
Publication number | Publication date |
---|---|
JP2006147688A (ja) | 2006-06-08 |
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