JP2002367835A - Inverter transformer - Google Patents
Inverter transformerInfo
- Publication number
- JP2002367835A JP2002367835A JP2001168014A JP2001168014A JP2002367835A JP 2002367835 A JP2002367835 A JP 2002367835A JP 2001168014 A JP2001168014 A JP 2001168014A JP 2001168014 A JP2001168014 A JP 2001168014A JP 2002367835 A JP2002367835 A JP 2002367835A
- Authority
- JP
- Japan
- Prior art keywords
- core
- primary winding
- inverter transformer
- cores
- divided
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示パネル照
明用の放電ランプを点灯させるインバータに用いられる
インバータトランスに係り、特に、複数の二次巻線を備
えたインバータトランスにおけるコアの構造に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter transformer used for an inverter for lighting a discharge lamp for illuminating a liquid crystal display panel, and more particularly to a core structure of an inverter transformer having a plurality of secondary windings. It is.
【０００２】[0002]
【従来の技術】大型の液晶ディスプレイでは、液晶表示
パネルの背面を照明する放電ランプが複数本用いられ
る。しかし従来のインバータトランスは１出力型が一般
的で、放電ランプと同数のインバータトランスが必要な
ため、プリント基板上の広いスペースをインバータトラ
ンスが占めてしまう問題があった。この点を改善したも
のとして、複数の二次巻線を備えた多出力型のインバー
タトランスが考えられている。2. Description of the Related Art A large-sized liquid crystal display uses a plurality of discharge lamps for illuminating the back of a liquid crystal display panel. However, conventional inverter transformers are generally of one-output type and require the same number of inverter transformers as the discharge lamps. Therefore, there is a problem that the inverter transformer occupies a large space on a printed circuit board. As an improvement on this point, a multi-output inverter transformer having a plurality of secondary windings has been considered.
【０００３】図４及び図５は、このような２出力型のイ
ンバータトランスの一例を示すもので、図６はそのコア
10、20の分解斜視図である。一次巻線１に電磁結合した
二つの二次巻線２、３を備えており、一方のコア20に
は、一次巻線１の中心に挿入される脚21と、二次巻線
２、３の中心にそれぞれ挿入される脚22、23が設けられ
ている。一次巻線１及び二次巻線２、３は、それぞれ樹
脂製のボビン４、５、６に巻回されている。FIGS. 4 and 5 show an example of such a two-output type inverter transformer. FIG.
FIG. 21 is an exploded perspective view of 10, 20. It has two secondary windings 2 and 3 electromagnetically coupled to the primary winding 1, and one core 20 has a leg 21 inserted into the center of the primary winding 1 and a secondary winding 2 and 3. There are provided legs 22 and 23 respectively inserted at the center of. The primary winding 1 and the secondary windings 2 and 3 are wound around resin bobbins 4, 5 and 6, respectively.
【０００４】図７及び図８は、従来の別な２出力型イン
バータトランスの例である。一次巻線１を中心にして対
称な位置に、二次巻線２と二次巻線３が配置してあり、
それぞれの二次巻線２、３が一次巻線１に対し同一の結
合度で電磁結合される。平板状のコア30と断面Ｅ型のコ
ア40を備えており、コア40はその中央脚41と外脚42、43
をそれぞれ一次巻線１、二次巻線２、３に挿入してあ
る。４、５、６は、それぞれ一次巻線１、二次巻線２、
３が巻回された樹脂製のボビンである。FIGS. 7 and 8 show another example of a conventional two-output type inverter transformer. The secondary winding 2 and the secondary winding 3 are arranged at symmetrical positions around the primary winding 1,
Each of the secondary windings 2 and 3 is electromagnetically coupled to the primary winding 1 with the same degree of coupling. A core 30 having a flat plate shape and a core 40 having an E-shaped cross section are provided. The core 40 has a central leg 41 and outer legs 42 and 43.
Are inserted into the primary winding 1 and the secondary windings 2 and 3, respectively. Reference numerals 4, 5, and 6 denote primary winding 1, secondary winding 2,
Reference numeral 3 denotes a wound resin bobbin.
【０００５】[0005]
【発明が解決しようとする課題】ところが、図６のよう
なコア20は形状が複雑になるので、成形加工が難しくコ
スト高になる問題があった。一方、図７及び図８のイン
バータトランスは小型で細長い形状になるので、平板形
のコア30は幅が数ミリ程度と狭く、かつ薄いものとな
る。コア30に接着されたボビン４、５、６等とコア30と
の熱膨張係数に差があるので、コア30をあまり薄くする
と、温度変化による収縮時や機械的な衝撃が加わったと
きに割れやすくなる問題があった。本発明は、この種の
インバータトランスにおけるコアの成形加工を容易にす
るとともに、コアの強度を高めることを目的とする。However, since the shape of the core 20 shown in FIG. 6 is complicated, there is a problem that the molding process is difficult and the cost is high. On the other hand, since the inverter transformers of FIGS. 7 and 8 are small and elongated, the flat core 30 is as narrow and thin as about several millimeters. Since there is a difference in the coefficient of thermal expansion between the bobbin 4, 5, 6, etc. adhered to the core 30 and the core 30, if the core 30 is too thin, it will break when contracted due to temperature change or when a mechanical shock is applied. There was a problem that became easier. SUMMARY OF THE INVENTION It is an object of the present invention to facilitate forming of a core in this type of inverter transformer and to increase the strength of the core.
【０００６】[0006]
【課題を解決するための手段】本発明は、突き合わされ
て閉磁路を形成する一対のコアと、一つの一次巻線と、
この一次巻線に電磁結合した複数の二次巻線を備え、一
次巻線の中心に挿入される第１の脚と二次巻線の中心に
それぞれ挿入される複数の第２の脚を前記一対のコアに
設けたインバータトランスにおいて、少なくとも一方の
コアを二分割した構成を特徴とする。SUMMARY OF THE INVENTION The present invention comprises a pair of cores butted together to form a closed magnetic circuit, one primary winding,
A plurality of secondary windings electromagnetically coupled to the primary winding, a first leg inserted at the center of the primary winding and a plurality of second legs inserted at the center of the secondary winding, respectively. In an inverter transformer provided on a pair of cores, at least one of the cores is divided into two parts.
【０００７】[0007]
【実施例】図４〜図６のインバータトランスに本発明を
適用したときの下側のコア20を図１に示す。コア20は、
図で縦方向の中心線を境に線対称の形状をしており、こ
の中心線の位置で切断して、20ａと20ｂの二つに分割し
てある。コア20は、脚22と脚23の間を通り、かつ脚21の
中央を通る直線に沿って、対称な形に二分割されている
ことになる。なお、下側のコア20だけでなく、上側のコ
ア10も二分割してよい。FIG. 1 shows a lower core 20 when the present invention is applied to the inverter transformers shown in FIGS. Core 20 is
In the figure, the shape is line-symmetric with respect to the center line in the vertical direction. The core 20 is bisected in a symmetrical shape along a straight line passing between the legs 22 and 23 and passing through the center of the leg 21. Note that not only the lower core 20 but also the upper core 10 may be divided into two parts.
【０００８】分割した上側のコア10を図２に示す。この
コア10も中心線を境にした対称形であり、中心線の位置
で切断して10ａと10ｂの二つに分割してある。このよう
に二分割したコア20やコア10は、それぞれの切断面が近
接した位置で対向するようにしてインバータトランスに
組み込まれる。インバータトランスを試作して測定した
結果、二分割したコア10、20を用いた場合も、インダク
タンスその他の電気的特性は分割前のコア10、20を使用
したときと殆ど差が出ないことを確認した。FIG. 2 shows the divided upper core 10. The core 10 is also symmetrical with respect to the center line, and is cut at the position of the center line and divided into two parts 10a and 10b. The core 20 and the core 10 thus divided into two are assembled into the inverter transformer such that their cut surfaces face each other at close positions. As a result of a prototype inverter transformer measurement, it was confirmed that the inductance and other electrical characteristics were almost the same when using the cores 10 and 20 before splitting even when the cores 10 and 20 were used. did.
【０００９】図３は、他の実施例を示すもので、図７及
び図８に示したインバータトランスの上側のコア30を、
30ａと30ｂの二つに均等に分割した例である。符号35で
示したのが切断箇所であり、コア30の長辺側の中央を通
る直線に沿って切断されている。なお、左右対称にコア
を分割した実施例で説明したが、分割後のコアはそれぞ
れ磁気回路の最小断面積を確保できる範囲のものであれ
ばよく、必ずしも左右対称の形にしなくてもよい。FIG. 3 shows another embodiment, in which the upper core 30 of the inverter transformer shown in FIGS.
This is an example of equally dividing into 30a and 30b. Reference numeral 35 denotes a cut portion, which is cut along a straight line passing through the center of the long side of the core 30. Although the embodiment has been described in which the cores are divided symmetrically, the divided cores may be in any range as long as the minimum cross-sectional area of the magnetic circuit can be ensured, and need not necessarily be symmetrical.
【００１０】[0010]
【発明の効果】本発明によれば、インバータトランスの
特性を低下させることなく、複雑な形状をしたコアの成
形加工を容易に行えるので、製造コストを低減できる。
また、細長いコアであっても二分割されるために、温度
変化による収縮の影響を受けにくくなるばかりでなく、
機械的な衝撃に対する強度も向上する。According to the present invention, since a core having a complicated shape can be easily formed without deteriorating the characteristics of the inverter transformer, the manufacturing cost can be reduced.
In addition, since the elongated core is divided into two parts, not only is it hardly affected by shrinkage due to temperature change,
Strength against mechanical shock is also improved.
【図１】 本発明の一実施例に係るコアの平面図FIG. 1 is a plan view of a core according to an embodiment of the present invention.
【図２】 本発明の他の実施例に係るコアの平面図FIG. 2 is a plan view of a core according to another embodiment of the present invention.
【図３】 本発明のさらに他の実施例を示すインバータ
トランスの平面図FIG. 3 is a plan view of an inverter transformer showing still another embodiment of the present invention.
【図４】 従来のインバータトランスの一例を示す平面
図FIG. 4 is a plan view showing an example of a conventional inverter transformer.
【図５】 図４のＡ−Ａ線断面図FIG. 5 is a sectional view taken along line AA of FIG. 4;
【図６】 同トランスのコアの分解斜視図FIG. 6 is an exploded perspective view of the core of the transformer.
【図７】 従来のインバータトランスの他の例を示す正
面断面図FIG. 7 is a front sectional view showing another example of the conventional inverter transformer.
【図８】 同トランスの平面図FIG. 8 is a plan view of the transformer.
１ 一次巻線 ２ 二次巻線 ３ 二次巻線 10 コア 20 コア 30 コア 1 Primary winding 2 Secondary winding 3 Secondary winding 10 cores 20 cores 30 cores
Claims (4)
コアと、一つの一次巻線と、該一次巻線に電磁結合した
複数の二次巻線を備え、一次巻線の中心に挿入される第
１の脚と二次巻線の中心にそれぞれ挿入される複数の第
２の脚を該一対のコアに設けたインバータトランスにお
いて、少なくとも一方のコアを二分割したことを特徴と
するインバータトランス。1. A primary winding comprising: a pair of cores which are joined to each other to form a closed magnetic circuit; one primary winding; and a plurality of secondary windings electromagnetically coupled to the primary winding. An inverter transformer in which a plurality of second legs respectively inserted at the center of a first leg and a secondary winding are provided in the pair of cores, and at least one of the cores is divided into two. .
の中央を通る直線に沿ってコアを二分割した請求項１の
インバータトランス。2. The inverter transformer according to claim 1, wherein the core is divided into two along a straight line passing between different second legs and passing through the center of the first leg.
を、該中心線の位置で二分割した請求項１のインバータ
トランス。3. The inverter transformer according to claim 1, wherein the core having a shape symmetrical with respect to the center line is divided into two at the position of the center line.
１、第２の二次巻線をそれぞれ配置し、コアの長辺側の
中央を通る直線に沿って該コアを二分割した請求項１の
インバータトランス。4. The first and second secondary windings are respectively arranged at positions symmetrical about the primary winding, and the core is divided into two along a straight line passing through the center on the long side of the core. The inverter transformer according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001168014A JP2002367835A (en) | 2001-06-04 | 2001-06-04 | Inverter transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001168014A JP2002367835A (en) | 2001-06-04 | 2001-06-04 | Inverter transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002367835A true JP2002367835A (en) | 2002-12-20 |
Family
ID=19010311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001168014A Pending JP2002367835A (en) | 2001-06-04 | 2001-06-04 | Inverter transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002367835A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007507855A (en) * | 2003-10-06 | 2007-03-29 | マイクロセミ・コーポレーション | Current distribution method and apparatus for operating a plurality of CCF lamps |
| US7977888B2 (en) | 2003-10-06 | 2011-07-12 | Microsemi Corporation | Direct coupled balancer drive for floating lamp structure |
| USRE46502E1 (en) | 2011-05-03 | 2017-08-01 | Microsemi Corporation | High efficiency LED driving method |
-
2001
- 2001-06-04 JP JP2001168014A patent/JP2002367835A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007507855A (en) * | 2003-10-06 | 2007-03-29 | マイクロセミ・コーポレーション | Current distribution method and apparatus for operating a plurality of CCF lamps |
| JP4658061B2 (en) * | 2003-10-06 | 2011-03-23 | マイクロセミ・コーポレーション | Current distribution method and apparatus for operating a plurality of CCF lamps |
| US7977888B2 (en) | 2003-10-06 | 2011-07-12 | Microsemi Corporation | Direct coupled balancer drive for floating lamp structure |
| US7990072B2 (en) | 2003-10-06 | 2011-08-02 | Microsemi Corporation | Balancing arrangement with reduced amount of balancing transformers |
| US8008867B2 (en) | 2003-10-06 | 2011-08-30 | Microsemi Corporation | Arrangement suitable for driving floating CCFL based backlight |
| US8222836B2 (en) | 2003-10-06 | 2012-07-17 | Microsemi Corporation | Balancing transformers for multi-lamp operation |
| USRE46502E1 (en) | 2011-05-03 | 2017-08-01 | Microsemi Corporation | High efficiency LED driving method |
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Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060303 |
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