JP2001237126A - Transformer and its manufacturing method - Google Patents
Transformer and its manufacturing methodInfo
- Publication number
- JP2001237126A JP2001237126A JP2000054568A JP2000054568A JP2001237126A JP 2001237126 A JP2001237126 A JP 2001237126A JP 2000054568 A JP2000054568 A JP 2000054568A JP 2000054568 A JP2000054568 A JP 2000054568A JP 2001237126 A JP2001237126 A JP 2001237126A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- transformer
- windings
- coil bobbin
- wound around
- 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.)
- Granted
Links
Classifications
-
- 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
- H01F2038/006—Adaptations of transformers or inductances for specific applications or functions matrix transformer consisting of several interconnected individual transformers working as a whole
Landscapes
- Coils Of Transformers For General Uses (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、プッシュプル型の
電源回路に用いるトランスに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer used in a push-pull type power supply circuit.
【０００２】[0002]
【従来の技術】一般に、プッシュプル型（センタタップ
型ともいう）のスイッチング電源回路には、図１７に示
すように、１次巻線ｎ１と２次巻線ｎ２とにそれぞれセ
ンタタップを備えるトランスＴが用いられる。この電源
回路は、制御回路ＣＮ１，ＣＮ２により高周波（一般に
は数十ｋＨｚ）で交互にオンオフされる２個のスイッチ
ング素子Ｑ１，Ｑ２を備える。両スイッチング素子Ｑ
１，Ｑ２は一端が共通に接続され（図示例ではスイッチ
ング素子Ｑ１，Ｑ２としてＭＯＳＦＥＴを用いており、
ソースが共通に接続されている）、各他端がそれぞれト
ランスＴの１次巻線ｎ１の各一端に接続されている。１
次巻線ｎ１のセンタタップは直流電源ＤＣの一方の出力
端（図示例では正極）に接続され、スイッチング素子Ｑ
１，Ｑ２の上記一端は直流電源ＤＣの他方の出力端（図
示例では負極）に接続される。トランスＴの１次巻線の
各一端とセンタタップとの間にはそれぞれコンデンサＣ
１，Ｃ２が接続される。コンデンサＣ１，Ｃ２はトラン
スＴの漏れインダクタンスとともに共振回路を構成し、
スイッチング素子Ｑ１，Ｑ２のゼロボルトスイッチング
を可能にする。2. Description of the Related Art Generally, a push-pull type (also referred to as a center tap type) switching power supply circuit has a transformer having a center tap in each of a primary winding n1 and a secondary winding n2 as shown in FIG. T is used. This power supply circuit includes two switching elements Q1 and Q2 that are alternately turned on and off at a high frequency (generally several tens of kHz) by control circuits CN1 and CN2. Both switching elements Q
1 and Q2 are connected at one end in common (in the illustrated example, MOSFETs are used as the switching elements Q1 and Q2,
And the other end is connected to one end of the primary winding n1 of the transformer T, respectively. 1
The center tap of the next winding n1 is connected to one output terminal (positive in the illustrated example) of the DC power supply DC, and the switching element Q
1 and Q2 are connected to the other output terminal (negative pole in the illustrated example) of the DC power supply DC. A capacitor C is provided between each end of the primary winding of the transformer T and the center tap.
1 and C2 are connected. The capacitors C1 and C2 constitute a resonance circuit together with the leakage inductance of the transformer T,
This enables zero volt switching of the switching elements Q1 and Q2.
【０００３】また、トランスＴの２次巻線ｎ２の両端に
はそれぞれダイオードＤ１，Ｄ２のアノードが接続され
る。ダイオードＤ１，Ｄ２のカソードは共通に接続さ
れ、トランスＴの２次巻線ｎ２のセンタタップとの間で
脈流電圧を出力する。つまり、トランスＴの２次巻線ｎ
２とダイオードＤ１，Ｄ２とにより全波整流回路が構成
されている。全波整流回路の出力はインダクタＬとコン
デンサＣとからなるチョークインプット型のフィルタ回
路を通して負荷Ｚに供給される。The anodes of diodes D1 and D2 are connected to both ends of a secondary winding n2 of a transformer T, respectively. The cathodes of the diodes D1 and D2 are commonly connected, and output a pulsating voltage between the cathode of the secondary winding n2 of the transformer T and the center tap. That is, the secondary winding n of the transformer T
2 and the diodes D1 and D2 form a full-wave rectifier circuit. The output of the full-wave rectifier circuit is supplied to a load Z through a choke input type filter circuit including an inductor L and a capacitor C.
【０００４】しかして、スイッチング素子Ｑ１，Ｑ２が
交互にオンオフされると、１次巻線ｎ１の各一端とセン
タタップとの間で交互に電流が流れ、２次巻線ｎ２には
１次巻線ｎ１に流れる電流の向きに応じて交番する電圧
が発生する。つまり、１次巻線ｎ１においてセンタタッ
プと各一端との間の２つの巻線ｎ１１，ｎ１２には、つ
ねに一方にのみ電流が流れ、電流が同時に流れることは
ない。このように直流−交流変換が行われ、トランスＴ
の２次巻線ｎ２に発生した交番電圧は整流されフィルタ
回路を通ることによって直流電圧に変換されるから、図
示例の回路では直流−直流変換が行われる。When the switching elements Q1 and Q2 are turned on and off alternately, current flows alternately between one end of the primary winding n1 and the center tap, and the primary winding is turned on the secondary winding n2. An alternating voltage is generated according to the direction of the current flowing through the line n1. That is, in the two windings n11 and n12 between the center tap and each one end of the primary winding n1, a current always flows to only one of them, and no current flows at the same time. Thus, the DC-AC conversion is performed, and the transformer T
Since the alternating voltage generated in the secondary winding n2 is rectified and converted into a DC voltage by passing through a filter circuit, the circuit in the illustrated example performs DC-DC conversion.
【０００５】ところで、上述のように漏れインダクタン
スを共振用のインダクタンスとして利用するために、１
次巻線ｎ１と２次巻線ｎ２とを完全に結合させず分割巻
きにしてあり、１次巻線ｎ１と２次巻線ｎ２との間の磁
路を形成するコア３にはエアギャップが形成される。上
述したように、１次巻線ｎ１と２次巻線ｎ２とはそれぞ
れセンタタップを有しているから、１次巻線ｎ１と２次
巻線ｎ２とはそれぞれセンタタップと各一端との間の２
個ずつの巻線ｎ１１，ｎ１２、ｎ２１，ｎ２２を備えて
おり、１次巻線ｎ１と２次巻線ｎ２とを分割巻きにする
ために、これらの巻線ｎ１１，ｎ１２、ｎ２１，ｎ２２
を図１８に示す位置関係にすることが考えられている
（特開昭６３−２１１７１１号公報）。By the way, in order to use the leakage inductance as the resonance inductance as described above, 1
The secondary winding n1 and the secondary winding n2 are not completely connected but are divided winding, and an air gap is formed in the core 3 which forms a magnetic path between the primary winding n1 and the secondary winding n2. It is formed. As described above, the primary winding n1 and the secondary winding n2 each have a center tap, so that the primary winding n1 and the secondary winding n2 are located between the center tap and each end. 2
The windings n11, n12, n21, and n22 are provided for each of the windings, and these windings n11, n12, n21, and n22 are used to separate the primary winding n1 and the secondary winding n2 from each other.
Is considered to be a positional relationship shown in FIG. 18 (Japanese Patent Laid-Open No. 63-211171).
【０００６】すなわち、図１８（ａ）に示すものは、コ
イルボビン１の長手方向の両端部に鍔部２ａ，２ｂを設
けるとともに、長手方向の中間部に１個の分割鍔２ｃを
形成し、鍔部２ａと分割鍔２ｃとの間に１次巻線ｎ１を
形成する２個の巻線ｎ１１，ｎ１２を順に重ねて巻装
し、鍔部２ｂと分割鍔２ｃとの間に２次巻線ｎ２を形成
する２個の巻線ｎ２１，ｎ２２を順に重ねて巻装してい
る。また、図１８（ｂ）に示すものは、コイルボビン１
の長手方向の中間部に２個の分割鍔２ｄ，２ｅを形成
し、鍔部２ａと分割鍔２ｄとの間に１次巻線ｎ１の一方
の巻線ｎ１１を巻装し、鍔部２ｂと分割鍔２ｅとの間に
１次巻線ｎ１の他方の巻線ｎ１２を巻装し、さらに両分
割鍔２ｄ，２ｅの間に２次巻線ｎ２の各巻線ｎ２１，ｎ
２２を順に重ねて巻装してある。図１８（ｃ）に示すも
のは、コイルボビン１の長手方向の中間部に３個の分割
鍔２ｆ〜２ｈを形成し、分割された各部位にそれぞれ巻
線ｎ１１，ｎ１２、ｎ２１，ｎ２２を巻装してある。That is, in FIG. 18A, flanges 2a and 2b are provided at both ends in the longitudinal direction of the coil bobbin 1, and one split flange 2c is formed at an intermediate portion in the longitudinal direction. Two windings n11 and n12 forming a primary winding n1 are sequentially stacked and wound between the portion 2a and the split flange 2c, and a secondary winding n2 is formed between the flange 2b and the split flange 2c. The two windings n21 and n22 forming the above are sequentially superposed and wound. FIG. 18B shows the coil bobbin 1
Are formed at the intermediate portion in the longitudinal direction of the first and second windings, and one winding n11 of the primary winding n1 is wound between the flange 2a and the split flange 2d. The other winding n12 of the primary winding n1 is wound around the split collar 2e, and the windings n21, n of the secondary winding n2 are further mounted between the split collars 2d, 2e.
22 are sequentially wound and wound. 18 (c), three divided flanges 2f to 2h are formed at an intermediate portion in the longitudinal direction of the coil bobbin 1, and windings n11, n12, n21, and n22 are wound around the respective divided portions. I have.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上述したト
ランスＴは、巻線に流れた電流と巻線の抵抗とから算出
される損失以上の損失が生じる。この損失の１つの原因
は漏れインダクタンスを共振用のインダクタンスとして
利用するために１次巻線ｎ１と２次巻線ｎ２とを完全に
結合させていないことであるが、他の原因としては巻線
に高周波電流が流れることによる近接効果の影響が大き
いと考えられる。すなわち、トランスＴでの損失を低減
するには近接効果の影響を低減することが要求される。Incidentally, in the above-described transformer T, a loss greater than the loss calculated from the current flowing through the winding and the resistance of the winding occurs. One cause of this loss is that the primary winding n1 and the secondary winding n2 are not completely coupled in order to use the leakage inductance as resonance inductance. It is considered that the effect of the proximity effect due to the flow of the high-frequency current through the substrate is large. That is, to reduce the loss in the transformer T, it is required to reduce the influence of the proximity effect.
【０００８】本発明は上記事由に鑑みて為されたもので
あり、その目的は、損失を低減したトランスを提供する
ことにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transformer with reduced loss.
【０００９】[0009]
【課題を解決するための手段】請求項１の発明は、コア
の異なる部位に巻装された１次巻線と２次巻線との少な
くとも一方がセンタタップと各一端との間の２つの巻線
からなるトランスであって、前記２つの巻線が、並列接
続された複数本の線路からなり、各線路が１つの層とな
るとともに、各巻線の層が交互に重なるようにコイルボ
ビンに巻装されているものである。According to a first aspect of the present invention, at least one of a primary winding and a secondary winding wound around different portions of a core has two cores between a center tap and each end. A transformer comprising windings, wherein the two windings are composed of a plurality of lines connected in parallel, and each line is a single layer, and the windings are wound around a coil bobbin such that the layers of the windings alternately overlap. It is what is equipped.
【００１０】請求項２の発明は、請求項１の発明におい
て、前記１次巻線のみにおいて２つの巻線の層が交互に
重なるようにコイルボビンに巻装されているものであ
る。According to a second aspect of the present invention, in the first aspect of the present invention, only the primary winding is wound around the coil bobbin such that the layers of the two windings alternately overlap.
【００１１】請求項３の発明は、請求項１の発明におい
て、前記１次巻線と前記２次巻線との両方がセンタタッ
プを有し、それぞれの２つの巻線の層が交互に重なるよ
うにコイルボビンに巻装されているものである。According to a third aspect of the present invention, in the first aspect of the invention, both the primary winding and the secondary winding have a center tap, and the layers of the two windings alternately overlap. Is wound around a coil bobbin.
【００１２】請求項４の発明は、請求項２の発明におい
て、前記１次巻線と前記２次巻線との両方がセンタタッ
プを有し、２次巻線における２つの巻線が１次巻線を両
側から挟む形で配置されているものである。According to a fourth aspect of the present invention, in the second aspect, both the primary winding and the secondary winding have a center tap, and two windings of the secondary winding are primary windings. It is arranged so that the winding is sandwiched from both sides.
【００１３】請求項５の発明は、請求項１ないし請求項
４の発明において、前記コアは２つのＥ型コアを組み合
わせた日字状に形成されているものである。According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the core is formed in a Japanese character shape by combining two E-shaped cores.
【００１４】請求項６の発明は、請求項１ないし請求項
３の発明において、前記１次巻線を磁路の一部が開放さ
れた第１のコアに巻装した第１のトランス半体と、前記
２次巻線を磁路の一部が開放された第２のコアに巻装し
た第２のトランス半体とを備え、第１および第２のコア
において磁路の開放されている部位同士を突き合わせる
形で第１および第２のトランス半体を分離可能に対向配
置するものである。According to a sixth aspect of the present invention, in the first to third aspects of the present invention, the first transformer half has the primary winding wound on a first core having a part of a magnetic path opened. And a second transformer half in which the secondary winding is wound around a second core having a part of a magnetic path opened, and the magnetic path is opened in the first and second cores. The first and second transformer halves are arranged so as to be separably opposed to each other in such a manner that the parts are abutted against each other.
【００１５】請求項７の発明は、請求項１ないし請求項
６の発明において、少なくとも１つの層は撚り線を巻装
して形成されているものである。According to a seventh aspect of the present invention, in the first to sixth aspects, at least one layer is formed by winding a stranded wire.
【００１６】請求項８の発明は、請求項１ないし請求項
７の発明において、前記コイルボビンにおいて各巻線を
巻装する領域がそれぞれ仕切られ、各巻線を巻装する領
域を埋めて隙間を形成しないように各層が巻装されてい
るものである。According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, a region where each winding is wound on the coil bobbin is partitioned, and no gap is formed by filling the region where each winding is wound. Each layer is wound as described above.
【００１７】請求項９の発明は、コアの異なる部位に巻
装された１次巻線と２次巻線との少なくとも一方がセン
タタップと各一端との間の２つの巻線からなるトランス
であって、上記２つの巻線はそのセンタタップ側の各端
部がコイルボビンの一方側に、センタタップ側でない端
部をコイルボビンの他方側に位置して２つの巻線のセン
タタップ側の端部がセンタタップに接続されているもの
である。According to a ninth aspect of the present invention, there is provided a transformer in which at least one of a primary winding and a secondary winding wound around different portions of a core includes two windings between a center tap and each end. The two windings each have a center tap side end located on one side of the coil bobbin, and an end other than the center tap side located on the other side of the coil bobbin. Is connected to the center tap.
【００１８】請求項１０の発明は、請求項９の発明にお
いて、２つの巻線のコイルボビンに対する巻き始め位置
が同じとなっているものである。According to a tenth aspect of the present invention, in the ninth aspect of the present invention, the winding start positions of the two windings with respect to the coil bobbin are the same.
【００１９】請求項１１の発明は、請求項９または請求
項１０の発明において、次巻線用のコイルボビンと２次
巻線用のコイルボビンとが独立しているとともに、これ
らコイルボビンは外部接続用ピンを備えた台座に連結さ
れて上記ピンに巻線が接続されているものである。According to an eleventh aspect of the present invention, in the ninth or tenth aspect of the present invention, the coil bobbin for the secondary winding and the coil bobbin for the secondary winding are independent, and these coil bobbins are connected to external connection pins. And a winding is connected to the pin.
【００２０】請求項１２の発明は、コアの異なる部位に
巻装された１次巻線と２次巻線との少なくとも一方がセ
ンタタップと各一端との間の２つの巻線からなるととも
にこれら２つの巻線が、並列接続された複数本の線路か
らなるトランスの製造方法であり、第１の巻線の第１の
線路をコイルボビンに巻き、ついで第１の巻線の第１の
線路の外周に第２の巻線の第１の線路を逆巻きで巻き、
この後、第２の巻線の第１の線路の外周に第１の巻線の
第２の線路を巻き、さらに第１の巻線の第２の線路の外
周に第２の巻線の第２の線路を巻いて、上記４つの線路
のコイルボビンの一方側に位置する各端部をセンタタッ
プに接続し、コイルボビンの他方側に位置する第１の巻
線の２つの線路の各端部と第２の巻線の２つの線路の各
端部とを夫々相互に接続するものである。According to a twelfth aspect of the present invention, at least one of the primary winding and the secondary winding wound around different portions of the core comprises two windings between the center tap and each end. A method for manufacturing a transformer in which two windings are composed of a plurality of lines connected in parallel, wherein a first line of a first winding is wound around a coil bobbin, and then a first line of the first winding is wound. A first line of a second winding is wound around the outer periphery in a reverse winding,
Thereafter, the second line of the first winding is wound around the outer periphery of the first line of the second winding, and the second line of the second winding is wound around the outer periphery of the second line of the first winding. And two ends of one of the four lines, which are located on one side of the coil bobbin, are connected to a center tap, and the other ends of the two lines of the first winding, which are located on the other side of the coil bobbin, are connected to each other. The two ends of the two lines of the second winding are connected to each other.
【００２１】請求項１３の発明は、請求項１２の発明に
おいて、巻線の各端部はコイルボビンに設けたプリント
板取付用のピンに接続するものである。According to a thirteenth aspect of the present invention, in the twelfth aspect, each end of the winding is connected to a pin for mounting a printed board provided on a coil bobbin.
【００２２】請求項１４の発明は、各巻線の各線路をコ
イルボビンに対して同一位置から巻き始めるものであ
る。According to a fourteenth aspect of the present invention, each line of each winding starts to be wound around the coil bobbin from the same position.
【００２３】[0023]
【発明の実施の形態】以下の実施形態では、図８に示し
たスイッチング電源回路に用いるトランスＴを示す。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following embodiment, a transformer T used in the switching power supply circuit shown in FIG. 8 will be described.
【００２４】（第１の実施の形態）本実施形態は基本的
には、図１に示すように、コイルボビン１の長手方向に
おいて、１次巻線ｎ１を巻装する領域と２次巻線ｎ２を
巻装する領域とを形成し、１次巻線ｎ１を形成する２個
の巻線ｎ１１，ｎ１２と２次巻線ｎ２を形成する２個の
巻線ｎ２１，ｎ２２とをそれぞれいわゆるサンドイッチ
巻きとしてある。サンドイッチ巻きとは、２つの巻線を
多層巻きとする場合に、１層ずつ異なる巻線を交互に巻
装する巻き方である。また、コア３には２個のＥ型コア
３ａ，３ｂを組み合わせた日字状のＥＥ型コアを用いて
おり、Ｅ型コア３ａ，３ｂの中央片をコイルボビン１に
挿通して１次巻線ｎ１と２次巻線ｎ２との中心に通し、
Ｅ型コア３ａ，３ｂの残りの部分で１次巻線ｎ１と２次
巻線ｎ２とを囲むようにして磁路を形成してある。ここ
に、漏れ磁束を得るために、Ｅ型コア３ａ，３ｂの突き
合わせ部分にはエアギャップが形成される。(First Embodiment) In this embodiment, as shown in FIG. 1, basically, a region where a primary winding n1 is wound and a secondary winding n2 are arranged in the longitudinal direction of a coil bobbin 1. And the two windings n11 and n12 forming the primary winding n1 and the two windings n21 and n22 forming the secondary winding n2 are respectively formed as so-called sandwich windings. is there. Sandwich winding is a winding method in which different windings are alternately wound one layer at a time when two windings are formed into a multilayer winding. The core 3 is a Japanese-character EE-type core in which two E-type cores 3a and 3b are combined, and the center piece of the E-type cores 3a and 3b is inserted into the coil bobbin 1 to perform primary winding. through the center of n1 and the secondary winding n2,
A magnetic path is formed so as to surround the primary winding n1 and the secondary winding n2 in the remaining portions of the E-shaped cores 3a and 3b. Here, an air gap is formed at the butted portion of the E-shaped cores 3a and 3b in order to obtain a leakage magnetic flux.
【００２５】さらに具体的に説明すると、図２に示すよ
うに、コイルボビン１は長手方向の両端部に鍔部２ａ，
２ｂが形成されるとともに中間部に分割鍔２ｃが形成さ
れることによって、１次巻線ｎ１を巻装する領域と２次
巻線ｎ２を巻装する領域とに分割されており、鍔部２ａ
と分割鍔２ｃとの間には１次巻線ｎ１を形成する２個の
巻線ｎ１１，ｎ１２が１層ずつ交互に巻装される。ここ
に、一方の巻線ｎ１１を密着巻きで１層分巻装した後に
は巻線ｎ１１の外周に絶縁テープ４が巻かれ、絶縁テー
プ４の外側に他方の巻線ｎ１２が１層分巻装される。さ
らに、巻線ｎ１２の外側に絶縁テープ４が巻かれ、絶縁
テープ４の外側に上記一方の巻線ｎ１１が巻装される。
同様の手順で２つの巻線ｎ１１，ｎ１２が順に１層ずつ
交互に巻装されるのである。図示例では巻線ｎ１１，ｎ
１２を４層に巻装してあり、各層はそれぞれ図３のよう
に巻装されるとともに、図３において同符号を付した各
層の端点が互いに接続される。つまり、同じ巻線ｎ１
１，ｎ１２、ｎ２１，ｎ２２を形成する各層同士は互い
に並列接続され、異なる巻線ｎ１１，ｎ１２、ｎ２１ｎ
２２のうちセンタタップとなる端点は互いに接続され
る。つまり、図示例では１次巻線ｎ１および２次巻線ｎ
２をそれぞれ並列接続された複数の線路に分割し、各線
路を１つの層とする形で異なる巻線ｎ１１，ｎ１２、ｎ
２１，ｎ２２を交互に重ねて巻装するのである。こうし
て端点ロがセンタタップになり、端点イが巻線ｎ１１の
一端、端点ハが巻線ｎ１２の一端になる。２次巻線ｎ２
についても同様に巻装される。More specifically, as shown in FIG. 2, the coil bobbin 1 has flange portions 2a, 2a at both ends in the longitudinal direction.
2b and a split flange 2c formed at an intermediate portion, the split portion is divided into a region for winding the primary winding n1 and a region for winding the secondary winding n2.
The two windings n11 and n12 forming the primary winding n1 are alternately wound one by one between the and the split flange 2c. Here, after one winding n11 is wound by one layer in close contact winding, the insulating tape 4 is wound around the outer periphery of the winding n11, and the other winding n12 is wound by one layer outside the insulating tape 4. Is done. Further, the insulating tape 4 is wound around the outside of the winding n12, and the one winding n11 is wound around the outside of the insulating tape 4.
In a similar procedure, the two windings n11 and n12 are alternately wound one layer at a time. In the illustrated example, the windings n11 and n
12 are wound in four layers, each layer is wound as shown in FIG. 3, and the end points of the layers denoted by the same reference numerals in FIG. 3 are connected to each other. That is, the same winding n1
1, n12, n21, n22 are connected in parallel with each other to form different windings n11, n12, n21n.
The end points of 22 that are the center taps are connected to each other. That is, in the illustrated example, the primary winding n1 and the secondary winding n
2 are divided into a plurality of lines respectively connected in parallel, and the windings n11, n12, n
21 and n22 are alternately stacked and wound. Thus, the end point B becomes the center tap, the end point A becomes one end of the winding n11, and the end point C becomes one end of the winding n12. Secondary winding n2
Are similarly wound.
【００２６】したがって、たとえば巻線ｎ１１の断面積
をＳとし、第１層と第３層として巻装する巻線に直径の
等しいものを用いるとすれば、１層当たりの巻線の断面
積はＳ／２になる。他の巻線ｎ１２、ｎ２１，ｎ２２も
同様である。Therefore, for example, if the cross-sectional area of the winding n11 is S, and the windings having the same diameter are used as the first and third layers, the cross-sectional area of the winding per layer is as follows. S / 2. The same applies to the other windings n12, n21, n22.
【００２７】上述したプッシュプル型のスイッチング電
源回路では、１次巻線ｎ１の各巻線ｎ１１，ｎ１２に同
時に電流が流れることがないから、２つの巻線ｎ１１，
ｎ１２の相互作用はほとんどない。しかも各巻線ｎ１
１，ｎ１２、ｎ２１，ｎ２２を形成する層間には他方の
巻線ｎ１１，ｎ１２、ｎ２１，ｎ２２を形成する層が存
在するから（たとえば、巻線ｎ１１の層の間に巻線ｎ１
２の層が存在する）、１つの巻線ｎ１１，ｎ１２、ｎ２
１，ｎ２２の層間における近接作用の影響が軽減され
る。つまり、１つの巻線ｎ１１，ｎ１２、ｎ２１，ｎ２
２を並列接続された複数の線路に分割して各線路でそれ
ぞれ層を形成するとともに、層間に他の巻線ｎ１１，ｎ
１２、ｎ２１，ｎ２２の層を介在させることによって、
近接効果の影響を軽減することができる。一方、１次巻
線ｎ１と２次巻線ｎ２とはコイルボビン１において分割
鍔２ｃにより分割された異なる領域にそれぞれ巻装さ
れ、コアにエアギャップが形成されているから完全には
結合しておらず漏れインダクタを利用することができ
る。In the above-described push-pull type switching power supply circuit, current does not flow through each of the windings n11 and n12 of the primary winding n1 at the same time.
There is almost no interaction of n12. Moreover, each winding n1
1, n12, n21, and n22, there is a layer that forms the other winding n11, n12, n21, and n22 (for example, a winding n1 between the layers of the winding n11).
2 layers), one winding n11, n12, n2
The influence of the proximity action between the layers 1 and n22 is reduced. That is, one winding n11, n12, n21, n2
2 is divided into a plurality of lines connected in parallel to form a layer in each line, and another winding n11, n
By interposing 12, n21 and n22 layers,
The effect of the proximity effect can be reduced. On the other hand, the primary winding n1 and the secondary winding n2 are wound around different regions of the coil bobbin 1 divided by the dividing flange 2c, respectively, and are completely connected because an air gap is formed in the core. A leakage inductor can be used.
【００２８】上述した構成例では、１つの巻線ｎ１１，
ｎ１２、ｎ２１，ｎ２２を２つの線路に分割している
が、３つ以上の線路に分割してもよい。また、分割する
に際して各線路の断面積は必ずしも均等でなくてもよ
い。たとえば、全体の断面積をＳとするとき２分割にあ
たって、一方の断面積をＳ／３とし、他方の断面積を２
Ｓ／３などとしてもよい。In the above configuration example, one winding n11,
Although n12, n21, and n22 are divided into two lines, they may be divided into three or more lines. Also, when dividing, the cross-sectional area of each line does not necessarily have to be uniform. For example, when the entire sectional area is S, when dividing into two, one sectional area is S / 3 and the other is 2
It may be S / 3 or the like.
【００２９】（第２の実施の形態）本実施形態は、図４
（ａ）に示すように、各巻線ｎ１１，ｎ１２、ｎ２１，
ｎ２２を分割した線路をさらに２本の素線によって形成
し、両素線をコイルボビン１に同時に巻装したものであ
る（要するに、両巻線ｎ１１，ｎ１２、ｎ２１，ｎ２２
をバイファイラ巻きにしてある）。これは１層当たりの
巻数が少ないなどの理由によって、図４（ｂ）のように
コイルボビン１において１次巻線ｎ１または２次巻線ｎ
２を巻装する領域に巻線の巻装されない部分が生じるよ
うなときに有効であって、複数の線路を１層に同時に巻
装することで巻線を巻装する領域の両端間が埋まるよう
にする。(Second Embodiment) This embodiment is different from FIG.
As shown in (a), each winding n11, n12, n21,
The line obtained by dividing n22 is further formed by two strands, and both strands are simultaneously wound around the coil bobbin 1 (in short, both windings n11, n12, n21, n22).
Is wound by bifilar). This is because the number of turns per layer is small or the like, as shown in FIG.
This is effective when an area where the winding is not wound is generated in the area where the winding 2 is wound. By simultaneously winding a plurality of lines on one layer, a gap between both ends of the area where the winding is wound is filled. To do.
【００３０】本実施形態の構成は通常の単線を用いる代
わりに細径の線を撚ったリッツ線を用いることでも実現
できる。しかもリッツ線のような撚り線を用いると表皮
効果の影響を低減することができる。また、巻線には一
般の銅線のような断面円形の材料ではなく、銅箔のよう
な断面矩形状などの材料を用いることも可能である。他
の構成および動作は第１の実施の形態と同様である。The configuration of the present embodiment can be realized by using a litz wire in which a thin wire is twisted instead of using a normal single wire. Moreover, the use of a stranded wire such as a litz wire can reduce the effect of the skin effect. Further, instead of a material having a circular cross section such as a general copper wire, a material having a rectangular cross section such as a copper foil can be used for the winding. Other configurations and operations are the same as those of the first embodiment.
【００３１】上述した構成例では、コア３をＥ型コア３
ａの組み合わせとしているが、図５に示すように、全体
としてロ字型をなすように２個のＵ型コア３ｃ，３ｄの
組み合わせとするなど他の形式のコア３を用いてもよ
い。この場合は、各Ｕ型コア３ｃ，３ｄの一方の脚片の
突き合わせ部分付近に１次巻線ｎ１を巻装し、他方の脚
片の突き合わせ部分に２次巻線ｎ２を巻装する。In the configuration example described above, the core 3 is
Although the combination is a, as shown in FIG. 5, another type of core 3 may be used such as a combination of two U-shaped cores 3c and 3d so as to form a rectangular shape as a whole. In this case, the primary winding n1 is wound around the butting portion of one leg of each of the U-shaped cores 3c and 3d, and the secondary winding n2 is wound around the butting portion of the other leg.
【００３２】（第３の実施の形態）本実施形態は、図６
に示すように、１次巻線ｎ１と２次巻線ｎ２とを各別の
ハウジング５ａ，５ｂに収納したものである。すなわ
ち、第１の実施の形態において用いたコイルボビン１を
分離鍔２ｃの部位で２分割した形状のコイルボビン１
ａ，１ｂを用い、一方のコイルボビン１ａに１次巻線ｎ
１の巻線ｎ１１，ｎ１２を巻装し、他方のコイルボビン
１ｂに２次巻線ｎ２の巻線ｎ２１，ｎ２２を巻装してい
る。１次巻線ｎ１と２次巻線ｎ２との巻装の仕方は第１
の実施の形態と同様であって、各巻線ｎ１１，ｎ１２、
ｎ２１，ｎ２２をそれぞれ並列接続された複数の線路に
分割し、各線路ごとに層を形成するとともに１つの巻線
の層間に他の巻線の層を介在させるようにして多層巻き
とする。また、コア３には２個のＥ型コア３ａを用いて
おり、各Ｅ型コア３ａを各ハウジング５ａ，５ｂにそれ
ぞれ配置してある。つまり、各ハウジング５ａ，５ｂに
それぞれトランスＴの半分ずつを構成するトランス半体
Ｔ１，Ｔ２が収納される。(Third Embodiment) This embodiment is different from FIG.
As shown in FIG. 5, a primary winding n1 and a secondary winding n2 are housed in separate housings 5a and 5b. That is, the coil bobbin 1 used in the first embodiment is divided into two parts at the separation flange 2c.
a, 1b, and a primary winding n is attached to one coil bobbin 1a.
One winding n11 and n12 are wound, and the other coil bobbin 1b is wound with windings n21 and n22 of a secondary winding n2. The method of winding the primary winding n1 and the secondary winding n2 is the first.
And the windings n11, n12,
Each of n21 and n22 is divided into a plurality of lines connected in parallel, a layer is formed for each line, and a multilayer winding is formed by interposing a layer of another winding between layers of one winding. Further, two E-shaped cores 3a are used for the core 3, and each E-shaped core 3a is disposed in each of the housings 5a and 5b. In other words, the transformer halves T1 and T2 that form half of the transformer T are housed in the housings 5a and 5b, respectively.
【００３３】１次巻線ｎ１を巻装したトランス半体Ｔ１
を収納するハウジング５ａには凹所６が形成され、トラ
ンス半体Ｔ１におけるＥ形コア３ａの中央片および両側
片の先端面が凹所６の底面に望むように配置される。ま
た、ハウジング５ｂには２次巻線ｎ２を巻装したトラン
ス半体Ｔ２が収納され、トランス半体Ｔ２の中央片およ
び両側片の先端面をトランス半体Ｔ１の中央片および両
側片に位置合わせしたときに、ハウジング５ｂの一部が
ハウジング５ａに設けた凹所６に嵌合するようにしてあ
る。各Ｅ型コア３ａ，３ｂの先端面において磁路は開放
されており、ハウジング５ｂをハウジング５ａの凹所６
に嵌合させると、各Ｅ型コア３ａ，３ｂにおいて磁路の
開放されている部位同士が突き合わせられる形で両トラ
ンス半体Ｔ１，Ｔ２が対向配置される。したがって、両
トランス半体Ｔ１，Ｔ２がトランス結合されることで、
１次巻線ｎ１から２次巻線ｎ２への電力の伝達が可能に
なる。Transformer half T1 wound with primary winding n1
A recess 6 is formed in the housing 5a that accommodates the E-shaped core 3a of the transformer half T1. The housing 5b houses a transformer half T2 around which the secondary winding n2 is wound, and aligns the tip surfaces of the center piece and both side pieces of the transformer half T2 with the center piece and both side pieces of the transformer half T1. Then, a part of the housing 5b is fitted into the recess 6 provided in the housing 5a. The magnetic paths are open at the end surfaces of the E-shaped cores 3a and 3b, and the housing 5b is connected to the recess 6 of the housing 5a.
When the two transformer halves T1 and T2 are opposed to each other, the portions of the E-shaped cores 3a and 3b whose magnetic paths are open are abutted against each other. Therefore, both trans-halfs T1 and T2 are trans-coupled,
Power can be transmitted from the primary winding n1 to the secondary winding n2.
【００３４】上述の構成によれば、各トランス半体Ｔ
１，Ｔ２をハウジング５ａ，５ｂの外部に露出させるこ
となく、両ハウジング５ａ，５ｂ間での電力の伝達が可
能になるから、ハウジング５ａ，５ｂを密封しながらも
ハウジング５ａからハウジング５ｂへの電力供給が可能
になり、浴室や屋外のような防水性や防塵性が要求され
る環境での電力の供給に適したものになる。他の構成お
よび動作は第１の実施の形態と同様である。According to the above configuration, each transformer half T
Since power can be transmitted between the housings 5a and 5b without exposing the T1 and T2 to the outside of the housings 5a and 5b, the power from the housing 5a to the housing 5b can be obtained while the housings 5a and 5b are sealed. This makes it possible to supply power, which is suitable for supplying power in an environment where waterproofness and dustproofness are required, such as a bathroom or outdoors. Other configurations and operations are the same as those of the first embodiment.
【００３５】（第４の実施の形態）本実施形態は、漏れ
インダクタンスを小さくするものであり、図７に示すよ
うに、コイルボビン１として図１８（ｂ）に示したもの
と同様に、長手方向の両端に鍔部２ａ，２ｂを備えると
ともに、長手方向の中間部に２つの分離鍔２ｄ，２ｅを
形成することによって、巻線を巻装する領域を３つ設け
たものを用いる。中央の領域には１次巻線ｎ１の各巻線
ｎ１１，ｎ１２を交互に層にして多層巻きに巻装し、両
側の領域にはそれぞれ２次巻線ｎ２の各巻線ｎ２１，ｎ
２２をそれぞれ巻装してある。この構成では、１次巻線
ｎ１の両側に２次巻線ｎ２を配置していることによっ
て、１次巻線ｎ１で生じる磁束の大部分が２次巻線ｎ２
を通ることになり、第１の実施の形態の構成に比較する
と漏れ磁束は低減する。他の構成および動作は第１の実
施の形態と同様である。(Fourth Embodiment) In this embodiment, the leakage inductance is reduced. As shown in FIG. 7, the coil bobbin 1 has a longitudinal direction similar to that shown in FIG. Are provided with flanges 2a and 2b at both ends thereof, and two separation flanges 2d and 2e are formed in the middle part in the longitudinal direction to provide three regions for winding the winding. In the central region, the windings n11 and n12 of the primary winding n1 are alternately layered and wound in a multilayer winding, and in the regions on both sides, the windings n21 and n of the secondary winding n2 are respectively provided.
22, respectively. In this configuration, by arranging the secondary winding n2 on both sides of the primary winding n1, most of the magnetic flux generated in the primary winding n1 is transferred to the secondary winding n2.
And the leakage magnetic flux is reduced as compared with the configuration of the first embodiment. Other configurations and operations are the same as those of the first embodiment.
【００３６】（第５の実施の形態）図８に示す実施形態
は、第１の実施形態のものにおける巻線ｎ１１，ｎ１２
の巻き付けについて詳しく示したものであり、一方の巻
線ｎ１１の一方の線路を密着巻きで１層分巻装した後に
巻線ｎ１１の外周に絶縁テープ４を巻き、絶縁テープ４
の外側に他方の巻線ｎ１２の一方の線路を逆巻きで巻装
する。さらに、巻線ｎ１２の外側に絶縁テープ４を巻
き、絶縁テープ４の外側に上記一方の巻線ｎ１１の他方
の線路を巻装する。この上に絶縁テープ４を巻いた後、
さらに他方の巻線ｎ１２の他方の線路を逆巻きで巻き、
その上に絶縁テープ４を巻く。そして、コイルボビン１
の一端側に位置する都合４つの端部を半田付けで相互に
接続した端部ロをセンタタップとし、コイルボビン４の
他端側に位置する都合４つの端部のうち、巻線ｎ１１で
ある２つの端部と巻線ｎ１２である２つの端部を夫々半
田付けで接続し、端点イ，ハを形成する。なお、各巻線
ｎ１１，ｎ１２の各線路は１本の導線を用いて折り返す
ようにして巻くようにしてもよい。(Fifth Embodiment) The embodiment shown in FIG. 8 is the same as the windings n11 and n12 in the first embodiment.
In detail, winding one line of one winding n11 is wound in close contact winding by one layer, and then an insulating tape 4 is wound around the outer periphery of the winding n11.
, One line of the other winding n12 is wound in reverse winding. Further, the insulating tape 4 is wound around the outside of the winding n12, and the other line of the one winding n11 is wound around the outside of the insulating tape 4. After wrapping the insulating tape 4 on this,
Further, the other line of the other winding n12 is wound in reverse winding,
An insulating tape 4 is wound thereon. And coil bobbin 1
The four ends located at one end of the coil bobbin 4 are connected to each other by soldering as a center tap. Of the four ends located at the other end of the coil bobbin 4, the winding n11 is 2 The two ends, which are the winding n12, are connected to each other by soldering to form end points a and c. Note that each line of each of the windings n11 and n12 may be wound so as to be folded back using one conductor.
【００３７】いずれにしても、各巻線ｎ１１，ｎ１２の
各線路のコイルボビン１に対する巻き始め位置を同じと
することで、端点イ、ハ及びセンタタップとなる端部ロ
はコイルボビン１の周方向における同一位置に位置させ
ることができる。In any case, by setting the winding start positions of the respective windings n11 and n12 with respect to the coil bobbin 1 to the same line, the end points a and c and the end b serving as the center tap are the same in the circumferential direction of the coil bobbin 1. Position.
【００３８】２次巻線ｎ２１，２２も同様に図９に示す
ように巻き始め位置を同じとして総計４層を順次巻装
し、端点ニ、ヘ及びセンタタップとなる端部ホを形成す
る。１次巻線ｎ１１の巻き始め位置及び２次巻線ｎ１２
の巻き始め位置を揃えることで、上記イ〜ヘを同じ位置
とすることができる。Similarly, as shown in FIG. 9, the secondary windings n21 and n22 are wound at the same winding start position and a total of four layers are sequentially wound to form end portions d and f and an end portion e serving as a center tap. Winding start position of primary winding n11 and secondary winding n12
Can be set to the same position by aligning the winding start positions.
【００３９】センタタップとなる端部ロ、ホの少なくと
も一方を、図１０に示すように、コイルボビン１の中央
側に位置させてもよい。At least one of the ends B and E serving as the center tap may be located at the center of the coil bobbin 1 as shown in FIG.
【００４０】図１１に示すように、プリント板への取付
用のピン７０を備えた台座７がコイルボビン１に連結さ
れる場合は、各端点及びセンタタップは上記ピン７０に
接続すればよい。As shown in FIG. 11, when the pedestal 7 having the pins 70 for attaching to the printed board is connected to the coil bobbin 1, each end point and the center tap may be connected to the pins 70.
【００４１】いわゆるサンドイッチ巻きとしない場合に
おいても、図１２に示すように、巻き始めを同じとして
一方の巻線ｎ１１（またはｎ２１）と他方の巻線ｎ１２
（またはｎ２２）を順次巻いて、一端側に端点イ、ハ
（またはニ、ヘ）、他端側にセンタタップとなる端部ロ
（またはホ）を形成すればよい。Even when not so-called sandwich winding, as shown in FIG. 12, one winding n11 (or n21) and the other winding n12 are assumed to have the same winding start.
(Or n22) may be sequentially wound to form end points A and C (or D and F) at one end and an end B (or E) serving as a center tap at the other end.
【００４２】（第６の実施の形態）本実施形態では、図
１３に示すように、センタタップとなる端部ロを最終的
にコイルボビン１の外周を通して端点イ、ハが位置する
側に配置している。(Sixth Embodiment) In the present embodiment, as shown in FIG. 13, an end b serving as a center tap is finally arranged on the side where the end points A and C are located through the outer periphery of the coil bobbin 1. ing.
【００４３】図１４に示すように、各層毎に端点をコイ
ルボビン１の一端側に引き出すようにしてもよい。ただ
し、この場合は絶縁テープ４を巻かなくてはならない回
数が増えるために、コンパクト化の点では図１３に示す
ようにした方が好ましい。As shown in FIG. 14, an end point may be drawn out to one end side of the coil bobbin 1 for each layer. However, in this case, since the number of times that the insulating tape 4 must be wound increases, it is preferable to make the insulating tape 4 as shown in FIG. 13 in terms of compactness.
【００４４】（第７の実施の形態）図１５及び図１６に
示すように、１次巻線ｎ１１，ｎ１２のコイルボビン１
と２次巻線ｎ２１，ｎ２２のコイルボビン１とを別体と
している場合は、各巻線を簡単に巻くことができ、ま
た、台座７に両コイルボビン１，１を連結することで一
体化したり、第３の実施形態に示したもののようにする
こともできる。(Seventh Embodiment) As shown in FIGS. 15 and 16, the coil bobbin 1 of the primary windings n11 and n12 is
When the coil bobbins 1 of the secondary windings n21 and n22 are separate from each other, the respective windings can be easily wound, and the coil bobbins 1 and 1 can be integrated by connecting the coil bobbins 1 and 1 to the base 7. It can also be as shown in the third embodiment.
【００４５】[0045]
【発明の効果】請求項１の発明は、コアの異なる部位に
巻装された１次巻線と２次巻線との少なくとも一方がセ
ンタタップと各一端との間の２つの巻線からなるトラン
スであって、前記２つの巻線が、並列接続された複数本
の線路からなり、各線路が１つの層となるとともに、各
巻線の層が交互に重なるようにコイルボビンに巻装され
ているものであり、一方の巻線を形成する２つの層間に
他方の巻線を形成する層が挿入されるから、１つの巻線
における層間の近接効果が抑制されることによって損失
が低減することになる。すなわち、トランスでの損失が
少なくなり、巻線による発熱が低減してトランスの小型
化が可能になる。According to the first aspect of the present invention, at least one of the primary winding and the secondary winding wound around different portions of the core comprises two windings between the center tap and each end. A transformer, wherein the two windings are composed of a plurality of lines connected in parallel, each line being one layer, and wound around a coil bobbin such that the layers of each winding are alternately overlapped. Since the layer forming the other winding is inserted between the two layers forming the one winding, the loss is reduced by suppressing the proximity effect between the layers in one winding. Become. That is, the loss in the transformer is reduced, the heat generated by the winding is reduced, and the size of the transformer can be reduced.
【００４６】請求項２の発明は、請求項１の発明におい
て、前記１次巻線のみにおいて２つの巻線の層が交互に
重なるようにコイルボビンに巻装されているものであ
り、２次巻線については従来と同様の巻き方を採用する
ことで、１次巻線での近接効果によって生じる損失を低
減しながらも、２次巻線については従来の技術を適用す
ることができるから、巻装作業が比較的簡単であって、
所要の効果を得ながらもコスト増を抑制することができ
る。According to a second aspect of the present invention, in the first aspect of the present invention, only the primary winding is wound around a coil bobbin so that two winding layers are alternately overlapped with each other. By adopting the same winding method as in the past for the wire, the conventional technology can be applied to the secondary winding while reducing the loss caused by the proximity effect in the primary winding. Mounting work is relatively easy,
It is possible to suppress the increase in cost while obtaining the required effect.
【００４７】請求項３の発明は、請求項１の発明におい
て、前記１次巻線と前記２次巻線との両方がセンタタッ
プを有し、それぞれの２つの巻線の層が交互に重なるよ
うにコイルボビンに巻装されているものであり、１次巻
線と２次巻線との両方について近接効果による損失を低
減することができるから、トランスでの損失が少なくな
り、巻線による発熱が一層低減してトランスの小型化に
つながる。According to a third aspect of the present invention, in the first aspect of the present invention, both the primary winding and the secondary winding have center taps, and the two winding layers alternately overlap. As described above, since the loss due to the proximity effect can be reduced for both the primary winding and the secondary winding, the loss in the transformer is reduced, and the heat generated by the winding is reduced. Is further reduced, which leads to downsizing of the transformer.
【００４８】請求項４の発明は、請求項２の発明におい
て、前記１次巻線と前記２次巻線との両方がセンタタッ
プを有し、２次巻線における２つの巻線が１次巻線を両
側から挟む形で配置されているものであり、１次巻線と
２次巻線との結合度が高くなり漏れ磁束が少なくなって
トランスでの損失を一層低減することができる。According to a fourth aspect of the present invention, in the second aspect, both the primary winding and the secondary winding have a center tap, and two windings of the secondary winding are primary windings. The windings are arranged so as to sandwich the windings from both sides. The degree of coupling between the primary winding and the secondary winding is increased, the leakage flux is reduced, and the loss in the transformer can be further reduced.
【００４９】請求項５の発明は、請求項１ないし請求項
４の発明において、前記コアは２つのＥ型コアを組み合
わせた日字状に形成されているものであり、磁気抵抗の
少ない磁路を形成することができ、損失の一層少ないト
ランスを提供することができる。According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, the core is formed in the shape of a letter combining two E-shaped cores, and the magnetic path has a low magnetic resistance. Can be formed, and a transformer with less loss can be provided.
【００５０】請求項６の発明は、請求項１ないし請求項
３の発明において、前記１次巻線を磁路の一部が開放さ
れた第１のコアに巻装した第１のトランス半体と、前記
２次巻線を磁路の一部が開放された第２のコアに巻装し
た第２のトランス半体とを備え、第１および第２のコア
において磁路の開放されている部位同士を突き合わせる
形で第１および第２のトランス半体を分離可能に対向配
置するものであり、端子を設けることなく無接点で電力
を伝達することができるから、端子の腐食による故障が
発生せず、防水性や防塵性を要求される環境での使用に
適したものになる。According to a sixth aspect of the present invention, in the first to third aspects of the present invention, the first transformer half has the primary winding wound on a first core having a part of a magnetic path opened. And a second transformer half in which the secondary winding is wound around a second core having a part of a magnetic path opened, and the magnetic path is opened in the first and second cores. The first and second transformer halves are disposed so as to be separated from each other so that the parts are abutted with each other. Power can be transmitted in a contactless manner without providing a terminal. It does not occur and is suitable for use in an environment where waterproofness and dustproofness are required.
【００５１】請求項７の発明は、請求項１ないし請求項
６の発明において、少なくとも１つの層は撚り線を巻装
して形成されているものであり、近接効果が少ないのは
もちろんのこと、高周波で使用する際の表皮効果の影響
も低減できるから、高周波での損失の少ないトランスを
提供することができる。According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, at least one layer is formed by winding a stranded wire, and it is needless to say that the proximity effect is small. In addition, since the effect of the skin effect when used at high frequencies can be reduced, a transformer with low loss at high frequencies can be provided.
【００５２】請求項８の発明は、請求項１ないし請求項
７の発明において、前記コイルボビンにおいて各巻線を
巻装する領域がそれぞれ仕切られ、各巻線を巻装する領
域を埋めて隙間を形成しないように各層が巻装されてい
るものであり、各層が隙間なく巻装されていることによ
って、磁束の漏れが少なくなり、漏れ磁束による損失を
低減することができる。According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, a region where each winding is wound on the coil bobbin is partitioned, and no gap is formed by filling the region where each winding is wound. As described above, each layer is wound, and since each layer is wound without a gap, leakage of magnetic flux is reduced and loss due to leakage magnetic flux can be reduced.
【００５３】請求項９の発明は、コアの異なる部位に巻
装された１次巻線と２次巻線との少なくとも一方がセン
タタップと各一端との間の２つの巻線からなるトランス
であって、上記２つの巻線はそのセンタタップ側の各端
部がコイルボビンの一方側に、センタタップ側でない端
部をコイルボビンの他方側に位置して２つの巻線のセン
タタップ側の端部がセンタタップに接続されているもの
であり、センタタップ接続させる巻線の端点をコイルボ
ビンの一方側に集めるために、センタタップ配線を短く
することができ、トランス巻線の体積密度をあげるとと
もにノイズを低減させることができる。According to a ninth aspect of the present invention, there is provided a transformer in which at least one of a primary winding and a secondary winding wound around different portions of a core includes two windings between a center tap and each end. The two windings each have a center tap side end located on one side of the coil bobbin, and an end other than the center tap side located on the other side of the coil bobbin. Is connected to the center tap, and the center tap wiring can be shortened to collect the end points of the winding to be connected to the center tap on one side of the coil bobbin, increasing the volume density of the transformer winding and reducing noise. Can be reduced.
【００５４】請求項１０の発明は、請求項９の発明にお
いて、２つの巻線のコイルボビンに対する巻き始め位置
が同じとなっているものであり、巻線を巻く時の位置調
整が簡単になる上に、回路への接続のための配線を短く
することができ、トランス巻線の体積密度をあげるとと
もに特性を向上させることができ、ノイズを低減させる
ことができる。According to a tenth aspect of the present invention, in the ninth aspect of the invention, the winding start positions of the two windings with respect to the coil bobbin are the same, so that the position adjustment when winding the windings is simplified. In addition, the wiring for connection to the circuit can be shortened, the volume density of the transformer winding can be increased, the characteristics can be improved, and noise can be reduced.
【００５５】請求項１１の発明は、請求項９または請求
項１０の発明において、次巻線用のコイルボビンと２次
巻線用のコイルボビンとが独立しているとともに、これ
らコイルボビンは外部接続用ピンを備えた台座に連結さ
れて上記ピンに巻線が接続されているものであり、プリ
ント板への取付を容易にすることができる。According to an eleventh aspect of the present invention, in the ninth or tenth aspect of the present invention, the coil bobbin for the secondary winding and the coil bobbin for the secondary winding are independent, and these coil bobbins are connected to external connection pins. The windings are connected to the pins by being connected to a pedestal provided with the above, so that attachment to a printed board can be facilitated.
【００５６】請求項１２の発明は、コアの異なる部位に
巻装された１次巻線と２次巻線との少なくとも一方がセ
ンタタップと各一端との間の２つの巻線からなるととも
にこれら２つの巻線が、並列接続された複数本の線路か
らなるトランスの製造方法であり、第１の巻線の第１の
線路をコイルボビンに巻き、ついで第１の巻線の第１の
線路の外周に第２の巻線の第１の線路を逆巻きで巻き、
この後、第２の巻線の第１の線路の外周に第１の巻線の
第２の線路を巻き、さらに第１の巻線の第２の線路の外
周に第２の巻線の第２の線路を巻いて、上記４つの線路
のコイルボビンの一方側に位置する各端部をセンタタッ
プに接続し、コイルボビンの他方側に位置する第１の巻
線の２つの線路の各端部と第２の巻線の２つの線路の各
端部とを夫々相互に接続するものであり、いわゆるサン
ドイッチ巻きとした請求項１の発明にかかるものを容易
に製造することができる。According to a twelfth aspect of the present invention, at least one of the primary winding and the secondary winding wound around different portions of the core comprises two windings between the center tap and each end. A method for manufacturing a transformer in which two windings are composed of a plurality of lines connected in parallel, wherein a first line of a first winding is wound around a coil bobbin, and then a first line of the first winding is wound. A first line of a second winding is wound around the outer periphery in a reverse winding,
Thereafter, the second line of the first winding is wound around the outer periphery of the first line of the second winding, and the second line of the second winding is wound around the outer periphery of the second line of the first winding. And two ends of one of the four lines, which are located on one side of the coil bobbin, are connected to a center tap, and the other ends of the two lines of the first winding, which are located on the other side of the coil bobbin, are connected to each other. The two ends of the two lines of the second winding are connected to each other, and a so-called sandwich winding according to the invention of claim 1 can be easily manufactured.
【００５７】請求項１３の発明は、請求項１２の発明に
おいて、巻線の各端部はコイルボビンに設けたプリント
板取付用のピンに接続するものであり、請求項１１に係
るものを容易に製造することができる。According to a thirteenth aspect of the present invention, in the twelfth aspect, each end of the winding is connected to a pin for mounting a printed board provided on a coil bobbin. Can be manufactured.
【００５８】請求項１４の発明は、各巻線の各線路をコ
イルボビンに対して同一位置から巻き始めるものであ
り、請求項１及び請求項１０の発明に係るものを容易に
製造することができる。According to a fourteenth aspect of the present invention, each line of each winding starts to be wound around the coil bobbin from the same position, and the one according to the first and tenth aspects can be easily manufactured.
【図１】本発明の第１の実施の形態を示す断面図であ
る。FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.
【図２】同上の要部断面図である。FIG. 2 is a sectional view of a main part of the above.
【図３】同上における巻線の巻装例を示す図である。FIG. 3 is a diagram showing a winding example of the winding in the above.
【図４】本発明の第２の実施の形態における巻線の巻装
例を示す図である。FIG. 4 is a diagram illustrating a winding example of a winding according to a second embodiment of the present invention.
【図５】本発明に他の構成例を示す概略構成図である。FIG. 5 is a schematic configuration diagram showing another configuration example according to the present invention.
【図６】本発明の第３の実施の形態を示す断面図であ
る。FIG. 6 is a sectional view showing a third embodiment of the present invention.
【図７】本発明の第４の実施の形態を示す概略断面図で
ある。FIG. 7 is a schematic sectional view showing a fourth embodiment of the present invention.
【図８】本発明の第５の実施の形態における製造手順を
示す説明図である。FIG. 8 is an explanatory diagram showing a manufacturing procedure according to a fifth embodiment of the present invention.
【図９】同上の製造手順を示す説明図である。FIG. 9 is an explanatory view showing a manufacturing procedure of the above.
【図１０】同上の他例を示す概略構成図である。FIG. 10 is a schematic configuration diagram showing another example of the above.
【図１１】同上のさらに他例を示す概略構成図である。FIG. 11 is a schematic configuration diagram showing still another example of the above.
【図１２】同上の別の例の製造手順を示す説明図であ
る。FIG. 12 is an explanatory view showing a manufacturing procedure of another example of the above.
【図１３】本発明の第６の実施の形態における製造手順
を示す説明図である。FIG. 13 is an explanatory diagram showing a manufacturing procedure according to a sixth embodiment of the present invention.
【図１４】同上の他例の製造手順を示す説明図である。FIG. 14 is an explanatory view showing a manufacturing procedure of another example of the above.
【図１５】本発明の第７の実施の形態を示す概略構成図
である。FIG. 15 is a schematic configuration diagram showing a seventh embodiment of the present invention.
【図１６】（ａ）は同上のコイルボビンと台座の側面
図、（ｂ）は同上の水平断面図、（ｃ）は側面図であ
る。16A is a side view of the same coil bobbin and pedestal, FIG. 16B is a horizontal sectional view of the same, and FIG. 16C is a side view.
【図１７】トランスを用いたスイッチング電源の一例を
示す回路図である。FIG. 17 is a circuit diagram showing an example of a switching power supply using a transformer.
【図１８】従来のトランスの構成例を示す断面図であ
る。FIG. 18 is a cross-sectional view illustrating a configuration example of a conventional transformer.
１ コイルボビン ２ａ，２ｂ 鍔部 ２ｃ〜２ｅ 分離鍔 ３ コア ３ａ，３ｂ Ｅ型コア ｎ１ １次巻線 ｎ２ ２次巻線 ｎ１１，ｎ１２ 巻線 ｎ２１，ｎ２２ 巻線 Ｔ トランス Ｔ１，Ｔ２ トランス半体 DESCRIPTION OF SYMBOLS 1 Coil bobbin 2a, 2b Flange part 2c-2e Separation flange 3 Core 3a, 3b E type core n1 Primary winding n2 Secondary winding n11, n12 winding n21, n22 winding T transformer T1, T2 Transformer half
───────────────────────────────────────────────────── フロントページの続き (72)発明者 有村 直 大阪府門真市大字門真1048番地松下電工株 式会社内 Ｆターム(参考） 5E043 BA01 BA03 5E062 FF01 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Nao Arimura 1048 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd. F-term (reference) 5E043 BA01 BA03 5E062 FF01
Claims (14)
と２次巻線との少なくとも一方がセンタタップと各一端
との間の２つの巻線からなるトランスであって、前記２
つの巻線が、並列接続された複数本の線路からなり、各
線路が１つの層となるとともに、各巻線の層が交互に重
なるようにコイルボビンに巻装されていることを特徴と
するトランス。1. A transformer comprising at least one of a primary winding and a secondary winding wound around different portions of a core, the transformer comprising two windings between a center tap and one end thereof.
A transformer characterized in that one winding comprises a plurality of lines connected in parallel, each line forms one layer, and is wound around a coil bobbin such that the layers of each winding alternately overlap.
層が交互に重なるようにコイルボビンに巻装されている
ことを特徴とする請求項１記載のトランス。2. The transformer according to claim 1, wherein only the primary winding is wound around a coil bobbin such that layers of two windings are alternately overlapped.
センタタップを有し、それぞれの２つの巻線の層が交互
に重なるようにコイルボビンに巻装されていることを特
徴とする請求項１記載のトランス。3. The primary winding and the secondary winding both have center taps, and are wound around a coil bobbin such that the two winding layers alternately overlap. The transformer according to claim 1, wherein
センタタップを有し、２次巻線における２つの巻線が１
次巻線を両側から挟む形で配置されていることを特徴と
する請求項２記載のトランス。4. Both the primary winding and the secondary winding have a center tap, and two windings in the secondary winding are 1
3. The transformer according to claim 2, wherein the secondary winding is arranged so as to sandwich the secondary winding from both sides.
た日字状に形成されていることを特徴とする請求項１な
いし請求項４のいずれかに記載のトランス。5. The transformer according to claim 1, wherein the core is formed in the shape of a letter combining two E-shaped cores.
第１のコアに巻装した第１のトランス半体と、前記２次
巻線を磁路の一部が開放された第２のコアに巻装した第
２のトランス半体とを備え、第１および第２のコアにお
いて磁路の開放されている部位同士を突き合わせる形で
第１および第２のトランス半体を分離可能に対向配置す
ることを特徴とする請求項１ないし請求項３のいずれか
に記載のトランス。6. A first transformer half in which the primary winding is wound around a first core having a part of a magnetic path opened, and a part of the secondary winding having a part opened in a magnetic path. And a second transformer half wound around the second core, and the first and second transformer halves are joined in such a manner that portions of the first and second cores whose magnetic paths are open are abutted with each other. The transformer according to any one of claims 1 to 3, wherein the transformers are arranged so as to be separable.
形成されていることを特徴とする請求項１ないし請求項
６のいずれかに記載のトランス。7. The transformer according to claim 1, wherein at least one layer is formed by winding a stranded wire.
する領域がそれぞれ仕切られ、各巻線を巻装する領域を
埋めて隙間を形成しないように各層が巻装されているこ
とを特徴とする請求項１ないし請求項７のいずれかに記
載のトランス。8. The coil bobbin according to claim 1, wherein a region where each winding is wound is partitioned, and each layer is wound so as to fill the region where each winding is wound so as not to form a gap. The transformer according to any one of claims 1 to 7.
と２次巻線との少なくとも一方がセンタタップと各一端
との間の２つの巻線からなるトランスであって、上記２
つの巻線はそのセンタタップ側の各端部がコイルボビン
の一方側に、センタタップ側でない端部をコイルボビン
の他方側に位置して２つの巻線のセンタタップ側の端部
がセンタタップに接続されていることを特徴とするトラ
ンス。9. A transformer comprising at least one of a primary winding and a secondary winding wound around different portions of a core, the transformer comprising two windings between a center tap and each end.
One end of the two windings on the center tap side is located on one side of the coil bobbin, and the other end is located on the other side of the coil bobbin, and the ends of the two windings on the center tap side are connected to the center tap. A transformer characterized by being performed.
き始め位置が同じとなっていることを特徴とする請求項
９記載のトランス。10. The transformer according to claim 9, wherein the winding start positions of the two windings with respect to the coil bobbin are the same.
用のコイルボビンとが独立しているとともに、これらコ
イルボビンは外部接続用ピンを備えた台座に連結されて
上記ピンに巻線が接続されていることを特徴とする請求
項９または１０記載のトランス。11. A coil bobbin for a primary winding and a coil bobbin for a secondary winding are independent of each other, and these coil bobbins are connected to a pedestal having pins for external connection so that windings are connected to the pins. The transformer according to claim 9, wherein the transformer is provided.
線と２次巻線との少なくとも一方がセンタタップと各一
端との間の２つの巻線からなるとともにこれら２つの巻
線が、並列接続された複数本の線路からなるトランスの
製造方法であって、第１の巻線の第１の線路をコイルボ
ビンに巻き、ついで第１の巻線の第１の線路の外周に第
２の巻線の第１の線路を逆巻きで巻き、この後、第２の
巻線の第１の線路の外周に第１の巻線の第２の線路を巻
き、さらに第１の巻線の第２の線路の外周に第２の巻線
の第２の線路を巻いて、上記４つの線路のコイルボビン
の一方側に位置する各端部をセンタタップに接続し、コ
イルボビンの他方側に位置する第１の巻線の２つの線路
の各端部と第２の巻線の２つの線路の各端部とを夫々相
互に接続することを特徴とするトランスの製造方法。12. At least one of a primary winding and a secondary winding wound around different portions of a core comprises two windings between a center tap and each end, and these two windings are provided. A method of manufacturing a transformer including a plurality of lines connected in parallel, wherein a first line of a first winding is wound around a coil bobbin, and a second line is formed around an outer periphery of the first line of the first winding. The first line of the first winding is wound in reverse winding, after which the second line of the first winding is wound around the outer periphery of the first line of the second winding, and the first line of the first winding is further wound. The second line of the second winding is wound around the outer periphery of the second line, each end of the four lines located on one side of the coil bobbin is connected to the center tap, and the second line located on the other side of the coil bobbin is connected to the center tap. Connecting each end of the two lines of the first winding and each end of the two lines of the second winding to each other; Characteristic method of manufacturing transformer.
プリント板取付用のピンに接続することを特徴とする請
求項１２記載のトランスの製造方法。13. The method according to claim 12, wherein each end of the winding is connected to a pin for mounting a printed board provided on the coil bobbin.
て同一位置から巻き始めることを特徴とする請求項１２
または１３記載のトランスの製造方法。14. The winding of each line of each winding is started from the same position with respect to the coil bobbin.
Or a method for producing a transformer according to item 13.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000054568A JP3829572B2 (en) | 1999-12-15 | 2000-02-29 | Transformer and manufacturing method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35654899 | 1999-12-15 | ||
| JP11-356548 | 1999-12-15 | ||
| JP2000054568A JP3829572B2 (en) | 1999-12-15 | 2000-02-29 | Transformer and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001237126A true JP2001237126A (en) | 2001-08-31 |
| JP3829572B2 JP3829572B2 (en) | 2006-10-04 |
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ID=26580454
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000054568A Expired - Lifetime JP3829572B2 (en) | 1999-12-15 | 2000-02-29 | Transformer and manufacturing method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP3829572B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031425A (en) * | 2001-07-11 | 2003-01-31 | Matsushita Electric Ind Co Ltd | Transformer assembly |
| JP2004087659A (en) * | 2002-08-26 | 2004-03-18 | Sumida Technologies Inc | High voltage transformer |
| EP1475809A2 (en) * | 2003-05-09 | 2004-11-10 | Canon Kabushiki Kaisha | Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| US7295095B2 (en) | 2003-05-09 | 2007-11-13 | Canon Kabushiki Kaisha | Electric component and method of producing the same |
| JP2008166624A (en) * | 2006-12-29 | 2008-07-17 | Matsushita Electric Works Ltd | Transformer and resonance type switching power supply using the same |
| US20100214810A1 (en) * | 2009-02-23 | 2010-08-26 | Funai Electric Co., Ltd. | Push-Pull Inverter |
| JP2016192489A (en) * | 2015-03-31 | 2016-11-10 | Tdk株式会社 | Coil device and manufacturing method for coil device |
| JP2019091829A (en) * | 2017-11-15 | 2019-06-13 | オムロン株式会社 | Transformer and DC-DC converter |
| KR102228373B1 (en) * | 2020-11-02 | 2021-03-16 | 제룡전기 주식회사 | Single phasw eight windimg transformer and winding arrangement method thereof |
| US10984945B2 (en) | 2015-10-05 | 2021-04-20 | Omron Corporation | Transformer and resonant circuit having same |
| US11923122B2 (en) | 2019-12-18 | 2024-03-05 | Solaredge Technologies Ltd. | Inverter apparatus |
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2000
- 2000-02-29 JP JP2000054568A patent/JP3829572B2/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003031425A (en) * | 2001-07-11 | 2003-01-31 | Matsushita Electric Ind Co Ltd | Transformer assembly |
| JP2004087659A (en) * | 2002-08-26 | 2004-03-18 | Sumida Technologies Inc | High voltage transformer |
| EP1475809A2 (en) * | 2003-05-09 | 2004-11-10 | Canon Kabushiki Kaisha | Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| EP1475809A3 (en) * | 2003-05-09 | 2005-04-20 | Canon Kabushiki Kaisha | Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| US7078997B2 (en) | 2003-05-09 | 2006-07-18 | Canon Kabushiki Kaisha | Transformer assembly, and power conversion apparatus and solar power generation apparatus using the same |
| US7295095B2 (en) | 2003-05-09 | 2007-11-13 | Canon Kabushiki Kaisha | Electric component and method of producing the same |
| JP2008166624A (en) * | 2006-12-29 | 2008-07-17 | Matsushita Electric Works Ltd | Transformer and resonance type switching power supply using the same |
| US20100214810A1 (en) * | 2009-02-23 | 2010-08-26 | Funai Electric Co., Ltd. | Push-Pull Inverter |
| JP2016192489A (en) * | 2015-03-31 | 2016-11-10 | Tdk株式会社 | Coil device and manufacturing method for coil device |
| US10984945B2 (en) | 2015-10-05 | 2021-04-20 | Omron Corporation | Transformer and resonant circuit having same |
| JP2019091829A (en) * | 2017-11-15 | 2019-06-13 | オムロン株式会社 | Transformer and DC-DC converter |
| JP7082267B2 (en) | 2017-11-15 | 2022-06-08 | オムロン株式会社 | Transformers and DC-DC converters |
| US11923122B2 (en) | 2019-12-18 | 2024-03-05 | Solaredge Technologies Ltd. | Inverter apparatus |
| KR102228373B1 (en) * | 2020-11-02 | 2021-03-16 | 제룡전기 주식회사 | Single phasw eight windimg transformer and winding arrangement method thereof |
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