JP6259277B2 - Scott connection transformer iron core and Scott connection transformer - Google Patents
Scott connection transformer iron core and Scott connection transformer Download PDFInfo
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- JP6259277B2 JP6259277B2 JP2013263904A JP2013263904A JP6259277B2 JP 6259277 B2 JP6259277 B2 JP 6259277B2 JP 2013263904 A JP2013263904 A JP 2013263904A JP 2013263904 A JP2013263904 A JP 2013263904A JP 6259277 B2 JP6259277 B2 JP 6259277B2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 134
- 238000004804 winding Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 description 20
- 238000005452 bending Methods 0.000 description 11
- 230000009466 transformation Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Description
本発明は、主座変圧器及びＴ座変圧器からなるスコット結線変圧器及び当該スコット結線変圧器に用いられる鉄心に関するものである。 The present invention relates to a Scott connection transformer including a main transformer and a T seat transformer, and an iron core used in the Scott connection transformer.
スコット結線変圧器に用いられる鉄心としては、特許文献１に示すように、コイルが巻回された主座脚鉄心及びＴ座脚鉄心と、主座脚鉄心及びＴ座脚鉄心の間に配置される中央脚鉄心とを有する三脚鉄心がある。このような三脚鉄心は、図７に示すように、主座脚鉄心、Ｔ座脚鉄心及び中央脚鉄心が平面視において一直線に並ぶように配置されている。 As shown in Patent Document 1, the iron core used for the Scott connection transformer is disposed between the main seat leg core and the T seat leg core around which the coil is wound, and the main seat leg core and the T seat leg core. There is a tripod iron core with a central leg iron core. As shown in FIG. 7, such a tripod iron core is arranged so that the main seat leg core, the T seat leg iron core, and the center leg iron core are aligned in a plan view.
しかしながら、主座脚鉄心、Ｔ座脚鉄心及び中央脚鉄心が一直線に並ぶように配置された三脚鉄心は、主座脚鉄心及びＴ座脚鉄心の距離Ｄにより三脚鉄心全体の幅寸法が決まってしまう。また、主座脚鉄心及びＴ座脚鉄心に巻回されるコイルの巻数によってスコット結線変圧器の幅寸法も決まってしまう。したがって、主座脚鉄心、Ｔ座脚鉄心及び中央脚鉄心の幅寸法を小さくしなければ、三脚鉄心全体の幅寸法を小さくすることはできず、また、コイルの巻数を減らす等によりコイルの巻回径を小さくしなければ、スコット結線変圧器の幅寸法を小さくすることはできない。その結果、従来のスコット結線変圧器では、省スペース化が難しいという問題がある。 However, the tripod cores arranged so that the main seat leg core, the T seat leg core, and the center leg core are aligned are determined by the distance D between the main seat leg core and the T seat leg core, and the overall width of the tripod core is determined. End up. Moreover, the width dimension of the Scott connection transformer is also determined by the number of turns of the coil wound around the main seat leg core and the T seat leg core. Therefore, the width of the entire tripod core cannot be reduced unless the width dimensions of the main leg core, the T leg core, and the center leg core are reduced, and the coil winding can be reduced by reducing the number of coil turns. The width dimension of the Scott connection transformer cannot be reduced unless the turning diameter is reduced. As a result, there is a problem that it is difficult to save space in the conventional Scott connection transformer.
そこで本発明は、上記問題点を一挙に解決するためになされたものであり、スコット結線変圧器に用いられる鉄心において、各脚鉄心自体の寸法を小さくすること無く、またコイルの巻回径を小さくすること無く、鉄心全体又はスコット結線変圧器の幅方向の寸法を小さくすることをその主たる課題とするものである。 Therefore, the present invention has been made to solve the above problems all at once, and in the iron core used in the Scott connection transformer, the winding diameter of the coil is reduced without reducing the size of each leg iron core itself. The main problem is to reduce the overall dimension of the iron core or the width of the Scott connection transformer without reducing the size.
すなわち本発明に係るスコット変圧器用鉄心は、スコット結線変圧器に用いられる鉄心であって、スコット結線されたコイルが巻回される２つの主脚鉄心と、前記２つの主脚鉄心に生じる磁束の共通の通路になる共通脚鉄心と、前記２つの主脚鉄心及び前記共通脚鉄心の上下それぞれを連結する継鉄心とを備え、前記２つの主脚鉄心及び前記共通脚鉄心が、平面視において三角形の頂点に位置するように配置され、前記継鉄心が、平面視において前記共通脚鉄心を屈折点として折れ曲がっていることを特徴とする。 That is, the iron core for a Scott transformer according to the present invention is an iron core used for a Scott connection transformer, and includes two main leg cores around which a coil connected to the Scott connection is wound, and magnetic flux generated in the two main leg iron cores. A common leg iron core serving as a common passage, and a yoke core connecting the two main leg iron cores and the upper and lower sides of the common leg iron core, and the two main leg iron cores and the common leg iron core are triangular in plan view It is arrange | positioned so that it may be located in the vertex of No., and the said yoke core is bent by making the said common leg iron core into a refraction point in planar view, It is characterized by the above-mentioned.
このようなものであれば、２つの主脚鉄心及び共通脚鉄心が、平面視において三角形の頂点に位置するように配置されるとともに、継鉄心が、平面視において共通脚鉄心を屈曲点として折れ曲がっているので、各脚鉄心自体の寸法を小さくすること無く、２つの主脚鉄心間の距離を小さくすることができ、鉄心全体の幅寸法を小さくし、省スペース化を図ることができる。また、コイルの巻回径を小さくすること無く、スコット結線変圧器の幅寸法を小さくすることができ、省スペース化を図ることができる。 In such a case, the two main leg iron cores and the common leg iron core are arranged so as to be located at the apex of the triangle in plan view, and the yoke core is bent with the common leg iron core as a bending point in plan view. Therefore, the distance between the two main leg iron cores can be reduced without reducing the size of each leg iron core itself, and the width dimension of the entire iron core can be reduced to save space. Moreover, the width dimension of the Scott connection transformer can be reduced without reducing the coil winding diameter, and space saving can be achieved.
前記２つの主脚鉄心の一方及び前記共通脚鉄心の距離と、前記２つの主脚鉄心の他方及び前記共通脚鉄心の距離とが、互いに等しいことが望ましい。
これならば、２つの主脚鉄心の一方及び共通脚鉄心の間の磁路長さと、２つの主脚鉄心の他方及び共通脚鉄心の間の磁路長さとが等しくなるので、２つの主脚鉄心の磁気特性が互いに同等となり、効率良く三相交流電源から２つの単相回路に変換することができる。
It is desirable that the distance between one of the two main leg iron cores and the common leg iron core is equal to the distance between the other of the two main leg iron cores and the common leg iron core.
In this case, the magnetic path length between one of the two main leg iron cores and the common leg iron core is equal to the magnetic path length between the other of the two main leg iron cores and the common leg iron core. The magnetic characteristics of the iron core are equivalent to each other, and the three-phase AC power supply can be efficiently converted into two single-phase circuits.
前記２つの主脚鉄心及び前記共通脚鉄心が、平面視において直角三角形の頂点に位置するように配置され、前記共通脚鉄心が、前記直角三角形の頂点のうち直角である頂点に位置するように配置されることが望ましい。
これならば、２つの主脚鉄心間の距離を小さくして、鉄心全体の幅方向の寸法を小さくし、省スペース化を図ることができる。
The two main leg iron cores and the common leg iron core are arranged so as to be located at the apex of a right triangle in plan view, and the common leg iron core is located at an apex that is a right angle among the apexes of the right triangle. It is desirable to be arranged.
If this is the case, the distance between the two main leg iron cores can be reduced, the dimensions in the width direction of the entire iron core can be reduced, and space can be saved.
前記２つの主脚鉄心の少なくとも一方が、インボリュート形状に湾曲された湾曲部を有する多数の磁性鋼板を放射状に積層して円筒状に形成した円筒状のインボリュート鉄心であることが望ましい。
これならば、断面略円形のインボリュート鉄心は渦電流損が小さいので、前記主脚鉄心自体の発熱を低減することができる。
It is desirable that at least one of the two main leg iron cores is a cylindrical involute iron core formed in a cylindrical shape by laminating a large number of magnetic steel plates each having a curved portion curved in an involute shape.
In this case, since the involute iron core having a substantially circular cross section has a small eddy current loss, heat generation of the main leg iron core itself can be reduced.
前記継鉄心が、変形巻鉄心により構成されていることが望ましい。
これならば、断面略円形の脚鉄心との衝合部を同じ円形にすることが簡単である。
It is desirable that the yoke core is composed of a deformed wound core.
In this case, it is easy to make the abutting portion with the leg iron core having a substantially circular cross section into the same circle.
また本発明に係るスコット結線変圧器用鉄心を用いたスコット結線変圧器が、前記２つの主脚鉄心の少なくとも一方に巻回される１次コイル及び２次コイルが単一のコイルから構成された単巻変圧器であることが望ましい。
このように１次コイル及び２コイルを単巻結線することで、１次コイルと２次コイルとの間の絶縁を簡素にすることができ、製作し易くなるとともに、事故発生のリスクを低減することができる。
A Scott connection transformer using the Scott connection transformer iron core according to the present invention is a single coil in which a primary coil and a secondary coil wound around at least one of the two main leg iron cores are formed of a single coil. A winding transformer is desirable.
In this way, the primary coil and the second coil are connected in a single winding, so that the insulation between the primary coil and the secondary coil can be simplified, making it easier to manufacture and reducing the risk of an accident occurring. be able to.
このように構成した本発明によれば、スコット結線変圧器に用いられる鉄心において、各脚鉄心自体の寸法を小さくすること無く、またコイルの巻回径を小さくすること無く、鉄心全体の幅方向の寸法を小さくすることができる。 According to the present invention configured as described above, in the iron core used in the Scott connection transformer, without reducing the size of each leg iron core itself, and without reducing the winding diameter of the coil, the width direction of the entire iron core The dimension of can be reduced.
以下に本発明に係るスコット結線変圧器の一実施形態について図面を参照して説明する。 An embodiment of a Scott connection transformer according to the present invention will be described below with reference to the drawings.
本実施形態に係るスコット結線変圧器１００は、三相交流電源からの三相交流を２つの単相交流に変換する変圧器であり、主座変圧器２とＴ座変圧器３とからなる。また、主座変圧器２及びＴ座変圧器３は、１次コイル及び２次コイルが単一のコイルから構成された単巻変圧器であり、主座変圧器２の鉄心及びＴ座変圧器３の鉄心は、一体形成されたものである。 The Scott connection transformer 100 according to the present embodiment is a transformer that converts a three-phase alternating current from a three-phase alternating current power source into two single-phase alternating currents, and includes a main transformer 2 and a T-seat transformer 3. The main transformer 2 and the T-seat transformer 3 are single-winding transformers in which the primary coil and the secondary coil are constituted by a single coil. The iron core of the main transformer 2 and the T-seat transformer The iron core 3 is integrally formed.
具体的にスコット結線変圧器１００の鉄心４は、図１に示すように、スコット結線された誘導コイル１１、１２が巻回される主脚鉄心４１、４２と、この主脚鉄心４１、４２に生じる磁束の共通の通路になるとともに、互いの磁束を直接通じなくするための共通脚鉄心４３と、主脚鉄心４１、４２及び共通脚鉄心４３の上下それぞれを連結する継鉄心４４とを有するものである。 Specifically, as shown in FIG. 1, the iron core 4 of the Scott connection transformer 100 includes main leg iron cores 41 and 42 around which the Scott-connected induction coils 11 and 12 are wound, and the main leg iron cores 41 and 42. A common leg iron core 43 for providing a common path for the generated magnetic flux and preventing the mutual magnetic flux from passing directly, and a yoke core 44 for connecting the main leg iron cores 41 and 42 and the upper and lower sides of the common leg iron core 43 respectively. It is.
一方の主脚鉄心４１は、主座変圧器２の１次コイル及び２次コイルである誘導コイル１１が巻回される脚鉄心である。なお、以下において、一方の主脚鉄心４１を主座脚鉄心４１という。また、他方の主脚鉄心４２は、Ｔ座変圧器３の１次コイル及び２次コイルである誘導コイル１２が巻回される脚鉄心である。なお、以下において、他方の主脚鉄心４２をＴ座脚鉄心４２という。 One main leg iron core 41 is a leg iron core around which the primary coil and the induction coil 11 as the secondary coil of the main transformer 2 are wound. In the following, one main leg core 41 is referred to as a main leg core 41. The other main leg iron core 42 is a leg iron core around which the induction coil 12 that is the primary coil and the secondary coil of the T-seat transformer 3 is wound. In the following, the other main leg iron core 42 is referred to as a T seat leg iron core 42.
誘導コイル１１の両端には、三相（Ｕ相、Ｖ相、Ｗ相）のうち二相（例えばＶ相、Ｗ相）が接続される。また、誘導コイル１２の一方の端は、誘導コイル１１の中点に接続され、誘導コイル１２の他方の端は、三相のうち誘導コイル１１に接続されない残りの一相（例えばＵ相）が接続される。具体的には、誘導コイル１１の偶数巻き数Ｎに対し、誘導コイル１２の巻き数を（√３／２）Ｎとして、誘導コイル１２の一方の端を誘導コイル１１のＮ／２の位置に接続するように構成されている。 Two phases (for example, V phase and W phase) of three phases (U phase, V phase, and W phase) are connected to both ends of the induction coil 11. In addition, one end of the induction coil 12 is connected to the midpoint of the induction coil 11, and the other end of the induction coil 12 is the remaining one phase (for example, U phase) that is not connected to the induction coil 11 out of the three phases. Connected. Specifically, with respect to the even number of turns N of the induction coil 11, the number of turns of the induction coil 12 is (√3 / 2) N, and one end of the induction coil 12 is placed at the position N / 2 of the induction coil 11. Configured to connect.
本実施形態のスコット結線変圧器１００のスコット結線例としては、誘導コイル１１及び誘導コイル１２はどちらも巻き数Ｎのものを用いることが考えられる。具体的には、図２に示すように、誘導コイル１１の両端を三相交流電源のＶ相及びＷ相に接続し、誘導コイル１２の一端を誘導コイル１１のＮ／２の位置に接続する。そして、誘導コイル１２の（√３／２）Ｎの位置に三相交流電源のＵ相を接続する。このように、三相入力電圧と２回路の単相出力電圧とが同じになるように構成されている。さらに、誘導コイル１１の両端には、負荷１３が接続されており、誘導コイル１２の両端には、負荷１３と同容量の負荷２３が接続されている。 As an example of the Scott connection of the Scott connection transformer 100 of the present embodiment, it is conceivable that both the induction coil 11 and the induction coil 12 have N turns. Specifically, as shown in FIG. 2, both ends of the induction coil 11 are connected to the V phase and the W phase of the three-phase AC power supply, and one end of the induction coil 12 is connected to the N / 2 position of the induction coil 11. . Then, the U phase of the three-phase AC power supply is connected to the (√3 / 2) N position of the induction coil 12. Thus, the three-phase input voltage and the single-phase output voltage of the two circuits are configured to be the same. Furthermore, a load 13 is connected to both ends of the induction coil 11, and a load 23 having the same capacity as that of the load 13 is connected to both ends of the induction coil 12.
また、本実施形態では、主座脚鉄心４１、Ｔ座脚鉄心４２及び共通脚鉄心４３が平面視においてそれぞれが三角形の頂点に位置するように配置されている。 Further, in the present embodiment, the main seat leg core 41, the T seat leg core 42, and the common leg core 43 are arranged so as to be positioned at the apexes of the triangle in plan view.
本実施形態の主座脚鉄心４１及びＴ座脚鉄心４２は、図１及び図３に示すように、それぞれ互いに離間して設けられた上下方向に延びる断面略円形の脚鉄心である。具体的に主座脚鉄心４１及びＴ座脚鉄心４２は、インボリュート形状に湾曲された湾曲部を有する多数の磁性鋼板を放射状に積層して円筒状に形成した断面略円形のインボリュート鉄心により構成されている。また、この主座脚鉄心４１及びＴ座脚鉄心４２は互いに同寸法のものであり、主座脚鉄心４１の横断面積Ｓ１と、Ｔ座脚鉄心４２の横断面積Ｓ２とは互いに等しい。 As shown in FIGS. 1 and 3, the main seat leg core 41 and the T seat leg core 42 of the present embodiment are leg cores having a substantially circular cross section extending in the vertical direction and spaced apart from each other. Specifically, the main seat leg core 41 and the T seat leg core 42 are configured by an involute core having a substantially circular cross section formed by cylindrically laminating a large number of magnetic steel plates each having a curved portion curved in an involute shape. ing. Further, the main seat leg iron core 41 and the T seat leg iron core 42 have the same dimensions, and the cross sectional area S1 of the main seat leg iron core 41 and the cross sectional area S2 of the T seat leg iron core 42 are equal to each other.
共通脚鉄心４３は、上下方向に延びる断面略円形の脚鉄心である。具体的に共通脚鉄心４３は、前記脚鉄心４１、４２と同様に、インボリュート形状に湾曲された湾曲部を有する多数の磁性鋼板を放射状に積層して円筒状に形成した断面略円形のインボリュート鉄心により構成されている。また、この共通脚鉄心４３の横断面積Ｓ３は、主座脚鉄心４１、Ｔ座脚鉄心４２の横断面積Ｓ１、Ｓ２の√２倍である。具体的には、図１に示すように、共通脚鉄心４３の直径は、主座脚鉄心４１、Ｔ座脚鉄心４２の直径をｄとすると、√２０．５ｄである。 The common leg iron core 43 is a leg iron core having a substantially circular cross section extending in the vertical direction. Specifically, the common leg iron core 43 is an involute iron core having a substantially circular cross section formed in a cylindrical shape by radially laminating a plurality of magnetic steel plates having curved portions curved in an involute shape, like the leg iron cores 41 and 42. It is comprised by. The cross-sectional area S3 of the common leg core 43 is √2 times the cross-sectional areas S1 and S2 of the main seat leg core 41 and the T seat leg core 42. Specifically, as shown in FIG. 1, the diameter of the common leg core 43 is √2 0.5 d, where d is the diameter of the main seat leg core 41 and the T seat leg core 42.
継鉄心４４は、変形巻鉄心により構成されており、図１及び図３に示すように、主座脚鉄心４１、Ｔ座脚鉄心４２及び共通脚鉄心４３の上面を互いに連結する上継鉄心４４ａと、主座脚鉄心４１、Ｔ座脚鉄心４２及び共通脚鉄心４３の下面を互いに連結する下継鉄心４４ｂとにより構成されている。この上継鉄心４４ａ及び下継鉄心４４ｂは、平面視において共通脚鉄心４３を屈折点として折れ曲がっている。より詳細には、上継鉄心４４ａ及び下継鉄心４４ｂは、共通脚鉄心４３を中心にくの字に折れ曲がっている。つまり、上継鉄心４４ａ及び下継鉄心４４ｂは、共通脚鉄心４３を中心に左右対称形状となっている。 The yoke core 44 is composed of a deformed wound iron core, and as shown in FIGS. 1 and 3, an upper yoke core 44a that connects the upper surfaces of the main seat leg core 41, the T seat leg core 42 and the common leg iron core 43 to each other. And a lower core 44b that connects the lower surfaces of the main leg core 41, the T leg core 42, and the common leg core 43 to each other. The upper iron core 44a and the lower iron core 44b are bent with the common leg iron core 43 as a refracting point in plan view. More specifically, the upper iron core 44 a and the lower iron core 44 b are bent in a dogleg shape around the common leg iron core 43. That is, the upper iron core 44 a and the lower iron core 44 b are symmetrical with respect to the common leg iron core 43.
本実施形態では、主座脚鉄心４１及び共通脚鉄心４３の中心間距離Ｌ１と、Ｔ座脚鉄心４２及び共通脚鉄心４３の中心間距離Ｌ２とが互いに等しい。つまり、主座脚鉄心４１、Ｔ座脚鉄心４２と、共通脚鉄心４３とが平面視においてそれぞれが二等辺三角形の頂点に位置するように配置されている。 In this embodiment, the center distance L1 between the main seat leg core 41 and the common leg core 43 is equal to the center distance L2 between the T seat leg core 42 and the common leg core 43. That is, the main leg core 41, the T leg core 42, and the common leg core 43 are arranged so that each is located at the apex of an isosceles triangle in plan view.
また、本実施形態では、上継鉄心４４ａ及び下継鉄心４４ｂの折れ曲がり角度が１２０度となるように構成されている。具体的には、平面視において、主座脚鉄心４１の中心と共通脚鉄心４３の中心とを結ぶ線と、Ｔ座脚鉄心４２の中心と共通脚鉄心４３の中心とを結ぶ線とのなす角度が、約１２０度となるように構成されている。したがって、中心間距離Ｌ１及び中心間距離Ｌ２をそれぞれＤ／２とすると、主座脚鉄心４１及びＴ座脚鉄心４２の中心間距離は、Ｄｃｏｓ３０°となる。ここで、継鉄心４４を折り曲げる前と折り曲げた後との距離の差は、折り曲げ前の主座脚鉄心４１及びＴ座脚鉄心４２の中心間距離をＤとすると、近似値であるが、Ｄ−Ｄｃｏｓθ＝Ｄ（１−ｃｏｓ３０°）となる。そうすると、図７に示す従来の方形鉄心に対して短くなる距離は、近似値として、Ｄ（１−ｃｏｓ３０°）−ｄ｛（√２）０．５−（π√２）／４｝となる。 In the present embodiment, the bending angle of the upper core 44a and the lower core 44b is configured to be 120 degrees. Specifically, in plan view, a line connecting the center of the main leg core 41 and the center of the common leg core 43 and a line connecting the center of the T seat core 42 and the center of the common leg core 43 are formed. The angle is configured to be about 120 degrees. Therefore, when the center-to-center distance L1 and the center-to-center distance L2 are D / 2, the center-to-center distance between the main seat leg core 41 and the T seat leg core 42 is Dcos 30 °. Here, the difference in the distance between before and after bending the yoke core 44 is an approximate value when the distance between the centers of the main seat leg core 41 and the T seat leg core 42 before bending is D. −D cos θ = D (1−cos 30 °). Then, the distance shortened with respect to the conventional rectangular iron core shown in FIG. 7 is D (1-cos30 °) −d {(√2) 0.5 − (π√2) / 4} as an approximate value. .
このように構成したスコット結線変圧器１００によれば、主座脚鉄心４１、Ｔ座脚鉄心４２と、共通脚鉄心４３とが平面視においてそれぞれが三角形の頂点に位置するように配置されるとともに、継鉄心４４が、平面視において共通脚鉄心４３を中心にくの字に折れ曲がっているので、主座脚鉄心４１及びＴ座脚鉄心４２の間の距離を小さくして、鉄心全体の幅方向の寸法を小さくし、省スペース化を図ることができる。 According to the Scott connection transformer 100 configured as described above, the main seat leg iron core 41, the T seat leg iron core 42, and the common leg iron core 43 are arranged so that each is located at the apex of the triangle in plan view. In the plan view, the yoke core 44 is bent in a U-shape with the common leg core 43 as a center, so that the distance between the main seat leg core 41 and the T seat leg core 42 is reduced, and the width direction of the entire core is increased. It is possible to reduce the size and to save space.
また、本実施形態のスコット結線変圧器１００は、主座脚鉄心４１及び共通脚鉄心４３の中心間距離Ｌ１と、Ｔ座脚鉄心４２及び共通脚鉄心４３の中心間距離Ｌ２とが互いに等しいとともに、上継鉄心４４ａ及び下継鉄心４４ｂが、共通脚鉄心４３を中心に左右対称形状となっているので、主座脚鉄心４１及び共通脚鉄心４３の間の磁路長さと、Ｔ座脚鉄心４２及び共通脚鉄心４３の間の磁路長さとが等しくなるので、主座脚鉄心４１、Ｔ座脚鉄心４２の磁気特性が互いに同等となり、効率良く三相交流電源から２つの単相回路に変換することができる。 In the Scott connection transformer 100 of the present embodiment, the center distance L1 between the main seat leg core 41 and the common leg core 43 and the center distance L2 between the T seat leg core 42 and the common leg core 43 are equal to each other. Since the upper core 44a and the lower core 44b are symmetrical with respect to the common leg core 43, the magnetic path length between the main leg core 41 and the common leg core 43, and the T leg core. Since the magnetic path length between 42 and the common leg core 43 becomes equal, the magnetic characteristics of the main seat leg core 41 and the T seat leg core 42 are equal to each other, and the two single-phase circuits are efficiently converted from the three-phase AC power source. Can be converted.
さらに、本実施形態のスコット結線変圧器１００は、上継鉄心４４ａ及び下継鉄心４４ｂが、共通脚鉄心４３を中心に折れ曲がっているので、図４に示すように、上継鉄心４４ａ及び下継鉄心４４ｂの加工工程を簡略化することができる。具体的には、Ｖ字状の溝が形成された成型金型と、先端にＶ形の突起を有する成型金型とを用いることで、巻鉄心を扁平状に押し潰すとともに共通脚鉄心４３の横断面積に合わせて所定の大きさに膨らませる工程と、その扁平状に押し潰された巻鉄心を折り曲げる工程とを１つの工程にすることができる。これにより、継鉄心４４の加工構成を大幅に簡略化することができる。 Furthermore, in the Scott connection transformer 100 of the present embodiment, the upper iron core 44a and the lower iron core 44b are bent around the common leg iron core 43, and therefore, as shown in FIG. The machining process of the iron core 44b can be simplified. Specifically, by using a molding die in which a V-shaped groove is formed and a molding die having a V-shaped protrusion at the tip, the wound iron core is flattened and the common leg iron core 43 is deformed. The step of inflating to a predetermined size according to the cross-sectional area and the step of bending the flat iron core crushed into a flat shape can be made into one step. Thereby, the processing structure of the yoke core 44 can be simplified significantly.
なお、本発明は前記実施形態に限られるものではない。
例えば、図５に示すように、主座脚鉄心４１、Ｔ座脚鉄心４２と、共通脚鉄心４３とが平面視においてそれぞれが直角三角形の頂点に位置するように配置されており、共通脚鉄心４３が、直角三角形の頂点のうち直角である頂点に配置されるものであっても良い。具体的には、上継鉄心４４ａ及び下継鉄心４４ｂの折れ曲がり角度が９０度であり、主座脚鉄心２１の中心と共通脚鉄心２３の中心とを結ぶ線と、Ｔ座脚鉄心２２の中心と共通脚鉄心２３の中心とを結ぶ線とのなす角度が略直角になるように構成されている。したがって、中心間距離Ｌ１及び中心間距離Ｌ２をそれぞれＤ／２とすると、主座脚鉄心４１及びＴ座脚鉄心４２の中心間距離は、Ｄ／√２となる。これならば、主座脚鉄心４１、Ｔ座脚鉄心４２の距離をより小さくでき、鉄心全体の幅方向の寸法を小さくすることができる。ここで、継鉄心４４を折り曲げる前と折り曲げた後との距離の差は、折り曲げ前の主座脚鉄心４１及びＴ座脚鉄心４２の中心間距離をＤとすると、近似値であるが、Ｄ−Ｄ／√２＝Ｄ（１−１／√２）となる。そうすると、図７に示す従来の方形鉄心に対して短くなる距離は、近似値として、Ｄ（１−１／√２）−ｄ｛（√２）０．５−（π√２）／４｝となる。
The present invention is not limited to the above embodiment.
For example, as shown in FIG. 5, the main leg core 41, the T leg core 42, and the common leg core 43 are arranged so that each is located at the apex of a right triangle in plan view. 43 may be arranged at a vertex which is a right angle among vertices of a right triangle. Specifically, the bending angle of the upper core 44 a and the lower core 44 b is 90 degrees, the line connecting the center of the main leg core 21 and the center of the common leg core 23, and the center of the T seat leg core 22. And an angle formed by a line connecting the center of the common leg iron core 23 is substantially a right angle. Therefore, when the center-to-center distance L1 and the center-to-center distance L2 are D / 2, the center-to-center distance between the main seat leg core 41 and the T seat leg core 42 is D / √2. If it is this, the distance of the main seat leg iron core 41 and the T seat leg iron core 42 can be made smaller, and the dimension of the width direction of the whole iron core can be made small. Here, the difference in the distance between before and after bending the yoke core 44 is an approximate value when the distance between the centers of the main seat leg core 41 and the T seat leg core 42 before bending is D. −D / √2 = D (1-1 / √2). Then, the distance shortened with respect to the conventional rectangular iron core shown in FIG. 7 is D (1-1 / √2) −d {(√2) 0.5 − (π√2) / 4} as an approximate value. It becomes.
また、図６に示すように、上継鉄心４４ａ及び下継鉄心４４ｂが、共通脚鉄心４３を屈曲点として折れ曲がっていないものとすることも考えられる。この場合、巻鉄心を扁平状に押し潰すとともに共通脚鉄心４３の横断面積に合わせて所定の大きさに膨らませる工程と、その扁平状に押し潰された巻鉄心を折り曲げる工程との２工程に分けて行う必要がある。このように膨らませる工程と折り曲げる工程を分けて行うと、各部に皺が入ってしまう等の問題が生じてしまうため、何工程にも亘る工夫された工程が必要となってしまう。したがって、上継鉄心４４ａ及び下継鉄心４４ｂは、共通脚鉄心４３を屈曲点として折り曲げる構成の方が好ましい。 Moreover, as shown in FIG. 6, it is also considered that the upper core 44a and the lower core 44b are not bent with the common leg core 43 as a bending point. In this case, the wound iron core is crushed flat and expanded into a predetermined size according to the cross-sectional area of the common leg iron core 43, and the step of bending the flattened wound iron core is divided into two steps. It needs to be done separately. If the step of inflating and the step of folding are performed separately, problems such as wrinkles in each part occur, and thus many devised steps are required. Therefore, it is preferable that the upper iron core 44a and the lower iron core 44b be bent with the common leg iron core 43 as a bending point.
さらに、主座脚鉄心４１、Ｔ座脚鉄心４２及び共通脚鉄心４３は、断面略円形のものに限られず、楕円形や、多角形等であっても良い。 Furthermore, the main seat leg iron core 41, the T seat leg iron core 42, and the common leg iron core 43 are not limited to those having a substantially circular cross section, and may be oval or polygonal.
加えて、前記実施形態では、主座脚鉄心４１及び共通脚鉄心４３の中心間距離Ｌ１と、Ｔ座脚鉄心４２及び共通脚鉄心４３の中心間距離Ｌ２とが等しい構成であったが、前記中心間距離Ｌ１と中心間距離Ｌ２とが異なる構成であっても良い。 In addition, in the above embodiment, the center distance L1 between the main leg core 41 and the common leg core 43 is equal to the center distance L2 between the T seat leg core 42 and the common leg core 43. The center distance L1 may be different from the center distance L2.
さらに加えて、主座変圧器２及びＴ座変圧器３は、単巻変圧器に限られず、複巻変圧器であっても良い。 In addition, the main transformer 2 and the T seat transformer 3 are not limited to a single transformer, and may be a double transformer.
その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, it goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
１００・・・スコット結線変圧器
２ ・・・主座変圧器
３ ・・・Ｔ座変圧器
４１ ・・・主座脚鉄心
４２ ・・・Ｔ座脚鉄心
４３ ・・・共通脚鉄心
４４ ・・・継鉄心
４４ａ・・・上継鉄心
４４ｂ・・・下継鉄心
100 ... Scott connection transformer 2 ... Main seat transformer 3 ... T seat transformer 41 ... Main seat leg iron core 42 ... T seat leg iron core 43 ... Common leg iron core 44・ Joint core 44a ... Upper iron core 44b ... Lower iron core
Claims (7)
スコット結線されたコイルが巻回される２つの主脚鉄心と、
前記２つの主脚鉄心に生じる磁束の共通の通路になる共通脚鉄心と、
前記２つの主脚鉄心及び前記共通脚鉄心の上下それぞれを連結する継鉄心とを備え、
前記２つの主脚鉄心及び前記共通脚鉄心が、平面視において三角形の頂点に位置するように配置され、
前記継鉄心が、平面視において前記共通脚鉄心を屈折点として折れ曲がっているスコット結線変圧器用鉄心。 An iron core used for Scott connection transformers,
Two main leg cores around which Scott-connected coils are wound;
A common leg iron core serving as a common path for magnetic flux generated in the two main leg iron cores;
A yoke core connecting the upper and lower sides of the two main leg iron cores and the common leg iron core,
The two main leg iron cores and the common leg iron cores are arranged so as to be located at the vertices of a triangle in plan view,
An iron core for a Scott connection transformer, wherein the yoke core is bent with the common leg iron core as a refraction point in plan view.
前記共通脚鉄心が、前記直角三角形の頂点のうち直角である頂点に位置するように配置される請求項１又は２記載のスコット結線変圧器用鉄心。 The two main leg iron cores and the common leg iron core are arranged so as to be located at the apex of a right triangle in plan view;
The core for a Scott connection transformer according to claim 1 or 2, wherein the common leg iron core is disposed at a vertex that is a right angle among the vertices of the right triangle.
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| JP2013263904A JP6259277B2 (en) | 2013-12-20 | 2013-12-20 | Scott connection transformer iron core and Scott connection transformer |
| KR1020140093900A KR102195785B1 (en) | 2013-12-20 | 2014-07-24 | Power circuit, iron core for scott connected transformer, scott connected transformer and superheated steam generator |
| TW107113823A TWI647723B (en) | 2013-12-20 | 2014-07-28 | Scott's wiring transformer with three iron core |
| TW103125673A TWI636470B (en) | 2013-12-20 | 2014-07-28 | Superheated steam generator |
| TW107113821A TWI647721B (en) | 2013-12-20 | 2014-07-28 | Power supply unit |
| US14/444,746 US10650962B2 (en) | 2013-12-20 | 2014-07-28 | Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator |
| EP14178753.1A EP2887362B1 (en) | 2013-12-20 | 2014-07-28 | Power circuit, iron core for Scott connected transformer, Scott connected transformer and superheated steam generator |
| TW107113822A TWI647722B (en) | 2013-12-20 | 2014-07-28 | How to use the power supply unit |
| CN201410367031.0A CN104734525B (en) | 2013-12-20 | 2014-07-29 | Power supply device and its application method, overheated steam generation device |
| HK15108399.3A HK1207749A1 (en) | 2013-12-20 | 2015-08-28 | Power device and its usage, superheated steam generator, and iron core for scott connected transformer |
| US15/452,425 US10978243B2 (en) | 2013-12-20 | 2017-03-07 | Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator |
| US15/452,408 US10510480B2 (en) | 2013-12-20 | 2017-03-07 | Power circuit, iron core for Scott connected transformer, Scott connected transformer, and superheated steam generator |
| US15/452,368 US10840011B2 (en) | 2013-12-20 | 2017-03-07 | Power circuit, iron core for scott connected transformer, scott connected transformer, and superheated steam generator |
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| JPS5252178Y2 (en) * | 1973-07-10 | 1977-11-28 | ||
| DE2521666A1 (en) * | 1974-05-21 | 1975-12-04 | Martin & Cie Ets | STAR-SHAPED CORE ELEMENT FOR MAGNETIC FLOW FORMATION, PROCESS FOR ITS MANUFACTURING AND TRANSFORMER MANUFACTURED FROM IT |
| JPS5225216U (en) * | 1975-08-13 | 1977-02-22 | ||
| JPS52103670A (en) * | 1976-02-26 | 1977-08-31 | Tokyo Shibaura Electric Co | Reactor |
| JPS5918650Y2 (en) * | 1977-04-30 | 1984-05-30 | 特殊電機株式会社 | Modified wound core type 3-phase 4-legged transformer |
| JPS5915466Y2 (en) * | 1977-12-27 | 1984-05-08 | 日新電機株式会社 | Iron core reactor with gap |
| JPS5831377Y2 (en) * | 1977-12-28 | 1983-07-12 | 特殊電機株式会社 | 3-phase butting type deformed wound core |
| JPS5967915U (en) * | 1982-10-29 | 1984-05-08 | 関西電力株式会社 | voltage regulator |
| JPS61228608A (en) * | 1985-04-01 | 1986-10-11 | Nissin Electric Co Ltd | Shunt reactor |
| JP2007129135A (en) * | 2005-11-07 | 2007-05-24 | Shinyosha:Kk | Phase-shifting voltage regulator |
| JP4942605B2 (en) * | 2007-10-03 | 2012-05-30 | トクデン株式会社 | Three-phase induction machine |
| JP5522658B2 (en) * | 2009-10-08 | 2014-06-18 | トクデン株式会社 | Static induction equipment |
| JP2013128057A (en) * | 2011-12-19 | 2013-06-27 | Jib Electric Co Ltd | Scott connection transformer |
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