JP3039434U - Distribution transformer in single-phase three-wire low-voltage distribution circuit - Google Patents
Distribution transformer in single-phase three-wire low-voltage distribution circuitInfo
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- JP3039434U JP3039434U JP1997000258U JP25897U JP3039434U JP 3039434 U JP3039434 U JP 3039434U JP 1997000258 U JP1997000258 U JP 1997000258U JP 25897 U JP25897 U JP 25897U JP 3039434 U JP3039434 U JP 3039434U
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Abstract
(57)【要約】
【課題】 中性線と外側線との間に配している不平衡な
負荷によって生じる不平衡電流が流れても、電圧を平衡
に保つことができるとともに、電流を流すことから生じ
る磁束を打ち消し合う作用によって発生する電磁ノイズ
を防止することができる単相３線式低圧配電回路におけ
る分電変圧器を提供する。
【解決手段】 Ｒ相及びＴ相からの電力出力を利用した
単相３線式低圧配電回路において、互いに対向する２つ
の長辺部を有する環状の鉄心部材を設けて、該鉄心部材
の一方の長辺部に、ともにコイル捲数が等しく、且つ捲
線方向が異なるＲ相コイル及びＴ相コイルを巻きつけて
直列に接続し、Ｒ相コイル及びＴ相コイルと単相３線式
回路の中性線とを、該鉄心部材の長辺部の略中間で接続
することができるようにし、且つＲ相コイル及びＴ相コ
イルの夫々の外端と単相３線式回路の夫々の外側線とを
接続することができるようにした。
(57) [Abstract] [Problem] Even if an unbalanced current generated by an unbalanced load disposed between a neutral wire and an outer wire flows, the voltage can be kept in balance and the current flows. (EN) Provided is a distribution transformer in a single-phase three-wire low-voltage distribution circuit, which can prevent electromagnetic noise generated by the effect of canceling out magnetic fluxes generated by the above. In a single-phase three-wire low-voltage distribution circuit that uses power output from R-phase and T-phase, an annular iron core member having two long side portions facing each other is provided, and one of the iron core members is provided. Along the long sides, R-phase coils and T-phase coils with the same number of coil turns and different winding directions are wound and connected in series. To connect the wires to each other at approximately the middle of the long side of the iron core member, and connect the outer ends of the R-phase coil and the T-phase coil to the outer wires of the single-phase three-wire circuit. I was able to connect.
Description
【０００１】[0001]
本考案は、一般家庭又は工場等で用いられる単相３線式低圧配電回路における 分電変圧器に関する。 The present invention relates to a distribution transformer in a single-phase three-wire low-voltage distribution circuit used in a general household or factory.
【０００２】[0002]
一般家庭又は工場等で用いられている１００Ｖ／２００Ｖ使用の単相３線式低 圧配電回路は、配電盤に配電変圧器を設けており、配電変圧器の低圧側の捲線を 直列にして両外側線及び中性線の３線によって電力を需要家に供給している。こ の方式により、外側線と中性線間が１００Ｖ、両外側線間が２００Ｖと一つの配 線から２種類の電圧が得られるという特長がある。 The 100V / 200V single-phase 3-wire low-voltage distribution circuit used in general households or factories has a distribution transformer installed in the distribution board, and the windings on the low-voltage side of the distribution transformer are connected in series to both outsides. Electricity is supplied to customers by three lines, a neutral line and a neutral line. This method has the feature that two types of voltage can be obtained from one wiring, with 100V between the outer wire and the neutral wire and 200V between both outer wires.
【０００３】[0003]
従来の単相３線式低圧配電回路では、一方の外側線と中性線との間に接続され ている負荷と、もう一方の外側線と中性線との間に接続されている負荷との不平 衡によって、不平衡電流が流れ、その結果、外側線と中性線間の夫々の電圧に不 平衡が生じ、これにより、一方の電圧が極端に降下するという問題点を有する。 In a conventional single-phase three-wire low-voltage distribution circuit, a load connected between one outer wire and a neutral wire and a load connected between the other outer wire and a neutral wire Due to the unbalance, the unbalanced current flows, and as a result, the respective voltages between the outer wire and the neutral wire are unbalanced, which causes one of the voltages to drop extremely.
【０００４】 このような電圧の不平衡からくる電圧の極端な降下により、線間電圧がその公 称電圧（例えば、一般用は１００Ｖ／２００Ｖ）に対して許されている所定の許 容電圧値（電気事業法で公称電圧１００Ｖにおいて９５Ｖ〜１０７Ｖの範囲と定 められている。）よりも外れることがないよう、従来では配電変圧器からは公称 電圧（一般用では線路損失を考慮して１０５Ｖ／２１０Ｖで配電している。）よ り幾分高い電圧が供給されている。このため、需要家には必要な電圧値よりも相 当高い電圧が供給され、需要家側では負荷において余計な電力を無駄に消費する という傾向を生じるという課題があった。Due to such an extreme drop of the voltage due to the voltage imbalance, the line voltage is a predetermined allowable voltage value that is allowed for the nominal voltage (for example, 100V / 200V for general use). (It is defined by the Electricity Business Act as a range of 95V to 107V at a nominal voltage of 100V.) In order to prevent the voltage from deviating from the conventional value, the power distribution transformer is conventionally rated at a nominal voltage (for general use, 105V in consideration of line loss). / 210V is used for distribution.) A slightly higher voltage is supplied. For this reason, there is a problem in that the customer is supplied with a voltage that is significantly higher than the required voltage value, and the customer side tends to wastefully consume extra power in the load.
【０００５】 また、単相３線式低圧配線回路の負荷が平衡であっても、何らかの原因で中性 線が切断して中性線に電流が流れなくなると、外側線と中性線間の夫々の負荷の 端子電圧が、非常な不平衡を生じ、ときには致命的な損害を与える。また、この ことから、中性線には配線用遮断器や、ヒューズ等を入れることができないとい う問題点があり、上記の課題を解決することは困難である。Further, even if the load of the single-phase three-wire low-voltage wiring circuit is balanced, if the neutral wire is cut off for some reason and the current no longer flows in the neutral wire, there will be a gap between the outer wire and the neutral wire. The terminal voltages of the respective loads cause a great deal of imbalance and sometimes catastrophic damage. Further, from this, there is a problem that it is not possible to insert a circuit breaker or a fuse in the neutral wire, and it is difficult to solve the above problems.
【０００６】 そこで、上記の課題を解決す手段として、電源端ではなく、負荷端で接続する バランサが考案された。このバランサは、互いに対向する２つの長辺部を有する 環状の鉄心部材を設け、この鉄心部材の一方の長辺部に、ともにコイル捲数を等 しくしたＲ相コイル及びＴ相コイルを巻きつけて、さらに、もう一方の長辺部に も同様に、ともにコイル捲数を等しくしたＲ相コイル及びＴ相コイルを巻き付け て、直列に接続し、接続部で単相３線式低圧配線回路の中性線と接続できるよう にし、一方の２つのコイルの外端と単相３線式低圧配線回路の夫々の外側線とを 接続することができるようにした。Therefore, as a means for solving the above problems, a balancer has been devised which is connected not at the power source end but at the load end. This balancer is provided with an annular iron core member having two long side portions facing each other, and an R phase coil and a T phase coil having the same number of coil windings are wound around one long side portion of the iron core member. Similarly, on the other long side, similarly, wind an R-phase coil and a T-phase coil with the same number of coil turns, connect them in series, and connect the single-phase three-wire low-voltage wiring circuit at the connection part. It was designed so that it could be connected to a neutral wire, and the outer ends of two coils on one side could be connected to the respective outer wires of a single-phase three-wire low-voltage wiring circuit.
【０００７】 上記バランサによって、負荷の不平衡による夫々の電圧の不平衡は改善された が、上記バランサに、電流を流すことにより発生する磁束を打ち消しあう作用を 起こす結果、電磁ノイズが発生する。これによって、無駄に電力を消費してしま い、上記の課題は改善しつつあるが、解決したとは言えない。Although the balancers have improved the respective voltage imbalances due to the load imbalance, electromagnetic noises are generated as a result of the balancer's effect of canceling out the magnetic flux generated by the current flow. As a result, power is unnecessarily consumed, and the above problems are improving, but they cannot be said to have been solved.
【０００８】 本考案は、上記の問題点や課題を解決するために、中性線と外側線との間に配 している不平衡な負荷によって生じる不平衡電流が流れても、電圧を平衡に保つ とともに、電流を流すことから生じる磁束を打ち消し合う作用によって発生する 電磁ノイズを防止することができる単相３線式低圧配電回路における分電変圧器 を提供することが目的である。In order to solve the above problems and problems, the present invention balances the voltage even when an unbalanced current generated by an unbalanced load arranged between the neutral wire and the outer wire flows. It is an object of the present invention to provide a distribution transformer in a single-phase three-wire low-voltage distribution circuit that can maintain the above-mentioned value and prevent the electromagnetic noise generated by the action of canceling out the magnetic flux generated by the current flow.
【０００９】[0009]
前記目的を達成するために、Ｒ相及びＴ相からの電力出力を利用した単相３線 式低圧配電回路において、互いに対向する２つの長辺部を有する環状の鉄心部材 を設けて、該鉄心部材の一方の長辺部に、ともにコイル捲数が等しく、且つ捲線 方向が異なるＲ相コイル及びＴ相コイルを巻きつけて直列に接続し、Ｒ相コイル 及びＴ相コイルと単相３線式回路の中性線とを、該鉄心部材の長辺部の略中間で 接続することができるようにし、且つＲ相コイル及びＴ相コイルの夫々の外端と 単相３線式回路の夫々の外側線とを接続することができるようにしたことを特徴 とする。 In order to achieve the above-mentioned object, in a single-phase three-wire low-voltage distribution circuit using electric power output from R-phase and T-phase, an annular core member having two long side portions facing each other is provided, and the iron core is provided. The R-phase coil and the T-phase coil having the same number of coil turns and different winding directions are wound around one long side of the member and connected in series, and the R-phase coil and the T-phase coil are single-phase three-wire type. A neutral wire of the circuit can be connected substantially in the middle of the long side portion of the iron core member, and the outer ends of the R-phase coil and the T-phase coil and the single-phase three-wire circuit, respectively. It is characterized in that it can be connected to the outside line.
【００１０】 上記鉄心部材を２つ設けて、該鉄心部材の長辺部で衝合させた部分に、上記Ｒ 相コイル及びＴ相コイルを巻きつけるとよい。 または、上記鉄心部材を２つ設けて、一方の鉄心部材の長辺部にＲ相コイルを 、もう一方の鉄心部材の長辺部にＴ相コイルを夫々巻きつけるとともに、２つの 鉄心部材の間に中性線を配することができるようにするとよい。It is preferable that two iron core members are provided, and the R-phase coil and the T-phase coil are wound around a portion where the long side portions of the iron core members are abutted with each other. Alternatively, by providing two of the above-mentioned iron core members, winding an R-phase coil around the long side of one iron core member and winding a T-phase coil around the long side of the other iron core member, and between the two iron core members. It is advisable to be able to place a neutral wire in.
【００１１】 さらに、上記Ｒ相コイルと上記Ｔ相コイルとからなるバランサコイル及び直列 コイルにおいて、該バランサコイルと該直列コイルのＲ相コイル同士及びＴ相コ イル同士、並びに該バランサコイルのＲ相コイルとＴ相コイルとを夫々直列に接 続するとともに、該バランサコイルのＲ相コイル及びＴ相コイルと負荷とが並列 に接続されることができるようにするとよい。Further, in the balancer coil and the series coil composed of the R-phase coil and the T-phase coil, the balancer coil and the R-phase coils of the series coil and the T-phase coils, and the R-phase of the balancer coil are It is preferable that the coil and the T-phase coil are connected in series, and that the R-phase coil and the T-phase coil of the balancer coil and the load can be connected in parallel.
【００１２】[0012]
図１に、本考案単相３線式低圧配電回路における分電変圧器の一実施例を示し てある。 互いに対向する２つの長辺部１２Ａ，１２Ｂを有する環状の鉄心部材１１Ａ， １１Ｂを２つ設ける。これらの鉄心部材１１Ａ，１１Ｂの一方の長辺部１２Ａど うしを衝合させて、コイル捲回用脚部１３を形成する。コイル捲回用脚部１３に 、コイル捲数が等しく、捲線方向が異なる２本のコイルを用意し、コイル捲回用 脚部１３の中間から上方にＲ相１４を、下方にＴ相１５を設けて、Ｒ相１４には 正巻に巻いたＲ相コイル１６を、Ｔ相１５には逆巻に巻いたＴ相コイル１７を夫 々巻き付けて、Ｒ相コイル１６とＴ相コイル１７とをコイル捲回用脚部１３の略 中央部で直列に接続する。また、接続部で単相３線式低圧配線回路の中性線と接 続できるようにする。さらに、Ｒ相コイル１６の外端でＲ相の外側線とを、Ｔ相 コイル１７の外端でＴ相の外側線とを夫々接続できるようにする。 FIG. 1 shows an embodiment of a distribution transformer in a single-phase three-wire type low voltage distribution circuit of the present invention. Two annular iron core members 11A and 11B having two long side portions 12A and 12B facing each other are provided. One of the long side portions 12A of the iron core members 11A and 11B is abutted against each other to form the coil winding leg portion 13. Two coils having the same number of coil windings but different winding directions are prepared for the coil winding leg portion 13, and the R phase 14 is provided upward from the middle of the coil winding leg portion 13 and the T phase 15 is provided below. The R-phase coil 16 is wound around the R-phase 14 in a forward winding, and the T-phase coil 17 is wound around the T-phase 15 in a reverse winding. The coil winding legs 13 are connected in series at substantially the center. The connection shall be such that it can be connected to the neutral wire of the single-phase three-wire low-voltage wiring circuit. Further, the outer end of the R-phase coil 16 can be connected to the outer wire of the R-phase, and the outer end of the T-phase coil 17 can be connected to the outer wire of the T-phase.
【００１３】 以上のような構成にして中性線から電流を流す。Ｒ相コイル１６及びＴ相コイ ル１７はコイル捲数が等しいので、Ｒ相コイル１６及びＴ相コイル１７の内部イ ンピーダンスも等しいとともに、Ｒ相コイル１６と、Ｔ相コイル１７とに流れる 電流値が等しい。また、捲線方向が異なるようにしたので、Ｒ相コイル１６及び Ｔ相コイル１７より発生する磁束方向が同じになり、漏れ磁束が少なくなるとと もに、磁束を打ち消し合う作用がないため、電磁ノイズが発生する恐れがない。With the above-mentioned structure, a current is passed from the neutral wire. Since the R-phase coil 16 and the T-phase coil 17 have the same number of coil windings, the internal impedances of the R-phase coil 16 and the T-phase coil 17 are also equal, and the current value flowing through the R-phase coil 16 and the T-phase coil 17 is the same. Are equal. Also, since the winding directions are different, the directions of the magnetic flux generated from the R-phase coil 16 and the T-phase coil 17 are the same, the leakage flux is reduced, and the magnetic fluxes do not cancel each other out, so that the electromagnetic noise There is no fear of occurrence.
【００１４】 図２は、図１図示の分電変圧器とは別の実施例を示した図である。 互いに対向する２つの長辺部１２Ａ，１２Ｂを有する環状の鉄心部材１１Ａ， １１Ｂを２つ設ける。また、鉄心部材１１Ａ，１１Ｂに設けた長辺部１２Ａ，１ ２Ａに巻くために、コイル捲数が等しく、捲線方向が異なる２本のコイルを用意 し、一方の鉄心部材１１Ａの長辺部１２ＡにＲ相１４を、もう一方の鉄心部材１ １Ｂの長辺部１２ＡにＴ相１５を設けて、Ｒ相１４には正巻に巻いたＲ相コイル １６を、Ｔ相１５には逆巻に巻いたＴ相コイル１７を夫々巻き付けて、Ｒ相コイ ル１６とＴ相コイル１７とを鉄心部材１１Ａ，１１Ｂの間に設けた接続部１８で 直列に接続する。また、接続部１８で単相３線式低圧配線回路の中性線と接続で きるようにする。さらに、Ｒ相コイル１６の外端でＲ相の外側線と、Ｔ相コイル の外端でＴ相の外側線とを夫々接続できるようにする。FIG. 2 is a diagram showing another embodiment different from the distribution transformer shown in FIG. Two annular iron core members 11A and 11B having two long side portions 12A and 12B facing each other are provided. Further, in order to wind the long side portions 12A and 12A provided on the iron core members 11A and 11B, two coils having the same number of coil turns and different winding directions are prepared, and the long side portion 12A of one iron core member 11A is prepared. The R phase 14 is provided on the other side, the T side 15 is provided on the long side portion 12A of the other iron core member 11B, the R phase coil 16 is wound positively on the R phase 14, and the reverse winding is provided on the T phase 15. Each of the wound T-phase coils 17 is wound, and the R-phase coil 16 and the T-phase coil 17 are connected in series at a connecting portion 18 provided between the iron core members 11A and 11B. In addition, the connection portion 18 is configured to be connectable with the neutral wire of the single-phase three-wire low-voltage wiring circuit. Further, the outer end of the R-phase coil 16 and the outer end of the T-phase coil can be connected to the outer end of the R-phase coil, respectively.
【００１５】 以上のような構成にして、中性線から電流を流す。図１図示の実施例と同様に 、Ｒ相コイル１６及びＴ相コイル１７はコイル捲数が等しいので、Ｒ相コイル１ ６及びＴ相コイル１７の内部インピーダンスも等しいとともに、Ｒ相コイル１６ と、Ｔ相コイル１７とに流れる電流値が等しい。また、捲線方向が異なるように したので、Ｒ相コイル１６及びＴ相コイル１７より発生する磁束方向が同じにな り、漏れ磁束が少なくなるとともに、磁束を打ち消し合う作用がないため、電磁 ノイズが発生する恐れがない。With the above-described structure, a current is passed from the neutral wire. Similar to the embodiment shown in FIG. 1, since the R-phase coil 16 and the T-phase coil 17 have the same number of coil turns, the R-phase coil 16 and the T-phase coil 17 have the same internal impedance, and The current values flowing through the T-phase coil 17 are equal. Further, since the winding directions are different, the directions of the magnetic fluxes generated from the R-phase coil 16 and the T-phase coil 17 are the same, the leakage flux is reduced, and the magnetic fluxes do not cancel each other out, so electromagnetic noise is reduced. There is no fear of this occurring.
【００１６】 図３は、異なった電流値の電流が流れる２つの負荷を配した単相３線式低圧配 電回路に、本考案分電変圧器を組み込んだ図である。 本実施例単相３線式低圧配電回路は、夫々の内部抵抗がｒである中性線２１、 Ｒ相の外側線２２、Ｔ相の外側線２３から構成されている単相３線２０の配電側 には、高電圧（一般では６６００Ｖ）から低電圧（公称１００Ｖ／２００Ｖ）に 変電する配電変圧器３１を接続し、また、分電側には、中性線２１と負荷Ａと負 荷Ｂとの接続部１８で接続するとともに、Ｒ相の外側線２２はＲ相コイル１６及 び負荷Ａの外端と、Ｔ相の外側線２３はＴ相コイル１７及び負荷Ｂの外端と、夫 々接続する。FIG. 3 is a diagram in which the distribution transformer of the present invention is incorporated into a single-phase three-wire low-voltage distribution circuit in which two loads in which currents having different current values flow are arranged. The single-phase three-wire low-voltage distribution circuit according to the present embodiment includes a single-phase three-wire 20 including a neutral wire 21 having an internal resistance of r, an outer wire 22 of the R phase, and an outer wire 23 of the T phase. A distribution transformer 31 that transforms a high voltage (generally 6600V) to a low voltage (nominal 100V / 200V) is connected to the distribution side, and the neutral line 21, load A and load are connected to the distribution side. The outer wire 22 of the R phase is connected to the outer end of the R phase coil 16 and the load A, and the outer wire 23 of the T phase is connected to the outer end of the T phase coil 17 and the load B. Connect each one.
【００１７】 外側線２２，２３と中性線２１との間の夫々の電圧をＶ0 、負荷Ａ間の電圧を Ｖ1 、負荷Ｂ間の電圧をＶ2 にする。また、分電変圧器１０を接続する前の中性 線２１を流れる電流値をＩ0 （＞０）、Ｒ相の外側線２２を流れる電流値をＩ1 （＞０）、Ｔ相の外側線２３を流れる電流値をＩ2 （＞０）とするとともに、分 電変圧器１０を負荷端で接続した後に負荷Ａを配している回路から分電変圧器１ ０の中性線２１を通る電流値を２ＩB （＞０）とする。 分電変圧器１０を負荷端で接続する前には、Ｉ1 ＝Ｉ0 ＋Ｉ2 （１） の関係が成り立つ。 また、分電変圧器１０を負荷端で接続した後の夫々のコイル１６，１７には等 しい電流値ＩB が流れるから、接続した後において、中性線２１を流れる電流値 はＩ0 −２ＩB 、Ｒ相の外側線２２を流れる電流値はＩ1 −ＩB 、Ｔ相の外側線 ２３を流れる電流値はＩ2 ＋ＩB となる。 このとき、負荷Ａを通る電流値はＩ1 であり、この電流は分電変圧器１０の中 性線２１’方向と、負荷Ｂ方向とへ分かれるから、 Ｉ1 ＝Ｉ2 ＋２ＩB （２） となり、中性線２１に流れる電流値は（１）、（２）より、 Ｉ0 −２ＩB ＝Ｉ1 −Ｉ2 −２ＩB ＝０ となり、これにより中性線２１間の電圧も０となる。 従って、Ｒ相の外側線２２にはＩ1 −ＩB の電流が流れ、Ｔ相の外側線２３に はＩ2 ＋ＩB の電流が流れる。よって、Ｒ相の外側線２２の電圧ＶR は、 ＶR ＝（Ｉ1 −ＩB ）・ｒ （３） となり、Ｔ相の外側線２３の電圧ＶT は、ＶT ＝（Ｉ2 ＋ＩB ）・ｒ （４） となる。 （２）より、Ｉ1 −ＩB ＝Ｉ2 ＋ＩB なので、ＶR ＝ＶT となり、よって、 Ｖ1 ＝Ｖ0 −ＶR ＝Ｖ0 −ＶT ＝Ｖ2 （５） となり、電圧は安定する。The respective voltages between the outer wires 22 and 23 and the neutral wire 21 are V 0 , the voltage between the loads A is V 1 , and the voltage between the loads B is V 2 . Further, the current value flowing through the neutral line 21 before connecting the distribution transformer 10 is I 0 (> 0), the current value flowing through the R-phase outer line 22 is I 1 (> 0), and the T-phase outer side. The current value flowing through the line 23 is set to I 2 (> 0), and the neutral line 21 of the distribution transformer 10 is connected to the neutral line 21 of the distribution transformer 10 after connecting the distribution transformer 10 at the load end. the current through the 2I B (> 0). Before connecting the distribution transformer 10 at the load end, the relationship of I 1 = I 0 + I 2 (1) holds. Further, since the equal current value I B flows through the coils 16 and 17 after the distribution transformer 10 is connected at the load end, the current value flowing through the neutral wire 21 after connection is I 0 −. 2I B , the current value flowing through the R-phase outer line 22 is I 1 −I B , and the current value flowing through the T-phase outer line 23 is I 2 + I B. At this time, the value of the current passing through the load A is I 1 , and this current is divided into the direction of the neutral line 21 ′ of the distribution transformer 10 and the direction of the load B, so I 1 = I 2 + 2I B (2) next, the current value flowing through the neutral conductor 21 (1), from (2), I 0 -2I B = I 1 -I 2 -2I B = 0 , and the thereby also the voltage between the neutral line 21 0 Become. Therefore, a current of I 1 −I B flows in the outer line 22 of the R phase, and a current of I 2 + I B flows in the outer line 23 of the T phase. Therefore, the voltage V R of the R -phase outer line 22 becomes V R = (I 1 −I B ) · r (3), and the voltage V T of the T -phase outer line 23 becomes V T = (I 2 + I B ) · r (4). From (2), I 1 −I B = I 2 + I B, so that V R = V T , and thus V 1 = V 0 −V R = V 0 −V T = V 2 (5), and the voltage is Stabilize.
【００１８】 図４は、ともにコイル捲数が等しく、且つ捲線方向が異なるＲ相コイル及びＴ 相コイルから構成されているバランサコイル２６及び直列コイル２７を組み合わ せた分電変圧器の実施例を示した図であり、バランサコイル２６は、主としてバ ランサの役割をし、直列コイル２７は電力供給を効率よく行う役割をする。FIG. 4 shows an embodiment of a distribution transformer in which a balancer coil 26 and a series coil 27, which are both R-phase coils and T-phase coils having the same number of coil turns but different winding directions, are combined. In the figure, the balancer coil 26 mainly serves as a balancer, and the series coil 27 serves to efficiently supply electric power.
【００１９】 上記のバランサコイル２６と直列コイル２７とを以下のように接続する。 先ず、バランサコイル２６において、コイル捲数が等しく、捲線方向が異なる ２本のコイルを用意し、Ｒ相１４には正巻に巻いたＲ相コイル２６Ａを、Ｔ相１ ５には逆巻に巻いたＴ相コイル２６Ｂを夫々巻き付けて、Ｒ相コイル２６ＡとＴ 相コイル２６Ｂとを直列に接続する。また、接続部２８で単相３線式低圧配線回 路の中性線（図示しない）と接続できるようにするとともに、接続部２８と夫々 のコイル２６Ａ，２６Ｂの外端で負荷が介在することができるようにする。The balancer coil 26 and the series coil 27 described above are connected as follows. First, in the balancer coil 26, two coils having the same number of coil windings but different winding directions are prepared, and the R phase coil 26A wound in the forward winding is wound on the R phase 14 and the reverse winding is wound on the T phase 15. Each of the wound T-phase coils 26B is wound, and the R-phase coil 26A and the T-phase coil 26B are connected in series. In addition, the connecting portion 28 should be able to connect to a neutral wire (not shown) of the single-phase three-wire low-voltage wiring circuit, and a load should be present at the outer end of the connecting portion 28 and the respective coils 26A, 26B. To be able to
【００２０】 また、直列コイル２７においても、コイル捲数が等しく、捲線方向が異なる２ 本のコイルを用意し、Ｒ相１４には正巻に巻いたＲ相コイル２７Ａを、Ｔ相１５ には逆巻に巻いたＴ相コイル２７Ｂを夫々巻き付ける。このとき、Ｒ相コイル２ ６Ａ，２７Ａ同士及びＴ相コイル２６Ｂ，２７Ｂ同士の捲線方向は同じでなけれ ばならない。そして、Ｒ相コイル２７Ａとバランサコイル２６のＲ相コイル２６ Ａの外端とを、Ｔ相コイル２７Ｂとバランサコイル２６のＴ相コイル２６Ｂの外 端とを、夫々接続し、Ｒ相コイル２７Ａ及びＴ相コイル２７Ｂの未接続側は、単 相３線式低圧配線回路の夫々の相の外側線（図示しない）と夫々接続できるよう にする。Also, for the series coil 27, two coils having the same number of coil windings but different winding directions are prepared. The R phase coil 27A is wound in a positive winding and the R phase 14 is wound in the T phase 15. The T-phase coils 27B wound in the reverse winding are wound respectively. At this time, the winding directions of the R-phase coils 26A and 27A and the T-phase coils 26B and 27B must be the same. Then, the R-phase coil 27A and the outer end of the R-phase coil 26A of the balancer coil 26 are connected to the T-phase coil 27B and the outer end of the T-phase coil 26B of the balancer coil 26, respectively. The unconnected side of the T-phase coil 27B can be connected to the outside wire (not shown) of each phase of the single-phase three-wire low-voltage wiring circuit.
【００２１】[0021]
本考案単相３線式低圧配電回路における分電変圧器は、以上の構成より、以下 の効果を有する。 環状の鉄心部材の一方の長辺部に、コイル捲数を等しく、捲線方向が異なるＲ 相コイル及びＴ相コイルを巻き付けており、Ｒ相コイルとＴ相コイルを長辺部の 略中間部で直列で接続しているので、Ｒ相コイル及びＴ相コイルの磁束方向が同 方向であることより、電流を流すことによって発生する漏れ磁束が少ない、即ち 磁束を打ち消し合う作用がなくなり、電磁ノイズの発生を防止することができる 。この結果、漏れインダクタンスが少ないとともに、Ｒ相コイル及びＴ相コイル の内部インピーダンスが略等しくなり、この結果不平衡電流を吸収してバランサ 効果による均圧作用によって、外側線と中性線の間に配した負荷間の電圧が平衡 に保たれる。従って、極端な電圧降下の恐れがないので、公称電圧に近い値で電 圧を供給しても、何ら支障はないので、余計な電力を無駄に消費することなく、 電力を効率よく供給することができるという効果を有する。さらに、直列コイル を設ければ、バランサコイルのみによる場合より、電力を節約することができる という効果を有する。 The distribution transformer in the single-phase three-wire low-voltage distribution circuit of the present invention has the following effects due to the above configuration. An R-phase coil and a T-phase coil having the same number of coil turns but different winding directions are wound around one long side of the annular iron core member, and the R-phase coil and the T-phase coil are provided at a substantially middle portion of the long side. Since they are connected in series, the magnetic flux directions of the R-phase coil and the T-phase coil are in the same direction, so there is little leakage magnetic flux generated by passing current, that is, the effects of canceling out the magnetic flux are eliminated, and electromagnetic noise It can be prevented from occurring. As a result, the leakage inductance is small, and the internal impedances of the R-phase coil and the T-phase coil are approximately equal. The voltage between the placed loads is balanced. Therefore, there is no fear of an extreme voltage drop, and even if the voltage is supplied at a value close to the nominal voltage, there will be no problem, and power will be supplied efficiently without wasting extra power. It has the effect that Furthermore, the provision of the series coil has an effect of saving electric power as compared with the case of using only the balancer coil.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本考案単相３線式低圧配電回路における分電変
圧器の実施例を示した図である。FIG. 1 is a diagram showing an embodiment of a distribution transformer in a single-phase three-wire low-voltage distribution circuit according to the present invention.
【図２】本考案分電変圧器の別の実施例を示した図であ
るFIG. 2 is a view showing another embodiment of the distribution transformer of the present invention.
【図３】本考案分電変圧器を単相３線式低圧配電回路に
組み込んだ回路図である。FIG. 3 is a circuit diagram of the distribution transformer of the present invention incorporated in a single-phase three-wire low-voltage distribution circuit.
【図４】本考案分電変圧器におけるコイルを２組組み合
わせた実施例を示した図である。FIG. 4 is a view showing an embodiment in which two sets of coils are combined in the distribution transformer of the present invention.
１０ 分電変圧器 １１Ａ，１１Ｂ 鉄心部材 １２Ａ，１２Ｂ 長辺部 １３ コイル捲回用脚部 １４ Ｒ相 １５ Ｔ相 １６ Ｒ相コイル １７ Ｔ相コイル １８ 接続部 ２０ 単相３線 ２１ 中性線 ２２，２３ 外端部 ２６ バランサコイル ２６Ａ Ｒ相コイル ２６Ｂ Ｔ相コイル ２７ 直列コイル ２７Ａ Ｒ相コイル ２７Ｂ Ｔ相コイル ２８ 接続部 ３１ 配電変圧器 Ａ，Ｂ 負荷 10 Distribution transformer 11A, 11B Iron core member 12A, 12B Long side part 13 Coil winding leg part 14 R phase 15 T phase 16 R phase coil 17 T phase coil 18 Connection part 20 Single phase 3 wire 21 Neutral wire 22 , 23 Outer end portion 26 Balancer coil 26A R-phase coil 26B T-phase coil 27 Series coil 27A R-phase coil 27B T-phase coil 28 Connection portion 31 Distribution transformer A, B Load
Claims (4)
単相３線式低圧配電回路において、互いに対向する２つ
の長辺部を有する環状の鉄心部材を設けて、該鉄心部材
の一方の長辺部に、ともにコイル捲数が等しく、且つ捲
線方向が異なるＲ相コイル及びＴ相コイルを巻きつけ
て、直列に接続し、Ｒ相コイル及びＴ相コイルと単相３
線式回路の中性線とを、該鉄心部材の長辺部の略中間で
接続することができるようにし、且つＲ相コイル及びＴ
相コイルの夫々の外端と単相３線式回路の夫々の外側線
とを接続することができるようにしたことを特徴とする
単相３線式低圧配線回路における分電変圧器。1. A single-phase three-wire low-voltage distribution circuit using electric power output from R-phase and T-phase, wherein an annular core member having two long side portions facing each other is provided, and one of the core members is provided. R-phase coils and T-phase coils having the same number of coil windings and different winding directions are wound around the long sides of the, and are connected in series, and the R-phase coil, the T-phase coil, and the single phase 3
A neutral wire of a wire-type circuit can be connected substantially in the middle of the long side of the iron core member, and the R-phase coil and the T-phase coil can be connected.
A distribution transformer in a single-phase three-wire low-voltage wiring circuit, characterized in that each outer end of the phase coil can be connected to each outer wire of the single-phase three-wire circuit.
の長辺部で衝合させた部分に、上記Ｒ相コイル及びＴ相
コイルを巻きつけた請求項１記載の単相３線式低圧配線
回路における分電変圧器。2. The single-phase three-wire according to claim 1, wherein two iron core members are provided, and the R-phase coil and the T-phase coil are wound around a portion where the long side portions of the iron core members abut against each other. Distribution transformer in low-voltage wiring circuit.
部材の長辺部にＲ相コイルを、もう一方の鉄心部材の長
辺部にＴ相コイルを夫々巻きつけるとともに、２つの鉄
心部材の間に中性線を配することができるようにした請
求項１記載の単相３線式低圧配線回路における分電変圧
器。3. An iron core member is provided with two coils, an R-phase coil is wound around a long side of one iron core member, and a T-phase coil is wound around a long side of another iron core member. The distribution transformer in the single-phase three-wire low-voltage wiring circuit according to claim 1, wherein a neutral wire can be arranged between the members.
なるバランサコイル及び直列コイルにおいて、該バラン
サコイルと該直列コイルのＲ相コイル同士及びＴ相コイ
ル同士、並びに該バランサコイルのＲ相コイルとＴ相コ
イルとを夫々直列に接続するとともに、該バランサコイ
ルのＲ相コイル及びＴ相コイルと負荷とが並列に接続さ
れることができるようにした請求項１乃至３記載のいず
れかの単相３線式低圧配線回路における分電変圧器。4. A balancer coil and a series coil comprising the R-phase coil and the T-phase coil, wherein the balancer coil and the R-phase coils of the series coil, the T-phase coils, and the R-phase coil of the balancer coil. The R-phase coil and the T-phase coil of the balancer coil and the load can be connected in parallel while connecting the T-phase coil and the T-phase coil in series, respectively. Distribution transformer in a three-phase low-voltage wiring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997000258U JP3039434U (en) | 1997-01-10 | 1997-01-10 | Distribution transformer in single-phase three-wire low-voltage distribution circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1997000258U JP3039434U (en) | 1997-01-10 | 1997-01-10 | Distribution transformer in single-phase three-wire low-voltage distribution circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3039434U true JP3039434U (en) | 1997-07-22 |
Family
ID=43174068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1997000258U Expired - Lifetime JP3039434U (en) | 1997-01-10 | 1997-01-10 | Distribution transformer in single-phase three-wire low-voltage distribution circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3039434U (en) |
-
1997
- 1997-01-10 JP JP1997000258U patent/JP3039434U/en not_active Expired - Lifetime
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