JP5896371B2 - Three-phase electromagnetic equipment - Google Patents
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この発明は、三相形のリアクタンスを可変できる電磁機器に関する。特に、高調波歪みが少なく、鉄心の突き合わせ面にギャップを必要としない、リアクタンスの可変範囲が広い三相バランスの優れた三相電磁機器に関する。 The present invention relates to an electromagnetic device capable of varying a three-phase reactance. In particular, the present invention relates to a three-phase electromagnetic device having excellent three-phase balance with a wide variable range of reactance, which has less harmonic distortion and does not require a gap on the abutting surface of an iron core.
リアクタンスを可変できる従来の技術としては、本出願人が先に提案した三相形電磁機器(特許文献1)や三相電磁機器(特許文献2)がある。 Conventional techniques that can vary reactance include a three-phase electromagnetic device (Patent Document 1) and a three-phase electromagnetic device (Patent Document 2) previously proposed by the present applicant.
図11は、本出願人が先に提案した三相形電磁機器の一例を説明するための接続図である。この三相形電磁機器は、各端が対をなす磁路を形成する3つのH状脚部44a〜44cと、これらH状脚部の各端側を連結して閉磁路を形成する2つの枠部45a,45bとから成る三相電磁路を有し、H状脚部の一方の連結端側には、各磁路に三相交流電源の各相に対応する主巻線41aa〜41cbを巻装して有し、他方の連結端側には、各磁路に制御巻線42aa〜42cbを巻装して有する。主巻線は前記一対の磁路に生じる主磁束が同一方向になるように直列又は並列に接続し、前記制御巻線は前記主磁束によって生じる誘起電圧が互いに打消されるように直列に接続し、主磁束と制御磁束の共通磁路の磁気抵抗を制御し主巻線のリアクタンスを連続的に可変する。
FIG. 11 is a connection diagram for explaining an example of a three-phase electromagnetic device previously proposed by the present applicant. This three-phase electromagnetic device includes three H-
図12は、本出願人が先に提案した三相電磁機器の一例を説明するための接続図である。この三相電磁機器は、6つの直線磁心53aa〜53cbを、隣接する直線磁心との角度が60゜となるように配置し、さらに6つの直線磁心の一端を6つの鉄心窓部が形成されるように連結磁心53dで連結する。 FIG. 12 is a connection diagram for explaining an example of the three-phase electromagnetic device previously proposed by the present applicant. In this three-phase electromagnetic device, six linear magnetic cores 53aa to 53cb are arranged so that an angle with an adjacent linear magnetic core is 60 °, and six iron core window portions are formed at one end of the six linear magnetic cores. As shown in FIG.
6つの直線磁心53aa〜53cbには3対の主巻線51aa〜51cbを巻装し、それぞれの対の主巻線から生じる磁束が同一方向になるように直列又は並列に接続する。
直線磁心を連結した6個の連結磁心53dには、それぞれに制御巻線52a〜52fを巻装し、主巻線による磁束で制御巻線52a〜52fに生じる誘起電圧が互いに打消されるように制御巻線を直列又は並列に接続し、主磁束と制御磁束の共通磁路の磁気抵抗を制御し主巻線のリアクタンスを連続的に可変する。
Three pairs of main windings 51aa to 51cb are wound around the six linear magnetic cores 53aa to 53cb, and are connected in series or in parallel so that the magnetic flux generated from each pair of main windings is in the same direction.
しかし、特許文献1の三相形電磁機器については、主磁束と制御磁束の共通磁路の磁気抵抗を制御し、主巻線のリアクタンスを連続的に可変することが可能であるものの、リアクタンスの可変範囲が狭く、リアクタンス制御時に三相間のアンバランスが生ずる傾向が見られた。
However, the three-phase electromagnetic device of
その原因としては、主磁束と制御磁束の共通磁路の磁気抵抗の調整範囲が狭いこと、制御中央脚部に巻装した主巻線による主磁路の磁気抵抗と外側脚部に巻装した主巻線による主磁路の磁気抵抗が異なることが考えられた。 The reason is that the adjustment range of the magnetic resistance of the common magnetic path of the main magnetic flux and the control magnetic flux is narrow, the magnetic resistance of the main magnetic path by the main winding wound around the control central leg and the outer leg is wound around It was thought that the magnetic resistance of the main magnetic path by the main winding was different.
また、特許文献2の三相電磁機器については、主磁束と制御磁束の共通磁路の磁気抵抗を制御し、主巻線のリアクタンスを連続的に可変することが可能であるものの、一つの鉄心窓部に3個の主巻線乃至制御巻線が巻装されることから、巻線の占積率が低下してしまう。
In addition, the three-phase electromagnetic device disclosed in
制御巻線を連結磁心へ巻装する必要があるため、磁心構成した後に手動による巻装を行う必要がある。 Since it is necessary to wind the control winding around the connecting magnetic core, manual winding is required after the magnetic core is configured.
さらに、リアクタンスを可変するための主磁束と制御磁束の共通磁路は主に制御巻線が巻装される窓周辺部の磁路であり、磁気抵抗の調整範囲が狭いためリアクタンスの可変範囲も広くない。 Furthermore, the common magnetic path of the main magnetic flux and the control magnetic flux for varying the reactance is mainly the magnetic path around the window around which the control winding is wound, and since the adjustment range of the magnetic resistance is narrow, the variable range of the reactance is also Not wide.
そこで、本発明は、上記課題に鑑み、三相間のアンバランスがなく、鉄心の突き合わせ面にギャップを必要とせずに、リアクタンスの可変範囲が広く、さらに、巻線の巻装構造が簡単で組立が簡単な三相一体構造のリアクタンスを可変できる三相電磁機器を提供することを目的とする。 Therefore, in view of the above problems, the present invention has no unbalance between the three phases, does not require a gap in the abutting surface of the iron core, has a wide variable range of reactance, and has a simple winding structure for winding. An object of the present invention is to provide a three-phase electromagnetic device capable of changing the reactance of a simple three-phase integrated structure.
本発明は、以下の技術手段により上記課題を達成する。
隣接する直線磁心との角度が略20°となるように放射状に配置された18個の前記直線磁心と、各前記直線磁心の各中心端部と各周辺端部をそれぞれ連結する連結磁心とを備えた18脚磁心と、前記直線磁心に2脚置きに卷装された6つの交流主巻線と、該交流主巻線を巻装した直線磁心の間に位置する前記直線磁心に卷装された直流制御巻線を有し、
前記6つの交流主巻線のうち、それぞれ2つの隣り合う前記交流主巻線または略直線状に配置される2つの前記交流主巻線からなる3組の前記交流主巻線が、三相交流の各相の交流主巻線となるように接続されており、前記各相の交流主巻線に三相交流電流を流すことによって前記各直流制御巻線に誘起する起電力が打ち消されるように各前記直流制御巻線が直列又は直並列に接続されており、直列接続した前記直流制御巻線に直流制御電流を供給して制御磁束を発生させ、前記交流主巻線の電流により生じる主磁束と前記制御磁束の共通磁路の磁気抵抗を制御し前記交流主巻線のリアクタンスを連続的に可変する三相電磁機器を特徴とする。
The present invention achieves the above object by the following technical means.
18 and the straight magnetic core angle between straight magnetic core arranged radially so as to be substantially 20 ° to the adjacent, a connecting core connecting each of the center end and each peripheral edge of each of said linear core and 18 leg magnetic core having, being卷装 to said linear core positioned between said straight line and six AC main windings卷装 every two legs in the magnetic core, straight magnetic core wound the AC main winding has a DC control winding,
Among the six AC main windings, three sets of the AC main windings each consisting of two adjacent AC main windings or two AC main windings arranged in a substantially straight line form three-phase AC So that the electromotive force induced in each DC control winding is canceled by flowing a three-phase AC current through the AC main winding of each phase. each said DC control winding are connected in series or series-parallel, to generate a control flux by supplying a DC control current to the DC control winding connected in series, the main magnetic flux generated by a current of the AC main winding wherein the three-phase electromagnetic device continuously variably to the reactance of controlling the magnetic resistance of the common magnetic path the AC main winding of the control magnetic flux and.
さらに、各相の前記交流主巻線を卷装した2つの前記直線磁心に生じる交流主磁束の向きは前記直線磁心の中心方向に対して互いに反対方向であることを特徴とする。 Furthermore, the orientation of the alternating main magnetic flux generated in two of the linear core that卷装the AC main winding of each phase is characterized by in the opposite direction to each other with respect to the center direction of the linear core.
さらに、各相の前記交流主巻線を卷装した2つの前記直線磁心に生じる交流主磁束の向きは前記直線磁心の中心方向に対して互いに同方向であることを特徴とする。 Further, the AC main magnetic flux direction generated in two of the linear core that卷装the AC main winding of each phase, characterized in that with respect to the center direction of the linear core which is the same direction.
さらにまた、各相の前記交流主巻線を巻装した前記直線磁心に二次巻線が卷装され、変圧器機能を有することを特徴とする。 Furthermore, the secondary winding to the straight magnetic core wound with the AC main winding of each phase is卷装, characterized in that it has a transformer function.
本発明によれば、タップを設けることもなく、鉄心の突き合わせ面にギャップを必要とせず、組み立てが簡単な構成で低コスト化が期待でき、広範囲にリアクタンスを可変する三相バランスの優れた三相電磁機器を実現することができる。 According to the present invention, there is no need to provide a tap, no gap is required in the abutting surface of the iron core, a low cost can be expected with a simple assembly structure, and a three-phase balance excellent in three-phase balance that can vary reactance over a wide range. A phase electromagnetic device can be realized.
本発明を電力系統に使用することにより、近年の電力需要の増大や負荷の多様化により、電力系統の電圧の変動等に対応できるフレキシブルな電力設備の提供がはかられ、電力系統の電圧安定化や力率及び潮流のより適切な制御に寄与できる。 By using the present invention in a power system, it is possible to provide flexible power equipment that can cope with fluctuations in the voltage of the power system, etc., due to the recent increase in power demand and diversification of loads. Can contribute to more appropriate control of power generation and power factor.
図1は、本発明による三相電磁機器の磁心及び巻線の基本構成例を示す接続図、図2は、本発明の三相電磁機器を等価的に回路表示した回路構成を示す図、図3は、図1で示した三相電磁機器の構成例を説明するための図である。本発明の基本構成を以下に説明する。 FIG. 1 is a connection diagram showing a basic configuration example of a magnetic core and windings of a three-phase electromagnetic device according to the present invention, and FIG. 2 is a diagram showing a circuit configuration equivalently displaying a circuit of the three-phase electromagnetic device of the present invention. 3 is a diagram for explaining a configuration example of the three-phase electromagnetic device shown in FIG. The basic configuration of the present invention will be described below.
本三相電磁機器を構成する磁心は、図3の如く、18個の直線磁心3aa、3ab、3ba、3bb、3ca、3cb、3da、3db、3dc、3dd、3de、3df、3dg、3dh、3di、3dj、3dk及び3dLを、隣接する直線磁心との角度が略20゜となるように放射状に配置する。さらに、前記18個の直線磁心の中心側(内側)端部及び周辺側(外側)端部を、18個の鉄心窓部が形成されるように連結磁心3eおよび3fで連結する。なお、18個の直線磁心3aa、3ab、3ba、3bb、3ca、3cb、3da、3db、3dc、3dd、3de、3df、3dg、3dh、3di、3dj、3dk及び3dLと、連結磁心3eおよび3fの接合部は、磁気的ギャップではないので、磁心を構成する各々の積層鋼板を平行になるように突き合わせて、或いは積層鋼板の端部を噛み合わせて連結するように構成する。
As shown in FIG. 3, the magnetic cores constituting the three-phase electromagnetic device are 18 linear magnetic cores 3aa, 3ab, 3ba, 3bb, 3ca, 3cb, 3da, 3db, 3dc, 3dd, 3de, 3df, 3dh, 3dh, 3di. 3dj, 3dk, and 3dL are arranged radially so that the angle between adjacent linear magnetic cores is approximately 20 °. Further, the center side (inner side) end portion and the peripheral side (outer side) end portion of the 18 linear magnetic cores are connected by connecting
前記18個の直線磁心のうち、直線磁心の角度が略60゜となる6つの直線磁心3aa、3ab、3ba、3bb、3ca及び3cbに交流主巻線(以下主巻線と言う。)を巻装する。 Among the 18 linear magnetic cores, AC main windings (hereinafter referred to as main windings) are wound around six linear magnetic cores 3aa, 3ab, 3ba, 3bb, 3ca and 3cb having an angle of the linear magnetic core of approximately 60 °. Disguise.
第1の直線磁心3aaには主巻線1aaを、直線磁心3aaと同一軸上に配置された第2の直線磁心3abには主巻線1abを巻装する。主巻線1aa及び1abを、両主巻線から生じる磁束φa1及びφa2が同一方向になるように直列又は並列に接続する。 The main winding 1aa is wound around the first linear magnetic core 3aa, and the main winding 1ab is wound around the second linear magnetic core 3ab arranged on the same axis as the linear magnetic core 3aa. The main windings 1aa and 1ab are connected in series or in parallel so that the magnetic fluxes φa1 and φa2 generated from both main windings are in the same direction.
同様に、第3の直線磁心3baには主巻線1baを、直線磁心3baと同一軸上に配置された第4の直線磁心3bbには主巻線1bbを巻装し、第5の直線磁心3caには主巻線1caを、直線磁心3caと同一軸上に配置された第6の直線磁心3cbには主巻線1cbを巻装する。 Similarly, the main winding 1ba is wound around the third linear magnetic core 3ba, and the main winding 1bb is wound around the fourth linear magnetic core 3bb arranged on the same axis as the linear magnetic core 3ba, so that the fifth linear magnetic core is wound. The main winding 1ca is wound around 3ca, and the main winding 1cb is wound around the sixth linear magnetic core 3cb arranged on the same axis as the linear magnetic core 3ca.
主巻線1ba及び1bb並びに主巻線1ca及び1cbは、両主巻線から生じる磁束φb1及びφb2並びに磁束φc1及びφc2が同一方向になるように直列又は並列に接続する。 The main windings 1ba and 1bb and the main windings 1ca and 1cb are connected in series or in parallel so that the magnetic fluxes φb1 and φb2 and the magnetic fluxes φc1 and φc2 generated from both main windings are in the same direction.
前記主巻線を巻装した直線磁心以外の12個の直線磁心3da、3db、3dc、3dd、3de、3df、3dg、3dh、3di、3dj、3dk及び3dLには、それぞれに直流制御巻線(以下制御巻線と言う。)2a、2b、2c、2d、2e、2f、2g、2h、2i、2j、2k及び2Lを巻装する。主巻線1aa及び1ab、並びに主巻線1ba及び1bb、並びに主巻線1ca及び1cbによる磁束で制御巻線2a、2b、2c、2d、2e、2f、2g、2h、2i、2j、2k及び2Lに生じる誘起電圧が互いに打消されるように各制御巻線を直列又は直並列に接続し、その開放端子側に制御回路4を接続する。
12 linear magnetic cores 3da, 3db, 3dc, 3dd, 3de, 3df, 3dg, 3dh, 3di, 3dj, 3dk, and 3dL other than the linear magnetic core around which the main winding is wound are each provided with a DC control winding ( Hereinafter referred to as a control winding.) 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, and 2L are wound.
各制御巻線にはそれぞれ主巻線に流れる三相の各相の主電流により生じる主磁束によって誘起電圧が生じるが、三相各相の主磁束に対応して生じる誘起電圧は、対応する制御巻線を直列に接続することにより打ち消される。 In each control winding, an induced voltage is generated by the main magnetic flux generated by the main current of each of the three phases flowing in the main winding, but the induced voltage corresponding to the main magnetic flux of each of the three phases is controlled by the corresponding control. It is canceled out by connecting the windings in series.
それ故、図において、制御巻線を全て直列に接続することも可能であるし、対称的に半分ずつ制御巻線を直列接続し、それらを並列に直並列に接続することもできる。 Therefore, in the figure, it is possible to connect all the control windings in series, or symmetrically connect the control windings in half and connect them in series and parallel.
図において、直線磁心に巻装して接続した主巻線の開放端子に三相交流電源を接続し、それぞれの主巻線に図示矢印方向の電流ILu、ILv、ILwが流れているとする。なお、図示の電流矢印方向を正サイクルとした場合、負サイクルでは逆方向の電流が流れる。 In the figure, it is assumed that a three-phase AC power source is connected to an open terminal of a main winding that is wound and connected to a linear magnetic core, and currents ILu, ILv, and ILw in the directions indicated by the arrows flow through the respective main windings. When the current arrow direction shown in the figure is a positive cycle, a current in the reverse direction flows in the negative cycle.
上記構成の三相電磁機器は、主巻線1aa及び1ab、主巻線1ba及び1bb、主巻線1ca及び1cbより発生する各相各々の交流磁束は、直線磁心を連結した連結磁心部を介して還流する。 In the three-phase electromagnetic device having the above-described configuration, the AC magnetic flux of each phase generated from the main windings 1aa and 1ab, the main windings 1ba and 1bb, and the main windings 1ca and 1cb passes through the connecting magnetic core portion connecting the linear magnetic cores. Reflux.
以下、主巻線1aaを巻装した第1の直線磁心部3aaと主巻線1abを巻装した第2の直線磁心部3abに着目して説明する。 Hereinafter, description will be made by paying attention to the first linear magnetic core portion 3aa around which the main winding 1aa is wound and the second linear magnetic core portion 3ab around which the main winding 1ab is wound.
電流ILuが流れると、磁路には主巻線1aaにより主磁束φa1、並びに主巻線1abにより主磁束φa2がそれぞれ発生する。 When current ILu flows, main magnetic flux φa1 and main magnetic flux φa2 are generated in the magnetic path by main winding 1aa and main winding 1ab, respectively.
発生した主磁束φa1は、制御巻線を巻装した直線磁心部3da、3dLを通過し、主巻線1aaには巻数と磁心の磁気抵抗に応じたリアクタンスが生ずる。 The generated main magnetic flux φa1 passes through the linear magnetic core portions 3da and 3dL around which the control winding is wound, and reactance according to the number of turns and the magnetic resistance of the magnetic core is generated in the main winding 1aa.
同様に主磁束φa2も、直線磁心部3dg、3dfを通過し、主巻線1abにも巻数と磁心の磁気抵抗に応じたリアクタンスが生ずる。 Similarly, the main magnetic flux φa2 passes through the linear magnetic core portions 3dg and 3df, and reactance corresponding to the number of turns and the magnetic resistance of the magnetic core is generated in the main winding 1ab.
ここで、制御巻線を巻装した直線磁心部3da、3dLは制御磁束φdcと主磁束φa1との共通磁路となる。同様に、直線磁心部3dg、3dfは制御磁束φdcと主磁束φa2との共通磁路となる。 Here, the linear magnetic cores 3da and 3dL around which the control winding is wound serve as a common magnetic path for the control magnetic flux φdc and the main magnetic flux φa1. Similarly, the linear magnetic core portions 3dg and 3df serve as a common magnetic path for the control magnetic flux φdc and the main magnetic flux φa2.
以上のことは、主巻線1baを巻装した直線磁心部3baと主巻線1bbを巻装した直線磁心部3bb、同主巻線1caを巻装した直線磁心部3caと主巻線1cbを巻装した直線磁心部3cbに着目した場合も同様である。すなわち、主巻線を巻装した直線磁心部の両隣りの直線磁心部がそれぞれ制御磁束φdcと主巻線により生じる各主磁束(φa1、φa2、φb1、φb2、φc1、φc2)との共通磁路となる。 As described above, the linear magnetic core portion 3ba around which the main winding 1ba is wound, the linear magnetic core portion 3bb around which the main winding 1bb is wound, the linear magnetic core portion 3ca around which the main winding 1ca is wound, and the main winding 1cb. The same applies to the case where attention is paid to the wound linear magnetic core portion 3cb. That is, the linear magnetic cores adjacent to both sides of the linear magnetic core portion around which the main winding is wound are respectively shared by the control magnetic flux φdc and the main magnetic fluxes (φa1, φa2, φb1, φb2, φc1, φc2) generated by the main winding. It becomes a road.
主巻線電流ILuを流した状態で制御巻線に直流制御電流Icを流すと、制御巻線2a、2b、2c、2d、2e、2f、2g、2h、2i、2j、2k及び2Lにおいて、制御巻線の巻数と制御電流Icの積で表される起磁力が発生することで、制御巻線磁束φdcと主磁束φa1及びφa2が同方向となる共通磁路部分の磁束密度が大となって透磁率が変化し、主磁束が制御されリアクタンスが低下する。
When a DC control current Ic is passed through the control winding in a state where the main winding current ILu is passed, in the
このことは、他の直線磁心部についても同様に成り立つことから、リアクタンスを可変できる三相電磁機器として動作することができる。 Since this holds true for the other linear magnetic cores as well, it can operate as a three-phase electromagnetic device whose reactance can be varied.
以上のように本発明の磁気回路構成は、磁心の構成、主巻線・制御巻線の巻装構成が三相各相について対称的であり、三相各相での可変リアクタンスの特性のバランスが優れた三相電磁機器が実現できる。 As described above, in the magnetic circuit configuration of the present invention, the configuration of the magnetic core and the winding configuration of the main winding and the control winding are symmetrical for each of the three phases, and the balance of the variable reactance characteristics in each of the three phases. Can realize excellent three-phase electromagnetic equipment.
また、透磁率を変化させ、主磁束を制御しリアクタンスを可変するための主磁束と制御磁束の共通磁路が主巻線を巻装した各直線磁路に対応してそれぞれに2脚設けられており、当該磁路の磁気抵抗を広範囲に変化させることにより、従来の構造に比し、リアクタンスを広範囲に可変することができる。 In addition, a common magnetic path of the main magnetic flux and the control magnetic flux for changing the permeability, controlling the main magnetic flux and varying the reactance is provided for each linear magnetic path around which the main winding is wound. By changing the magnetic resistance of the magnetic path over a wide range, the reactance can be varied over a wide range as compared with the conventional structure.
図4は、本三相電磁機器の構成例を示したもので、図4(a)は前述の如く直線磁心を連結する連結磁心形状が円形状を成すものであり、電動機などで使用される打ち抜き鉄心のほか積鉄心で簡単に構成することができる。図4(b)及び図4(c)は直線磁心を連結する連結磁心形状が直線状を成すものであり、打ち抜き鉄心のほか積鉄心で簡単に構成することができる。なお、連結磁心は、構成が同等成であれば、様々な形状が可能である。 FIG. 4 shows an example of the configuration of this three-phase electromagnetic device, and FIG. 4 (a) shows that the connecting magnetic cores connecting the linear magnetic cores form a circular shape as described above, and are used in an electric motor or the like. It can be easily configured with a punched iron core or a stacked iron core. 4 (b) and 4 (c), the shape of the connecting magnetic cores connecting the linear magnetic cores is a straight line, and can be easily constituted by a stacked iron core in addition to the punched iron core. The connecting magnetic core can have various shapes as long as the configuration is equivalent.
図5は本三相電磁機器の組立例を示したもので、積鉄心構造で構成した直線磁心部に、主巻線1及び制御巻線2を填め込んだ後、外側の連結磁心を組立てて構成したものであり、組立てが簡単で巻線の占積率を向上させ、電磁機器の軽量化を図ることができる。 FIG. 5 shows an example of assembling the three-phase electromagnetic device. After the main winding 1 and the control winding 2 are inserted into the linear magnetic core portion having a stacked core structure, the outer connecting magnetic core is assembled. Since it is configured, it is easy to assemble, improve the space factor of the winding, and reduce the weight of the electromagnetic device.
図6は、本発明による三相電磁機器の、他の巻線構成例を示す接続図であり、三相電磁機器を構成する18個の直線磁心のうち、6つの直線磁心3aa、3ab、3ba、3bb、3ca及び3cbを、各相の対を構成する直線磁心3aa及び3ab、3ba及び3bb、3ca及び3cbがそれぞれ略60゜を成すように、主巻線1aa及び1ab、1ba及び1bb、1ca及び1cbを配置したものである。 FIG. 6 is a connection diagram showing another winding configuration example of the three-phase electromagnetic device according to the present invention. Of the 18 linear magnetic cores constituting the three-phase electromagnetic device, six linear magnetic cores 3aa, 3ab, 3ba are shown. 3bb, 3ca and 3cb are connected to the main windings 1aa and 1ab, 1ba and 1bb, 1ca so that the linear magnetic cores 3aa and 3ab, 3ba and 3bb, 3ca and 3cb constituting each phase pair form approximately 60 °, respectively. And 1cb.
前述と同様に、制御巻線磁束と主磁束が同方向となる共通磁路部分の磁束密度が大となって透磁率が変化し、主磁束が制御され、リアクタンスを可変できる三相電磁機器として機能することができる。 Similar to the above, the magnetic flux density of the common magnetic path part where the control winding magnetic flux and the main magnetic flux are in the same direction increases, the permeability changes, the main magnetic flux is controlled, and the reactance can be varied. Can function.
図6に示した例は、図1、図3に示した例に対し、三相の各相の主巻線を構成する対となる直線磁路に巻装される交流主巻線の配置の変形であるが、次に示す図7の例は、三相各相の対となる直線磁心に巻装される主巻線の巻装構成の変形である。 The example shown in FIG. 6 is different from the examples shown in FIGS. 1 and 3 in the arrangement of the AC main windings wound around the pair of linear magnetic paths constituting the main windings of the three phases. Although it is a modification, the example of FIG. 7 shown next is a modification of the winding configuration of the main winding wound around the linear magnetic core that is a pair of three phases.
図7は、図1、図3に示した例に対する変形であるが、図6に示した例にも適用できることは明らかである。 FIG. 7 is a modification of the example shown in FIGS. 1 and 3, but it is obvious that the example can also be applied to the example shown in FIG.
図1、図3に示した例との相違は、各相の対になる主巻線によって直線磁心に生じる主磁束の方向が直線磁心の中心方向に対して互いに反対方向であるのに対し、図7に示す例は、対になる主巻線によって直線磁心に生じる主磁束の方向が直線磁心の中心方向に対して互いに同方向であり、互いに対向している点である。 The difference from the example shown in FIG. 1 and FIG. 3 is that the directions of main magnetic fluxes generated in the linear magnetic core by the main windings of each phase pair are opposite to each other with respect to the central direction of the linear magnetic core. The example shown in FIG. 7 is that the directions of the main magnetic flux generated in the linear magnetic core by the pair of main windings are the same as each other with respect to the central direction of the linear magnetic core, and are opposed to each other.
この構成は、対称的な18脚磁心構成において、各脚の直線磁心に対する巻線の巻装構造が制御巻線、主巻線を含めて対称性が確保され、リアクタンスの可変特性の三相バランスの更なる改善と共に歪特性の改善にも資するものである。 In this configuration, in a symmetrical 18-leg magnetic core configuration, the winding structure for the straight magnetic core of each leg includes the control winding and the main winding, and symmetry is ensured. This contributes to further improvement of the distortion characteristics as well as improvement of the above.
図8は、本発明による三相電磁機器に三相交流電圧を印加し、直流制御電流Icを増加させた場合の制御特性例を示したものである。 FIG. 8 shows an example of control characteristics when a three-phase AC voltage is applied to the three-phase electromagnetic device according to the present invention to increase the DC control current Ic.
図8(a)は、主巻線電流の制御特性例を示したものであり、直流制御電流Icを増加させることにより、リアクタンスが変化し、主巻線電流を線形に可変できることがわかる。 FIG. 8A shows an example of the control characteristics of the main winding current. It can be seen that the reactance changes and the main winding current can be varied linearly by increasing the DC control current Ic.
図8(b)は、主巻線電流の電流歪み特性例を示したものであり、直流制御電流Icによらず良好な主巻線電流歪みであることがわかる。
また、上記の制御特性は三相各相で測定誤差の範囲で一致している。
FIG. 8B shows an example of current distortion characteristics of the main winding current, and it can be seen that the main winding current distortion is good regardless of the DC control current Ic.
Further, the above control characteristics coincide with each other in the range of measurement error in each of the three phases.
以上のように、本発明によると、直流制御電流を調整することにより三相各相のリアクタンスを高速且つ連続的に可変することができる。 As described above, according to the present invention, the reactance of each of the three phases can be varied at high speed and continuously by adjusting the DC control current.
図9は、前記図1で示した磁心巻線構成において、電磁機器を構成する主巻線部を一次巻線とし、一次巻線5aaを巻装した直線磁心に二次巻線6aa、一次巻線5abを巻装した直線磁心に二次巻線6ab、一次巻線5baを巻装した直線磁心に二次巻線6ba、一次巻線5bbを巻装した直線磁心に二次巻線6bb、一次巻線5caを巻装した直線磁心に二次巻線6ca、一次巻線5cbを巻装した直線磁心に二次巻線6cbを巻装して一次巻線と同様に接続して構成した変圧器機能を有した三相電磁機器である。 FIG. 9 shows the configuration of the magnetic core winding shown in FIG. 1, in which the main winding constituting the electromagnetic device is a primary winding, and the secondary winding 6aa and the primary winding are wound around a linear magnetic core wound with the primary winding 5aa. The secondary winding 6ab is wound around the linear magnetic core wound with the wire 5ab, the secondary winding 6ba is wound around the linear magnetic core wound around the primary winding 5ba, the secondary winding 6bb is wound around the linear magnetic core wound with the primary winding 5bb, and the primary winding. A transformer formed by winding a secondary winding 6ca on a linear magnetic core wound with a winding 5ca and connecting a secondary winding 6cb on a linear magnetic core wound with a primary winding 5cb and connecting them in the same manner as the primary winding. It is a three-phase electromagnetic device with functions.
図9において、一次巻線に三相交流電源を接続し二次巻線には三相負荷を接続し、それぞれの二次巻線に図示矢印方向の電流ILu2、ILv2、ILw2が流れていたとする。
以下、一次巻線5aaを巻装した第1の直線磁心部と一次巻線5abを巻装した第2の直線磁心部について説明する。
In FIG. 9, it is assumed that a three-phase AC power source is connected to the primary winding and a three-phase load is connected to the secondary winding, and currents ILu2, ILv2, and ILw2 in the directions indicated by the arrows flow through the respective secondary windings. .
Hereinafter, the first linear magnetic core portion wound with the primary winding 5aa and the second linear magnetic core portion wound with the primary winding 5ab will be described.
制御電流を流さない場合には、一次巻線5aa及び5abには、上記二次電流で発生した磁束を打消すように一次電流ILu1が流れ、全体として変圧器動作を示す。 When the control current is not passed, the primary current ILu1 flows through the primary windings 5aa and 5ab so as to cancel the magnetic flux generated by the secondary current, and the transformer operation is shown as a whole.
制御巻線に直流制御電流Icを流すと、制御巻線の巻数と制御電流Icの積で表される起磁力が発生することで共通磁路の透磁率が変化し、主磁束が制御される。このため、一次巻線には制御電流の制御に伴う主磁束の減少に応じて、一次巻線の端子間電圧を維持するために必要な主磁束を発生させるために励磁電流が増加する。 When a DC control current Ic is passed through the control winding, a magnetomotive force represented by the product of the number of turns of the control winding and the control current Ic is generated, thereby changing the permeability of the common magnetic path and controlling the main magnetic flux. . For this reason, in accordance with the decrease in the main magnetic flux accompanying the control of the control current, the exciting current increases in order to generate the main magnetic flux necessary for maintaining the voltage between the terminals of the primary winding.
即ち、変圧器としての変圧機能に加えて、制御電流を調整することで主巻線のリアクタンスを連続的に可変して一次側に流入する無効電流の調整が可能となる。
このことは、同様に他の直線磁心部についても成り立つことから、変圧器としての機能に加えて、リアクタンスを可変できる三相電磁機器として構成することができる。
That is, in addition to the transformation function as a transformer, the reactive current flowing into the primary side can be adjusted by continuously adjusting the reactance of the main winding by adjusting the control current.
Since this holds true for other linear magnetic core portions as well, in addition to the function as a transformer, it can be configured as a three-phase electromagnetic device capable of varying reactance.
(適用例)
図10は、本発明の三相電磁機器の無効電力補償装置への適用例を示す等価回路である。
図10において、本発明による三相電磁機器と電力用コンデンサ7を並列に接続し、送電線路に並列に挿入し、電磁機器の制御により、系統に生じる遅相から進相の無効電力を連続的に補償するようにしたものである。
(Application example)
FIG. 10 is an equivalent circuit showing an application example of the present invention to a reactive power compensator for a three-phase electromagnetic device.
In FIG. 10, a three-phase electromagnetic device according to the present invention and a power capacitor 7 are connected in parallel and inserted in parallel to a transmission line, and the reactive power from the slow phase to the fast phase generated in the system is continuously controlled by controlling the electromagnetic device. Is to compensate.
以上詳述したように、本発明によれば、タップを設けることなく、制御巻線を連結磁心へ巻装する必要のないので、組立が簡単で、鉄心の突き合わせ面にギャップを必要とせずに、広範囲にリアクタンスを可変する三相バランスの優れた三相電磁機器を実現することができ、近年の電力需要の増大や負荷の多様化により、系統電圧の変動等負荷の多様化に対応できるフレキシブルな電力設備の提供がはかられ、電力系統の電圧安定化や力率及び潮流のより適切な制御に寄与できる。 As described above in detail, according to the present invention, since it is not necessary to wind the control winding around the connecting magnetic core without providing a tap, the assembly is simple and a gap is not required on the butt surface of the iron core. A three-phase electromagnetic device with excellent three-phase balance that can vary reactance over a wide range can be realized, and the recent increase in power demand and the diversification of loads can flexibly cope with the diversification of loads such as system voltage fluctuations. Provision of power facilities can contribute to the stabilization of power system voltage and more appropriate control of power factor and power flow.
なお、この他、発明の要旨を逸脱しない範囲で種々変形して実施することができる。 In addition, various modifications can be made without departing from the scope of the invention.
1(1aa,1ab,1ba,1bb,1ca,1cb)…主巻線、2(2a,2b,2c,2d,2e,2f,2g,2h,2i,2j,2k,2L)…制御巻線、3(3aa,3ab,3ba,3bb,3ca,3cb,3da,3db,3dc,3dd,3de,3df,3dg,3dh,3di,3dj,3dk,3dL,3e,3f)…磁心、φa1,φa2,φb1,φb2,φc1,φc2…主磁束、φdc…制御磁束、4…制御回路、5(5aa,5ab,5ba,5bb,5ca,5cb)…一次巻線、6(6aa,6ab,6ba,6bb,6ca,6cb)…二次巻線、7…電力用コンデンサ。 1 (1aa, 1ab, 1ba, 1bb, 1ca, 1cb) ... main winding, 2 (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2L) ... control winding, 3 (3aa, 3ab, 3ba, 3bb, 3ca, 3cb, 3da, 3db, 3dc, 3dd, 3de, 3df, 3dg, 3dh, 3di, 3dj, 3dk, 3dL, 3e, 3f) ... magnetic core, φa1, φa2, φb1 , Φb2, φc1, φc2 ... main magnetic flux, φdc ... control magnetic flux, 4 ... control circuit, 5 (5aa, 5ab, 5ba, 5bb, 5ca, 5cb) ... primary winding, 6 (6aa, 6ab, 6ba, 6bb, 6ca 6cb) ... secondary winding, 7 ... power capacitor.
Claims (4)
前記直線磁心に2脚置きに卷装された6つの交流主巻線と、該交流主巻線を巻装した直線磁心の間に位置する前記直線磁心に卷装された直流制御巻線を有し、
前記6つの交流主巻線のうち、それぞれ2つの隣り合う前記交流主巻線または略直線状に配置される2つの前記交流主巻線からなる3組の前記交流主巻線が、三相交流の各相の交流主巻線となるように接続されており、
前記各相の交流主巻線に三相交流電流を流すことによって前記各直流制御巻線に誘起する起電力が打ち消されるように各前記直流制御巻線が直列又は直並列に接続されており、
直列接続した前記直流制御巻線に直流制御電流を供給して制御磁束を発生させ、前記交流主巻線の電流により生じる主磁束と前記制御磁束の共通磁路の磁気抵抗を制御し前記交流主巻線のリアクタンスを連続的に可変することを特徴とする三相電磁機器。 18 and the straight magnetic core angle between straight magnetic core arranged radially so as to be substantially 20 ° to the adjacent, a connecting core connecting each of the center end and each peripheral edge of each of said linear core and 18-leg magnetic core which includes,
Yes six AC main windings卷装 every two legs in the straight magnetic core, the DC control windings卷装 to said linear core located between the straight magnetic core wound with the AC main winding And
Among the six AC main windings, three sets of the AC main windings each consisting of two adjacent AC main windings or two AC main windings arranged in a substantially straight line form three-phase AC Are connected to become the AC main winding of each phase of
The phases of the AC main winding to a three-phase alternating currents each said DC control winding as electromotive force induced is canceled to the respective DC control winding by passing are connected in series or series-parallel,
To the DC control winding connected in series DC control current to supply to generate a control flux, a main magnetic flux and said control controlling said AC main magnetic resistance of the common magnetic path of the magnetic flux generated by a current of the AC main winding A three-phase electromagnetic device characterized by continuously changing the reactance of the winding.
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