JP5648577B2 - Vacuum interrupter - Google Patents

Vacuum interrupter Download PDF

Info

Publication number
JP5648577B2
JP5648577B2 JP2011110163A JP2011110163A JP5648577B2 JP 5648577 B2 JP5648577 B2 JP 5648577B2 JP 2011110163 A JP2011110163 A JP 2011110163A JP 2011110163 A JP2011110163 A JP 2011110163A JP 5648577 B2 JP5648577 B2 JP 5648577B2
Authority
JP
Japan
Prior art keywords
electrode
magnetic
magnetic body
shaped
arc
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.)
Active
Application number
JP2011110163A
Other languages
Japanese (ja)
Other versions
JP2012243444A (en
Inventor
松井芳彦
古畑高明
小松秀樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Original Assignee
Meidensha Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meidensha Corp filed Critical Meidensha Corp
Priority to JP2011110163A priority Critical patent/JP5648577B2/en
Publication of JP2012243444A publication Critical patent/JP2012243444A/en
Application granted granted Critical
Publication of JP5648577B2 publication Critical patent/JP5648577B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Description

本発明は、縦磁界発生用の手段として磁性体を設けた真空インタラプタに関する。   The present invention relates to a vacuum interrupter provided with a magnetic material as means for generating a longitudinal magnetic field.

従来より、遮断性能を上げるために、接点間に発生するアークに対して平行な磁界を発生させる、いわゆる縦磁界電極を組み込んだ真空インタラプタが採用されている。   Conventionally, in order to improve the interruption performance, a vacuum interrupter incorporating a so-called longitudinal magnetic field electrode that generates a magnetic field parallel to an arc generated between contacts has been employed.

この縦磁界電極は、一般的に、接点となる接触子の背面に設けたコイル電極やスリット入り電極に流れる電流により発生する磁界を利用している。一方、接点となる平板電極の背面に接続された通電軸に流れる電流により発生する磁界を、通電軸の周囲に設けた磁性体によって接点間に導くことにより、縦磁界を発生させる構成も知られている。   The longitudinal magnetic field electrode generally uses a magnetic field generated by a current flowing in a coil electrode or a slit electrode provided on the back surface of a contactor serving as a contact. On the other hand, a configuration is also known in which a longitudinal magnetic field is generated by guiding a magnetic field generated by a current flowing through a current-carrying shaft connected to the back surface of a plate electrode serving as a contact between magnetic contacts provided around the current-carrying shaft. ing.

このような磁性体を設ける構成として、図４に示すように、対向配置されるそれぞれの電極５０、５１の背面に馬蹄形（Ｕ字形）の磁性体５２、５３を設けたタイプの真空インタラプタが知られている。２つの磁性体５２、５３は通電軸の周囲を各々約１８０度超ずつ、例えば２００度程度覆うように形成されるとともに、互いを約１８０度ずらした位置に配置されている。磁性体５２、５３は２つ合わせて通電軸の周囲を３６０度以上覆う形となるため、磁性体５２、５３の端部同士は一部ラップするように配置される。このため磁性体ラップ箇所の磁気抵抗が下がり、磁力線が通過しやすくなっている。（例えば特許文献１参照。）   As a configuration in which such a magnetic body is provided, a vacuum interrupter of a type in which horseshoe-shaped (U-shaped) magnetic bodies 52 and 53 are provided on the back surfaces of the opposing electrodes 50 and 51 as shown in FIG. It has been. The two magnetic bodies 52 and 53 are formed so as to cover the circumference of the energizing shaft by more than about 180 degrees, for example, about 200 degrees, and are arranged at positions shifted from each other by about 180 degrees. Since the two magnetic bodies 52 and 53 together form a shape covering 360 degrees or more around the energizing shaft, the ends of the magnetic bodies 52 and 53 are arranged so as to partially wrap. For this reason, the magnetic resistance of the magnetic material wrap portion is lowered, and the lines of magnetic force are easily passed. (For example, refer to Patent Document 1.)

図５は図４の真空インタラプタの磁性体のみを取り出し、磁性体を通る磁力線により形成される磁気経路を示した図である。この図５に示すように、磁性体５２、５３を通過する磁力線Φ５４（以下「ループ」と称す。）が２回電極間（以下「ギャップ」と称する。）を通過する。ここでは磁性体５２、５３のラップ箇所を通過する磁力線を１本のループΦ５４で示しているが、実際にはループΦ５４の周囲には縦方向の磁束が発生している。このような構成によれば、ギャップには図６に模式的に示すように、磁束密度が一定以上の双極の範囲（点線部）が形成される。即ち、磁性体のラップ部であるため磁気抵抗が低く磁束密度が高くなっているループΦ５４の磁気経路Φ５４ａ、Φ５４ｂを中心として、その周囲に磁束密度が一定以上の略円状の範囲が２箇所形成される。ここで一定以上の磁束密度とは、遮断性能に寄与する程度の磁束密度を指す。   FIG. 5 is a view showing a magnetic path formed by magnetic lines of force passing through the magnetic body by taking out only the magnetic body of the vacuum interrupter of FIG. As shown in FIG. 5, a magnetic force line Φ54 (hereinafter referred to as “loop”) passing through the magnetic bodies 52 and 53 passes between the electrodes (hereinafter referred to as “gap”) twice. Here, the lines of magnetic force that pass through the wrap locations of the magnetic bodies 52 and 53 are indicated by one loop Φ54, but actually, a vertical magnetic flux is generated around the loop Φ54. According to such a configuration, as schematically shown in FIG. 6, a bipolar range (dotted line portion) having a certain magnetic flux density or more is formed in the gap. That is, there are two substantially circular ranges around the magnetic path Φ54a and Φ54b of the loop Φ54 having a low magnetic resistance and a high magnetic flux density because it is a wrap portion of a magnetic material, and around the magnetic path Φ54a and Φ54b. It is formed. Here, the magnetic flux density above a certain level refers to a magnetic flux density that contributes to the interruption performance.

さらに図７に示すように、対向配置される電極５５、５６のそれぞれの背面に２つずつ円弧形の磁性体５７、５８および５９、６０を設けた四重極タイプの真空インタラプタも知られている。電極５５の背面に設けられた磁性体５７、５８は通電軸の周囲を各々約９０度超、例えば１１０度程度覆うように形成されるとともに、互いに約１８０度ずらして配置されている。さらに、電極５６の背面には磁性体５７、５８と同一形状でかつこれらの磁性体とそれぞれ約９０度ずらした位置に、磁性体５９、６０を配置している。即ち磁性体５７、５９、６０の端部同士を一部ラップさせるように配置すると共に、磁性体５８、５９、６０端部同士もラップさせることで、それぞれのラップ箇所の磁気抵抗が下がり、磁力線が通過しやすくなっている。（例えば特許文献２参照。）   Further, as shown in FIG. 7, a quadrupole type vacuum interrupter is also known, in which two arc-shaped magnetic bodies 57, 58 and 59, 60 are provided on the back surfaces of the electrodes 55, 56 arranged opposite to each other. ing. The magnetic bodies 57 and 58 provided on the back surface of the electrode 55 are formed so as to cover the periphery of the current-carrying shaft by more than about 90 degrees, for example, about 110 degrees, and are shifted from each other by about 180 degrees. Further, magnetic bodies 59 and 60 are disposed on the back surface of the electrode 56 at positions that are the same shape as the magnetic bodies 57 and 58 and that are shifted from these magnetic bodies by about 90 degrees. That is, by arranging the end portions of the magnetic bodies 57, 59, and 60 so as to be partially wrapped, and also wrapping the end portions of the magnetic bodies 58, 59, and 60, the magnetic resistance at each lap location is lowered and the lines of magnetic force are reduced. Is easier to pass. (For example, refer to Patent Document 2.)

この構造においては図８に示すように、４つの磁性体を通過するループΦ６１が４回ギャップを通過する。具体的には、磁性体５７、５９、５８、６０の順にループΦ６１が通過する。ここでも磁力線は各々の磁性体のラップ箇所を通過する１本のループΦ６１で示しているが、実際にはループΦ６１の周囲には縦方向の磁束が発生している。このような構成によれば、ギャップには図９に模式的に示すように、磁束密度が一定以上の四重極の範囲（点線部）が形成される。即ち、磁性体のラップ部のため磁気抵抗が低く磁束密度が高くなっているループΦ６１の磁気経路Φ６１ａ、Φ６１ｂ、Φ６１ｃ、Φ６１ｄを中心として、その周囲に磁束密度が一定以上の略円状の範囲が４箇所形成される。   In this structure, as shown in FIG. 8, the loop Φ61 passing through the four magnetic bodies passes through the gap four times. Specifically, the loop Φ61 passes through the magnetic bodies 57, 59, 58, and 60 in this order. Here, the magnetic lines of force are shown by one loop Φ61 passing through the wrapping portions of the respective magnetic bodies, but in reality, a vertical magnetic flux is generated around the loop Φ61. According to such a configuration, as schematically shown in FIG. 9, a quadrupole range (dotted line portion) having a certain magnetic flux density or more is formed in the gap. That is, a substantially circular range in which the magnetic flux density is more than a fixed value around the magnetic path Φ61a, Φ61b, Φ61c, and Φ61d of the loop Φ61 where the magnetic resistance is low and the magnetic flux density is high because of the wrap portion of the magnetic body. Are formed in four places.

特開昭６０−２５８８１６JP 60-258816 ＥＰ１１１６３８Ａ２EP111638A2

縦磁界の効果を増加させ、遮断性能を向上するためには、電極径方向全体での磁束の密度分布が均一であること、磁界の強度が強いことが求められている。しかしながら、上述の馬蹄形タイプの真空インタラプタでは、１本のループあたり２箇所でギャップを通過するので、磁気抵抗の低下については抑えられる一方、電極上には磁束密度が一定以上の略円状の範囲が２つ形成されるのみである。このため、電極の径方向に対して均一な磁束密度分布が得られないという問題があった。   In order to increase the effect of the longitudinal magnetic field and improve the interruption performance, it is required that the magnetic flux density distribution is uniform throughout the electrode radial direction and that the magnetic field strength is strong. However, since the horseshoe-shaped vacuum interrupter described above passes through the gap at two locations per loop, it is possible to suppress a decrease in the magnetic resistance, but on the electrode, a substantially circular range in which the magnetic flux density is a certain level or more. Only two are formed. For this reason, there has been a problem that a uniform magnetic flux density distribution cannot be obtained in the radial direction of the electrode.

また、四重極タイプの真空インタラプタでは、１本のループあたり４回ギャップを通過することで、電極上には磁束密度分布が一定以上の略円状の範囲が４つ形成され、馬蹄形タイプに比べて電極全体への磁束密度の分布は改善される。しかし、電極上で隣り合う磁気経路Φ６１ａ、Φ６１ｂ、Φ６１ｃ、Φ６１ｄは互いに磁力線の進行方向が異なるため、各磁気経路の周囲には各々独立し、且つ磁束密度が一定以上の略円状の範囲が４つ形成されることになる。即ち、磁束密度が一定以上の４つの略円状の範囲間には、その略円状の範囲が重ならず、磁束密度の低い空間ができる。このため電極全体における磁束密度分布の均一性についてなお問題が残る。   Also, in the quadrupole type vacuum interrupter, by passing through the gap four times per loop, four substantially circular areas having a certain magnetic flux density distribution or more are formed on the electrode, and the horseshoe type is formed. In comparison, the distribution of magnetic flux density over the entire electrode is improved. However, the magnetic paths Φ61a, Φ61b, Φ61c, and Φ61d that are adjacent on the electrode have different magnetic flux lines, so that there are substantially circular ranges around the magnetic paths that are independent and have a magnetic flux density of a certain level or more. Four will be formed. That is, between the four substantially circular ranges having a certain magnetic flux density or more, the substantially circular ranges do not overlap, and a space with a low magnetic flux density is formed. For this reason, the problem still remains about the uniformity of magnetic flux density distribution in the whole electrode.

さらには、１本のループあたり４回ギャップを通過するので、磁気経路の磁気抵抗が増加する。このため、縦磁界電極の軸方向の磁束密度が低下し、強力な磁界を得ることができないという問題があった。   Further, since the gap is passed four times per loop, the magnetic resistance of the magnetic path is increased. For this reason, the magnetic flux density in the axial direction of the longitudinal magnetic field electrode is lowered, and there is a problem that a strong magnetic field cannot be obtained.

上記課題を解決するために本発明は、縦磁界電極の磁束密度分布および磁界強度を改善することにより、遮断性能を向上させた真空インタラプタを提供することを目的とする。   In order to solve the above-described problems, an object of the present invention is to provide a vacuum interrupter with improved interruption performance by improving the magnetic flux density distribution and magnetic field strength of a longitudinal magnetic field electrode.

上記目的を達成するために、本発明の真空インタラプタは、向かい合う一対の第１，第２電極の背面にそれぞれ第１，第２通電軸を有し、当該第１，第２通電軸の周囲に磁性体を設けた真空インタラプタにおいて、第１電極の背面から前記第１通電軸の軸方向に所定の距離を保って配置された、Ｕ字形でかつ該Ｕ字の両端部から前記第１通電軸の軸方向に伸びた柱状部が前記第１電極の背面と当接する第１電極側Ｕ字形磁性体と、第２電極の背面に当接した、円弧形でかつ該円弧の両端部が前記第１電極側Ｕ字形磁性体の柱状部の軸方向の延長線上に位置する第２電極側円弧形磁性体と、を１組として第一の磁気経路を形成し、第２電極の背面から前記第２通電軸の軸方向に所定の距離を保ち前記第１電極側Ｕ字形磁性体から約１８０度ずらして配置された、Ｕ字形でかつ該Ｕ字の両端部から前記第２通電軸の軸方向に伸びた柱状部が前記第２電極の背面と当接する第２電極側Ｕ字形磁性体と、第１電極の背面に当接し第２電極側円弧形磁性体から約１８０度ずらして配置された、円弧形でかつ該円弧の両端部が前記第２電極側Ｕ字形磁性体の柱状部の軸方向の延長線上に位置する第１電極側円弧形磁性体と、を１組として第二の磁気経路を形成したことを特徴とする。 In order to achieve the above object, a vacuum interrupter of the present invention has first and second energization shafts on the back surfaces of a pair of opposed first and second electrodes, respectively, around the first and second energization shafts. in a vacuum interrupter provided with a magnetic material, arranged with a predetermined distance from the rear surface of the first electrode in the axial direction of the first current-carrying rod, U-shaped a and the first current-carrying rod from both ends of the U-shaped a first electrode side U-shaped magnetic body columnar portion extending in the axial direction is the rear abutment of the first electrode, in contact with the rear surface of the second electrode, and both end portions of the arc is a circular arc shape the a second electrode side arc shaped magnetic body located on the axial extension of the columnar portion of the first electrode side U-shaped magnetic body, the forming a first magnetic path as a set, from the rear surface of the second electrode the second in the axial direction of the energization shaft maintaining a predetermined distance the first electrode side U-shaped magnetic approximately 180 degrees from the body Shifts Arranged Te, a second electrode side U-shaped magnetic body on which the columnar section extending from both ends of and the U-shaped U-shaped in the axial direction of the second current-carrying rod abuts the rear surface of the second electrode, the first An arc shape that is in contact with the back surface of one electrode and is displaced from the second electrode side arc-shaped magnetic body by about 180 degrees and both ends of the arc are columnar portions of the second electrode side U-shaped magnetic body. A second magnetic path is formed by forming a set of the first electrode side arc-shaped magnetic body located on the extension line in the axial direction .

向かい合う一対の電極の一方の背面に配置されるＵ字形および他方の背面に配置される円弧形の１組の磁性体によって磁気経路を形成するとともに、当該２つ１組の磁性体と同一形状のもう１組の磁性体を、それぞれ対向する電極の背面に約１８０度ずらして配置したため、計２箇所にループが形成されることにより電極径方向の磁束密度分布が改善される。さらにギャップの通過回数が１ループあたり２回に抑えられるので、強い磁界強度を得ることができ、遮断性能を向上することができる。   A magnetic path is formed by a pair of magnetic bodies of a U shape disposed on one back surface of a pair of electrodes facing each other and an arc shape disposed on the other back surface, and has the same shape as the pair of magnetic bodies. Since the other pair of magnetic bodies are arranged with a shift of about 180 degrees on the back surfaces of the electrodes facing each other, a loop is formed at a total of two locations, thereby improving the magnetic flux density distribution in the electrode radial direction. Furthermore, since the number of times the gap passes can be suppressed to twice per loop, a strong magnetic field strength can be obtained, and the blocking performance can be improved.

本発明に係る縦磁界電極の斜視図である。It is a perspective view of the longitudinal magnetic field electrode which concerns on this invention. 図１の磁性体により形成される磁気経路の説明図である。It is explanatory drawing of the magnetic path formed with the magnetic body of FIG. 図１の電極の磁界を模式的に示した平面図である。It is the top view which showed typically the magnetic field of the electrode of FIG. 従来の馬蹄形タイプの縦磁界電極の斜視図である。It is a perspective view of the conventional horseshoe type vertical magnetic field electrode. 図４の磁性体により形成される磁気経路の説明図である。It is explanatory drawing of the magnetic path formed with the magnetic body of FIG. 図４の電極の磁界を模式的に示した平面図である。It is the top view which showed typically the magnetic field of the electrode of FIG. 従来の四重極タイプの縦磁界電極を示した斜視図である。It is the perspective view which showed the conventional quadrupole type vertical magnetic field electrode. 図７の磁性体により形成される磁気経路の説明図である。It is explanatory drawing of the magnetic path formed with the magnetic body of FIG. 図７の電極間の磁界を模式的に示した平面図である。It is the top view which showed typically the magnetic field between the electrodes of FIG. 本発明および従来の縦磁界電極の軸方向磁束密度の比較図である。It is a comparison figure of the axial direction magnetic flux density of this invention and the conventional longitudinal magnetic field electrode. 本発明の磁性体のねじ止め固定方法を示した全体図である。It is the whole figure which showed the screwing fixing method of the magnetic body of this invention. 本発明の磁性体のねじ止め固定時の通電軸の構造を示した図である。It is the figure which showed the structure of the electricity supply shaft at the time of screwing fixation of the magnetic body of this invention. 本発明の磁性体のろう付けによる固定方法を示した工程図である。It is process drawing which showed the fixing method by brazing of the magnetic body of this invention.

以下、本発明の実施の形態を図を参照して説明する。図１において、図示しない真空バルブの固定側端板に貫設された固定側通電軸１Ａの下端には、円板状に形成された電極２Ａがろう付けされている。電極２Ａは遮断性能および通電性能に優れた部材、例えば銅−クロム材によって形成されている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a disk-shaped electrode 2A is brazed to the lower end of a fixed energizing shaft 1A penetrating a fixed end plate of a vacuum valve (not shown). The electrode 2A is formed of a member excellent in interruption performance and energization performance, for example, a copper-chromium material.

図１、図２に示すように、電極２Ａの背面に当接するように円弧形磁性体３Ａが配置されている。さらに円弧形磁性体３Ａから通電軸１Ａの軸線方向に所定の距離を保った位置に、通電軸１Ａを周方向に覆うようなＵ字形でかつ両端部（開極部）に柱状部４ａを有するＵ字形磁性体４Ａが配置されている。ここで、所定の距離としては、後述する２つの磁気経路Φ５、Φ６が互いに干渉しないために、ギャップと同等以上の距離を持たせることが望ましい。   As shown in FIGS. 1 and 2, the arc-shaped magnetic body 3A is disposed so as to contact the back surface of the electrode 2A. Further, columnar portions 4a are formed in U-shapes so as to cover the energizing shaft 1A in the circumferential direction and at both end portions (opening portions) at a position keeping a predetermined distance from the arc-shaped magnetic body 3A in the axial direction of the energizing shaft 1A. A U-shaped magnetic body 4A having the same is disposed. Here, as the predetermined distance, it is desirable to have a distance equal to or greater than the gap so that two magnetic paths Φ5 and Φ6 described later do not interfere with each other.

柱状部４ａは通電軸１Ａの軸方向で、かつ電極２Ａ側（図中下方）に伸びており、その下端が電極２Ａと当接している。なお、円弧形磁性体３ＡおよびＵ字形磁性体４Ａは、通電軸１Ａの周囲を各々約９０度超（例えば１１０度程度）、２７０度超（例えば２９０度程度）ずつ覆うように形成されている。   The columnar portion 4a extends in the axial direction of the energizing shaft 1A and toward the electrode 2A (downward in the figure), and its lower end is in contact with the electrode 2A. The arc-shaped magnetic body 3A and the U-shaped magnetic body 4A are formed so as to cover the circumference of the energizing shaft 1A by about 90 degrees (for example, about 110 degrees) and 270 degrees (for example, about 290 degrees), respectively. Yes.

同様に、図１において、図示しない真空バルブの可動側端板に貫設された可動側通電軸１Ｂの上端にも、可動側と同一形状の電極２Ｂがろう付けされている。電極２Ｂの背面には、図１、図２に示すように可動側の円弧形磁性体３Ａと同一形状の円弧形磁性体３Ｂが電極２Ｂと当接するように配置されている。この円弧形磁性体３Ｂはその両端部が、可動側のＵ字形磁性体４Ａの柱状部４ａの軸方向の延長線上に位置するように配置されている。   Similarly, in FIG. 1, an electrode 2B having the same shape as that of the movable side is also brazed to the upper end of the movable side energizing shaft 1B penetrating through the movable side end plate of a vacuum valve (not shown). As shown in FIGS. 1 and 2, an arc-shaped magnetic body 3B having the same shape as the movable-side arc-shaped magnetic body 3A is disposed on the back surface of the electrode 2B so as to contact the electrode 2B. The arc-shaped magnetic body 3B is arranged so that both ends thereof are located on the extension line in the axial direction of the columnar portion 4a of the movable U-shaped magnetic body 4A.

さらに、円弧形磁性体３Ｂから通電軸１Ｂの軸方向に所定の距離を保った位置に、Ｕ字形磁性体４Ａと同一形状のＵ字形磁性体４Ｂが配置されている。このＵ字形磁性体４Ｂの柱状部４ｂは通電軸１Ｂの軸線方向でかつ電極２Ｂ側（図中上方）に伸びており、その上端が電極２Ｂと当接している。さらに、柱状部４ｂの軸線方向の延長線上に、可動側の円弧形磁性体３Ａの両端が位置するように配置されている。   Further, a U-shaped magnetic body 4B having the same shape as the U-shaped magnetic body 4A is disposed at a position that maintains a predetermined distance from the arc-shaped magnetic body 3B in the axial direction of the energizing shaft 1B. The columnar portion 4b of the U-shaped magnetic body 4B extends in the axial direction of the current-carrying shaft 1B and toward the electrode 2B (upward in the drawing), and its upper end is in contact with the electrode 2B. Furthermore, it arrange | positions so that the both ends of 3 A of arc-shaped magnetic bodies on the movable side may be located on the extension line | wire of the axial direction of the columnar part 4b.

上述したように、対向する可動側電極２Ａおよび固定側電極２Ｂの背面には、それぞれ同一形状の円弧形磁性体３Ａ、３ＢおよびＵ字形磁性体４Ａ、４Ｂが互いに約１８０度ずらした状態で配置されている。また、通電軸１の周囲を円弧形磁性体３は９０度超、Ｕ字型磁性体４は２７０度超程度覆うように形成しているので、２つの磁性体３、４を合わせて通電軸１の周囲を３６０度以上覆う形となる。このため、例えば円弧形磁性体３ＢとＵ字型磁性体４Ａは互いにその両端がラップするように配置される。よって、磁性体のラップ箇所において磁気抵抗が下がり、磁力線が通過しやすくなるので、所定のループが形成されやすくなる。   As described above, the arc-shaped magnetic bodies 3A, 3B and U-shaped magnetic bodies 4A, 4B having the same shape are respectively shifted by about 180 degrees on the back surfaces of the movable electrode 2A and the fixed electrode 2B facing each other. Has been placed. Further, since the arc-shaped magnetic body 3 and the U-shaped magnetic body 4 are formed so as to cover the circumference of the current-carrying shaft 1 by more than 90 degrees and the U-shaped magnetic body 4 by more than 270 degrees, the two magnetic bodies 3 and 4 are energized together. The periphery of the shaft 1 is covered by 360 degrees or more. For this reason, for example, the arc-shaped magnetic body 3 </ b> B and the U-shaped magnetic body 4 </ b> A are arranged so that both ends thereof wrap around each other. Therefore, the magnetic resistance is lowered at the wrapping location of the magnetic material, and the magnetic lines of force are easily passed, so that a predetermined loop is easily formed.

これらの各磁性体は、電極および通電軸にろう付けもしくはねじ止めによって固定される。なお、固定側、可動側で磁性体の固定方法は同一のため、ここでは、一方の電極の背面に設けられた磁性体の固定方法のみ説明する。   Each of these magnetic bodies is fixed to the electrode and the current-carrying shaft by brazing or screwing. Since the fixing method of the magnetic body is the same on the fixed side and the movable side, only the fixing method of the magnetic body provided on the back surface of one electrode will be described here.

ねじ止めの場合、図１１、図１２に示すように円弧形磁性体３ＢおよびＵ字形磁性体４Ｂに複数箇所形成した貫通孔７と、それと対応するように通電軸１Ａに形成したねじ穴８にねじ９を螺合させる。本実施例では、円弧形磁性体３Ｂに２箇所の貫通孔７ａ、７ｂを設け、通電軸１Ｂにはこれらと対応するねじ穴８ａ、８ｂを形成し、ねじ９を螺合させることでねじ止めを行っている。   In the case of screwing, as shown in FIGS. 11 and 12, through holes 7 formed in a plurality of locations in the arc-shaped magnetic body 3B and the U-shaped magnetic body 4B, and screw holes 8 formed in the energizing shaft 1A so as to correspond thereto. The screw 9 is screwed into the screw. In the present embodiment, the arc-shaped magnetic body 3B is provided with two through holes 7a and 7b, the energizing shaft 1B is formed with screw holes 8a and 8b corresponding thereto, and the screws 9 are screwed together so as to be screwed. Stopping.

一方、Ｕ字形磁性体４Ｂには３箇所の貫通孔７ｃ、７ｄ、７ｅを設け、通電軸１Ｂにはこれらと対応する８ｃ、８ｄ、８ｅを形成し、ねじ９を螺合させてねじ止めを行う。これにより円弧形磁性体３ＢおよびＵ字形磁性体４Ｂを、通電軸１Ｂと一体化し固定する。   On the other hand, the U-shaped magnetic body 4B is provided with three through-holes 7c, 7d, and 7e, and the current-carrying shaft 1B is formed with 8c, 8d, and 8e corresponding thereto, and screws 9 are screwed together to be screwed. Do. Thereby, the arc-shaped magnetic body 3B and the U-shaped magnetic body 4B are integrated and fixed with the energizing shaft 1B.

ろう付け固定の場合、図１３に示すように、円弧形磁性体３Ａと電極２Ａとの当接面にろう材１０を設ける。さらに、円弧形磁性体３Ａと通電軸１Ａとの周方向の当接部にろう材１１を挟み込むことで、円弧形磁性体３Ａを電極２Ａおよび通電軸１Ａにろう付け固定する。   In the case of brazing and fixing, a brazing material 10 is provided on the contact surface between the arc-shaped magnetic body 3A and the electrode 2A as shown in FIG. Furthermore, the arc-shaped magnetic body 3A is brazed and fixed to the electrode 2A and the energizing shaft 1A by sandwiching the brazing material 11 in the circumferential contact portion between the arc-shaped magnetic body 3A and the energizing shaft 1A.

一方、Ｕ字形磁性体４Ａと電極２Ａとの当接面、即ち柱状部４ａの先端部と電極２Ａとの当接面にろう材１２を設ける。さらに、Ｕ字形磁性体４ＡのＵ字形状部で、かつ通電軸１Ａとの周方向の当接部にろう材１３を挟み込むことで、電極２Ａと通電軸１Ａにろう付け固定を行う。   On the other hand, the brazing material 12 is provided on the contact surface between the U-shaped magnetic body 4A and the electrode 2A, that is, the contact surface between the tip of the columnar portion 4a and the electrode 2A. Further, the brazing material 13 is sandwiched between the U-shaped portion of the U-shaped magnetic body 4A and the circumferential contact portion with the current-carrying shaft 1A, so that the electrode 2A and the current-carrying shaft 1A are brazed and fixed.

次に、上述の磁性体配置による磁気経路および電極径方向の磁束密度分布につき説明する。図２では、通電時に各磁性体を磁力線が通過することで形成される磁気経路を点線で示している。図の矢印で示す通り、円弧形磁性体３Ａを通る磁力線はギャップを通過した後、Ｕ字形磁性体４Ｂに至り、さらに円弧形磁性体３Ａへ戻ることで、ループΦ５を形成している。   Next, the magnetic path and the magnetic flux density distribution in the electrode radial direction by the above-described magnetic material arrangement will be described. In FIG. 2, a magnetic path formed by passing a magnetic line of force through each magnetic body when energized is indicated by a dotted line. As indicated by the arrows in the figure, the magnetic field lines passing through the arc-shaped magnetic body 3A pass through the gap, then reach the U-shaped magnetic body 4B, and further return to the arc-shaped magnetic body 3A, thereby forming a loop Φ5. .

また、Ｕ字形磁性体４Ａを通る磁力線は、ギャップを通過した後、円弧形磁性体３Ｂに至り、さらにＵ字形磁性体４Ａへ戻ることでループΦ６を形成している。ここでは磁気経路はそれぞれ１本ずつのループΦ５、Φ６で示しているが、実際にはループΦ５、Φ６の周囲に縦方向の磁束が発生している。   Further, the magnetic field lines passing through the U-shaped magnetic body 4A pass through the gap, reach the arc-shaped magnetic body 3B, and further return to the U-shaped magnetic body 4A to form a loop Φ6. Here, the magnetic paths are indicated by one loop Φ5 and Φ6, respectively, but actually, a vertical magnetic flux is generated around the loops Φ5 and Φ6.

このような構成によれば、ギャップには図３に模式的に示すように、磁束密度が一定以上の範囲（点線部）が形成される。即ち、磁性体３、４のラップ部であるため磁気抵抗が低く磁束密度が高くなっているループΦ５、６の磁気経路Φ５ａ、Φ６ａおよびΦ５ｂ、Φ６ｂを中心として、その周囲に磁束密度が一定以上の略長円状の範囲が２箇所形成される。また、本構成では、隣り合う磁気経路Φ５ａ、Φ６ａおよびΦ５ｂ、Φ６ｂの磁力線の進行方向が同一のため、磁束密度が一定以上の範囲が四重極タイプのように独立に形成されることなく、互いに合わさるように広がる。このため、２つのループΦ５、Φ６を中心として分布する磁束密度が一定以上の範囲は長円状となり、磁束密度分布が電極上を左右対称に均一に広がる。   According to such a configuration, as schematically shown in FIG. 3, a range (dotted line portion) where the magnetic flux density is a certain level or more is formed in the gap. That is, the magnetic flux density is more than a certain value around the magnetic paths Φ5a, Φ6a and Φ5b, Φ6b of the loops Φ5, Φ6, which have a low magnetic resistance and a high magnetic flux density because they are the wrap portions of the magnetic bodies 3, 4. Are formed in two places. Further, in this configuration, the traveling directions of the magnetic lines of force of the adjacent magnetic paths Φ5a, Φ6a and Φ5b, Φ6b are the same, so that the range of the magnetic flux density is not independently formed as in the quadrupole type, Spread to fit each other. For this reason, the range in which the magnetic flux density distributed around the two loops Φ5 and Φ6 is a certain value or more is an oval shape, and the magnetic flux density distribution is spread evenly symmetrically on the electrode.

次に、本発明の縦磁界電極における磁界強度を、従来の四重極タイプ電極と比較して説明する。   Next, the magnetic field strength in the longitudinal magnetic field electrode of the present invention will be described in comparison with a conventional quadrupole type electrode.

磁界強度は、起磁力／磁気抵抗で求められる。起磁力は通電軸の周囲に発生する磁束により得られる力であり、磁性体によってギャップ間に導かれる。図８の四重極タイプでは起磁力は１本のループΦ６１に導かれる。一方、図２の本発明においては各々の通電軸１Ａ、１Ｂの周囲に同等の力で発生する起磁力を２本のループΦ６、Φ５にそれぞれ導く。   The magnetic field strength is obtained by magnetomotive force / magnetic resistance. The magnetomotive force is a force obtained by the magnetic flux generated around the current-carrying shaft and is guided between the gaps by the magnetic material. In the quadrupole type of FIG. 8, the magnetomotive force is guided to one loop Φ61. On the other hand, in the present invention shown in FIG. 2, magnetomotive forces generated with the same force around the respective energizing shafts 1A and 1B are guided to the two loops Φ6 and Φ5, respectively.

磁気経路全体の磁気抵抗はギャップ間距離をｇ、接触子の厚さをｄとするとｇ+２ｄに比例する。なお、接触子には非磁性材料が使われており、この部分の磁気抵抗は無視できる。   The magnetoresistance of the entire magnetic path is proportional to g + 2d, where g is the gap distance and d is the contact thickness. Note that a non-magnetic material is used for the contact, and the magnetic resistance of this portion can be ignored.

四重極タイプは１本のループあたり４回ギャップを通過するため、磁気抵抗は４（ｇ+２ｄ）に比例する。一方本発明の場合、電極全体として２本のループあたり４回ギャップを通過する。即ち、１本のループあたりギャップを通過する回数は２回であり、磁気抵抗は２（ｇ+２ｄ）に比例する。各通電軸に発生する起磁力の条件を同じにした場合において、本発明の場合、磁気抵抗は四重極タイプの１／２となるため、より強い磁界強度を得ることが出来る。   Since the quadrupole type passes through the gap four times per loop, the magnetic resistance is proportional to 4 (g + 2d). On the other hand, in the case of the present invention, the entire electrode passes through the gap four times per two loops. That is, the number of passes through the gap per loop is two, and the magnetoresistance is proportional to 2 (g + 2d). In the case of the present invention, when the conditions of magnetomotive force generated in each energizing shaft are the same, the magnetic resistance is ½ of the quadrupole type, so that a stronger magnetic field strength can be obtained.

図１０はギャップ長を３０ｍｍとした場合の、従来と本発明の真空インタラプタの電極上の軸方向磁束密度分布を比較した図である。縦軸は軸方向の磁束密度、横軸は電極の径方向の距離を示している。また、曲線Ｃ〜Ｅはそれぞれ図９に示す四重極タイプ、図６に示す馬蹄形タイプおよび図３に示す本実施例における真空インタラプタの電極を径方向に切り出した部分の磁束密度を示す。   FIG. 10 is a diagram comparing axial magnetic flux density distributions on the electrodes of the vacuum interrupter of the present invention and the conventional one when the gap length is 30 mm. The vertical axis represents the magnetic flux density in the axial direction, and the horizontal axis represents the distance in the radial direction of the electrode. Curves C to E respectively show the magnetic flux densities of the quadrupole type shown in FIG. 9, the horseshoe type shown in FIG. 6, and the portion of the vacuum interrupter electrode shown in FIG. 3 cut out in the radial direction.

電極部（３０〜７０ｍｍ）の範囲をみると、四重極タイプＣの磁束密度の最大値が０．００４Ｔ程度であるのに対し、馬蹄形タイプＤおよび本実施例Ｅの電極最大磁束密度は０．０１２〜０．０１３Ｔ程度であり、磁束密度が高くなっていることが分かる。即ち、ギャップ間においてより強い磁界強度が得られていることを意味する。   Looking at the range of the electrode part (30 to 70 mm), the maximum value of the magnetic flux density of the quadrupole type C is about 0.004T, whereas the maximum magnetic flux density of the horseshoe type D and the example E is 0. It is about .012 to 0.013 T, and it can be seen that the magnetic flux density is high. That is, a stronger magnetic field strength is obtained between the gaps.

上述のように本発明によれば、１ループあたり２ギャップの磁気経路を２つ設けた構成としたことで、従来の馬蹄形タイプに比べ電極径方向の磁界分布が改善される。また、四重極タイプと比べても電極径方向の磁界分布が改善されるとともに、さらにはギャップの磁界強度を高めることが可能となるので、磁束密度分布、磁界強度の改善の両立を図ることができ、ひいては縦磁界電極の遮断性能を向上させることが出来る。   As described above, according to the present invention, the magnetic field distribution in the electrode radial direction is improved as compared with the conventional horseshoe type by providing two magnetic paths with two gaps per loop. Compared to the quadrupole type, the magnetic field distribution in the electrode radial direction is improved, and further, the magnetic field strength of the gap can be increased, so that both the magnetic flux density distribution and the magnetic field strength can be improved. As a result, the interruption performance of the longitudinal magnetic field electrode can be improved.

１Ａ、１Ｂ 通電軸
２Ａ、２Ｂ 接触子
３Ａ、３Ｂ 円弧形磁性体
４Ａ、４Ｂ Ｕ字形磁性体
Φ５、Φ６ 閉じた磁力線（ループ）
ｇ 電極間（ギャップ）
ｄ 接触子の厚さ 1A, 1B Conducting shaft 2A, 2B Contact 3A, 3B Arc-shaped magnetic body 4A, 4B U-shaped magnetic body Φ5, Φ6 Closed magnetic field lines (loop)
g Between electrodes (gap)
d Contact thickness

Claims (1)

向かい合う一対の第１，第２電極の背面にそれぞれ第１，第２通電軸を有し、当該第１，第２通電軸の周囲に磁性体を設けた真空インタラプタにおいて、
第１電極の背面から前記第１通電軸の軸方向に所定の距離を保って配置された、Ｕ字形でかつ該Ｕ字の両端部から前記第１通電軸の軸方向に伸びた柱状部が前記第１電極の背面と当接する第１電極側Ｕ字形磁性体と、
第２電極の背面に当接した、円弧形でかつ該円弧の両端部が前記第１電極側Ｕ字形磁性体の柱状部の軸方向の延長線上に位置する第２電極側円弧形磁性体と、を１組として第一の磁気経路を形成し、
第２電極の背面から前記第２通電軸の軸方向に所定の距離を保ち前記第１電極側Ｕ字形磁性体から約１８０度ずらして配置された、Ｕ字形でかつ該Ｕ字の両端部から前記第２通電軸の軸方向に伸びた柱状部が前記第２電極の背面と当接する第２電極側Ｕ字形磁性体と、
第１電極の背面に当接し第２電極側円弧形磁性体から約１８０度ずらして配置された、円弧形でかつ該円弧の両端部が前記第２電極側Ｕ字形磁性体の柱状部の軸方向の延長線上に位置する第１電極側円弧形磁性体と、を１組として第二の磁気経路を形成したことを特徴とする真空インタラプタ。 In a vacuum interrupter having first and second current-carrying shafts on the back surfaces of a pair of opposed first and second electrodes, respectively , and providing a magnetic body around the first and second current-carrying shafts,
Columnar portions that are U-shaped and extend from both ends of the U-shape in the axial direction of the first current-carrying shaft are disposed at a predetermined distance from the back surface of the first electrode in the axial direction of the first current-carrying shaft. a first electrode side U-shaped magnetic body rear abutment of the first electrode,
In contact with the rear surface of the second electrode, an arc-shaped and the second electrode side arc shaped magnetic both ends of the arc is located on the axial extension of the columnar portion of the first electrode side U-shaped magnetic body And the body as a set to form a first magnetic path,
A U-shape arranged at a predetermined distance from the back surface of the second electrode in the axial direction of the second current-carrying shaft and shifted by about 180 degrees from the first electrode-side U-shaped magnetic body , and from both ends of the U-shape. A second electrode side U-shaped magnetic body in which a columnar portion extending in the axial direction of the second current-carrying shaft comes into contact with the back surface of the second electrode;
An arc shape that is in contact with the back surface of the first electrode and is displaced by about 180 degrees from the second electrode side arc-shaped magnetic body, and both ends of the arc are columnar portions of the U-shaped magnetic body on the second electrode side A vacuum interrupter, characterized in that a second magnetic path is formed by combining a first electrode-side arc-shaped magnetic body positioned on an extension line in the axial direction of the first magnetic path.
JP2011110163A 2011-05-17 2011-05-17 Vacuum interrupter Active JP5648577B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011110163A JP5648577B2 (en) 2011-05-17 2011-05-17 Vacuum interrupter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011110163A JP5648577B2 (en) 2011-05-17 2011-05-17 Vacuum interrupter

Publications (2)

Publication Number Publication Date
JP2012243444A JP2012243444A (en) 2012-12-10
JP5648577B2 true JP5648577B2 (en) 2015-01-07

Family

ID=47464971

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011110163A Active JP5648577B2 (en) 2011-05-17 2011-05-17 Vacuum interrupter

Country Status (1)

Country Link
JP (1) JP5648577B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208157318U (en) * 2018-03-21 2018-11-27 西门子公司 Vacuum interrupter and contactor for contactor
WO2019188699A1 (en) * 2018-03-29 2019-10-03 三菱電機株式会社 Vacuum valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL168361C (en) * 1977-12-05 1982-03-16 Hazemeijer Bv ELECTRIC VACUUM SWITCH.
NL8400873A (en) * 1984-03-19 1985-10-16 Hazemeijer Bv VACUUM SWITCH, EQUIPPED WITH HORSESHOE-ORGANS FOR GENERATING AN AXIAL MAGNETIC FIELD.
JP3146158B2 (en) * 1996-06-04 2001-03-12 株式会社東芝 Vacuum valve
JPH11260207A (en) * 1998-03-12 1999-09-24 Toshiba Corp Vacuum valve
JP3431487B2 (en) * 1998-03-13 2003-07-28 株式会社東芝 Vacuum valve

Also Published As

Publication number Publication date
JP2012243444A (en) 2012-12-10

Similar Documents

Publication Publication Date Title
JP5249255B2 (en) Vacuum circuit breaker electrode
WO2006129596A1 (en) Long-proportion stroke force motor
KR102606473B1 (en) Direct current relay to prevent short circuit current
JP5648577B2 (en) Vacuum interrupter
KR20120079154A (en) Vacuum bulb
JP2009542167A (en) Electric machine with uneven pole teeth
TW201214499A (en) Multi-axis lens, beam system making use of the compound lens, and method of manufacturing the compound lens
CN105470065B (en) Actuator and its manufacturing method for breaker
JP2015137892A (en) Current detection structure
KR20100049645A (en) Coil bus for a transformer and a method of manufacturing the same
WO1997009729A1 (en) Vacuum valve
JP5274676B2 (en) Vacuum valve
JP2010220387A (en) Stator
JP5210789B2 (en) Vacuum valve
JP2012161126A (en) Electric motor, compressor, and apparatus
JP2011188546A (en) Voice coil motor
JP5664333B2 (en) Circuit breaker
JP6651878B2 (en) Vacuum valve
JP2006197710A (en) Stator of rotating electric machine
JP2010225901A (en) Reactor
WO2011052109A1 (en) Vacuum valve
JP6160071B2 (en) Inductor
JP4514439B2 (en) Rotating electric machine
JP2015012224A (en) Zero-phase current transformer
JP5139161B2 (en) Vacuum valve

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20121101

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20130513

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20131226

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20140626

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20140626

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140724

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140729

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140925

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20141014

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20141027

R150 Certificate of patent or registration of utility model

Ref document number: 5648577

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150