JP3355600B2 - Shock current detector - Google Patents
Shock current detectorInfo
- Publication number
- JP3355600B2 JP3355600B2 JP20526098A JP20526098A JP3355600B2 JP 3355600 B2 JP3355600 B2 JP 3355600B2 JP 20526098 A JP20526098 A JP 20526098A JP 20526098 A JP20526098 A JP 20526098A JP 3355600 B2 JP3355600 B2 JP 3355600B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- current
- current detecting
- conductor
- detecting device
- 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.)
- Expired - Fee Related
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
【０００１】[0001]
【発明の属する技術の分野】本発明は、衝撃大電流を電
磁誘導により非接触で検出する検出する衝撃電流検出装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact current detecting device for detecting a large impact current in a non-contact manner by electromagnetic induction.
【０００２】[0002]
【従来の技術】例えば落雷により生じた衝撃大電流の検
出は、空芯コイルの一端側の巻端を他端側に引き戻し、
コイル全体をリング状に周回させて構成されたロゴスキ
ーコイルを用い、磁束の微分値として検出された電圧
を、ロゴスキーコイルに外部接続した積分回路により電
流積分することにより行われている。2. Description of the Related Art For example, the detection of a large impact current caused by a lightning strike involves pulling the winding end of one end of an air-core coil back to the other end.
This is performed by using a Rogowski coil configured by making the entire coil circulate in a ring shape, and integrating the voltage detected as the differential value of the magnetic flux by an integration circuit externally connected to the Rogowski coil.
【０００３】[0003]
【発明が解決しようとする課題】このように電磁界の時
間的変化を電圧として検出する微分機能を備えているた
め、強電磁界ノイズの影響を受けやすく、特に低周波領
域の電流値に誤差を含みやすいという問題がある。ま
た、検出がコイルに流れる電流が、コイルに外部接続さ
れた積分回路の回路定数の抵抗成分の影響を受けるた
め、数メガヘルツ以上の高周波領域、及び数十ヘルツ領
域の低周波領域の検出感度が低く、また後段の信号処理
手段が、コイルに導電的に接続されてるため、高電圧、
高電流に耐え得る電子部品を必要とし、信号処理手段の
コストが上昇するという問題となる。本発明はこのよう
な問題に鑑みてなされたものであって、その目的とする
ところは、検出可能な周波数領域の拡大を図るともに、
後段の信号処理手段と絶縁して信号処理手段の耐圧対策
を不要として衝撃電流検出装置を提供することである。Since a differential function for detecting a temporal change of an electromagnetic field as a voltage is provided as described above, the differential function is susceptible to strong electromagnetic field noise. There is a problem of easy inclusion. In addition, since the current flowing through the coil is affected by the resistance component of the circuit constant of the integrating circuit externally connected to the coil, the detection sensitivity in a high frequency region of several megahertz or more and a low frequency region of several tens of hertz is reduced. Low, and the subsequent signal processing means are conductively connected to the coil,
An electronic component capable of withstanding a high current is required, and the cost of the signal processing unit increases. The present invention has been made in view of such a problem, and aims to expand a detectable frequency range,
It is an object of the present invention to provide an impact current detecting device which is insulated from a signal processing means in a subsequent stage and eliminates the need for a measure against withstand voltage of the signal processing means.
【０００４】[0004]
【課題を解決するための手段】このような問題を解消す
るために本発明においては、導体を所定の径で巻回して
コイルを形成して各端部が対向するようにリングに整形
し、前記リングに沿うように接続用導体を配設して前記
コイルの巻端を短絡するとともに、前記接続用導体に電
磁誘導により信号を取り出す電流−電圧検出手段を設け
るようにした。In order to solve such a problem, in the present invention, a conductor is wound around a predetermined diameter to form a coil, and the coil is formed into a ring so that each end faces each other. A connection conductor is arranged along the ring to short-circuit the winding end of the coil, and the connection conductor is provided with current-voltage detection means for extracting a signal by electromagnetic induction.
【０００５】[0005]
【作用】衝撃電流による磁界をコイルによりコイル及び
接続導体により決まる積分定数で電流に変換し、この電
流をコイルから導電的に絶縁された電流ー電圧変換手段
により信号として取出す。The magnetic field due to the shock current is converted into a current by the coil using an integration constant determined by the coil and the connection conductor, and the current is extracted as a signal by current-voltage conversion means electrically insulated from the coil.
【０００６】[0006]
【実施の態様】そこで以下に本発明の詳細を図示した実
施例に基づいて説明する。図１は本発明の一実施例を示
すものであって、衝撃電流検出コイル本体１は、絶縁被
覆された導体２を所定の直径、所定のターン数で巻回し
て構成され、一方の巻回端部２ａをコイル本体内を通し
て他方の巻回端部２ｂまで引き戻して巻回端部２ａ、２
ｂが短絡されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the illustrated embodiments. FIG. 1 shows an embodiment of the present invention, in which an impact current detecting coil main body 1 is formed by winding a conductor 2 coated with an insulation with a predetermined diameter and a predetermined number of turns. The end 2a is pulled back through the coil body to the other winding end 2b, and the winding end 2a, 2
b is short-circuited.
【０００７】巻回端部の接続領域には、導体２を流れる
電流を電磁誘導により電圧として検出する電流トランス
３が誘導関係を形成するように結合されている。A current transformer 3 for detecting a current flowing through the conductor 2 as a voltage by electromagnetic induction is connected to the connection region at the winding end so as to form an inductive relationship.
【０００８】このように構成された衝撃電流検出コイル
本体１は、電気絶縁性及び可撓性を有する材料、例えば
高分子材料からなるパイプ４内に挿入し、パイプ４の端
部を、電流トランス３が収容可能な接続具６によりリン
グとして成形し、電流トランス３のリード線５が外部に
引き出されている。[0008] The impact current detecting coil body 1 thus constructed is inserted into a pipe 4 made of a material having electrical insulation and flexibility, for example, a polymer material, and the end of the pipe 4 is connected to a current transformer. 3 is formed as a ring by a fitting 6 that can be accommodated, and the lead wire 5 of the current transformer 3 is drawn out.
【０００９】この実施例において、落雷等の衝撃大電流
が流れて磁界が生じると、電磁誘導により衝撃電流検出
コイル本体１にこれの巻回数分の電流が発生し、コイル
本体１の回路定数に支配された積分動作により衝撃電流
に相似する電流が流れ、電流トランス３により電流ー電
圧変換を受けてリード線５に対応する電圧が誘起する。In this embodiment, when a large impact current such as a lightning strike flows and a magnetic field is generated, a current corresponding to the number of turns is generated in the shock current detection coil body 1 by electromagnetic induction, and the circuit constant of the coil body 1 is reduced. A current similar to an impact current flows by the dominated integration operation, and is subjected to current-voltage conversion by the current transformer 3 to induce a voltage corresponding to the lead wire 5.
【００１０】本発明によれば、コイル本体１に外づけ積
分回路が接続されていないため、積分回路による周波数
特性の影響がなく衝撃電流を可及的に広い周波数帯域で
信号に変換することができる。またリード線５は電流ト
ランス３により衝撃電流検出コイル本体１とは導電的に
絶縁されているため、信号処理手段は衝撃電流検出コイ
ル本体１に作用した電界や磁界の影響を受けることがな
く、したがって高耐圧性の電子部品を必要としない。According to the present invention, since the external integrating circuit is not connected to the coil body 1, the impact current is not affected by the integrating circuit and the impact current can be converted into a signal in a frequency band as wide as possible. it can. Since the lead wire 5 is electrically insulated from the shock current detecting coil body 1 by the current transformer 3, the signal processing means is not affected by the electric field or magnetic field acting on the shock current detecting coil body 1, Therefore, there is no need for electronic components having high withstand voltage.
【００１１】なお、上述の実施例においては、コイル本
体１を構成する導体２により短絡しているが、コイル１
とは異なる第２の導体をコイル本体に挿通してコイルの
巻端２ａ、２ｂを接続するようにしても同様の作用を奏
することは明らかである。In the embodiment described above, the conductor 2 constituting the coil body 1 is short-circuited.
It is apparent that a similar effect can be obtained even if a second conductor different from the above is inserted into the coil body to connect the winding ends 2a and 2b of the coil.
【００１２】また上述の実施例においては、外部被覆を
パイプにより構成しているが、硬化性樹脂によりモール
ドして整形しても同様の作用を奏することは明らかであ
る。。In the above-described embodiment, the outer coating is made of a pipe. However, it is apparent that the same effect can be obtained even if the outer coating is formed by molding with a curable resin. .
【００１３】図２（イ）は、本発明の他の実施例を示す
ものであって、導体２に変換レンジが異なる複数の電流
トランス３-1、３-2、３−3が挿入されている。FIG. 2A shows another embodiment of the present invention, in which a plurality of current transformers 3-1, 3-2, 3-3 having different conversion ranges are inserted in a conductor 2. I have.
【００１４】この実施例によれば、コイル本体１に流れ
る電流を、各電流トランスがその検出範囲で電流ー電圧
変換するため、ダイナミックレンジの大きな衝撃電流を
確実に電圧に変換して検出することができる。According to this embodiment, since each current transformer converts the current flowing through the coil main body 1 into a voltage in the detection range thereof, the impact current having a large dynamic range can be reliably converted into a voltage and detected. Can be.
【００１５】また、図２（ロ）に示したように、導体２
にコイル本体２の抵抗Ｒに比較して極めて低く、かつ適
当な分流比を構成できる分流抵抗ｒ1、ｒ2、ｒ3を接続
して分流路を形成し、各分流路に、好ましくは前述と同
様に検出範囲が異なる電流トランス３-1’、３-2’、３
−3’を挿入してもよい。Further, as shown in FIG.
The shunt resistors r1, r2, and r3, which are extremely low compared to the resistance R of the coil body 2 and can form an appropriate shunt ratio, are connected to form shunt channels. Current transformers 3-1 ', 3-2', 3 with different detection ranges
-3 'may be inserted.
【００１６】この実施例によれば、分流抵抗ｒ1、ｒ2、
ｒ3により分流比を調節することにより、各電流トラン
ス３-1’、３-2’、３−3’に適した範囲の電流を検出
させることができる。According to this embodiment, the shunt resistances r1, r2,
By adjusting the shunt ratio by r3, a current in a range suitable for each of the current transformers 3-1 ', 3-2' and 3-3 'can be detected.
【００１７】図３は、本発明の他の実施例を示すもので
あって、この実施例においては検出コイル１の内部にリ
ング状の磁性材７が挿入されている。このような磁性材
は、細径の磁性ワイヤの一端を束ねて検出コイル１に挿
入し、コイル本体と共にリング状に成形したり、またフ
ェライトやパーマロイからなるリング状コアに、コイル
を巻回したり、さらにはリング状コアに切り欠き部を設
け、予め巻回されたコイルを切り欠き部から挿入すれば
よい。FIG. 3 shows another embodiment of the present invention. In this embodiment, a ring-shaped magnetic material 7 is inserted inside the detection coil 1. Such a magnetic material is formed by bundling one end of a small-diameter magnetic wire and inserting it into the detection coil 1 to form a ring shape with the coil body, or winding the coil around a ring-shaped core made of ferrite or permalloy. Further, a notch may be provided in the ring-shaped core, and a coil wound in advance may be inserted from the notch.
【００１８】この実施例によれば、磁性材７によりコイ
ル本体１の透磁率が向上するため、コイル１による検出
感度が向上し、従来、検出感度が極端に低かった数メガ
ヘルツ、及び数十ヘルツ程度の高周波、及び低周波領域
の成分をも確実に検出することができる。According to this embodiment, since the magnetic material 7 improves the magnetic permeability of the coil body 1, the detection sensitivity of the coil 1 is improved, and several megahertz and several tens of hertz, which were conventionally extremely low in detection sensitivity. High-frequency and low-frequency components can be reliably detected.
【００１９】[0019]
【発明の効果】以上，説明したように本発明において
は、導体を所定の径で巻回してコイルを形成して各端部
が対向するようにリングに整形し、リングに沿うように
接続用導体を配設してコイルの巻端を短絡するととも
に、接続用導体に電磁誘導により信号を取り出す電流−
電圧検出手段を設けたので、衝撃電流による磁界をコイ
ルによりコイル及び接続導体により決まる積分定数で電
流に変換し、この電流をコイルから導電的に絶縁された
電流ー電圧変換手段により信号として取出すため、検出
レンジの拡大と、耐圧対策の簡素化を図ることができ
る。As described above, according to the present invention, a conductor is wound with a predetermined diameter to form a coil, shaped into a ring such that each end faces each other, and connected along the ring. A conductor is provided to short-circuit the winding end of the coil and to extract a signal to the connection conductor by electromagnetic induction.
Since the voltage detecting means is provided, the magnetic field due to the shock current is converted into a current by the coil with an integration constant determined by the coil and the connection conductor, and this current is extracted as a signal by the current-voltage converting means electrically insulated from the coil. In addition, it is possible to expand the detection range and to simplify the withstand voltage measures.
【図１】図（イ）、（ロ）は、本発明の衝撃電流検出装
置の一実施例を示す斜視図である。FIGS. 1 (a) and 1 (b) are perspective views showing one embodiment of an impact current detecting device of the present invention.
【図２】図（イ）、（ロ）は、それぞれ本発明の電流−
電圧変換部の他の実施例を示す図である。FIGS. 2 (a) and 2 (b) show current-
It is a figure showing other examples of a voltage conversion part.
【図３】本発明の他の実施例を示す斜視図である。FIG. 3 is a perspective view showing another embodiment of the present invention.
１ 衝撃電流検出用コイル本体 ２ 導線 ３ 電流トランス ４ パイプ ６ 接続具 DESCRIPTION OF SYMBOLS 1 Impact current detection coil main body 2 Conductor 3 Current transformer 4 Pipe 6 Connecting tool
フロントページの続き (56)参考文献 特開 昭64−47959（ＪＰ，Ａ) 特開 昭58−5668（ＪＰ，Ａ) 特開 昭62−98267（ＪＰ，Ａ) 実開 平５−19970（ＪＰ，Ｕ) 実開 平４−118667（ＪＰ，Ｕ) 実開 昭62−121583（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01R 15/00 G01R 19/155 H01F 40/00 - 40/14 Continuation of the front page (56) References JP-A-64-47959 (JP, A) JP-A-58-5668 (JP, A) JP-A-62-98267 (JP, A) JP-A-5-9970 (JP) , U) Japanese Utility Model 4-118667 (JP, U) Japanese Utility Model Application 62-1221583 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G01R 15/00 G01R 19/155 H01F 40/00-40/14
Claims (6)
して各端部が対向するようにリングに整形し、前記リン
グに沿うように接続用導体を配設して前記コイルの巻端
を短絡するとともに、前記接続用導体に電磁誘導により
信号を取り出す電流−電圧検出手段を設けてなる衝撃電
流検出装置。A coil is formed by winding a conductor with a predetermined diameter, and is shaped into a ring so that each end faces each other. A connecting conductor is provided along the ring to wind the coil. An impact current detecting device having a short-circuited end and a current-voltage detecting means for extracting a signal by electromagnetic induction to the connection conductor.
ている導体で構成されている請求項１に記載の衝撃電流
検出装置。2. The impact current detecting device according to claim 1, wherein the connection conductor is formed of a conductor forming the coil.
いる請求項１に記載の衝撃電流検出装置。3. The impact current detecting device according to claim 1, wherein the coil is formed of a covering member.
る複数の電流トランスにより構成されている請求項１に
記載の衝撃電流検出装置。4. The impact current detecting device according to claim 1, wherein said current detecting means comprises a plurality of current transformers having different magnetic saturation amounts.
形状の磁性材が挿通されている請求項１に記載の衝撃電
流検出装置。5. The impact current detecting device according to claim 1, wherein a magnetic material having a shape substantially matching the ring is inserted through the coil.
る請求項５に記載の衝撃電流検出装置。6. The impact current detecting device according to claim 5, wherein the magnetic material is made of a magnetic wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20526098A JP3355600B2 (en) | 1998-07-21 | 1998-07-21 | Shock current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20526098A JP3355600B2 (en) | 1998-07-21 | 1998-07-21 | Shock current detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000039456A JP2000039456A (en) | 2000-02-08 |
| JP3355600B2 true JP3355600B2 (en) | 2002-12-09 |
Family
ID=16504046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20526098A Expired - Fee Related JP3355600B2 (en) | 1998-07-21 | 1998-07-21 | Shock current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3355600B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017191018A (en) * | 2016-04-14 | 2017-10-19 | 日置電機株式会社 | Current measurement device |
-
1998
- 1998-07-21 JP JP20526098A patent/JP3355600B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000039456A (en) | 2000-02-08 |
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