JP2001033490A5 - - Google Patents

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Publication number
JP2001033490A5
JP2001033490A5 JP1999209850A JP20985099A JP2001033490A5 JP 2001033490 A5 JP2001033490 A5 JP 2001033490A5 JP 1999209850 A JP1999209850 A JP 1999209850A JP 20985099 A JP20985099 A JP 20985099A JP 2001033490 A5 JP2001033490 A5 JP 2001033490A5
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Japan
Prior art keywords
current transformer
core
optical
current
sensor
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JP1999209850A
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Japanese (ja)
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JP2001033490A (en
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Priority to JP11209850A priority Critical patent/JP2001033490A/en
Priority claimed from JP11209850A external-priority patent/JP2001033490A/en
Publication of JP2001033490A publication Critical patent/JP2001033490A/en
Publication of JP2001033490A5 publication Critical patent/JP2001033490A5/ja
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Description

【特許請求の範囲】
【請求項1】 電磁誘導により被測定導電体に流れる電流を検出する変流器及び前記変流器の出力を光信号に変換して電流検出信号を出力する光電流センサを具備した光変流器であって、
前記変流器は軟磁性材料を用いて形成された変流器コアと前記変流器コアに均等に巻き付けられた変流器コイルを有し、前記変流器コアには被測定導電体として三相一括交流導電線が収納されており、
前記光電流センサは、前記変流器コイルの2本の端子からの出力を入力するコイルと、環状の一部に空隙部分を有して前記コイルが巻回された軟磁性材料からなる光電流センサコアと、前記空隙部分に配置されて前記光電流センサコアによる磁界を検出するためのファラデー効果を用いた光磁界センサを有し、前記光磁界センサは前記三相一括交流導電線の零相電流に比例した信号を出力する光変流器。
【請求項2】 前記変流器は、変流器コアが分割された形状を有する分割形である請求項1記載の光変流器。
【請求項3】 前記変流器は、光電流センサコイルの巻き数が変流器コイルの巻き数以上であることを特徴とする請求項1記載の光変流器。
【請求項4】 前記変流器は、変流器コアが非磁性材料で形成され、空心形変流器である請求項1記載の光変流器。
【請求項5】 前記光電流センサが、被測定導電体に流れる電流により発生する磁界を感受しない方向に設置されている請求項1記載の光変流器。
【請求項6】 前記光電流センサが、前記変流器と一体に取り付けられて固定されている請求項1記載の光変流器。
【請求項7】 前記光磁界センサが、希土類鉄ガーネット材料を用いて形成された請求項記載の光変流器。
【請求項8】 前記変流器コアがパーマロイ材料であり、前記光電流センサコアがフェライト材料であることを特徴とする請求項記載の光変流器。
【請求項9】 前記変流器コアがフェライト材料であり、前記光電流センサコアがフェライト材料であることを特徴とする請求項記載の光変流器。
[Claims]
1. A variable light provided with the optical current sensor which outputs a current detection signal is converted into an optical signal the output of the current transformer and the current transformer for detecting a current flowing through the conductor to be measured by electromagnetic induction It ’s a current transformer ,
The current transformer has a current transformer core formed of a soft magnetic material and a current transformer coil evenly wound around the current transformer core, and the current transformer core has a conductor to be measured. Contains three-phase batch AC conductive wires
The photocurrent sensor is a photocurrent composed of a coil that inputs outputs from the two terminals of the current transformer coil and a soft magnetic material in which the coil is wound with a gap portion in a part of an annular shape. It has a sensor core and an optical magnetic field sensor arranged in the gap portion and using a Faraday effect for detecting a magnetic field by the optical current sensor core, and the optical magnetic field sensor uses the zero-phase current of the three-phase collective AC conductive wire. An optical current transformer that outputs a proportional signal.
2. The optical current transformer according to claim 1, wherein the current transformer is a divided type having a current transformer core having a divided shape.
3. The current transformer according to claim 1, wherein the current transformer has a number of turns of the photocurrent sensor coil or more of the number of turns of the current transformer coil.
4. The optical current transformer according to claim 1, wherein the current transformer is an air-core current transformer in which the current transformer core is formed of a non-magnetic material.
5. The current transformer according to claim 1, wherein the photocurrent sensor is installed in a direction in which the magnetic field generated by the current flowing through the conductor to be measured is not sensed.
6. The optical current transformer according to claim 1, wherein the photocurrent sensor is integrally attached to and fixed to the current transformer.
Wherein said optical magnetic field sensor is an optical current transformer according to claim 1 wherein formed using the rare earth iron garnet material.
Wherein said current transformer core is permalloy material, optical current transformer according to claim 1, wherein the photocurrent sensor core is ferrite material.
Wherein said current transformer core is a ferrite material, the optical current transformer according to claim 1, wherein the photocurrent sensor core is ferrite material.

【0007】
【課題を解決するための手段】
上記目的を達成するために、本発明に係る光変流器は、
電磁誘導により被測定導電体に流れる電流を検出する変流器及び前記変流器の出力を光信号に変換して電流検出信号を出力する光電流センサを具備した光変流器であって、
前記変流器は軟磁性材料を用いて形成された変流器コアと前記変流器コアに均等に巻き付けられた変流器コイルを有し、前記変流器コアには被測定導電体として三相一括交流導電線が収納されており、
前記光電流センサは、前記変流器コイルの2本の端子からの出力を入力するコイルと、環状の一部に空隙部分を有して前記コイルが巻回された軟磁性材料からなる光電流センサコアと、前記空隙部分に配置されて前記光電流センサコアによる磁界を検出するためのファラデー効果を用いた光磁界センサを有し、前記光磁界センサは前記三相一括交流導電線の零相電流に比例した信号を出力する。
上記のように構成された本発明の光変流器は、外部磁界の影響を受けることなく、三相一括交流導電線の零相電流を高精度に測定し、測定精度と感度を高めることができる。
0007
[Means for solving problems]
In order to achieve the above object, the optical current transformer according to the present invention is
An optical current transformer provided with the light current sensor for outputting a current detection signal is converted into an optical signal the output of the current transformer and the current transformer for detecting a current flowing through the conductor to be measured by electromagnetic induction ,
The current transformer has a current transformer core formed of a soft magnetic material and a current transformer coil evenly wound around the current transformer core, and the current transformer core has a conductor to be measured. Contains three-phase batch AC conductive wires
The photocurrent sensor is a photocurrent composed of a coil that inputs outputs from the two terminals of the current transformer coil and a soft magnetic material in which the coil is wound with a gap portion in a part of an annular shape. It has a sensor core and an optical magnetic field sensor that is arranged in the gap portion and uses a Faraday effect for detecting a magnetic field by the optical current sensor core, and the optical magnetic field sensor uses the zero-phase current of the three-phase collective AC conductive wire. Outputs a proportional signal.
The current transformer of the present invention configured as described above can measure the zero-phase current of a three-phase batch AC conductive wire with high accuracy without being affected by an external magnetic field, and can improve the measurement accuracy and sensitivity. it can.

発明に係る光変流器において、前記変流器は変流器コアが分割された形状を有してもよい。
本発明に係る光変流器において、前記変流器は光電流センサコイルの巻き数が変流器コイルの巻き数以上であることが好ましい。
本発明に係る光変流器において、前記変流器は変流器コアが非磁性材料で形成され、空心形変流器であってもよい。
本発明に係る光変流器において、前記光電流センサが被測定導電体に流れる電流により発生する磁界を感受しない方向に設置されることが好ましい。
本発明に係る光変流器は、前記光電流センサが前記変流器と一体に取り付けられ、固定されていてもよい。
In the optical current transformer according to the present invention, the current transformer may have a shape in which the current transformer core is divided.
In the current transformer according to the present invention, it is preferable that the number of turns of the photocurrent sensor coil of the current transformer is equal to or greater than the number of turns of the current transformer coil.
In the optical current transformer according to the present invention, the current transformer core may be made of a non-magnetic material and may be an air-core current transformer.
In the current transformer according to the present invention, it is preferable that the photocurrent sensor is installed in a direction that does not sense the magnetic field generated by the current flowing through the conductor to be measured.
In the current transformer according to the present invention, the photocurrent sensor may be integrally attached to and fixed to the current transformer.

発明に係る光変流器は、前記光磁界センサが希土類鉄ガーネット材料を用いて形成してもよい。
本発明に係る光変流器は、前記変流器コアがパーマロイ材料であってもよく、前記光電流センサコアがフェライト材料であってもよい。
そして、本発明に係る光変流器は、前記変流器コアがフェライト材料であってもよく、前記光電流センサコアもフェライト材料であってもよい。
In the current transformer according to the present invention, the optical magnetic field sensor may be formed by using a rare earth iron garnet material.
In the phototransformer according to the present invention, the current transformer core may be made of a permalloy material, or the photocurrent sensor core may be made of a ferrite material.
In the current transformer according to the present invention, the current transformer core may be made of a ferrite material, and the photocurrent sensor core may also be made of a ferrite material.

JP11209850A 1999-07-23 1999-07-23 Optical current transformer Withdrawn JP2001033490A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11209850A JP2001033490A (en) 1999-07-23 1999-07-23 Optical current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11209850A JP2001033490A (en) 1999-07-23 1999-07-23 Optical current transformer

Publications (2)

Publication Number Publication Date
JP2001033490A JP2001033490A (en) 2001-02-09
JP2001033490A5 true JP2001033490A5 (en) 2006-06-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP11209850A Withdrawn JP2001033490A (en) 1999-07-23 1999-07-23 Optical current transformer

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004301770A (en) * 2003-03-31 2004-10-28 Toshiba Corp Protection system, and photoelectric current measuring instrument used therefor
KR100659236B1 (en) 2005-09-16 2006-12-20 시영전기 주식회사 Current transformer for high voltage power line
CN102945745A (en) * 2012-11-21 2013-02-27 保定天威互感器有限公司 Standard current transformer of composite error
CN103063896B (en) * 2012-12-20 2015-10-21 中国科学院西安光学精密机械研究所 Sensing fiber ring and shock type Sagnac formula all-fiber current transformator
CN104391157B (en) * 2014-11-25 2018-01-23 贵州电力试验研究院 Column support type all-fiber current transformator with gold utensil
CN104576004B (en) * 2015-01-08 2016-12-07 大连第二互感器集团有限公司 A kind of electric-power metering voltage transformer of deferrable load
CN105486904B (en) * 2015-11-20 2018-03-13 哈尔滨工业大学 Dichotomic type optical current sensor

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