JPH06194388A - Current detector - Google Patents
Current detectorInfo
- Publication number
- JPH06194388A JPH06194388A JP4346454A JP34645492A JPH06194388A JP H06194388 A JPH06194388 A JP H06194388A JP 4346454 A JP4346454 A JP 4346454A JP 34645492 A JP34645492 A JP 34645492A JP H06194388 A JPH06194388 A JP H06194388A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- current
- conductor
- detection element
- band
- 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.)
- Pending
Links
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、導体を囲むように形
成された磁路の一部に空隙を設け、この空隙内に磁気検
出素子を挿入して上記導体に流れる電流を検出するよう
にした電流検出器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a gap in a part of a magnetic path formed so as to surround a conductor, and a magnetic detecting element is inserted into the gap to detect a current flowing through the conductor. The present invention relates to a current detector.
【０００２】[0002]
【従来の技術】図１３は、従来の電流検出器を示す構成
図である。図において、１は被検出電流母線、２は被検
出電流母線１を囲んで配置した磁路の一部分に空隙３を
有する環状形磁性帯、４は該環状形磁性帯２の空隙３に
挿入されたホール素子などの磁気を電気に変換する磁気
検出素子、５は磁気検出素子４で検出した電圧を増幅す
る増幅器、６は磁気検出素子４と増幅器５を接続する信
号線、７は増幅器５の出力端子である。2. Description of the Related Art FIG. 13 is a block diagram showing a conventional current detector. In the figure, reference numeral 1 is a detected current busbar, 2 is an annular magnetic band having a void 3 in a part of a magnetic path arranged around the detected current busbar 1, and 4 is inserted in the void 3 of the annular magnetic band 2. A magnetic detection element for converting magnetism into electricity, such as a Hall element, 5 an amplifier for amplifying the voltage detected by the magnetic detection element 4, 6 a signal line connecting the magnetic detection element 4 and the amplifier 5, and 7 an amplifier 5 It is an output terminal.
【０００３】次に動作について説明する。被検出電流母
線１に流れる電流により、環状形磁性帯２内には電流に
比例した磁束Φが生じ、この磁束Φが環状形磁性帯２の
空隙３に配置された磁気検出素子４を貫通する。磁気検
出素子４を貫通する磁束Φは、環状形磁性帯２の磁気抵
抗をＲｍ、空隙３の磁気抵抗をＲｇ、被検出電流母線１
に流れる電流をＩとすると、 Φ＝Ｉ／（Ｒｍ＋Ｒｇ） となる。従って、磁束Φは被検出電流Ｉに比例する。磁
気検出素子４は、この磁束Φに比例した微少な電圧ｅを
発生し、増幅器５により必要な大きさに増幅され、被検
出電流母線１に流れる電流に比例した電圧を出力端子７
に送出する。Next, the operation will be described. A magnetic flux Φ proportional to the current is generated in the annular magnetic band 2 by the current flowing through the detected current bus 1, and the magnetic flux Φ penetrates the magnetic detection element 4 arranged in the void 3 of the annular magnetic band 2. . The magnetic flux Φ penetrating the magnetic detection element 4 has a magnetic resistance of the annular magnetic band 2 of Rm, a magnetic resistance of the air gap 3 of Rg, and a detected current busbar 1
Let I be the current that flows in Φ = I / (Rm + Rg). Therefore, the magnetic flux Φ is proportional to the detected current I. The magnetic detection element 4 generates a minute voltage e proportional to this magnetic flux Φ, is amplified to a required magnitude by the amplifier 5, and outputs a voltage proportional to the current flowing through the detected current bus 1 to the output terminal 7
Send to.
【０００４】[0004]
【発明が解決しようとする課題】以上のように構成され
た従来の電流検出器は、通常の動作時には何ら問題を生
じないが、被検出電流母線１の電圧が急変動した場合、
その変動が電磁ノイズとなって磁気検出素子４で検出さ
れ、測定電流に誤差を生じてしまうという問題があっ
た。The conventional current detector configured as described above does not cause any problem during normal operation, but when the voltage of the detected current bus 1 suddenly changes,
There is a problem that the fluctuation becomes electromagnetic noise and is detected by the magnetic detection element 4, and an error occurs in the measured current.
【０００５】この発明は、上記のような問題を解決する
ためになされたもので、被検出電流母線の電圧が急変動
した場合に、被測定電流の誤差を小さくすることのでき
る電流検出器を提供することを目的とするものである。The present invention has been made to solve the above problems, and provides a current detector capable of reducing the error in the measured current when the voltage of the detected current bus suddenly changes. It is intended to be provided.
【０００６】[0006]
【課題を解決するための手段】この発明に係る電流検出
器は、被検出電流が流れる導体を囲むように形成された
磁路の一部に空隙を設け、該空隙内に磁気検出素子を挿
入して上記被検出電流を検出するようにした電流検出器
において、上記磁路の少なくとも内周面を非磁性導体で
覆い、この非磁性導体を接地などの安定した電位や磁気
検出素子に影響を与えない電位に接続したものである。In the current detector according to the present invention, a gap is provided in a part of a magnetic path formed so as to surround a conductor through which a current to be detected flows, and a magnetic detection element is inserted into the gap. Then, in the current detector designed to detect the current to be detected, at least the inner peripheral surface of the magnetic path is covered with a non-magnetic conductor, and this non-magnetic conductor is affected by a stable potential such as ground or a magnetic detection element. It is connected to a potential not applied.
【０００７】また、被検出電流が流れる導体を囲むよう
に形成された巻鉄心磁性帯の一部に空隙を設け、該空隙
内に磁気検出素子を挿入して上記被検出電流を検出する
ようにした電流検出器において、上記空隙によって切断
された巻鉄心磁性帯の各層間を絶縁し、この層間絶縁さ
れた巻鉄心磁性帯の内側の磁性帯を接地などの安定した
電位や磁気検出素子に影響を与えない電位に接続したも
のである。Further, an air gap is provided in a part of the magnetic core magnetic band formed so as to surround the conductor through which the current to be detected flows, and a magnetic detecting element is inserted into the air gap to detect the current to be detected. In the current detector, the layers of the wound magnetic core magnetic band cut by the air gap are insulated from each other, and the magnetic band inside the wound magnetic layer of the wound core is affected by a stable potential such as ground or a magnetic detection element. Is connected to a potential that does not give.
【０００８】また、被検出電流が流れる導体を囲むよう
に形成された環状形磁帯の一部に空隙を設け、該空隙内
に磁気検出素子を挿入して上記被検出電流を検出するよ
うにした電流検出器において、上記磁気検出素子を非磁
性導体で覆い、この非磁性導体を接地などの安定した電
位や磁気検出素子に影響を与えない電位に接続したもの
である。Further, a gap is provided in a part of the annular magnetic band formed so as to surround the conductor through which the current to be detected flows, and a magnetic detecting element is inserted into the gap so as to detect the current to be detected. In the above current detector, the magnetic detection element is covered with a non-magnetic conductor, and the non-magnetic conductor is connected to a stable potential such as ground or a potential that does not affect the magnetic detection element.
【０００９】[0009]
【作用】上記のように構成された電流検出器では、非磁
性導体または巻鉄心磁性帯の内側の磁性帯が電磁シール
ドとなる。したがって、被検出電流母線の電圧が急変し
て電磁ノイズが発生しても、このノイズは非磁性導体ま
たは巻鉄心磁性帯の内側の磁性帯でシールドされて接地
などの安定した電位に逃がされる。このため、被検出電
流母線の電圧が急変した場合でも、この電圧変動が磁気
検出素子に影響を与えることがなくなり、被検出電流を
精度良く測定することができる。In the current detector configured as described above, the magnetic band inside the non-magnetic conductor or the magnetic core of the wound core serves as an electromagnetic shield. Therefore, even if the voltage of the detected current bus suddenly changes and electromagnetic noise is generated, this noise is shielded by the magnetic band inside the magnetic band of the non-magnetic conductor or the winding core and is released to a stable potential such as ground. Therefore, even when the voltage of the detected current bus suddenly changes, this voltage fluctuation does not affect the magnetic detection element, and the detected current can be accurately measured.
【００１０】[0010]
【実施例】 実施例１．図１および図２にこの発明の第１の実施例を
示す。図において、１は被検出電流 母線、２は被検出
電流母線１を囲んで配置した磁路の一部分に空隙３を有
する環状形磁性帯、４は該環状形磁性帯２の空隙３に挿
入されたホール素子などの磁気を電気に変換する磁気検
出素子、５は磁気検出素子４で検出した電圧を増幅する
増幅器、６は磁気検出素子４と増幅器５を接続する信号
線、７は増幅器５の出力端子、８は環状形磁性帯２の内
周面に配置された非磁性導体、９は非磁性導体８に接続
された端子、１０は端子９を接続する接地である。EXAMPLES Example 1. 1 and 2 show a first embodiment of the present invention. In the figure, 1 is a current bus to be detected, 2 is an annular magnetic band having a void 3 in a part of a magnetic path arranged surrounding the current bus 1 to be detected, and 4 is inserted into the void 3 of the annular magnetic band 2. A magnetic detection element for converting magnetism into electricity, such as a Hall element, 5 an amplifier for amplifying the voltage detected by the magnetic detection element 4, 6 a signal line connecting the magnetic detection element 4 and the amplifier 5, and 7 an amplifier 5 An output terminal, 8 is a non-magnetic conductor arranged on the inner peripheral surface of the annular magnetic band 2, 9 is a terminal connected to the non-magnetic conductor 8, and 10 is a ground for connecting the terminal 9.
【００１１】次に動作について説明する。被検出電流母
線１に流れる電流により、環状形磁性帯２内には電流に
比例した磁束Φが生じ、この磁束Φが環状形磁性帯２の
空隙３に配置された磁気検出素子４を貫通する。磁気検
出素子４を貫通する磁束Φは、環状形磁性帯２の磁気抵
抗をＲｍ、空隙３の磁気抵抗をＲｇ、被検出電流母線１
に流れる電流をＩとすると、前述したように、 Φ＝Ｉ／（Ｒｍ＋Ｒｇ） となる。従って、磁束Φは被検出電流Ｉに比例する。磁
気検出素子４は、この磁束Φに比例した微少な電圧ｅを
発生し、増幅器５により必要な大きさに増幅され、被検
出電流母線１に流れる電流に比例した電圧を出力端子７
に送出する。Next, the operation will be described. A magnetic flux Φ proportional to the current is generated in the annular magnetic band 2 by the current flowing through the detected current bus 1, and the magnetic flux Φ penetrates the magnetic detection element 4 arranged in the void 3 of the annular magnetic band 2. . The magnetic flux Φ penetrating the magnetic detection element 4 has a magnetic resistance of the annular magnetic band 2 of Rm, a magnetic resistance of the air gap 3 of Rg, and a detected current busbar 1
Assuming that the current flowing through the I is I, as described above, Φ = I / (Rm + Rg). Therefore, the magnetic flux Φ is proportional to the detected current I. The magnetic detection element 4 generates a minute voltage e proportional to this magnetic flux Φ, is amplified to a required magnitude by the amplifier 5, and outputs a voltage proportional to the current flowing through the detected current bus 1 to the output terminal 7
Send to.
【００１２】被検出電流母線１の電圧が急変動した場
合、この電圧変動により電磁ノイズが発生するが、この
ノイズは環状形磁性帯１との間に配置された非磁性導体
８によりシールドされ、端子９から接地１０に逃がされ
る。このため、磁気検出素子４には被検出電流分の信号
のみとなり、被測定電流の誤差を小さくすることができ
る。When the voltage of the detected current bus 1 fluctuates abruptly, electromagnetic noise is generated due to this voltage fluctuation, and this noise is shielded by the non-magnetic conductor 8 arranged between the annular magnetic band 1 and It escapes from the terminal 9 to the ground 10. Therefore, the magnetic detection element 4 has only a signal corresponding to the detected current, and the error in the measured current can be reduced.
【００１３】実施例２．図３および図４にこの発明の第
２の実施例を示す。上記実施例１では、非磁性導体８を
環状形磁性帯２の内周面にのみ設置したが、実施例２
は、図３および図４に示すように、環状形磁性帯２の内
周面と左右の両側面を覆うように非磁性導体１１を配置
するとともに、外周面中央に断路部１１ａを設け、環状
形磁性帯２の全面が非磁性導体１１で覆われることのな
いようにしたものである。このように構成した場合、上
記実施例１と同様の効果を奏するとともに、被検出電流
母線１以外の電線が近くに配置された場合でも、被測定
電流の誤差を小さくすることができる。Example 2. 3 and 4 show a second embodiment of the present invention. In the first embodiment, the non-magnetic conductor 8 is installed only on the inner peripheral surface of the annular magnetic band 2, but
As shown in FIGS. 3 and 4, the non-magnetic conductor 11 is arranged so as to cover the inner peripheral surface and the left and right side surfaces of the annular magnetic band 2, and the disconnection portion 11a is provided at the center of the outer peripheral surface of the annular magnetic band 2. The entire surface of the shaped magnetic band 2 is prevented from being covered with the non-magnetic conductor 11. With this configuration, the same effect as that of the first embodiment can be obtained, and the error of the measured current can be reduced even when the electric wires other than the detected current busbar 1 are arranged nearby.
【００１４】実施例３．図５および図６にこの発明の第
３の実施例を示す。上記実施例１では、非磁性導体８を
板状としたが、実施例３は、図５および図６に示すよう
に、非磁性導体１２の角部に丸みを持たせた筒体とした
ものである。このように構成した場合、実施例１と同様
の効果を奏するとともに、被検出電流母線１が高電圧の
場合でも角部に電荷が集中せず、コロナ放電の発生が抑
えられる。また、非磁性導体１２の構造が簡単であるの
で、小形にできる。Example 3. 5 and 6 show a third embodiment of the present invention. In the first embodiment, the non-magnetic conductor 8 has a plate shape, but in the third embodiment, as shown in FIGS. 5 and 6, the non-magnetic conductor 12 has a cylindrical body with rounded corners. Is. With this configuration, the same effect as that of the first embodiment is achieved, and even when the current bus 1 to be detected has a high voltage, electric charges are not concentrated at the corners, and the occurrence of corona discharge is suppressed. Moreover, since the non-magnetic conductor 12 has a simple structure, it can be made small.
【００１５】実施例４．図７にこの発明の第４の実施例
を示す。上記実施例２では、環状形磁性帯２の内周面と
左右の両側面を覆うように非磁性導体１１を配置すると
ともに、外周面中央に断路部１１ａを設けたが、実施例
４は、この非磁性導体１１の角部に丸い非磁性導体１
３，１４を配置し、この非磁性導体１３，１４を非磁性
導体１１に電気的に接続したものである。このように構
成した場合、実施例３と同様の効果を奏するとともに、
丸い非磁性帯１３，１４を内側に巻くだけで済むので構
造が簡単となる。また、非検出電流母線１以外の電線が
近くに配置された場合でも、被測定電流の誤差を小さく
することができる。Example 4. FIG. 7 shows a fourth embodiment of the present invention. In the second embodiment, the non-magnetic conductor 11 is arranged so as to cover the inner peripheral surface and the left and right side surfaces of the annular magnetic band 2, and the disconnection portion 11a is provided at the center of the outer peripheral surface. A round non-magnetic conductor 1 is provided at the corner of this non-magnetic conductor 11.
3 and 14 are arranged, and the nonmagnetic conductors 13 and 14 are electrically connected to the nonmagnetic conductor 11. When configured in this way, the same effects as in Example 3 are obtained, and
The structure is simple because it is sufficient to wind the round non-magnetic strips 13 and 14 inside. Further, even when an electric wire other than the non-detection current bus bar 1 is arranged nearby, the error of the measured current can be reduced.
【００１６】実施例５．図８にこの発明の第５の実施例
を示す。上記実施例１では、非磁性導体８を環状形磁性
帯２の内周面に配置し、この被磁性導体８を端子９を通
じて接地１０に接続したが、実施例５は、図８に示すよ
うに、磁路として巻鉄心磁性帯１５を用い、この巻鉄心
磁性帯１５の切断面にエッチングなどを施すことによっ
て各層間を絶縁し、この層間絶縁された巻鉄心磁性帯１
５の内側の磁性帯１６を端子９に接続し、接地１０に接
続するようにしたものである。このように構成した場
合、実施例１と同様の効果を奏するとともに、実施例１
のような専用の非磁性導体８を使用しないので、小形に
できる。Example 5. FIG. 8 shows a fifth embodiment of the present invention. In the first embodiment, the non-magnetic conductor 8 is arranged on the inner peripheral surface of the annular magnetic band 2, and the magnetic conductor 8 is connected to the ground 10 through the terminal 9. However, the fifth embodiment is as shown in FIG. In addition, a wound core magnetic band 15 is used as a magnetic path, and a cut surface of the wound core magnetic band 15 is etched to insulate each layer from each other.
The magnetic strip 16 inside 5 is connected to the terminal 9 and is connected to the ground 10. When configured in this manner, the same effects as those of the first embodiment are achieved, and the first embodiment
Since a dedicated non-magnetic conductor 8 such as is not used, it can be made small.
【００１７】実施例６．図９にこの発明の第６の実施例
を示す。上記実施例５では、層間を絶縁された内側の磁
性帯１６を端子９を介して接地１０に接続したが、実施
例６は、図９に示すように、この巻鉄心磁性帯１５の絶
縁された内側の磁性帯１６の角部に丸い非磁性帯１３，
１４を配置し、この非磁性帯１３，１４を磁性帯１６に
電気的に接続したものである。このように構成した場
合、実施例３と同様の効果を奏するとともに、丸い非磁
性帯１３，１４を内側に巻いた簡単な構造であり、ま
た、実施例１のような専用の非磁性導体８を使用しない
ので、小形にできる。Embodiment 6. FIG. 9 shows a sixth embodiment of the present invention. In the above-described fifth embodiment, the inner magnetic strip 16 having the interlayer insulation is connected to the ground 10 via the terminal 9, but in the sixth embodiment, as shown in FIG. 9, the winding iron core magnetic strip 15 is insulated. A round non-magnetic band 13 at the corner of the inner magnetic band 16,
14 is arranged and the non-magnetic bands 13 and 14 are electrically connected to the magnetic band 16. When configured in this way, the same effects as those of the third embodiment are obtained, and the simple structure in which the round nonmagnetic bands 13 and 14 are wound inside is also provided, and the dedicated nonmagnetic conductor 8 as in the first embodiment is used. Since it does not use, it can be made smaller.
【００１８】実施例７．図１０，図１１にこの発明の第
７の実施例を示す。上記実施例１では、非磁性導体８を
環状形磁性帯２の内周面に設置したが、実施例７は、図
１０に示すように、磁気検出素子４を非磁性導体１７で
覆い、この非磁性導体１７を端子９に接続し、接地１０
に接続したものである。このように構成した場合、実施
例１と同様の効果を奏するとともに、被検出電流母線１
以外の電線が近くに配置された場合でも、被測定電流の
誤差を小さくすることができる。また、実施例１のよう
な専用の非磁性導体８を使用しないので、小形にでき
る。Example 7. 10 and 11 show a seventh embodiment of the present invention. In the first embodiment, the non-magnetic conductor 8 is installed on the inner peripheral surface of the annular magnetic band 2, but in the seventh embodiment, the magnetic detection element 4 is covered with the non-magnetic conductor 17 as shown in FIG. The non-magnetic conductor 17 is connected to the terminal 9 and grounded 10.
Connected to. With such a configuration, the same effect as that of the first embodiment is obtained, and the detected current bus 1
Even when the electric wires other than the above are arranged nearby, the error of the measured current can be reduced. Further, since the dedicated non-magnetic conductor 8 as in the first embodiment is not used, the size can be reduced.
【００１９】実施例８．図１２にこの発明の第８の実施
例を示す。なお、上記各実施例では、環状形磁性帯２と
して角形のものを使用したが、図１２に示すように、丸
形の環状形磁性帯１８を用い、その一部分に空隙１９を
形成してもよい。なお、この発明で用いる環状形磁性帯
２，１８としては、フェライト、アモルファス鉄心、パ
ーマロイなど、公知のすべての磁性材で構成するものを
含む。Example 8. FIG. 12 shows the eighth embodiment of the present invention. In each of the above-mentioned embodiments, the annular magnetic band 2 has a rectangular shape, but as shown in FIG. 12, a circular annular magnetic band 18 is used and a void 19 may be formed in a part thereof. Good. The annular magnetic bands 2 and 18 used in the present invention include those made of all known magnetic materials such as ferrite, amorphous iron core and permalloy.
【００２０】[0020]
【発明の効果】以上述べたように、請求項１の発明によ
れば、磁路の少なくとも内周面を非磁性導体で覆い、こ
の非磁性導体を接地などの安定した電位や磁気検出素子
に影響を与えない電位に接続したしたので、被検出電流
母線の電圧急変により発生したノイズを非磁性導体でシ
ールドすることができ、従来のように電圧急変時に発生
するノイズが磁気検出素子に影響を及ぼすことがなくな
り、被検出電流を精度良く測定することができる。As described above, according to the first aspect of the present invention, at least the inner peripheral surface of the magnetic path is covered with a non-magnetic conductor, and the non-magnetic conductor is used as a stable potential such as ground or a magnetic detection element. Since it is connected to a potential that does not affect the noise, it is possible to shield the noise generated by the sudden change in the voltage of the detected current bus with a non-magnetic conductor, and the noise generated when the voltage changes suddenly affects the magnetic detection element as in the past. Since it does not affect, the detected current can be accurately measured.
【００２１】また、請求項２の発明によれば、空隙によ
って切断された巻鉄心磁性帯の各層間を絶縁し、この層
間絶縁された巻鉄心磁性帯の内側の磁性帯を接地などの
安定した電位や磁気検出素子に影響を与えない電位に接
続したので、上記請求項１の発明と同様の効果を奏する
ことができるとともに、巻鉄心磁性帯の内側磁性帯のみ
で構成しているため、小形化を図ることができる。According to the second aspect of the present invention, the layers of the wound magnetic core magnetic band cut by the air gap are insulated from each other, and the magnetic band inside the interlayer insulated magnetic core magnetic band is stabilized by grounding or the like. Since it is connected to a potential that does not affect the potential or the magnetic detection element, the same effect as that of the invention of claim 1 can be obtained, and since it is composed only of the inner magnetic band of the wound iron core magnetic band, it is small in size. Can be realized.
【００２２】また、請求項３の発明によれば、磁気検出
素子を非磁性導体で覆い、この非磁性導体を接地などの
安定した電位や磁気検出素子に影響を与えない電位に接
続したので、上記請求項１の発明と同様の効果を奏する
ことができるとともに、被検出電流母線以外の電線が近
くに配置された場合でも、被測定電流の誤差を小さくす
ることができ、また、磁気検出素子を非磁性導体で覆う
だけ済むため、小形化を図ることができる。Further, according to the invention of claim 3, the magnetic detection element is covered with a non-magnetic conductor, and the non-magnetic conductor is connected to a stable potential such as ground or a potential that does not affect the magnetic detection element. It is possible to obtain the same effect as the invention of claim 1 above, and it is possible to reduce the error in the measured current even when an electric wire other than the detected current busbar is arranged in the vicinity, and the magnetic detection element is also provided. Since only the non-magnetic conductor needs to be covered, the size can be reduced.
【図１】この発明の第１の実施例による電流検出器を示
す構成図である。FIG. 1 is a configuration diagram showing a current detector according to a first embodiment of the present invention.
【図２】上記第１の実施例の環状形磁性帯と非磁性導体
を示す図である。FIG. 2 is a diagram showing an annular magnetic band and a non-magnetic conductor according to the first embodiment.
【図３】この発明の第２の実施例による電流検出器を示
す構成図である。FIG. 3 is a configuration diagram showing a current detector according to a second embodiment of the present invention.
【図４】上記第２の実施例の環状形磁性帯と非磁性導体
を示す図である。FIG. 4 is a diagram showing an annular magnetic band and a non-magnetic conductor according to the second embodiment.
【図５】この発明の第３の実施例の環状形磁性帯と非磁
性導体を示す図である。FIG. 5 is a diagram showing an annular magnetic band and a non-magnetic conductor according to a third embodiment of the present invention.
【図６】上記第３の実施例の環状形磁性帯と非磁性導体
を示す平面断面図である。FIG. 6 is a plan sectional view showing an annular magnetic band and a non-magnetic conductor according to the third embodiment.
【図７】この発明の第４の実施例の環状形磁性帯と非磁
性導体を示す平面断面図である。FIG. 7 is a plan sectional view showing an annular magnetic band and a non-magnetic conductor according to a fourth embodiment of the present invention.
【図８】この発明の第５の実施例の巻鉄心磁性帯を示す
図である。FIG. 8 is a diagram showing a wound iron core magnetic band according to a fifth embodiment of the present invention.
【図９】この発明の第６の実施例の巻鉄心磁性帯と非磁
性導体を示す平面断面図である。FIG. 9 is a plan sectional view showing a wound magnetic core magnetic band and a non-magnetic conductor according to a sixth embodiment of the present invention.
【図１０】この発明の第７の実施例による電流検出器を
示す構成図である。FIG. 10 is a configuration diagram showing a current detector according to a seventh embodiment of the present invention.
【図１１】上記第７の実施例の環状形磁性帯と非磁性導
体と磁気検出素子を示す正面断面図である。FIG. 11 is a front sectional view showing an annular magnetic band, a non-magnetic conductor and a magnetic detection element of the seventh embodiment.
【図１２】この発明の第８の実施例に使用する環状形磁
性帯を示す図である。FIG. 12 is a diagram showing an annular magnetic band used in an eighth embodiment of the present invention.
【図１３】従来の電流検出器を示す構成図である。FIG. 13 is a configuration diagram showing a conventional current detector.
１ 非検出電流母線 ２ 環状形磁性帯 ３ 空隙 ４ 磁気検出素子 ５ 増幅器 ６ 電線 ７ 出力端子 ８ 非磁性導体 ９ 端子 １０ 接地 １１ 非磁性導体 １２ 非磁性導体 １３ 非磁性導体 １４ 非磁性導体 １５ 巻鉄心磁性帯 １７ 非磁性導体 １８ 環状形磁性帯 １９ 空隙 1 non-detection current bus 2 annular magnetic band 3 air gap 4 magnetic detection element 5 amplifier 6 wire 7 output terminal 8 non-magnetic conductor 9 terminal 10 ground 11 non-magnetic conductor 12 non-magnetic conductor 13 non-magnetic conductor 14 non-magnetic conductor 15 wound iron core Magnetic band 17 Non-magnetic conductor 18 Annular magnetic band 19 Void
Claims (3)
成された磁路の一部に空隙を設け、該空隙内に磁気検出
素子を挿入して上記被検出電流を検出するようにした電
流検出器において、 上記磁路の少なくとも内周面を非磁性導体で覆い、 この非磁性導体を接地などの安定した電位や磁気検出素
子に影響を与えない電位に接続したことを特徴とする電
流検出器。1. A current in which a magnetic detection path is formed by surrounding a conductor through which a current to be detected is provided, and a magnetic detection element is inserted into the air gap to detect the current to be detected. In a detector, at least the inner peripheral surface of the magnetic path is covered with a non-magnetic conductor, and the non-magnetic conductor is connected to a stable potential such as ground or a potential that does not affect the magnetic detection element. vessel.
成された巻鉄心磁性帯の一部に空隙を設け、該空隙内に
磁気検出素子を挿入して上記被検出電流を検出するよう
にした電流検出器において、 上記空隙によって切断された巻鉄心磁性帯の各層間を絶
縁し、 この層間絶縁された巻鉄心磁性帯の内側の磁性帯を接地
などの安定した電位や磁気検出素子に影響を与えない電
位に接続したことを特徴とする電流検出器。2. An air gap is provided in a part of a wound iron core magnetic band formed so as to surround a conductor through which a current to be detected flows, and a magnetic detection element is inserted into the air gap to detect the current to be detected. In the current detector, the layers of the wound magnetic core magnetic band cut by the air gap are insulated from each other, and the magnetic band inside the wound magnetic layer of the wound core is affected by a stable potential such as ground or a magnetic detection element. A current detector characterized in that the current detector is connected to a potential that does not apply a voltage.
成された環状形磁帯の一部に空隙を設け、該空隙内に磁
気検出素子を挿入して上記被検出電流を検出するように
した電流検出器において、 上記磁気検出素子を非磁性導体で覆い、 この非磁性導体を接地などの安定した電位や磁気検出素
子に影響を与えない電位に接続したことを特徴とする電
流検出器。3. A gap is provided in a part of an annular magnetic band formed so as to surround a conductor through which a current to be detected flows, and a magnetic detection element is inserted into the gap to detect the current to be detected. In the current detector, the magnetic detection element is covered with a nonmagnetic conductor, and the nonmagnetic conductor is connected to a stable potential such as ground or a potential that does not affect the magnetic detection element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4346454A JPH06194388A (en) | 1992-12-25 | 1992-12-25 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4346454A JPH06194388A (en) | 1992-12-25 | 1992-12-25 | Current detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06194388A true JPH06194388A (en) | 1994-07-15 |
Family
ID=18383546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4346454A Pending JPH06194388A (en) | 1992-12-25 | 1992-12-25 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06194388A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009151011A1 (en) * | 2008-06-10 | 2009-12-17 | 株式会社タムラ製作所 | Current sensor |
| JP2011007596A (en) * | 2009-06-25 | 2011-01-13 | Tamura Seisakusho Co Ltd | Current sensor |
| JP2011099751A (en) * | 2009-11-05 | 2011-05-19 | Kawamura Electric Inc | Current detector |
| JP2019105546A (en) * | 2017-12-13 | 2019-06-27 | 富士電機メーター株式会社 | Current sensor and watt-hour meter |
| WO2023282271A1 (en) * | 2021-07-05 | 2023-01-12 | シチズンファインデバイス株式会社 | Magnetic field sensor head and magnetic field sensor device |
-
1992
- 1992-12-25 JP JP4346454A patent/JPH06194388A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009151011A1 (en) * | 2008-06-10 | 2009-12-17 | 株式会社タムラ製作所 | Current sensor |
| JP2009300123A (en) * | 2008-06-10 | 2009-12-24 | Tamura Seisakusho Co Ltd | Current sensor |
| JP2011007596A (en) * | 2009-06-25 | 2011-01-13 | Tamura Seisakusho Co Ltd | Current sensor |
| JP2011099751A (en) * | 2009-11-05 | 2011-05-19 | Kawamura Electric Inc | Current detector |
| JP2019105546A (en) * | 2017-12-13 | 2019-06-27 | 富士電機メーター株式会社 | Current sensor and watt-hour meter |
| WO2023282271A1 (en) * | 2021-07-05 | 2023-01-12 | シチズンファインデバイス株式会社 | Magnetic field sensor head and magnetic field sensor device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6563296B2 (en) | Closely-coupled multiple-winding magnetic induction-type sensor | |
| US4810989A (en) | Transformer system for measuring electrical current | |
| JPS61245511A (en) | Dc and ac current transformer | |
| JPH0634227U (en) | Current sensor for medium and high voltage | |
| JPH01206268A (en) | Current detector | |
| JPS63191069A (en) | Current detector | |
| US11079424B2 (en) | Combined low frequency and high frequency current sensor | |
| JP2001281270A (en) | Split type current detector | |
| JPH06194388A (en) | Current detector | |
| JPH10232259A (en) | Current leakage sensor | |
| US4477768A (en) | Leakage current detecting structure | |
| CA2152891A1 (en) | Current-transformer for a metal-enclosed gas-insulated high-voltage installation | |
| JP3145854B2 (en) | Current transformer device and insulated conductor device | |
| JPH09210610A (en) | High-frequency excitation differential transformer for preventing influence of external magnetism and metal, etc. | |
| JP2000199770A (en) | Low-noise multicore parallel-cord current detector | |
| JP2600548B2 (en) | Transformer | |
| JPH0161007B2 (en) | ||
| JPH01240867A (en) | Current detector | |
| JPH0278974A (en) | Electric apparatus | |
| JP4935568B2 (en) | Zero phase current transformer | |
| JP2593447Y2 (en) | Noiseless ground wire | |
| JPH02297077A (en) | Detector for abnormality of electric apparatus | |
| JP2579195Y2 (en) | Current detector | |
| JP3295607B2 (en) | Partial discharge measurement method | |
| JPH03223678A (en) | Transmission line current sensor |