JPS6312971A - Current detector - Google Patents
Current detectorInfo
- Publication number
- JPS6312971A JPS6312971A JP61156983A JP15698386A JPS6312971A JP S6312971 A JPS6312971 A JP S6312971A JP 61156983 A JP61156983 A JP 61156983A JP 15698386 A JP15698386 A JP 15698386A JP S6312971 A JPS6312971 A JP S6312971A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- core
- fixing plate
- magnetic
- magnetic gap
- 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
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000004804 winding Methods 0.000 abstract description 6
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、モータ、インバータ等における主電流路の電
流を絶縁、かつ電圧変換して検出する電流検出器に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a current detector that detects a current in a main current path in a motor, inverter, etc. by insulating it and converting it into a voltage.
（従来技術およびその問題自）
従来、この種の電流検出器は、第４図に示すように、磁
気空隙Ｑが形成されたトロイダルコア１１に磁束発生用
のコイル１２を巻回し、かつ磁気空隙ｑの所定の位置に
磁束検出用のホール素子１３を設けて構成していた。(Prior art and its problems) Conventionally, as shown in FIG. 4, this type of current detector has a magnetic flux generating coil 12 wound around a toroidal core 11 in which a magnetic air gap Q is formed, and a magnetic air gap Q. A Hall element 13 for detecting magnetic flux was provided at a predetermined position of q.
しかるに、このホール素子型の電流検出器においては、
コイル１２に１を流が流れるとトロイダルコア１１に磁
束が流れるが、この場合、磁気空隙Ｑに設けられたホー
ル素子１３の面に対し垂直方向の磁界を作用せしめ、ホ
ール効果によって生ずる起電力により、コイル１２に流
れる電流を検出するものである。このため、磁気空隙ｑ
の巾は常に一定にする必要がある。However, in this Hall element type current detector,
When current 1 flows through the coil 12, magnetic flux flows through the toroidal core 11. In this case, a magnetic field is applied perpendicularly to the surface of the Hall element 13 provided in the magnetic gap Q, and the electromotive force generated by the Hall effect causes a magnetic flux to flow through the toroidal core 11. , which detects the current flowing through the coil 12. Therefore, the magnetic gap q
The width must always be constant.
しかしながら、トロイダルコア１１は一般に薄いシート
状の磁性鋼板を巻回して形成され、かつ形状が一部を切
欠いたリング状であるため、磁気空隙Ｑの巾が広がって
しまうことがあり、特性にバラツキが生ずるおそれがあ
った。また、トロイダルコア１１以外のコアについても
ホール素子型の電流検出器の動作原理から、磁気空隙は
常に一定にしておく必要がある。However, since the toroidal core 11 is generally formed by winding a thin sheet-like magnetic steel plate and has a partially cut-out ring shape, the width of the magnetic gap Q may widen, resulting in variations in characteristics. There was a risk that this would occur. Further, for cores other than the toroidal core 11, it is necessary to keep the magnetic gap constant at all times due to the operating principle of a Hall element type current detector.
（問題点を解決するための手段）
本発明は上記の点に鑑み提案されたもので、その目的と
するところは、磁気空隙の巾を常に一定にし得るコアを
備えた電流検出器を提供することにある。(Means for Solving the Problems) The present invention has been proposed in view of the above points, and its purpose is to provide a current detector equipped with a core that can always keep the width of the magnetic gap constant. There is a particular thing.
すなわら、本発明は上記目的を達成するために、昔する
にホール素子型のｆｆｉ流検比検出器いて、コアに形成
された磁気空隙に空隙固定板を設けたことを要旨として
いる。In other words, in order to achieve the above object, the present invention is based on the fact that in the past there was a Hall element type FFI current ratio detector, in which a gap fixing plate was provided in the magnetic gap formed in the core.
（ＰＩ’用）
本発明では空隙固定板を磁気空隙に設けることにより、
磁気空隙の巾を一定にしたものである。(For PI') In the present invention, by providing a gap fixing plate in the magnetic gap,
The width of the magnetic gap is kept constant.
（実施例） 以下、図面に沿って本発明を説明する。(Example) Hereinafter, the present invention will be explained along with the drawings.
第１図（イ）、（ロ）は本発明の第１実施例を示すもの
で、この実施例においてコア１はシート状のけい素鋼板
を巻回して形成したトロイダルコアから成り、かつ形成
された磁気空隙Ｑの一部に空隙固定板２が設けられてい
る。すなわら、この空隙固定板２は合成樹脂等から成り
、内側の略中央部には突部２ａが形成されている。そし
て、この空隙固定板２を磁気空隙Ｑが形成されたトロイ
ダルコア１の外周部に当てがい、かつ突部２ａを磁気空
隙ｑ内の外側部分に挿入・位置させ、トロイダルコア１
および空隙固定板２の外周に非磁性体の鋼帯３３巻回し
て締付ければ、空隙固定板２をトロイダルコア１に対し
一体的に取付けることができると共に、突部２ａにより
磁気空隙ｑの巾を一定に保持することができる。FIGS. 1(a) and 1(b) show a first embodiment of the present invention. In this embodiment, the core 1 consists of a toroidal core formed by winding a sheet-like silicon steel plate. A gap fixing plate 2 is provided in a part of the magnetic gap Q. That is, this gap fixing plate 2 is made of synthetic resin or the like, and has a protrusion 2a formed approximately at the center of the inside. Then, this gap fixing plate 2 is applied to the outer circumference of the toroidal core 1 in which the magnetic gap Q is formed, and the protrusion 2a is inserted and positioned in the outer part of the magnetic gap q.
By winding and tightening a non-magnetic steel strip 33 around the outer circumference of the gap fixing plate 2, the gap fixing plate 2 can be integrally attached to the toroidal core 1, and the width of the magnetic gap q can be fixed by the protrusion 2a. can be held constant.
しかして、周知のように、トロイダルコア１にコイルを
巻回し、かつ磁気空隙ｑにホール素子（何れも図示せず
）を配設するなどすればｍ流検出器を組立てることがで
きる。As is well known, an m-flow detector can be assembled by winding a coil around the toroidal core 1 and arranging a Hall element (none of which is shown) in the magnetic gap q.
第２図（イ１．（０１は本発明の第２実施例であり、こ
の例ではコア１Ａはけい素鋼板を積層して成り、かつ磁
気空隙Ｑが形成されたもので、かつ一対の空隙固定板２
を備えている。すなわち、各空隙固定板２は磁気空隙Ｑ
が形成されたコア１Ａの両面側にそれぞれ設けられ、各
突部２ａの端面ｓｍ気空隙Ｑ内において離間・対向し、
この間に１１−ル素子（図示せず）が配設される。また
、コア１Ａの外周に鋼帯３を巻回して締付けることによ
り、一対の空隙固定板２をコア１＾に対し一体的に取付
けた構成となっている。なお、空隙固定板２はこのよう
にコア１＾の両面側に設けることが好ましいが、何れか
一方の面側だけに設けることも可能であることは１ＩＪ
Ｊ論である。Figure 2 (A1. (01) is the second embodiment of the present invention. In this example, the core 1A is made of laminated silicon steel plates, and a magnetic gap Q is formed, and a pair of gap Fixed plate 2
It is equipped with That is, each gap fixing plate 2 has a magnetic gap Q.
are respectively provided on both sides of the core 1A in which a
A 11-element (not shown) is disposed between them. Further, by winding and tightening the steel strip 3 around the outer periphery of the core 1A, the pair of gap fixing plates 2 are integrally attached to the core 1^. Although it is preferable that the gap fixing plate 2 is provided on both sides of the core 1^ in this way, it is also possible to provide it on only one side.
This is theory J.
第３図（イ）〜（ハ）は本発明の第３実施例を示すもの
で、この実施例では、コア１Ｂは２つのコアｌｂ。FIGS. 3(A) to 3(C) show a third embodiment of the present invention. In this embodiment, the core 1B has two cores lb.
１ ｔ＋ ’が結合され、かつ磁気空隙Ｑが形成された
カットコアから成り、口のカットコアに対しその外周側
から空隙固定板２を取付けるように構成している。It consists of a cut core in which 1 t+' is coupled and a magnetic gap Q is formed, and the gap fixing plate 2 is attached to the cut core at the mouth from its outer circumferential side.
しかして、コイル４は中空状のコイルボビン５の外周に
巻回され、このコイルボビン５の中空部内に各コアＨ＋
、１ｂ’の脚部を挿入・当接させ、かつカットコアの外
周に巻付けるための鋼帯３も挿入する。そして、磁気空
隙０部分に、外周側から空隙固定板２の突部２ａを挿入
し、鋼帯３を巻付けて空隙固定板２を固定し、磁気空隙
ｑ内にホール素子（図示せず）を設けるようになってい
る。The coil 4 is wound around the outer periphery of a hollow coil bobbin 5, and each core H+
, 1b' are inserted and brought into contact with each other, and a steel strip 3 for wrapping around the outer periphery of the cut core is also inserted. Then, the protrusion 2a of the gap fixing plate 2 is inserted into the magnetic gap 0 portion from the outer circumferential side, the steel strip 3 is wrapped around it to fix the gap fixing plate 2, and a Hall element (not shown) is inserted into the magnetic gap q. is set up.
しかるに、従前の電流検出器においては、コイルは１−
ロイダルコアに対し直接巻付けているため、コイルまた
はトロイダルコアのうち何れかの絶縁が破壊された場合
、トロイダルコアとコイルとが短絡するおそれがあった
。しかしながら、口の実施例ではコイル４とコア１Ｂと
の間にコイルボビン５が介設されているため、磁気空隙
Ｑに空隙固定板２を介し一定にすることに加え、高絶縁
化をも図ることができる。However, in conventional current detectors, the coil is 1-
Since the toroidal core is directly wound around the toroidal core, if the insulation of either the coil or the toroidal core is broken, there is a risk that the toroidal core and the coil will be short-circuited. However, in the embodiment described above, since the coil bobbin 5 is interposed between the coil 4 and the core 1B, in addition to making the magnetic gap Q constant through the gap fixing plate 2, high insulation is also achieved Can be done.
なお、第１．第２実施例においてもコアに対しコイルボ
ビンを介してコイルを巻装しこの実施例のように構成し
ても良いことは勿論である。In addition, 1. It goes without saying that in the second embodiment, a coil may be wound around the core via a coil bobbin and configured as in this embodiment.
（発明の効果）
以上のように本発明によれば、磁気空隙に空隙固定板を
設けたので、磁気空隙の巾を一定にし得る効果がある。(Effects of the Invention) As described above, according to the present invention, since the gap fixing plate is provided in the magnetic gap, there is an effect that the width of the magnetic gap can be made constant.
【図面の簡単な説明】
第１図は本発明の第１実施例で、（イ）図は正面図、（
ロ）図は側面図、第２図（イ）、（ロ）は本発明の第２
実施例、第３図は本発明の第３実施例で、（イ）図は分
解斜視図、１０）、（ハ）図は組立状態を示す説明図、
第４図は従来例である。
１、ＩＡ、１ト・・・コア、２・・・・空隙固定板、２
ａ・・・・突部、３・・・・鋼帯
第１図
第４図
第３図[Brief Description of the Drawings] Figure 1 shows a first embodiment of the present invention, and Figure (A) is a front view; Figure (A) is a front view;
b) Figure is a side view, Figures 2 (a) and (b) are second views of the present invention.
Embodiment FIG. 3 shows a third embodiment of the present invention, (A) is an exploded perspective view, (10) and (C) are explanatory diagrams showing an assembled state,
FIG. 4 shows a conventional example. 1, IA, 1... Core, 2... Gap fixing plate, 2
a... Projection, 3... Steel strip Figure 1 Figure 4 Figure 3
Claims (1)
ル素子型の電流検出器において、前記磁気空隙に空隙固
定板を設け、磁気空隙の巾を一定にしたことを特徴とす
る電流検出器。1. A Hall element type current detector in which a Hall element is provided in a magnetic gap formed in a core, characterized in that a gap fixing plate is provided in the magnetic gap to make the width of the magnetic gap constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61156983A JPS6312971A (en) | 1986-07-03 | 1986-07-03 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61156983A JPS6312971A (en) | 1986-07-03 | 1986-07-03 | Current detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6312971A true JPS6312971A (en) | 1988-01-20 |
Family
ID=15639604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61156983A Pending JPS6312971A (en) | 1986-07-03 | 1986-07-03 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6312971A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63159769U (en) * | 1987-04-09 | 1988-10-19 | ||
| JPH0397671U (en) * | 1990-01-25 | 1991-10-08 | ||
| JPH04148870A (en) * | 1990-10-12 | 1992-05-21 | Murata Mfg Co Ltd | Detection coil |
| US5344295A (en) * | 1991-09-11 | 1994-09-06 | Kabushiki Kaisha Kobe Seiko Sho | Postcure tire inflator having rim clearance adjusting device |
| EP1452878A1 (en) * | 2003-02-27 | 2004-09-01 | Liaisons Electroniques-Mecaniques Lem S.A. | Electric current sensor |
| JP2005308526A (en) * | 2004-04-21 | 2005-11-04 | Denso Corp | Current sensor |
| JP2012163401A (en) * | 2011-02-04 | 2012-08-30 | Aisan Ind Co Ltd | Current sensor |
-
1986
- 1986-07-03 JP JP61156983A patent/JPS6312971A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63159769U (en) * | 1987-04-09 | 1988-10-19 | ||
| JPH0512772Y2 (en) * | 1987-04-09 | 1993-04-02 | ||
| JPH0397671U (en) * | 1990-01-25 | 1991-10-08 | ||
| JPH04148870A (en) * | 1990-10-12 | 1992-05-21 | Murata Mfg Co Ltd | Detection coil |
| US5344295A (en) * | 1991-09-11 | 1994-09-06 | Kabushiki Kaisha Kobe Seiko Sho | Postcure tire inflator having rim clearance adjusting device |
| WO2004077078A1 (en) * | 2003-02-27 | 2004-09-10 | Liaisons Electroniques-Mecaniques Lem S.A. | Electric current sensor |
| EP1452878A1 (en) * | 2003-02-27 | 2004-09-01 | Liaisons Electroniques-Mecaniques Lem S.A. | Electric current sensor |
| EP1767952A1 (en) * | 2003-02-27 | 2007-03-28 | Liaisons Electroniques-Mecaniques Lem S.A. | Electrical current sensor |
| US7492145B2 (en) | 2003-02-27 | 2009-02-17 | Liaisons Electroniques-Mecaniques Lem S.A. | Electric current sensor with a bracket attached to the core on either side of the air-gap and outside of the air gap |
| US7659709B2 (en) | 2003-02-27 | 2010-02-09 | Liaisons Electroniques-Mécaniques LEM S.A. | Electric current sensor having housing with rails to insert support board |
| JP2010091550A (en) * | 2003-02-27 | 2010-04-22 | Liaisons Electroniques Mech Lem Sa | Current sensor |
| JP2005308526A (en) * | 2004-04-21 | 2005-11-04 | Denso Corp | Current sensor |
| JP2012163401A (en) * | 2011-02-04 | 2012-08-30 | Aisan Ind Co Ltd | Current sensor |
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