JPH09211034A - Current detecting apparatus - Google Patents
Current detecting apparatusInfo
- Publication number
- JPH09211034A JPH09211034A JP8052220A JP5222096A JPH09211034A JP H09211034 A JPH09211034 A JP H09211034A JP 8052220 A JP8052220 A JP 8052220A JP 5222096 A JP5222096 A JP 5222096A JP H09211034 A JPH09211034 A JP H09211034A
- Authority
- JP
- Japan
- Prior art keywords
- opening
- magnetic
- plate
- conductive plate
- magnetic plates
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 9
- 230000004907 flux Effects 0.000 abstract description 9
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 239000004020 conductor Substances 0.000 abstract description 3
- 238000009966 trimming Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ホール素子や磁気
抵抗素子等による電気変化検出装置、特に電流検出を行
うことができる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 electric change detecting device using a Hall element, a magnetoresistive element or the like, and more particularly to a current detecting device capable of detecting a current.
【０００２】[0002]
【従来の技術】従来の電流検出装置は、図５に示すよう
に、略コの字形のケイ素鋼体１と、ケイ素鋼体１に巻装
されたコイル２と、ケイ素鋼体１のギャップ４に設けら
れた磁電変換素子であるホール素子を内蔵したホールＩ
Ｃ３とからなっている。コイル２は、例えば自動車電装
部品であるパワーステアリング、パワーウインドウなど
に使用されるモータやランプ、バッテリなどに接続され
る。コイル２に電流が流れると、その電流の大きさに応
じて、ケイ素鋼体１中に磁束が発生しギャップ４にも磁
束が発生する。これをホールＩＣ３が検出し、磁束に応
じた出力を発生する。磁束は電流に比例するので、電流
の大きさを検知することができる。2. Description of the Related Art As shown in FIG. 5, a conventional current detecting device has a substantially U-shaped silicon steel body 1, a coil 2 wound around the silicon steel body 1, and a gap 4 between the silicon steel bodies 1. Hall I with built-in Hall element which is a magnetoelectric conversion element
It consists of C3. The coil 2 is connected to, for example, a power steering, which is an electric component of an automobile, a motor and a lamp used for a power window, a battery, and the like. When a current flows through the coil 2, a magnetic flux is generated in the silicon steel body 1 and a magnetic flux is also generated in the gap 4 depending on the magnitude of the current. The Hall IC 3 detects this and generates an output according to the magnetic flux. Since the magnetic flux is proportional to the current, the magnitude of the current can be detected.
【０００３】[0003]
【発明が解決しようとする課題】ところで、図５に示す
従来の電流検出装置では、コイル２とケイ素鋼体１を使
用し、コイル２をケイ素鋼体１に巻装する構造のため、
電流検出装置自体が大形となる欠点がある。また、検出
装置ごとに感度のバラツキがあり、これを是正するた
め、コイルの巻数、ギャップ４の大きさ、ホールＩＣ３
の位置等を変えて調整を行うが、調整が困難であり、十
分な精度も得られなかった。By the way, in the conventional current detecting device shown in FIG. 5, since the coil 2 and the silicon steel body 1 are used and the coil 2 is wound around the silicon steel body 1,
There is a drawback that the current detection device itself is large. Further, there are variations in sensitivity among the detection devices, and in order to correct the variations, the number of turns of the coil, the size of the gap 4, the Hall IC 3
Although the position is changed and the like is adjusted, the adjustment is difficult and sufficient accuracy cannot be obtained.
【０００４】そこで、本発明は、小形でかつ感度の調整
が簡単である電流検出装置を提供することを目的とす
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a current detecting device which is small in size and whose sensitivity can be easily adjusted.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明は、側辺部に開放した開口部を有する電導板
と、前記電導板の両面に、前記開口部の少なくとも一部
を覆うように対向配置された磁性板と、前記電導板の前
記開口部において、前記磁性板間に配置された磁電変換
素子とからなる電流検出装置に係わるものである。な
お、請求項２に示すように磁性板はケイ素鋼板とするこ
とができる。また、請求項３に示すように磁電変換素子
はホールＩＣとすることができる。また、請求項４に示
すように磁性板はトリミングしたものとすることができ
る。各請求項の発明によれば、電導体、磁性体が共に板
状に形成されているので、装置が小形となる。さらに、
その磁性板をトリミングすることにより、感度の調整が
精度よく、かつ容易にできる。SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a conductive plate having an opening at its side, and both sides of the conductive plate to cover at least a part of the opening. As described above, the present invention relates to a current detecting device including a magnetic plate and a magnetoelectric conversion element arranged between the magnetic plates in the opening of the conductive plate. The magnetic plate may be a silicon steel plate. Further, as described in claim 3, the magnetoelectric conversion element can be a Hall IC. Further, as described in claim 4, the magnetic plate may be trimmed. According to the inventions of the respective claims, since the electric conductor and the magnetic body are both formed in a plate shape, the device becomes small. further,
By trimming the magnetic plate, the sensitivity can be adjusted accurately and easily.
【０００６】[0006]
【発明の実施の形態】以下、本発明による電流検出装置
の一実施形態を図１、図２に基づいて説明する。ただ
し、図１では図５に示す箇所と実質的に同一の部分に同
一の符号を付し、その説明を省略する。本実施形態の電
流検出装置は、図１、図２に示すように、開口部７を有
するコの字状の銅板５と、２枚のケイ素鋼板６と、ホー
ルＩＣ３とからなっている。ケイ素鋼板６は、銅板の両
面に開口部７の一部を覆うようにエポキシ系の接着剤で
接着される。ホールＩＣ３は開口部７において、ケイ素
鋼板間にできる間隙に挿入され、熱歪を防止するためシ
リコン系の接着剤で接着される。Ａ、Ｂは外部への電気
的接続端子であり、自動車に使用されるモータやラン
プ、バッテリ等に接続される。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a current detecting device according to the present invention will be described below with reference to FIGS. However, in FIG. 1, the substantially same parts as those shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. As shown in FIGS. 1 and 2, the current detection device of this embodiment includes a U-shaped copper plate 5 having an opening 7, two silicon steel plates 6, and a Hall IC 3. The silicon steel plate 6 is adhered to both surfaces of the copper plate with an epoxy adhesive so as to cover a part of the opening 7. The Hall IC 3 is inserted into the gap formed between the silicon steel plates at the opening 7, and is bonded with a silicon-based adhesive in order to prevent thermal strain. A and B are electrical connection terminals to the outside, which are connected to motors, lamps, batteries and the like used in automobiles.
【０００７】次に、この電流検出装置の動作を説明す
る。銅板５のＡ、Ｂ間に電流が流れると、２枚のケイ素
鋼板中に磁束が発生し、開口部７のケイ素鋼板間におい
ても同様に磁束が発生する。すなわち、開口部７におい
て、紙面の表面から裏面、又は裏面から表面へ向かうよ
うに磁束が発生する。これをホールＩＣ３中に内蔵され
ているホール素子が検出し、信号処理後、ホールＩＣ３
の出力端子ｂから検出信号が出力される。ホールＩＣ３
の端子ａ、ｃは電源端子である。感度の調整は、ケイ素
鋼板６をトリミングすることによって行われ、８はトリ
ミングにより取り除かれた部分である。Next, the operation of this current detecting device will be described. When a current flows between A and B of the copper plate 5, magnetic flux is generated in the two silicon steel plates, and magnetic flux is similarly generated between the silicon steel plates in the opening 7. That is, in the opening 7, magnetic flux is generated from the front side of the paper surface to the back side or from the back side to the front side. This is detected by the Hall element incorporated in the Hall IC3, and after signal processing, the Hall IC3
A detection signal is output from the output terminal b of. Hall IC3
The terminals a and c are power terminals. The sensitivity is adjusted by trimming the silicon steel plate 6, and 8 is a portion removed by trimming.
【０００８】本実施形態では、コイルを使用せず、銅板
やケイ素鋼板を使用し、電流検出装置を構成しているの
で、小形にできる。また、ケイ素鋼板をトリミングする
ことによって感度を調整しているので調整が容易であ
り、高精度のものが得られる。In this embodiment, the coil is not used and a copper plate or a silicon steel plate is used to form the current detecting device, so that the size can be reduced. In addition, since the sensitivity is adjusted by trimming the silicon steel plate, the adjustment is easy and a highly accurate product can be obtained.
【０００９】本発明の実施態様は上記の実施形態に限定
されず、種々の変更が可能である。例えば、電導板とし
ての銅板５の開口部７の形状は図３に示すように凸形で
もよい。凸形であれば、正確な位置決めが可能である。
銅板５、開口部７の形状は種々の形をとり得る。また、
磁性板はケイ素鋼板に限らずパーマロイ、その他の磁性
材料とすることができる。また、磁性板６は図４のよう
に２枚の磁性板を一体としたものでもよい。また、磁電
変換素子はホール素子またはホール素子を使用したもの
に限らず、磁気抵抗素子または磁気抵抗素子を使用した
ものでもよい。また、トリミングは一方の側の磁性板の
みでもよい。なお、トリミング方法としてはレーザトリ
ミング、ブラストトリミングなどが使用できる。The embodiment of the present invention is not limited to the above embodiment, and various modifications can be made. For example, the shape of the opening 7 of the copper plate 5 as the conductive plate may be convex as shown in FIG. If it is convex, accurate positioning is possible.
The copper plate 5 and the opening 7 may have various shapes. Also,
The magnetic plate is not limited to a silicon steel plate, but may be Permalloy or another magnetic material. Further, the magnetic plate 6 may be a combination of two magnetic plates as shown in FIG. Further, the magnetoelectric conversion element is not limited to the hall element or the hall element, but may be a magnetoresistive element or a magnetoresistive element. Further, the trimming may be performed only on the magnetic plate on one side. Laser trimming and blast trimming can be used as the trimming method.
【００１０】[0010]
【発明の効果】本発明によれば、電導体、磁性体を共に
板状とし、積層構造としたので、極めて小形にすること
ができる。また、磁性板をトリミングすることによっ
て、磁電変換素子に鎖交する磁束の量を変えることがで
き、磁電変換素子の感度を容易にかつ精度よく調整する
ことができる。According to the present invention, the electric conductor and the magnetic body are both plate-shaped and have a laminated structure, so that the size can be made extremely small. Further, by trimming the magnetic plate, the amount of magnetic flux interlinking with the magnetoelectric conversion element can be changed, and the sensitivity of the magnetoelectric conversion element can be adjusted easily and accurately.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施形態を示す電流検出装置で、
（ａ）は正面図、（ｂ）はその側面図である。FIG. 1 is a current detection device showing an embodiment of the present invention,
(A) is a front view and (b) is a side view thereof.
【図２】構成部品の形状を示す図で、（ａ）は電導板、
（ｂ）は磁性板である。FIG. 2 is a diagram showing the shapes of components, in which (a) is a conductive plate
(B) is a magnetic plate.
【図３】電導板の変更実施形態を示す図である。FIG. 3 is a view showing a modified embodiment of a conductive plate.
【図４】磁性板の変更実施形態を示す図である。FIG. 4 is a diagram showing a modified embodiment of a magnetic plate.
【図５】従来の電流検出装置を示す図である。FIG. 5 is a diagram showing a conventional current detection device.
３ 磁電変換素子 ５ 電導板 ６ 磁性板 3 Magnetoelectric conversion element 5 Conductive plate 6 Magnetic plate
Claims (4)
と、 前記電導板の両面に、前記開口部の少なくとも一部を覆
うように対向配置された磁性板と、 前記電導板の前記開口部において、前記磁性板間に配置
された磁電変換素子とからなることを特徴とする電流検
出装置。1. A conductive plate having an opening opening at a side portion, a magnetic plate disposed on both surfaces of the conductive plate so as to face each other so as to cover at least a part of the opening, and the conductive plate has the above-mentioned structure. A current detecting device comprising a magnetoelectric conversion element arranged between the magnetic plates in the opening.
記載の電流検出装置。2. The magnetic plate is a silicon steel plate.
The current detection device described.
求項１、２記載の電流検出装置。3. The current detection device according to claim 1, wherein the magnetoelectric conversion element is a Hall IC.
位置においてトリミングされたものである請求項１、
２、３記載の電流検出装置。4. The magnetic plate is trimmed at the position of the opening of the conductive plate.
The current detection device described in a few items.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05222096A JP3543309B2 (en) | 1996-02-02 | 1996-02-02 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05222096A JP3543309B2 (en) | 1996-02-02 | 1996-02-02 | Current detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09211034A true JPH09211034A (en) | 1997-08-15 |
| JP3543309B2 JP3543309B2 (en) | 2004-07-14 |
Family
ID=12908675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05222096A Expired - Fee Related JP3543309B2 (en) | 1996-02-02 | 1996-02-02 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3543309B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339109A (en) * | 2000-05-26 | 2001-12-07 | Sanken Electric Co Ltd | Current detection device equipped with a ball element |
| JP2006500561A (en) * | 2002-09-20 | 2006-01-05 | アレグロ・マイクロシステムズ・インコーポレーテッド | Integrated current sensor |
-
1996
- 1996-02-02 JP JP05222096A patent/JP3543309B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339109A (en) * | 2000-05-26 | 2001-12-07 | Sanken Electric Co Ltd | Current detection device equipped with a ball element |
| JP2006500561A (en) * | 2002-09-20 | 2006-01-05 | アレグロ・マイクロシステムズ・インコーポレーテッド | Integrated current sensor |
| JP2010014729A (en) * | 2002-09-20 | 2010-01-21 | Allegro Microsyst Inc | Integrated current sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3543309B2 (en) | 2004-07-14 |
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