JP3329947B2 - Current detector - Google Patents
Current detectorInfo
- Publication number
- JP3329947B2 JP3329947B2 JP16995994A JP16995994A JP3329947B2 JP 3329947 B2 JP3329947 B2 JP 3329947B2 JP 16995994 A JP16995994 A JP 16995994A JP 16995994 A JP16995994 A JP 16995994A JP 3329947 B2 JP3329947 B2 JP 3329947B2
- Authority
- JP
- Japan
- Prior art keywords
- bus bar
- current detector
- bobbin case
- circuit board
- mounting
- 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]
【産業上の利用分野】本発明は、電子機器、又は電気機
械等に使用される、磁気回路の一部に、磁気ギャップを
設けた強磁性体コアと、磁気ギャップ内に置かれたホー
ル素子等からなる感磁素子を用い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 relates to a ferromagnetic core provided with a magnetic gap in a part of a magnetic circuit used in an electronic device or an electric machine, and a Hall element placed in the magnetic gap. The present invention relates to a current detector using a magneto-sensitive element made of the same.
【０００２】[0002]
【従来の技術】従来のこの種の電流検出器は、図３に示
すように、回周状磁気回路の一部として磁気ギャップを
設けた強磁性体コア９をコアケース１０に収納し、前記
磁気ギャップに配置される感磁素子１３と回路部品を実
装した実装回路基板１４を、絶縁樹脂からなる外装ケー
ス１２に収納し、前記コアケース１０に巻線を巻き回し
コイル１１を形成し、コイル１１に流れる検出電流を磁
気ギャップに配置した感磁素子１３により検出する構成
となっており、コイル端末及び信号入出力端子は、取り
付け基板にディップ挿入される構造となっている。2. Description of the Related Art As shown in FIG. 3, a conventional current detector of this type houses a ferromagnetic core 9 provided with a magnetic gap as a part of a circulating magnetic circuit in a core case 10; A mounting circuit board 14 on which a magnetic sensing element 13 and a circuit component mounted on a magnetic gap are mounted is housed in an outer case 12 made of an insulating resin, and a winding is wound around the core case 10 to form a coil 11. The structure is such that the detection current flowing through the sensor 11 is detected by the magneto-sensitive element 13 arranged in the magnetic gap, and the coil terminal and the signal input / output terminal are dip-inserted into the mounting board.
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような従
来の電流検出器は、外装ケースを有するための実装面積
が大きく、水洗浄を行う場合、外装ケース内に水が残留
し、回路基板に配置された感磁素子等の腐食の原因とな
る。又、強磁性体コアへの巻線が必要であるため、工程
が長くなる等の問題があった。However, such a conventional current detector has a large mounting area due to having an outer case, and when performing water washing, water remains in the outer case, and the water is left on the circuit board. This may cause corrosion of the arranged magnetic sensing element and the like. In addition, since a winding around the ferromagnetic core is required, there is a problem that the process is lengthened.
【０００４】本発明の目的は、実装面積が小さい、作業
性のよい、品質、及び精度のよい電流検出器を提供する
ことにある。An object of the present invention is to provide a current detector with a small mounting area, good workability, high quality and high accuracy.
【０００５】[0005]
【課題を解決するための手段】本発明は、一部に磁気ギ
ャップを設けた略コの字状の強磁性体コアと、略中央に
感磁素子と一端部の片側に信号入出力端子を有する回路
基板と、前記強磁性体コアを貫通するＵ字状のバスバー
と、前記強磁性体コアと前記バスバーを取り付ける絶縁
樹脂からなるボビンケースと、前記強磁性体コアと前記
感磁素子との間を絶縁する絶縁シートとからなり、前記
ボビンケースに取付ピンと、前記回路基板に前記取付ピ
ンを取り付ける取付穴とを設け、前記回路基板に前記ボ
ビンケースを固定し、前記ボビンケースに前記バスバー
を、前記信号入出力端子と平行で、かつ、先端が前記一
端部の他方の片側に突出し、前記信号入出力端子の先端
と同一面上に位置するように取り付けるとともに、前記
ボビンケースに前記磁性体コアを、前記磁気ギャップ内
に前記感磁素子が位置するように取り付けたことを特徴
とする電流検出器である。According to the present invention, a substantially U-shaped ferromagnetic core partially provided with a magnetic gap, a magneto-sensitive element substantially at the center, and a signal input / output terminal on one side of one end are provided. A U-shaped bus bar penetrating the ferromagnetic core, a bobbin case made of an insulating resin for attaching the ferromagnetic core and the bus bar, and a circuit board having the ferromagnetic core and the magneto-sensitive element. The bobbin case is provided with mounting pins and mounting holes for mounting the mounting pins on the circuit board, the bobbin case is fixed to the circuit board, and the bus bar is mounted on the bobbin case. The signal input / output terminal is parallel to the signal input / output terminal, and the tip protrudes to the other side of the one end, and is mounted so as to be located on the same plane as the tip of the signal input / output terminal. The magnetic core, a current detector, wherein the sensing element within the magnetic gap is mounted so as to be located.
【０００６】本発明は、上記記載の電流検出器におい
て、前記ボビンケースに前記強磁性体コアを挿入する貫
通孔と直交する方向に、前記バスバーの挿入する貫通孔
が設けられたことを特徴とする電流検出器である。According to the present invention, in the above-described current detector, a through hole into which the bus bar is inserted is provided in the bobbin case in a direction orthogonal to a through hole into which the ferromagnetic core is inserted. Current detector.
【０００７】[0007]
【作用】本発明の電流検出器は、図１に示すように、信
号入出力端子８と、絶縁シート５に覆われた感磁素子６
と、ボビンケース２の取付ピン２ａ，２ｂを取り付ける
取付穴２ｄ，２ｅとを有する回路基板４、強磁性体コア
１、ボビンケース２、及びバスバー３から構成されて、
複数の信号入出力端子８とバスバーの端末が回路基板の
幅方向に平行するように設けられている。このために、
コアを巻線するコイルが不要となり、又、組合せが簡単
になり、実装面積が小さくなる。又、作業性がよくな
り、工程も短縮する。又、電気的精度もよくなる。As shown in FIG. 1, the current detector according to the present invention comprises a signal input / output terminal 8 and a magnetic sensing element 6 covered with an insulating sheet 5.
And a circuit board 4 having mounting holes 2d and 2e for mounting the mounting pins 2a and 2b of the bobbin case 2, a ferromagnetic core 1, the bobbin case 2, and a bus bar 3.
A plurality of signal input / output terminals 8 and terminals of the bus bar are provided so as to be parallel to the width direction of the circuit board. For this,
No coil for winding the core is required, and the combination is simplified, and the mounting area is reduced. In addition, workability is improved and the process is shortened. Also, the electrical accuracy is improved.
【０００８】[0008]
【実施例】本発明の実施例について、図面を参照して説
明する。Embodiments of the present invention will be described with reference to the drawings.
【０００９】本発明の電流検出器は、次のようにして組
み立てられる。図１に示すように、取付ピン２ａ，２ｂ
を有するボビンケース２を、感磁素子６を実装した回路
基板４に組み込み、前記取付ピン２ａ，２ｂを半田付け
し、前記ボビンケース２のバスバー用貫通孔１５に、Ｕ
字に折り曲げられた電気良導体の金属板からなるバスバ
ー３を矢印１５ａの方向から挿入する。The current detector of the present invention is assembled as follows. As shown in FIG. 1, the mounting pins 2a, 2b
Is mounted on the circuit board 4 on which the magneto-sensitive element 6 is mounted, the mounting pins 2a and 2b are soldered, and the U is inserted into the bus bar through hole 15 of the bobbin case 2.
A bus bar 3 made of a metal plate of an electric conductor bent into a letter is inserted from the direction of arrow 15a.
【００１０】前記回路基板４に実装された感磁素子６を
覆うように、絶縁シート５を前記回路基板４に接着す
る。強磁性体コア１を前記バスバー３と直交する矢印１
５ｄの方向で前記ボビンケース２に挿入し、前記感磁素
子６が磁気ギャップ７の中心に位置するように配置す
る。An insulating sheet 5 is adhered to the circuit board 4 so as to cover the magneto-sensitive element 6 mounted on the circuit board 4. Arrow 1 perpendicular to ferromagnetic core 1 and bus bar 3
It is inserted into the bobbin case 2 in the direction of 5d, and is arranged so that the magneto-sensitive element 6 is located at the center of the magnetic gap 7.
【００１１】次に、本発明の電流検出器の機能について
説明する。図２において、Ｕ字状に折り曲げられた電気
良導体の金属板からなる平板状のバスバー３の端末３
ａ，３ｂを被検出電流が流れるように、外部導体に接続
する。バスバーの端末３ａ，３ｂに被検出電流が流れる
と、磁気ギャップ７内に被検出電流に応じた磁界が発生
し、その磁界は感磁素子６により電気信号に変換され、
回路基板４上の回路により信号処理され、信号入出力端
子８を通して出力される。なお、信号入出力端子８に
は、電源用の入出力端子も含まれている。。Next, the function of the current detector of the present invention will be described. In FIG. 2, a terminal 3 of a flat bus bar 3 made of a metal plate of an electric conductor bent in a U-shape.
a and 3b are connected to an external conductor so that a current to be detected flows. When a detected current flows through the terminals 3a and 3b of the bus bar, a magnetic field corresponding to the detected current is generated in the magnetic gap 7, and the magnetic field is converted by the magneto-sensitive element 6 into an electric signal.
The signal is processed by a circuit on the circuit board 4 and output through a signal input / output terminal 8. The signal input / output terminal 8 includes a power input / output terminal. .
【００１２】即ち、本発明の電流検出器は、巻線を必要
としない電流検出器である。又、回路基板４とバスバー
３とがボビンケース２により、直接、接していないの
で、前記バスバー３に大電流が流れた場合に発生するジ
ュール熱が、前記回路基板４に伝わるのを押さえること
が可能な電流検出器である。That is, the current detector of the present invention is a current detector that does not require a winding. Further, since the circuit board 4 and the bus bar 3 are not directly in contact with each other by the bobbin case 2, it is possible to suppress transmission of Joule heat generated when a large current flows through the bus bar 3 to the circuit board 4. A possible current detector.
【００１３】又、本発明の直流電流検出器は、信号入出
力端子８の半田接合面と、回周状磁気回路の内外周を把
持しているバスバーの端末３ａ，３ｂの半田接合面とを
同一面上にすることができ、回路基板の取り付けにおい
ては、端子を装着する差し込み穴を設けることが不要と
なり、位置の制限がなくなり、取り付けが容易となる。
従って、作業性がよくなる。In the DC current detector of the present invention, the solder joint surface of the signal input / output terminal 8 and the solder joint surface of the terminals 3a and 3b of the bus bar gripping the inner and outer circumferences of the circular magnetic circuit. It can be on the same surface, and when mounting the circuit board, it is not necessary to provide an insertion hole for mounting a terminal, and there is no restriction on the position, which facilitates mounting.
Therefore, workability is improved.
【００１４】[0014]
【発明の効果】以上、述べたように、本発明によれば、
信号入出力端子とバスバーの端末との半田接合面が同一
面上となり、回路基板、強磁性体コア、バスバー、ボビ
ンケースを要求に応じて小型化できるので、実装面積を
小さくできる。又、洗浄の水がこもる所がないので、感
磁素子の腐食もなく、巻線が不要で、部品の取り付けが
簡単で、作業性がよくなる。又、コイルを巻くコアがＣ
型をしている従来品に比較して、被測定電流−出力電圧
特性の直線性がよくなり、精度がよい電流検出器の提供
が可能となる。As described above, according to the present invention,
The solder joint surface between the signal input / output terminal and the terminal of the bus bar is on the same plane, and the circuit board, the ferromagnetic core, the bus bar, and the bobbin case can be miniaturized as required, so that the mounting area can be reduced. Further, since there is no place where the washing water is trapped, there is no corrosion of the magneto-sensitive element, no winding is required, the parts can be easily mounted, and the workability is improved. The core around which the coil is wound is C
The linearity of the measured current-output voltage characteristic is improved as compared with a conventional product having a mold, and it is possible to provide an accurate current detector.
【図１】本発明による電流検出器の構成を示す分解斜視
図。FIG. 1 is an exploded perspective view showing a configuration of a current detector according to the present invention.
【図２】本発明による電流検出器の外観斜視図。FIG. 2 is an external perspective view of a current detector according to the present invention.
【図３】従来の電流検出器の側面図。FIG. 3 is a side view of a conventional current detector.
１，９ 強磁性体コア ２ ボビンケース ２ａ，２ｂ 取付ピン ２ｃ 貫通孔 ２ｄ，２ｅ 取付穴 ３ バスバー ３ａ，３ｂ （バスバーの）端末 ４，１４ 回路基板 ５ 絶縁シート ６，１３ 感磁素子 ７ 磁気ギャップ ８ 信号入出力端子 １０ コアケース １１ コイル（巻線） １２ 外装ケース １５ バスバー用貫通孔 １５ａ，１５ｂ，１５ｃ，１５ｄ 矢印 1, 9 Ferromagnetic core 2 Bobbin case 2a, 2b Mounting pin 2c Through hole 2d, 2e Mounting hole 3 Bus bar 3a, 3b Terminal (of bus bar) 4, 14 Circuit board 5 Insulating sheet 6, 13 Magnetic sensing element 7 Magnetic gap Reference Signs List 8 signal input / output terminal 10 core case 11 coil (winding) 12 exterior case 15 busbar through-holes 15a, 15b, 15c, 15d arrows
Claims (2)
の強磁性体コアと、略中央に感磁素子と一端部の片側に
信号入出力端子を有する回路基板と、前記強磁性体コア
を貫通するＵ字状のバスバーと、前記強磁性体コアと前
記バスバーを取り付ける絶縁樹脂からなるボビンケース
と、前記強磁性体コアと前記感磁素子との間を絶縁する
絶縁シートとからなり、前記ボビンケースに取付ピン
と、前記回路基板に前記取付ピンを取り付ける取付穴と
を設け、前記回路基板に前記ボビンケースを固定し、前
記ボビンケースに前記バスバーを、前記信号入出力端子
と平行で、かつ、先端が前記一端部の他方の片側に突出
し、前記信号入出力端子の先端と同一面上に位置するよ
うに取り付けるとともに、前記ボビンケースに前記磁性
体コアを、前記磁気ギャップ内に前記感磁素子が位置す
るように取り付けたことを特徴とする電流検出器。A substantially U-shaped ferromagnetic core partially provided with a magnetic gap; a circuit board having a magneto-sensitive element in a substantially center and a signal input / output terminal on one side of one end; A U-shaped bus bar penetrating through the body core, a bobbin case made of insulating resin for attaching the ferromagnetic core and the bus bar, and an insulating sheet insulating between the ferromagnetic core and the magneto-sensitive element. The bobbin case is provided with mounting pins and mounting holes for mounting the mounting pins on the circuit board, the bobbin case is fixed to the circuit board, and the bus bar is parallel to the signal input / output terminals on the bobbin case. And the tip is protruded to the other side of the one end, and is mounted so as to be located on the same plane as the tip of the signal input / output terminal. A current detector, wherein the magnetic sensing element is mounted so as to be positioned in a gap.
記ボビンケースに前記強磁性体コアを挿入する貫通孔と
直交する方向に、前記バスバーの挿入する貫通孔が設け
られたことを特徴とする電流検出器。2. The current detector according to claim 1, wherein a through hole into which the bus bar is inserted is provided in the bobbin case in a direction orthogonal to a through hole into which the ferromagnetic core is inserted. Current detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16995994A JP3329947B2 (en) | 1994-06-28 | 1994-06-28 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16995994A JP3329947B2 (en) | 1994-06-28 | 1994-06-28 | Current detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0815330A JPH0815330A (en) | 1996-01-19 |
| JP3329947B2 true JP3329947B2 (en) | 2002-09-30 |
Family
ID=15896009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16995994A Expired - Fee Related JP3329947B2 (en) | 1994-06-28 | 1994-06-28 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3329947B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10267965A (en) * | 1997-03-24 | 1998-10-09 | Nana Electron Kk | Current sensor |
| DE59712967D1 (en) * | 1997-05-21 | 2008-10-30 | Landis & Gyr Ag | Arrangement for obtaining a proportional to an electric current magnetic induction at the location of a magnetic field sensor |
| DE10022316A1 (en) * | 2000-05-09 | 2001-11-22 | Siemens Metering Ag Zug | Magnetic circuit arrangement for determining electric current, has air gap length corresponding to thickness of magnetic field sensor joined to printed circuit |
| US6781359B2 (en) | 2002-09-20 | 2004-08-24 | Allegro Microsystems, Inc. | Integrated current sensor |
| JP4833111B2 (en) | 2006-09-20 | 2011-12-07 | 株式会社東海理化電機製作所 | Current detector |
| JP2013148512A (en) * | 2012-01-20 | 2013-08-01 | Aisin Seiki Co Ltd | Current sensor |
| CN106653339B (en) * | 2016-11-29 | 2019-08-02 | 杭州海兴电力科技股份有限公司 | Current transformer |
-
1994
- 1994-06-28 JP JP16995994A patent/JP3329947B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0815330A (en) | 1996-01-19 |
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