JP3024442U - Current detector - Google Patents

Current detector

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Publication number
JP3024442U
JP3024442U JP1995013264U JP1326495U JP3024442U JP 3024442 U JP3024442 U JP 3024442U JP 1995013264 U JP1995013264 U JP 1995013264U JP 1326495 U JP1326495 U JP 1326495U JP 3024442 U JP3024442 U JP 3024442U
Authority
JP
Japan
Prior art keywords
circuit board
gap
current detector
sensitive element
magnetic
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 - Lifetime
Application number
JP1995013264U
Other languages
Japanese (ja)
Inventor
準二 宮本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kohshin Electric Corp
Original Assignee
Kohshin Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kohshin Electric Corp filed Critical Kohshin Electric Corp
Priority to JP1995013264U priority Critical patent/JP3024442U/en
Application granted granted Critical
Publication of JP3024442U publication Critical patent/JP3024442U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】 【目的】 小型、安価で耐ノイズ性の高い電流検出器を
得る。 【構成】 磁性体コア1の一辺を円周方向にギャップ2
を有して重なるように配置し、このギャップ2に表面実
装タイプの感磁素子が実装された回路基板4を配置し
た。
(57) [Abstract] [Purpose] To obtain a small-sized, inexpensive current detector with high noise resistance. [Structure] One side of the magnetic core 1 has a gap 2 in the circumferential direction.
And a circuit board 4 on which a surface mount type magneto-sensitive element is mounted is arranged in the gap 2.

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

この考案は、磁性体コアのギャップに感磁素子を配置し、被検出電流による磁 界を感磁素子の出力に変換して電流を検出する電流検出器に関するものである。 The present invention relates to a current detector in which a magnetic sensitive element is arranged in a gap of a magnetic core and a magnetic field due to a detected current is converted into an output of the magnetic sensitive element to detect the current.

【0002】[0002]

【従来の技術】[Prior art]

図2(a)及び図2(b)は例えば実開昭64−8668号公報に示された従 来の電流検出器の構造図で、図において、1はギャップ2を有する磁性体コアで 、ギャップ2は円周方向と直角に設けられている、3はギャップ2に配置され、 回路基板4に搭載された感磁素子、5は被検出電流を流すコイルである。6は磁 界を示す。 ここで図2(a)においては回路基板4はコアの円周方向と平行に配置されて おり、マザー基板への取り付けスペースが小さくなるように構成されている。 また、図2(b)においては回路基板4はコアの円周方向と垂直に配置されて おり、回路基板4に表面実装タイプの感磁素子を搭載することにより、実装コス トの削減を行っている。 2A and 2B are structural views of a conventional current detector disclosed in, for example, Japanese Utility Model Laid-Open No. 64-8668, in which 1 is a magnetic core having a gap 2. The gap 2 is provided at a right angle to the circumferential direction, 3 is arranged in the gap 2, and the magnetic sensing element mounted on the circuit board 4 and 5 are coils for passing a current to be detected. 6 shows a magnetic field. Here, in FIG. 2A, the circuit board 4 is arranged in parallel to the circumferential direction of the core, and is configured so that the mounting space on the mother board is reduced. Further, in FIG. 2B, the circuit board 4 is arranged perpendicularly to the circumferential direction of the core, and the mounting cost is reduced by mounting the surface mount type magnetic sensing element on the circuit board 4. ing.

【0003】[0003]

【考案が解決しようとする課題】[Problems to be solved by the device]

従来の電流検出器はこのように構成されているので、装置を小型にするために 回路基板をコアの円周方向と平行に配置しようとすると、ディスクリートタイプ の感磁素子を使用する必要があり、表面実装タイプの感磁素子を使用した場合に 比較して、実装コストが高くなるという問題点かあった。 また、感磁素子をギャップの中へ挿入するためには感磁素子のリード線が長く なり、コイル6より発生した電磁ノイズや静電ノイズの影響を受けやすく、誤動 作の原因になるという問題点があった。 また、表面実装タイプの感磁素子を使用するためには、回路基板をコアの円周 方向と垂直に配置する必要があり、装置が大きくなるという問題点があった。 Since the conventional current detector is configured in this way, it is necessary to use a discrete type magnetic sensing element when attempting to arrange the circuit board parallel to the circumferential direction of the core in order to miniaturize the device. However, there is a problem that the mounting cost is higher than that when the surface mount type magnetic sensitive element is used. Also, in order to insert the magnetic sensitive element into the gap, the lead wire of the magnetic sensitive element becomes long, which is easily affected by electromagnetic noise and electrostatic noise generated from the coil 6, which causes malfunction. There was a problem. In addition, in order to use the surface mount type magneto-sensitive element, it is necessary to dispose the circuit board perpendicular to the circumferential direction of the core, which causes a problem that the device becomes large.

【0004】 この考案は上記のような問題点を解消するためになされたもので、小型、安価 で耐ノイズ性の高い電流検出器を得ることを目的とする。The present invention was made in order to solve the above problems, and an object thereof is to obtain a small-sized, inexpensive, current detector having high noise resistance.

【0005】[0005]

【課題を解決するための手段】[Means for Solving the Problems]

この考案による電流検出器は、磁性体コアの一辺を円周方向にギャップを有し て重なるように配置し、このギャップに回路基板と回路基板に実装された表面実 装タイプの感磁素子を配置したものである。 In the current detector according to the present invention, one side of the magnetic core is arranged with a gap in the circumferential direction so as to overlap with each other, and in this gap, the circuit board and the surface mounted type magnetic sensitive element mounted on the circuit board are arranged. It is arranged.

【0006】[0006]

【作用】[Action]

このように構成された電流検出器によれば、ギャップがコアの円周方向に対し て平行に設けられるため、表面実装タイプの感磁素子を基板に搭載した状態で回 路基板をコアの円周方向と平行に配置することができ、実装コストの低減とスペ ースの有効利用による装置の小型化を同時に実現することができる。 According to the current detector thus configured, the gap is provided in parallel with the circumferential direction of the core, so that the circuit board is mounted on the circuit board with the surface mount type magnetic sensitive element mounted on the board. Since they can be arranged parallel to the circumferential direction, it is possible to reduce the mounting cost and reduce the size of the device by effectively utilizing the space.

【0007】 また、感磁素子から信号増幅回路までの配線を短くすることができるため、ノ イズの影響を受けにくくなり、ノイズによる誤動作を防止することができる。Further, since the wiring from the magnetic sensing element to the signal amplifier circuit can be shortened, it is less susceptible to noise, and malfunction due to noise can be prevented.

【0008】[0008]

【実施例】【Example】

図1はこの考案の一実施例を示す構造図である。図においてコア1の一端1a と他端1bは直線状の平面で段違いに配置されており、その先端部分がギャップ 2を隔てて重なるようになっている。 また、感磁素子3は信号処理回路(図示せず)などと共に回路基板4に表面実 装され、前記ギャップ2に配置されている。5は被検出電流を流すコイル、6は 磁界を示す。 このように構成されたものでは、表面実装タイプの感磁素子3を使用してもコ ア1の端部の直線状平面に対して回路基板4を平行に配置できるため、スペース を有効に使うことができ、装置の小型化と実装コストの削減が同時に実現できる とともに、感磁素子3から回路基板4への配線長を短くすることができるのでノ イズの影響を受けにくくなり、誤動作を防止することができる。なお、この種の 電流検出器に使用する感磁素子としてはホール素子が適当である。 FIG. 1 is a structural diagram showing an embodiment of the present invention. In the drawing, one end 1a and the other end 1b of the core 1 are arranged in a stepped manner on a linear plane, and their tip portions are overlapped with a gap 2 therebetween. The magnetic sensing element 3 is mounted on the surface of the circuit board 4 together with a signal processing circuit (not shown) and the like, and is disposed in the gap 2. Reference numeral 5 is a coil for passing a current to be detected, and 6 is a magnetic field. With this structure, the circuit board 4 can be arranged in parallel to the linear plane of the end of the core 1 even if the surface mount type magnetic sensitive element 3 is used, so that the space is effectively used. In addition to downsizing the device and reducing the mounting cost, the wiring length from the magnetic sensitive element 3 to the circuit board 4 can be shortened, which reduces the influence of noise and prevents malfunction. can do. A Hall element is suitable as a magnetic sensing element used in this type of current detector.

【考案の効果】[Effect of device]

この考案による電流検出器は、表面実装タイプの感磁素子を使用してもコアの 円周方向に対して回路基板4を平行に配置できるため、スペースを有効に使うこ とができ、装置の小型化と実装コストの削減が同時に実現できるとともに、配線 長を短くすることができるのでノイズの影響を受けにくくなり、誤動作を防止す ることができる。 In the current detector according to the present invention, the circuit board 4 can be arranged parallel to the circumferential direction of the core even if the surface mount type magnetic sensitive element is used, so that the space can be effectively used and the device Miniaturization and reduction of mounting cost can be realized at the same time, and since the wiring length can be shortened, it is less susceptible to noise and malfunctions can be prevented.

【図面の簡単な説明】[Brief description of drawings]

【図1】この考案の実施例を示す構造図である。FIG. 1 is a structural view showing an embodiment of the present invention.

【図2】従来の電流検出器を示す構造図である。FIG. 2 is a structural diagram showing a conventional current detector.

【符号の説明】[Explanation of symbols]

1 磁性体コア 2 ギャップ 3 感磁素子 4 回路基板 5 コイル 6 磁界 1 Magnetic Core 2 Gap 3 Magnetic Sensitive Element 4 Circuit Board 5 Coil 6 Magnetic Field

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ギャップを有する磁性体コアと、前記磁性体コアのギャ
ップ内に配置された感磁素子と、前記感磁素子と信号処
理回路が搭載された回路基板からなる電流検出器におい
て、上記磁性体コアの一端は上記回路基板に平行で、か
つ、上記回路基板の長さの1/2以上にわたって近接す
るように形成し、上記磁性体コアの他端は、上記回路基
板に搭載された感磁素子に対向する位置に所定のギャッ
プを介して配置したことを特徴とする電流検出器。
In a current detector comprising a magnetic core having a gap, a magnetic sensitive element arranged in the gap of the magnetic core, and a circuit board on which the magnetic sensitive element and a signal processing circuit are mounted, One end is formed so as to be parallel to the circuit board and close to the circuit board for at least ½ of the length of the circuit board, and the other end of the magnetic core is connected to the magnetic sensitive element mounted on the circuit board. A current detector, characterized in that the current detectors are arranged at opposite positions via a predetermined gap.
JP1995013264U 1995-11-08 1995-11-08 Current detector Expired - Lifetime JP3024442U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1995013264U JP3024442U (en) 1995-11-08 1995-11-08 Current detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1995013264U JP3024442U (en) 1995-11-08 1995-11-08 Current detector

Publications (1)

Publication Number Publication Date
JP3024442U true JP3024442U (en) 1996-05-21

Family

ID=43159678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1995013264U Expired - Lifetime JP3024442U (en) 1995-11-08 1995-11-08 Current detector

Country Status (1)

Country Link
JP (1) JP3024442U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011081197A1 (en) * 2009-12-28 2011-07-07 Tdk株式会社 Magnetic field detecting apparatus and current sensor
JP2021081450A (en) * 2017-05-08 2021-05-27 ティディケイ−ミクロナス ゲー・エム・ベー・ハー Magnetic field compensation device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011081197A1 (en) * 2009-12-28 2011-07-07 Tdk株式会社 Magnetic field detecting apparatus and current sensor
CN102713654A (en) * 2009-12-28 2012-10-03 Tdk株式会社 Magnetic field detecting apparatus and current sensor
JP5657570B2 (en) * 2009-12-28 2015-01-21 Tdk株式会社 Magnetic field detector
US9086444B2 (en) 2009-12-28 2015-07-21 Tdk Corporation Magnetic field detection device and current sensor
CN102713654B (en) * 2009-12-28 2016-08-17 Tdk株式会社 Detector for magnetic field and current sensor
JP2021081450A (en) * 2017-05-08 2021-05-27 ティディケイ−ミクロナス ゲー・エム・ベー・ハー Magnetic field compensation device

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