JPH0742143Y2 - Single power supply circuit method of magnetic balance type Hall element type current sensor - Google Patents
Single power supply circuit method of magnetic balance type Hall element type current sensorInfo
- Publication number
- JPH0742143Y2 JPH0742143Y2 JP6628290U JP6628290U JPH0742143Y2 JP H0742143 Y2 JPH0742143 Y2 JP H0742143Y2 JP 6628290 U JP6628290 U JP 6628290U JP 6628290 U JP6628290 U JP 6628290U JP H0742143 Y2 JPH0742143 Y2 JP H0742143Y2
- Authority
- JP
- Japan
- Prior art keywords
- current
- hall element
- magnetic
- current sensor
- winding
- 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
Links
Landscapes
- Measuring Magnetic Variables (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
【考案の詳細な説明】 （イ）産業上の利用分野 本考案は、磁気平衡式ホール素子型電流センサの単電源
回路方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a single power supply circuit system of a magnetic balance type Hall element type current sensor.
（ロ）従来の技術 インバータ等の高速スイッチングに伴い、電流・電圧波
形が複雑化し、その計測方法として、シャント抵抗法や
CT方式に代わり、DCから高周波ACまで非接触で測定可能
な磁気平衡式ホール素子型電流センサ方式が採用されて
いる。(B) Conventional technology Current and voltage waveforms have become complicated due to high-speed switching of inverters, etc., and shunt resistance method and
Instead of the CT method, a magnetic balance Hall element type current sensor method that can measure from DC to high frequency AC without contact is adopted.
この動作原理を第２図により説明する。The operating principle will be described with reference to FIG.
まずホール素子１の出力電圧を高倍率増幅する増巾器２
を備え、二次電流I2をコイル３に流し、計測電流I1によ
る磁束とは逆方向の磁束を加えているため、コイル３及
びホール素子１は常にゼロ磁界の磁気平衡状態にある。First, the amplifier 2 that amplifies the output voltage of the Hall element 1 at a high magnification
Since the secondary current I 2 is supplied to the coil 3 and the magnetic flux in the direction opposite to the magnetic flux generated by the measurement current I 1 is applied, the coil 3 and the Hall element 1 are always in a magnetic equilibrium state of zero magnetic field.
この時、等アンペアターンの方式が成り立っている。At this time, the method of equal ampere-turn is established.
I1×N1＝I2×N2 ……（１） 但し、N1、N2はコイルのターン数である。I 1 × N 1 = I 2 × N 2 (1) However, N 1 and N 2 are the number of turns of the coil.
ここで、二次電流のサンプル抵抗をR2とすれば、その両
端の電圧Ｅは、Ｅ＝I2×R2となる。Here, if the sample resistance of the secondary current is R 2 , then the voltage E across it is E = I 2 × R 2 .
上記（１）式より、 となり、出力電圧Ｅは、計測電流I1に比例した出力が得
られる。From the above formula (1), Therefore, the output voltage E is an output proportional to the measured current I 1 .
この電流検出方式の特徴としては、次の点を挙げること
ができる。The characteristics of this current detection method are as follows.
磁心内の磁束がゼロに保たれているため、磁束の誘
導による周波数特性の劣化が防止され、DCから高周波AC
までフラットな特性が得られる。Since the magnetic flux in the magnetic core is kept at zero, deterioration of frequency characteristics due to induction of magnetic flux is prevented, and DC to high frequency AC
Flat characteristics can be obtained.
ホール素子と磁心の特性変化の影響を受けないた
め、安定性に優れ、また感度の温度変化は出力に影響を
与えない。Since it is not affected by changes in the characteristics of the Hall element and the magnetic core, it has excellent stability, and changes in sensitivity with temperature do not affect the output.
（ハ）考案が解決しようとする課題 DCからACまで測定するには、第２図に示されるように電
流I1とI2の値が常に逆向きになるよう増巾器２は制御す
るから、前記増巾器２にはプラスとマイナスの２電源が
必要となる。(C) Problems to be solved by the device To measure from DC to AC, the amplifier 2 is controlled so that the values of the currents I 1 and I 2 are always opposite as shown in FIG. The amplifier 2 requires two power sources, positive and negative.
従って、単電源の構成を持つ回路では、磁気平衡式ホー
ル素子型電流センサを用いた場合、新たな電源が必要と
なる。Therefore, in a circuit having a single power supply configuration, a new power supply is required when the magnetic balance type Hall element type current sensor is used.
（ニ）課題を解決するための手段 本考案は、二次コイルに二つの巻き線Ａ、Ｂを有し、該
巻き線Ａ、Ｂの発する磁界の向きが互いに逆となるよう
にそれぞれを巻回し、計測電流により発生する磁界を打
ち消す磁界を発生させる電流値に、所定の直流バイアス
電流を加えた電流を前記巻き線Ａに流し、前記巻き線Ｂ
に巻き線Ａの前記直流バイアス電流と同じアンペアター
ンの電流を流すことで、前記二次コイルの磁心内の磁束
をゼロに保つようにしたものである。(D) Means for Solving the Problem The present invention has a secondary coil having two windings A and B, and windings are respectively made so that the directions of magnetic fields generated by the windings A and B are opposite to each other. A current obtained by adding a predetermined DC bias current to a current value for generating a magnetic field that cancels the magnetic field generated by the measured current is passed through the winding A, and the winding B is rotated.
The magnetic flux in the magnetic core of the secondary coil is maintained at zero by causing a current of the same ampere turn as the DC bias current of the winding A to flow.
（ホ）作用 従って、単電源の構成で磁気平衡式ホール素子型電流セ
ンサの回路が実現できる。この時、サンプル電圧Ｅは、
DCからACまでの計測電流を、バイアス電圧を中心に計測
電流の振幅値に比例した電圧が得られる。(E) Function Therefore, the circuit of the magnetic balance type Hall element type current sensor can be realized with a single power source configuration. At this time, the sample voltage E is
For the measured current from DC to AC, a voltage proportional to the amplitude value of the measured current centered on the bias voltage can be obtained.
（ヘ）実施例 第１図は本考案による単電源で構成した磁気平衡式ホー
ル素子型電流センサの回路図である。(F) Embodiment FIG. 1 is a circuit diagram of a magnetic balance type Hall element type current sensor constituted by a single power source according to the present invention.
第２図に示した従来回路と異なる点は、二次コイル３に
二つの巻き線Ａ、Ｂを有し、増巾器２にバイアス電圧を
加え、検出電圧をバイアス電圧を中心に振らせて計測電
流をDCからACまで測定する。The difference from the conventional circuit shown in FIG. 2 is that the secondary coil 3 has two windings A and B, a bias voltage is applied to the amplifier 2 and the detection voltage is swung around the bias voltage. Measure current from DC to AC.
以下図における動作を説明する。増巾器２は抵抗R11、R
12、R13で分圧された電圧でバイアスされている。The operation in the figure will be described below. The amplifier 2 has resistors R 11 and R
12 , biased with a voltage divided by R 13 .
計測電流I1がゼロ時、増巾器２はバイアス電圧Ｖとコイ
ル３の巻き線Ａの巻き数N2及びサンプル抵抗R2からアン
ペアターンは（V/R2）×N2となり、巻き線Ｂには、巻き
線Ａとは逆方向に巻き、電源から可変抵抗R10を介して
次式が成り立つように電流を流す。When the measured currents I 1 is zero, The amplifier 2 turns N 2 and ampere-turns from the sample resistance R 2 of the winding A of the bias voltage V and the coil 3 (V / R 2) × N 2, and the winding B is wound in the direction opposite to the winding A, and a current is supplied from the power source through the variable resistor R 10 so that the following equation is satisfied.
（V/R2）×N2＝（Vcc/R10）×N3 つまり、巻き線ＡとＢで等アンペアターンが成立する。(V / R 2 ) × N 2 = (Vcc / R 10 ) × N 3 That is, the equal ampere-turn is established in the windings A and B.
ここで、N3は巻き線Ｂの巻き数で巻き線ＡとＢの抵抗分
は省略する。Here, N 3 is the number of windings of the winding B, and the resistance component of the windings A and B is omitted.
この時、ホール素子１は定電圧駆動を行い、ダイオード
D1、D2の電圧降下分で実現している。At this time, the Hall element 1 is driven at a constant voltage and the diode
It is realized by the voltage drop of D 1 and D 2 .
すなわち、計測電流I1が正であれば、（電源電圧Vcc−
バイアス電圧）間を移動し、負であれば（バイアス電圧
−０）間を移動する。That is, if the measured current I 1 is positive, (power supply voltage Vcc−
Bias voltage), and if negative, moves between (bias voltage-0).
（ト）考案の効果 本考案によれば、従来磁気平衡式ホール素子型電流セン
サの回路構成では二つの電源が必要であったが、単電源
での回路構成により磁気平衡式ホール素子型電流センサ
が実現できる。(G) Effect of the Invention According to the present invention, two power supplies were required in the circuit configuration of the conventional magnetic balance type Hall element type current sensor, but the magnetic balance type Hall element type current sensor has a single power source circuit configuration. Can be realized.
第１図は本考案による磁気平衡式ホール素子型電流セン
サの回路構成図、第２図は従来例の回路構成図である。 １……ホール素子、２……増巾器、３……コイル、Ａ、
Ｂ……巻き線。FIG. 1 is a circuit configuration diagram of a magnetic balance type Hall element type current sensor according to the present invention, and FIG. 2 is a circuit configuration diagram of a conventional example. 1 ... Hall element, 2 ... amplifier, 3 ... coil, A,
B ... winding.
Claims (1)
て、二次コイルに二つの巻き線Ａ、Ｂを有し、該巻き線
Ａ、Ｂの発する磁界の向きが互いに逆となるようにそれ
ぞれを巻回し、計測電流により発生する磁界を打ち消す
磁界を発生させる電流値に、所定の直流バイアス電流を
加えた電流を前記巻き線Ａに流し、前記巻き線Ｂに巻き
線Ａの前記直流バイアス電流と同じアンペアターンの電
流を流すことで、前記二次コイルの磁心内の磁束をゼロ
に保つようにしたことを特徴とする磁気平衡式ホール素
子型電流センサの単電源回路方式。1. A magnetic balance type Hall element type current sensor, wherein a secondary coil has two windings A and B, and the windings A and B are arranged such that the directions of magnetic fields generated by the windings A and B are opposite to each other. A current obtained by adding a predetermined DC bias current to a current value for generating a magnetic field for winding and canceling the magnetic field generated by the measurement current is passed through the winding A, and the winding B is supplied with the DC bias current of the winding A. A single power supply circuit system of a magnetic balance type Hall element type current sensor, characterized in that the magnetic flux in the magnetic core of the secondary coil is maintained at zero by passing the same ampere-turn current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6628290U JPH0742143Y2 (en) | 1990-06-22 | 1990-06-22 | Single power supply circuit method of magnetic balance type Hall element type current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6628290U JPH0742143Y2 (en) | 1990-06-22 | 1990-06-22 | Single power supply circuit method of magnetic balance type Hall element type current sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0424070U JPH0424070U (en) | 1992-02-27 |
| JPH0742143Y2 true JPH0742143Y2 (en) | 1995-09-27 |
Family
ID=31598862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6628290U Expired - Lifetime JPH0742143Y2 (en) | 1990-06-22 | 1990-06-22 | Single power supply circuit method of magnetic balance type Hall element type current sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742143Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2682762A1 (en) * | 2012-07-06 | 2014-01-08 | Senis AG | Current transducer for measuring an electrical current, magnetic transducer and current leakage detection system and method |
| JP2015087210A (en) * | 2013-10-30 | 2015-05-07 | 矢崎総業株式会社 | Current detector |
-
1990
- 1990-06-22 JP JP6628290U patent/JPH0742143Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0424070U (en) | 1992-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2923307B2 (en) | Current sensor | |
| JP3212985B2 (en) | Magnetic sensor device and current sensor device | |
| RU2108587C1 (en) | Current intensity measuring transducer | |
| US4278940A (en) | Means for automatically compensating DC magnetization in a transformer | |
| KR100993928B1 (en) | Magnetic bridge type current sensor, magnetic bridge type current detection method, and magnetic bridge used in the sensor and detection method | |
| EP0380562B1 (en) | Magnetometer employing a saturable core inductor | |
| US4859944A (en) | Single-winding magnetometer with oscillator duty cycle measurement | |
| JPH10513549A (en) | DC and AC current sensors with sub-loop operated current transformers | |
| JPH0829456A (en) | Current sensor based on compensation principle | |
| US9804203B2 (en) | Compensation current sensor arrangement | |
| US6774618B2 (en) | Magnetic flux sensor and method | |
| JP2816175B2 (en) | DC current measuring device | |
| JP4716030B2 (en) | Current sensor | |
| JPH0742143Y2 (en) | Single power supply circuit method of magnetic balance type Hall element type current sensor | |
| US7256574B2 (en) | Device for measuring electric current intensity | |
| JPH06347489A (en) | Electric current sensor | |
| JPS59120803A (en) | Measuring probe for gear | |
| JP4035773B2 (en) | Current sensor | |
| JP2000266786A (en) | Current sensor | |
| US5831424A (en) | Isolated current sensor | |
| JPH07119777B2 (en) | Current sensor | |
| JPH0244261A (en) | Current detection method and power supply device | |
| JPS6212862B2 (en) | ||
| SU859936A1 (en) | Magnetic current comparator | |
| JPS61119016A (en) | Direct current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |