JP2004020455A - Current detector - Google Patents

Current detector Download PDF

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Publication number
JP2004020455A
JP2004020455A JP2002177937A JP2002177937A JP2004020455A JP 2004020455 A JP2004020455 A JP 2004020455A JP 2002177937 A JP2002177937 A JP 2002177937A JP 2002177937 A JP2002177937 A JP 2002177937A JP 2004020455 A JP2004020455 A JP 2004020455A
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Prior art keywords
current
voltage
magnetic field
hall element
output
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JP2002177937A
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JP3916225B2 (en
Inventor
Fuyuki Kurokawa
黒川　冬樹
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Toshiba Corp
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To measure a direct current component of a measured current to allow highly precise measurement, by a current detector provided with two Hall elements. <P>SOLUTION: This current detector 11 has a current/magnetic field conversion means 19 for converting the detected current into a magnetic field, the first Hall element 17A and the second Hall element 17B for outputting voltages proportional to a product of a control current and the magnetic field applied from the current/magnetic field conversion means 19, an adder 25 for summing up outputs from the first Hall element 17A and the second Hall element 17B, the first variable resistance element 27A connected to the first Hall element 17A, of which the resistance value is varied by a voltage of the adder 25, and the second variable resistance element 27B connected to the second Hall element 17B, of which the resistance value is varied by the voltage of the adder 25. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、ホール素子を用いて電流を検出する電流検出装置に関する。
【０００２】
【従来の技術】
ホール素子１７を用いた電流検出装置１１の従来技術の一例を図４、図５を参照しながら説明する。図４は従来の電流検出装置１１を示す回路図である。また、図５は従来の電流検出装置の電流／磁界変換器（コア）３１を示す図である。定電圧源１３の出力電圧は、電圧／電流変換器１５によって定電圧源１３の出力電圧に正比例した電流に変換される。この電流は、ホール素子１７のＴ１へ制御電流として加えられる。
一方、図５に示される電流／磁界変換器（コア）３１には電流入力端子２１が設けられ、被測定系の電流を入力する。この電流入力端子２１には、通常５Ａ、３０Ａ、１２０Ａ等の交流電流が入力される。この入力された電流は、コア３１によって電流に正比例した磁界に変換される。この変換された磁界はホール素子１７に加えられる。
ホール素子１７は、電流端子Ｔ１−Ｔ２間に流れる制御電流と加えられる磁界との積に正比例した電圧をＴ３−Ｔ４間に出力する。ホール素子１７の出力端子Ｔ３−Ｔ４間に出力される電圧は、増幅器２３によって増幅される。
ホール素子１７自体が不平衡成分を持っている場合、電流検出結果は図６に示される増幅器出力電圧波形Ｃのようにオフセット電圧を持っている。これを補正するため、ホール素子１７の端子Ｔ４−Ｔ２間に固定抵抗器（Ｒ）２９、端子Ｔ３−Ｔ２間に可変抵抗素子２７を接続し、可変抵抗素子２７を制御することによりオフセット電圧を取り除く。ここで、可変抵抗素子２７とは、制御電圧に入力される電圧によって抵抗値が変化する素子であり、ＦＥＴやＣｄｓフォトカプラなどが一般に用いられている。
【０００３】
可変抵抗素子２７は、図４に示される増幅器出力電圧（Ｃ）を積分器３３により積分する。積分された電圧は、図６に示されるように積分器出力電圧波形Ｄとして制御される。これにより、直流成分については負帰還が成立し、図６の増幅器出力電圧波形Ｃのように時間の経過とともにオフセット電圧が補正される。
【０００４】
【発明が解決しようとする課題】
しかしながら、この電流検出装置１１では、被測定電流に直流成分が含まれる場合、図４の増幅器出力電圧Ｃを積分することにより、直流成分とオフセット成分はともにオフセット電圧として可変抵抗素子２７に入力されてしまう。この結果、図７の増幅器出力電圧波形Ｃのように、被測定電流の直流成分は出力されず、測定することができない。
本発明は、このような従来の問題点に鑑みてなされたもので、被測定電流の直流成分の測定が可能であり高精度の測定を行うことができる電流検出装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明は、上記課題を解決するために、請求項１に記載の電流検出装置は、ホール素子を用いて被検出電流を検出する電流検出装置において、電圧を供給する電圧源と、この電圧源より入力された電圧に正比例した制御電流を供給する第１の電圧／電流変換器と、前記電圧源より入力された電圧に正比例した制御電流を供給する第２の電圧／電流変換器と、前記被検出電流を磁界に変換する電流／磁界変換手段と、前記第１の電圧／電流変換器より供給された前記制御電流と前記電流／磁界変換手段より加えられた磁界との積に正比例した電圧を出力する第１の電圧出力端子を備えた第１のホール素子と、前記第２の電圧／電流変換器より供給された前記制御電流と前記電流／磁界変換手段より加えられた逆の磁界との積に正比例した電圧を出力する第２の電圧出力端子を備えた第２のホール素子と、前記第１のホール素子より出力された電圧を増幅する第１の増幅器と、前記第２のホール素子より出力された電圧を増幅する第２の増幅器と、前記第１の増幅器の出力と前記第２の増幅器の出力とを加算する加算器と、前記第１の電圧出力端子の一方とグランドとの間に接続され、第１の制御端子を前記加算器の出力に接続し前記第１の制御端子に入力される電圧によって抵抗値が変化する第１の可変抵抗素子と、前記第２の電圧出力端子の一方とグランドとの間に接続され第２の制御端子を前記加算器の出力に接続し前記第２の制御端子に入力される電圧によって抵抗値が変化する第２の可変抵抗素子とを有することを特徴とする。
【０００６】
また、請求項２に記載の電流検出装置は、請求項１において、前記第１のホール素子と前記第２のホール素子、前記第１の増幅器と前記第２のホール素子および前記第１の可変抵抗素子と前記第２の可変抵抗素子はそれぞれ同一の特性を有することを特徴とする。
【０００７】
【発明の実施の形態】
以下、本発明の一実施の形態について説明する。
図１は、本発明の一実施の形態に係る電流検出装置１１の回路図である。電流検出装置１１は、アナロググラウンド（ＡＧ）に接地されるとともに、一定の電圧を出力する定電圧源１３、この定電圧源１３の出力電圧に正比例した電流に変換する電圧／電流変換器１５Ａ（１５Ｂ）、ホール効果により電流を検出するホール素子１７Ａ（１７Ｂ）、ホール素子１７Ａ（１７Ｂ）より出力された電圧を増幅する増幅器２３Ａ（２３Ｂ）、この増幅器２３Ａの出力電圧と増幅器２３Ｂの出力電圧とを加算する加算器２５、オフセット電圧を取り除く可変抵抗素子２７Ａ（２７Ｂ）、オフセット電圧を取り除くために設けられた固定抵抗器２９Ａ（２９Ｂ）から構成される。
定電圧源１３の出力電圧Ａは２つの電圧／電流変換器１５Ａ、１５Ｂによって定電圧源１３の出力電圧に正比例した電流に変換される。この電流は、同一の特性を具備する２つのホール素子１７Ａ、１７Ｂに制御電流として加えられる。
図２は電流／磁界変換器１９を模式的に示した斜視図である。電流／磁界変換器（分割コア）１９は、上下に分割された分割コアＡ１９Ａと分割コアＢ１９Ｂから構成され、ホール素子１７Ａとホール素子１７Ｂとを挟みこむように配置される。また、被測定系の電流を入力する電流入力端子２１が電流／磁界変換器１９の空隙部分を貫通して設けられている。この電流入力端子２１には、通常５Ａ、３０Ａ、１２０Ａなどの電流が入力される。この入力された電流は、分割コア１９Ａと分割コア１９Ｂとにより、電流に正比例した磁界Ｂ１、磁界Ｂ２に変換される。磁界Ｂ１、磁界Ｂ２の方向は図１に示されるように、磁界Ｂ１は紙面奥向き、磁界Ｂ２は紙面手前向きの方向であり、２つのホール素子１７Ａ、１７Ｂにそれぞれ加えられる。ここで、２つのホール素子１７Ａ、１７Ｂに加えられる磁界は、図１に示されるように相反する方向である。
【０００８】
ホール素子１７Ａ、１７Ｂは、電流端子Ｔ１−Ｔ２間に流れる制御電流と加えられる磁界の積に正比例した電圧を出力端子Ｔ３−Ｔ４間に出力する。２つのホール素子１７Ａ、１７Ｂの出力端子Ｔ３−Ｔ４間に出力される電圧は、同一の特性を具備する２つの増幅器２３Ａ、２３Ｂによってそれぞれ増幅される。
図２に示される２つの増幅器２３Ａ、２３Ｂの出力電圧（Ｃ１、Ｃ２）は、加算器２５により加算される。この加算器２５の出力電圧（Ｄ）は、オフセット電圧に従って変化し、この電圧で可変抵抗素子２７Ａ、２７Ｂを制御する。これにより、負帰還を形成し、可変抵抗素子２７Ａ、２７Ｂは、オフセット電圧が基準電位より高いときは、それぞれがホール素子１７Ａ、１７Ｂの出力電圧を小さくする方向に作用し、オフセット電圧が基準電位より低いときは、ホール素子１７Ａ、１７Ｂの出力電圧を大きくする方向に作用することにより、オフセット電圧を基準電位に補正する作用を有する。
ここで、加算器２５の出力電圧は被測定電流の直流成分に影響されない為、被測定電流の直流成分を測定可能なホール素子１７Ａ、１７Ｂのオフセット補正が実現できる。
【０００９】
図３は、ホール素子１７Ａ、１７Ｂに加えられる定電圧波形Ａ、ホール素子１７Ａ、１７Ｂに加えられる磁界波形Ｂ１、Ｂ２、増幅器２３Ａ、２３Ｂの増幅器出力波形Ｃ１、Ｃ２、加算器２５の加算器出力電圧波形Ｄを示す。増幅器２３Ａ、２３Ｂの出力電圧波形Ｃ１，Ｃ２のように、時間の経過とともに、ホール素子１７Ａ、１７Ｂのオフセット電圧が補正されており、この補正で、被測定電流の直流成分は影響を受けていない。
【００１０】
【発明の効果】
以上説明したように本発明によれば、２つのホール素子１７Ａ、１７Ｂに被測定電流に正比例した磁界を相反する方向で加え、この出力を加算することで被測定電流の直流成分を含まないオフセット電圧を検出し、この電圧をもとにオフセットを補正する。これにより、被測定電流の直流成分を測定し、高精度の測定を行うことが出きる電流検出装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の実施の一形態に係る電流検出装置の回路を示す図。
【図２】本発明の実施の一形態に係る電流検出装置の電流／磁界変換器を示す図。
【図３】本発明の実施の一形態に係る電流検出装置の回路のタイムチャートを示す図。
【図４】従来の電流検出装置の回路を示す図。
【図５】従来の電力検出装置の電流／磁界変換器を示す図。
【図６】従来の電流検出装置のタイムチャートを示す図。
【図７】従来の電流検出装置のタイムチャートを示す図。
【符号の説明】
１１…電流検出装置、１３…定電圧源、１５…電圧／電流変換器、１５Ａ…電圧／電流変換器Ａ、１５Ｂ…電圧／電流変換器Ｂ、１７…ホール素子、１７Ａ…ホール素子Ａ、１７Ｂ…ホール素子Ｂ、１９…電流／磁界変換器（分割コア）、１９Ａ…分割コアＡ、１９Ｂ…分割コアＢ、２１…電流入力端子、２３…増幅器、２３Ａ…増幅器Ａ、２３Ｂ…増幅器Ｂ、２５…加算器、２７…可変抵抗素子、２７Ａ…可変抵抗素子Ａ、２７Ｂ…可変抵抗素子Ｂ、２９…抵抗器、２９Ａ…抵抗器Ａ、２９Ｂ…抵抗器Ｂ、３１…電流／磁界変換器（コア）、３３…積分器[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a current detection device that detects a current using a Hall element.
[0002]
[Prior art]
An example of the prior art of the current detection device 11 using the Hall element 17 will be described with reference to FIGS. FIG. 4 is a circuit diagram showing a conventional current detecting device 11. FIG. 5 is a diagram showing a current / magnetic field converter (core) 31 of the conventional current detection device. The output voltage of the constant voltage source 13 is converted by the voltage / current converter 15 into a current that is directly proportional to the output voltage of the constant voltage source 13. This current is applied to T1 of the Hall element 17 as a control current.
On the other hand, the current / magnetic field converter (core) 31 shown in FIG. 5 is provided with a current input terminal 21 to input a current of the system to be measured. The current input terminal 21 receives an alternating current of 5 A, 30 A, 120 A or the like. The input current is converted by the core 31 into a magnetic field that is directly proportional to the current. This converted magnetic field is applied to the Hall element 17.
The Hall element 17 outputs a voltage between T3 and T4 that is directly proportional to the product of the control current flowing between the current terminals T1 and T2 and the applied magnetic field. The voltage output between the output terminals T3 and T4 of the Hall element 17 is amplified by the amplifier 23.
When the Hall element 17 itself has an unbalanced component, the current detection result has an offset voltage like the amplifier output voltage waveform C shown in FIG. To correct this, a fixed resistor (R) 29 is connected between the terminals T4 and T2 of the Hall element 17 and a variable resistor 27 is connected between the terminals T3 and T2, and the offset voltage is controlled by controlling the variable resistor 27. remove. Here, the variable resistance element 27 is an element whose resistance value changes according to a voltage input to the control voltage, and an FET, a Cds photocoupler, or the like is generally used.
[0003]
The variable resistance element 27 integrates the amplifier output voltage (C) shown in FIG. The integrated voltage is controlled as an integrator output voltage waveform D as shown in FIG. As a result, negative feedback is established for the DC component, and the offset voltage is corrected over time as shown by the amplifier output voltage waveform C in FIG.
[0004]
[Problems to be solved by the invention]
However, in the current detection device 11, when the current to be measured includes a DC component, the DC component and the offset component are both input to the variable resistance element 27 as an offset voltage by integrating the amplifier output voltage C of FIG. Would. As a result, like the amplifier output voltage waveform C in FIG. 7, the DC component of the measured current is not output and cannot be measured.
The present invention has been made in view of such conventional problems, and has as its object to provide a current detection device capable of measuring a DC component of a measured current and performing highly accurate measurement. I do.
[0005]
[Means for Solving the Problems]
According to an aspect of the present invention, there is provided a current detecting device for detecting a current to be detected using a Hall element, comprising: a voltage source for supplying a voltage; A first voltage / current converter that supplies a control current that is directly proportional to the input voltage, a second voltage / current converter that supplies a control current that is directly proportional to the voltage input from the voltage source, Current / magnetic field conversion means for converting a current to be detected into a magnetic field; and a voltage directly proportional to the product of the control current supplied from the first voltage / current converter and the magnetic field applied by the current / magnetic field conversion means. A first Hall element having a first voltage output terminal for outputting the control current, the control current supplied from the second voltage / current converter, and a reverse magnetic field applied by the current / magnetic field conversion means. Voltage that is directly proportional to the product of A second Hall element having a second voltage output terminal for inputting a voltage, a first amplifier for amplifying a voltage output from the first Hall element, and a voltage output from the second Hall element. A second amplifier for amplifying, an adder for adding an output of the first amplifier and an output of the second amplifier, and a second amplifier connected between one of the first voltage output terminals and ground; A first variable resistance element having a first control terminal connected to the output of the adder and having a resistance value changed by a voltage input to the first control terminal; one of the second voltage output terminals and ground; And a second variable resistance element connected between the second control terminal and the output of the adder, the resistance value of which changes according to the voltage input to the second control terminal. .
[0006]
Also, in the current detecting device according to claim 2, in claim 1, the first Hall element and the second Hall element, the first amplifier and the second Hall element, and the first variable element. The resistance element and the second variable resistance element have the same characteristics.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
FIG. 1 is a circuit diagram of a current detection device 11 according to one embodiment of the present invention. The current detection device 11 is grounded to an analog ground (AG), outputs a constant voltage, and outputs a constant voltage. A voltage / current converter 15A converts the current into a current directly proportional to the output voltage of the constant voltage source 13 ( 15B), a Hall element 17A (17B) for detecting a current by the Hall effect, an amplifier 23A (23B) for amplifying a voltage output from the Hall element 17A (17B), an output voltage of the amplifier 23A and an output voltage of the amplifier 23B. , A variable resistance element 27A (27B) for removing the offset voltage, and a fixed resistor 29A (29B) provided for removing the offset voltage.
The output voltage A of the constant voltage source 13 is converted by two voltage / current converters 15A and 15B into a current that is directly proportional to the output voltage of the constant voltage source 13. This current is applied as a control current to two Hall elements 17A and 17B having the same characteristics.
FIG. 2 is a perspective view schematically showing the current / magnetic field converter 19. The current / magnetic field converter (split core) 19 includes a split core A19A and a split core B19B, which are split vertically, and is arranged so as to sandwich the Hall element 17A and the Hall element 17B. Further, a current input terminal 21 for inputting a current of the system to be measured is provided so as to penetrate a gap portion of the current / magnetic field converter 19. Normally, a current of 5 A, 30 A, 120 A or the like is input to the current input terminal 21. The input current is converted by the split cores 19A and 19B into a magnetic field B1 and a magnetic field B2 that are directly proportional to the current. As shown in FIG. 1, the directions of the magnetic field B1 and the magnetic field B2 are such that the magnetic field B1 is directed toward the rear of the paper and the magnetic field B2 is directed toward the front of the paper, and are applied to the two Hall elements 17A and 17B, respectively. Here, the magnetic fields applied to the two Hall elements 17A and 17B are in opposite directions as shown in FIG.
[0008]
The Hall elements 17A and 17B output a voltage between the output terminals T3 and T4 in direct proportion to the product of the control current flowing between the current terminals T1 and T2 and the applied magnetic field. Voltages output between the output terminals T3 and T4 of the two Hall elements 17A and 17B are amplified by two amplifiers 23A and 23B having the same characteristics.
The output voltages (C1, C2) of the two amplifiers 23A, 23B shown in FIG. The output voltage (D) of the adder 25 changes in accordance with the offset voltage, and controls the variable resistance elements 27A and 27B with this voltage. Thereby, a negative feedback is formed, and when the offset voltage is higher than the reference potential, the variable resistance elements 27A and 27B act in a direction to reduce the output voltage of the Hall elements 17A and 17B, respectively, and the offset voltage is changed to the reference potential. When it is lower, the offset voltage is corrected to the reference potential by acting in a direction to increase the output voltages of the Hall elements 17A and 17B.
Here, since the output voltage of the adder 25 is not affected by the DC component of the measured current, the offset correction of the Hall elements 17A and 17B capable of measuring the DC component of the measured current can be realized.
[0009]
FIG. 3 shows a constant voltage waveform A applied to the Hall elements 17A and 17B, magnetic field waveforms B1 and B2 applied to the Hall elements 17A and 17B, amplifier output waveforms C1 and C2 of the amplifiers 23A and 23B, and an adder output of the adder 25. 3 shows a voltage waveform D. Like the output voltage waveforms C1 and C2 of the amplifiers 23A and 23B, the offset voltage of the Hall elements 17A and 17B is corrected over time, and the DC component of the measured current is not affected by this correction. .
[0010]
【The invention's effect】
As described above, according to the present invention, a magnetic field that is directly proportional to the current to be measured is applied to the two Hall elements 17A and 17B in opposite directions, and the outputs thereof are added to obtain an offset that does not include the DC component of the current to be measured. The voltage is detected, and the offset is corrected based on the voltage. Thus, it is possible to provide a current detection device that can measure the DC component of the current to be measured and perform highly accurate measurement.
[Brief description of the drawings]
FIG. 1 is a diagram showing a circuit of a current detection device according to one embodiment of the present invention.
FIG. 2 is a diagram showing a current / magnetic field converter of the current detection device according to one embodiment of the present invention.
FIG. 3 is a diagram showing a time chart of a circuit of the current detection device according to one embodiment of the present invention.
FIG. 4 is a diagram showing a circuit of a conventional current detection device.
FIG. 5 is a diagram showing a current / magnetic field converter of a conventional power detection device.
FIG. 6 is a diagram showing a time chart of a conventional current detection device.
FIG. 7 is a diagram showing a time chart of a conventional current detection device.
[Explanation of symbols]
11: Current detection device, 13: Constant voltage source, 15: Voltage / current converter, 15A: Voltage / current converter A, 15B: Voltage / current converter B, 17: Hall element, 17A: Hall element A, 17B ... Hall element B, 19 ... Current / magnetic field converter (split core), 19A ... Split core A, 19B ... Split core B, 21 ... Current input terminal, 23 ... Amplifier, 23A ... Amplifier A, 23B ... Amplifier B, 25 ... Adder, 27 ... Variable resistance element, 27A ... Variable resistance element A, 27B ... Variable resistance element B, 29 ... Resistor, 29A ... Resistor A, 29B ... Resistor B, 31 ... Current / magnetic field converter (core ), 33 ... Integrator

Claims (2)

ホール素子を用いて被検出電流を検出する電流検出装置において、
電圧を供給する電圧源と、
この電圧源より入力された電圧に正比例した制御電流を供給する第１の電圧／電流変換器と、
前記電圧源より入力された電圧に正比例した制御電流を供給する第２の電圧／電流変換器と、
前記被検出電流を磁界に変換する電流／磁界変換手段と、
前記第１の電圧／電流変換器より供給された前記制御電流と前記電流／磁界変換手段より加えられた磁界との積に正比例した電圧を出力する第１の電圧出力端子を備えた第１のホール素子と、
前記第２の電圧／電流変換器より供給された前記制御電流と前記電流／磁界変換手段より加えられた逆の磁界との積に正比例した電圧を出力する第２の電圧出力端子を備えた第２のホール素子と、
前記第１のホール素子より出力された電圧を増幅する第１の増幅器と、
前記第２のホール素子より出力された電圧を増幅する第２の増幅器と、
前記第１の増幅器の出力と前記第２の増幅器の出力とを加算する加算器と、
前記第１の電圧出力端子の一方とグランドとの間に接続され、第１の制御端子を前記加算器の出力に接続し前記第１の制御端子に入力される電圧によって抵抗値が変化する第１の可変抵抗素子と、前記第２の電圧出力端子の一方とグランドとの間に接続され第２の制御端子を前記加算器の出力に接続し前記第２の制御端子に入力される電圧によって抵抗値が変化する第２の可変抵抗素子と
を有することを特徴とする電流検出装置。In a current detection device that detects a current to be detected using a Hall element,
A voltage source for supplying voltage;
A first voltage / current converter that supplies a control current that is directly proportional to the voltage input from the voltage source;
A second voltage / current converter that supplies a control current that is directly proportional to the voltage input from the voltage source;
Current / magnetic field conversion means for converting the detected current into a magnetic field;
A first voltage output terminal that outputs a voltage that is directly proportional to the product of the control current supplied from the first voltage / current converter and the magnetic field applied by the current / magnetic field conversion means; A Hall element,
A second voltage output terminal that outputs a voltage that is directly proportional to the product of the control current supplied from the second voltage / current converter and an opposite magnetic field applied by the current / magnetic field conversion means; 2 Hall elements,
A first amplifier for amplifying a voltage output from the first Hall element;
A second amplifier for amplifying a voltage output from the second Hall element;
An adder for adding an output of the first amplifier and an output of the second amplifier;
A first control terminal connected between one of the first voltage output terminals and a ground, a first control terminal connected to an output of the adder, and a resistance value changed by a voltage input to the first control terminal. 1 variable resistance element, a second control terminal connected between one of the second voltage output terminals and the ground, a second control terminal connected to the output of the adder, and a voltage input to the second control terminal. A current detection device comprising: a second variable resistance element having a variable resistance value. 前記第１のホール素子と前記第２のホール素子、前記第１の増幅器と前記第２のホール素子および前記第１の可変抵抗素子と前記第２の可変抵抗素子はそれぞれ同一の特性を有することを特徴とする請求項１に記載の電流検出装置。The first Hall element and the second Hall element, the first amplifier and the second Hall element, and the first variable resistance element and the second variable resistance element have the same characteristics, respectively. The current detection device according to claim 1, wherein:
JP2002177937A 2002-06-19 2002-06-19 Current detector Expired - Fee Related JP3916225B2 (en)

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Cited By (8)

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JP2008157688A (en) * 2006-12-21 2008-07-10 Honda Motor Co Ltd Current sensor and method of eliminating offset of current sensor
JP2008164297A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP2008164298A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP2008164299A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP2009281771A (en) * 2008-05-20 2009-12-03 Honda Motor Co Ltd Current sensor
JP2009281772A (en) * 2008-05-20 2009-12-03 Honda Motor Co Ltd Current sensor
RU2445638C1 (en) * 2010-08-16 2012-03-20 Федеральное государственное унитарное предприятие "Научно-производственное объединение автоматики имени академика Н.А. Семихатова" Current sensor
KR20140078125A (en) * 2012-12-17 2014-06-25 엘지이노텍 주식회사 sensor error compensation apparatus and method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008157688A (en) * 2006-12-21 2008-07-10 Honda Motor Co Ltd Current sensor and method of eliminating offset of current sensor
JP2008164297A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP2008164298A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP2008164299A (en) * 2006-12-26 2008-07-17 Honda Motor Co Ltd Current sensor, and offset removal method for current sensor
JP4590395B2 (en) * 2006-12-26 2010-12-01 本田技研工業株式会社 Current sensor and current sensor offset removal method
JP4590394B2 (en) * 2006-12-26 2010-12-01 本田技研工業株式会社 Current sensor and current sensor offset removal method
JP2009281771A (en) * 2008-05-20 2009-12-03 Honda Motor Co Ltd Current sensor
JP2009281772A (en) * 2008-05-20 2009-12-03 Honda Motor Co Ltd Current sensor
RU2445638C1 (en) * 2010-08-16 2012-03-20 Федеральное государственное унитарное предприятие "Научно-производственное объединение автоматики имени академика Н.А. Семихатова" Current sensor
KR20140078125A (en) * 2012-12-17 2014-06-25 엘지이노텍 주식회사 sensor error compensation apparatus and method
KR101987249B1 (en) 2012-12-17 2019-06-11 엘지이노텍 주식회사 sensor error compensation apparatus and method

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