JP6403326B2 - 電流センサ - Google Patents
電流センサ Download PDFInfo
- Publication number
- JP6403326B2 JP6403326B2 JP2014549321A JP2014549321A JP6403326B2 JP 6403326 B2 JP6403326 B2 JP 6403326B2 JP 2014549321 A JP2014549321 A JP 2014549321A JP 2014549321 A JP2014549321 A JP 2014549321A JP 6403326 B2 JP6403326 B2 JP 6403326B2
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- JP
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- Prior art keywords
- mtj
- bridge
- sensor
- temperature compensation
- compensation resistor
- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/205—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using magneto-resistance devices, e.g. field plates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/10—AC or DC measuring bridges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/32—Compensating for temperature change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
- G01R33/098—Magnetoresistive devices comprising tunnel junctions, e.g. tunnel magnetoresistance sensors
Description
Claims (3)
- MTJセンサブリッジ、前記MTJセンサブリッジの近くにあってテスト電流を搬送する導体、および少なくとも1つのMTJ温度補償抵抗器と前記少なくとも1つのMTJ温度補償抵抗器の横に設置される磁石を備えるシングルチップ電流センサであって、
前記MTJセンサブリッジは、1つまたは複数のMTJ抵抗器を含み、
前記MTJ抵抗器および前記MTJ温度補償抵抗器は、それぞれ、1つまたは直列に接続された複数のMTJ素子を備え、
前記MTJ素子のすべては、同じ温度係数、RHおよびRLを有し、
前記RHは高い抵抗状態での前記MTJ素子の抵抗であり、前記RLは低い抵抗状態での前記MTJ素子の抵抗であり、
前記磁石が、前記少なくとも1つのMTJ温度補償抵抗器の横に置かれることによって、前記少なくとも1つのMTJ温度補償抵抗器の中の前記MTJ素子の自由層をバイアスする磁場を産出し、前記少なくとも1つのMTJ温度補償抵抗器の中の前記MTJ素子の自由層の磁化方向が、そのピンド層の磁化方向と反平行になるようにし、したがって前記少なくとも1つのMTJ温度補償抵抗器が、前記電流センサの測定範囲で温度の関数としてのみ変化する高い抵抗状態になるようにし、
前記MTJセンサブリッジは、前記少なくとも1つのMTJ温度補償抵抗器と直列に接続されてセンサブリッジ電圧出力を安定化し、前記導体の中のテスト電流によって産出された磁場を測定することによって前記テスト電流を決定し、次いで前記テスト電流は出力電圧として提供されるシングルチップ電流センサ。 - 前記MTJセンサブリッジはハーフブリッジである、請求項1に記載のシングルチップ電流センサ。
- 前記MTJセンサブリッジはフルブリッジである、請求項1に記載のシングルチップ電流センサ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110452834.2 | 2011-12-30 | ||
CN2011104528342A CN102419393B (zh) | 2011-12-30 | 2011-12-30 | 一种电流传感器 |
PCT/CN2012/083742 WO2013097542A1 (zh) | 2011-12-30 | 2012-10-30 | 一种电流传感器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2015503735A JP2015503735A (ja) | 2015-02-02 |
JP6403326B2 true JP6403326B2 (ja) | 2018-10-10 |
Family
ID=45943900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014549321A Active JP6403326B2 (ja) | 2011-12-30 | 2012-10-30 | 電流センサ |
Country Status (5)
Country | Link |
---|---|
US (1) | US9465056B2 (ja) |
EP (1) | EP2801834A4 (ja) |
JP (1) | JP6403326B2 (ja) |
CN (1) | CN102419393B (ja) |
WO (1) | WO2013097542A1 (ja) |
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CN103217570B (zh) * | 2013-03-21 | 2015-04-15 | 无锡凌湖科技有限公司 | Tmr自温补数字电流传感器 |
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CN103384141B (zh) * | 2013-07-24 | 2015-05-06 | 江苏多维科技有限公司 | 一种磁阻混频器 |
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CN103995240B (zh) * | 2014-05-30 | 2017-11-10 | 江苏多维科技有限公司 | 一种磁电阻z轴梯度传感器芯片 |
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KR102527257B1 (ko) | 2016-12-02 | 2023-04-28 | 퍼듀 리서치 파운데이션 | 차량 배터리 전류 감지 시스템 |
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2011
- 2011-12-30 CN CN2011104528342A patent/CN102419393B/zh active Active
-
2012
- 2012-10-30 WO PCT/CN2012/083742 patent/WO2013097542A1/zh active Application Filing
- 2012-10-30 EP EP12863825.1A patent/EP2801834A4/en active Pending
- 2012-10-30 US US14/368,299 patent/US9465056B2/en active Active
- 2012-10-30 JP JP2014549321A patent/JP6403326B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
US20140327437A1 (en) | 2014-11-06 |
US9465056B2 (en) | 2016-10-11 |
CN102419393B (zh) | 2013-09-04 |
EP2801834A4 (en) | 2015-12-09 |
WO2013097542A1 (zh) | 2013-07-04 |
CN102419393A (zh) | 2012-04-18 |
JP2015503735A (ja) | 2015-02-02 |
EP2801834A1 (en) | 2014-11-12 |
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