CN202720256U - Electronic circuit for high-precision closed-loop type hall current sensor - Google Patents
Electronic circuit for high-precision closed-loop type hall current sensor Download PDFInfo
- Publication number
- CN202720256U CN202720256U CN 201220025846 CN201220025846U CN202720256U CN 202720256 U CN202720256 U CN 202720256U CN 201220025846 CN201220025846 CN 201220025846 CN 201220025846 U CN201220025846 U CN 201220025846U CN 202720256 U CN202720256 U CN 202720256U
- Authority
- CN
- China
- Prior art keywords
- voltage
- current
- output
- operational amplifier
- current sensor
- 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
Images
Classifications
-
- 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
- G01R15/202—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 Hall-effect devices
-
- 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
- G01R19/003—Measuring mean values of current or voltage during a given time interval
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measuring Magnetic Variables (AREA)
- Hall/Mr Elements (AREA)
Abstract
The utility model belongs to the field of electronic circuits for hall current sensors and discloses an electronic circuit for a high-precision closed-loop type hall current sensor, wherein a current signal is acquired from the power supply terminal of an operational amplifier. Then the current level is transferred and the static biasing is performed on an output triode. The operational amplifier and the output triode together form a voltage-controlled current source (VCS), wherein the current amplification factor is variable. The output terminal of the operational amplifier directly drives or drives a voltage-controlled load resistor having current transferring function. Hall elements are operated at a constant voltage and the arithmetic mean value of the output voltages of the plurality of hall elements is calculated.
Description
Technical field
The utility model relates to the Hall current sensor field of electronic circuitry, relates in particular to a kind of high precision closed loop type Hall current sensor electronic circuit.
Background technology
Current sensor is very widely electronic package of a kind of application, and it is widely used in various Semiconductor Converting Technologies, interchange numerical control device etc. with in the automatic control field of electric current as control object.
Non-cpntact measurement and method for supervising to electric current are a lot, and Hall current sensor forms industrialization because its excellent cost performance is widely used; Hall current sensor has open loop, two kinds of mode of operations of closed loop usually, the closed-loop type Hall current sensor is comprised of toroidal core, Hall element, secondary coil and the suitable power amplification circuit made with soft magnetic material with air gap, here Hall element plays the nulling device, therefore its sensitivity is more high better, the high sensitivity Hall element that generally selects the InSb material to make, its correlation properties as shown in Figure 1 and Figure 2.Existing closed-loop type Hall current sensor electronic-circuit diagram such as Fig. 3, wide power scope closed-loop type Hall current sensor electronic-circuit diagram such as Fig. 4, there is following problem in these two kinds of electronic circuits: 1, such as Fig. 1, the unbalance voltage of InSb Hall element its temperature characterisitic under the constant voltage condition of work is very smooth.And in Fig. 3, Fig. 4, when one timing of sensor supply voltage, Hall element is all worked under constant current conditions in two kinds of electronic circuits, when working temperature is lower than 0 ℃, the temperature at zero point of sensor is floated will be very large, have a strong impact on the current measurement precision of sensor, thereby limited the operating temperature range of sensor.
2. the output terminal of operational amplifier drives emitter follower without biasing in two kinds of electronic circuits, therefore with the current sensor of this electronic circuit when measuring exchange current, the very serious intermodulation distortion of existence in its output waveform! In Fig. 3, the emitter follower export structure without biasing makes the output voltage of current sensor can't reach rail-to-rail (rail to rail), has affected linear measurement range and the antisaturation ability of current sensor to electric current.
3. such as Fig. 4, output terminal from amplifier, amplifier output is voltage-controlled current source (VCS) without biasing of control directly, its voltage-controlled pull-up resistor is directly setovered by the supply voltage of current sensor, larger its quiescent dissipation of the output current of voltage-controlled current source (VCS) is larger, power consumption on the voltage-controlled pull-up resistor is larger, and therefore voltage-controlled pull-up resistor must be high-power resistance.
Summary of the invention
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide the high precision closed loop type Hall current sensor that a kind of measurement range is large, power consumption is little, precision is high electronic circuit.
Complete skill scheme of the present utility model is, a kind of high precision closed loop type Hall current sensor electronic circuit is from operational amplifier power end obtaining current signal and power up to flat turn and move and output triode is carried out quiescent biasing; Operational amplifier and output triode form voltage-controlled current source and belt variable current amplification factor; The voltage-controlled pull-up resistor that operational amplifier output terminal directly drives or the rotating band level shifts; Hall element is adopted constant voltage work, the output voltage of a plurality of Hall elements is asked arithmetic mean;
The voltage-controlled pull-up resistor that described operational amplifier output terminal directly drives or the rotating band level shifts, the output current value size variation of the selective basis current sensor of voltage-controlled pull-up resistor size and selecting, voltage-controlled current source output triode are chosen as respectively a kind of in the large power triode of middle pliotron, 5W of low-power transistor, the 3W of 0.5W-1W;
The bias voltage of described Hall element adopts 0.6V-2.0V.
Therefore the utility model has been compared following beneficial effect with present technology:
1, of the present utility model from operational amplifier power end obtaining current signal and power up to flat turn and move and output triode is carried out quiescent biasing, make that output triode output is undistorted and working power voltage sensor is wider; Operational amplifier and triode form voltage-controlled current source (VCS) and belt variable current amplification factor, the voltage-controlled pull-up resistor that operational amplifier output terminal directly drives or the rotating band level shifts, make the output voltage of Hall element directly drive voltage-controlled current source (VCS), make signal transmission progression fewer, transmission time is shorter, the response speed of sensor is faster, working band is wider, and very little with very little power drive larger power and quiescent dissipation.
2, Hall element is adopted the constant voltage mode of operation, arithmetic mean is asked in a plurality of Hall element outputs, make the temperature stability of sensor output better, operating temperature range is wider; Sensor is less to the measuring position error of electric current, measuring accuracy is higher, measurement lower limit is lower; Production efficiency is higher, and manufacturing cost is lower, has really accomplished good and cheap! Temperature was floated and was 30ppm/ ℃～100ppm/ ℃ at zero point its; Operation temperature area reaches-40～85 ℃.
3, adopt utility model people application another patent--core-theaded type high-precision hall closed-loop type Hall current sensor cooperates with Fig. 9, two kinds of circuit of Figure 10 with coaxial double loop magnetic core coil assembly, make little electric current (electric current to be measured that 25A is following) realize the core-theaded type high-acruracy survey, measuring accuracy reaches in the 0.2%FS, and the above Super-Current Measurement precision of 50A reaches in the 0.1%FS.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, does not consist of to improper restriction of the present utility model, in the accompanying drawings:
Fig. 1 is the temperature characteristics figure of the unbalance voltage of InSb Hall element;
Fig. 2 is the temperature characteristics figure of the output voltage of InSb Hall element;
Fig. 3 is existing closed-loop type Hall current sensor electronic-circuit diagram;
Fig. 4 is the closed-loop type Hall current sensor electronic-circuit diagram of existing wide power scope;
Fig. 5 is full PCB installing type Voltage-output closed-loop type Hall current sensor electronic circuit block diagram;
Fig. 6 is wide power scope electric current output high precision closed loop type Hall current sensor circuit block diagram;
Fig. 7 is full PCB installing type electric current output closed-loop type Hall current sensor circuit diagram;
Fig. 8 is full PCB installing type Voltage-output closed-loop type Hall current sensor circuit diagram;
Fig. 9 is high-precision current output closed-loop type Hall current sensor circuit diagram;
Figure 10 is wide power scope high-precision current output closed-loop type Hall current sensor circuit diagram.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to restriction of the present utility model.
Embodiment:
A kind of high precision closed loop type of the present embodiment Hall current sensor electronic circuit, full PCB installing type Voltage-output closed-loop type Hall current sensor electronic circuit block diagram such as Fig. 5, from operational amplifier BA4580 power end obtaining current signal and output triode is carried out quiescent biasing, operational amplifier output terminal directly drive voltage-controlled pull-up resistor, Hall element is adopted constant voltage work, secondary output current is carried out the I/V conversion, be transformed into corresponding Voltage-output, physical circuit such as Fig. 8, Hall element constant voltage bias voltage Vz adopts AZ432-1.25V among the figure; Operational amplifier power end obtaining current signal also carries out quiescent biasing to output triode, diode D8, D9 adopts tandem type schottky diode BAT54S, VD＜0.5V, its temperature characterisitic and silicon double pole triode PN junction temperature characterisitic are very approaching, realization is followed the tracks of compensation to the full warm area of triode quiescent bias current, different according to the output triode kind, adjust the size of quiescent biasing resistance, make Vbe＞0.58V and the 2mA＜Ic＜10mA of output triode, R12=R13, R15=R16, R15/R12=R16/R13 are the current amplification factor of voltage-controlled current source (VCS); Double operational BA4580 and sample resistance R17 realize the I/V conversion, and R18=R19 is the sampling of double operational current uniform and anti-short-circuit resistance, and C4=C5=1000PF is respectively and improves double operational output terminal capacitance load capability and filter capacitor; D3 is that the secondary coil high pressure discharges diode, and the amplifier input end is protected; Voltage-controlled current source (VCS) output triode is the low-power transistor of 0.5W-1W.
Full PCB installing type electric current output closed-loop type Hall current sensor circuit diagram such as Fig. 7 compare with Fig. 8, have lacked I/V transducer and operational amplifier output terminal and have directly driven pull-up resistor and change the pull-up resistor that operational amplifier output terminal rotating band level moves into.
Fig. 9, Figure 10 compare with Fig. 7, two all constant voltage work of Hall element, the signal processing mode of asking arithmetic mean is all adopted in its output, few one times of the pull-up resistor resistance that operational amplifier output terminal rotating band level moves among Fig. 9, output triode is pliotron among the 3W, to drive larger output current; Few two times of the pull-up resistor resistance that operational amplifier output terminal rotating band level moves among Figure 10, output triode is the 5W large power triode, to drive larger output current, in addition, for satisfying the wide power area requirement, from operational amplifier power end obtaining current signal and power up to flat turn and move and output triode is carried out quiescent biasing.
Therefore,
1, of the present utility model from operational amplifier power end obtaining current signal and power up to flat turn and move and output triode is carried out quiescent biasing, make that output triode output is undistorted and working power voltage sensor is wider; Operational amplifier and triode form voltage-controlled current source (VCS) and belt variable current amplification factor, the voltage-controlled pull-up resistor that operational amplifier output terminal directly drives or the rotating band level shifts, make the output voltage of Hall element directly drive voltage-controlled current source (VCS), make signal transmission progression fewer, transmission time is shorter, the response speed of sensor is faster, working band is wider, and very little with very little power drive larger power and quiescent dissipation.
2, Hall element is adopted the constant voltage mode of operation, arithmetic mean is asked in a plurality of Hall element outputs, make the temperature stability of sensor output better, operating temperature range is wider; Sensor is less to the measuring position error of electric current, measuring accuracy is higher, measurement lower limit is lower; Production efficiency is higher, and manufacturing cost is lower, has really accomplished good and cheap! Temperature was floated and was 30ppm/ ℃～100ppm/ ℃ at zero point its; Operation temperature area reaches-40～85 ℃.
3, adopt utility model people application another patent--core-theaded type high-precision hall closed-loop type Hall current sensor cooperates with Fig. 9, two kinds of circuit of Figure 10 with coaxial double loop magnetic core coil assembly, make little electric current (electric current to be measured that 25A is following) realize the core-theaded type high-acruracy survey, measuring accuracy reaches in the 0.2%FS, and the above Super-Current Measurement precision of 50A reaches in the 0.1%FS.
The above technical scheme that the utility model embodiment is provided is described in detail, used specific case herein principle and the embodiment of the utility model embodiment are set forth, the explanation of above embodiment is only applicable to help to understand the principle of the utility model embodiment; Simultaneously, for one of ordinary skill in the art, according to the utility model embodiment, all will change on embodiment and range of application, in sum, this description should not be construed as restriction of the present utility model.
Claims (3)
1. a high precision closed loop type Hall current sensor electronic circuit is characterized in that, from operational amplifier power end obtaining current signal and power up to flat turn and move and output triode is carried out quiescent biasing; Operational amplifier and output triode form voltage-controlled current source and belt variable current amplification factor; The voltage-controlled pull-up resistor that operational amplifier output terminal directly drives or the rotating band level shifts; Hall element is adopted constant voltage work, the output voltage of a plurality of Hall elements is asked arithmetic mean.
2. a kind of high precision closed loop type Hall current sensor electronic circuit according to claim 1, it is characterized in that, the voltage-controlled pull-up resistor that operational amplifier output terminal directly drives or the rotating band level shifts, the output current value size variation of the selective basis current sensor of the size of voltage-controlled pull-up resistor and selecting, voltage-controlled current source output triode are chosen as respectively a kind of in the large power triode of middle pliotron, 5W of low-power transistor, the 3W of 0.5W-1W.
3. a kind of high precision closed loop type Hall current sensor electronic circuit according to claim 1 is characterized in that, the bias voltage of described Hall element adopts 0.6V-2.0V.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220025846 CN202720256U (en) | 2012-01-19 | 2012-01-19 | Electronic circuit for high-precision closed-loop type hall current sensor |
| CN201280056664.9A CN104395765B (en) | 2012-01-19 | 2012-02-09 | A kind of high precision closed loop type Hall current sensor electronic circuit |
| PCT/CN2012/000158 WO2013106962A1 (en) | 2012-01-19 | 2012-02-09 | High-precision closed-loop electronic circuit for hall current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220025846 CN202720256U (en) | 2012-01-19 | 2012-01-19 | Electronic circuit for high-precision closed-loop type hall current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202720256U true CN202720256U (en) | 2013-02-06 |
Family
ID=47622078
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220025846 Expired - Lifetime CN202720256U (en) | 2012-01-19 | 2012-01-19 | Electronic circuit for high-precision closed-loop type hall current sensor |
| CN201280056664.9A Active CN104395765B (en) | 2012-01-19 | 2012-02-09 | A kind of high precision closed loop type Hall current sensor electronic circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280056664.9A Active CN104395765B (en) | 2012-01-19 | 2012-02-09 | A kind of high precision closed loop type Hall current sensor electronic circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN202720256U (en) |
| WO (1) | WO2013106962A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467220A (en) * | 2015-11-20 | 2016-04-06 | 国网山东省电力公司电力科学研究院 | Portable grounding resistance tester |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3958003A1 (en) * | 2020-08-18 | 2022-02-23 | Siemens Aktiengesellschaft | Current measuring device with hall sensors |
| CN112798843B (en) * | 2021-01-06 | 2023-02-03 | 四川众航电子科技有限公司 | Closed loop type Hall sensor circuit |
| TWI778854B (en) * | 2021-11-03 | 2022-09-21 | 新唐科技股份有限公司 | Electronic system and chip |
| CN116430159B (en) * | 2023-06-14 | 2023-09-26 | 江西斐耳科技有限公司 | Multifunctional test system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3140640B2 (en) * | 1994-09-19 | 2001-03-05 | 矢崎総業株式会社 | Non-contact sensor detection circuit |
| JP2001272423A (en) * | 2000-03-23 | 2001-10-05 | Yazaki Corp | Noncontact-type sensor and offset adjusting method for sensor |
| CN1367390A (en) * | 2001-01-20 | 2002-09-04 | 上海科星自动化技术有限公司 | Impulse current signal detection device |
| CN2689241Y (en) * | 2004-04-26 | 2005-03-30 | 邹高芝 | Single-power supply circuit of current and voltage sensor |
| JP4623289B2 (en) * | 2004-06-21 | 2011-02-02 | Ｔｄｋ株式会社 | Current sensor |
| CN100492244C (en) * | 2007-03-21 | 2009-05-27 | 北京中星微电子有限公司 | Voltage regulator with low voltage difference |
| KR100938892B1 (en) * | 2007-11-23 | 2010-01-27 | 한양대학교 산학협력단 | Dynamic Current Biasing Circuit |
| US8378652B2 (en) * | 2008-12-23 | 2013-02-19 | Texas Instruments Incorporated | Load transient response time of LDOs with NMOS outputs with a voltage controlled current source |
| CN102279305A (en) * | 2011-04-13 | 2011-12-14 | 大连丰和电力科技有限公司 | Closed loop magnetic balance type Hall current sensor |
-
2012
- 2012-01-19 CN CN 201220025846 patent/CN202720256U/en not_active Expired - Lifetime
- 2012-02-09 CN CN201280056664.9A patent/CN104395765B/en active Active
- 2012-02-09 WO PCT/CN2012/000158 patent/WO2013106962A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467220A (en) * | 2015-11-20 | 2016-04-06 | 国网山东省电力公司电力科学研究院 | Portable grounding resistance tester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104395765A (en) | 2015-03-04 |
| CN104395765B (en) | 2016-12-07 |
| WO2013106962A1 (en) | 2013-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202720256U (en) | Electronic circuit for high-precision closed-loop type hall current sensor | |
| CN103308075B (en) | Current output-type linear hall-effect sensor | |
| CN202433443U (en) | Electronic circuit for core-through type high-precision open-loop Hall current transducer | |
| Sheu et al. | A capacitance-ratio-modulated current front-end circuit with pulsewidth modulation output for a capacitive sensor interface | |
| CN203084068U (en) | Analog voltage acquisition circuit with isolation function | |
| CN103884867B (en) | The magnetic levitation centering system of a kind of three floating gyroaccelerometers | |
| CN103792982A (en) | Low dropout linear regulator without external capacitor | |
| CN108037341B (en) | Low leakage current reset device for capacitance integral weak current measurement circuit | |
| CN205786806U (en) | A kind of electronic circuit of closed-loop type Hall current sensor | |
| CN203630195U (en) | Giant magnetoresistance current sensor | |
| CN103354417A (en) | Constant-current control circuit with peak current compensation and switching power supply | |
| CN211905486U (en) | Low-cost electronic circuit for core-through closed-loop Hall current sensor | |
| CN109828242A (en) | A kind of transmitter Control protection system | |
| CN202583289U (en) | A single-power-supply electronic circuit used for a passing through high-precision closed loop Hall current sensor | |
| CN203643886U (en) | Band-gap reference source circuit and band-gap reference source | |
| CN202204616U (en) | Switching detection circuit using multiple PT100 thermistors as temperature sensors | |
| CN203965060U (en) | A kind of temperature sensor circuit based on reference source | |
| CN203745940U (en) | Low dropout linear voltage regulator without external capacitor | |
| CN211602212U (en) | Temperature detection system based on multiplexer | |
| CN104034938A (en) | Current detection circuit in electronic voltage transformer | |
| CN203929849U (en) | Current detection circuit in a kind of electronic type voltage transformer | |
| CN208937636U (en) | A kind of current detection circuit of no amplifier | |
| CN102706473B (en) | Temperature detecting circuit applied to radio frequency receiver | |
| CN207743876U (en) | A kind of amplitude limiter circuit of novel high-precision, quick response | |
| CN202453759U (en) | Bipolar reference voltage source device with driving function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing tuoken Electronic Technology Co., Ltd. Assignor: Zou Gaozhi Contract record no.: 2014320010090 Denomination of utility model: High-precision closed-loop electronic circuit for hall current sensor Granted publication date: 20130206 License type: Exclusive License Record date: 20140528 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130206 |
|
| CX01 | Expiry of patent term |