CN202305636U - High-overload Hall current sensor - Google Patents
High-overload Hall current sensor Download PDFInfo
- Publication number
- CN202305636U CN202305636U CN2011203946799U CN201120394679U CN202305636U CN 202305636 U CN202305636 U CN 202305636U CN 2011203946799 U CN2011203946799 U CN 2011203946799U CN 201120394679 U CN201120394679 U CN 201120394679U CN 202305636 U CN202305636 U CN 202305636U
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- microprocessor
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- current sensor
- hall element
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Abstract
The utility model discloses a high-overload Hall current sensor which comprises a ferromagnetic concentrating ring, a Hall element, an operational amplifier, an AD (analog-to-digital) chip, a microprocessor, a drive circuit and a secondary compensating coil, wherein the Hall element is arranged at a gap of the ferromagnetic concentrating ring, and the secondary compensating coil is wound around the ferromagnetic concentrating ring; a voltage signal output of the Hall element is sequentially connected with the operational amplifier, the AD chip and the microprocessor; and an output signal of the microprocessor is connected with the drive circuit, and an output of the drive circuit is connected with the secondary compensating coil.
Description
Technical field
The utility model belongs to the current sensor field, particularly can tolerate to exceed current-carrying current sensor.
Background technology
Hall current sensor is the device that utilizes the detection electric current that the Hall effect principle processes.It detects principle is to detect the magnetic field that tested electric current produces through Hall element, again through magnetoelectricity conversion output and tested linear electric signal, thereby reaches the purpose that detects electric current.Its outstanding characteristics are full isolation measurements, and promptly metering circuit needn't insert circuit-under-test and can realize current detecting, and they are coupled by magnetic field, and the input of testing circuit, output circuit are that electricity is isolated fully.In the testing process, the state of circuit-under-test is the influence of examined circuit not, and testing circuit does not receive the influence of seized circuit yet.
Usually Hall current sensor directly measurement and the magnetic balance dual modes of adopting detect more; When conventional Hall current sensor detected, overload current was merely the several times of rated current, in some particular application; In the power industry application; In case break down, possibly produce the situation of 10 times of rated current, general Hall current sensor can't bear and cause sensor to damage.Also need at aspects such as stability, low temperature drift, the linearities simultaneously to strengthen.
Summary of the invention
The purpose of the utility model is exactly to propose a kind of novel Hall current sensor, guaranteeing under the high situation of stability, low temperature drift, the linearity, solution in use, the situation of instantaneous large-current appears in tested electric current.The tested electric current of sensor stands under the situation of 10 times of rated current in short-term, and sensor does not damage, and after tested electric current recovered normally, sensor still can operate as normal.
The utility model technical scheme is: the high overload Hall current sensor; Comprise ring concentrator; Place Hall element, operational amplifier, AD chip, microprocessor, the driving circuit of ring concentrator breach; Be wound on the secondary compensation coil on the ring concentrator, the output of Hall element voltage signal connects operational amplifier, AD chip, microprocessor, driving circuit successively and is wound on the secondary compensation coil on the ring concentrator, and the output of Hall element voltage signal connects operational amplifier, AD chip and microprocessor successively; Microprocessor output signal connects driving circuit, and driving circuit output connects the secondary compensation coil again.Form the closed-loop measuring system.
The utility model adopts the magnetic balance type design concept; Be enclosed within lead to be measured and ring concentrator jaggy, after promptly magnet ring is assembled the magnetic field that primary current produced, act on Hall element; Make it that voltage signal output arranged; Be input to operational amplifier, after operational amplifier amplified, the output offset current was through the secondary compensation coil.The magnetic field that magnetic field that secondary coil produces and primary current produce is opposite, thereby has compensated magnetic field, former limit, and Hall output is reduced gradually; When former secondary magnetic equated, offset current no longer increased, and in dynamically, reached magnetic balance; Time Created is often in 1 μ s; Whole measurement loop forms closed-loop system, and this circuit is mainly by the magnetoelectricity conversion portion, and amplifier section and driving compensated line partly wait composition.Use closed loop (compensation) current sensor that Hall detects, have good stability, temperature is floated characteristics such as little, that the linearity is high, load capacity is strong.Can measure the electric current of interchange and various waveforms.They are coupled by magnetic field, and the input of testing circuit, output circuit are that electricity is isolated fully.In the testing process, the state of circuit-under-test is the influence of examined circuit not, and testing circuit does not receive the influence of seized circuit yet.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The high overload Hall current sensor consists of the following components, and the lead 1 of electric current to be measured, ring concentrator 2, components and parts unit 3 comprise operational amplifier, AD chip and microprocessor, Hall element H, driving circuit 4.
Can be provided with injection casing and pass through casting glue components and parts assembled unit and the integrated installation of driving circuit; Hall current sensor has signal amplifier module that the conversion of electromagnetic conversion, magnetoelectricity, operational amplifier constitute, also can be provided with functions such as signal adjustment, signal output; Tested electric current carries out the magnetoelectricity conversion through Hall element and through (pin) overcurrent pin, sensor is supplied power by primary pins in addition.The microprocessor control signal realizes the closed loop current measurement through amplifying the rear drive secondary coil to ring concentrator (being wound on the ring concentrator).
Adopted power supply position limitation protection technology,, the output of Hall element has been controlled in certain scope,, but still be limited in the tolerance range at output terminal even tested electric current reaches far above rated current to clamper after the working power process conversion of sensitive element.Like this, in case tested electric current recovers normally, sensor again can operate as normal.On core material, select the permalloy material for use; The principal feature of permalloy is to have very high magnetic capacity and very low coercive force, and under the situation of the big electric current of transient error, magnetic core also is not easy to export saturated; Help reducing the remanent magnetism of sensor, improve the precision of sensor.
Structural design scheme: use for convenient,, be designed to integral structure, with the synthetic integral body of above-mentioned plurality of units closed group, carry out embedding simultaneously, the composition module structure through injection casing from the miniaturization angle.
Claims (1)
1. high overload Hall current sensor; It is characterized in that comprising ring concentrator; Place Hall element, operational amplifier, AD chip, microprocessor, the driving circuit of ring concentrator breach and be wound on the secondary compensation coil on the ring concentrator, the output of Hall element voltage signal connects operational amplifier, AD chip and microprocessor successively; Microprocessor output signal connects driving circuit, and driving circuit output connects the secondary compensation coil again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946799U CN202305636U (en) | 2011-10-17 | 2011-10-17 | High-overload Hall current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203946799U CN202305636U (en) | 2011-10-17 | 2011-10-17 | High-overload Hall current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202305636U true CN202305636U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203946799U Expired - Lifetime CN202305636U (en) | 2011-10-17 | 2011-10-17 | High-overload Hall current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202305636U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616550A (en) * | 2013-11-29 | 2014-03-05 | 河北工业大学 | Giant magnetoresistance current sensor |
| CN105203824A (en) * | 2014-10-11 | 2015-12-30 | 徐州重型机械有限公司 | Proportional solenoid valve control signal detection method and apparatus, and performance test system |
| CN105699764A (en) * | 2016-03-21 | 2016-06-22 | 威胜集团有限公司 | Hall-sensor-based electric energy meter |
| CN105988034A (en) * | 2015-02-06 | 2016-10-05 | 广东易事特电源股份有限公司 | Current detection device |
| RU2650844C1 (en) * | 2017-05-29 | 2018-04-17 | Виктор Владимирович Моршнев | Digital transducer of current of compensatory type |
| CN105629047B (en) * | 2015-12-24 | 2018-06-22 | 中国船舶重工集团公司第七一〇研究所 | A kind of closed-loop current sensors |
| CN108562774A (en) * | 2018-06-21 | 2018-09-21 | 山东航天电子技术研究所 | A kind of micro metal shell collection magnetic-type Hall current sensor |
| CN109282927A (en) * | 2018-11-20 | 2019-01-29 | 广东盈动高科自动化有限公司 | A kind of axis torch measuring system and measurement method |
| CN116008634A (en) * | 2023-03-22 | 2023-04-25 | 南京中旭电子科技有限公司 | Data processing method and device suitable for Hall current sensor |
-
2011
- 2011-10-17 CN CN2011203946799U patent/CN202305636U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616550A (en) * | 2013-11-29 | 2014-03-05 | 河北工业大学 | Giant magnetoresistance current sensor |
| CN105203824A (en) * | 2014-10-11 | 2015-12-30 | 徐州重型机械有限公司 | Proportional solenoid valve control signal detection method and apparatus, and performance test system |
| CN105988034A (en) * | 2015-02-06 | 2016-10-05 | 广东易事特电源股份有限公司 | Current detection device |
| CN105629047B (en) * | 2015-12-24 | 2018-06-22 | 中国船舶重工集团公司第七一〇研究所 | A kind of closed-loop current sensors |
| CN105699764A (en) * | 2016-03-21 | 2016-06-22 | 威胜集团有限公司 | Hall-sensor-based electric energy meter |
| RU2650844C1 (en) * | 2017-05-29 | 2018-04-17 | Виктор Владимирович Моршнев | Digital transducer of current of compensatory type |
| CN108562774A (en) * | 2018-06-21 | 2018-09-21 | 山东航天电子技术研究所 | A kind of micro metal shell collection magnetic-type Hall current sensor |
| CN109282927A (en) * | 2018-11-20 | 2019-01-29 | 广东盈动高科自动化有限公司 | A kind of axis torch measuring system and measurement method |
| CN109282927B (en) * | 2018-11-20 | 2023-09-01 | 广东盈动高科自动化有限公司 | Shaft torque measurement system and measurement method |
| CN116008634A (en) * | 2023-03-22 | 2023-04-25 | 南京中旭电子科技有限公司 | Data processing method and device suitable for Hall current sensor |
| CN116008634B (en) * | 2023-03-22 | 2023-06-09 | 南京中旭电子科技有限公司 | Data processing method and device suitable for Hall current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
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| CX01 | Expiry of patent term |