CN203101477U - Hall closed-loop current sensor - Google Patents
Hall closed-loop current sensor Download PDFInfo
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- CN203101477U CN203101477U CN 201220731184 CN201220731184U CN203101477U CN 203101477 U CN203101477 U CN 203101477U CN 201220731184 CN201220731184 CN 201220731184 CN 201220731184 U CN201220731184 U CN 201220731184U CN 203101477 U CN203101477 U CN 203101477U
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Abstract
The utility model discloses a Hall closed-loop current sensor, which comprises a Hall element. The first input end of the Hall element is connected with one end of a resistor R2 through a resistor R1, and the other end of the resistor R2 is connected with the second input end of the Hall element. The first output end of the Hall element is connected with the negative input end of an operational amplifier IC through a resistor R5, and the second output end of the Hall element is connected with the positive input end of the operational amplifier IC through a resistor R6. The output end of the operational amplifier IC is connected with a power amplification circuit. The output of the power amplification circuit is fed back to the negative input end of the operational amplifier IC through a feedback circuit. The Hall closed-loop current sensor is characterized in that the first input end of the Hall element is connected with the cathode of a diode D3 through a resistor R3. The anode of the diode D3 is connected with a power supply. The first input end of the Hall element is connected with the anode of a diode D4 through a resistor R4 and the cathode of the diode D4 is connected with the power supply. The hall closed-loop current sensor has the advantages of high precision, good linearity, strong anti-interference ability and low noise.
Description
Technical field
The utility model relates to a kind of sensor, is specifically related to a kind of Hall closed loop current sensor.
Background technology
In recent years, after power semiconductor device of new generation entered electronic applications, ac variable frequency speed regulation, inverter and Switching Power Supply were day by day popularized, original voltage, current measuring element, the transmission and the detection of incompatibility medium-high frequency, high di/dt current waveform.Hall current sensor is the measurement Control current that grows up nearly decades, the commercial power quantity sensor of new generation of voltage, it is the high-performance electrical detecting element that remedies this vacancy, in order to install more easily and to detect, people's utility model Hall current sensor, but existing Hall current sensor ubiquity precision and the shortcoming that repeatable accuracy is low, poor linearity, antijamming capability weak, noise is big are difficult to be applicable to the demanding occasion of sensor.
The utility model content
For solving the deficiencies in the prior art, it is a kind of that the purpose of this utility model is to provide.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
A kind of Hall closed loop current sensor, comprise Hall element, the first input end of described Hall element connects an end of resistance R 2 by resistance R 1, the other end of resistance R 2 connects second input end of Hall element, first output terminal of Hall element is by the negative input end of resistance R 5 concatenation operation amplifier IC, second output terminal of Hall element is by the positive input terminal of resistance R 6 concatenation operation amplifier IC, the output terminal of operational amplifier IC connects power amplification circuit, the output of power amplification circuit feeds back to the negative input end of operational amplifier IC by the feedback end circuit, it is characterized in that, the first input end of described Hall element connects the negative pole of diode D3 by resistance R 3, the positive pole of diode D3 connects power supply, the first input end of Hall element is by the positive pole of resistance R 4 connection diode D4, and the negative pole of diode D4 connects power supply.
Aforesaid a kind of Hall closed loop current sensor is characterized in that, also comprises adjustable resistance R7, and an end of resistance R 1 connects an end of resistance R 2 and the end of adjustable resistance R7, the positive input terminal of the other end concatenation operation amplifier IC of adjustable resistance R7.
Aforesaid a kind of Hall closed loop current sensor is characterized in that, connects two reverse each other diode D1 and diode D2 between the first input end of described Hall element and second input end.
Aforesaid a kind of Hall closed loop current sensor is characterized in that, also comprises capacitor C 1, and an end of capacitor C 1 connects the positive pole of diode D3, and the other end of capacitor C 1 connects the negative pole of diode D4.
Aforesaid a kind of Hall closed loop current sensor, it is characterized in that, power amplification circuit comprises triode Q1, triode Q2, resistance R 8, resistance R 9, diode D5, diode D6, diode D7, diode D8, the collector of triode Q1 connects power supply, the base stage of triode Q1 connects the collector of triode Q1 by resistance R 8, the positive pole of diode D5 connects the base stage of triode Q1, the output terminal of the negative pole concatenation operation amplifier IC of diode D5 and the positive pole of diode D6, the negative pole of diode D6 connects the base stage of triode Q2, the base stage of triode Q2 connects the collector of triode Q2 by resistance R 9, the collector of triode Q2 connects power supply, the emitter of triode Q2 connects the emitter of triode Q1, the positive pole of diode D7 connects the emitter of triode Q1, the negative pole of diode D7 connects the collector of triode Q1, the positive pole of diode D8 connects the collector of triode Q2, and the negative pole of diode D8 connects the collector of triode Q2.
Aforesaid a kind of Hall closed loop current sensor is characterized in that the feedback end circuit comprises resistance R 10 and capacitor C 2, and resistance R 10 1 ends connect the negative pole of diode D8, and resistance R 10 other ends are by the negative input end of capacitor C 2 concatenation operation amplifier IC.
Aforesaid a kind of Hall closed loop current sensor is characterized in that, the negative lead circle L1 of diode D8.
Aforesaid a kind of Hall closed loop current sensor is characterized in that coil L1 is the ribbon core telefault.
Aforesaid a kind of Hall closed loop current sensor is characterized in that capacitor C 1 is a high frequency capacitance.
Usefulness of the present utility model is: a kind of Hall closed loop current sensor accuracy of the present utility model and repeatable accuracy height, the linearity is good, antijamming capability is strong, noise is little, has excellent popularization and is worth.
Description of drawings
Fig. 1 is preferred circuit theory diagrams of implementing of the present utility model.
The implication of Reference numeral among the figure:
1, power amplification circuit, 2, the feedback end circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done concrete introduction.
With reference to shown in Figure 1, a kind of Hall closed loop current of the utility model sensor, the first input end of Hall element connects an end of resistance R 2 by resistance R 1, the other end of resistance R 2 connects second input end of Hall element, first output terminal of Hall element is by the negative input end of resistance R 5 concatenation operation amplifier IC, second output terminal of Hall element is by the positive input terminal of resistance R 6 concatenation operation amplifier IC, the output terminal of operational amplifier IC connects power amplification circuit 1, the output of power amplification circuit 1 feeds back to the negative input end of operational amplifier IC by feedback end circuit 2, the first input end of Hall element connects the negative pole of diode D3 by resistance R 3, the positive pole of diode D3 connects power supply, the first input end of Hall element is by the positive pole of resistance R 4 connection diode D4, and the negative pole of diode D4 connects power supply.
As an improvement of the present utility model, a kind of Hall closed loop current sensor of the present utility model also comprises adjustable resistance R7, one end of resistance R 1 connects an end of resistance R 2 and the end of adjustable resistance R7, the positive input terminal of the other end concatenation operation amplifier IC of adjustable resistance R7.Adding adjustable resistance R7 can further guarantee the linearity, stability and the antijamming capability of Hall element input end.
Improve as of the present utility model another, connect two reverse each other diode D1 and diode D2 between the first input end of Hall closed loop current sensor and second input end.The effect of diode D1 and diode D2 is to protect Hall element not because overtension or high voltage pulse are damaged, and it also can be so that the stability characteristic (quality) of sensor improves.
In addition, in order to remove of the influence of power supply high frequency noise to sensor, the utility model can increase capacitor C 1, one end of capacitor C 1 connects the positive pole of diode D3, the other end of capacitor C 1 connects the negative pole of diode D4, capacitor C 1 can be eliminated the influence of power supply high frequency noise to sensor, thereby improves the precision and the repeatable accuracy of sensor.
The utility model is the concrete formation of power-limiting amplifying circuit 1, feedback end circuit 2 not, and it can be selected according to prior art, but as preferred, and power amplification circuit 1 of the present utility model, feedback end circuit 2 can be as shown in Figure 1.In the power amplification circuit 1 as Fig. 1, the collector of triode Q1 connects power supply, the base stage of triode Q1 connects the collector of triode Q1 by resistance R 8, the positive pole of diode D5 connects the base stage of triode Q1, the output terminal of the negative pole concatenation operation amplifier IC of diode D5 and the positive pole of diode D6, the negative pole of diode D6 connects the base stage of triode Q2, the base stage of triode Q2 connects the collector of triode Q2 by resistance R 9, the collector of triode Q2 connects power supply, the emitter of triode Q2 connects the emitter of triode Q1, the positive pole of diode D7 connects the emitter of triode Q1, the negative pole of diode D7 connects the collector of triode Q1, the positive pole of diode D8 connects the collector of triode Q2, and the negative pole of diode D8 connects the collector of triode Q2.Feedback end circuit 2 as Fig. 1 comprises resistance R 10 and capacitor C 2, and resistance R 10 1 ends connect the negative pole of diode D8, and resistance R 10 other ends are by the negative input end of capacitor C 2 concatenation operation amplifier IC.
In the above-mentioned power amplification circuit 1, the surge current that diode D7 and diode D8 can produce the utility model Hall closed loop current sensor internal is effectively protected, and promotes antijamming capability, makes that triode Q1, triode Q2 are not easily damaged.Further, the negative lead circle L1 of diode D8, coil L1 can be preferably the ribbon core telefault, the signal that coil L1 arrives in output the utility model sensor acquisition.As preferably, the utility model capacitor C 1 is a high frequency capacitance, with the influence of more effective elimination power supply high frequency noise to sensor.In addition, the utility model has adopted single operational amplifier IC, and this mainly is a temperature characterisitic of having considered the utility model product.
A kind of Hall closed loop current sensor accuracy of the present utility model and repeatable accuracy height, the linearity is good, antijamming capability is strong, noise is little, has excellent popularization and is worth.
More than show and described ultimate principle of the present utility model, principal character and advantage.The technician of the industry should understand, and the foregoing description does not limit the utility model in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop in the protection domain of the present utility model.
Claims (9)
1. Hall closed loop current sensor, comprise Hall element, the first input end of described Hall element connects an end of resistance R 2 by resistance R 1, the other end of resistance R 2 connects second input end of Hall element, first output terminal of Hall element is by the negative input end of resistance R 5 concatenation operation amplifier IC, second output terminal of Hall element is by the positive input terminal of resistance R 6 concatenation operation amplifier IC, the output terminal of operational amplifier IC connects power amplification circuit, the output of power amplification circuit feeds back to the negative input end of operational amplifier IC by the feedback end circuit, it is characterized in that, the first input end of described Hall element connects the negative pole of diode D3 by resistance R 3, the positive pole of diode D3 connects power supply, the first input end of Hall element is by the positive pole of resistance R 4 connection diode D4, and the negative pole of diode D4 connects power supply.
2. a kind of Hall closed loop current sensor according to claim 1, it is characterized in that, also comprise adjustable resistance R7, an end of resistance R 1 connects an end of resistance R 2 and the end of adjustable resistance R7, the positive input terminal of the other end concatenation operation amplifier IC of adjustable resistance R7.
3. a kind of Hall closed loop current sensor according to claim 2 is characterized in that, connects two reverse each other diode D1 and diode D2 between the first input end of described Hall element and second input end.
4. a kind of Hall closed loop current sensor according to claim 3 is characterized in that, also comprises capacitor C 1, and an end of capacitor C 1 connects the positive pole of diode D3, and the other end of capacitor C 1 connects the negative pole of diode D4.
5. a kind of Hall closed loop current sensor according to claim 5, it is characterized in that, power amplification circuit comprises triode Q1, triode Q2, resistance R 8, resistance R 9, diode D5, diode D6, diode D7, diode D8, the collector of triode Q1 connects power supply, the base stage of triode Q1 connects the collector of triode Q1 by resistance R 8, the positive pole of diode D5 connects the base stage of triode Q1, the output terminal of the negative pole concatenation operation amplifier IC of diode D5 and the positive pole of diode D6, the negative pole of diode D6 connects the base stage of triode Q2, the base stage of triode Q2 connects the collector of triode Q2 by resistance R 9, the collector of triode Q2 connects power supply, the emitter of triode Q2 connects the emitter of triode Q1, the positive pole of diode D7 connects the emitter of triode Q1, the negative pole of diode D7 connects the collector of triode Q1, the positive pole of diode D8 connects the collector of triode Q2, and the negative pole of diode D8 connects the collector of triode Q2.
6. a kind of Hall closed loop current sensor according to claim 6, it is characterized in that, the feedback end circuit comprises resistance R 10 and capacitor C 2, and resistance R 10 1 ends connect the negative pole of diode D8, and resistance R 10 other ends are by the negative input end of capacitor C 2 concatenation operation amplifier IC.
7. a kind of Hall closed loop current sensor according to claim 7 is characterized in that, the negative lead circle L1 of diode D8.
8. according to each described a kind of Hall closed loop current sensor of claim 1 to 8, it is characterized in that coil L1 is the ribbon core telefault.
9. according to each described a kind of Hall closed loop current sensor of claim 1 to 8, it is characterized in that capacitor C 1 is a high frequency capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731184 CN203101477U (en) | 2012-12-27 | 2012-12-27 | Hall closed-loop current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731184 CN203101477U (en) | 2012-12-27 | 2012-12-27 | Hall closed-loop current sensor |
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| CN203101477U true CN203101477U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220731184 Expired - Fee Related CN203101477U (en) | 2012-12-27 | 2012-12-27 | Hall closed-loop current sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345204A (en) * | 2013-08-07 | 2015-02-11 | 德州仪器德国股份有限公司 | Hybrid closed-loop/open-loop magnetic current sensor |
| CN109188055A (en) * | 2018-09-29 | 2019-01-11 | 江苏微能电子科技有限公司 | A kind of voltage sensor modular circuit based on 80CXX type single-chip microcontroller |
| CN109307794A (en) * | 2018-09-26 | 2019-02-05 | 江苏史利姆智能测控技术有限公司 | A kind of detection circuit for high-power charging equipment |
| CN109374946A (en) * | 2018-09-26 | 2019-02-22 | 江苏史利姆智能测控技术有限公司 | A kind of detection sensor for high-power charging equipment |
| CN112816756A (en) * | 2021-01-06 | 2021-05-18 | 四川众航电子科技有限公司 | Hall sensor device for measuring alternating current |
| CN112838575A (en) * | 2021-01-07 | 2021-05-25 | 四川众航电子科技有限公司 | Temperature compensation Hall sensor device |
-
2012
- 2012-12-27 CN CN 201220731184 patent/CN203101477U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345204A (en) * | 2013-08-07 | 2015-02-11 | 德州仪器德国股份有限公司 | Hybrid closed-loop/open-loop magnetic current sensor |
| CN104345204B (en) * | 2013-08-07 | 2019-03-19 | 德州仪器德国股份有限公司 | Mixed and closed-loop/open loop magnetic current sensors |
| CN109307794A (en) * | 2018-09-26 | 2019-02-05 | 江苏史利姆智能测控技术有限公司 | A kind of detection circuit for high-power charging equipment |
| CN109374946A (en) * | 2018-09-26 | 2019-02-22 | 江苏史利姆智能测控技术有限公司 | A kind of detection sensor for high-power charging equipment |
| CN109188055A (en) * | 2018-09-29 | 2019-01-11 | 江苏微能电子科技有限公司 | A kind of voltage sensor modular circuit based on 80CXX type single-chip microcontroller |
| CN112816756A (en) * | 2021-01-06 | 2021-05-18 | 四川众航电子科技有限公司 | Hall sensor device for measuring alternating current |
| CN112838575A (en) * | 2021-01-07 | 2021-05-25 | 四川众航电子科技有限公司 | Temperature compensation Hall sensor device |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 210046, No. 108 East, Gan Jia, Qixia District, Jiangsu, Nanjing Patentee after: JIANGSU CAMELLIA ELECTRIC CO., LTD. Address before: 3, 5, building 108, 210046 East, Gan family, Qixia District, Nanjing, Jiangsu Patentee before: Camellia Electric Co., Ltd. Jiangsu |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20161227 |