CN202421320U - Temperature compensator for Hall detection current sensor - Google Patents
Temperature compensator for Hall detection current sensor Download PDFInfo
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- CN202421320U CN202421320U CN2011205390886U CN201120539088U CN202421320U CN 202421320 U CN202421320 U CN 202421320U CN 2011205390886 U CN2011205390886 U CN 2011205390886U CN 201120539088 U CN201120539088 U CN 201120539088U CN 202421320 U CN202421320 U CN 202421320U
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- hall element
- hall
- current sensor
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- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The utility model relates to a temperature compensator for a Hall detection current sensor, which comprises a voltage stabilized source, a constant-current source with a Hall element H and a diode D, wherein the diode D is arranged in the same environment with the Hall element H and is serially connected between the voltage stabilized source and the constant-current source. The voltage stabilized source is connected with a positive electrode of the diode D, and the constant-current source is connected with a negative electrode of the diode D. The temperature compensator for the Hall detection current sensor solves the problem that measuring errors of the Hall detection current sensor are affected by temperature variation of the environment, guarantees the fact that a range of accuracy affected by temperature variation when the Hall detection current sensor detects primary current is within a calibrated measuring error range, can meet service requirements and is fine in practical effect.
Description
Technical field
The utility model relates to a kind of temperature compensator of Hall direct measuring type dc high-current sensor.
Background technology
In the prior art, the detection principle and the manufacturing process of Hall direct measuring type dc high-current sensor are mature on the whole, but sensor is never solved owing to the variation that receives environment temperature influences the measurement accuracy at all.In the prior art, adopt temperature changing trend single-point to compensate usually to the Hall element in the air gap.Because of there is certain limitation in this technology; Receive factor affecting such as environment temperature, day and night temperature, the season temperature difference unavoidably; Certainly will cause measuring-signal bigger deviation of reading to occur with temperature variation; Cause the measured electric current indicating value correspondence real current that a time bus produced of sensor inaccurate and unstable, influence the measuring accuracy of sensor.
The utility model content
The deficiency that the utility model exists to prior art just provides a kind of Hall to detect the temperature compensator of current sensor.
The utility model adopts following technological means to solve the problems of the technologies described above: a kind of Hall detects the temperature compensator of current sensor; Comprise source of stable pressure, have the constant current source of Hall element H and be in the diode D of equivalent environment with Hall element H; Said constant current source comprises operational amplifier IC, Hall element H, rheostat W; The negative electrode of diode D links to each other with the in-phase input end of operational amplifier IC; The inverting input of operational amplifier IC links to each other with the adjustable end of rheostat W, the output termination Hall element H of operational amplifier IC; Said rheostat W one end ground connection, another termination Hall element H; Two output termination Hall element H of said constant current source; Series diode D between said source of stable pressure and the constant current source, source of stable pressure links to each other with diode D anode, and constant current source links to each other with diode D negative electrode.
Said source of stable pressure comprises resistance R, diode Z, electrochemical capacitor C, and parallel with one another by resistance R, diode Z, electrochemical capacitor C, and diode Z links to each other with the anode of electrochemical capacitor C, and ground connection.
The beneficial effect of the utility model is: the utility model has solved that Hall detects that current sensor receives variation of ambient temperature and the problem that influences measuring error; Guarantee that Hall detects that the current sensor senses primary current receives temperature variation and the scope that influences accuracy in the measuring error scope of being demarcated; Can satisfy request for utilization, actual effect is good.
Description of drawings
Fig. 1 is the temperature compensator circuit diagram that the described Hall of the utility model detects current sensor.
Embodiment
To combine concrete embodiment that the content of the utility model is described below.
As shown in Figure 1, the described temperature compensator of present embodiment comprises: source of stable pressure, constant current source and diode D, and series diode D between source of stable pressure and the constant current source, source of stable pressure links to each other with diode D anode, and constant current source links to each other with diode D negative electrode.
Diode D places the identical environment of Hall element H, utilizes diode D to receive temperature variation characteristic to change the variation of constant current source voltage drive electric current and receives temperature variation characteristic complementary mutually with Hall element H, makes Hall element H output not receive influence of temperature change.
Source of stable pressure comprises resistance R, diode Z, electrochemical capacitor C, and parallel with one another by resistance R, diode Z, electrochemical capacitor C, and diode Z links to each other with the anode of electrochemical capacitor C, and ground connection.
Constant current source comprises operational amplifier IC, Hall element H, rheostat W.The negative electrode of diode D links to each other with the in-phase input end of operational amplifier IC, and the inverting input of operational amplifier IC links to each other with the adjustable end of rheostat W, the output termination Hall element H of operational amplifier IC.Rheostat W one end ground connection, another termination Hall element H.Two output termination Hall element H of constant current source.
Source of stable pressure provides high-precision burning voltage, converts constant current drive Hall element H to through operational amplifier IC combined circuit, and the variation of diode Z voltage causes the constant current source change in current in the source of stable pressure.Source of stable pressure arrives constant current source through diode D pressure drop.The temperature compensation of Hall element H utilizes the temperature characterisitic of diode D; Hall element H is symmetrically distributed in the air gap of sensor iron core; When Hall element H receives influencing of environment temperature; The constant current source of excitation Hall element H electric current carries out linear compensation, and the temperature of sensor internal reaches balance, thereby has avoided the accuracy of measurement temperature influence of variation of ambient temperature to sensor.
Claims (2)
1. a Hall detects the temperature compensator of current sensor; Comprise source of stable pressure, have the constant current source of Hall element H and be in the diode D of equivalent environment with Hall element H; Said constant current source comprises operational amplifier IC, Hall element H, rheostat W; The negative electrode of diode D links to each other with the in-phase input end of operational amplifier IC, and the inverting input of operational amplifier IC links to each other with the adjustable end of rheostat W, the output termination Hall element H of operational amplifier IC; Said rheostat W one end ground connection, another termination Hall element H; Two output termination Hall element H of said constant current source is characterized in that, series diode D between said source of stable pressure and the constant current source, and source of stable pressure links to each other with diode D anode, and constant current source links to each other with diode D negative electrode.
2. a kind of Hall as claimed in claim 1 detects the temperature compensator of current sensor; It is characterized in that; Said source of stable pressure comprises resistance R, diode Z, electrochemical capacitor C; And parallel with one another by resistance R, diode Z, electrochemical capacitor C, diode Z links to each other with the anode of electrochemical capacitor C, and ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205390886U CN202421320U (en) | 2011-12-21 | 2011-12-21 | Temperature compensator for Hall detection current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205390886U CN202421320U (en) | 2011-12-21 | 2011-12-21 | Temperature compensator for Hall detection current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421320U true CN202421320U (en) | 2012-09-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205390886U Expired - Fee Related CN202421320U (en) | 2011-12-21 | 2011-12-21 | Temperature compensator for Hall detection current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421320U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435833A (en) * | 2011-12-21 | 2012-05-02 | 铜陵浩岩节能科技有限公司 | Temperature compensator of Hall detection current sensor |
| CN105651157A (en) * | 2016-02-18 | 2016-06-08 | 南京中旭电子科技有限公司 | Setting method of Hall linear stroke indicator |
-
2011
- 2011-12-21 CN CN2011205390886U patent/CN202421320U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435833A (en) * | 2011-12-21 | 2012-05-02 | 铜陵浩岩节能科技有限公司 | Temperature compensator of Hall detection current sensor |
| CN105651157A (en) * | 2016-02-18 | 2016-06-08 | 南京中旭电子科技有限公司 | Setting method of Hall linear stroke indicator |
| CN105651157B (en) * | 2016-02-18 | 2018-07-20 | 南京中旭电子科技有限公司 | A kind of setting method of Hall linear travel height indicator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20131221 |