CN205080181U - High temperature resistant hall current sensor - Google Patents
High temperature resistant hall current sensor Download PDFInfo
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- CN205080181U CN205080181U CN201520881253.4U CN201520881253U CN205080181U CN 205080181 U CN205080181 U CN 205080181U CN 201520881253 U CN201520881253 U CN 201520881253U CN 205080181 U CN205080181 U CN 205080181U
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- amplifier circuit
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Abstract
The utility model provides a high temperature resistant hall current sensor, includes current collection magnetic ring and hall element and amplifier circuit, and the current collection magnetic ring is hugged closely with hall element, and hall element's amplifier circuit adopts constant current source amplifier circuit, and hall element is two hall sensor, and two hall sensor establish ties respectively in the constant current source that an emitter follower circuit constitutes, two hall sensor's output weak electric signal meets differential amplifier circuit, and differential amplifier circuit connects see -saw circuit output.
Description
One. technical field
The utility model relates to a kind of high temperature resistant type Hall current sensor, is a kind of magneto-dependent sensor utilizing Hall effect principle, in particular for the current detection sensor used in hot environment.
Two. background technology
Hall current sensor is the device of the detection electric current utilizing Hall effect principle to make.Its outstanding feature is the output can measured at electric isolution is voltage signal or current signal, and precision is high, and power consumption is little, sound construction, volume is little, lightweight, and the life-span is long, easy for installation, response frequency is high, vibration resistance, is not afraid of dust, greasy dirt, steam and salt fog etc. and pollutes or corrosion.Its principle of work utilizes ring concentrator to get up to be supplied to Hall element by the magnetic field concentration produced around electrified wire, then be converted to light current model by Hall element, amplifies output voltage signal through amplifier.Be suitable for measuring direct current to few kilohertz electric current, frequency range is narrower, but line form is simple, and stable performance, reliability is high." without current potential " that this sensor can realize electric current detects, and namely metering circuit need not access circuit-under-test and can realize current detecting, and they are coupled by magnetic field, and the input of testing circuit, output circuit are complete electric isolution.In testing process, the impact of the not examined circuit of state of circuit-under-test, testing circuit is not also by the impact of tested circuit.
Three. utility model content
The utility model object is, proposes a kind of high temperature resistant and withstand voltage Hall current sensor, in order to solve at height withstand voltage (6000V, AC/50H
z), high-temperature (100 DEG C+5 DEG C) when carry out Super-Current Measurement (electric current 1500A can be measured), and sensor performance is normal, and shell is indeformable; Overload (± 2000A) is not damaged, and function is normally developed.
The technical solution of the utility model is, a kind of high temperature resistant Hall current sensor, comprise current collection magnet ring and Hall element and amplifying circuit, current collection magnet ring and Hall element are close to, the amplifying circuit of Hall element adopts constant current source amplifying circuit, Hall element is two Hall elements, and two Hall elements are connected in the constant current source of an emitter follower circuit formation respectively; The output weak electric signal of two Hall elements connects differential amplifier circuit, and differential amplifier circuit connects see-saw circuit and exports.The magnetic field concentration produced around energising copper bar gets up to be supplied to Hall element by current collection magnet ring.
The beneficial effects of the utility model: the utility model is suitable for measuring direct current to few kilohertz electric current, and frequency band is narrower, and line form is simple, and stable performance, reliability is high.According to user's requirement, measurement electric current is 1500A, shell can dismantle and window size larger, what measuring circuit adopted two Hall circuit opens annular design, and linear requirements measures 0 ~ 2000A, so do not take amplitude limit measure at output terminal, according to Design calcu-lation, this scheme can meet user's requirement.
Four, accompanying drawing explanation
Fig. 1 is the utility model circuit diagram;
Fig. 2 is constant-current source circuit schematic diagram in the utility model Fig. 1.
Five, embodiment
As shown in the figure, in Fig. 1 HDC-1500KJ type is high temperature resistant Hall current sensor, principle scheme is as Fig. 1; The utility model adopts the current sensor of Hall direct amplifier system circuit; Comprise current collection magnet ring and Hall element, utilize current collection magnet ring to get up to be supplied to Hall element by the magnetic field concentration produced around energising copper bar; Be converted to weak electric signal by Hall element, then add delayed frequency compensation by A1 differential amplification; Part III is that the anti-phase amplification of A2 adds zeroing and advanced frequency compensation; Be suitable for measuring direct current to few kilohertz electric current, frequency band is narrower, and line form is simple, and stable performance, reliability is high.Fig. 2 is constant-current circuit schematic diagram in the utility model Fig. 1.
According to user's requirement, measurement electric current is 1500A, shell can dismantle and window size larger, what measuring circuit adopted two Hall circuit opens annular design, and linear requirements measures 0 ~ 2000A, so do not take amplitude limit measure at output terminal, according to Design calcu-lation, this scheme can meet user's requirement.
In the event of high temperatures, the temperature drift of the factor affecting sensor accuracy mainly sensor.The influence factor of Hall current sensor temperature drift is mainly reflected in again in the temperature drift of Hall element, be connected in the constant current source that an emitter follower circuit (constant-current source circuit) forms respectively by two Hall elements, Hall element is weak electric signal at emitter follower circuit converts magnetic field signal, then is amplified by differential amplifier circuit A1.Emitter follower circuit is powered to Hall element i.e. two Hall circuit H, can ensure in hot environment, effectively controls the temperature drift of Hall element.
On sheathing material is selected, because product environment for use is long-time hot environment (100 DEG C), conventional plastic material in high temperature environments, is easily out of shape and is not easy processing, contaminated environment etc.Therefore selected PBS environmentally-friendly plastic.These plastics belong to thermoplasticity biological degradation plastics, are a kind of novel plastics, and it processes with the polyester of butylene glycol and succinic acid synthesis.Compared with other separates plastics, PBS mechanical property is very excellent, close to PP and ABS plastic; Heat resistance is good, and heat distortion temperature is more than 100 DEG C, and modified serviceability temperature, close to 100 DEG C, overcomes the shortcoming that other biodegradable plastic heat resisting temperature is low; Processing characteristics is good, and can carry out all kinds of processing and forming on existing plastic processing common apparatus, be that current degradative plastics processing characteristics is best, in normal storage and use procedure, performance is highly stable.
Claims (1)
1. a high temperature resistant Hall current sensor, it is characterized in that comprising current collection magnet ring and Hall element and amplifying circuit, current collection magnet ring and Hall element are close to, the amplifying circuit of Hall element adopts constant current source amplifying circuit, Hall element is two Hall elements, and two Hall elements are connected in the constant current source of an emitter follower circuit formation respectively; The output weak electric signal of two Hall elements connects differential amplifier circuit, and differential amplifier circuit connects see-saw circuit and exports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520881253.4U CN205080181U (en) | 2015-11-06 | 2015-11-06 | High temperature resistant hall current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520881253.4U CN205080181U (en) | 2015-11-06 | 2015-11-06 | High temperature resistant hall current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205080181U true CN205080181U (en) | 2016-03-09 |
Family
ID=55432580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520881253.4U Active CN205080181U (en) | 2015-11-06 | 2015-11-06 | High temperature resistant hall current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205080181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444513A (en) * | 2018-12-05 | 2019-03-08 | 三峡大学 | A kind of bimag Low Drift Temperature Hall current sensor |
| CN109521250A (en) * | 2018-11-19 | 2019-03-26 | 武汉科功科技有限公司 | A kind of more protection high precision electric current transducers |
-
2015
- 2015-11-06 CN CN201520881253.4U patent/CN205080181U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521250A (en) * | 2018-11-19 | 2019-03-26 | 武汉科功科技有限公司 | A kind of more protection high precision electric current transducers |
| CN109444513A (en) * | 2018-12-05 | 2019-03-08 | 三峡大学 | A kind of bimag Low Drift Temperature Hall current sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |