CN208109917U - A kind of unshielded anti-interference current sensor - Google Patents
A kind of unshielded anti-interference current sensor Download PDFInfo
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- CN208109917U CN208109917U CN201820329326.2U CN201820329326U CN208109917U CN 208109917 U CN208109917 U CN 208109917U CN 201820329326 U CN201820329326 U CN 201820329326U CN 208109917 U CN208109917 U CN 208109917U
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- hall chip
- current
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- corner part
- carrying conductor
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Abstract
A kind of unshielded anti-interference current sensor disclosed by the utility model, current-carrying conductor including being in serpentine, first Hall chip and the second Hall chip, current-carrying conductor has the first corner part and the second corner part, first Hall chip is set to the inside of current-carrying conductor, the center sensitive spot of first Hall chip is in be correspondingly arranged with the first corner part, second Hall chip is connected in parallel with the first Hall chip, second Hall chip is set to the outside of current-carrying conductor, and second Hall chip and the first Hall chip it is oppositely arranged each other, the center sensitive spot of second Hall chip is in be correspondingly arranged with the second corner part.The utility model is simple and reasonable, easy for installation, and manufacturing cost is lower, and anti-interference ability is stronger.
Description
Technical field
The utility model relates to current sensing techniques field, in particular to a kind of unshielded anti-interference current sensor.
Background technique
Hall current sensor refers to based on Hall direct amplifier system working principle, i.e., when primary current Ip flows through a root long conducting wire
When, a magnetic field is generated around conducting wire, the size in this magnetic field is directly proportional to the electric current for flowing through conducting wire, and the magnetic field of generation is gathered in
In magnet ring, output is measured and amplified by hall device in magnet ring air gap, and output voltage Vs accurately reflects primary side electricity
Flow Ip and the processing by special circuit, the detecting element for primary current variation.Hall current sensor is widely used in
Frequency converter, inverter, ups power, inverter type welder, electrolysis plating, numerically-controlled machine tool, microcomputer detecting system, power grid prison
Control system and the every field for needing isolation detection Current Voltage.
Hall chip is the important composition component of Hall current sensor, can be converted into magnetic field directly proportional to electric current
Voltage.But since Hall chip is easy the interference by ambient stray field, so that Hall chip output voltage may go out
It is existing bigger than normal or less than normal, influence the measurement accuracy of sensor.Thus, Hall current sensor in the prior art in the prevalence of
The problem of poor anti jamming capability.
Currently, relatively conventional technological means is to add magnetic core, stray magnetic field is shielded around Hall chip using magnetic core
Shunting is covered, improves the interference free performance of Hall current sensor whereby.But after using magnetic core, and cause Hall current biography
Sensor haves the defects that installation is inconvenient, manufacturing cost is high.
Utility model content
The purpose of this utility model is that it is in view of the drawbacks of the prior art and insufficient, a kind of unshielded anti-interference current is provided
Sensor, simple and reasonable, easy for installation, manufacturing cost is lower, and anti-interference ability is stronger.
To achieve the above object, the utility model uses following technical scheme.
A kind of unshielded anti-interference current sensor, including：
One is in the current-carrying conductor of serpentine, and the current-carrying conductor has the first corner part and the second corner part, and in electric current stream
When through the current-carrying conductor, first corner part is opposite with the magnetic direction of second corner part；
One first Hall chip, first Hall chip are set to the inside of the current-carrying conductor, first Hall
The center sensitive spot of chip is in be correspondingly arranged with first corner part, when electric current flows through the current-carrying conductor, described first
The magnetic field that corner part generates passes perpendicularly through first Hall chip by the center sensitive spot of first Hall chip；
One second Hall chip, second Hall chip are connected in parallel with first Hall chip, and described second suddenly
Your chip is set to the outside of the current-carrying conductor, and second Hall chip is reversely set each other with first Hall chip
It sets, the center sensitive spot of second Hall chip, in being correspondingly arranged, flows through the current-carrying in electric current with second corner part
When conductor, the magnetic field that second corner part generates passes perpendicularly through described second by the center sensitive spot of second Hall chip
Hall chip.
A kind of unshielded anti-interference current sensor, including several Hall detection modules, each Hall detect mould
Block include one be in serpentine current-carrying conductor, one first Hall chip and one second Hall chip, each current-carrying conductor according to
Secondary series connection is constituted described in any two between the first Hall chip and/or second Hall chip and is connected in parallel；
The current-carrying conductor has the first corner part and the second corner part, and when electric current flows through the current-carrying conductor, together
First corner part of one current-carrying conductor is opposite with the magnetic direction of second corner part；
In each Hall detection module, first Hall chip is set to the inside of the corresponding current-carrying conductor,
The center sensitive spot of first Hall chip, in being correspondingly arranged, flows through the load in electric current with corresponding first corner part
When current conductor, the magnetic field that first corner part generates passes perpendicularly through institute by the center sensitive spot of corresponding first Hall chip
State the first Hall chip；
In each Hall detection module, second Hall chip is set to the outside of the corresponding current-carrying conductor,
And second Hall chip and corresponding first Hall chip are oppositely arranged each other, the center of second Hall chip is quick
Sense point is with corresponding second corner part in being correspondingly arranged, and when electric current flows through the current-carrying conductor, second corner part is produced
Raw magnetic field passes perpendicularly through second Hall chip by the center sensitive spot of corresponding second Hall chip.
The beneficial effects of the utility model are：Unshielded anti-interference current sensor provided by the utility model, by adopting
With the current-carrying conductor for being in serpentine, make current-carrying conductor that there is the first corner part and the second corner part, and is set on the inside of current-carrying conductor
Set the first Hall chip, the second Hall chip be set in the outside of current-carrying conductor, make the center sensitive spot of the first Hall chip with
First corner part is in being correspondingly arranged, and the center sensitive spot of the second Hall chip is in be correspondingly arranged with the second corner part, so that this reality
It can still be had strong anti-interference ability with novel in the case where being not necessarily to and configuring magnetic core, simple and reasonable, installation side
Just, manufacturing cost is lower.
Detailed description of the invention
Fig. 1 is the overall structure diagram under a kind of implementation state of the utility model.
Fig. 2 is the overall structure diagram under the utility model another kind implementation state.
In Fig. 1-2：1, current-carrying conductor；11, the first corner part；12, the second corner part；2, the first Hall chip；3, second
Hall chip.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings.
Embodiment one, the present embodiment are mainly used for carrying out low current detection.
As shown in Figure 1, a kind of unshielded anti-interference current sensor, including：One is in the current-carrying conductor 1 of serpentine, and current-carrying is led
Body 1 has the first corner part 11 and the second corner part 12, and when electric current flows through current-carrying conductor 1, the first corner part 11 and second
The magnetic direction of corner part 12 is opposite；One first Hall chip 2, the first Hall chip 2 are set to the inside of current-carrying conductor 1, the
The center sensitive spot of one Hall chip 2 is with the first corner part 11 in being correspondingly arranged, and when electric current flows through current-carrying conductor 1, first is turned
The magnetic field that corner 11 generates passes perpendicularly through the first Hall chip 2 by the center sensitive spot of the first Hall chip 2；One second Hall core
Piece 3, the second Hall chip 3 are connected in parallel with the first Hall chip 2, and the second Hall chip 3 is set to the outside of current-carrying conductor 1,
And second Hall chip 3 and the first Hall chip 2 it is oppositely arranged each other, the center sensitive spot of the second Hall chip 3 is turned with second
Corner 12 is in being correspondingly arranged, and when electric current flows through current-carrying conductor 1, the magnetic field that the second corner part 12 generates is by the second Hall chip 3
Center sensitive spot pass perpendicularly through the second Hall chip 3.
As shown in Figure 1, when thering is electric current to flow according to solid arrow direction in current-carrying conductor 1, according to Ampere's law, current-carrying
Conductor 1 will generate magnetic field shown in hollow arrow in Fig. 1 in the first corner part 11 and the second corner part 12（It needs to illustrate
It is that, when the current direction for flowing through current-carrying conductor 1 is opposite, correspondingly, magnetic direction is also opposite）, the center of the first Hall chip 2
Sensitive spot, the second Hall chip 3 center sensitive spot sense behind corresponding magnetic field can output voltage, the stool and urine of the voltage with
The electric current direct proportionality in current-carrying conductor 1 is flowed through, at this time the output voltage V of current sensorOUTCalculation formula it is as follows：
VOUT=（V1+V2）/ 2, wherein V1For the output voltage of the first Hall chip 2, V2For the output of the second Hall chip 3
Voltage.
If magnetic direction suffered by the first Hall chip 2 in ambient stray field direction and Fig. 1（That is at the first corner part 11
Hollow arrow direction）When consistent, the actual output voltage of the first Hall chip 2 increases at this time, and the reality of the second Hall chip 3 is defeated
Voltage reduces out, at this time the output voltage V of current sensorOUTCalculation formula it is as follows：
VOUT={（V1+VZ）+（V2-VZ）}/2, wherein VZFor the influence voltage of ambient stray field, which simplifies
After can obtain：VOUT=（V1+V2）/2.
If magnetic direction suffered by the second Hall chip 3 in ambient stray field direction and Fig. 1（That is at the second corner part 12
Hollow arrow direction）When consistent, the actual output voltage of the first Hall chip 2 reduces at this time, and the reality of the second Hall chip 3 is defeated
Voltage increases out, at this time the output voltage V of current sensorOUTCalculation formula it is as follows：
VOUT={（V1-VZ）+（V2+VZ）}/2, the calculation formula can obtain after simplifying：VOUT=（V1+V2）/2.
Can be seen that no matter how ambient stray field direction changes by the above calculation formula, the utility model is mentioned
The output voltage V of the current sensor of confessionOUTIt is unaffected namely current sensor provided by the utility model has
Stronger anti-interference ability.
Embodiment two, the present embodiment are mainly used for carrying out checking of great current.
As shown in Fig. 2, a kind of unshielded anti-interference current sensor, including several Hall detection modules, each Hall
Detection module include one be in serpentine current-carrying conductor 1, one first Hall chip 2 and one second Hall chip 3, each current-carrying
Conductor 1 is sequentially connected in series, and is constituted and is connected in parallel between any two the first Hall chip 2 and/or the second Hall chip 3.
Current-carrying conductor 1 has the first corner part 11 and the second corner part 12, and when electric current flows through current-carrying conductor 1, same
First corner part 11 of a current-carrying conductor 1 is opposite with the magnetic direction of the second corner part 12.
In each Hall detection module, the first Hall chip 2 is set to the inside of corresponding current-carrying conductor 1, the first Hall core
The center sensitive spot of piece 2 is in be correspondingly arranged with corresponding first corner part 11, when electric current flows through current-carrying conductor 1, the first turning
The magnetic field that portion 11 generates passes perpendicularly through the first Hall chip 2 by the center sensitive spot of corresponding first Hall chip 2.
In each Hall detection module, the second Hall chip 3 is set to the outside of corresponding current-carrying conductor 1, and the second Hall
Chip 3 and corresponding first Hall chip 2 are oppositely arranged each other, the center sensitive spot of the second Hall chip 3 and corresponding second turning
Portion 12 is in being correspondingly arranged, and when electric current flows through current-carrying conductor 1, the magnetic field that the second corner part 12 generates is by corresponding second Hall chip
3 center sensitive spot passes perpendicularly through the second Hall chip 3.
The working principle of the present embodiment is identical as the working principle of above-described embodiment one, and so it will not be repeated.Difference is, by
In using multiple Hall detection modules, so that the Hall chip quantity in current sensor is increased, it is thus possible to more suitable
It is suitable for the detection for high current, detection accuracy is higher.
In conclusion the utility model is simple and reasonable, easy for installation, manufacturing cost is lower, and anti-interference ability is stronger.
The above description is only a preferred embodiment of the present invention, therefore all according to described in the utility model patent application range
The equivalent change or modification done of structure, feature and principle, be included in the scope of the utility model patent application.
Claims (2)
1. a kind of unshielded anti-interference current sensor, which is characterized in that including：
One is in the current-carrying conductor of serpentine, and the current-carrying conductor has the first corner part and the second corner part, and flows through institute in electric current
When stating current-carrying conductor, first corner part is opposite with the magnetic direction of second corner part；
One first Hall chip, first Hall chip are set to the inside of the current-carrying conductor, first Hall chip
Center sensitive spot and first corner part in being correspondingly arranged, when electric current flows through the current-carrying conductor, first turning
The magnetic field that portion generates passes perpendicularly through first Hall chip by the center sensitive spot of first Hall chip；
One second Hall chip, second Hall chip are connected in parallel with first Hall chip, the second Hall core
Piece is set to the outside of the current-carrying conductor, and second Hall chip and first Hall chip are oppositely arranged each other,
The center sensitive spot of second Hall chip, in being correspondingly arranged, flows through the current-carrying conductor in electric current with second corner part
When, the magnetic field that second corner part generates passes perpendicularly through second Hall by the center sensitive spot of second Hall chip
Chip.
2. a kind of unshielded anti-interference current sensor, which is characterized in that including several Hall detection modules, it is each it is described suddenly
Your detection module include one be in serpentine current-carrying conductor, one first Hall chip and one second Hall chip, each load
Current conductor is sequentially connected in series, and is constituted between the first Hall chip described in any two and/or second Hall chip in parallel
Connection；
The current-carrying conductor has the first corner part and the second corner part, and when electric current flows through the current-carrying conductor, same
First corner part of the current-carrying conductor is opposite with the magnetic direction of second corner part；
In each Hall detection module, first Hall chip is set to the inside of the corresponding current-carrying conductor, described
The center sensitive spot of first Hall chip, in being correspondingly arranged, flows through the current-carrying in electric current and leads with corresponding first corner part
When body, magnetic field that first corner part generates passes perpendicularly through described the by the center sensitive spot of corresponding first Hall chip
One Hall chip；
In each Hall detection module, second Hall chip is set to the outside of the corresponding current-carrying conductor, and institute
It states the second Hall chip and corresponding first Hall chip is oppositely arranged each other, the center sensitive spot of second Hall chip
It is in be correspondingly arranged with corresponding second corner part, when electric current flows through the current-carrying conductor, what second corner part generated
Magnetic field passes perpendicularly through second Hall chip by the center sensitive spot of corresponding second Hall chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820329326.2U CN208109917U (en) | 2018-03-12 | 2018-03-12 | A kind of unshielded anti-interference current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820329326.2U CN208109917U (en) | 2018-03-12 | 2018-03-12 | A kind of unshielded anti-interference current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208109917U true CN208109917U (en) | 2018-11-16 |
Family
ID=64126111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820329326.2U Expired - Fee Related CN208109917U (en) | 2018-03-12 | 2018-03-12 | A kind of unshielded anti-interference current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208109917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318728A (en) * | 2018-03-12 | 2018-07-24 | 宁波锦澄电子科技股份有限公司 | A kind of unshielded anti-interference current sensor |
| CN114034922A (en) * | 2021-11-23 | 2022-02-11 | 江苏兴宙微电子有限公司 | Current sensor and current detection chip |
-
2018
- 2018-03-12 CN CN201820329326.2U patent/CN208109917U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318728A (en) * | 2018-03-12 | 2018-07-24 | 宁波锦澄电子科技股份有限公司 | A kind of unshielded anti-interference current sensor |
| CN114034922A (en) * | 2021-11-23 | 2022-02-11 | 江苏兴宙微电子有限公司 | Current sensor and current detection chip |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 Termination date: 20210312 |
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| CF01 | Termination of patent right due to non-payment of annual fee |