CN212905116U - Current sensor - Google Patents
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- CN212905116U CN212905116U CN202021372874.7U CN202021372874U CN212905116U CN 212905116 U CN212905116 U CN 212905116U CN 202021372874 U CN202021372874 U CN 202021372874U CN 212905116 U CN212905116 U CN 212905116U
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- magnetic core
- coil
- current sensor
- soft magnetic
- soft
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- 238000004804 winding Methods 0.000 claims description 21
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 229910000889 permalloy Inorganic materials 0.000 claims description 4
- 239000002356 single layer Substances 0.000 claims description 3
- 229910000676 Si alloy Inorganic materials 0.000 claims description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005070 sampling Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a two poles of the earth of ampere meter are connected respectively to two department's links of coil, and the magnetic core sets up to soft magnetic core. The utility model provides a current sensor has solved being difficult to distinguish the low current value that traditional current sensor exists, has not reached the technical problem who adopts the standard, and this current sensor fixes the coil on soft-magnetic core, and the two poles of the earth of ampere meter are connected respectively to the both ends of coil, and soft-magnetic core is the magnetic material who has low coercive force and high magnetic conductivity for the measured current value that the ampere meter was surveyed is greater than the measured current value that does not have the magnetic core far away, does benefit to the resolution of low current value, satisfies the standard of sampling precision.
Description
Technical Field
The utility model relates to an electromagnetism technical field especially relates to a current sensor.
Background
The current transformer is based on the electromagnetic induction principle, the current sensor is used for being sleeved on a cable to extract a current signal in the cable, and the current sensor has the characteristics of simplicity, convenience and quickness in extracting the current signal.
In the existing current sensor, two ends of a coil (or an air coil) wound on a framework are connected with an ammeter, and a current generator is used for modulating the current value I to be 1A0Because the framework is a nonmagnetic framework, the current value I measured by the ammeter is finally obtained1Only 0.5UA, the defect that the low current value is difficult to distinguish occurs, and the standard of sampling precision cannot be achieved.
SUMMERY OF THE UTILITY MODEL
The problem that exists to prior art, the utility model provides a current sensor, the difficult low current value of distinguishing that has solved traditional current sensor existence, the technical problem who adopts the standard can not be reached, this current sensor fixes the coil on soft magnetic core, a plurality of windings are connected and are formed the closed loop together, the two poles of the earth of ampere meter are connected respectively to the both ends that form closed loop coil, soft magnetic core is the magnetic material who has low coercive force and high magnetic conductivity, make the measuring current value that the ampere meter surveyed be greater than the measuring current value that does not have the magnetic core far away, do benefit to the resolution of low current value, satisfy the standard of sampling precision.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a current sensor, this current sensor is formed by connecting a plurality of the same windings, every the winding includes the magnetic core and twines coil on the magnetic core, the two poles of the earth of ampere meter are connected respectively to two department's links of coil, the magnetic core sets up to soft magnetic core.
Further, the soft magnetic core is a soft magnetic ferrite core.
Further, the soft magnetic core is a soft magnetic alloy magnetic core.
Further, the soft magnetic core is a permalloy magnetic core.
Further, the soft magnetic core is an iron-silicon alloy magnetic core.
Further, the coil is provided as one of a printed coil, a single-layer coil, a multi-layer coil, and a honeycomb coil.
The utility model has the advantages that:
the utility model provides a current sensor, this current sensor are formed by connecting a plurality of the same windings, and every winding includes the magnetic core and the coil of winding on the magnetic core, and the two poles of the earth of ampere meter are connected respectively to the two links of coil, and the magnetic core sets up to soft-magnetic core.
The utility model provides a current sensor has solved being difficult to distinguish the low current value that traditional current sensor exists, can not reach the technical problem who adopts the standard, and this current sensor fixes the coil on soft-magnetic core, and the two poles of the earth of ampere meter are connected respectively at the both ends of coil, and soft-magnetic core is the magnetic material who has low coercive force and high magnetic conductivity for the measured current value that the ampere meter was surveyed is greater than the measured current value that does not have magnetic core winding coil far away, does benefit to the resolution of low current value, satisfies the standard of sampling accuracy.
Drawings
Fig. 1 is a schematic structural diagram of a current sensor according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a current sensor according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a current sensor in the third embodiment of the present invention.
In the figure, 1-coil, 2-soft magnetic core, 11-terminal, 12-terminal, 10-coil, 20-soft magnetic core, 101-terminal, 102-terminal, 100-coil, 200-soft magnetic core, 1001-terminal, 1002-terminal, 400-FPC
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a schematic structural diagram of a current sensor according to an embodiment of the present invention.
The utility model provides a current sensor, solved being difficult to distinguish the low current value that traditional current sensor exists, the technical problem who adopts the standard can not be reached, this current sensor fixes coil 1 on soft-magnetic core 2, the two poles of the earth of ampere meter are connected respectively at coil 1's both ends, soft-magnetic core 2 is the magnetic material who has low coercive force and high magnetic conductivity for the measured current value that the ampere meter was surveyed is greater than the measured current value that does not have magnetic core winding coil far away, do benefit to the resolution of low current value, satisfy the standard of sampling precision.
As shown in FIG. 1, a current sensor is formed by connecting a plurality of identical windings, which may be connected in series, wherein each winding comprises a soft magnetic core 2 and a coil 1 wound on the soft magnetic core 2, two terminals 11 and 12 of the coil 1 are respectively connected with the positive end and the negative end of an ammeter, and in the embodiment, the windings are in a honeycomb structure, and the distance between every two adjacent windings is equal.
In this embodiment, the soft magnetic core 2 is a magnetic core made of a magnetic material having a low coercive force and a high magnetic permeability, the soft magnetic material has magnetic amplification and storage functions, and specifically, the soft magnetic material may be a soft magnetic ferrite core or a soft magnetic alloy core, and the soft magnetic alloy core includes a permalloy core, a ferrosilicon alloy core, and the like.
Compared with an air core coil, the coil provided with the soft magnetic core 2 has the following experimental data:
1. winding a 0.08MM enameled wire into an air-core coil with an inner diameter of 5MM, an outer diameter of 8MM and a height of 6MM, connecting two ends of the coil with an ammeter, modulating the coil into 1A current by using a current generator, and measuring data as follows:
| value of primary current (A) | 1A | 0.8A | 0.6A | 0.4A | 0.2A |
| Measured current value (UA) | 0.5UA | 0.42UA | 0.34UA | 0.26UA | 0.18UA |
2. Two ends of the coil are connected with an ammeter, a soft magnetic core 2 (ferrite core) is inserted in the middle of the coil, a current generator is used for modulating the current into 1A, and the measured data are as follows:
| value of primary current (A) | 1A | 0.8A | 0.6A | 0.4A | 0.2A |
| Measured current value (UA) | 7.4UA | 6.0UA | 4.6UA | 3.2UA | 1.8UA |
According to the test data, the current value of the coil provided with the soft magnetic core 2 is obviously increased compared with that of the hollow coil at the tested end.
Example two:
referring to fig. 2, fig. 2 is a schematic structural diagram of a current sensor according to a second embodiment of the present invention.
In this embodiment, a current sensor is formed by connecting a plurality of identical windings, which may be connected in series, each winding includes a soft magnetic core 20 and a coil 10 wound on the soft magnetic core 20, two terminals 101 and 102 of the coil 10 are respectively connected to positive and negative ends of an ammeter, and the windings are in a flat winding single-layer structure; the soft magnetic core 20 is a core of a magnetic material having a low coercive force and a high permeability, and specifically may be a soft magnetic ferrite core or a soft magnetic alloy core including a permalloy core, a ferrosilicon core, or the like.
Example three:
referring to fig. 3, fig. 3 is a schematic structural diagram of a current sensor according to a third embodiment of the present invention.
In this embodiment, the current sensor includes a plurality of windings arranged in sequence to form a linear shape, and includes a coil 100 and a soft magnetic core 200, two terminals 1001 and 1002 of the coil 100 are respectively connected to positive and negative poles of an ammeter, wherein each winding is connected in series through a solder joint on a conductive circuit of a strip-shaped FPC400, and then the FPC400 is bent to form an annular structure, and after bending, the coil 100 is located on the outer side of the annular FPC400 and uniformly and circumferentially arranged along the annular structure.
The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the solutions should be covered in the scope of the claims of the present invention.
Claims (6)
1. A current sensor, characterized by: the current sensor is formed by connecting a plurality of same windings, each winding includes the magnetic core and twines coil on the magnetic core, the two poles of the earth of ampere meter are connected respectively to two department's links of coil, the magnetic core sets up to soft magnetic core.
2. The current sensor of claim 1, wherein: the soft magnetic core is a soft magnetic ferrite core.
3. The current sensor of claim 1, wherein: the soft magnetic core is a soft magnetic alloy magnetic core.
4. The current sensor of claim 3, wherein: the soft magnetic core is a permalloy magnetic core.
5. The current sensor of claim 3, wherein: the soft magnetic core is an iron-silicon alloy magnetic core.
6. The current sensor according to any one of claims 1-5, wherein: the coil is configured as one of a printed coil, a single layer coil, a multi-layer coil, and a honeycomb coil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020103656499 | 2020-04-30 | ||
| CN202010365649 | 2020-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212905116U true CN212905116U (en) | 2021-04-06 |
Family
ID=75285185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021372874.7U Active CN212905116U (en) | 2020-04-30 | 2020-07-14 | Current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212905116U (en) |
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2020
- 2020-07-14 CN CN202021372874.7U patent/CN212905116U/en active Active
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| GR01 | Patent grant | ||
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Effective date of registration: 20210729 Address after: Room 606, unit 1, 2088 Fenghuang North Road, Xiangzhou District, Zhuhai, Guangdong 519000 Patentee after: Han Tiegang Address before: 519000 two rooms in the east of the first floor of the office building, No.2 Bayi Road, Tangjiawan Town, Zhuhai City, Guangdong Province Patentee before: Zhuhai Tianji Software Co.,Ltd. |