CN201285410Y - A current sensor - Google Patents
A current sensor Download PDFInfo
- Publication number
- CN201285410Y CN201285410Y CNU2008201669249U CN200820166924U CN201285410Y CN 201285410 Y CN201285410 Y CN 201285410Y CN U2008201669249 U CNU2008201669249 U CN U2008201669249U CN 200820166924 U CN200820166924 U CN 200820166924U CN 201285410 Y CN201285410 Y CN 201285410Y
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- current sensor
- iron core
- upper shell
- housing
- circuit board
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Abstract
The utility model relates to a current sensor comprising a housing, an iron core arranged in the housing, a circuit board connected with a Hall element and a cable educed from the housing and connected with the inner circuit board. The current sensor is characterized in that the housing is assembled from an upper housing and a lower housing, a through hole through which a measured current bus passes is formed between the upper housing and the lower housing; a first iron core and the circuit board which are electrically connected with each other are arranged in the upper housing; and a second iron core which corresponds to the first iron core is arranged in the lower housing. Compared with the prior art, the utility model has the advantages that the housing is formed into the upper housing and lower housing interconnected in an assembly way with the through hole arranged between the upper housing and the lower housing, thus the current sensor is more conveniently assembled and disassembled, and the measured current bus is not needed to be disassembled after using the current sensor.
Description
Technical field
The utility model relates to a kind of current sensor, is specifically related to a kind of current sensor that detects DC component in the alternating current occasion that is applicable to.
Background technology
In field of power in the electrical network, particularly in HVDC (High Voltage Direct Current) transmission system, the electric network composition of alternating current-direct current mixed running can produce larger interference to electrical network, directly the quality of influence transmission of electricity if direct current is not handled isolation over the ground, then can form DC magnetic biasing, DC magnetic biasing will cause transformer and have a strong impact on, this influence mainly contains: (1), noise, vibration increase, and cause that transformer is loosening, coil insulation wearing and tearing etc.; (2), voltage waveform degenerates, and produces a large amount of harmonic waves; (3), copper loss, iron loss increase.Carry out filtering so alternating current-direct current must be mixed in the occasion DC component, and be used for detecting the current sensor of alternating current occasion DC component as the direct current pick-up unit, can organize transformer system detects each, if any DC current, then follow-up system will be handled it every straight device by one, thereby reduce the influence of DC current to transformer station.
At present, the current sensor of DC component generally comprises housing and is arranged on the interior iron core of housing in the detection alternating current occasion commonly used, be connected with the circuit board of Hall element, lead to the cable that is connected with internal circuit board on the housing, and in the actual measurement process, because current sensor structural limitations, tested electric current busbar need be placed the iron core of current sensor, Hall element is triggered in the magnetic field that is produced by iron core then, induce by Hall element and to carry out signal by circuit board behind the Hall voltage and amplify and carry out current conversion, so the iron core of existing current sensor is made generally in hollow cylindrical body structure, also must be subjected to the restriction of core structure then to the monnolithic case of current sensor.Like this, in actual mechanical process, dismounting current sensor if desired, at first tested electric current busbar must be removed, then could the migration current sensor, and tested electric current busbar some carry electric weight big and need the transformer or the handling cable of non-stop run often, remove tested electric current busbar and will cause inconvenience real work.
The utility model content
Technical problem to be solved in the utility model provides a kind of at above-mentioned prior art only to be needed the dismounting current sensor in actual use and not to need to dismantle the current sensor of tested electric current busbar and installation, convenient disassembly.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this current sensor, comprise housing and be arranged on the interior iron core of housing, be connected with the circuit board of Hall element, lead to the cable that is connected with internal circuit board on the housing, it is characterized in that: described housing is by upper shell, lower house assembles, and be formed with the through hole that passes for tested electric current busbar between upper shell and the lower house, be provided with first iron core and described circuit board in the described upper shell, and described first iron core is electrically connected mutually with described circuit board, is provided with in the described lower house and corresponding second iron core of first iron core.
Like this, in actual use, during installation, only tested electric current busbar need be placed in the through hole between upper shell and the lower house, and then upper shell and lower house are assembled, just can the DC component of surveying in the electric current busbar have been detected; And after be used to complete, only upper shell and lower house need be separated, current sensor can be separated tested electric current busbar, and tested electric current busbar do not need to move the place, do not need to dismantle tested electric current busbar yet.
Here, can assemble by screw between upper shell and the lower house, the upper shell bottom is provided with two flanks, and is corresponding, and the top of lower house also is provided with two flanks, and screw passes the flank of upper and lower casing upper and lower casing is assembled connection.
Do outer the improvement, the free end of the described cable water-proof connector that has been threaded, be threaded both to make things convenient for and install, guarantee again to connect reliably, obscission can not take place, prevent the grid short circuit accident, and the length of the cable that current sensor is self-contained can be shorter, makes things convenient for the installation and the transportation of current sensor integral body, and cable can be prolonged by water-proof connector, be suitable for outdoor long-range installation, can not influence the use of current sensor.
Improve, be provided with first insulating sheath that is used to resist the superpotential impact between described first iron core and the described upper enclosure inner wall, this first insulating sheath covers on outside described first iron core.
Same, being provided with second insulating sheath that is used to resist the superpotential impact between described second iron core and the described lower house inwall, this second insulating sheath covers on outside described second iron core.
Because, first iron core and second iron core are directly with inner walls is contacted up and down, and, generally speaking, last lower house can adopt metal material to make, and the setting of first insulating sheath and second insulating sheath has been arranged, the superpotential that can resist in the high-voltage fence is impacted, and prevents the withstand voltage puncture between high tension loop and the low tension loop.
For the damage that the surge voltage that effectively prevents power end causes sensor, described circuit board is provided with the surge voltage absorbing circuit of being made up of discharge tube, TVS pipe and electric capacity.
Described circuit board is provided with amplifying circuit, multistage filtering circuit and current converter circuit, described Hall component output links to each other with the input end of described amplifying circuit, the output terminal of described amplifying circuit links to each other with the input end of described multistage filtering circuit, the output terminal of described multistage filtering circuit links to each other with the input end of described current converter circuit, the output terminal of described current converter circuit links to each other with described cable, here the setting of multistage filtering circuit can detect the dc parameter in the alternating current effectively.
What be highly profitable is, described Hall element is directly installed on the described circuit board, like this, can remove and connects lead between the internal circuit, improves the Electro Magnetic Compatibility of whole current sensor.
Improve, described upper shell is provided with the upper shell cover that is used to open described upper shell again, and this upper shell cover is connected with upper shell by screw, and described lower house is provided with the lower cover that is used to open described lower house, and this lower cover is connected with lower house by screw.
At last, the waterproof gasket cement embedding is adopted at the inner position that is connected with described cable of described upper shell
Compared with prior art, advantage of the present utility model is: by being provided with the upper shell and the lower house that assembling mode connects that pass through of through hole in the middle of housing is made, make that installation, the dismounting of current sensor are convenient, and current sensor does not need to dismantle tested electric current busbar after using.In addition, the free end of the cable water-proof connector that is threaded, both made things convenient for the installation of current sensor, guarantee again to connect reliably, obscission can not take place, prevent the grid short circuit accident, simultaneously can make the short slightly of the self-contained cable length system of current sensor, make things convenient for the installation and the transportation of current sensor integral body, be suitable for outdoor long-range installation, can not influence the use of current sensor.
Description of drawings
Fig. 1 is the perspective view of current sensor among the utility model embodiment;
Fig. 2 is the explosive view of current sensor among the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Current sensor shown in Fig. 1～2 comprises the housing that is assembled by upper shell 1, lower house 2, is formed with the through hole 3 that passes for tested electric current busbar between upper shell 1 and the lower house 2.Here, upper shell 1 and lower house 2 are made by metal, assemble by screw 13 between upper shell 1 and the lower house 2, the upper shell bottom is provided with two flanks 11, corresponding, the top of lower house also is provided with two flanks 21, and the flank 11,21 that screw 13 passes upper and lower casing connects the upper and lower casing assembling.And upper shell 1 is provided with the upper shell cover 12 that is used to open upper shell 1, and this upper shell cover 12 is to be connected with upper shell by screw, and also is provided with the lower cover 22 that is used to open lower house 2 on the lower house 2, and this lower cover is to be connected with lower house by screw equally.Through hole 3 can be square through hole, also can be manhole, also can be the through hole of other shapes.
Be provided with first iron core 4 and circuit board 5 in the upper shell 1, and first iron core 4 is electrically connected mutually with circuit board 5, the upper end of upper shell 1 leads to the cable 6 that is electrically connected with internal circuit board 5, and the waterproof gasket cement embedding is adopted at the upper shell 1 inner position that is connected with cable 6; Be provided with in the lower house 2 and corresponding second iron core 7 of first iron core.
The free end of cable 6 water-proof connector 8 that has been threaded.Water-proof connector 8 adopts to be threaded and both makes things convenient for the installation of cable, guarantee to connect reliable again, obscission can not take place, prevent the grid short circuit accident, and the length of the cable that current sensor is self-contained can be shorter, makes things convenient for the installation and the transportation of current sensor integral body, and cable can be prolonged by water-proof connector, be suitable for outdoor long-range installation, can not influence the use of current sensor.
In the present embodiment, be provided with first insulating sheath 9 that is used to resist the superpotential impact between first iron core 4 and upper shell 1 inwall, this first insulating sheath 9 covers on outside first iron core 4.Corresponding, be provided with second insulating sheath 10 that is used to resist the superpotential impact between second iron core 7 and lower house 2 inwalls, this second insulating sheath cover 10 covers on outside second iron core 7.Like this, the setting of first insulating sheath and second insulating sheath has been arranged, the superpotential that can resist in the high-voltage fence is impacted, and prevents the withstand voltage puncture between high tension loop and the low tension loop.
Generally, current sensor need be used in the outdoor comparatively complex environment, if run into thunder and lightning weather, the circuit board in the current sensor is easy to be subjected to thunder and lightning and attacks, in the present embodiment, circuit board 5 is provided with the surge voltage absorbing circuit of being made up of discharge tube, TVS pipe and electric capacity.
And, also be provided with amplifying circuit, multistage filtering circuit and current converter circuit on the circuit board 5, Hall component output links to each other with the input end of amplifying circuit, the output terminal of amplifying circuit links to each other with the input end of multistage filtering circuit, the output terminal of multistage filtering circuit links to each other with the input end of current converter circuit, and the output terminal of current converter circuit links to each other with cable.
In addition, in the present embodiment, Hall element is to be directly installed on the described circuit board, like this, can remove and connects lead between the internal circuit, improves the Electro Magnetic Compatibility of whole current sensor.
Claims (9)
1, a kind of current sensor, comprise housing and be arranged on the interior iron core of housing, be connected with the circuit board (5) of Hall element, lead to the cable (6) that is connected with internal circuit board (5) on the housing, it is characterized in that: described housing is by upper shell (1), lower house (2) assembles, and be formed with the through hole (3) that passes for tested electric current busbar between upper shell (1) and the lower house (2), be provided with first iron core (4) and described circuit board (5) in the described upper shell (1), and described first iron core (4) is electrically connected mutually with described circuit board (5), is provided with in the described lower house (2) and corresponding second iron core of first iron core (4) (7).
2, current sensor according to claim 1 is characterized in that: the free end of described cable (6) water-proof connector (8) that has been threaded.
3, current sensor according to claim 1, it is characterized in that: be provided with first insulating sheath (9) that is used to resist the superpotential impact between described first iron core (4) and described upper shell (1) inwall, this first insulating sheath (9) covers on outside described first iron core (4).
4, current sensor according to claim 1, it is characterized in that: be provided with second insulating sheath (10) that is used to resist the superpotential impact between described second iron core (7) and described lower house (2) inwall, this second insulating sheath (10) covers on outside described second iron core (7).
5, current sensor according to claim 1 is characterized in that: described circuit board (5) is provided with the surge voltage absorbing circuit of being made up of discharge tube, TVS pipe and electric capacity.
6, current sensor according to claim 1, it is characterized in that: described circuit board (5) is provided with amplifying circuit, multistage filtering circuit and current converter circuit, described Hall component output links to each other with the input end of described amplifying circuit, the output terminal of described amplifying circuit links to each other with the input end of described multistage filtering circuit, the output terminal of described multistage filtering circuit links to each other with the input end of described current converter circuit, and the output terminal of described current converter circuit links to each other with described cable.
7, current sensor according to claim 1 is characterized in that: described Hall element is directly installed on the described circuit board.
8, according to the described current sensor of the arbitrary claim of claim 1～7, it is characterized in that: described upper shell (1) is provided with the upper shell cover (12) that is used to open described upper shell (1), this upper shell cover (12) is connected with upper shell (1) by screw, described lower house (2) is provided with the lower cover (21) that is used to open described lower house (2), and this lower cover (21) is connected with lower house (2) by screw.
9, according to the described current sensor of the arbitrary claim of claim 1～7, it is characterized in that: the waterproof gasket cement embedding is adopted at the inner position that is connected with described cable of described upper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201669249U CN201285410Y (en) | 2008-10-24 | 2008-10-24 | A current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201669249U CN201285410Y (en) | 2008-10-24 | 2008-10-24 | A current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285410Y true CN201285410Y (en) | 2009-08-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201669249U Expired - Lifetime CN201285410Y (en) | 2008-10-24 | 2008-10-24 | A current sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN201285410Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963631A (en) * | 2010-08-31 | 2011-02-02 | 株洲南车时代电气股份有限公司 | High-current direct current sensor and manufacturing method thereof |
| CN102411081A (en) * | 2011-11-29 | 2012-04-11 | 株洲南车时代电气股份有限公司 | Split heavy current repeater Hall current sensor |
| CN102866282A (en) * | 2012-09-11 | 2013-01-09 | 中国科学院等离子体物理研究所 | Zero-flux hall large-current sensor structure |
| CN108132306A (en) * | 2017-12-25 | 2018-06-08 | 常州波速传感器有限公司 | A kind of self assembly oxygen concentration sensor |
| CN109799380A (en) * | 2019-01-29 | 2019-05-24 | 湖南银河电气有限公司 | A kind of integrated electric flow sensor and its packaging method |
| CN112526192A (en) * | 2020-11-23 | 2021-03-19 | 宁波中车时代传感技术有限公司 | Integrated chip type current sensor and manufacturing method thereof |
| CN113884950A (en) * | 2021-09-28 | 2022-01-04 | 国家电网有限公司 | Main transformer impulse current on-line monitoring appearance |
-
2008
- 2008-10-24 CN CNU2008201669249U patent/CN201285410Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963631A (en) * | 2010-08-31 | 2011-02-02 | 株洲南车时代电气股份有限公司 | High-current direct current sensor and manufacturing method thereof |
| CN101963631B (en) * | 2010-08-31 | 2015-06-10 | 株洲南车时代电气股份有限公司 | High-current direct current sensor and manufacturing method thereof |
| CN102411081A (en) * | 2011-11-29 | 2012-04-11 | 株洲南车时代电气股份有限公司 | Split heavy current repeater Hall current sensor |
| CN102866282A (en) * | 2012-09-11 | 2013-01-09 | 中国科学院等离子体物理研究所 | Zero-flux hall large-current sensor structure |
| CN102866282B (en) * | 2012-09-11 | 2014-11-26 | 中国科学院等离子体物理研究所 | Zero-flux hall large-current sensor structure |
| CN108132306A (en) * | 2017-12-25 | 2018-06-08 | 常州波速传感器有限公司 | A kind of self assembly oxygen concentration sensor |
| CN109799380A (en) * | 2019-01-29 | 2019-05-24 | 湖南银河电气有限公司 | A kind of integrated electric flow sensor and its packaging method |
| CN109799380B (en) * | 2019-01-29 | 2021-03-02 | 湖南银河电气有限公司 | Integrated current sensor and packaging method thereof |
| CN112526192A (en) * | 2020-11-23 | 2021-03-19 | 宁波中车时代传感技术有限公司 | Integrated chip type current sensor and manufacturing method thereof |
| CN113884950A (en) * | 2021-09-28 | 2022-01-04 | 国家电网有限公司 | Main transformer impulse current on-line monitoring appearance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090805 |