CN2489343Y - A.C. sensor - Google Patents
A.C. sensor Download PDFInfo
- Publication number
- CN2489343Y CN2489343Y CN 01248730 CN01248730U CN2489343Y CN 2489343 Y CN2489343 Y CN 2489343Y CN 01248730 CN01248730 CN 01248730 CN 01248730 U CN01248730 U CN 01248730U CN 2489343 Y CN2489343 Y CN 2489343Y
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- Prior art keywords
- sensor
- current
- telefault
- magnetic core
- model
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Abstract
The utility model relates to an A.C. sensor, comprising a sensor shell, an electric induction coil and a magnetic core. The electric induction coil is winded on the magnetic core. The two ends of the electric induction coil are connected in parallel with a capacitor. The two side walls of the sensor shell are respectively fixed with a flat lead. The outer end of the flat lead is provided with a connecting terminal. A shield cover is arranged outside the sensor shell, and an outer shell is arranged outside the shield cover. The utility model has the advantages of simple structure, small volume, in particular accurately measuring the actual electric current flowed through a carrying current lead, outputting the voltage signal which is in direction proportion to the electric current, and filtering the interference which disturbs the pulse signal.
Description
The utility model belongs to a kind of current sensor.
When current carrying conductor near telefault, be the upright position with telefault, when current carrying conductor flow through alternating current, the telefault two ends will produce the voltage signal that is proportional to alternating current.This voltage signal can reflect the current value that the current carrying conductor actual flow is crossed truly by the dehorn metering.Therefore, it can be considered as AC current sensor.This current sensor volume is little, cost is low, realizes that detection, the monitoring to alternating current is very convenient.But there is following problem in actual applications:
1, by repeatedly, long period of experiments proves: when sparking, short circuit, heavy current impact appear in the miscellaneous equipment on the power-supply system and load, can make originally power supply stably have the spike pulse of certain amplitude, and this kind current sensor also have proportional spike pulse output.Do not surpass the protection value when load current often appears in this sensor application in the protection switch product, and the power down protection state often occurs.This is the catastrophic failure of protection switch series products, is ubiquitous problem in the real world applications.
2, a sensor can only detect the alternating current flow valuve that flows through on the current carrying conductor.If but high-intensity magnetic field (particularly alternating electromagnetic field) is arranged near sensor, and one or more current carrying conductor perhaps being arranged in addition, all can exert an influence to this sensor.Promptly the current value of current sensor senses is the integrated value of multiple factor at this moment, rather than reflects the actual current on this lead truly.
3, this sensor should be a standard component, this sensor that will ask same electric current section is when detecting same current value, the signal of sensor output all should be identical (at least should within a very little error), otherwise can be considered this standard component big discreteness is arranged on performance parameter.Be to adopt the noncontact mode during because of this current sensor senses electric current, therefore detected current carrying conductor is with the position of sensor, the shape difference of current carrying conductor, the signal of sensor output is also inequality even lead flows through identical electric current, and this just brings a lot of troubles and difficulty to practical application.
More than narration explanation, as the alternating current linear transducer,, be difficult for saturated with telefault because of magnetic core does not form the loop, be feasible in principle, but can't accurately, truly, inerrably reflect detected, the actual current value of monitoring on the current carrying conductor in actual applications.That is to say and have only telefault can't realize in actual applications as current sensor.
The purpose of this utility model is to provide a kind of energy filtering interfering pulse signal at the problems referred to above, and can detects the current value that actual flow is crossed current carrying conductor real-time and accurately, and output is proportional to the AC current sensor of the voltage signal of this electric current.
The purpose of this utility model realizes by following technical proposals, that is:
AC current sensor comprises sensor housing, magnetic core, telefault, and the telefault winding is on magnetic core, and it is external that sensor shell is stretched out at its two ends.Its main points are: capacitor in parallel at least at the cell winding two ends; On the two side of sensor housing, be fixedly connected with copper conductor respectively; Sensor housing is installed in the radome, and radome is made with ferrous material.
Outside above-mentioned radome, add shell body.
Above-mentioned copper conductor is the flat copper lead, and there is connection terminal flat copper lead outer end.
The utility model can directly be connected with digital instrument, carries out digital display, and without any need for interface or transducer, directly enters electric equipments such as computing machine or integrated circuit block, and line current is detected, monitors.And can guarantee the consistance of technical data, can use as standard component.
Above-mentioned copper conductor is the flat copper lead, and there is wiring hole flat copper lead outer end.
The utlity model has following advantage:
1, at the telefault two ends and connect electric capacity, can absorb the stray light pulse, for miscellaneous equipment on the power-supply system and load sparking, short circuit, instantaneous large-current appear and when causing sensor spike pulse output being arranged, filtering effectively, and do not influence current value actual on the detected lead.In protection electron-like switch product, when actual current does not surpass the protection value, can work safely and reliably.Can be like clockwork when in protected circuit, occur surpassing the electric current of protective current value and short circuit occurring by the time internal cutting off power supply of technical requirement.
2, sensor outside adds the radome made from ferrous material, can avoid the interference of external magnetic field and adjacent conductors to have electric current to flow through and the magnetic field that forms to the influence of sensor.Make the voltage signal of this sensor output only reflect actual current value on the detected current carrying conductor.
3, because of this sensor is to utilize the Faradic electricity magnetic induction principle, therefore the shape of the position of tested current carrying conductor and telefault distance, tested current carrying conductor all can exert an influence to the voltage signal of telefault output.The utility model is on sensor housing, flat copper lead with the constant cross-sectional area (different current values have different sectional areas) of a solid shape is placed in the special shell with telefault, wiring hole is left at flat copper lead two ends, be serially connected in use in the detected circuit, so just guaranteed shape, can both guarantee to make the voltage signal of sensor output reliable and stable regardless of detected current carrying conductor.
4, the utility model is simple in structure, cost is low, compares with mutual inductor and saves a large amount of non-ferrous metals and consume energy few.It is little, in light weight that the utility model also has a volume, advantage such as easy to install.
Fig. 1 is the surface structure synoptic diagram of a kind of embodiment of the present utility model, and Fig. 2 is an inner structure synoptic diagram of the present utility model, and the utility model is described in further detail below in conjunction with accompanying drawing.
AC current sensor comprises shell body 1, radome 2, copper conductor 3, connection terminal 4, sensor housing 5, filter capacitor 6, telefault connection terminal 7, telefault 8 and magnetic core 9.Telefault 8 windings are on magnetic core 9, and stretch out outside the shell body 1 at its two ends, and its front end is a telefault connection terminal 7.The magnetic core 9 that is arranged with telefault 8 is installed in the sensor housing 5, sensor housing 5 is installed in the shell body 1, be parallel with filter capacitor 6 at the two ends of telefault 8, on the sidewall of sensor housing 5, be fixedly connected with copper conductor 3, the outer end of copper conductor 3 is a connection terminal 4, and copper conductor 3 is the flat copper lead.Connection terminal 4 is positioned at the outside of shell body 1.
Claims (3)
1, AC current sensor, comprise that sensor housing (5), telefault (8), magnetic core (9), telefault (8) winding are installed in the sensor housing (5) after magnetic core (9) is gone up, it is characterized in that at the two ends of described telefault (a 8) filter capacitor (6) in parallel at least; Be fixedly connected with copper conductor (3) on the sidewall of sensor housing (5) respectively, the outer end of copper conductor (3) is connection terminal (4): be provided with radome (2) on sensor housing (5).
2, AC current sensor according to claim 1 is characterized in that described radome (2) is provided with shell body (1); Connection terminal (4) and telefault connection terminal (7) are positioned at the outside of shell body (1).
3, AC current sensor according to claim 1 and 2 is characterized in that described copper conductor (3) is the flat copper lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01248730 CN2489343Y (en) | 2001-07-19 | 2001-07-19 | A.C. sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01248730 CN2489343Y (en) | 2001-07-19 | 2001-07-19 | A.C. sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2489343Y true CN2489343Y (en) | 2002-05-01 |
Family
ID=33659303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01248730 Expired - Fee Related CN2489343Y (en) | 2001-07-19 | 2001-07-19 | A.C. sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2489343Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593618B (en) * | 2008-05-29 | 2011-11-02 | 栢怡国际股份有限公司 | Inductor with current sensing function and circuit thereof |
| CN105277730B (en) * | 2015-10-27 | 2017-11-07 | 舟山医院 | A kind of specific early stage of lung cancer diagnostic aid of peripheral blood |
| CN117388562A (en) * | 2023-12-11 | 2024-01-12 | 珅斯电子(上海)有限公司 | Variable magneto-inductive current sensor and calibration method thereof |
-
2001
- 2001-07-19 CN CN 01248730 patent/CN2489343Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593618B (en) * | 2008-05-29 | 2011-11-02 | 栢怡国际股份有限公司 | Inductor with current sensing function and circuit thereof |
| CN105277730B (en) * | 2015-10-27 | 2017-11-07 | 舟山医院 | A kind of specific early stage of lung cancer diagnostic aid of peripheral blood |
| CN117388562A (en) * | 2023-12-11 | 2024-01-12 | 珅斯电子(上海)有限公司 | Variable magneto-inductive current sensor and calibration method thereof |
| CN117388562B (en) * | 2023-12-11 | 2024-03-12 | 珅斯电子(上海)有限公司 | Variable magneto-inductive current sensor and calibration method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |