CN203259575U - Closed-loop current sensor - Google Patents
Closed-loop current sensor Download PDFInfo
- Publication number
- CN203259575U CN203259575U CN 201320212421 CN201320212421U CN203259575U CN 203259575 U CN203259575 U CN 203259575U CN 201320212421 CN201320212421 CN 201320212421 CN 201320212421 U CN201320212421 U CN 201320212421U CN 203259575 U CN203259575 U CN 203259575U
- Authority
- CN
- China
- Prior art keywords
- current sensor
- loop current
- circuit
- closed loop
- hall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a closed-loop current sensor which comprises a Hall element. The closed-loop current sensor further comprises a magnetism gathering ring on which a coiling wire is coiled. The magnetism gathering ring has an annular structure with an opening. The Hall element is arranged in the opening of the magnetism gathering ring. The closed-loop current sensor further comprises a power circuit, a Hall circuit and a driving circuit. The power circuit is connected with the Hall circuit. The Hall circuit is connected with the driving circuit. The driving circuit is connected with one end of the coiling wire, and the other end of the coiling wire is grounded. According to the closed-loop current sensor, a closed-loop current measuring circuit is built through utilizing a high-sensitivity Hall element, and reliable detection for complicated current signals can be realized on an engine, etc., thereby truly restoring an output current of the engine, and supplying signal support for engine control and failure determination.
Description
Technical field
The utility model relates to a kind of sensor, is specifically related to a kind of closed loop current sensor for measuring the generator output current.
Background technology
Present special vehicle, such as special equipment such as tank, Vehicle De L'Avant Blinde By Creussot and naval vessels, high-power generator all is equipped with, how effectively to control and to detect the running status of generating set, the main real-time detection that relies on the parameters of generator, wherein, the generator output current is exactly very important measurement parameter, require survey sensor that higher sensitivity and precision are arranged, even alternating current-direct current while measuring ability etc. also will be arranged.Used current metering sensor still adopts Hall element to measure DC current mostly at present, perhaps uses mutual inductor to measure exchange current.
Open loop Hall current sensor measuring principle: when electric current passes through a long lead, around wire, will produce a magnetic field, the size in this magnetic field is directly proportional with the electric current that flows through wire, and it can be assembled by magnetic core and senses on the Hall element and make it that signal output be arranged.With this signal after signal amplifier amplifies conditioning directly output just obtain the current signal that we need, the current signal accuracy of detection is subjected to that Hall element is nonlinear to be affected, and especially changes greatly when high and low temperature.
Mutual inductor is measured principle: utilize transformer primary, the proportional characteristics of secondary current to make.Ordinary electric current mutual-inductor can only be measured alternating current, and when using mutual inductor, secondary side can not be opened a way.
In sum, satisfy the reliable measurements of the equipment output currents such as generator, more than two kinds of methods all be difficult to realize.
The utility model content
The utility model has overcome the deficiencies in the prior art, and a kind of closed loop current sensor is provided, and can't carry out reliable measurements in the hope of current sensor in the prior art to be solved, the functional problem such as single.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of closed loop current sensor comprises Hall element; Described closed loop current sensor also comprises magnetism gathering rings, is wound with coiling on the described magnetism gathering rings; Described magnetism gathering rings is the ring texture that is provided with opening, and described Hall element is arranged in the opening of described magnetism gathering rings; Described closed loop current sensor also comprises power circuit, Hall circuit and driving circuit; Described power circuit is connected with described Hall circuit, and described Hall circuit is connected with described driving circuit; Described driving circuit is connected with coiling one end; Described coiling other end ground connection.
Further technical scheme is that magnetism gathering rings is to be made by the permalloy material.
Further technical scheme is that magnetism gathering rings thickness is 0.1 millimeter to 1 millimeter.
Further technical scheme is that coiling is enamel insulated wire.
Further technical scheme is that power circuit comprises voltage stabilizing diode and Technitron parallel connection.
Further technical scheme is that Hall circuit comprises amplifier electric current integrated chip LM201.
Further technical scheme is that Hall element is indium antimonide Hall unit.
Further technical scheme is that driving circuit comprises that two groups of triodes are to pipe.
Further technical scheme is to be provided with insulating material between the intermediate annular through hole of magnetism gathering rings and the sensor internal circuit.
Compared with prior art, one of the beneficial effects of the utility model are: the utility model is by using the Novel high-sensitivity Hall element to build the closed loop current measurement circuit, can realize the reliable detection to complicated current signals such as engines, true reduction engine output current, judging for engine control and fault provides the signal support.The utility model can be measured the electric current of the random waveforms such as direct current, interchange, pulse current simultaneously; Measure electric current and output signal and isolate fully, insulation voltage is greater than 6kV; Current measuring range wide (1mA to 100kA); Response time is less than 1uS; Accuracy error less than 0.5%, the linearity is less than 0.1%.
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment closed loop current of the utility model sensor.
Fig. 2 is the circuit theory diagrams of power circuit among embodiment of the utility model.
Fig. 3 is the circuit theory diagrams of Hall circuit among embodiment of the utility model.
Fig. 4 is the circuit theory diagrams of driving circuit among embodiment of the utility model.
Fig. 5 is the closed loop current sensor construction synoptic diagram of an embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further elaborated.
As shown in Figure 1, Fig. 1 shows the circuit theory diagrams of the closed loop current sensor of an embodiment of the utility model.Present embodiment closed loop current sensor comprises Hall element 12; As preferred embodiment, Hall element is indium antimonide Hall unit in the present embodiment.The type transducer sensitivity is high, in case the magnetic field out of trim is arranged, Hall just has feeble signal output, after amplifying by operational amplifier, is used for the driving power device.Present embodiment closed loop current sensor also comprises magnetism gathering rings 11, is wound with coiling on the magnetism gathering rings; As preferred embodiment, coiling is enamel insulated wire in the present embodiment.Preferred embodiment is, magnetism gathering rings is the ring texture that is provided with opening, and Hall element 11 is arranged in the opening of magnetism gathering rings; As preferred embodiment, magnetism gathering rings adopts 0.1 millimeter permalloy coiling to 1 millimeters thick to form in the present embodiment, and permalloy is a kind of than the iron-nickel alloy that higher magnetoconductivity is arranged under the low-intensity magnetic field.Can adjust according to transducer range and profile alloy thickness during use.Present embodiment closed loop current sensor also comprises power circuit, Hall circuit and driving circuit; Power circuit is connected with described Hall circuit, and Hall circuit is connected with driving circuit; Driving circuit is connected with coiling one end; Ground connection forms the loop behind the coiling other end contact resistance RL.The specific works process of present embodiment is: when major loop has an electric current I n to pass through, assembled by magnetism gathering rings in the magnetic field that wire produces and sense on the Hall element, the signal output that produces is used for driving corresponding power tube and making its conducting, thereby obtains an offset current Im.This electric current produces magnetic field by multicircuit winding again, and this magnetic field is just in time opposite with the magnetic field that tested electric current produces, thereby has compensated original magnetic field, and the output of Hall element is reduced gradually.When multiplying each other the magnetic field that produces when equating with electric current I n and the number of turn, offset current Im no longer increases, and Hall element at this moment plays indication zero magnetic flux, and can come balance this moment by offset current Im.Any variation of tested electric current all can destroy this balance.In case magnetic field out of trim, Hall element just have signal output.Behind power amplification circuit, just there is corresponding electric current to flow through secondary winding so that unbalance magnetic field is compensated immediately.Unbalance to balance again from magnetic field, less than 1 microsecond, this is the process of a mobile equilibrium on the required time theory.
As shown in Figure 2, Fig. 2 is the circuit theory diagrams of power circuit in the present embodiment closed loop current sensor.Power circuit adopts 8.2V voltage stabilizing diode D1 and Technitron J31C and Technitron J32C to provide, in parallel three 4,700 ohm resistance between voltage stabilizing diode D1 and the Technitron J31C, and Technitron J31C collector meets power supply+VCC; Voltage stabilizing diode D1 anode is connected with the base stage of Technitron J32C; The collector of Technitron J32C meets power supply-VCC; Connect the MID port behind the emitter terminal of Technitron J31C and Technitron J32C a plurality of resistance in parallel.
As shown in Figure 3, Fig. 3 is the circuit theory diagrams of Hall circuit in the present embodiment.Use amplifier electric current integrated chip LM201 to detect hall signal output, adopt indium antimonide Hall unit, the type transducer sensitivity is high, in case the magnetic field out of trim is arranged, Hall just has feeble signal output, after amplifying by operational amplifier, is used for the driving power device.The concrete mode of connection as shown in Figure 3, the VCC port of Hall element is by connecting the operating voltage vdd terminal that connects device inside behind the resistance; The GND of Hall element holds by connection circuit common ground terminal voltage VSS behind resistance of connection; The OUT1 port of Hall element by resistance connect amplifier electric current integrated chip LM201-extreme, Hall element OUT2 port by resistance connect amplifier electric current integrated chip LM201+extreme; The VEE port of amplifier electric current integrated chip LM201 meets negative voltage VEE by electric capacity; The balance ports of amplifier electric current integrated chip LM201 connects the compensation port by electric capacity; The VCC port of amplifier electric current integrated chip LM201 meets power vd D, and the output port of amplifier electric current integrated chip LM201 meets output circuit OUT.
As preferred embodiment, driving circuit has designed two groups of triodes to pipe in the present embodiment, guarantees that the external fan-out capability of sensor is sufficient, realizes that simultaneously driving circuit separates with signal deteching circuit.As shown in Figure 4, Fig. 4 is the circuit theory diagrams of driving circuit in the present embodiment, the break-make of operational amplifier output signal control triode FZT849 and triode FZT949.When OUT place voltage was higher than MID, the FZT849 conducting drove triode TIP42C, and electric current flows to coil from+VCC through triode TIP42C; When OUT place voltage was lower than MID, triode FZT949 conducting drove triode TIP41C, and electric current is from the coil process triode TIP41C flow direction-VCC.
Present embodiment closed loop current sensor construction is comprised of housing unit 54, wire-winding unit 52, printed board assembly 51, casting glue 53 as shown in Figure 5, and wire-winding unit 52 and printed board assembly 51 are installed in the housing unit 54, inject simultaneously casting glue 53.For strengthening the sensor dielectric strength, use high-strength insulating material between sensor internal circuit and the through hole 55 in the present embodiment.
" embodiment " who speaks of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the characteristics described in conjunction with this embodiment and be included among at least one embodiment that the application's generality describes.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in instructions.Furthermore, when describing a specific features, structure or characteristics in conjunction with any embodiment, what advocate is to realize that in conjunction with other embodiment this feature, structure or characteristics also drop in the scope of the present utility model.
Although a plurality of explanatory embodiment with reference to utility model is described the utility model here, but, should be appreciated that, those skilled in the art can design a lot of other modification and embodiments, and these are revised and embodiment will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes also will be obvious.
Claims (9)
1. a closed loop current sensor comprises Hall element; It is characterized in that: described closed loop current sensor also comprises magnetism gathering rings, is wound with coiling on the described magnetism gathering rings; Described magnetism gathering rings is the ring texture that is provided with opening, and described Hall element is arranged in the opening of described magnetism gathering rings; Described closed loop current sensor also comprises power circuit, Hall circuit and driving circuit; Described power circuit is connected with described Hall circuit, and described Hall circuit is connected with described driving circuit; Described driving circuit is connected with coiling one end; Described coiling other end ground connection.
2. closed loop current sensor according to claim 1 is characterized in that described magnetism gathering rings is to be made by the permalloy material.
3. closed loop current sensor according to claim 2 is characterized in that described magnetism gathering rings thickness is 0.1 millimeter to 1 millimeter.
4. closed loop current sensor according to claim 1 is characterized in that described coiling is enamel insulated wire.
5. closed loop current sensor according to claim 1 is characterized in that described power circuit comprises voltage stabilizing diode parallel with one another and Technitron.
6. closed loop current sensor according to claim 1 is characterized in that described Hall circuit comprises amplifier electric current integrated chip LM201.
7. closed loop current sensor according to claim 1 is characterized in that described Hall element is indium antimonide Hall unit.
8. closed loop current sensor according to claim 1 is characterized in that described driving circuit comprises that two groups of triodes are to pipe.
9. closed loop current sensor according to claim 1 is characterized in that being provided with insulating material between the annular through-hole of described magnetism gathering rings and the sensor internal circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212421 CN203259575U (en) | 2013-04-24 | 2013-04-24 | Closed-loop current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320212421 CN203259575U (en) | 2013-04-24 | 2013-04-24 | Closed-loop current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259575U true CN203259575U (en) | 2013-10-30 |
Family
ID=49472126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320212421 Expired - Fee Related CN203259575U (en) | 2013-04-24 | 2013-04-24 | Closed-loop current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203259575U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943901A (en) * | 2014-03-05 | 2014-07-23 | 超威电源有限公司 | Lead acid storage battery current collection system and method thereof |
| CN104201430A (en) * | 2013-11-22 | 2014-12-10 | 超威电源有限公司 | Smart battery and electric car |
| CN105572438A (en) * | 2016-03-21 | 2016-05-11 | 山东交通学院 | Current sensor processing technology |
| CN105842511A (en) * | 2016-03-30 | 2016-08-10 | 青岛乾程科技股份有限公司 | Dual-coil anti-magnetic-type current transformer |
| CN105629047B (en) * | 2015-12-24 | 2018-06-22 | 中国船舶重工集团公司第七一〇研究所 | A kind of closed-loop current sensors |
| CN109298233A (en) * | 2018-11-30 | 2019-02-01 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of alterating and direct current flow sensor |
-
2013
- 2013-04-24 CN CN 201320212421 patent/CN203259575U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201430A (en) * | 2013-11-22 | 2014-12-10 | 超威电源有限公司 | Smart battery and electric car |
| CN104201428A (en) * | 2013-11-22 | 2014-12-10 | 超威电源有限公司 | Wireless smart battery and electric car |
| CN103943901A (en) * | 2014-03-05 | 2014-07-23 | 超威电源有限公司 | Lead acid storage battery current collection system and method thereof |
| CN103943901B (en) * | 2014-03-05 | 2016-02-03 | 超威电源有限公司 | A kind of lead acid accumulator current acquisition system and method thereof |
| CN105629047B (en) * | 2015-12-24 | 2018-06-22 | 中国船舶重工集团公司第七一〇研究所 | A kind of closed-loop current sensors |
| CN105572438A (en) * | 2016-03-21 | 2016-05-11 | 山东交通学院 | Current sensor processing technology |
| CN105842511A (en) * | 2016-03-30 | 2016-08-10 | 青岛乾程科技股份有限公司 | Dual-coil anti-magnetic-type current transformer |
| CN109298233A (en) * | 2018-11-30 | 2019-02-01 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of alterating and direct current flow sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203259575U (en) | Closed-loop current sensor | |
| CN202256454U (en) | Current sensor | |
| CN106018919B (en) | A kind of wide-range broadband current sensor based on tunnel magneto-resistance effect | |
| CN202256455U (en) | Magnetic balanced type Hall current sensor | |
| CN203133146U (en) | Transformer neutral point current measuring device | |
| CN201689125U (en) | Zero magnetic flux current sensor | |
| US20130049750A1 (en) | Giant Magnetoresistance Current Sensor | |
| CN106771477B (en) | Large-caliber high-sensitivity high-voltage direct current cable leakage current detection sensor | |
| CN201732112U (en) | Voltage sensor for locomotives | |
| CN203191419U (en) | Intelligent electricity meter with diamagnetic structured electromagnetic current transformers | |
| CN102279305A (en) | Closed loop magnetic balance type Hall current sensor | |
| CN101634666A (en) | Ultra-high current Hall detection method and device | |
| CN103592490A (en) | High-accuracy electronic compensated current transformer | |
| CN103308743A (en) | Direct current metering device | |
| CN1847861B (en) | Coil current sensor with magnetic core | |
| CN105842511A (en) | Dual-coil anti-magnetic-type current transformer | |
| CN202177647U (en) | Alternating magnetic field resistant manganin diverter | |
| CN102445583A (en) | Detection method for voltage signals of power energy quality monitoring device and circuit as well as application thereof | |
| CN106093524A (en) | Magnetic core and current sensor | |
| CN203630195U (en) | Giant magnetoresistance current sensor | |
| CN203825069U (en) | High voltage AC transmission line zero sequence current detection system | |
| CN206832877U (en) | Detect device, transmitter, sensor and the automatic control system of leakage current | |
| CN105510673A (en) | Direct current measuring device | |
| CN203838223U (en) | Hall current transformer | |
| CN201429644Y (en) | large current Hall detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |