CN107328979A - A kind of simplex winding Toroidal current sensor - Google Patents
A kind of simplex winding Toroidal current sensor Download PDFInfo
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- CN107328979A CN107328979A CN201710479003.1A CN201710479003A CN107328979A CN 107328979 A CN107328979 A CN 107328979A CN 201710479003 A CN201710479003 A CN 201710479003A CN 107328979 A CN107328979 A CN 107328979A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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Abstract
The present invention provides a kind of simplex winding Toroidal current sensor, using core material of the permalloy as fluxgate magnetic core, the signal to noise ratio of the magnetic flux gate signal of generation is sufficiently high, closed loop feedback is formed without producing compensation magnetic field by secondary winding, can be directly entered in signal conditioning circuit and carry out error correction and signal amplification；Therefore existing double winding coil is changed to simplex winding coil by the present invention, only current signal is can be realized as to the conversion of magnetic flux gate signal, magnetic flux gate signal to voltage signal using an armature winding, so as to measure the current signal in tested electric current line, the present invention not only simplifies Product Process, it also add production reliability, during the current signal of the tested electric current line of measurement, precision is higher；The present invention is also improved signal conditioning circuit, output signal is nursed one's health by two-stage amplifying circuit, it is ensured that properties of product do not degrade.
Description
Technical field
The invention belongs to current sensing techniques field, more particularly to a kind of simplex winding Toroidal current sensor.
Background technology
Existing fluxgate current sensor technology is double winding scheme, as shown in figure 1, by exciting circuit 13 in primary
Winding 11 produces magnetic flux gate signal, but the signal to noise ratio of magnetic flux gate signal is not high enough, if be directly amplified, passes through the magnetic flux
The current signal precision that gate signal is measured in tested electric current line is not high, therefore magnetic flux gate signal needs filtered circuit 14 to filter
Nursed one's health afterwards by signal conditioning circuit, then produce the formation of compensation magnetic field on secondary windings 12 through feedback compensation circuit 16 and close
Ring feeds back, and improves signal to noise ratio.In addition, prior art uses silicon steel core so that small product size is larger, the general of product is limited
Property；Simultaneously primary, secondary double winding can increase process complexity, reduce production reliability.
The content of the invention
To solve the above problems, the present invention provides a kind of simplex winding Toroidal current sensor, the present invention is to magnetic core
Material, circuit theory are redesigned, and magnetic core size is reduced, and double winding is changed to simplex winding, are treated meeting accurate measurement
On the premise of the current signal performance requirement surveyed in electric current line, the volume of product is also reduced, production technology is simplified.
A kind of simplex winding Toroidal current sensor, including fluxgate magnetic core and signal processing circuit, wherein signal
Process circuit includes filter circuit 31, exciting circuit 32, power circuit 33 and signal conditioning circuit 34；The power circuit 33
Burning voltage is provided to signal conditioning circuit 34, exciting circuit 32 provides pumping signal to fluxgate magnetic core, so that fluxgate is visited
Head produces magnetic flux gate signal, and the magnetic flux gate signal that filter circuit 31 is produced to fluxgate magnetic core is filtered；
The signal conditioning circuit 34 is corrected to zero offset, the sensitivity error of filtered magnetic flux gate signal,
And the magnetic flux gate signal after correction is directly over two grades of amplifications, and nurse one's health into analog voltage signal output, wherein analog voltage
Signal with tested electric current line current signal it is corresponding；
The fluxgate magnetic core includes armature winding 21, and armature winding 21 is the annular magnetic that outer layer is wound with enamel-covered wire
The material of core, wherein toroidal core is permalloy, and enamel-covered wire two ends wind and be welded on exciting circuit 32 respectively；
Tested electric current line is passed through in the middle of the toroidal core, in the presence of the pumping signal, fluxgate magnetic core sense
The magnetic field around the tested electric current line is answered, so as to produce magnetic flux gate signal.
Further, the fluxgate magnetic core also includes skeleton 22；
The shape of skeleton 22 and the form fit of armature winding 21, while centre is provided with threading hole 26, and armature winding 21
It is placed on around threading hole 26 in skeleton 22, then is tested electric current line and is passed through in the middle of threading hole 26；
The frame of the skeleton 22 is provided with mounting seat, while mounting seat is provided with coiling capillary I 23, coiling capillary II
24th, fixed capillary I 27 and fixed capillary II 28；
The enamel-covered wire two ends of the armature winding 21 wind and are welded on coiling capillary I 23 and coiling capillary II 24 respectively
On, coiling capillary I 23 and coiling capillary II 24 are connected on exciting circuit 32 again；
The skeleton 22 is connected by mounting seat, fixed capillary I 27 and fixed capillary II 28 with circuit board, wherein described
Signal processing circuit is welded on circuit boards.
Further, the frame of skeleton 22 is provided with 4 mounting seats, wherein coiling capillary I 23 and coiling capillary II 24
In same mounting seat, fixed capillary I 27 and fixed capillary II 28 are respectively provided in a mounting seat, and are set in mounting seat
There is height less than the boss of 4 capillary height.
Further, crossed beam trunking 25 is also provided with the mounting seat provided with coiling capillary I 23 and coiling capillary II 24.
Further, the filter circuit 31 includes operational amplifier N1B, resistance R10 and electric capacity C1, C2, C5, C6；
Described electric capacity C1, C2 are filter capacitor, and both of which respectively takes one end to be connected to operational amplifier N1B power end, separately
One end is grounded；Operational amplifier N1B input positive terminals are grounded, resistance R10 two ends difference concatenation operation amplifier N1B input negative terminal
And output end, two ends difference concatenation operation amplifier N1B input negative terminal and output end after electric capacity C5, C6 series connection, and electric capacity C5,
The input of magnetic flux gate signal is used as at C6 tie points.
Further, the exciting circuit 32 includes operational amplifier N1A, voltage-stabiliser tube V3, V4, resistance R1, R2, R5, R6
And electric capacity C8；
The input positive terminal of the operational amplifier N1A is grounded by resistance R5, and input positive terminal by resistance R6 connections from
The output end of body；Operational amplifier N1A output end connection voltage-stabiliser tube V3 anodes, and voltage-stabiliser tube V3 negative terminals connection voltage-stabiliser tube V4 is negative
End, voltage-stabiliser tube V4 positive ending groundings；Fluxgate magnetic core and electric capacity C8 be parallel to operational amplifier N1A input negative terminal and output end it
Between；Meanwhile, operational amplifier N1A input negative terminal is grounded by resistance R2, and input negative terminal by resistance R1 to filter circuit
31 output magnetic flux gate signals.
Further, the power circuit 33 includes voltage-regulator diode V1, V2 and current-limiting resistance R3, R7；
The current-limiting resistance R3, voltage-regulator diode V1, voltage-regulator diode V2 and current-limiting resistance R7 are sequentially connected in series, and current limliting
Resistance R3, R7 empty pin connect positive supply, negative supply respectively, and a ground connection is connected in series between voltage-regulator diode V1, V2；Power supply
Voltage of the circuit 33 from voltage-regulator diode V1 negative terminals and the output of voltage-regulator diode V2 anodes after stable, is supplied to signal conditioning circuit 34
Electricity.
Further, the signal conditioning circuit 34 include operational amplifier N2A, N2B, resistance R4, R8, R9, R11~
R20, and electric capacity C3, C4, C7, C9, C10；
Described resistance R11, R12 are zero-regulator resistor, are serially connected between the positive and negative two ends of the output end of power circuit 33, simultaneously
Connection resistance R13 one end at being connected in series between resistance R11, R12, the resistance R13 other ends are grounded by resistance R14,
And pass through resistance R8 concatenation operation amplifiers N2B input negative terminal；Operational amplifier N2B input positive terminal is connected by resistance R4
To the fluxgate signal output part of exciting circuit 32；Resistance R15, R16, R18 are debugging resistance, and resistance R16 and resistance R18 are simultaneously
Connected again with resistance R15 after connection, so latter two series connection end is in parallel with electric capacity C9, and two parallel connected ends are reconnected in operational amplifier
Between N2B input negative terminal and output end；
Described electric capacity C3, C4 are filter capacitor, and wherein one end is respectively connected to operational amplifier N2B power end, separately
One end is grounded；Meanwhile, operational amplifier N2B output end is connected to operational amplifier N2A input positive terminal by resistance R19；
Electric capacity C7 and resistance R20 are parallel between operational amplifier N2A input positive terminal and ground；Operational amplifier N2A input negative terminal
It is grounded by resistance R9, resistance R17 and electric capacity C10 are parallel between operational amplifier N2A input negative terminal and output end, computing
The analog voltage signal of amplifier N2A output is the final output of current sensor.
Preferably, enamel-covered wire is enclosed in the magnetic core outer layer winding 1000~2000.
Beneficial effect：
1st, existing fluxgate sensor uses double winding pattern, and the present invention is using magnetic of the permalloy as fluxgate magnetic core
Core material, the signal to noise ratio of the magnetic flux gate signal of generation is sufficiently high, anti-without producing compensation magnetic field formation closed loop by secondary winding
Feedback, can be directly entered in signal conditioning circuit and carry out error correction and signal amplification；Therefore it is of the invention by existing double winding
Coil is changed to simplex winding coil, and only can be realized as current signal using an armature winding believes to magnetic flux gate signal, fluxgate
The conversion of voltage signal number is arrived, so as to measure the current signal in tested electric current line, the present invention not only simplifies Product Process,
Production reliability is also add, during the current signal of the tested electric current line of measurement, precision is higher；
The present invention coordinates simplex winding coil to improve circuit arrangement simultaneously, including eliminates feedback compensation circuit,
Without producing compensation magnetic field, the open loop policy directly amplified using second amplifying circuit is changed to, magnetic flux gate signal is directly amplified
Output；This invention simplifies power circuit, for new magnetic core and coil, exciting circuit is redesigned, enhanced sharp
Encourage the stability of signal；Also filter circuit is adjusted simultaneously, filter stop bend degree of suppression is improved；Finally signal is adjusted
Reason circuit is improved, and output signal is nursed one's health by two-stage amplifying circuit, it is ensured that properties of product do not degrade；
The present invention reduces magnetic core size, and the permalloy magnetic core of selection high permeability replaces existing silicon steel core, increases
The volume and weight of product is reduced while strong signal intensity, original larger product is may apply to volume and weight
In the system of restricted requirement, product versatility is added.
2nd, armature winding is placed in skeleton by the present invention, is fixed on circuit boards fluxgate magnetic core by skeleton, is made magnetic
Open gate current sensor structure is more firm；Meanwhile, boss is set in the mounting seat of skeleton so that skeleton is reverse mounted in electricity
When on the plate of road, the pad of armature winding and coiling capillary is not oppressed damage.
3rd, be also provided with crossed beam trunking at the mounting seat of coiling capillary I and coiling capillary II of the present invention, be conducive to protection primary around
The enamel-covered wire of group is not by crushing.
Brief description of the drawings
Fig. 1 is original scheme sensor circuit schematic diagram；
Fig. 2 is inventive sensor sonde configuration schematic diagram；
Fig. 3 is inventive sensor circuit theory diagrams；
11- existing scheme armature windings, 12- existing scheme secondary windings, 13- existing scheme exciting circuits, the existing sides of 14-
Case filter circuit, 15- existing scheme signal conditioning circuits, 16- existing scheme feedback compensation circuits, 17- existing schemes signal electricity
Source circuit, 21- armature windings, 22- skeletons, 23- coilings capillary I, 24- coilings capillary II, 25- crossed beam trunkings, 26- threading holes, 27-
Fixed capillary I, 28- fixes capillary II, 31- filter circuits, 32- exciting circuits, 33- signal conditioning circuits, 34- signal power sources electricity
Road, 35- fluxgate magnetic cores.
Embodiment
With reference to the accompanying drawings and examples, the present invention is described in detail.
A kind of simplex winding Toroidal current sensor, including fluxgate magnetic core and signal processing circuit；
As shown in figure 3, being inventive sensor circuit theory diagrams, the signal processing circuit includes filter circuit 31, swashed
Circuit 32, power circuit 33, signal conditioning circuit 34 and fluxgate magnetic core 35 are encouraged, wherein power circuit 33 gives signal condition electricity
Road 34 provides burning voltage, and exciting circuit 32 provides pumping signal to fluxgate magnetic core 35, so that fluxgate magnetic core 35 produces magnetic
Open gate signal, the magnetic flux gate signal that filter circuit 31 is produced to fluxgate magnetic core 35 is filtered, 34 pairs of institutes of signal conditioning circuit
Zero offset, the sensitivity error for stating signal processing circuit and filtered magnetic flux gate signal are corrected, and by after correction
Fluxgate signal condition exported into analog voltage signal, pair of current signal wherein in analog voltage signal and tested electric current line
Should；
As shown in Fig. 2 being inventive sensor sonde configuration schematic diagram, the fluxgate magnetic core 35 includes armature winding
21, and armature winding 21 is used as the fluxgate magnetic core 35 in signal processing circuit；
The armature winding 21 is wound with the toroidal core of enamel-covered wire for outer layer, and enamel-covered wire two ends wind and welded respectively
On exciting circuit 32；
Tested electric current line is passed through in the middle of the toroidal core, in the presence of the pumping signal, fluxgate magnetic core 35
The magnetic field around the tested electric current line is sensed, so as to produce magnetic flux gate signal.
Further, the fluxgate magnetic core 35 also includes skeleton 22；
The shape of skeleton 22 and the form fit of armature winding 21, while centre is provided with threading hole 26, and armature winding 21
It is placed between skeleton 22 and threading hole 26, then is tested electric current line and is passed through in the middle of threading hole 26；
The frame of the skeleton 22 is provided with mounting seat, while mounting seat is provided with coiling capillary I 23, coiling capillary II
24th, fixed capillary I 27 and fixed capillary II 28；
The enamel-covered wire two ends of the armature winding 21 wind and are welded on coiling capillary I 23 and coiling capillary II 24 respectively
On, coiling capillary I 23 and coiling capillary II 24 are connected on exciting circuit 32 again；
The skeleton 22 is connected by mounting seat, fixed capillary I 27 and fixed capillary II 28 with circuit board.
Further, the filter circuit 31 includes operational amplifier N1B, resistance R10 and electric capacity C1, C2, C5, C6；
Described electric capacity C1, C2 are filter capacitor, and one end is connected to operational amplifier N1B power end, the other end respectively
Ground connection；Operational amplifier N1B input positive terminals are grounded, resistance R10 two ends difference concatenation operation amplifier N1B input negative terminal and defeated
Go out end, two ends difference concatenation operation amplifier N1B input negative terminal and output end after electric capacity C5, C6 series connection, and electric capacity C5, C6 company
Junction connects the output end of the magnetic flux gate signal of fluxgate magnetic core 35.
Further, the exciting circuit 32 includes operational amplifier N1A, voltage-stabiliser tube V3, V4, resistance R1, R2, R5, R6
And electric capacity C8；
The input positive terminal of the operational amplifier N1A is grounded by resistance R5, and input positive terminal by resistance R6 connections from
The output end of body；Operational amplifier N1A output end connection voltage-stabiliser tube V3 anodes, and voltage-stabiliser tube V3 negative terminals connection voltage-stabiliser tube V4 is negative
End, voltage-stabiliser tube V4 positive ending groundings；Fluxgate magnetic core 35 and electric capacity C8 are parallel to operational amplifier N1A input negative terminal and output end
Between；Meanwhile, operational amplifier N1A input negative terminal is grounded by resistance R2, and input negative terminal by resistance R1 to filtered electrical
Road 31 exports magnetic flux gate signal.
Further, the power circuit 33 includes voltage-regulator diode V1, V2 and current-limiting resistance R3, R7；
The current-limiting resistance R3, voltage-regulator diode V1, voltage-regulator diode V2 and current-limiting resistance R7 connect in order successively,
And current-limiting resistance R3, R7 empty pin connect positive supply, negative supply respectively, being connected in series between voltage-regulator diode V1, V2 a little connects
Ground；Voltage of the power circuit 33 from voltage-regulator diode V1 negative terminals and the output of voltage-regulator diode V2 anodes after stable, to signal condition
Circuit 34 is powered.
Further, the signal conditioning circuit 34 include operational amplifier N2A, N2B, resistance R4, R8, R9, R11~
R20, and electric capacity C3, C4, C7, C9, C10；
Described resistance R11, R12 are zero-regulator resistor, are serially connected between the positive and negative two ends of the output end of power circuit 33, simultaneously
Connection resistance R13 at being connected in series between resistance R11, R12；The resistance R13 other ends are grounded by resistance R14, and are passed through
Resistance R8 concatenation operation amplifiers N2B input negative terminal；Operational amplifier N2B input positive terminal is connected to excitation by resistance R4
The fluxgate signal output part of circuit 32；Resistance R15, R16, R18 are to debug resistance, and after resistance R16 and resistance R18 parallel connections again
Connected with resistance R15, so latter two series connection end is in parallel with electric capacity C9, and two parallel connected ends are reconnected in the defeated of operational amplifier N2B
Enter between negative terminal and output end；
Described electric capacity C3, C4 are filter capacitor, and wherein one end is respectively connected to operational amplifier N2B power end, separately
One end is grounded；Meanwhile, operational amplifier N2B output end is connected to operational amplifier N2A input positive terminal by resistance R19；
Electric capacity C7 and resistance R20 are parallel between operational amplifier N2A input positive terminal and ground；Operational amplifier N2A input negative terminal
It is grounded by resistance R9, resistance R17 and electric capacity C10 are parallel between operational amplifier N2A input negative terminal and output end, computing
The analog voltage signal of amplifier N2A output is the final output of current sensor.
Further, the material of the toroidal core is permalloy.
Further, enamel-covered wire is enclosed in the magnetic core outer layer winding 1000~2000.
Further, the frame of skeleton 22 is provided with 4 mounting seats, wherein coiling capillary I 23 and coiling capillary II 24
In same mounting seat, fixed capillary I 27 and fixed capillary II 28 are respectively provided in a mounting seat, and are set in mounting seat
There is height less than the boss of 4 capillary height.
Further, crossed beam trunking 25 is also provided with the mounting seat provided with coiling capillary I 23 and coiling capillary II 24.
The present invention simplex winding Toroidal current sensor scheme can make small product size be less than 30mm × 30mm ×
20mm, while being tested measurement accuracy in current range in 10mA~400mA reaches 1%.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and change ought can be made according to the present invention by knowing those skilled in the art
Shape should all belong to the protection domain of appended claims of the invention.
Claims (9)
1. a kind of simplex winding Toroidal current sensor, including fluxgate magnetic core and signal processing circuit, wherein at signal
Managing circuit includes filter circuit (31), exciting circuit (32), power circuit (33) and signal conditioning circuit (34)；The power supply
Circuit (33) provides burning voltage to signal conditioning circuit (34), and exciting circuit (32) provides pumping signal to fluxgate magnetic core,
So as to which fluxgate magnetic core produces magnetic flux gate signal, the magnetic flux gate signal that filter circuit (31) is produced to fluxgate magnetic core is filtered
Ripple；
Characterized in that, zero offset, sensitivity error of the signal conditioning circuit (34) to filtered magnetic flux gate signal
It is corrected, and the magnetic flux gate signal after correction is directly over two grades of amplifications, and nurses one's health into analog voltage signal output, wherein
Analog voltage signal with tested electric current line current signal it is corresponding；
The fluxgate magnetic core includes armature winding (21), and armature winding (21) is the annular magnetic that outer layer is wound with enamel-covered wire
The material of core, wherein toroidal core is permalloy, and enamel-covered wire two ends wind and be welded on exciting circuit (32) respectively；
Tested electric current line is passed through in the middle of the toroidal core, in the presence of the pumping signal, fluxgate magnetic core sensing institute
The magnetic field around tested electric current line is stated, so as to produce magnetic flux gate signal.
2. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the fluxgate is visited
Head also includes skeleton (22)；
Skeleton (22) shape and armature winding (21) form fit, while centre is provided with threading hole (26), and armature winding
(21) it is placed on around threading hole (26) in skeleton (22), then is tested electric current line and is passed through in the middle of threading hole (26)；
The frame of the skeleton (22) is provided with mounting seat, while mounting seat is provided with coiling capillary I (23), coiling capillary II
(24), fixed capillary I (27) and fixed capillary II (28)；
The enamel-covered wire two ends of the armature winding (21) wind and are welded on coiling capillary I (23) and coiling capillary II (24) respectively
On, coiling capillary I (23) and coiling capillary II (24) are connected on exciting circuit (32) again；
The skeleton (22) is connected by mounting seat, fixed capillary I (27) and fixed capillary II (28) with circuit board, wherein institute
State signal processing circuit welding on circuit boards.
3. a kind of simplex winding Toroidal current sensor as claimed in claim 2, it is characterised in that the skeleton (22)
Frame is provided with 4 mounting seats, and wherein coiling capillary I (23) and coiling capillary II (24) is fixed in same mounting seat
Capillary I (27) and fixed capillary II (28) are respectively provided in a mounting seat, and mounting seat is provided with less than 4 capillary height of height
The boss of degree.
4. a kind of simplex winding Toroidal current sensor as claimed in claim 2 or claim 3, it is characterised in that provided with coiling
Crossed beam trunking (25) is also provided with the mounting seat of capillary I (23) and coiling capillary II (24).
5. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the filter circuit
(31) operational amplifier N1B, resistance R10 and electric capacity C1, C2, C5, C6 are included；
Described electric capacity C1, C2 are filter capacitor, and both of which respectively takes one end to be connected to operational amplifier N1B power end, the other end
Ground connection；Operational amplifier N1B input positive terminals are grounded, resistance R10 two ends difference concatenation operation amplifier N1B input negative terminal and defeated
Go out end, two ends difference concatenation operation amplifier N1B input negative terminal and output end after electric capacity C5, C6 series connection, and electric capacity C5, C6 company
Junction as magnetic flux gate signal input.
6. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the exciting circuit
(32) operational amplifier N1A, voltage-stabiliser tube V3, V4, resistance R1, R2, R5, R6 and electric capacity C8 are included；
The input positive terminal of the operational amplifier N1A is grounded by resistance R5, and input positive terminal connects itself by resistance R6
Output end；Operational amplifier N1A output end connection voltage-stabiliser tube V3 anodes, and voltage-stabiliser tube V3 negative terminals connection voltage-stabiliser tube V4 negative terminals,
Voltage-stabiliser tube V4 positive ending groundings；Fluxgate magnetic core and electric capacity C8 are parallel between operational amplifier N1A input negative terminal and output end；
Meanwhile, operational amplifier N1A input negative terminal is grounded by resistance R2, and input negative terminal by resistance R1 to filter circuit (31)
Export magnetic flux gate signal.
7. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the power circuit
(33) voltage-regulator diode V1, V2 and current-limiting resistance R3, R7 are included；
The current-limiting resistance R3, voltage-regulator diode V1, voltage-regulator diode V2 and current-limiting resistance R7 are sequentially connected in series, and current-limiting resistance
R3, R7 empty pin connect positive supply, negative supply respectively, and a ground connection is connected in series between voltage-regulator diode V1, V2；Power circuit
(33) voltage from voltage-regulator diode V1 negative terminals and the output of voltage-regulator diode V2 anodes after stable, is supplied to signal conditioning circuit (34)
Electricity.
8. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the signal condition
Circuit (34) includes operational amplifier N2A, N2B, resistance R4, R8, R9, R11~R20, and electric capacity C3, C4, C7, C9, C10；
Described resistance R11, R12 are between zero-regulator resistor, the positive and negative two ends for being serially connected with the output end of power circuit (33), while electric
One end that place connects resistance R13 is connected in series between resistance R11, R12, the resistance R13 other ends are grounded by resistance R14, and
Pass through resistance R8 concatenation operation amplifiers N2B input negative terminal；Operational amplifier N2B input positive terminal is connected to by resistance R4
The fluxgate signal output part of exciting circuit (32)；Resistance R15, R16, R18 are debugging resistance, and resistance R16 and resistance R18 are simultaneously
Connected again with resistance R15 after connection, so latter two series connection end is in parallel with electric capacity C9, and two parallel connected ends are reconnected in operational amplifier
Between N2B input negative terminal and output end；
Described electric capacity C3, C4 are filter capacitor, and wherein one end is respectively connected to operational amplifier N2B power end, the other end
Ground connection；Meanwhile, operational amplifier N2B output end is connected to operational amplifier N2A input positive terminal by resistance R19；Electric capacity
C7 and resistance R20 are parallel between operational amplifier N2A input positive terminal and ground；Operational amplifier N2A input negative terminal passes through
Resistance R9 is grounded, and resistance R17 and electric capacity C10 are parallel between operational amplifier N2A input negative terminal and output end, operation amplifier
The analog voltage signal of device N2A output is the final output of current sensor.
9. a kind of simplex winding Toroidal current sensor as claimed in claim 1, it is characterised in that the magnetic core outer layer
Enamel-covered wire is enclosed in winding 1000~2000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710479003.1A CN107328979A (en) | 2017-06-22 | 2017-06-22 | A kind of simplex winding Toroidal current sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710479003.1A CN107328979A (en) | 2017-06-22 | 2017-06-22 | A kind of simplex winding Toroidal current sensor |
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| CN107328979A true CN107328979A (en) | 2017-11-07 |
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| CN201710479003.1A Pending CN107328979A (en) | 2017-06-22 | 2017-06-22 | A kind of simplex winding Toroidal current sensor |
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| CN109164287A (en) * | 2018-10-08 | 2019-01-08 | 深圳市艾华迪技术有限公司 | A kind of hollow coil AC current 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 |
| CN112379146A (en) * | 2020-10-27 | 2021-02-19 | 威胜集团有限公司 | Current sensor |
| CN114706024A (en) * | 2022-04-01 | 2022-07-05 | 哈尔滨工程大学 | Hybrid phase-locked amplifying circuit suitable for MEMS fluxgate sensor and control method thereof |
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| CN109164287A (en) * | 2018-10-08 | 2019-01-08 | 深圳市艾华迪技术有限公司 | A kind of hollow coil AC current 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 |
| CN112379146A (en) * | 2020-10-27 | 2021-02-19 | 威胜集团有限公司 | Current sensor |
| CN114706024A (en) * | 2022-04-01 | 2022-07-05 | 哈尔滨工程大学 | Hybrid phase-locked amplifying circuit suitable for MEMS fluxgate sensor and control method thereof |
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