CN207488479U - A kind of current transformer detecting system - Google Patents
A kind of current transformer detecting system Download PDFInfo
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- CN207488479U CN207488479U CN201721218971.9U CN201721218971U CN207488479U CN 207488479 U CN207488479 U CN 207488479U CN 201721218971 U CN201721218971 U CN 201721218971U CN 207488479 U CN207488479 U CN 207488479U
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Abstract
A kind of current transformer detecting system, including task management platform, hand-held intelligent terminal and test cell, hand-held intelligent terminal is connected with task management platform GPRS communications, hand-held intelligent terminal is connected with test cell using BlueTooth communications, task management platform is responsible for assigning test assignment and acceptance test result, it is single to test that hand-held intelligent terminal is responsible for transmission test command, it uploads test data and gives task management platform, test cell is responsible for testing, and be transmitted to hand-held intelligent terminal upwards tested mutual inductor.The utility model can realize the long-range test assignment issued to mutual inductor, scene receives and completes test job, task management platform is realized to mutual inductor information centralized management, strengthens the management and control ability to mutual inductor, by using alien frequencies small-signal test method, reduce equipment power dissipation demand, realization is tested using portable device, improves work on the spot efficiency, is controlled by using BlueTooth wireless telecommunications, isolation personnel and tested high-tension apparatus, ensure personal safety.
Description
Technical field：
The utility model is related to a kind of current mutual inductor on site detecting systems, are especially a kind of the portable of real-time management and control
Current transformer detecting system.
Background technology：
Current transformer belongs to as a kind of important measurement instrument and examines measurement instrument as defined in measurement Law by force.With me
State's electric Power Reform deepens continuously, and the management and control mode of electric power measure device to centralized management, develop by real-time Transmission direction.
At present, traditional comparison method equipment and low pressure extrapolation are the main methods that current transformer detection is carried out at scene.Than
Compared with method equipment using up-flow error of measurement principle, when test, needs up-flow source, standard CT, Burden box, tester, high current conducting wire
Etc. equipment.There are the drawbacks such as detection efficiency is low, equipment is more, wiring is complicated, transport is difficult to install, safety is poor.And low pressure is extrapolated
Method is by applying the working condition of small voltage signal imitation current transformer, the relevant physical parameter of measurement current transform er, fortune
The error testing realized to current transformer is calculated with formula.It is more that this method avoids comparison method equipment to a certain extent, connects
The shortcomings of line is complicated.But the problems such as existing equipment is single there are frequency test signal, and transmission control mode is strong to cable dependence,
Cause on-the-spot test safety not high, poor anti jamming capability, the test management and control consequences such as not in time, to realizing electric power measure device
Management and control mode to centralized management, it is unfavorable that develop by real-time Transmission direction.
Utility model content：
The technical problems to be solved in the utility model is to provide a kind of real-time management and control, strong antijamming capability, safe
Current transformer detecting system, the detecting system can remotely issue the test assignment to mutual inductor, and scene receives and completes to test
The management and control ability to mutual inductor information centralized management, strengthened to mutual inductor is realized in work, solves existing equipment antijamming capability
Poor problem, isolation personnel and tested high-tension apparatus, ensure personal safety, and improve Security of test.
The technical solution of the utility model is to provide a kind of current transformer detecting system having following structure,
The detecting system includes task management platform, hand-held intelligent terminal and test cell, wherein：
The task management platform is communicated with hand-held intelligent terminal using GPRS, assigns test assignment list to the hand-held intelligence
Energy terminal, and the test result data transmitted from hand-held intelligent terminal is received, carry out Correlative data analysis and record；
The hand-held intelligent terminal communicates upwards with task management platform, is led to test cell using BlueTooth downwards
News for receiving the test assignment assigned from task management platform, input tested transformer parameter, send test command downwards
To test cell, the tested transformer test data that reception carrys out self-test unit transmission carry out display reading, will test number upwards
According to being above transmitted to task management platform；
The test cell is communicated with hand-held intelligent terminal, performs the test command from hand-held intelligent terminal, control
System output alien frequencies signal, and alien frequencies signal is applied to tested mutual inductor, while acquire first and second electricity of tested current transformer
Pressure, current signal is handled and operation, obtains the parameters such as error, the no-load voltage ratio of tested mutual inductor, and be transmitted to hand-held intelligence upwards
It can terminal.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, test cell may include signal
Processing module, full-wave rectification block, frequency conversion power amplifier module, frequency-selecting and filtering module, signal acquisition module and power module, the letter
Number acquisition module and full-wave rectification block are connect with signal processing module, and the frequency conversion power amplifier module both sides are whole with all-wave respectively
Flow module is connected with frequency-selecting and filtering module, and shown power module is responsible for signal processing module, full-wave rectification block, frequency conversion power amplifier
Module, frequency-selecting and filtering module and signal acquisition module are powered.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, signal processing module can be used
Be signal TMS320F2811DSP chips.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, full-wave rectification block may include
Resistance R51, resistance RY, capacitance C24, capacitance C25 and four diodes D33, D34, D35, D36, four diodes
D33, D34, D35, D36 are interconnected to bridge architecture and, the D33 and D35 in parallel with resistance RY, capacitance C24, capacitance C25
Between and D34 and D36 between respectively have one for the input line that connect with signal processing module, and the resistance RY of parallel connection, electricity
Hold C24 and capacitance C25 connect with resistance R51 export rectified signal enter frequency conversion power amplifier module.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, frequency conversion power amplifier module may include
Capacitance C9, capacitance C5, capacitance C18, capacitance C26, capacitance C6, capacitance C20, capacitance C12, capacitance C35, capacitance C36, capacitance
C37, capacitance C38, capacitance C27, capacitance C28, capacitance C34, capacitance C33, capacitance C31, capacitance C32, resistance R14, resistance R020,
Resistance R13, resistance R36, resistance R37, resistance R35, resistance R34, inductance L1, inductance L2, inductance L3, inductance L4, inductance L5, electricity
Feel L6, MAX4080TAUA current sense amplifier and four STP22NF03L field-effect tube V7, V8, V11 and V12, it is described
Capacitance C9, capacitance C5 and resistance R14 are parallel with one another, the capacitance C6, capacitance C20, capacitance C12, capacitance C35 and capacitance C36 phases
It is mutually in parallel, one end of the resistance R020 simultaneously with one end of resistance R14 and the RS+ of MAX4080TAUA current sense amplifiers
Foot connects, and the other end of resistance R020 connects simultaneously with the RS- feet of one end of capacitance C6 and MAX4080TAUA current sense amplifiers
It connects, one end of the capacitance C18 and the VCC feet of MAX4080TAUA current sense amplifiers connect external VCC, capacitance C18 simultaneously
The other end and the GND feet of MAX4080TAUA current sense amplifiers be grounded simultaneously, one end of the resistance R13 with
The OUT feet connection of MAX4080TAUA current sense amplifiers, the other end are connect with one end of capacitance C26, and capacitance C26's is another
End ground connection, the drain electrode of STP22NF03L the field-effect tube V12 and V8 are connect simultaneously with one end of capacitance C36, described
The source electrode of STP22NF03L field-effect tube V11 and V7 are connect simultaneously with the other end of capacitance C36, STP22NF03L field-effect tube
The source electrode of V12 is connect with the drain electrode of STP22NF03L field-effect tube V11, the source electrode of STP22NF03L field-effect tube V8 with
The drain electrode connection of STP22NF03L field-effect tube V7, the resistance R36 and capacitance C37 series connection and it is connected to STP22NF03L
Between the drain electrode of effect pipe V11 and source electrode, the resistance R37 and capacitance C38 are connected on the leakage of STP22NF03L field-effect tube V7
Between pole and source electrode, the inductance L4, inductance L3, inductance L6 be connected on the source electrode of STP22NF03L field-effect tube V12 with
Between VOUTA output terminals, the inductance L2, inductance L1, inductance L5 be connected on the source electrode of STP22NF03L field-effect tube V8 with
Between VOUTN output terminals, capacitance 27 and capacitance 28 are connected in parallel in the centre of inductance L3 and inductance L4 and inductance L1 and inductance L2
Between between, resistance R35 and capacitance C33 are connected on one end of inductance L1 and one end of capacitance C36, capacitance C34 and resistance R35 and electricity
It is in parallel to hold C33, resistance R34 and capacitance C32 are connected on one end of inductance L6 and one end of capacitance C36, capacitance C31 and resistance R34
With capacitance C32 parallel connections.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, frequency-selecting and filtering module may include
Polar capacitor C35, polar capacitor C33A, polar capacitor C30, polar capacitor C26, polar capacitor C27, polar capacitor C29, capacitance
C34, capacitance C33B, capacitance C31, capacitance C28, inductance L7, inductance L8 and TMR0512 chip, the polar capacitor C35 and electricity
Hold C34 to be connected in parallel, capacitance C33B and polar capacitor C33A be connected in parallel TMR0512 chips+VIN feet and-VIN feet it
Between, polar capacitor C30, polar capacitor C26, capacitance C31 be connected in parallel+VOUT the feet of TMR0512 chips and-VOUT feet it
Between, polar capacitor C27, polar capacitor C29, capacitance C28 are connected in parallel, inductance L7 one end connection VCC, the connection of the inductance L7 other ends
+ VIN the feet of TMR0512 chips, inductance L8 one end connect the+VOUT feet of TMR0512 chips, inductance L8 other ends connection polarity electricity
Hold the anode of C27.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, signal sampling module may include
Resistance R59, capacitance C59, diode D4, diode D5 and A/D chip, resistance R59 one end are connect with A/D chip, capacitance C59 mono-
End is connected to the centre of resistance R59 and A/D chip, and diode D4 and diode D5 are connected between AVDD ends and AGND ends, electricity
Resistance R59 and A/D chip connecting line and the connecting line of diode D4 and diode D5 connect.
Preferably, a kind of current transformer detecting system described in the utility model, wherein, A/D chip can be AD7600 cores
Piece.
After more than structure, the utility model has the advantages that：
1st, the test assignment of current transformer and the tested transformer test number of management are remotely issued by task management platform
According to, and it is expansible docked with national grid SG186 or MIS marketing system, effectively increase the management and control ability to current transformer,
It realizes and long-term follow monitoring is carried out to tested mutual inductor, note abnormalities and handle in time.
2nd, using alien frequencies small-signal signal testing technology, equipment power dissipation demand when reducing test realizes portable devices formula, solution
Determined comparative method for measuring mutual inductor when the drawbacks such as equipment is more, wiring complexity, transport difficult, significantly reduce the labor of work on the spot
Fatigue resistance improves efficiency.
3rd, test is remotely controlled to mutual inductor at the scene by using hand-held intelligent terminal, personnel and high-tension apparatus is isolated,
Ensure the personal safety of tester.
Description of the drawings：
Fig. 1 is a kind of structure diagram of current transformer detecting system of the utility model；
Fig. 2 is the structure diagram of test cell in the utility model；
Fig. 3 is the electrical block diagram of full-wave rectification block in the utility model；
Fig. 4 is the electrical block diagram of frequency conversion power amplifier module in the utility model；
Fig. 5 is the electrical block diagram of frequency-selecting and filtering module in the utility model；
Fig. 6 is the electrical block diagram of signal sampling module in the utility model.
Specific embodiment：
To the utility model, a kind of current transformer detecting system is made furtherly in the following with reference to the drawings and specific embodiments
It is bright：
As shown in Figure 1, a kind of current transformer detecting system of the utility model includes task management platform 100, hand-held intelligence
Energy terminal 200 and test cell 300, wherein,
Task management platform 100 is connected with hand-held intelligent terminal 200 using GPRS communications, and hand-held intelligent terminal 200 is with surveying
It tries unit 300 and uses BlueTooth communication links, two kinds of communication modes can automatically confirm that whether communication connects.Task management
Platform 100 assigns test assignment list to hand-held intelligent terminal 200, and receives the test knot transmitted from hand-held intelligent terminal 200
Fruit data carry out Correlative data analysis and record, expansible to be docked with national grid SG186 or MIS marketing system, improve
To the management and control ability of mutual inductor.Task management platform 100 is using WINDOWS systems.
Hand-held intelligent terminal 200 communicates upwards with task management platform 100, is used with test cell 300 downwards
BlueTooth is communicated, and for the test assignment that scene reception is assigned from task management platform 100, inputs tested mutual inductor ginseng
Number, and exact p-value unit 300 and tested mutual inductor whether correct wiring, then send test command downwards to test cell
300, reception carrys out the tested transformer test data that self-test unit 300 transmits and carries out display reading, upwards will be in test data
It is transmitted to task management platform 100.Hand-held intelligent terminal 200 is using WINDOWS systems.
Test cell 300 is communicated with hand-held intelligent terminal 200, performs the test life from hand-held intelligent terminal 200
Enable, control output alien frequencies signal, and alien frequencies signal applied to tested mutual inductor, at the same acquire tested current transformer one,
Secondary voltage, current signal are handled and operation, obtains the parameters such as error, the no-load voltage ratio of tested mutual inductor, and be transmitted to upwards
Hand-held intelligent terminal 200.Test cell 300 uses 2811 dsp processors of TMS.
As shown in Fig. 2, test cell 300 includes signal processing module 301, full-wave rectification block 302, frequency conversion power amplifier module
303rd, frequency-selecting and filtering module 304, signal acquisition module 305 and power module 306, signal acquisition module 305 and full-wave rectification mould
Block 302 is connect with signal processing module 301, and 303 both sides of frequency conversion power amplifier module are filtered respectively with full-wave rectification block 302 and frequency-selecting
Wave module 304 connects, and power module 306 is responsible for powering to test cell 300, i.e., power module 306 is responsible for signal processing mould
Block 301, full-wave rectification block 302, frequency conversion power amplifier module 303, frequency-selecting and filtering module 304 and signal acquisition module 305 carry out
Power supply.
After test cell 300 receives the order of hand-held intelligent terminal 200, the default letter of the control output of signal processing module 301
Number, test signal is input to frequency conversion power amplifier module 303 after 302 rectification of full-wave rectification block and amplifies, then by frequency-selecting and filtering module
After 304 inversions processing, it is applied to tested mutual inductor terminal.Meanwhile 305 automatic collection of signal acquisition module be tested mutual inductor one,
Voltage, the current signal of secondary side are uploaded to signal processing module 301 and carry out processing operation to data, as a result to hand-held intelligent
Terminal 200 uploads, and completes test.The signal processing module 301 is using the signal produced using TI companies
TMS320F2811 dsp chips.The chip is 32-bit number signal processor, and process performance is up to 150MIPS, every instruction week
Phase 6.67ns, signal processing operation efficiency are high.
As shown in figure 3, full-wave rectification block 302 includes resistance R51, resistance RY, capacitance C24, capacitance C25 and four two
Pole pipe D33, D34, D35, D36, described four diodes D33, D34, D35, D36 are interconnected to bridge architecture and and resistance
RY, capacitance C24, capacitance C25 are in parallel, respectively have one to be used for and signal processing between the D33 and D35 and between D34 and D36
The input line that module 301 connects, and resistance RY, capacitance C24 and capacitance C25 in parallel connect after exporting rectification with resistance R51 and believe
Number enter frequency conversion power amplifier module.
As shown in figure 4, frequency conversion power amplifier module 303 includes capacitance C9, capacitance C5, capacitance C18, capacitance C26, capacitance C6, electricity
Hold C20, capacitance C12, capacitance C35, capacitance C36, capacitance C37, capacitance C38, capacitance C27, capacitance C28, capacitance C34, capacitance
C33, capacitance C31, capacitance C32, resistance R14, resistance R020, resistance R13, resistance R36, resistance R37, resistance R35, resistance R34,
Inductance L1, inductance L2, inductance L3, inductance L4, inductance L5, inductance L6, MAX4080TAUA current sense amplifier and four
STP22NF03L field-effect tube V7, V8, V11 and V12, the capacitance C9, capacitance C5 and resistance R14 are parallel with one another, the capacitance
C6, capacitance C20, capacitance C12, capacitance C35 and capacitance C36 are parallel with one another, one end of the resistance R020 simultaneously with resistance R14
One end connected with the RS+ feet of MAX4080TAUA current sense amplifiers, the other end of resistance R020 simultaneously with capacitance C6 one
End is connected with the RS- feet of MAX4080TAUA current sense amplifiers, one end of the capacitance C18 and the inspection of MAX4080TAUA electric currents
The VCC feet of amplifier connect external VCC simultaneously, the other end of capacitance C18 and MAX4080TAUA current sense amplifiers
GND feet are grounded simultaneously, and one end of the resistance R13 is connect with the OUT feet of MAX4080TAUA current sense amplifiers, the other end
It is connect with one end of capacitance C26, the other end ground connection of capacitance C26, the drain electrode of STP22NF03L the field-effect tube V12 and V8 are same
When connect with one end of capacitance C36, the source electrode of STP22NF03L the field-effect tube V11 and V7 is another with capacitance C36 simultaneously
End connection, the source electrode of STP22NF03L field-effect tube V12 are connect with the drain electrode of STP22NF03L field-effect tube V11,
The source electrode of STP22NF03L field-effect tube V8 is connect with the drain electrode of STP22NF03L field-effect tube V7, the resistance R36 and capacitance
C37 connects and is connected between drain electrode and the source electrode of STP22NF03L field-effect tube V11, the resistance R37 and capacitance C38 series connection
Between the drain electrode of STP22NF03L field-effect tube V7 and source electrode, the inductance L4, inductance L3, inductance L6 are connected on
Between the source electrode of STP22NF03L field-effect tube V12 and VOUTA output terminals, the inductance L2, inductance L1, inductance L5 are connected on
Between the source electrode of STP22NF03L field-effect tube V8 and VOUTN output terminals, capacitance 27 and capacitance 28 are connected in parallel on inductance L3 and inductance
Between the centre of L4 and the centre of inductance L1 and inductance L2, resistance R35 and capacitance C33 are connected on one end and the capacitance of inductance L1
One end of C36, capacitance C34 is in parallel with resistance R35 and capacitance C33, resistance R34 and capacitance C32 be connected on one end of inductance L6 with
One end of capacitance C36, capacitance C31 are in parallel with resistance R34 and capacitance C32.
Test signal after rectified is first by entering MAX4080TAUA electric currents after capacitance C5, capacitance C9, resistance R14 parallel connections
Amplifier is detected, High frequency filter is carried out, then by 4 STP22NF03L through five capacitance parallel connections of C6, C20, C12, C35, C36
Effect pipe V7, V8, V11, V12 are amplified, STP22NF03L field-effect tube V11 and V12 and STP22NF03L field-effect tube
Respectively draw a connector output signal in the centre of V7 and V8.It connects after the output of V11 and V12 connectors with inductance L4, STP22NF03L
It connects after the output of field-effect tube V7 and V8 connector with inductance L2, capacitance C27, C28 are in parallel, and last test signal is through common mode inductance L3
After filtering out High-frequency Interference, the amplified test signal of output of connecting respectively with inductance L5, L6.
As shown in figure 5, frequency-selecting and filtering module 304 includes polar capacitor C35, polar capacitor C33A, polar capacitor C30, pole
Property capacitance C26, polar capacitor C27, polar capacitor C29, capacitance C34, capacitance C33B, capacitance C31, capacitance C28, inductance L7, electricity
Feel L8 and TMR0512 chips, the polar capacitor C35 and capacitance C34 are connected in parallel, capacitance C33B and polar capacitor C33A
It is connected in parallel between+VIN the feet of TMR0512 chips and-VIN feet, polar capacitor C30, polar capacitor C26, capacitance C31 are in parallel
It is connected between+VOUT the feet of TMR0512 chips and-VOUT feet, polar capacitor C27, polar capacitor C29, capacitance C28 parallel connections connect
It connects, inductance L7 one end connection VCC, the inductance L7 other ends connect the+VIN feet of TMR0512 chips, the connection of inductance L8 one end
+ VOUT the feet of TMR0512 chips, the anode of inductance L8 other ends connection polar capacitor C27.
It is in parallel defeated with polar capacitor C33A and C33B again after connecting after polar capacitor C35 and capacitance C34 parallel connections with inductance L8
Enter to carry out in TMR0512 to convert between direct current, output elder generation and the L1 that connects after C30, C31, C26 parallel connection after being converted by chip, then with
C27, C29, C28 Parallel opertation signal.The effect of this filter circuit is only to allow the signal in some pass band
Pass through, and signal lower than passband lower frequency limit and higher than upper limiting frequency is decayed or inhibited.Finally again after inversion
Ac voltage signal in the range of 1~55Hz of output is applied to tested mutual inductor and is tested.
As shown in fig. 6, signal sampling module 305 includes resistance R59, capacitance C59, diode D4, diode D5 and AD core
Piece, resistance R59 one end are connect with A/D chip, and capacitance C59 one end is connected to the centre of resistance R59 and A/D chip, diode D4 and
Diode D5 is connected between AVDD ends and AGND ends, and resistance R59 and A/D chip connecting line are with diode D4's and diode D5
Connecting line connects.
The signal of feedback enters from ADCINB0, pulls down and is grounded by resistance R59, capacitance C59.Diode D4 and diode
D5 reversely connects, i.e. the cathode of D4 connection AVDD, D5 anodes connection AGND, and anode is directed toward cathode, finally by ADCB0 export into
Enter A/D chip.Thus the analog signal of feedback is made to pass through ADC and is converted to digital signal.Signal acquisition module 305 is using AD
The AD7600 chips of company are sampled.The chip possesses 90db Signal-to-Noise-and-distortion ratios, total harmonic distortion during 10KHz for 96db and
16 DC precisions.
Embodiment described above is only that the preferred embodiment of the utility model is described, not new to this practicality
The range of type is defined, and under the premise of the spirit of the design of the utility model is not departed from, those of ordinary skill in the art are to this reality
The various modifications made with novel technical solution and improvement should all fall into the protection model that the utility model claims book determines
In enclosing.
Claims (8)
1. a kind of current transformer detecting system, it is characterised in that：It is whole that the detecting system includes task management platform, hand-held intelligent
End and test cell, wherein：
The task management platform is communicated with hand-held intelligent terminal using GPRS, assigns test assignment list to hand-held intelligent end
End, and the test result data transmitted from hand-held intelligent terminal is received, carry out Correlative data analysis and record；
The hand-held intelligent terminal communicates upwards with task management platform, is communicated with test cell using BlueTooth downwards, uses
In the test assignment that reception is assigned from task management platform, the tested transformer parameter of input sends downwards test command to survey
Unit is tried, the tested transformer test data that reception carrys out self-test unit transmission carry out display reading, upwards will be in test data
It is transmitted to task management platform；
The test cell is communicated with hand-held intelligent terminal, performs the test command from hand-held intelligent terminal, and control is defeated
Go out alien frequencies signal, and alien frequencies signal applied to tested mutual inductor, at the same acquire tested current transformer first and second voltage,
Current signal is handled and operation, obtains error, the no-load voltage ratio parameter of tested mutual inductor, and is transmitted to hand-held intelligent end upwards
End.
2. a kind of current transformer detecting system according to claim 1, it is characterised in that：The test cell includes letter
Number processing module, full-wave rectification block, frequency conversion power amplifier module, frequency-selecting and filtering module, signal acquisition module and power module, it is described
Signal acquisition module and full-wave rectification block are connect with signal processing module, the frequency conversion power amplifier module both sides respectively with all-wave
Rectification module is connected with frequency-selecting and filtering module, and shown power module is responsible for signal processing module, full-wave rectification block, frequency conversion work(
Amplification module, frequency-selecting and filtering module and signal acquisition module are powered.
3. a kind of current transformer detecting system according to claim 2, it is characterised in that：The signal processing module is adopted
It is signal TMS320F2811DSP chips.
4. a kind of current transformer detecting system according to claim 2, it is characterised in that：The full-wave rectification block packet
Include resistance R51, resistance RY, capacitance C24, capacitance C25 and four diodes D33, D34, D35, D36, four diodes
D33, D34, D35, D36 are interconnected to bridge architecture and, the D33 and D35 in parallel with resistance RY, capacitance C24, capacitance C25
Between and D34 and D36 between respectively have one for the input line that connect with signal processing module, and the resistance RY of parallel connection, electricity
Hold C24 and capacitance C25 connect with resistance R51 export rectified signal enter frequency conversion power amplifier module.
5. a kind of current transformer detecting system according to claim 2, it is characterised in that：The frequency conversion power amplifier module packet
Include capacitance C9, capacitance C5, capacitance C18, capacitance C26, capacitance C6, capacitance C20, capacitance C12, capacitance C35, capacitance C36, capacitance
C37, capacitance C38, capacitance C27, capacitance C28, capacitance C34, capacitance C33, capacitance C31, capacitance C32, resistance R14, resistance R020,
Resistance R13, resistance R36, resistance R37, resistance R35, resistance R34, inductance L1, inductance L2, inductance L3, inductance L4, inductance L5, electricity
Feel L6, MAX4080TAUA current sense amplifier and four STP22NF03L field-effect tube V7, V8, V11 and V12, the electricity
Appearance C9, capacitance C5 and resistance R14 are parallel with one another, and the capacitance C6, capacitance C20, capacitance C12, capacitance C35 and capacitance C36 are mutual
Parallel connection, one end of the resistance R020 simultaneously with one end of resistance R14 and the RS+ feet of MAX4080TAUA current sense amplifiers
Connection, the other end of resistance R020 connect simultaneously with the RS- feet of one end of capacitance C6 and MAX4080TAUA current sense amplifiers
It connects, one end of the capacitance C18 and the VCC feet of MAX4080TAUA current sense amplifiers connect external VCC, capacitance C18 simultaneously
The other end and the GND feet of MAX4080TAUA current sense amplifiers be grounded simultaneously, one end of the resistance R13 with
The OUT feet connection of MAX4080TAUA current sense amplifiers, the other end are connect with one end of capacitance C26, and capacitance C26's is another
End ground connection, the drain electrode of STP22NF03L the field-effect tube V12 and V8 are connect simultaneously with one end of capacitance C36, described
The source electrode of STP22NF03L field-effect tube V11 and V7 are connect simultaneously with the other end of capacitance C36, STP22NF03L field-effect tube
The source electrode of V12 is connect with the drain electrode of STP22NF03L field-effect tube V11, the source electrode of STP22NF03L field-effect tube V8 with
The drain electrode connection of STP22NF03L field-effect tube V7, the resistance R36 and capacitance C37 series connection and it is connected to STP22NF03L effects
Should pipe V11 drain electrode and source electrode between, the resistance R37 and capacitance C38 are connected on the drain electrode of STP22NF03L field-effect tube V7
Between source electrode, the inductance L4, inductance L3, inductance L6 be connected on STP22NF03L field-effect tube V12 source electrode and VOUTA it is defeated
Between outlet, the inductance L2, inductance L1, inductance L5 are connected on the source electrode of STP22NF03L field-effect tube V8 and VOUTN is exported
Between end, capacitance 27 and capacitance 28 are connected in parallel between the centre of inductance L3 and inductance L4 and the centre of inductance L1 and inductance L2, electricity
Resistance R35 and capacitance C33 is connected on one end of inductance L1 and one end of capacitance C36, and capacitance C34 and resistance R35 and capacitance C33 is simultaneously
Connection, resistance R34 and capacitance C32 are connected on one end of inductance L6 and one end of capacitance C36, capacitance C31 and resistance R34 and capacitance
C32 is in parallel.
6. a kind of current transformer detecting system according to claim 2, it is characterised in that：The frequency-selecting and filtering module packet
Include polar capacitor C35, polar capacitor C33A, polar capacitor C30, polar capacitor C26, polar capacitor C27, polar capacitor C29, electricity
Hold C34, capacitance C33B, capacitance C31, capacitance C28, inductance L7, inductance L8 and TMR0512 chip, the polar capacitor C35 and
Capacitance C34 is connected in parallel, and capacitance C33B and polar capacitor C33A are connected in the+VIN feet of TMR0512 chips and-VIN feet in parallel
Between, polar capacitor C30, polar capacitor C26, capacitance C31 be connected in parallel+VOUT the feet of TMR0512 chips and-VOUT feet it
Between, polar capacitor C27, polar capacitor C29, capacitance C28 are connected in parallel, inductance L7 one end connection VCC, the connection of the inductance L7 other ends
+ VIN the feet of TMR0512 chips, inductance L8 one end connect the+VOUT feet of TMR0512 chips, inductance L8 other ends connection polarity electricity
Hold the anode of C27.
7. a kind of current transformer detecting system according to claim 2, it is characterised in that：The signal sampling module packet
Resistance R59, capacitance C59, diode D4, diode D5 and A/D chip are included, resistance R59 one end is connect with A/D chip, capacitance C59 mono-
End is connected to the centre of resistance R59 and A/D chip, and diode D4 and diode D5 are connected between AVDD ends and AGND ends, resistance
R59 and A/D chip connecting line and the connecting line of diode D4 and diode D5 connect.
8. a kind of current transformer detecting system according to claim 7, it is characterised in that：The A/D chip is AD7600
Chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721218971.9U CN207488479U (en) | 2017-09-21 | 2017-09-21 | A kind of current transformer detecting system |
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| CN201721218971.9U CN207488479U (en) | 2017-09-21 | 2017-09-21 | A kind of current transformer detecting system |
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| CN207488479U true CN207488479U (en) | 2018-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
| CN107450042B (en) * | 2017-09-21 | 2023-07-04 | 国家电网公司 | Current transformer detecting system |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180612 Effective date of abandoning: 20230704 |