CN103941181B - Test device for acquiring on-off state of thyristor impulse power switch assembly - Google Patents
Test device for acquiring on-off state of thyristor impulse power switch assembly Download PDFInfo
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- CN103941181B CN103941181B CN201410138913.XA CN201410138913A CN103941181B CN 103941181 B CN103941181 B CN 103941181B CN 201410138913 A CN201410138913 A CN 201410138913A CN 103941181 B CN103941181 B CN 103941181B
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Abstract
The invention provides a test device for acquiring the on-off state of a thyristor impulse power switch assembly. The test device comprises a current sensor, a preprocessing circuit, a constant current source conversion circuit, a sampling resistor, a shaping and comparing circuit, a data collector, an electro-optic conversion circuit, a photovoltaic conversion circuit and a control module. The current sensor is arranged in a resistance-capacitance absorption circuit of a thyristor assembly in a sleeved mode. The input end of the preprocessing circuit is connected with the current sensor through a first double-core shielding double-twisted cable. The input end of the constant current source conversion circuit is connected with the output end of the preprocessing circuit. The input end of the shaping and comparing circuit is connected with the two ends of the sampling resistor. The input end of the data collector is connected with the two ends of the sampling resistor. The input end of the electro-optic conversion circuit is connected with the output end of the shaping and comparing circuit. The input end of the photovoltaic conversion circuit is connected with the output end of the electro-optic conversion circuit through a cable. The control module is connected with the output end of the photovoltaic conversion circuit. According to the test device, the work state of the impulse power switch assembly can be monitored fast, reliably and safely, state signals can be transmitted in a long distance, and the test device can adapt to a strong electromagnetic environment occasion.
Description
Technical field
The present invention relates to electron electric power technical field, component open-closed particularly to a kind of acquisition IGCT pulse power switch
The test device of state.
Background technology
At present Power Electronic Technique has had evolved to very high level, high-voltage and high-power power electronic device, for example
Igbt (insulated gate bipolar transistor, igbt), power mosfet (metal-
Oxide-semiconductor field-effect transistor, metal oxide layer semiconductcor field effect transisto), gto
(gate turn-off thyristor, gate level turn-off thyristor), IGCT scr (silicon controlled rectifier (SCR)), igct
(intergrated gate commutated thyristors, integrated gate commutated thyristor), magt (control of mos gate pole-
IGCT) and iegt (injection enhanced gate transistor, electron injection enhancement gate transistors) is all
Succeed in developing and a large amount of through engineering approaches has used, further promoted the development of Pulse Power Techniques.In view of thyristor device has
Voltage is high, electric current is big and high reliability, its be uniquely can with do not control the element that type device compares favourably.At present it by
As pulse power switch, it is widely used in the new ideas such as high energy weapon, electromagnetic launch system, simulated-nuclear explosion switching device military
In device and new high-tech experimental provision.
Press-fited back-to-back using two identical IGCTs and serve as pulse power switch assembly (hereinafter referred to as thyristor groups
Part), due to running live, generally more than hundreds of meters apart from each other with control centre.Therefore, this special running environment is to break-make
The sensing head of state-detection and its subsequent processor require extremely harshness, including following two aspects:
(1) due to during IGCT component operation voltage be up to several thousand volts it is desirable to detection IGCT assembly on off operating mode
The insulating properties of sensing head must be up to tens of kilovolts；
(2) due to during IGCT component operation electric current be up to tens of kiloamperes it is desirable to detection IGCT assembly on off operating mode
And its subsequent processor must have the ability of good anti-strong electromagnetic.
Research shows, the condition making thyristor switch and its element turns is that IGCT bears positive anode (a) voltage, and
Apply trigger pulse electric current, i.e. voltage uak between anode and negative electrode (k) > voltage ugk between 0 and gate pole and negative electrode in gate pole (g)
>0.A large amount of engineering practices show, when serving as pulse power switch assembly using IGCT, because driving circuit fault causes brilliant lock
The open fault that tube assembly is not turned on, or due to for a long time lead to heavy current and cross thermal breakdown cause IGCT assembly lead directly to
Short trouble, in addition, is also at least partially due to over-voltage breakdown and leads to the straight-through short trouble of IGCT assembly.This two
Plant fault and all will directly affect the reliability and security of pulse power switch assembly operating.Therefore, in real time, accurately and quickly supervise
Survey switching switch module break-make running status, to guarantee it can safe and reliable and healthy operation most important.
Content of the invention
The purpose of the present invention is intended at least solve one of described technological deficiency.
For this reason, it is an object of the invention to proposing a kind of test obtaining the component open-closed state of IGCT pulse power switch
Device, this device can quickly, the working condition of reliability and safety monitoring pulse power switch assembly, can long-distance transmissions shape
State signal is moreover it is possible to adapt to strong electromagnetic environment occasion.
To achieve these goals, embodiments of the invention provide a kind of acquisition IGCT pulse power switch component open-closed
The test device of state, comprising: current sensor, described current sensor is sheathed on the resistance-capacitance absorption loop of IGCT assembly
In, the secondary wiring terminals of described current sensor are respectively connecting to the two ends of terminal resistance；Pretreatment circuit, described pretreatment
The input of circuit is connected with the secondary wiring terminals of described current sensor by the first twin-core Shielded Twisted Pair cable, described pre-
Process circuit is used for receiving the terminal voltage signal of described terminal resistance and described terminal voltage signal being pre-processed, wherein, institute
The terminal voltage signal stating terminal resistance is used for characterizing the on off operating mode of IGCT pulse power switch assembly；Constant-current source conversion electricity
Road, the input of described constant current power-switching circuit is connected with the output end of described pretreatment circuit, and the conversion of described constant-current source
The input that the output end of circuit shields twisted wire cable with the second twin-core is connected, and described constant current power-switching circuit is used for for reception
Represent the terminal voltage signal of the terminal resistance of on off operating mode of IGCT pulse power switch assembly, and by described terminal voltage signal
Be converted to current signal, and by described current signal transfer to described second twin-core shielding twisted wire cable；Sampling resistor, described
The output end that the two ends of sampling resistor shield twisted wire with described second twin-core respectively is connected, for receiving described second twin-core shielding
The current signal of twisted wire, and generate terminal voltage signal at the two ends of described sampling resistor；Shaping and comparison circuit, described shaping with
The input of comparison circuit is connected with the two ends of described sampling resistor, for receiving the terminal voltage signal of described sampling resistor, and
Terminal voltage signal according to described sampling resistor obtains the height electricity of the on off operating mode characterizing IGCT pulse power switch assembly
Ordinary mail number；Data acquisition unit, the input of described data acquisition unit is connected with the two ends of described sampling resistor, described for receiving
The terminal voltage signal of sampling resistor obtains the analog quantity of the on off operating mode of IGCT pulse power switch assembly with Real-time Collection；Electricity
Light change-over circuit, the input of described electro-optical conversion circuit is connected with the output end of comparison circuit with described shaping, in the future
Be converted to light pulse signal from the level signal of described shaping and comparison circuit；Photoelectric switching circuit, described photoelectric switching circuit
Input be connected with the output end of described electro-optical conversion circuit by optical cable, for obtaining described light pulse signal conversion process
Voltage signal to the on off operating mode for characterizing IGCT pulse power switch assembly；Control module, described control module with
The output end of described photoelectric switching circuit is connected, for according to receiving for characterizing IGCT pulse power switch assembly
The voltage signal of on off operating mode detects the on off operating mode of IGCT pulse power switch assembly.
In one embodiment of the invention, described current sensor is High-Voltage Insulation type current sensor, wherein, described
Current sensor includes: current sensor coil；Shielding overcoat, positioned at the outer layer of described current sensor coil, described electric current
The input terminal of sensor and outlet terminal are drawn by described first twin-core Shielded Twisted Pair cable；Insulating coating, described insulation
Overcoat is located at the outer layer of described shielding overcoat, and is inoculated with fluid sealant in described insulating coating.
In yet another embodiment of the present invention, described pretreatment circuit includes: instrument operational amplifier, described instrument fortune
Calculate and be parallel with first resistor between the first pin of amplifier and the 8th pin, the second pin is connected with one end of second resistance,
The other end of described second resistance is connected with one end of described terminal resistance, and three-prong is connected with one end of 3rd resistor, institute
The other end stating 3rd resistor is connected with the other end of described terminal resistance, and the 4th pin connects negative supply, the 5th pin ground connection, the
Six pins are connected with one end of the 4th resistance, another termination output port of described 4th resistance, and the 7th pin connects positive supply.
In yet another embodiment of the present invention, described constant current power-switching circuit includes: the first operational amplifier, and described
The electrode input end of one operational amplifier is connected with one end of the 5th resistance, the other end of described 5th resistance and described pretreatment
The output port of circuit is connected, and the negative input of described first operational amplifier is connected with one end of the 6th resistance, and described the
The other end of six resistance is connected with the output port of described pretreatment circuit；Follower, the input of described follower with described
The output end of the first operational amplifier is connected；Second operational amplifier, the electrode input end of described second operational amplifier passes through
Resistance is connected with the output end of described follower, negative input and output end short circuit, and output end connects to described first
The electrode input end of operational amplifier, is parallel with the first electricity between the electrode input end of described second operational amplifier and signal ground
Hold, and described second twin-core of two terminations of the first electric capacity shields the input of twisted wire, described second twin-core shields the output of twisted wire
Terminate described sampling resistor.
In one embodiment of the invention, described constant current power-switching circuit includes: difference amplifier chip, described difference fortune
Put chip second is connected with the output port of described pretreatment circuit with three-prong；Follower, the input of described follower
End is connected with the output end of described difference amplifier chip；Second operational amplifier, the electrode input end of the second operational amplifier leads to
The output end crossing resistance with described follower is connected, negative input and output end short circuit, and output end connects to described difference
Divide the first pin of amplifier chip, between the electrode input end of described second operational amplifier and signal ground, be parallel with the first electricity
Hold, and described second twin-core of two terminations of the first electric capacity shields the input of twisted wire, described second twin-core shields the output of twisted wire
Terminate described sampling resistor.
In yet another embodiment of the present invention, described shaping and comparison circuit include: diode, described diode anode
It is connected with one end of described sampling resistor by resistance, negative electrode is connected with electrochemical capacitor positive pole, the negative pole of described electrochemical capacitor connects
Ground, described electrochemical capacitor is in parallel with the second electric capacity；First comparator, the electrode input end of described first comparator pass through resistance with
The electrode input end of described electrochemical capacitor is connected, and the electrode input end of described first comparator passes through resistance and the first ratio further
It is connected compared with the output end of device；Second comparator, described second comparator negative input passes through resistance and described electrochemical capacitor
Positive terminal is connected, and the electrode input end of described second comparator is connected with the output end of described second comparator by resistance, the
The output end of one comparator and the second comparator is connected, and output characterizes the on off operating mode of IGCT pulse power switch assembly
Low and high level signal.
In yet another embodiment of the present invention, described electro-optical conversion circuit includes: with gate drive circuit, described and door drive
First pin of dynamic circuit connects the low and high level signal of the on off operating mode characterizing IGCT pulse power switch assembly, the second pin
With the first pin short circuit；Send optical fiber head, described transmission optical fiber head is connected with the three-prong of gate drive circuit with described, by height
Low level signal is converted to optical signal, and is sent to described photoelectric switching circuit by optical cable.
In one embodiment of the invention, described photoelectric switching circuit includes: reception optical fiber head, described reception optical fiber head
Be connected with described optical cable, for receiving optical signal, and by described optical signal be converted to corresponding sign IGCT pulse power open
Close the voltage signal of the on off operating mode of assembly.
In yet another embodiment of the present invention, described optical cable is single single-mode fiber or single multimode fibre.
The test device of the acquisition component open-closed state of IGCT pulse power switch according to embodiments of the present invention, electric current passes
Sense head adopts insulated type structure, by current sensing head heeling-in in the sheath with high voltage isolation capability, using constant-current source transmission
The voltage signal of on off operating mode characterizing IGCT pulse power switch assembly is it is convenient to detect IGCT assembly operating
Open fault or the voltage signal of short trouble, and this voltage signal is converted to current signal, can be used for long-distance transmissions,
Status information can also be uploaded in real time related host computer or CCU via optical cable, for participating in block thyristor groups
The important operations such as part driving pulse provide control instruction, solve and work in IGCT pulse power switch group under forceful electric power magnetic environment
The technical barrier of the remote state-detection of part is it is ensured that pulse power switch assembly being capable of healthy, safe and reliable operation.
The aspect that the present invention adds and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein:
Fig. 1 is the test device of the acquisition component open-closed state of IGCT pulse power switch according to the embodiment of the present invention
Structural representation；
Fig. 2 is the High-Voltage Insulation type structural representation of the current sensor according to the embodiment of the present invention；
Fig. 3 is the schematic diagram of the pretreatment circuit according to the embodiment of the present invention；
Fig. 4 is the schematic diagram of the constant current power-switching circuit according to one embodiment of the invention；
Fig. 5 is the schematic diagram of the constant current power-switching circuit according to another embodiment of the present invention；
Fig. 6 is the schematic diagram of the shaping according to the embodiment of the present invention and comparison circuit；
Fig. 7 is the schematic diagram of the electro-optical conversion circuit according to the embodiment of the present invention；
Fig. 8 is the schematic diagram of the photoelectric switching circuit according to the embodiment of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；It can be machine
Tool connects or electrically connects；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part.For the ordinary skill in the art, above-mentioned term can be understood as the case may be at this
Concrete meaning in bright.
Fig. 1 is the test device of the acquisition component open-closed state of IGCT pulse power switch according to the embodiment of the present invention
Structural representation.
As shown in figure 1, the test device of the acquisition component open-closed state of IGCT pulse power switch of the embodiment of the present invention,
Including: current sensor 2, the first twin-core Shielded Twisted Pair cable 3, pretreatment circuit 4, constant current power-switching circuit 5, the second twin-core screen
Cover twisted pair wire 6, shaping and comparison circuit 7, data acquisition unit 12, electro-optical conversion circuit 8, optical cable 9, photoelectric switching circuit 10 with
And control module 11.The present invention quickly, reliably can monitor the on off operating mode of pulse power switch assembly it is ensured that it is each time
During operation, being capable of healthy, safety and reliably working.
Whole circuit structure to the test device obtaining the component open-closed state of IGCT pulse power switch first below
It is described with workflow.
Specifically, current sensor 2 is sheathed on and is enclosed within the IGCT being made up of two back-to-back IGCT t1 and t2
In capacitance-resistance (i.e. rc) absorption circuit of assembly, subsequent process circuit is placed in the secondary low-voltage end of current sensor, is passed by electric current
Itself and subsequent process circuit are carried out electrical isolation by sensor 2.The secondary wiring terminals two ends of current sensor 2 are via interface p1With
p2Meet terminal resistance r respectivelytTwo ends, and the input p via the first twin-core Shielded Twisted Pair cable 3 and pretreatment circuit 43And p4
It is connected, pre-process the output end of circuit 4 and the input p of constant current power-switching circuit 55And p6It is connected, constant current power-switching circuit 5
Output end and the input p of the second twin-core Shielded Twisted Pair cable 67And p8It is connected, the output end of the second twin-core Shielded Twisted Pair cable 6
p9And p10Connect sampling resistor r respectivelylTwo ends, sampling resistor rlTerminal voltage vlIt is divided into two transmission paths, wherein one tunnel
It is connected with data acquisition unit 12, in addition a road is connected with the input of comparison circuit 7 with shaping, shaping is defeated with comparison circuit 7
Go out the input p at end and electro-optical conversion circuit 811And p12It is connected, the output end of electro-optical conversion circuit 8 turns via optical cable 9 and photoelectricity
Change circuit 10 to be connected, the input p of the output end of photoelectric switching circuit 10 and host computer or CCU 1113And p14Phase
Even.
Fig. 2 is the High-Voltage Insulation type structural representation of the current sensor according to the embodiment of the present invention.
In one embodiment of the invention, current sensor can be High-Voltage Insulation type current sensor.As Fig. 2 institute
Show, current sensor includes: current sensor coil 21, shielding overcoat 22 and insulating coating 23.Wherein, shielding overcoat 22 is located at
The outer layer of current sensor coil 21, the input terminal p of current sensor 21With outlet terminal p2Multiple twin is shielded by the first twin-core
Cable 3 is drawn.By said structure as in insulating coating 23, insulating coating 23 is located at the outer layer of shielding overcoat 22, and it is outer to insulate
It is inoculated with fluid sealant in set 23, be easy to solidify said structure, strengthen the insulating capacity of whole sensing head.An example in the present invention
In, current sensor coil 21 can be Luo-coil.
Fig. 3 is the schematic diagram of the pretreatment circuit according to the embodiment of the present invention.
The input of pretreatment circuit 4 passes through the secondary connection end of the first twin-core Shielded Twisted Pair cable 3 and current sensor 2
Son is connected, for receiving terminal resistance rtTerminal voltage signal and terminal voltage signal is pre-processed.Wherein, terminal resistance rt
Terminal voltage signal be used for characterizing the on off operating mode of IGCT pulse power switch assembly.
Pretreatment circuit 4 includes instrument operational amplifier, wherein the first pin of instrument operational amplifier and the 8th pin
Between be parallel with first resistor, the second pin is connected with one end of second resistance, the other end of second resistance and terminal resistance
One end is connected, and three-prong is connected with one end of 3rd resistor, and the other end of 3rd resistor is connected with the other end of terminal resistance,
4th pin connects negative supply, the 5th pin ground connection, and the 6th pin is connected with one end of the 4th resistance, another termination of the 4th resistance
Output port, the 7th pin connects positive supply.In an example of the present invention, instrument operational amplifier ap1Model can be
ad620.
As shown in figure 3, the binding post p of pretreatment circuit 43And p4, connect terminal resistance r respectivelyt, terminal resistance rt's
One termination 3rd resistor r41One end, 3rd resistor r41Another termination instrument operational amplifier ap1Three-prong a3Pin, eventually
End resistance rtAnother termination second resistance r42One end, second resistance r42Another termination instrument operational amplifier ap1?
Two pin a2Pin, first resistor r43It is attempted by instrument operational amplifier ap1The first pin a1Pin and the 8th pin a8Between pin,
Instrument operational amplifier ap1The 7th pin a7Pin meets positive supply+vdc1, instrument operational amplifier ap1The 4th pin a4Pin connects
Negative supply-vdc1, instrument operational amplifier ap1The 5th pin a5Pin ground wire gnd1, instrument operational amplifier ap1Output pin
6th pin a6Meet the 4th resistance r44One end, electric capacity c41One termination instrument operational amplifier ap1Three-prong a3Pin, electricity
Hold c41Other end ground wire gnd1, electric capacity c43One end ground wire gnd1, electric capacity c43Another termination positive supply+vdc1, electricity
Hold c42One termination instrument operational amplifier ap1The second pin a2Pin, electric capacity c42Other end ground wire gnd1, electric capacity c44's
One end ground wire gnd1, electric capacity c44Another termination negative supply-vdc1, the 4th resistance r44One termination instrument operational amplifier put
ap1Output pin the 6th pin a6, the 4th resistance r44Another termination output port p5, electric capacity c45One termination output port p5,
Electric capacity c45Another termination output port p6, output port p6Ground wire gnd1.
The input of constant current power-switching circuit 5 is connected with the output end of pretreatment circuit 4, and constant current power-switching circuit 5
Output end with second twin-core shield twisted wire cable 6 input be connected.Constant current power-switching circuit 5 is used for receiving expression IGCT
The terminal resistance r of the on off operating mode of pulse power switch assemblytTerminal voltage signal, and by terminal voltage signal be converted to electric current letter
Number, and current signal transfer is shielded twisted wire cable 6 to the second twin-core.
Constant-current source conversion electricity in the test device of the acquisition component open-closed state of IGCT pulse power switch of the present invention
Road 5 can adopt operational amplifier or difference amplifier chip.Separately below with reference to the constant current to above two form for Fig. 4 or Fig. 5
Power-switching circuit 5 is described.
Fig. 4 is the schematic diagram of the constant current power-switching circuit according to one embodiment of the invention.
Constant current power-switching circuit includes: the first operational amplifier, follower and the second operational amplifier.Wherein, the first fortune
The electrode input end calculating amplifier is connected with one end of the 5th resistance, the output end of the other end of the 5th resistance and pretreatment circuit
Mouth is connected, and the negative input of the first operational amplifier is connected with one end of the 6th resistance, and the other end of the 6th resistance is located with pre-
The output port of reason circuit is connected.The input of follower is connected with the output end of the first operational amplifier.Second operation amplifier
The electrode input end of device is connected with the output end of follower by resistance, negative input and output end short circuit, and output end
Connect to the electrode input end of the first operational amplifier, be parallel between the electrode input end of the second operational amplifier and signal ground
First electric capacity, and two termination the second twin-cores of the first electric capacity shield the input of twisted wire, the second twin-core shields the output end of twisted wire
Connect sampling resistor.
As shown in figure 4, the binding post p of constant current power-switching circuit 55Meet the 6th resistance r51One end, the 6th resistance r51's
Another termination the first operational amplifier ap2Negative input a2Pin, the binding post p of constant current power-switching circuit 56Connect the 5th electricity
Resistance r52One end, the 5th resistance r52Another termination the first operational amplifier ap2Electrode input end a3Pin, resistance r53It is attempted by
First operational amplifier ap2A2Pin and a6Between pin, the first operational amplifier ap2A4Pin meets negative supply-vdc1, the first computing
Amplifier ap2A7Pin meets positive supply+vdc1, resistance r54One termination the first operational amplifier ap2A3Pin, resistance r54Another
Terminate the second operational amplifier ap4Output pin c6, electric capacity c51One termination negative supply-vdc1, electric capacity c51Other end ground wire
Gnd1, electric capacity c52One termination positive supply+vdc1, electric capacity c52Other end ground wire gnd1.Follower ap3Input pin b2Connect
First operational amplifier ap2Output pin a6, follower ap3B5Pin meets positive supply+vdc1.Follower ap3B3Pin connects negative electricity
Source-vdc1, follower ap3Output pin b4Connecting resistance reOne end, resistance reAnother termination the second operational amplifier ap4C3
Pin, the second operational amplifier ap4C2Pin and c6Pin short circuit, the second operational amplifier ap4C4Pin meets negative supply-vdc1, the second fortune
Calculate amplifier ap4C7Pin meets positive supply+vdc1.First electric capacity c53It is attempted by the output wiring terminal p of constant current power-switching circuit 57
And p8Between, and binding post p8Ground wire gnd1.The output wiring terminal p of constant current power-switching circuit 57And p8Via second pair
Core Shielded Twisted Pair cable 6, respectively with binding post p9And p10It is connected, sampling resistor rlIt is attempted by binding post p9And p10Between,
Obtain the current signal i of the on off operating mode characterizing IGCT pulse power switch assembly via constant current power-switching circuit 5t, this electricity
Stream signal itFlow through sampling resistor, thus obtaining the voltage signal vl of the on off operating mode characterizing IGCT pulse power switch assembly
(vl=it × rl).Wherein, this signal is divided into two transmission paths, and wherein one tunnel is transferred to data acquisition unit 12, by data
Collector 12 Real-time Collection obtains characterizing the analog quantity of the on off operating mode of IGCT pulse power switch assembly, in addition a road transmission
The low and high level obtaining the on off operating mode characterizing IGCT pulse power switch assembly is continued with shaping and comparison circuit 7
Signal, i.e. on-off model.
In one embodiment of the invention, constant current power-switching circuit 5 can also adopt difference amplifier chip.Such as model
Difference amplifier chip for ina105.
Fig. 5 is the schematic diagram of the constant current power-switching circuit 5 according to another embodiment of the present invention.
Constant current power-switching circuit 5 includes: difference amplifier chip, follower and the second operational amplifier.Wherein, difference amplifier
The second of chip is connected with the output port of pretreatment circuit 4 with three-prong.The input of follower and difference amplifier chip
Output end be connected.The electrode input end of the second operational amplifier is connected with the output end of follower by resistance, and negative pole inputs
Hold and output end short circuit, and output end connects to the first pin of difference amplifier chip, the positive pole of the second operational amplifier is defeated
Enter and between end and signal ground, be parallel with the first electric capacity, and described second twin-core of two terminations of the first electric capacity shields the input of twisted wire
End, the second twin-core shields the output termination sampling resistor of twisted wire.The two ends of sampling resistor shield twisted wire 6 with the second twin-core respectively
Output end is connected, and shields the current signal of twisted wire 6 for receiving the second twin-core, and generates terminal voltage at the two ends of sampling resistor 6
Signal.
As shown in figure 5, the binding post p of constant current power-switching circuit 55Connect difference amplifier chip ap2The second pin a2Pin,
The binding post p of constant current power-switching circuit 56Connect difference amplifier chip ap2Three-prong a3Pin, difference amplifier chip ap2?
Five pin a5Pin and the 6th pin a6Pin short circuit, difference amplifier chip ap2The 4th pin a4Pin meets negative supply-vdc1, difference fortune
Put chip ap2The 7th pin a7Pin meets positive supply+vdc1.Difference amplifier chip ap2A1Pin meets the second operational amplifier ap4's
Output pin c6, electric capacity c51One termination negative supply-vdc1, electric capacity c51Other end ground wire gnd1, follower ap3Input pin
b2Connect difference amplifier chip ap2Output pin a6, follower ap3B5Pin meets positive supply+vdc1, follower ap3B3Pin connects negative electricity
Source-vdc1, follower ap3Output pin b4Connecting resistance reOne end, resistance reAnother termination amplifier ap4C3Pin, the second computing
Amplifier ap4C2Pin and c6Pin short circuit, the second operational amplifier ap4C4Pin meets negative supply-vdc1, the second operational amplifier ap4
C7Pin meets positive supply+vdc1.First electric capacity c53It is attempted by the output wiring terminal p of constant current power-switching circuit 57And p8Between, and
Binding post p8Ground wire gnd1, the output wiring terminal p of constant current power-switching circuit 57And p8Via the second twin-core Shielded Twisted Pair
Cable 6, respectively with binding post p9And p10It is connected.Sampling resistor rlIt is attempted by binding post p9And p10Between, turn via constant-current source
Change the current signal i that circuit 5 obtains the anti-on off operating mode characterizing IGCT pulse power switch assemblyt, current signal itFlow through and adopt
Sample resistance, thus obtain the voltage signal v of the on off operating mode characterizing IGCT pulse power switch assemblyl(vl=it×rl), should
Signal is divided into two transmission paths, and wherein one tunnel is transferred to data acquisition unit 12, is obtained by data acquisition unit 12 Real-time Collection
Characterize the analog quantity of the on off operating mode of IGCT pulse power switch assembly, in addition a road is transferred in shaping and comparison circuit 7
Continue with the low and high level signal obtaining the on off operating mode characterizing IGCT pulse power switch assembly, i.e. on-off model.
In an example of the present invention, the first and second operational amplifiers can be from single channel operational amplifier or double
Road operational amplifier, for example, the single channel operational amplifier of model op07, or the two-way operational amplifier of model op284.
In another example of the present invention, follower ap3: can select when electric current less (as less than 250ma)
Buf634, can select power operational amplifier pa01 when electric current larger (such as more than 1a).
Fig. 6 is the schematic diagram of the shaping according to the embodiment of the present invention and comparison circuit.
Shaping is connected with the two ends of sampling resistor with the input of comparison circuit 7, for receiving sampling resistor rlEnd electricity
Pressure signal vl, and according to sampling resistor rlTerminal voltage signal obtain characterize IGCT pulse power switch assembly on off operating mode
Low and high level signal.
Shaping is included with comparison circuit: diode, first comparator and the second comparator.Wherein, diode anode passes through
Resistance is connected with one end of sampling resistor, and negative electrode is connected with electrochemical capacitor positive pole, the minus earth of electrochemical capacitor, electrochemical capacitor with
Second electric capacity is in parallel.The electrode input end of first comparator is connected with the electrode input end of electrochemical capacitor by resistance, the first ratio
It is connected with the output end of first comparator by resistance further compared with the electrode input end of device.The negative input of the second comparator
It is connected with the positive terminal of electrochemical capacitor by resistance, the electrode input end of the second comparator passes through the defeated of resistance and the second comparator
Go out end to be connected, first comparator is connected with the output end of the second comparator, output characterizes IGCT pulse power switch assembly
On off operating mode low and high level signal.
As shown in fig. 6, the binding post p of shaping and comparison circuit 79And p10Via the second twin-core Shielded Twisted Pair cable 6, point
Not and constant current power-switching circuit 5 output wiring terminal p7And p8It is connected, sampling resistor rlIt is attempted by binding post p9And p10It
Between, binding post p10It is connected with ground wire gnd1, binding post p9With resistance r71One end be connected, resistance r71The other end and two
Pole pipe d71Anode be connected, diode d71Negative electrode and resistance r72One end be connected, resistance r72The other end and electrochemical capacitor
c72Positive pole be connected, electrochemical capacitor c72Positive pole and the second electric capacity c71Shorted on one end, electrochemical capacitor c72Negative pole and second electricity
Hold c71Other end short circuit and be connected with ground wire gnd1, resistance r74One termination electrochemical capacitor c72Positive pole, resistance r74Another
Termination first comparator ap5Electrode input end a3Pin, resistance r75One termination electrochemical capacitor c72Positive pole, resistance r75Another
Terminate the second comparator ap6Negative input a6Pin, resistance r76One end ground wire gnd1, resistance r76Another termination first
Comparator ap6A5Pin, resistance r77One termination the second comparator ap6Electrode input end a5Pin, resistance r77Another termination
Two comparator ap6Output end a7Pin, resistance r78One termination first comparator ap5Electrode input end a3Pin, resistance r78Another
One termination first comparator ap5Output end a1Pin, resistance r79One termination first comparator ap5Output end a1Pin, resistance r79
Another termination positive supply+vdc1, first comparator ap5A8Pin meets positive supply+vdc1, the second comparator ap6A4Pin connects negative electricity
Source-vdc1, first comparator ap5Output end a1Pin and output wiring terminal p11It is connected, the second comparator ap6Output end a7Pin
With output wiring terminal p12It is connected, via shaping and comparison circuit 7, obtain the break-make characterizing IGCT pulse power switch assembly
The low and high level signal v of statezt1.
In an example of the present invention China, the first and second comparators can be compared from single channel comparator or two-way
The single channel comparator of device, such as model lm331 or the two-way comparator of model lm393.
The input of data acquisition unit 12 and sampling resistor rlTwo ends be connected, for receiving sampling resistor rlTerminal voltage
Signal obtains the analog quantity of the on off operating mode of IGCT pulse power switch assembly with Real-time Collection.
In one embodiment of the invention, the commercial collection electricity that data acquisition unit 12 can be produced using dataq instrument
An outpost of the tax office's di-710 series of products, it has independent 16 data acquisition channel, and high-grade single-chip microcomputer or dsp chip may also be employed
Build capture card.Here, this patent repeats no more for this reason.
Fig. 7 is the schematic diagram of the electro-optical conversion circuit according to the embodiment of the present invention.
The input of electro-optical conversion circuit 8 is connected with the output end of comparison circuit 7 with shaping, for will from shaping with than
Be converted to light pulse signal compared with the level signal of circuit 7.
Electro-optical conversion circuit includes: with gate drive circuit and send optical fiber head, wherein, the first pin with gate drive circuit
Connect low and high level signal, the second pin and the first pin short circuit of the on off operating mode characterizing IGCT pulse power switch assembly.
Send optical fiber head to be connected with the three-prong of gate drive circuit, low and high level signal is converted to optical signal, and pass through optical cable
Send to photoelectric switching circuit 10.In one embodiment of the invention, optical cable is single single-mode fiber or single multimode fibre.
As shown in fig. 7, the binding post p of electro-optical conversion circuit 811Connect and gate drive circuit ap7B1Pin, electro-optic conversion electricity
The binding post p on road 812Connect and gate drive circuit ap7B4Pin, with gate drive circuit ap7The first pin b1Pin and the second pin
b2Pin short circuit, with gate drive circuit ap7B4Pin ground wire gnd1, with gate drive circuit ap7B8Pin meets positive supply+vdc2, with door
Drive circuit ap7B6Pin and b7Pin short circuit and being connected with ground wire gnd1, with gate drive circuit ap7Three-prong b3Pin receives and sends
Optical fiber head op1A6Pin, sends optical fiber head op1A6Pin respectively with a2Pin and a7Pin short circuit, electric capacity c82One end receive and send optical fiber
Head op1A7Pin, electric capacity c82Other end ground wire gnd1, electric capacity c81One termination positive supply+vdc2, electric capacity c81The other end
Ground wire gnd1, resistance r81One end receive and send optical fiber head op1A2Pin, resistance r81Another termination positive supply+vdc2, therefore,
Via electro-optical conversion circuit 8, the low and high level signal v of the on off operating mode of IGCT pulse power switch assembly will be characterizedzt1Conversion
For optical signal, transmit to photoelectric switching circuit 10 via optical cable 9.
In an example of the present invention, model sn75451 with gate drive circuit, send the model of optical fiber head
hfbr-1412t.
Fig. 8 is the schematic diagram of the photoelectric switching circuit according to the embodiment of the present invention.
The input of photoelectric switching circuit 10 is connected with the output end of electro-optical conversion circuit 8 by optical cable 9, for by light arteries and veins
Rush the voltage signal that signal conversion process obtains the on off operating mode for characterizing IGCT pulse power switch assembly.
Photoelectric switching circuit includes: reception optical fiber head, and wherein reception optical fiber head is connected with optical cable 9, for receiving optical signal,
And this optical signal is converted to the voltage signal of the corresponding on off operating mode characterizing IGCT pulse power switch assembly.
As shown in figure 8, photoelectric switching circuit 10 receives the sign IGCT from electro-optical conversion circuit 8 via optical cable 9
The low and high level signal v of the on off operating mode of pulse power switch assemblyzt1, reception optical fiber head op2A2Pin meets positive supply+vdc3, connect
Receive optical fiber head op2A3Pin and a7Pin short circuit and being connected with ground wire gnd2, reception optical fiber head op2A2Pin meets positive supply+vdc3, connect
Receive optical fiber head op2A6Pin connecting resistance r101One end, resistance r101Another termination positive supply+vdc3, electric capacity c101One end with connect
Receive optical fiber head op2A6Pin is connected, electric capacity c101Other end ground wire gnd2, electric capacity c102One termination positive supply+vdc3, electric capacity
c102Other end ground wire gnd2, output wiring terminal p13Meet a of photoelectric switching circuit 106Pin, output wiring terminal p14Ground connection
Line gnd2.Therefore, the height electricity of the on off operating mode of IGCT pulse power switch assembly will be characterized via photoelectric switching circuit 10
Ordinary mail vzt2Be converted to electric signal, and electric signal is passed to control module 11, control module 11 according to the result being obtained (is
No have digital quantity), finally give the on off operating mode of IGCT assembly operating, and for participating in block IGCT assembly driving pulse etc.
Important operation provides control instruction.
In an example of the present invention, model hfbr-2412t of reception optical fiber head.
Control module 11 is connected with the output end of photoelectric switching circuit 10, for according to receiving for characterizing IGCT
The voltage signal of the on off operating mode of pulse power switch assembly detects the on off operating mode of IGCT pulse power switch assembly.
In one embodiment of the invention, control module 11 can be host computer or CCU 11, depending on concrete
Application scenario, can be using computer, high-grade single-chip microcomputer or dsp chip, dsp+fpga chip or industrial computer.
To sum up, the present invention acquisition the component open-closed state of IGCT pulse power switch test device workflow such as
Under:
Because terminal resistance rt is serially connected in the secondary side of High-Voltage Insulation type current sensor 2, it belongs to low-pressure end, both permissible
As the output end of sensor, again can be as the input of pretreatment circuit 4, via the first twin-core Shielded Twisted Pair cable 3, will
Characterize the terminal resistance r of the on off operating mode of IGCT pulse power switch assemblytTerminal voltage signal vt, it is transferred to pretreatment electricity
Road 4.By pretreatment circuit 4 to this terminal voltage signal vtAfter carrying out preliminary treatment, it is transferred to constant current power-switching circuit 5, then by perseverance
Stream power-switching circuit 5 will characterize the voltage signal v of the on off operating mode of IGCT pulse power switch assemblytBe converted to current signal
it, it is transferred to sampling resistor r via the second twin-core Shielded Twisted Pair cable 6l, terminal voltage v that obtainedl(vl=it×rl), divided
For two transmission paths.Wherein one tunnel is transferred to data acquisition unit 12, obtains characterizing brilliant lock by data acquisition unit 12 Real-time Collection
Analog quantity v of the on off operating mode of pipe pulse power switch assemblyl, another road is transferred to shaping and comparison circuit 7, obtains and characterize crystalline substance
The low and high level signal of the on off operating mode of brake tube pulse power switch assembly, then by this level signal through electro-optical conversion circuit 8
Process obtains light pulse signal, is transferred to photoelectric switching circuit 10 by optical cable 9, obtains table by photoelectric switching circuit 10 conversion process
Levy the voltage signal of the on off operating mode of IGCT pulse power switch assembly, then this voltage signal be transferred to control module 11,
Control module 11, according to the result (whether having digital quantity) being obtained, finally gives the on off operating mode of IGCT assembly operating.
Below to characterize IGCT pulse power switch assembly on off operating mode voltage signal vlin (as shown in Figure 5) and
Reference voltage vr1And vr2Magnitude relationship and IGCT assembly t1 and t2 different conditions brief summary as follows:
(1) in vr1>vr2When, when meeting condition vlin<vr2When, that is, comparison circuit output low level, represents IGCT assembly
Short-circuit condition (IGCT assembly turns on all the time)；
(2) in vr1>vr2When, when meeting condition vlin>vr1When, that is, comparison circuit output low level, represents IGCT assembly
Open-circuit condition (IGCT assembly disconnects access failure all the time)；
(3) in vr1>vr2When, when meeting condition > vr1vlin>vr2When, that is, comparison circuit output high level, represents thyristor groups
Part normal condition.
As can be seen here, as the low and high level signal v of the on off operating mode characterizing IGCT pulse power switch assemblyzt2For low
During level, represent that IGCT assembly is faulty, it can be used as the control instruction of block electromagnetic irradiating device switching switch.In order to enter
One step analysis fault characteristic and exact failure positioning, by the measured data acquired in analyze data collector 12, and can tie
The fault tree closing early stage accumulation judges IGCT assembly for open circuit or short trouble, and which IGCT assembly appearance
Which kind of fault.
It is noted that, reference voltage vr1And vr2Between difference reflect the stagnant loop voltag value (error of comparison circuit
Value), tested voltage range should be taken into account, it is also contemplated that the sensitivity characteristics of comparator.Therefore, it is proposed that vr1And vr2Difference
Between 0.1v-0.2v.
The test device of the acquisition component open-closed state of IGCT pulse power switch according to embodiments of the present invention, electric current passes
Sense head adopts insulated type structure, by current sensing head heeling-in in the sheath with high voltage isolation capability, using constant-current source transmission
The voltage signal of on off operating mode characterizing IGCT pulse power switch assembly is it is convenient to detect IGCT assembly operating
Open fault or the voltage signal of short trouble, and this voltage signal is converted to current signal, can be used for long-distance transmissions,
Status information can also be uploaded in real time related host computer or CCU via optical cable, for participating in block thyristor groups
The important operations such as part driving pulse provide control instruction, solve and work in IGCT pulse power switch group under forceful electric power magnetic environment
The technical barrier of the remote state-detection of part is it is ensured that pulse power switch assembly being capable of healthy, safe and reliable operation.
The embodiment of the present invention acquisition the component open-closed state of IGCT pulse power switch test device at least include with
Lower beneficial effect:
(1) this test device devises high voltage bearing insulating sheath structure for current sensor, solves Electromagnetic Launching dress
Put the High-Voltage Insulation problem of middle IGCT assembly state detection sensor.
(2) characteristic quantity that this test device is extracted comes from the secondary end of High-Voltage Insulation type sensor, because it is low
Pressure side, thus greatly reducing the insulating requirements of circuit, simplifies the version of circuit.
(3) voltage signal of IGCT assembly running status is converted to current signal by this test device, has both achieved remote
Distance Transmission status signal is moreover it is possible to adapt to the special electromagnetic environment of electromagnetic launch system.
(4) this test device both can export digital quantity, can also transmit analog quantity, informative, enhance test
The adaptability of device.
(5) this test device adopts modularized design it is easy to extension, is easy to operate.
The test device of the acquisition component open-closed state of IGCT pulse power switch of the embodiment of the present invention can be promoted should
Use including IGCT, igbt, FET, igct pipe large-capacity power electronics converting means on off operating mode test device
In.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is example
Property it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art is in the principle without departing from the present invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification.The scope of the present invention
Limited by claims are extremely equivalent.
Claims (9)
1. a kind of test device obtaining the component open-closed state of IGCT pulse power switch is it is characterised in that include:
Current sensor, described current sensor is sheathed in the resistance-capacitance absorption loop of IGCT assembly, described current sensor
Secondary wiring terminals be respectively connecting to the two ends of terminal resistance；
Pretreatment circuit, the input of described pretreatment circuit passes through the first twin-core Shielded Twisted Pair cable and described current sensor
Secondary wiring terminals be connected, described pretreatment circuit be used for receive described terminal resistance terminal voltage signal and to described end electricity
Pressure signal is pre-processed, and wherein, the terminal voltage signal of described terminal resistance is used for characterizing IGCT pulse power switch assembly
On off operating mode；
Constant current power-switching circuit, the input of described constant current power-switching circuit is connected with the output end of described pretreatment circuit, and
And the input that the output end of described constant current power-switching circuit shields twisted wire cable with the second twin-core is connected, described constant-current source is changed
Circuit is used for receiving the terminal voltage signal of the terminal resistance of on off operating mode for representing IGCT pulse power switch assembly, and
Described terminal voltage signal is converted to current signal, and by described current signal transfer to described second twin-core shielding twisted wire line
Cable；
Sampling resistor, the output end that the two ends of described sampling resistor shield twisted wire with described second twin-core respectively is connected, and is used for connecing
Receive the current signal that described second twin-core shields twisted wire, and generate terminal voltage signal at the two ends of described sampling resistor；
Shaping and comparison circuit, described shaping is connected with the two ends of described sampling resistor with the input of comparison circuit, is used for connecing
Receive the terminal voltage signal of described sampling resistor, and sign IGCT pulse work(is obtained according to the terminal voltage signal of described sampling resistor
The low and high level signal of the on off operating mode of rate switch module；
Data acquisition unit, the input of described data acquisition unit is connected with the two ends of described sampling resistor, for adopting described in receiving
The terminal voltage signal of sample resistance obtains the analog quantity of the on off operating mode of IGCT pulse power switch assembly with Real-time Collection；
Electro-optical conversion circuit, the input of described electro-optical conversion circuit is connected with the output end of comparison circuit with described shaping, uses
In the level signal from described shaping and comparison circuit is converted to light pulse signal；
Photoelectric switching circuit, the input of described photoelectric switching circuit passes through the output end phase of optical cable and described electro-optical conversion circuit
Even, for described light pulse signal conversion process being obtained on off operating mode for characterizing IGCT pulse power switch assembly
Voltage signal；
Control module, described control module is connected with the output end of described photoelectric switching circuit, for according to being used for of receiving
The voltage signal characterizing the on off operating mode of IGCT pulse power switch assembly detects the logical of IGCT pulse power switch assembly
Disconnected state.
2. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described current sensor is High-Voltage Insulation type current sensor, and wherein, described current sensor includes:
Current sensor coil；
Shielding overcoat, positioned at the outer layer of described current sensor coil, the input terminal of described current sensor and outlet terminal
Drawn by described first twin-core Shielded Twisted Pair cable；
Insulating coating, described insulating coating is located at the outer layer of described shielding overcoat, and is inoculated with fluid sealant in described insulating coating.
3. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described pretreatment circuit includes:
Instrument operational amplifier, is parallel with first resistor between the first pin of described instrument operational amplifier and the 8th pin,
Second pin is connected with one end of second resistance, and the other end of described second resistance is connected with one end of described terminal resistance, the
Three-prong is connected with one end of 3rd resistor, and the other end of described 3rd resistor is connected with the other end of described terminal resistance, the
Four pins connect negative supply, the 5th pin ground connection, and the 6th pin is connected with one end of the 4th resistance, the other end of described 4th resistance
Connect output port, the 7th pin connects positive supply.
4. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described constant current power-switching circuit includes:
First operational amplifier, the electrode input end of described first operational amplifier is connected with one end of the 5th resistance, and described
The other end of five resistance with described pretreatment circuit output port be connected, the negative input of described first operational amplifier and
One end of 6th resistance is connected, and the other end of described 6th resistance is connected with the output port of described pretreatment circuit；
Follower, the input of described follower is connected with the output end of described first operational amplifier；
Second operational amplifier, the electrode input end of described second operational amplifier passes through the output end of resistance and described follower
It is connected, negative input and output end short circuit, and output end connects to the electrode input end of described first operational amplifier, institute
State and between the electrode input end of the second operational amplifier and signal ground, be parallel with the first electric capacity, and two terminations of the first electric capacity are described
Second twin-core shields the input of twisted wire, and the output that described second twin-core shields twisted wire terminates described sampling resistor.
5. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described constant current power-switching circuit includes:
Difference amplifier chip, second and three-prong of described difference amplifier chip and the described output port phase pre-processing circuit
Even；
Follower, the input of described follower is connected with the output end of described difference amplifier chip；
Second operational amplifier, the electrode input end of described second operational amplifier passes through the output end of resistance and described follower
It is connected, negative input and output end short circuit, and output end connects to the first pin of described difference amplifier chip, described the
It is parallel with the first electric capacity, and two terminations described second of the first electric capacity between the electrode input end of two operational amplifiers and signal ground
Twin-core shields the input of twisted wire, and the output that described second twin-core shields twisted wire terminates described sampling resistor.
6. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described shaping and comparison circuit include:
Diode, described diode anode is connected with one end of described sampling resistor by resistance, negative electrode and electrochemical capacitor positive pole
It is connected, the minus earth of described electrochemical capacitor, described electrochemical capacitor is in parallel with the second electric capacity；
First comparator, the electrode input end of described first comparator passes through the electrode input end phase of resistance and described electrochemical capacitor
Even, the electrode input end of described first comparator is connected with the output end of first comparator by resistance further；
Second comparator, described second comparator negative input is connected with the positive terminal of described electrochemical capacitor by resistance, institute
The electrode input end stating the second comparator is connected with the output end of described second comparator by resistance, first comparator and second
The output end of comparator is connected, and output characterizes the low and high level signal of the on off operating mode of IGCT pulse power switch assembly.
7. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described electro-optical conversion circuit includes:
With gate drive circuit, the described break-make connecing sign IGCT pulse power switch assembly with gate drive circuit the first pin
The low and high level signal of state, the second pin and the first pin short circuit；
Send optical fiber head, described transmission optical fiber head is connected with the three-prong of gate drive circuit with described, by low and high level signal
Be converted to optical signal, and sent to described photoelectric switching circuit by optical cable.
8. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described photoelectric switching circuit includes:
Reception optical fiber head, described reception optical fiber head is connected with described optical cable, for receiving optical signal, and described optical signal is changed
Voltage signal for the corresponding on off operating mode characterizing IGCT pulse power switch assembly.
9. the test device obtaining the component open-closed state of IGCT pulse power switch as claimed in claim 1, its feature exists
In described optical cable is single single-mode fiber or single multimode fibre.
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| CN105785261A (en) * | 2014-12-23 | 2016-07-20 | 南京南瑞继保电气有限公司 | High-speed switch detection device and method |
| CN105865571A (en) * | 2016-06-23 | 2016-08-17 | 武汉天富海科技发展有限公司 | Device of remotely testing liquid level of high-voltage power electronic equipment cooling system |
| CN106198649B (en) * | 2016-06-23 | 2019-06-18 | 武汉天富海科技发展有限公司 | A kind of device of Distance Test power electronic equipment humidity |
| CN106124976B (en) * | 2016-06-23 | 2019-05-07 | 武汉天富海科技发展有限公司 | A kind of remote detection device for obtaining alternating-current switch health status |
| CN106019064A (en) * | 2016-08-04 | 2016-10-12 | 歌尔股份有限公司 | Electronic element on-off measuring method and equipment applied to same |
| CN107024880B (en) * | 2017-04-05 | 2019-08-20 | 武汉天富海科技发展有限公司 | A kind of integrated switched component |
| CN107681702A (en) * | 2017-08-17 | 2018-02-09 | 国网北京市电力公司 | Alternating current-direct current series-parallel connection adjusting method and circuit |
| CN109541373B (en) * | 2018-11-27 | 2023-12-12 | 上海电子信息职业技术学院 | Quick twisted-pair cable on-off tester |
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