CN209250608U - A kind of trigger circuit for photo thyristor of connecting - Google Patents
A kind of trigger circuit for photo thyristor of connecting Download PDFInfo
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- CN209250608U CN209250608U CN201822014778.4U CN201822014778U CN209250608U CN 209250608 U CN209250608 U CN 209250608U CN 201822014778 U CN201822014778 U CN 201822014778U CN 209250608 U CN209250608 U CN 209250608U
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- circuit
- power supply
- photo thyristor
- control signal
- light pulse
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Abstract
The utility model discloses a kind of trigger circuits for photo thyristor of connecting, and are mainly made of power supply processing circuit, control signal receiving circuit, synchronous circuit, logical circuit and light pulse emission circuit；Control signal receiving circuit, synchronous circuit, logical circuit and the light pulse emission circuit is sequentially connected and connects；The power supply processing circuit is control signal receiving circuit, synchronous circuit, logical circuit and light pulse emission loop power supply.The utility model realizes that simply few using component, stability is good, and anti-electromagnetic interference capability is strong, high reliablity, and service time is inconsistent caused by efficiently solving the problems, such as because of device parameters difference.
Description
Technical field
The utility model belongs to field of power electronics, is related to trigger circuit, and the trigger circuit is light-operated for semiconductor devices
The triggering and conducting of thyristor.
Background technique
Traditional thyristor is automatically controlled thyristor, automatically controlled thyristor ETT(Electronic Triggered
Thyristor) using the open-minded of electric pulse control thyristor；Automatically controlled thyristor is used in high-tension circuit, at usual control circuit
In hyperbaric environment, the electromagnetic field that high pressure generates will affect the current potential of control circuit energized conductor, be difficult to accomplish the isolation of high-low pressure.
Photo thyristor LTT(Light Triggered Thyristor) it is to solve the problems, such as that automatically controlled thyristor exists
It was developed, is chiefly used in HVDC transmission system and flexible AC transmitting system before more than 20 years.Photo thyristor
Principle be luminance signal triggering and conducting thyristor using certain wavelength, high-power light-operated trigger signal then passes through thyristor sheet
Body carries the semiconductor laser on optical cable and realizes triggering and conducting.Light pulse directly triggers the conducting of thyristor, realizes high pressure
With the electrical isolation of low pressure, there is very strong anti-electromagnetic interference capability, and simplified control trigger circuit.
Trigger circuit is control pulse needed for the control instruction for issuing master control is changed into turn on thyristors, and returns touching
Send out status signal.For concatenated thyristor, if pulse issues, the time is inconsistent, will generate showing for dynamic unbalanced-voltage-division weighing apparatus
As.Since the on state resistance of thyristor is milliohm rank, off-state resistance is megaohm rank, and the two differs very big, the crystalline substance of conducting
The voltage at brake tube both ends falls to its on-state voltage drop, so that the thyristor be connected afterwards can bear higher overvoltage.
Utility model content
The purpose of this utility model is that being directed to the deficiencies in the prior art, provide a kind of for light-operated crystalline substance of connecting
The trigger circuit of brake tube.
In order to achieve the above objectives, the technical solution adopted in the utility model is as follows:
A kind of trigger circuit for photo thyristor of connecting, mainly by power supply processing circuit, control signal receiving circuit,
Synchronous circuit, logical circuit and light pulse emission circuit composition；The control signal receiving circuit, synchronous circuit, logic are returned
Road and light pulse emission circuit are sequentially connected and connect；The power supply processing circuit is control signal receiving circuit, synchronous circuit, patrols
Collect circuit and light pulse emission loop power supply.
The trigger circuit of the utility model receives the thyristor status signal of photo thyristor state-detection plate detection under
The control instruction that position machine issues returns triggering state feedback information to slave computer while generating triggering light.
As the further explanation of the utility model specific technical solution, the power supply processing circuit be input 4.5~
The DC voltage of 60V, the positive voltage for exporting 5V, electric current up to 2A power supply processing circuit.The electricity in the present invention
Source treatment loop preferentially selects the power supply chip LMZ36002RVQT of 24V voltage input, 5V output；The chip has wide input model
It encloses, it is the power supply chip of high power small package that output electric current, which reaches 2A, but needs to pay attention to radiating treatment, is usually heated with via hole
The mode of pad is realized.
As the further explanation of the utility model specific technical solution, the control signal receiving circuit is equipped at clipping
Manage circuit and transistor amplifier；The amplitude limiting processing circuit is mainly made of two diodes；The triode is put
Big circuit is mainly made of a NPN transistor, a PNP transistor, several resistance and capacitor.
As the further explanation of the utility model specific technical solution, the control signal receiving circuit passes through change-over terminal
The pulse signal of the next machine controller 3.3V is introduced into trigger circuit by son, and transistor amplifier is inputted after amplitude limiting processing
Boosting becomes the pulse of 5V.
As the utility model specific technical solution further explanation and preferably, the synchronous circuit is by pulse
Signal is changed into the circuit of multipulse signal.Synchronous circuit first with same input, divides column output circuit, carries out cascaded triggering control.
In the present invention, synchronous circuit preferably use has the phase inverter chip CD4049UB of 16 system buffers, can incite somebody to action
CMOS level conversion is Transistor-Transistor Logic level, which allows input high level to be more than supply voltage, and enhances driving current.With defeated
Enter different outputs, the time difference in each channel is up to the sum of delay-time difference and conversion time difference, is 140ns.
As the further explanation and preferably of the utility model specific technical solution, the logical circuit uses four-way
2 input nand gate chip 74ACT [Q] 00MTC.Logical circuit issues triggering under the premise of detecting that device status information is good
Pulse, guarantees the reliability of circuit work, i.e. the state that master control is transmitted is determined that signal is made jointly with trigger pulse by logical circuit
With the generation for determining light pulse, when in good condition and pulse issues, logical circuit exports electrical driving pulses.
As the further explanation of the utility model specific technical solution, the light pulse emission circuit is mainly by optical fiber
Transmitter and several resistance, capacitor form.Fiber optic emitter preferably uses HFBR-1414Z.
It is the light pulse of 800~1000nm as its touching that photo thyristor, which uses tens milliwatts (not less than 10mW), wavelength,
Pulse is sent out, the carrier that this light pulse generates first turns on the photosensitive area of photo thyristor, and anode voltage is applied directly to
The p-type base area of photosensitive area, then photo thyristor is connected by multiple amplifier gates.Light pulse is by fiber optic emitter HFBR-
1414Z is generated, and the gate pole of photo thyristor is issued to through optical fiber.Prime is the driving electricity that NAND gate 74ACT [Q] 00MTC is constituted
The reliable triggering of light pulse is completed on road.
Compared with prior art, the utility model have the utility model has the advantages that
1. service time is inconsistent caused by solving the problems, such as because of device parameters difference；
2. anti-electromagnetic interference capability is strong, high reliablity；
3. realizing that simply few using component, stability is good.
Detailed description of the invention
Fig. 1 is the connection principle block diagram of an embodiment of the present invention and slave computer, thyristor string；
Fig. 2 is the structural block diagram of an embodiment of the present invention；
Fig. 3 is the circuit diagram in power supply processing circuit in an embodiment of the present invention；
Fig. 4 is the circuit diagram that signal receiving circuit is controlled in an embodiment of the present invention；
Fig. 5 is the circuit diagram of synchronous circuit in an embodiment of the present invention；
Fig. 6 is the circuit diagram of logical circuit in an embodiment of the present invention；
Fig. 7 is the circuit diagram in light pulse emission circuit in an embodiment of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Embodiment:
As shown in Figure 1, the trigger circuit of the present embodiment receives the thyristor state of photo thyristor state-detection plate detection
The control instruction that signal and slave computer issue returns triggering state feedback information to slave computer while generating triggering light.
Specific circuit structure is as shown in Fig. 2, a kind of trigger circuit for photo thyristor of connecting, mainly by power supply
Manage circuit, control signal receiving circuit, synchronous circuit, logical circuit and light pulse emission circuit composition；The control signal
Circuit, synchronous circuit, logical circuit and light pulse emission circuit is received to be sequentially connected and connect；The power supply processing circuit is control
Signal receiving circuit, synchronous circuit, logical circuit and light pulse emission loop power supply.
Power supply processing circuit inputs the DC voltage of 24V, and the positive voltage for exporting 5V provides power supply to each circuit；Control signal
It receives circuit and driving plate is introduced by the trigger pulse that conversion terminal issues controller, and enhance through transistor amplifier and believe
Number driving capability.Synchronous circuit first with same input, divides column output circuit, carries out cascaded triggering control.Single driving signal is through non-
Door chip carries out level translation, and enhances the driving capability of signal.The light pulse signal in light pulse emission circuit is by fibre optical transmission
Device generates, and the gate pole of photo thyristor is issued to through optical fiber.Prime is the driving circuit constituted with logic gates, completes light arteries and veins
The reliable triggering of punching.
In order to which the technical solution of the present embodiment is more clearly understood, the present embodiment is made into one below in conjunction with attached drawing 3-7
Step explanation:
The power supply chip LMZ36002RVQT of 24V voltage input, 5V output is selected in the power supply processing circuit of the present embodiment.Such as
Shown in Fig. 3, VBAT is 24V DC voltage, and quoted from external switch power supply, 24V power supply enters power supply chip through protective tube
LMZ36002RVQT, when output voltage is greater than 4.5V, the external resistance R1 of chip pin 7 terminates output voltage；When output electricity
When pressure is less than 4.5V, the end R1 ground connection.If output voltage is 5V, resistance R5 value 5.11K Ω.
The control signal receiving circuit of the present embodiment is mainly by two diodes, a NPN transistor, a positive-negative-positive
Transistor, several resistance and capacitor composition.As shown in figure 4, diode D1, D2 are in parallel, the control of the external slave computer of input terminal
Device processed exports one end of terminating resistor R12, the base stage of another termination NPN transistor V2 of resistance R12, NPN transistor V2
Collector be concatenated the base stage that resistance R11 is followed by PNP transistor V1, the emitter ground connection of NPN transistor V2, positive-negative-positive
The emitter of transistor V1 accesses 5V voltage, and the collector of PNP transistor V1 accesses synchronous circuit after being concatenated resistance R17.
That is, control signal inputs to NPN transistor V2, V2 model MMBT440LT1G, rear class is positive-negative-positive after amplitude limiting processing
3.3V pulse signal is promoted to 5V pulse signal by the output circuit that transistor is constituted, V1 model PMBT4403, the circuit.
The synchronous circuit of the present embodiment is the circuit that single pulse signal is changed into multipulse signal.As shown in figure 5, synchronous
Circuit uses the phase inverter chip CD4049UB with 16 system buffers, and each pin connection relationship is as shown in the figure.
The logical circuit of the present embodiment as shown in fig. 6, the chip U9 used for 2 input nand gate chip 74ACT of four-way
[Q] 00MTC, it is ensured that Switching Noise level and dynamic threshold characteristic.Exporting current direction is two-way, and output off current HIGH
Up to 50mA, by determine with state the phase of signal with, it is ensured that output pulse reliably issues.Time difference between output and output
Only 1ns has very high consistency.
The circuit structure in the light pulse emission circuit of the present embodiment is as shown in fig. 7, mainly by fiber optic emitter and several
Resistance, capacitor composition, specifically: fiber optic emitter U7 selects model HFBR-1414Z.The pin 1 of fiber optic emitter U7,4,
5,8 ground connection, the pin 2,6,7 of fiber optic emitter U7 connect+5V voltage；Capacitor C9, C10 latter termination fiber optic emitter U7's in parallel
Pin 2,6,7, other end ground connection；The pin 3 of fiber optic emitter U7 is concatenated the output after resistance R16, R15 with prime NAND gate
Connect, capacitor C11 is in parallel with resistance R15, and resistance R18 mono- terminates the pin 3 of fiber optic emitter U7, other end ground connection.
When driving pulse is high level, the non-triggering and conducting of HFBR-1414Z；When driving pulse is low level, HFBR-
1414Z triggering and conducting.Driving resistance is 53 Ω, driving current 60mA.
Above example is only to illustrate the technical solution of the utility model rather than its limitations, although referring to examples detailed above pair
The utility model is described in detail, it should be understood by those ordinary skilled in the art that: still can be to the utility model
Specific embodiment modify perhaps replace on an equal basis and any modification without departing from the spirit and scope of the utility model or
Equivalent replacement should all cover in the scope of the claims of the utility model.
Claims (9)
1. a kind of trigger circuit for photo thyristor of connecting, it is characterised in that: mainly by power supply processing circuit, control signal
Receive circuit, synchronous circuit, logical circuit and light pulse emission circuit composition；The control signal receiving circuit synchronizes electricity
Road, logical circuit and light pulse emission circuit are sequentially connected and connect；The power supply processing circuit is control signal receiving circuit, same
Step circuit, logical circuit and light pulse emission loop power supply.
2. the trigger circuit according to claim 1 for photo thyristor of connecting, it is characterised in that: at the power supply
Reason circuit be the DC voltage for inputting 4.5~60V, the output positive voltage of 5V, electric current up to 2A power supply processing circuit.
3. the trigger circuit according to claim 1 or 2 for photo thyristor of connecting, it is characterised in that: the electricity
The power supply chip LMZ36002RVQT that source treatment loop is exported using 24V voltage input, 5V.
4. the trigger circuit according to claim 1 for photo thyristor of connecting, it is characterised in that: the control signal
It receives circuit and is equipped with amplitude limiting processing circuit and transistor amplifier；The amplitude limiting processing circuit is mainly by two diode groups
At；The transistor amplifier is mainly by a NPN transistor, a PNP transistor, several resistance and capacitor
Composition.
5. the trigger circuit according to claim 4 for photo thyristor of connecting, it is characterised in that: the control signal
It receives circuit the pulse signal of the next machine controller 3.3V is introduced into trigger circuit by conversion terminal, after amplitude limiting processing
Input transistor amplifier boosting becomes the pulse of 5V.
6. the trigger circuit according to claim 1 for photo thyristor of connecting, it is characterised in that: described synchronizes electricity
Road is the circuit that single pulse signal is changed into multipulse signal.
7. the trigger circuit according to claim 6 for photo thyristor of connecting, it is characterised in that: described synchronizes electricity
Road uses the phase inverter chip CD4049UB with 16 system buffers.
8. the trigger circuit according to claim 1 for photo thyristor of connecting, it is characterised in that: the logic is returned
Road uses four-way 2 input nand gate chip 74ACT [Q] 00MTC.
9. the trigger circuit according to claim 1 for photo thyristor of connecting, it is characterised in that: the light pulse
Launching circuit is mainly made of fiber optic emitter and several resistance, capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014778.4U CN209250608U (en) | 2018-12-03 | 2018-12-03 | A kind of trigger circuit for photo thyristor of connecting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014778.4U CN209250608U (en) | 2018-12-03 | 2018-12-03 | A kind of trigger circuit for photo thyristor of connecting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209250608U true CN209250608U (en) | 2019-08-13 |
Family
ID=67531233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822014778.4U Active CN209250608U (en) | 2018-12-03 | 2018-12-03 | A kind of trigger circuit for photo thyristor of connecting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209250608U (en) |
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2018
- 2018-12-03 CN CN201822014778.4U patent/CN209250608U/en active Active
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