CN110798051A - Digital phase-locked thyristor phase-shift trigger controller - Google Patents
Digital phase-locked thyristor phase-shift trigger controller Download PDFInfo
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- CN110798051A CN110798051A CN201810868932.6A CN201810868932A CN110798051A CN 110798051 A CN110798051 A CN 110798051A CN 201810868932 A CN201810868932 A CN 201810868932A CN 110798051 A CN110798051 A CN 110798051A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0824—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in thyristor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
Abstract
A digital phase-locked thyristor phase-shift trigger controller belongs to the technical field of semiconductor current transformation, and particularly relates to a digital phase-locked thyristor phase-shift trigger controller. The invention provides a digital phase-locked thyristor phase-shift trigger controller. The invention comprises a current regulator, a voltage regulator, a power supply and synchronous circuit, a phase-shifting circuit, a digital phase-locked pulse circuit and a pulse amplifying circuit, and has the structural key points that the feedback in the current regulator is compared with the given value to carry out proportional-integral adjustment; voltage setting and voltage feedback are input to the reverse input end of the voltage regulator to carry out proportional-integral regulation; the output phases of the current regulator and the voltage regulator are AND-fed to the phase shifting circuit; the output of the phase-shifting circuit is connected to a digital phase-locking pulse circuit, the frequency of a phase-shifting signal is doubled to form a trigger pulse, and the trigger pulse is isolated and output through a pulse amplifying circuit and a pulse transformer; the output end of the alternating current power supply of the power supply and synchronization circuit is connected with the synchronization unit in the phase-shifting circuit.
Description
Technical Field
The invention belongs to the technical field of semiconductor current transformation, and particularly relates to a digital phase-locked thyristor phase-shift trigger controller.
Background
The trigger controller circuit is a core component of the thyristor converter device. The thyristor converter device is a strong interference source, and the interference on the trigger control circuit is particularly strong. At present, a trigger controller circuit is generally a single chip microcomputer and a synchronous counter circuit, and the circuit is often unstable in work on site.
Disclosure of Invention
The invention aims at the problems and provides a digital phase-locked thyristor phase-shifting trigger controller.
In order to achieve the purpose, the invention adopts the following technical scheme that the invention comprises a current regulator, a voltage regulator, a power supply and synchronous circuit, a phase-shifting circuit, a digital phase-locked pulse circuit and a pulse amplifying circuit, and the structure of the invention is characterized in that the feedback and the given phase in the current regulator are compared to perform proportional-integral adjustment; voltage setting and voltage feedback are input to the reverse input end of the voltage regulator to carry out proportional-integral regulation;
the output phases of the current regulator and the voltage regulator are AND-fed to the phase shifting circuit; the output of the phase-shifting circuit is connected to a digital phase-locking pulse circuit, the frequency of a phase-shifting signal is doubled to form a trigger pulse, and the trigger pulse is isolated and output through a pulse amplifying circuit and a pulse transformer;
the alternating current power output end of the power supply and synchronization circuit is connected with the synchronization unit in the phase-shifting circuit; the phase sequence identification signal output end of the power supply and synchronization circuit is connected with the pulse distribution input end of the digital phase-locked pulse circuit.
As a preferred scheme, the phase-shift signal forms 6-phase trigger pulses after frequency multiplication.
As a preferable scheme, the invention further comprises a current amplifying circuit and a protection circuit, wherein the output of the current amplifying circuit is respectively connected with an overcurrent protection unit and a current regulator feedback circuit in the protection circuit.
As another preferable scheme, the protection circuit of the present invention includes an overvoltage protection unit and an undervoltage protection unit.
As another preferable scheme, the current amplifying circuit of the invention includes an LM324 chip IC1A, pin 2 of IC1A is connected to one end of a resistor R88 and one end of a resistor R27 respectively, the other end of the resistor R88 is connected to pin 2 of a jumper switch J1, pin 4 and pin 5 of the jumper switch J1 are connected to a pin Jin8 terminal, the other end of the resistor R27 is connected to pin 1 of a jumper switch J1, pin 3 of the jumper switch J1 is connected to an anode of a diode D7, an anode of a diode D8 and an anode of a diode D9 respectively, a cathode of the diode D7 is connected to a terminal Jin4 and an anode of a diode D10 respectively, and a cathode of the diode D8 is connected to a terminal Jin5 respectively, the anode of the diode D11 is connected, the cathode of the diode D9 is connected with the anode of the terminal Jin6 and the anode of the diode D12 respectively, the anode of the diode D10 is connected with the cathode of the terminal Jin7, the anode of the diode D11, the anode of the diode D12, the ground wire and one end of the resistor R28 respectively, the other end of the resistor R28 is connected with the pin 3 of the IC1A, and the pin 1 of the IC1A is connected with the current regulator and the overcurrent protection unit in the protection circuit respectively through the resistor R1.
As another preferred scheme, the protection circuit of the invention comprises an LM324 chip IC2C, an IC2B, and an IC2D, wherein pin 9 of IC2C is connected to the adjustment end of a varistor W7, one connection end of varistor W7 is connected to a +15V power supply, and the other connection end of varistor W7 is grounded through a resistor R35; the pin 10 of the IC2C is connected with the output end of the current amplification circuit through a resistor R34; the pin 8 of the IC2C is connected with the anode of a diode D16, and the cathode of a diode D16 is respectively connected with the cathode of the diode D17, the cathode of the diode D41, the input end of the current regulator, the input end of the voltage regulator and the input end of the digital phase-locked pulse circuit;
a pin 6 of the IC2B is connected with a terminal Jin9 through a resistor R102, a pin 5 of the IC2B is respectively connected with one end of a resistor R38 and one end of a resistor R39, the other end of the resistor R38 is grounded, and the other end of the resistor R39 is respectively connected with a pin 7 of the IC2B and the anode of a diode D17;
the pin 13 of the IC2D is connected with the adjusting end of a rheostat W4, one connecting end of the rheostat W4 is connected with a +15V power supply, and the other connecting end of the rheostat W4 is grounded through a resistor R92; the pin 12 of the IC2D is connected with the collector of the protective self-locking reset NPN triode N13, the cathode of the diode D44 and the voltage feedback input end of the voltage regulator, the emitter of the NPN triode N13 is grounded, the base of the NPN triode N13 is connected with the base of the NPN triode N12 and one end of the resistor R33, the emitter of the NPN triode N12 is grounded, the collector of the NPN triode N12 is connected with the pin 10 of the IC2C, and the other end of the resistor R33 is connected with the +15V power supply through the switch S1; the pin 14 of the IC2D is respectively connected with one end of a resistor R94, the anode of a diode D41 and the anode of a diode D45, the other end of the resistor R94 is connected with the anode of a diode D44, the cathode of a diode D45 is respectively connected with the cathode of a diode D46 and the base of an NPN triode N4, the anode of a diode D46 is connected with the pin 8 of the IC2C, the emitter of the NPN triode N4 is grounded, the collector of the NPN triode N4 is connected with the control end of a relay J, and the controlled end of the relay J is connected with.
As another preferred scheme, the current regulator of the invention comprises an LM324 chip IC1C, pin 13 of IC1C is connected to a current setting input terminal Jin14 and a regulating terminal of a varistor W1, respectively, one connection terminal of the varistor W1 is connected to an output terminal of a current amplifying circuit, the other connection terminal of the varistor W1 is grounded, and pin 12 of IC1C is grounded through a resistor R4; the 14 pin of the IC1C is connected to the emitter of a PNP triode P4, one end of a capacitor C3, and the cathode of a diode D2, the other end of a capacitor C3 is connected to one end of a capacitor C2 and one end of a jumper switch J2, the other end of a capacitor C2 is connected to one end of a resistor R5 and the other end of a jumper switch J2 through a resistor R6, the other end of a resistor R5 is connected to the anode of a diode D6 and the power supply +15V, the cathode of a diode D6 is connected to the collector of a PNP triode P4, and the base of the PNP triode P4 is connected to the voltage regulator and the.
As another preferable scheme, the voltage regulator of the invention includes an LM324 chip IC1D, pin 9 of IC1D is connected to a regulation terminal of a varistor W2 through an open-loop/closed-loop transfer switch S2, a connection terminal of varistor W2 is connected to a voltage feedback signal terminal Jin11, another connection terminal of varistor W2 is connected to ground, pin 8 of IC1D is connected to an emitter of a PNP triode P1, a cathode of a diode D5, a base of PNP triode P1, and an anode of a diode D5 are connected to the current regulator.
As another preferred scheme, the phase shift circuit of the present invention includes an LM324 chip IC1B, wherein pin 5 of IC1B is connected to a regulation terminal and a connection terminal of a varistor W3, a connection terminal of a varistor W5, and a collector of an NPN triode N1, a base of the NPN triode N1 is connected to a regulation terminal of a varistor W5, and an emitter of the NPN triode N1 is connected to a ground line and another connection terminal of the varistor W5; the other connecting end of the rheostat W3 is respectively connected with the output end of the current regulator and the output end of the voltage regulator;
a pin 5 of the IC1B is respectively connected with a collector of an NPN triode N2, a collector of an NPN triode N3 and one end of a capacitor C12, an emitter of the NPN triode N2 is respectively connected with a base of the NPN triode N3, the other end of the capacitor C12 and one end of a resistor R50, the other end of the resistor R50 is connected with a-15V power supply, and an emitter of the NPN triode N3 is grounded; the base of NPN triode N2 is connected with the output end of the power supply and synchronous circuit, and pin 7 of IC1B is connected with the input end of the digital phase-locked pulse circuit.
As another preferable scheme, the power supply and synchronization circuit of the invention includes a transformer T8, the primary side of the transformer T8 is the mains supply access end, the secondary side of the transformer T8 is connected to the input end of the chip U3 and the chip U2 of 7915 through a rectifier bridge 7815, and the output end of the U3 is connected to the input end of the chip U1 of 7805; one end of a mains supply access end is connected with one end of the primary side of a transformer T8 and one end of a resistor RB respectively, the other end of the resistor RB is connected with one end of a capacitor C20 and one end of the input end of a phase sequence identifying rectifier respectively, the other end of the mains supply access end is connected with one end of a capacitor C17 and the other end of the input end of the phase sequence identifying rectifier respectively through a capacitor CB, the other end of a capacitor C17, the other end of a capacitor C20 and one end of the primary side of a transformer T8 are connected, the output end of the phase sequence identifying rectifier is connected with the input end of a TIL113 chip O389.
Secondly, the digital phase-locked pulse circuit comprises 4046 chips IC3, 16V8 chips IC6, MC7555 chips IC4, 4015 chips IC5A and IC5B, wherein 14 pins of IC3 are connected with the output end of the phase-shift circuit, 4 pins of IC3 are respectively connected with 1 pin of IC5A, 15 pins of IC5A and 9 pins of IC5B, the outputs of IC5A and IC5B are connected with the input of IC6, and the output of IC6 is connected with the input port of the pulse amplification circuit;
the pin 4 of the IC4 is respectively connected with one end of a resistor R85 and the collector of an NPN triode N5, the other end of the resistor R85 is connected with the pin 4 of the IC3, the emitter of the NPN triode N5 is grounded, the collector of the NPN triode N5 is connected with the output end of the protection circuit, and the pin 3 of the IC4 is connected with the pin 12 of the IC 6.
In addition, the pulse amplifying circuit comprises NPN triodes N6-N11, bases of NPN triodes N6-N11 are connected with the output end of the digital phase-locked pulse circuit, collectors of NPN triodes N6-N11 are respectively connected with primary sides of transformers T2-T7, emitters of NPN triodes N6-N11 are grounded, secondary sides of the transformers T2-T7 are respectively connected to pulse output terminals JO 19-JO 30 through diodes D23-D28, and reverse-path current forms a loop through light emitting diodes LA +, LA-, LB +, LC-and LC-.
The invention has the beneficial effects.
The invention relates to thyristor phase shift control and closed-loop regulation, in particular to a digital phase-locked trigger controller for current-voltage double closed-loop regulation. The two regulators are independent, and the parameters of the regulators are independent; the output comparison of the regulators is set, and the corresponding regulators can be switched to output to the next stage circuit according to the control targets. The digital phase-locked pulse circuit is adopted to form trigger pulses, and the multipath pulses are distributed to corresponding thyristors, so that the uniformity, symmetry and consistency of the pulses are improved, and the stability of the pulses is improved.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1 is a schematic diagram of the circuit of the present invention.
Fig. 2 to 9 are partially enlarged views of fig. 1.
Fig. 10 and 20 are schematic diagrams of the controller circuit according to different use requirements.
Fig. 11 to 19 are partially enlarged views of fig. 10.
Fig. 21 to 24 are partially enlarged views of fig. 20.
Detailed Description
As shown in the figure, the invention comprises a current regulator, a voltage regulator, a power supply and synchronous circuit, a phase-shifting circuit, a digital phase-locked pulse circuit and a pulse amplifying circuit, and has the structural key points that the feedback in the current regulator is compared with the given value to carry out proportional-integral adjustment; voltage setting and voltage feedback are input to the reverse input end of the voltage regulator to carry out proportional-integral regulation;
the output phases of the current regulator and the voltage regulator are AND-fed to the phase shifting circuit; the output of the phase-shifting circuit is connected to a digital phase-locking pulse circuit, the frequency of a phase-shifting signal is doubled to form a trigger pulse, and the trigger pulse is isolated and output through a pulse amplifying circuit and a pulse transformer;
the alternating current power output end of the power supply and synchronization circuit is connected with the synchronization unit in the phase-shifting circuit; the phase sequence identification signal output end of the power supply and synchronization circuit is connected with the pulse distribution input end of the digital phase-locked pulse circuit.
And the phase-shifting signal forms 6-phase trigger pulse after frequency multiplication.
The invention also comprises a current amplifying circuit and a protection circuit, wherein the output of the current amplifying circuit is respectively connected with an overcurrent protection unit and a current regulator feedback circuit in the protection circuit.
The protection circuit comprises an overvoltage protection unit and an undervoltage protection unit.
The current amplifying circuit comprises an LM324 chip IC1A, wherein a pin 2 of the IC1A is respectively connected with one end of a resistor R88 and one end of a resistor R27, the other end of the resistor R88 is connected with a pin 2 of a jumper switch J1, pins 4 and 5 of the jumper switch J1 are connected with a pin 8 terminal, the other end of a resistor R27 is connected with a pin 1 of a jumper switch J1, a pin 3 of the jumper switch J1 is respectively connected with an anode of a diode D7, an anode of a diode D8 and an anode of a diode D9, a cathode of the diode D7 is respectively connected with a terminal Jin4 and an anode of a diode D10, a cathode of the diode D8 is respectively connected with a terminal Jin, the anode of the diode D11 is connected, the cathode of the diode D9 is connected with the anode of the terminal Jin6 and the anode of the diode D12 respectively, the anode of the diode D10 is connected with the cathode of the terminal Jin7, the anode of the diode D11, the anode of the diode D12, the ground wire and one end of the resistor R28 respectively, the other end of the resistor R28 is connected with the pin 3 of the IC1A, and the pin 1 of the IC1A is connected with the current regulator and the overcurrent protection unit in the protection circuit respectively through the resistor R1. The input terminal Jin, wherein the middle Jin4, Jin5 and Jin6 terminals are the AC transformer access ends; the Jin7 and Jin8 terminals are input ends of a direct current shunt or a direct current sensor. The current feedback type described above is selected by manually setting the position of jumper switch J1.
The protection circuit comprises an LM324 chip IC2C, an IC2B and an IC2D, wherein a pin 9 of the IC2C is connected with an adjusting end of a rheostat W7, one connecting end of a rheostat W7 is connected with a +15V power supply, and the other connecting end of the rheostat W7 is grounded through a resistor R35; the pin 10 of the IC2C is connected with the output end of the current amplification circuit through a resistor R34; the pin 8 of the IC2C is connected with the anode of a diode D16, and the cathode of a diode D16 is respectively connected with the cathode of the diode D17, the cathode of the diode D41, the input end of the current regulator, the input end of the voltage regulator and the input end of the digital phase-locked pulse circuit;
a pin 6 of the IC2B is connected with a terminal Jin9 through a resistor R102, a pin 5 of the IC2B is respectively connected with one end of a resistor R38 and one end of a resistor R39, the other end of the resistor R38 is grounded, and the other end of the resistor R39 is respectively connected with a pin 7 of the IC2B and the anode of a diode D17; jin9 is used as a pulse blocking external control input;
the pin 13 of the IC2D is connected with the adjusting end of a rheostat W4, one connecting end of the rheostat W4 is connected with a +15V power supply, and the other connecting end of the rheostat W4 is grounded through a resistor R92; the 12 feet of the IC2D are respectively connected with an NPN triode N13 collector, a diode D44 cathode and a voltage feedback input end of a voltage regulator, an NPN triode N13 emitter is grounded, an NPN triode N13 base is connected with an NPN triode N12 base, one end of a resistor R33 is connected, an NPN triode N12 emitter is grounded, an NPN triode N12 collector is connected with the 10 feet of the IC2C, and the other end of the resistor R33 is connected with a +15V power supply through a switch S1; the pin 14 of the IC2D is respectively connected with one end of a resistor R94, the anode of a diode D41 and the anode of a diode D45, the other end of the resistor R94 is connected with the anode of a diode D44, the cathode of a diode D45 is respectively connected with the cathode of a diode D46 and the base of an NPN triode N4, the anode of a diode D46 is connected with the pin 8 of the IC2C, the emitter of the NPN triode N4 is grounded, the collector of the NPN triode N4 is connected with the control end of a relay J, and the controlled end of the relay J is connected with.
IC2C is an overcurrent protection comparator, and when the feedback signal from the current amplification circuit exceeds the reference set by W7, the comparator outputs a high level and self-locks until the reset switch is closed or the power is turned on and then becomes a low level, protecting the reset. IC2D is an overvoltage protection comparator, which outputs a high level and self-locks when the voltage feedback signal exceeds the reference set by W4 until the reset switch is closed or powered on to a strong low level after power off, protecting reset. IC2B is a brown-out control power comparator. The outputs of the three kinds of protection are connected in parallel through diodes D16, D17 and D41 and then are connected with a current, a voltage regulator and a trigger. The overcurrent and overvoltage protection relay J acts.
The current regulator comprises an LM324 chip IC1C, wherein a pin 13 of the IC1C is respectively connected with a current setting input terminal Jin14 and a regulating end of a rheostat W1, one connecting end of the rheostat W1 is connected with the output end of a current amplification circuit, the other connecting end of the rheostat W1 is grounded, and a pin 12 of the IC1C is grounded through a resistor R4; the 14 pin of the IC1C is connected to the emitter of a PNP triode P4, one end of a capacitor C3, and the cathode of a diode D2, the other end of a capacitor C3 is connected to one end of a capacitor C2 and one end of a jumper switch J2, the other end of a capacitor C2 is connected to one end of a resistor R5 and the other end of a jumper switch J2 through a resistor R6, the other end of a resistor R5 is connected to the anode of a diode D6 and the power supply +15V, the cathode of a diode D6 is connected to the collector of a PNP triode P4, and the base of the PNP triode P4 is connected to the voltage regulator and the. The Jin12 is connected with the resistor R100 and the PNP triode collector, the Jin12 is used as a power supply externally connected with a given potentiometer, and the Jin15 is used as a low potential end of the power supply of the given potentiometer.
The current given input from the Jin14 terminal is connected to the inverting input terminal of the current regulator IC1C, the feedback signal from the current amplifying circuit is connected to the inverting input terminal of the IC1C after being divided by W1, and the difference between the given and the feedback is amplified by the proportional-integral of the IC 1C. A jumper switch J2 is arranged in the link, R6 and C2 are cut off by closing a J2 short circuit, and integral gain and proportional gain are reduced. During the protection operation, P4 turns on the regulation latch, and P4 forces the IC1C output to follow IC1D when the voltage regulator IC1D is in operation.
The voltage regulator comprises an LM324 chip IC1D, wherein a pin 9 of the IC1D is connected with a regulating end of a rheostat W2 through an open-loop closed-loop transfer switch S2, one connecting end of the rheostat W2 is connected with a voltage feedback signal terminal Jin11, the other connecting end of the rheostat W2 is grounded, a pin 8 of the IC1D is respectively connected with an emitter of a PNP triode P1, a cathode of a diode D5, a base of the PNP triode P1 and an anode of a diode D5 and is connected with the current regulator. Jin11 is a voltage feedback input. Jin13 is a voltage set input terminal for connecting a set potentiometer or 0-10V active voltage set signal.
The voltage given input by the Jin13 terminal is connected to the inverting input terminal of the voltage regulator IC1D, the voltage feedback signal of the Jin11 terminal is connected to the inverting input terminal of the IC1D after being divided by the W2, and the difference between the given voltage and the feedback voltage is subjected to proportional-integral amplification by the IC 1D. During the protection operation, P1 turns on the regulation lock, and when the current regulator IC1C is turned on, P1 forces the IC1D output to follow IC 1C. S2 is an open-loop and closed-loop transfer switch, when the open-loop position is set, the feedback signal is disconnected with the reverse input end of IC1D, IC1D is connected to form voltage following, and the output voltage of IC1D follows the given voltage.
The output of the current regulator IC1C is connected to diode D2; the output of voltage regulator IC1D is connected to diode D5. The output of the two regulators is in parallel connection, the circuits of the two regulators are independent, the parameters are independent, and the respective setting is not mutually involved. The voltage given and the voltage feedback are compared, and are connected to the cathode of the D5 after being amplified by the proportional-integral of the voltage regulator. The current set is compared with the current feedback, and is connected to the cathode of D2 after proportional-integral amplification by a current regulator. The anode of D5 and the anode of D2 were connected, and as a result, the output level was selected to be low.
The phase shift circuit comprises an LM324 chip IC1B, wherein 5 pins of the IC1B are respectively connected with a regulating end and a connecting end of a rheostat W3, a connecting end of a rheostat W5 and a collector of an NPN triode N1, a base electrode of an NPN triode N1 is connected with a regulating end of a rheostat W5, and an emitter electrode of the NPN triode N1 is respectively connected with the ground wire and the other connecting end of the rheostat W5; the other connecting end of the rheostat W3 is respectively connected with the output end of the current regulator and the output end of the voltage regulator;
a pin 5 of the IC1B is respectively connected with a collector of an NPN triode N2, a collector of an NPN triode N3 and one end of a capacitor C12, an emitter of the NPN triode N2 is respectively connected with a base of the NPN triode N3, the other end of the capacitor C12 and one end of a resistor R50, the other end of the resistor R50 is connected with a-15V power supply, and an emitter of the NPN triode N3 is grounded; the base of NPN triode N2 is connected with the output end of the power supply and synchronous circuit, and pin 7 of IC1B is connected with the input end of the digital phase-locked pulse circuit.
The outputs of D2 and D5 are connected to a phase shift amplitude limiting setting circuit consisting of W3 and W5. W3 defines a lower limit and adjusting W5 changes the clipping value of N1, thereby defining the maximum phase-shifted voltage. C12 is connected between C, B of N3 to improve the linearity of the capacitor charging voltage by using the Miller effect. N2 is connected to an ac power source to discharge the miller capacitance in synchronism with the power source, thereby forming a linear sawtooth wave in synchronism with the ac power source. Two inputs of the IC1B comparator are respectively from phase-shifting amplitude limiting and sawtooth wave, and the comparator outputs pulse Ain which is synchronous with the power supply and has phase modulated by phase-shifting voltage.
The power supply and synchronization circuit comprises a transformer T8, the primary side of a transformer T8 is a mains supply access end, the secondary side of a transformer T8 is connected with the input ends of a chip U3 and a chip U2 of 7915 through a rectifier bridge 7815, and the output end of a U3 is connected with the input end of a chip U1 of 7805; one end of a mains supply access end is connected with one end of the primary side of a transformer T8 and one end of a resistor RB respectively, the other end of the resistor RB is connected with one end of a capacitor C20 and one end of the input end of a phase sequence identifying rectifier respectively, the other end of the mains supply access end is connected with one end of a capacitor C17 and the other end of the input end of the phase sequence identifying rectifier respectively through a capacitor CB, the other end of a capacitor C17, the other end of a capacitor C20 and one end of the primary side of a transformer T8 are connected, the output end of the phase sequence identifying rectifier is connected with the input end of a TIL113 chip O389.
The commercial power is isolated and reduced through a single-phase alternating-current power transformer T8, is converted into direct current through a D30-D33 rectifier bridge, and forms +/-15V and +5V power supplies through three-terminal linear voltage stabilizing circuits of U1-U3. The phase-shifting networks RB, CB, C17 and C20 are used for identifying the phase sequence of the three-phase power supply, wherein the positive phase sequence O2 outputs low level, and the negative phase sequence O2 outputs low level.
The digital phase-locked pulse circuit comprises 4046 chips IC3, 16V8 chips IC6, MC7555 chips IC4, 4015 chips IC5A and IC5B, wherein 14 pins of IC3 are connected with the output end of the phase-shift circuit, 4 pins of IC3 are respectively connected with 1 pin of IC5A, 15 pins of IC5A and 9 pins of IC5B, the outputs of IC5A and IC5B are connected with the input of IC6, and the output of IC6 is connected with the input port of the pulse amplification circuit;
the pin 4 of the IC4 is respectively connected with one end of a resistor R85 and the collector of an NPN triode N5, the other end of the resistor R85 is connected with the pin 4 of the IC3, the emitter of the NPN triode N5 is grounded, the collector of the NPN triode N5 is connected with the output end of the protection circuit, and the pin 3 of the IC4 is connected with the pin 12 of the IC 6. The NPN transistor N5 is used for pulse blocking.
The phase-locked input of the phase-locked loop circuit IC3 is derived from the phase-shifted pulse Ain. The 6 multiplied pulses generate 6 independent square wave pulses with equal pulse intervals through the frequency dividing circuits IC5A and IC 5B. The IC4 is a pulse train modulation oscillation circuit, the start and stop control of oscillation is controlled by 6 paths of pulses, the front edge of the 6 paths of pulses starts oscillation, and the rear edge of the pulses stops. The modulated 6 paths of pulses are distributed in the programmable logic device IC6 from a new arrangement sequence according to a positive and negative phase sequence, and the distributed pulses are connected with corresponding triodes N6-N11 in a pulse amplifying circuit at the next stage. The pulse sequence is sent according to the result of phase sequence identification, and the result realizes the phase sequence self-adaptive function.
The pulse amplifying circuit comprises NPN triodes N6-N11, bases of NPN triodes N6-N11 are connected with the output end of the digital phase-locked pulse circuit, collectors of NPN triodes N6-N11 are respectively connected with primary sides of transformers T2-T7, emitters of the NPN triodes N6-N11 are grounded, secondary sides of the transformers T2-T7 are respectively connected to pulse output terminals JO 19-JO 30 through diodes D23-D28, reverse current passes through light emitting diodes LA +, LA-, LB +, LC-to form a loop.
The pulse is input to the base electrodes of the triodes N6-N11, the collector electrodes of the triodes are connected with pulse transformers T2-T7, the pulse transformers play a role in matching circuit voltage with thyristor trigger voltage and play a role in isolating output pulse from a control panel circuit. The isolated pulses are connected to pulse output terminals JO19 to JO30 via diodes D23 to D28. The forward stroke output by the pulse transformer is output through a pulse terminal, and the reverse stroke current forms a loop through the light emitting diodes LA +, LA-, LB +, LB-, LC + and LC-.
The circuit structures of fig. 10 and 20 can be adopted according to different use requirements.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (10)
1. The digital phase-locked thyristor phase-shifting trigger controller comprises a current regulator, a voltage regulator, a power supply and synchronous circuit, a phase-shifting circuit, a digital phase-locked pulse circuit and a pulse amplifying circuit, and has the structural key points that the feedback in the current regulator is compared with the given value to carry out proportional integral adjustment; voltage setting and voltage feedback are input to the reverse input end of the voltage regulator to carry out proportional-integral regulation;
the output phases of the current regulator and the voltage regulator are AND-fed to the phase shifting circuit; the output of the phase-shifting circuit is connected to a digital phase-locking pulse circuit, the frequency of a phase-shifting signal is doubled to form a trigger pulse, and the trigger pulse is isolated and output through a pulse amplifying circuit and a pulse transformer;
the alternating current power output end of the power supply and synchronization circuit is connected with the synchronization unit in the phase-shifting circuit; the phase sequence identification signal output end of the power supply and synchronization circuit is connected with the pulse distribution input end of the digital phase-locked pulse circuit.
2. The digital phase-locked thyristor phase-shifting trigger controller according to claim 1, further comprising a current amplification circuit and a protection circuit, wherein the output of the current amplification circuit is respectively connected with an overcurrent protection unit and a current regulator feedback circuit in the protection circuit.
3. The phase shift trigger controller of digital phase-locked thyristor according to claim 2, wherein the current amplifying circuit comprises LM324 chip IC1A, pin 2 of IC1A is connected to one end of resistor R88 and one end of resistor R27 respectively, the other end of resistor R88 is connected to pin 2 of jumper switch J1, pin 4 and pin 5 of jumper switch J1 are connected to Jin8 terminal, the other end of resistor R27 is connected to pin 1 of jumper switch J1, pin 3 of jumper switch J1 is connected to anode of diode D7, anode of diode D8 and anode of diode D9 respectively, cathode of diode D7 is connected to anode of terminal Jin4 and diode D10 respectively, cathode of diode D8 is connected to anode of terminal Jin5 and diode D11 respectively, cathode of diode D9 is connected to anode of terminal Jin6 and anode of diode D12 respectively, anode of diode D10 is connected to anode of terminal Jin7, anode of diode D11, cathode of diode D12 and one end of resistor R28 respectively, the other end of the resistor R28 is connected with the pin 3 of the IC1A, and the pin 1 of the IC1A is connected with the current regulator and the overcurrent protection unit in the protection circuit respectively through the resistor R1.
4. The phase-shift trigger controller of digital phase-locked thyristor according to claim 2, wherein the protection circuit comprises LM324 chip IC2C, IC2B, IC2D, pin 9 of IC2C is connected to the adjustment end of varistor W7, one connection end of varistor W7 is connected to +15V power supply, the other connection end of varistor W7 is grounded through resistor R35; the pin 10 of the IC2C is connected with the output end of the current amplification circuit through a resistor R34; the pin 8 of the IC2C is connected with the anode of a diode D16, and the cathode of a diode D16 is respectively connected with the cathode of the diode D17, the cathode of the diode D41, the input end of the current regulator, the input end of the voltage regulator and the input end of the digital phase-locked pulse circuit;
a pin 6 of the IC2B is connected with a terminal Jin9 through a resistor R102, a pin 5 of the IC2B is respectively connected with one end of a resistor R38 and one end of a resistor R39, the other end of the resistor R38 is grounded, and the other end of the resistor R39 is respectively connected with a pin 7 of the IC2B and the anode of a diode D17;
the pin 13 of the IC2D is connected with the adjusting end of a rheostat W4, one connecting end of the rheostat W4 is connected with a +15V power supply, and the other connecting end of the rheostat W4 is grounded through a resistor R92; the pin 12 of the IC2D is connected with the collector of the protective self-locking reset NPN triode N13, the cathode of the diode D44 and the voltage feedback input end of the voltage regulator, the emitter of the NPN triode N13 is grounded, the base of the NPN triode N13 is connected with the base of the NPN triode N12 and one end of the resistor R33, the emitter of the NPN triode N12 is grounded, the collector of the NPN triode N12 is connected with the pin 10 of the IC2C, and the other end of the resistor R33 is connected with the +15V power supply through the switch S1; the pin 14 of the IC2D is respectively connected with one end of a resistor R94, the anode of a diode D41 and the anode of a diode D45, the other end of the resistor R94 is connected with the anode of a diode D44, the cathode of a diode D45 is respectively connected with the cathode of a diode D46 and the base of an NPN triode N4, the anode of a diode D46 is connected with the pin 8 of the IC2C, the emitter of the NPN triode N4 is grounded, the collector of the NPN triode N4 is connected with the control end of a relay J, and the controlled end of the relay J is connected with.
5. The phase shift trigger controller for digital phase-locked thyristor according to claim 1, wherein the current regulator comprises an LM324 chip IC1C, pin 13 of IC1C is connected with a current setting input terminal Jin14 and a regulating terminal of a rheostat W1 respectively, a connecting terminal of the rheostat W1 is connected with an output terminal of the current amplifying circuit, the other connecting terminal of the rheostat W1 is grounded, and pin 12 of IC1C is grounded through a resistor R4; the 14 pin of the IC1C is connected to the emitter of a PNP triode P4, one end of a capacitor C3, and the cathode of a diode D2, the other end of a capacitor C3 is connected to one end of a capacitor C2 and one end of a jumper switch J2, the other end of a capacitor C2 is connected to one end of a resistor R5 and the other end of a jumper switch J2 through a resistor R6, the other end of a resistor R5 is connected to the anode of a diode D6 and the power supply +15V, the cathode of a diode D6 is connected to the collector of a PNP triode P4, and the base of the PNP triode P4 is connected to the voltage regulator and the.
6. The digital phase-locked thyristor phase-shifting trigger controller as claimed in claim 1, wherein the voltage regulator comprises an LM324 chip IC1D, pin 9 of IC1D is connected to a regulating terminal of a varistor W2 through an open-loop and closed-loop transfer switch S2, one connecting terminal of varistor W2 is connected to a voltage feedback signal terminal Jin11, the other connecting terminal of varistor W2 is connected to ground, pin 8 of IC1D is connected to an emitter of a PNP triode P1, a cathode of a diode D5, a base of the PNP triode P1, and an anode of a diode D5 is connected to the current regulator.
7. The digital phase-locked thyristor phase-shifting trigger controller as claimed in claim 1, wherein the phase-shifting circuit comprises an LM324 chip IC1B, pins 5 of IC1B are respectively connected with a regulating terminal and a connecting terminal of a rheostat W3, a connecting terminal of a rheostat W5 and a collector of an NPN triode N1, a base of the NPN triode N1 is connected with a regulating terminal of a rheostat W5, and an emitter of the NPN triode N1 is respectively connected with a ground wire and the other connecting terminal of the rheostat W5; the other connecting end of the rheostat W3 is respectively connected with the output end of the current regulator and the output end of the voltage regulator;
a pin 5 of the IC1B is respectively connected with a collector of an NPN triode N2, a collector of an NPN triode N3 and one end of a capacitor C12, an emitter of the NPN triode N2 is respectively connected with a base of the NPN triode N3, the other end of the capacitor C12 and one end of a resistor R50, the other end of the resistor R50 is connected with a-15V power supply, and an emitter of the NPN triode N3 is grounded; the base of NPN triode N2 is connected with the output end of the power supply and synchronous circuit, and pin 7 of IC1B is connected with the input end of the digital phase-locked pulse circuit.
8. The phase-shifting trigger controller of the digital phase-locked thyristor according to claim 1, wherein the power supply and synchronization circuit comprises a transformer T8, the primary side of the transformer T8 is the commercial power input end, the secondary side of the transformer T8 is connected to the input end of a chip U3 and a chip U2 through a rectifier bridge 7815 and 7915, and the output end of U3 is connected to the input end of a chip U1 of 7805; one end of a mains supply access end is connected with one end of the primary side of a transformer T8 and one end of a resistor RB respectively, the other end of the resistor RB is connected with one end of a capacitor C20 and one end of the input end of a phase sequence identifying rectifier respectively, the other end of the mains supply access end is connected with one end of a capacitor C17 and the other end of the input end of the phase sequence identifying rectifier respectively through a capacitor CB, the other end of a capacitor C17, the other end of a capacitor C20 and one end of the primary side of a transformer T8 are connected, the output end of the phase sequence identifying rectifier is connected with the input end of a TIL113 chip O389.
9. The phase-shift trigger controller of digital phase-locked thyristor according to claim 1, wherein the digital phase-locked pulse circuit comprises 4046 chip IC3, 16V8 chip IC6, MC7555 chip IC4 and 4015 chip IC5A, IC5B, 14 pins of IC3 are connected with the output end of the phase-shift circuit, 4 pins of IC3 are respectively connected with 1 pin of IC5A, 15 pins of IC5A and 9 pins of IC5B, the outputs of IC5A and IC5B are connected with the input of IC6, and the output of IC6 is connected with the input port of the pulse amplifying circuit;
the 4 pins of the IC4 are respectively connected with one end of a resistor R85 and the collector of an NPN triode N5, the other end of the resistor R85 is connected with the 4 pins of the IC3, the emitter of the NPN triode N5 is grounded, the collector of the NPN triode N5 is connected with the output end of the protection circuit, and the 3 pin of the IC4 is connected with the 12 pin of the IC 6;
and the phase-shifting signal forms 6-phase trigger pulse after frequency multiplication.
10. The digital phase-locked thyristor phase-shifting trigger controller as claimed in claim 1, wherein the pulse amplifying circuit comprises NPN transistors N6-N11, bases of NPN transistors N6-N11 are connected to the output terminal of the digital phase-locked pulse circuit, collectors of NPN transistors N6-N11 are respectively connected to primary sides of transformers T2-T7, emitters of NPN transistors N6-N11 are grounded, secondary sides of transformers T2-T7 are respectively connected to pulse output terminals JO 19-JO 30 via diodes D23-D28, and reverse current passes through light emitting diodes LA +, LB, LC +, and LC-to form a loop.
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