CN103296903A - Direct-current silicon commutating power supply - Google Patents
Direct-current silicon commutating power supply Download PDFInfo
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- CN103296903A CN103296903A CN2013102070273A CN201310207027A CN103296903A CN 103296903 A CN103296903 A CN 103296903A CN 2013102070273 A CN2013102070273 A CN 2013102070273A CN 201310207027 A CN201310207027 A CN 201310207027A CN 103296903 A CN103296903 A CN 103296903A
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Abstract
The invention discloses a direct-current power supply circuit comprising a major loop, a control loop and a control protecting loop. The major loop is connected and disconnected with a power supply through an air switch and is controlled by a contactor, a three-phase fully-controlled bridge commutating alternating-current voltage regulating circuit is formed by thyristors through a mutual inductor and inputs to a primary side of a transformer, and a three-phase bridge uncontrollable commutating circuit is formed on a secondary side of the transformer through diodes. The control circuit is under relay control and composed of relays, time relays, control buttons and indicator lamps and functions in commutating control, fault actions and indication. By the electric and electronic technology, the protecting loop and the trigger circuit are built, and the protecting loop is provided with functions of voltage stabilizing, current stabilizing, closure and soft start and functions of phase-default protection, overcurrent protection, overvoltage protection and short-circuit protection. By the digital trigger circuit, synchronous detection, phase shift, pulse formation, pulse screening and amplifying of control signals are realized. By the direct-current power supply circuit, reliability of a direct-current silicon commutating power supply is improved.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to a kind of DC power supply generating means, particularly a kind of direct current silicon commutating power supply.
Background technology
DC power supply is widely used in industrial or agricultural and civilian installation.Particularly electroplate, the electrolysis industry.Three-phase controlled rectifier circuit is to utilize electric electronic current change technology, and the three phase sine alternating current is become adjustable stably unidirectional direct current by rectifier cell.The rectifier bridge that rectifying device mainly adopts thyristor to build, thyristor have single-phase conduction, and after thyristor added the forward anode voltage, gate pole added suitable forward gate voltage, made the thyristor turn on process be called triggering.In case after the thyristor triggering and conducting, gate pole as long as add a direct impulse voltage usually on gate pole, is called trigger voltage just to its effect out of hand.
Utilize this specific character of thyristor, thyristor by certain composition of relations, is made alternating current single-phase by thyristor circuit, thereby realizes rectification.In the rectification circuit, the most important thing is, send pulse signal in the suitable moment to the main circuit thyristor, make the thyristor conducting, therefore, circuits for triggering are rectification key of success.At present, circuits for triggering mainly contain the simulation triggering and trigger two kinds with numeral.Concerning analog thyristor trigger, commonly used can be divided into sine wave again synchronously and two synchronous extended familys of sawtooth waveforms.Adopt sinusoidal wave synchronous trigger, tighter owing to synchronizing signal amplitude and sinusoidal wave waveform are required, less application nowadays, and the synchronous analog trigger of sawtooth waveforms has obtained application very widely in current thyristor power electronic equipment.Yet this trigger is owing to charge to obtain sawtooth waveforms by constant-current source to electric capacity, often electric capacity and constant-current source output current just are set at definite value in trigger manufacturing process, when the synchronizing voltage frequency reduces, then the sawtooth waveforms width increases, charging interval is elongated, cause the sawtooth waveforms amplitude to increase, on the contrary when the synchronizing voltage frequency raises, the sawtooth waveforms narrowed width, charging interval shortens, cause the sawtooth waveforms amplitude to reduce, therefore, when phase shift controlling voltage one timing, because synchronizing voltage frequency change, the pilot angle that causes exporting trigger impulse is inequality, just is difficult to reach the requirement of stable output, is difficult to the variation of adaptation synchronizing voltage frequency naturally
On the other hand, existing three phase controlled rectifier circuit at a time needs to trigger simultaneously 2 thyristors and falls logical.If pulse duration is too small, causes easily and trigger failure.The employing broad pulse triggers, and pulse duration is greater than 60 degree, and it is relatively poor to adopt broad pulse to trigger this circuits for triggering pulse front edge steepness, and device power consumption is big, needs the shortcomings such as pulse transformer of large volume.
Summary of the invention
At the defective that exists in the above-mentioned prior art or deficiency, the objective of the invention is to, a kind of direct current silicon commutating power supply is provided, main circuit adopts three-phase thyristor bridge rectification circuit and controlled bridge-type rectification circuit not, build control loop with relay, the time relay, realize the logic control of circuit; Adopting power electronic technology, utilize power amplifier, semiconductor element and electronic chip to build protection loop and thyristor trigger, is a kind of high-current dc power supply device.
To achieve these goals, the present invention adopts following technical solution:
A kind of direct current silicon commutating power supply comprises major loop, Relay-controlled Circuit, protective circuit and circuits for triggering; Wherein, described Relay-controlled Circuit, protective circuit and circuits for triggering are connected major loop respectively, and Relay-controlled Circuit connects protective circuit, and protective circuit is connected with circuits for triggering.
Further, described major loop comprises that three-phase alternating-current supply, contactor, D.C mutual-inductor, thyristor exchange regulator, three-phase transformer and three-phase bridge rectifier circuit; Wherein, described three-phase alternating-current supply connects three D.C mutual-inductors by contactor, the D.C mutual-inductor lower end connects thyristor respectively and exchanges regulator, and thyristor exchanges the described three-phase transformer of the common connection in lower end of regulator, and three-phase transformer connects described three-phase bridge rectifier circuit.
Further, the power supply of described major loop is three-phase alternating-current supply, and the A phase of three-phase alternating-current supply, B install three-phase air switch S mutually with C mutually
o, three-phase air switch S
oLower end A1, B1 and C1 all with contactor K
0Main contacts link to each other; Contactor K
0Main contacts lower end A2, B2 be connected D.C mutual-inductor T respectively with C2
4, T
5And T
6D.C mutual-inductor T
4Secondary side connecting resistance R4 is in case the D.C mutual-inductor secondary circuit short-circuit; D.C mutual-inductor T
5Secondary side connecting resistance R5, D.C mutual-inductor T
6Secondary side connecting resistance R6; D.C mutual-inductor T
4, T
5And T
6The lower end be respectively A3, B3 and C3, A3, B3 are connected to a thyristor respectively with the C3 lower end and exchange regulator, specifically connect as follows: from A3 three circuit in parallel, article one circuit connects the anode of thyristor V1 from A3, the negative electrode of thyristor V1 meets A4, the X11 of gate pole g1 contact Power Generation Road; The second circuit is resistance-capacitance circuit, and the second circuit connects capacitor C 1 from A3, capacitor C 1 other end connecting resistance R1, and resistance R 1 another termination A4, this resistance-capacitance circuit is used for suppressing the internal cause overvoltage, comprises the commutation overvoltage and turn-offs overvoltage; Article three, circuit connects the negative electrode of thyristor V4 from A3, and the anode of thyristor V4 meets A4, the X41 of gate pole g4 contact Power Generation Road.In like manner, from B3 three circuit in parallel, article one circuit connects the anode of thyristor V3 from B3, and the negative electrode of thyristor V3 meets B4, the X31 of gate pole g3 contact Power Generation Road; The second circuit connects capacitor C 2 from B3, capacitor C 2 other end connecting resistance R2, resistance R 2 another termination B4; Article three, circuit connects the negative electrode of thyristor V6 from B3, and the anode of thyristor V6 meets B4, the X61 of gate pole g6 contact Power Generation Road; From C3 three circuit in parallel, article one circuit connects the anode of thyristor V5 from C3, and the negative electrode of thyristor V5 meets C4, the X51 of gate pole g5 contact Power Generation Road; The second circuit connects capacitor C 3 from C3, capacitor C 3 other end connecting resistance R3, resistance R 3 another termination C4; Article three, circuit connects the negative electrode of thyristor V2 from C3, and the anode of thyristor V2 meets C4, the X21 of gate pole g2 contact Power Generation Road; The gate pole of above-mentioned 6 thyristor V1-V6 is pressed the V1-V6 sequential turn-on, and the adjacent two thyristor conduction phase angle in front and back differ from 60 degree;
Lower end A4, B4, the C4 of three thyristor interchange regulators all are connected with three-phase transformer T1, and three-phase transformer T1 primary side adopts delta connection from beginning to end, and three-phase transformer T1 secondary side A5, B5, C5 also adopt delta connection from beginning to end;
Three-phase transformer T1 output termination three-phase bridge rectifier circuit.This three-phase bridge rectifier circuit has six brachium pontis, from A5 parallel diode V11 and V14, from B5 parallel diode V13 and V16, from C5 parallel diode V15 and V12, wherein the output of diode V11, V13, V15 is total to anode, the output common cathode of diode V14, V16, V12.
100 with 101 o'clock between three branch roads in parallel, wherein, article one branch road meets slide rheostat RP1 from 100, this slide rheostat RP1 is in order to the flow valuve of adjusting, adjust in rated current 1.1 times, the following terminating resistor R7 of rheostat RP1, following termination 101 points of resistance R 7; The second branch road is from 100 connecting resistance R8, following termination 103 points of resistance R 8; Article three, branch road meets voltmeter PV, another termination 101 points of voltmeter PV from 100.
Further, the structure of described Relay-controlled Circuit is as follows:
From 6 branch roads below the secondary side parallel connection of control transformer T3:
Article one, branch road meets contactor K from 270
0Auxiliary normally-closed contact upper end, contactor K
0Auxiliary normally-closed contact under termination red led HR1, following termination 239 points of red led HR1, this branch road realize shutting down indication;
The second branch road meets contactor K from 270
0Auxiliary normally opened contact upper end, contactor K
0Auxiliary normally opened contact under termination green indicating lamp HG1, following termination 239 points of green indicating lamp HG1, this branch road are realized the operation indication;
Article three, branch road meets making button S from 270
2, realize the startup of control device, making button S
2Carry out parallel connection as required, realize execute-in-place and remote operation various modes.Making button S
2One of lower end guide 113 points into, as making button S
2Power making button S to the operation indication during action
2Another branch road of lower end meet disconnected button S
1, realize stopping of control device, moving disconnected button S
1Connect as required, realize execute-in-place and remote operation various modes.Two moving disconnected button S of series connection in the present embodiment
1, each moving disconnected button S
1Following relay termination K
2The upper end of auxiliary normally-closed contact, relay K
2The following termination time relay κ of auxiliary normally-closed contact
1Coil, time relay κ
1Following termination 239 points of coil; Time relay K
1Auxiliary normally-closed contact insert and 274 points of protective circuit respectively at 273, this branch road is realized power supply on/off switch;
Article four, branch road is from 270 auxiliary normally opened contacts that connect the relay K of protective circuit, the following relay termination K of the auxiliary normally opened contact of relay K
2Coil, relay K
2Following termination 239 points of coil, relay K
2Auxiliary normally opened contact insert and 274 points respectively at 273, this branch road is realized fault actions;
Article five, branch road is from the upper end of 270 water receiving pressure sensor KL, the normally closed point in the lower end of water pressure sensor KL connects 271 points, the lower end normal opened contact of water pressure sensor KL connects the upper end of yellow indicator lamp HY, and following termination 239 points of yellow indicator lamp HY are as the indication of thyristor cooling water hydraulic pressure;
Article six, branch road is succeeded electrical equipment K from 270
2Auxiliary normally opened contact, relay K
2Auxiliary normally opened contact under termination red led HR2, following termination 239 points of red led HR2, this branch road is realized faulty indication;
Control circuit is from 268 and 269 access making button S of protective circuit
3, this branch road realizes that fault resets;
From major loop A1 point relay K turn-on time
1Time-delay open the instantaneous normally opened contact that closes, time relay K
1Time-delay open 308 of the instantaneous lower ends of closing of often opening, contact and meet contactor K
0Coil, contactor K
0The following termination main circuit B1 point of coil.
Further, the next primary side that leads to control transformer T3 since B1 and the C1 of major loop of the power supply of described Relay-controlled Circuit; The voltage of three kinds of grades of secondary side output of control transformer T3 is respectively and exchanges 24V, exchanges 6.3V and exchanges 5V.
Compared with prior art, the present invention has following advantage:
1) adopt chip and element to build circuit jointly, compact conformation has dwindled equipment volume, is easy to change.There is not complex mechanical construction, the work friction, noise is little;
2) adopt the kinds of protect measure, effectively protect faults such as phase shortage, overcurrent, overvoltage, short circuit;
3) technology maturation, the reliability height has quite high conversion efficiency.In frequent especially start and the stopping process, efficient is lossless, but energy savings;
4) the DC adjustment scope is big.The user can adjust flexibly according to loading condition.
5) start conveniently, adopt soft starting mode, impact little to electrical network.
6) can carry out manual and automatic two kinds of operations, mode is flexible.
Description of drawings
Fig. 1 is system schematic of the present invention.
Fig. 2 is the schematic diagram of major loop of the present invention.
Fig. 3 is the schematic diagram of Relay-controlled Circuit of the present invention.
Fig. 4 is the protective circuit schematic diagram.
Fig. 5 is the circuits for triggering schematic diagrams.
Fig. 6 is the oscillogram of each sampled point of circuits for triggering.
Below in conjunction with the drawings and specific embodiments the present invention is further explained.
Embodiment
Direct current silicon commutating power supply of the present invention comprises major loop, Relay-controlled Circuit, protective circuit and circuits for triggering; Wherein, described Relay-controlled Circuit, protective circuit and circuits for triggering are connected major loop respectively, and Relay-controlled Circuit connects protective circuit, and protective circuit is connected with circuits for triggering.Relay-controlled Circuit, protective circuit and circuits for triggering are used for major loop is controlled, and make major loop output user's required voltage and electric current, realize the protection of major loop simultaneously.
Major loop:
As shown in Figure 1 and Figure 2, the power supply of described major loop is three-phase alternating-current supply, and the A phase of three-phase alternating-current supply, B install three-phase air switch S mutually with C mutually
o, three-phase air switch S
oLower end A1, B1 and C1 all with contactor K
0Main contacts link to each other, with to main circuit power supply; Contactor K
0Main contacts lower end A2, B2 be connected D.C mutual-inductor T respectively with C2
4, T
5And T
6D.C mutual-inductor T
4Secondary side connecting resistance R4 is in case the D.C mutual-inductor secondary circuit short-circuit; D.C mutual-inductor T
5Secondary side connecting resistance R5, D.C mutual-inductor T
6Secondary side connecting resistance R6; D.C mutual-inductor T
4, T
5And T
6The lower end be respectively A3, B3 and C3, A3, B3 are connected to a thyristor respectively with the C3 lower end and exchange regulator, concrete connection is as follows: from A3 three circuit in parallel, article one, circuit connects the anode of thyristor V1 from A3, the negative electrode of thyristor V1 connects A4(and K1 same point), the X11 of gate pole g1 contact Power Generation Road; The second circuit is resistance-capacitance circuit, and the second circuit connects capacitor C 1 from A3, capacitor C 1 other end (107 point) connecting resistance R1, and resistance R 1 another termination A4, this resistance-capacitance circuit is used for suppressing the internal cause overvoltage, comprises the commutation overvoltage and turn-offs overvoltage; Article three, circuit connects the negative electrode of thyristor V4 from A3 (with the K4 same point), and the anode of thyristor V4 meets A4, the X41 of gate pole g4 contact Power Generation Road.In like manner, from B3 three circuit in parallel, article one circuit connects the anode of thyristor V3 from B3, and the negative electrode of thyristor V3 meets B4 (with the K3 same point), the X31 of gate pole g3 contact Power Generation Road; The second circuit connects capacitor C 2 from B3, capacitor C 2 other ends (108 point) connecting resistance R2, resistance R 2 another termination B4; Article three, circuit connects the negative electrode of thyristor V6 from B3 (with the K6 same point), and the anode of thyristor V6 meets B4, the X61 of gate pole g6 contact Power Generation Road; From C3 three circuit in parallel, article one circuit connects the anode of thyristor V5 from C3, and the negative electrode of thyristor V5 meets C4 (with the K5 same point), the X51 of gate pole g5 contact Power Generation Road; The second circuit connects capacitor C 3 from C3, capacitor C 3 other ends (109 point) connecting resistance R3, resistance R 3 another termination C4; Article three, circuit connects the negative electrode of thyristor V2 from C3 (with the K2 same point), and the anode of thyristor V2 meets C4, the X21 of gate pole g2 contact Power Generation Road; The gate pole of above-mentioned 6 thyristor V1-V6 is pressed the V1-V6 sequential turn-on, and the adjacent two thyristor conduction phase angle in front and back differ from 60 degree, because rectified waveform is pulsed 6 times in one-period, therefore is called 6 pulse wave rectifiers.
Lower end A4, B4, the C4 of three thyristor interchange regulators all are connected with three-phase transformer T1, and three-phase transformer T1 primary side adopts delta connection from beginning to end, and three-phase transformer T1 secondary side A5, B5, C5 also adopt delta connection from beginning to end.
Three-phase transformer T1 output termination three-phase bridge rectifier circuit.This three-phase bridge rectifier circuit has six brachium pontis, from A5 parallel diode V11 and V14, from B5 parallel diode V13 and V16, from C5 parallel diode V15 and V12, wherein the output of diode V11, V13, V15 (100 point) is total to anode, the output of diode V14, V16, V12 (101 point) common cathode.
100 with 101 o'clock between three branch roads in parallel, wherein, article one branch road meets slide rheostat RP1 from 100, this slide rheostat RP1 is in order to the flow valuve of adjusting, adjust in rated current 1.1 times, the lower end of rheostat RP1 (103 point) connecting resistance R7, following termination 101 points of resistance R 7; The second branch road is from 100 connecting resistance R8, following termination 103 points of resistance R 8; Article three, branch road meets voltmeter PV, another termination 101 points of voltmeter PV from 100.
Relay-controlled Circuit:
As Fig. 1, shown in Figure 3, described Relay-controlled Circuit is shut down indication in order to realize comprising, is moved indication, power supply on/off switch, fault actions, hydraulic pressure indication, faulty indication, fault reset function.
Each indicator light rated voltage is for exchanging 24V in the bang-bang circuit, and each relay, time relay coil rated voltage are for exchanging 24V, contactor K
0Coil rating voltage be 380V.The next primary side that leads to control transformer T3 since B1 and the C1 of major loop of Relay-controlled Circuit power supply.The voltage of three kinds of grades of the secondary side of control transformer T3 output is respectively (and 239 points) at 270 and exchanges 24V, powers to control loop, and (18 with 19 points) exchange 6.3V and exchange 5V at 19 with (with 20 points).
The structure of control circuit is specific as follows: from the secondary side (270 point) of control transformer T3 following 6 branch roads in parallel:
Article one, branch road meets contactor K from 270
0Auxiliary normally-closed contact upper end, contactor K
0Auxiliary normally-closed contact lower end (111 point) meet red led HR1, following termination 239 points of red led HR1 constitute to be shut down deixis.
The second branch road meets contactor K from 270
0Auxiliary normally opened contact upper end, contactor K
0Auxiliary normally opened contact lower end (113 point) meet green indicating lamp HG1, following termination 239 points of green indicating lamp HG1 constitute the operation deixis.
Article three, branch road meets making button S from 270
2, realize the startup of control device, making button S
2Carry out parallel connection as required, realize execute-in-place and remote operation various modes.Making button S
2One of lower end guide 113 points into, as making button S
2Power making button S to the operation indication during action
2Another branch road of lower end meet disconnected button S
1, realize stopping of control device, moving disconnected button S
1Connect as required, realize execute-in-place and remote operation various modes.Two moving disconnected button S of series connection in the present embodiment
1, each moving disconnected button S
1Lower end (117 point) succeed electrical equipment K
2The upper end of auxiliary normally-closed contact, relay K
2The following termination time relay κ of auxiliary normally-closed contact
1Coil, time relay κ
1Following termination 239 points of coil; Time relay K
1Auxiliary normally-closed contact insert and 274 points of protective circuit respectively at 273, this branch road is realized power supply on/off switch.
Article four, branch road is from 270 auxiliary normally opened contacts that connect the relay K of protective circuit, and the lower end of the auxiliary normally opened contact of relay K (271 point) succeeds electrical equipment K
2Coil, relay K
2Following termination 239 points of coil, relay K
2Auxiliary normally opened contact insert and 274 points respectively at 273.This branch road is realized the fault actions function.
Article five, branch road is from the upper end of 270 water receiving pressure sensor KL, the normally closed point in the lower end of water pressure sensor KL connects 271 points, the lower end normal opened contact of water pressure sensor KL connects the upper end (121 point) of yellow indicator lamp HY, following termination 239 points of yellow indicator lamp HY are as the indication of thyristor cooling water hydraulic pressure.
Article six, branch road is succeeded electrical equipment K from 270
2Auxiliary normally opened contact, relay K
2Auxiliary normally opened contact lower end (125 point) meet red led HR2, following termination 239 points of red led HR2.This branch road is realized faulty indication.
Control circuit is from 268 and 269 access making button S of protective circuit
3, realize that fault resets.
From major loop A1 point relay K turn-on time
1Time-delay open the instantaneous normally opened contact that closes, time relay K
1Time-delay open 308 of the instantaneous lower ends of closing of often opening, contact and meet contactor K
0Coil, contactor K
0The following termination main circuit B1 point of coil.
The Relay-controlled Circuit operating process is as follows:
As main circuit air switch S
oAfter the closure, phase line B1 and C1 must exchange the line voltage of 380V, become the control power supply that exchanges 24V through control transformer T3 and power to control loop.Halt indicator HR1 gets electric bright.If all circuit does not have fault, be in normal condition, thyristor cooling water hydraulic pressure is normal, and the hydraulic pressure indicator light is bright, then can start-up circuit.When pressing making button S
2, time relay K
1Coil gets electric, time relay K
1Instantaneous normally opened contact closure of closing, contactor K are opened in time-delay
0Coil gets electric, contactor K
0The main circuit closure, main circuit gets electric, time relay K
1Auxiliary normally-closed contact disconnect, protective circuit starts, each circuit start.Behind the circuit start, regulate rectified value by slide rheostat RP2.
When pressing moving disconnected button S
1, time relay K
1Coil losing electricity, time relay K
1The instantaneous normally opened contact Time Delay Opening that closes, contactor K are opened in time-delay
0Coil time-delay dead electricity, contactor K
0Time-delay main circuit dead electricity, contactor K
0The auxiliary contact closure, all circuit stop.
Under the thyristor cooling water hydraulic pressure normal condition, the closing of contact of transducer KL, the hydraulic pressure indication is normal, otherwise, contacting 271 points of transducer KL, relay K
2Coil gets electric, relay K
2Auxiliary normally-closed contact is opened, and the on/off switch circuit of cutting off the electricity supply is assisted the normally opened contact closure simultaneously, 273 and 274 points of short circuit protective circuit, and circuit stops.
Other faults appear in circuit, as situations such as phase shortage, overvoltage, overcurrent, short circuit, the normally opened contact closure of the relay K of protective circuit, relay K
2Coil gets electric, and the fault actions circuit is connected.Relay K
2Auxiliary auxiliary normally-closed contact disconnect the on/off switch circuit of cutting off the electricity supply, relay K
2Auxiliary normally opened contact closure, 273 and 274 points of short circuit protective circuit, circuit stops.
After fault is got rid of, press making button S
3, 268 and 269 connections of protective circuit, fault resets, and can restart circuit this moment, otherwise circuit can not start.
Protective circuit:
As shown in Figure 1; draw synchrotrans T2 from main circuit A1, B1 and C1; synchrotrans T2 primary side and secondary side all adopt Y-connection; the 380V AC power of synchrotrans T2 input goes out the DC power supply of 15V by the uncontrollable circuit rectification of three-phase bridge; power output end is 241,242,243,240 points; connect protective circuit and circuits for triggering respectively, for the power supply of protective circuit and circuits for triggering and synchronizing signal is provided.
As Fig. 1, shown in Figure 4, the port numbering 24bz of protective circuit connects 241 points of synchrotrans T2, and numbering 26bz connects 242 points of synchrotrans T2, and numbering 28bz connects 243 points of synchrotrans T2, and numbering 30bz connects 240 points of synchrotrans T2; Numbering 18bz connects 282 points of slide rheostat RP1, and numbering 20bz connects 281 points of slide rheostat RP1, and part 18d connects 280 points of slide rheostat RP1, adjusts as voltage; Switch S is selected in numbering 12bz selecting
4278 points, switch S is selected in numbering 14bz selecting
4279 points, switch S is selected in numbering 14d selecting
4277 points, switch S is selected in the 16d selecting
4283 points, select as manual voltage stabilization and current stabilization; 8bz meets contactor K
0Auxiliary normally-closed contact 274 points, 8d meets contactor K
0Auxiliary normally-closed contact 273 points; 2bz connection control circuit 270 points, 4bz connection control circuit 271 points are in order to realize the fault actions of circuit; 284 points of switch S 4 are selected in the 2d selecting, and 4d and 6d connect the two ends (and 269 points) of making button S3 at 268, realize the fault reset function.10d connects main circuit 275 points, and 12d connects main circuit 276 points, as current detecting; 20d connects the 2bz port (244 point) of digital flip flop.
Protective circuit inside comprises phase shortage test section, over-current detection part, overvoltage test section, electric current amplifier section, dam and adjuster part, given integral part.
Element DF783A is the core devices of lack detection circuit, is numbered D2 in the circuit diagram.When phase shortage, 9 pin of D2 are output as the bright indication phase shortage of 0, V41 red light, and the output of blocking the amplifier N8 of amplifier N7 and given integrating circuit simultaneously makes pulse move on to 150 ° and realizes the inversion of this bridge, and makes relay K timing closing through D1, sends fault-signal.
Amplifier N3, N4 are respectively over-current detection circuit and over-voltage detection circuit core devices, all adopt the LM741 chip.When overcurrent or overvoltage, 6 pin of N3 or N4 are output as 0, at this time the V20 red light is bright or the V32 red light is bright, indication overcurrent or overvoltage, block the output of the amplifier N8 of adjuster N7 and given integrating circuit simultaneously, make trigger impulse move to 150 ° and realize the inversion of this bridge, and make relay timing closing through D1, send fault-signal.Wherein, slide rheostat RP1 is in order to the flow valuve of adjusting, adjust into rated current 1.1 times of the present invention.Slide rheostat RP2 is in order to the overpressure value of adjusting, adjust into rated voltage 1.1 times of the present invention.
N5 is the core devices of current amplification circuit, adopts the LM741 chip.To send into No. 3 pins of N5 from the 75mV signal (and 276 points) of shunt at 275, be amplified to 4～6V through N5.Current signal after amplifying from No. 6 pins output of N5.
N7 dams and the core devices of adjuster circuit, adopts the LM741 chip.Current signal amplifies the back through N5 and compares with the RP6 setting value, and when surpassing set-point, the 1 pin output " 1 " of N7 changes the operating state of adjuster to adjuster, and the voltage U k of 14 pin of N7 is clamped down in the scope of setting, realizes damming.When not reaching the RP6 setting value, the 1 pin output pact-14V of N7, the reverse bias of V37 is equivalent to open circuit, at this time if exist for a certain reason, main circuit output voltage U d is risen or decline, then feedback signal is by 278 10 pin that are added to N7, the 8 pin current potentials of N7 are raise or reduction, and then make the voltage U k of 14 pin of N7 reduce or increase, pilot angle α increases or reduces, Ud is descended or rising, to keep metastable state.
N8 is given integrating circuit core devices, adopts the LM741 chip.Be used for the given signal of potentiometer is cushioned, realize slowly given, i.e. soft start.Regulate RP7 and can change its time of integration, regulate RP3 its bottoming of adjusting, regulate RP4 its output upper limit of can adjusting.
Circuits for triggering:
The synchronizing signal of circuits for triggering is provided by external circuit synchrotrans T2, through RC resistance capacitance filtering and relatively amplification, find out the triggering synchronous cycle signal zero-cross point, delayed time by digit counter, timer triggers pulsewidth and carries out high frequency modulated, and the gate leve of at last trigger impulse that produces being sent into each thyristor of main circuit triggers.
As Fig. 1, shown in Figure 5, the port 2d of described circuits for triggering connects 240 points of synchrotrans T2, and 4d connects 241 points of synchrotrans T2, and 6d connects 242 points of synchrotrans T2, and 8d connects 243 points of synchrotrans T2, and 248 points of switch S 4 are selected in the 10d selecting.2bz is connected with protective circuit (wire size 244 points).4bz meets the D.C mutual-inductor T of main circuit power A phase
4245 points, 6bz meets the D.C mutual-inductor T of main circuit B phase
5246 points, 8bz meets the AC voltage transformer T of main circuit C phase
6247 points; X11 meets the gate pole g1 of the thyristor V1 of main circuit A phase, and X12 connects the K1 point of main circuit A phase; X21 meets the gate pole g2 of main circuit C phase thyristor V2, and X22 connects the K2 point of main circuit C phase; X31 meets the gate pole g3 of the thyristor V3 of main circuit B phase, and X32 connects the K3 point of main circuit B phase; X41 meets the gate pole g4 of the thyristor V4 of main circuit A phase, and X42 connects the K4 point of main circuit A phase; X51 meets the gate pole g5 of the thyristor V5 of main circuit C phase, and X52 connects the K5 point of main circuit C phase; X61 meets the gate pole g6 of the thyristor V6 of main circuit B phase, and X62 connects the K6 point of main circuit B phase.These the 6 groups triggering outputs as the thyristor of main circuit.
As shown in Figure 6, the circuits for triggering principle is as follows:
TPA, TPB, TPC, TP0 are respectively synchronizing signal, and the sampled point waveform as shown in Figure 4, and is consistent with power supply wave shape.After the capacitance-resistance phase shift, to this circuit of chip 324(employing LM324), LM324 is the four-operational amplifier that has differential input, in circuit diagram, number N2, this chip is as zero-crossing comparator, output waveform forms square wave through 324, adopt the CD40106 chip through this circuit of inverter chip 40106(again, six Schmidt triggers) shaping, chip 40106 is made up of six Schmitt trigger circuits, circuit diagram numbering D11, the TP4 of sampled point waveform such as Fig. 4, TP5, TP6, be positive phase time at power supply, waveform is and the synchronous square wave of power supply.Deliver to pulse-shaping stage after the shaping.Before the shaping with shaping after signal deliver to 3 two these circuit of input NOR gate 4001(that the circuit diagram numbering is respectively D5, D8, D12 and adopt CD4001 42 input NOR gate chips), (this circuit adopts the CD4020 chip by 3 4020 chips, 14 grades of serial binary counting/frequency dividers) frequency division, they be numbered D6, D9, D13; Chip 4020 is accepted the signal from chip 4001 on the one hand, accepts the burst signal from the conversion of V/F voltage-frequency on the one hand, the TP7 of V/F voltage-frequency conversion sampled point waveform such as Fig. 4.Export 6 road rectangular pulses, the TP11 of sampled point waveform such as Fig. 2, TP12, TP13 from 10 pin and 4 pin of D5, D8, D12.Change the pilot angle of trigger impulse by phase shift controlling voltage, D3 wherein is accurate voltage-frequency converter spare, selects model AD650 for use.When the 9 pin current potentials of D3 and 15～0V between when changing, pilot angle α changes between 0～150 °, therefore, only needs to regulate a given potentiometer and just can easily change pilot angle, thereby control the conducting interval of thyristor element, has realized the adjusting of output voltage.
Through 3 556 chips (this circuit adopts NE556) shaping pulse modulation Fixed width (the circuit diagram numbering is respectively D7, D10, D14), the TP8 of sampled point waveform such as Fig. 4 is a series of pulses.556 2 pin and 6 pin also connect the prime input, 2 pin judgment thresholds, 6 pin are as triggering, 8 pin and 12 pin also connect the input signal of prime, 12 pin judgment thresholds, and 8 pin are as triggering, 5 pin and 9 pin connect output signal, 1 pin and 7 pin ground connection, 4 pin and 10 pin receive from this circuit of chip 555(and adopt NE555) reset signal of timer, 14 pin are chip powers.
Form multi-resonant oscillating circuit (circuit diagram numbering D4) by 555 timers, produce pulse signal, this chip can reduce the volume of trigger impulse transformer.1 pin ground connection, 8 pin connect chip power.2 pin are KJ041(circuit diagram numbering D15) trigger end, 3 pin are output signals of 555, reset to 556.4 pin are 555 self reset signals.7 pin sending and receiving light diode HL1.
The inner integrated KJ041 of digital flip flop, realize the sampling of circuit, synchronously, pulse shaping, pulse phase shift, pulse shaping, pulse sorting and pulse amplify.It by 12 diodes constitute 6 or, convert 6 road pulses inputs output of to 6 tunnel dipulses.Behind the formation of D15 dipulse and V18, V19, V33, V34, V45, the V46 power amplifier, from corresponding terminal output.Triggering TP21, TP22, TP23, the TP26 of waveform sampling point waveform such as Fig. 4, is one group of two burst pulse ripple.
The protection value is adjusted:
The RP1 flow valuve of adjusting, adjust in rated current 1.1 times of the present invention.
The PR2 overpressure value of adjusting, adjust in rated voltage 1.1 times of the present invention.
RP3 is when the DL2 short circuit and given maximum, and adjusting is output as 1.2 times of the specified output dc voltage of equipment.
RP4 does not adjust when the DL short circuit.
The RP6 shut off value of adjusting, the present invention adjusts and is load current value.
The RP7 soft-start time of adjusting, the time of integration of adjusting is more long, start more slow steadily.
Circuits for triggering each point waveform as shown in Figure 4.
Claims (5)
1. a direct current silicon commutating power supply is characterized in that, comprises major loop, Relay-controlled Circuit, protective circuit and circuits for triggering; Wherein, described Relay-controlled Circuit, protective circuit and circuits for triggering are connected major loop respectively, and Relay-controlled Circuit connects protective circuit, and protective circuit is connected with circuits for triggering.
2. direct current silicon commutating power supply as claimed in claim 1 is characterized in that, described major loop comprises that three-phase alternating-current supply, contactor, D.C mutual-inductor, thyristor exchange regulator, three-phase transformer and three-phase bridge rectifier circuit; Wherein, described three-phase alternating-current supply connects three D.C mutual-inductors by contactor, the D.C mutual-inductor lower end connects thyristor respectively and exchanges regulator, and thyristor exchanges the described three-phase transformer of the common connection in lower end of regulator, and three-phase transformer connects described three-phase bridge rectifier circuit.
3. direct current silicon commutating power supply as claimed in claim 2 is characterized in that, the power supply of described major loop is three-phase alternating-current supply, and the A phase of three-phase alternating-current supply, B install three-phase air switch S mutually with C mutually
o, three-phase air switch S
oLower end A1, B1 and C1 all with contactor K
0Main contacts link to each other; Contactor K
0Main contacts lower end A2, B2 be connected D.C mutual-inductor T respectively with C2
4, T
5And T
6D.C mutual-inductor T
4Secondary side connecting resistance R4 is in case the D.C mutual-inductor secondary circuit short-circuit; D.C mutual-inductor T
5Secondary side connecting resistance R5, D.C mutual-inductor T
6Secondary side connecting resistance R6; D.C mutual-inductor T
4, T
5And T
6The lower end be respectively A3, B3 and C3, A3, B3 are connected to a thyristor respectively with the C3 lower end and exchange regulator, specifically connect as follows: from A3 three circuit in parallel, article one circuit connects the anode of thyristor V1 from A3, the negative electrode of thyristor V1 meets A4, the X11 of gate pole g1 contact Power Generation Road; The second circuit is resistance-capacitance circuit, and the second circuit connects capacitor C 1 from A3, capacitor C 1 other end connecting resistance R1, and resistance R 1 another termination A4, this resistance-capacitance circuit is used for suppressing the internal cause overvoltage, comprises the commutation overvoltage and turn-offs overvoltage; Article three, circuit connects the negative electrode of thyristor V4 from A3, and the anode of thyristor V4 meets A4, the X41 of gate pole g4 contact Power Generation Road.In like manner, from B3 three circuit in parallel, article one circuit connects the anode of thyristor V3 from B3, and the negative electrode of thyristor V3 meets B4, the X31 of gate pole g3 contact Power Generation Road; The second circuit connects capacitor C 2 from B3, capacitor C 2 other end connecting resistance R2, resistance R 2 another termination B4; Article three, circuit connects the negative electrode of thyristor V6 from B3, and the anode of thyristor V6 meets B4, the X61 of gate pole g6 contact Power Generation Road; From C3 three circuit in parallel, article one circuit connects the anode of thyristor V5 from C3, and the negative electrode of thyristor V5 meets C4, the X51 of gate pole g5 contact Power Generation Road; The second circuit connects capacitor C 3 from C3, capacitor C 3 other end connecting resistance R3, resistance R 3 another termination C4; Article three, circuit connects the negative electrode of thyristor V2 from C3, and the anode of thyristor V2 meets C4, the X21 of gate pole g2 contact Power Generation Road; The gate pole of above-mentioned 6 thyristor V1-V6 is pressed the V1-V6 sequential turn-on, and the adjacent two thyristor conduction phase angle in front and back differ from 60 degree;
Lower end A4, B4, the C4 of three thyristor interchange regulators all are connected with three-phase transformer T1, and three-phase transformer T1 primary side adopts delta connection from beginning to end, and three-phase transformer T1 secondary side A5, B5, C5 also adopt delta connection from beginning to end;
Three-phase transformer T1 output termination three-phase bridge rectifier circuit.This three-phase bridge rectifier circuit has six brachium pontis, from A5 parallel diode V11 and V14, from B5 parallel diode V13 and V16, from C5 parallel diode V15 and V12, wherein the output of diode V11, V13, V15 is total to anode, the output common cathode of diode V14, V16, V12.
100 with 101 o'clock between three branch roads in parallel, wherein, article one branch road meets slide rheostat RP1 from 100, this slide rheostat RP1 is in order to the flow valuve of adjusting, adjust in rated current 1.1 times, the following terminating resistor R7 of rheostat RP1, following termination 101 points of resistance R 7; The second branch road is from 100 connecting resistance R8, following termination 103 points of resistance R 8; Article three, branch road meets voltmeter PV, another termination 101 points of voltmeter PV from 100.
4. direct current silicon commutating power supply as claimed in claim 1 is characterized in that, the structure of described Relay-controlled Circuit is as follows:
From 6 branch roads below the secondary side parallel connection of control transformer T3:
Article one, branch road meets contactor K from 270
0Auxiliary normally-closed contact upper end, contactor K
0Auxiliary normally-closed contact under termination red led HR1, following termination 239 points of red led HR1, this branch road realize shutting down indication;
The second branch road meets contactor K from 270
0Auxiliary normally opened contact upper end, contactor K
0Auxiliary normally opened contact under termination green indicating lamp HG1, following termination 239 points of green indicating lamp HG1, this branch road are realized the operation indication;
Article three, branch road meets making button S from 270
2, realize the startup of control device, making button S
2Carry out parallel connection as required, realize execute-in-place and remote operation various modes.Making button S
2One of lower end guide 113 points into, as making button S
2Power making button S to the operation indication during action
2Another branch road of lower end meet disconnected button S
1, realize stopping of control device, moving disconnected button S
1Connect as required, realize execute-in-place and remote operation various modes.Two moving disconnected button S of series connection in the present embodiment
1, each moving disconnected button S
1Following relay termination K
2The upper end of auxiliary normally-closed contact, relay K
2The following termination time relay κ of auxiliary normally-closed contact
1Coil, time relay κ
1Following termination 239 points of coil; Time relay K
1Auxiliary normally-closed contact insert and 274 points of protective circuit respectively at 273, this branch road is realized power supply on/off switch;
Article four, branch road is from 270 auxiliary normally opened contacts that connect the relay K of protective circuit, the following relay termination K of the auxiliary normally opened contact of relay K
2Coil, relay K
2Following termination 239 points of coil, relay K
2Auxiliary normally opened contact insert and 274 points respectively at 273, this branch road is realized fault actions;
Article five, branch road is from the upper end of 270 water receiving pressure sensor KL, the normally closed point in the lower end of water pressure sensor KL connects 271 points, the lower end normal opened contact of water pressure sensor KL connects the upper end of yellow indicator lamp HY, and following termination 239 points of yellow indicator lamp HY are as the indication of thyristor cooling water hydraulic pressure;
Article six, branch road is succeeded electrical equipment K from 270
2Auxiliary normally opened contact, relay K
2Auxiliary normally opened contact lower end (125 point) meet red led HR2, following termination 239 points of red led HR2, this branch road is realized faulty indication;
Control circuit is from 268 and 269 access making button S of protective circuit
3, this branch road realizes that fault resets;
From major loop A1 point relay K turn-on time
1Time-delay open the instantaneous normally opened contact that closes, time relay K
1Time-delay open 308 of the instantaneous lower ends of closing of often opening, contact and meet contactor K
0Coil, contactor K
0The following termination main circuit B1 point of coil.
5. direct current silicon commutating power supply as claimed in claim 4 is characterized in that, the next primary side that leads to control transformer T3 since B1 and the C1 of major loop of the power supply of described Relay-controlled Circuit; The voltage of three kinds of grades of secondary side output of control transformer T3 is respectively and exchanges 24V, exchanges 6.3V and exchanges 5V.
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| CN103986347A (en) * | 2014-05-12 | 2014-08-13 | 东南大学 | Three-phase bridge-type half-control rectification trigger circuit with protection function |
| CN104968114A (en) * | 2015-07-06 | 2015-10-07 | 湖南工业大学 | Long-distance LED lamp light modulation circuit through controllable rectification |
| CN104184436B (en) * | 2014-07-29 | 2017-02-15 | 中国航天科技集团公司第九研究院第七七一研究所 | Triggerable accurate timing circuit with wide supply voltage range |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN107134348A (en) * | 2017-05-25 | 2017-09-05 | 国网江苏省电力公司南京供电公司 | A kind of distribution transformer voltage-regulating system |
| CN107666291A (en) * | 2017-09-07 | 2018-02-06 | 沈阳铁路信号有限责任公司 | Train TWC system power amplifiers guard method and protection circuit |
| CN107797033A (en) * | 2017-09-29 | 2018-03-13 | 广西电网有限责任公司电力科学研究院 | A kind of detection platform to analogue transformer partial discharge test |
| CN108601183A (en) * | 2018-04-28 | 2018-09-28 | 江西电力职业技术学院 | Beacon monitors system and method |
| CN109639159A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN110943493A (en) * | 2019-10-31 | 2020-03-31 | 厦门龙净环保节能科技有限公司 | Three-phase direct current high voltage power supply intermittent power supply circuit for electric precipitation |
| CN113658815A (en) * | 2021-08-06 | 2021-11-16 | 江苏威腾配电有限公司 | Interlocking control circuit for three-phase same-phase sequence phase change switch |
| CN113763590A (en) * | 2021-08-30 | 2021-12-07 | 惠州拓邦电气技术有限公司 | Electrical equipment working time calculation method and device, storage medium and electrical equipment |
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| CN103986347A (en) * | 2014-05-12 | 2014-08-13 | 东南大学 | Three-phase bridge-type half-control rectification trigger circuit with protection function |
| CN103986347B (en) * | 2014-05-12 | 2016-09-14 | 东南大学 | A kind of three-phase semi-controlled bridge type rectification triggering circuit with defencive function |
| CN104184436B (en) * | 2014-07-29 | 2017-02-15 | 中国航天科技集团公司第九研究院第七七一研究所 | Triggerable accurate timing circuit with wide supply voltage range |
| CN104968114A (en) * | 2015-07-06 | 2015-10-07 | 湖南工业大学 | Long-distance LED lamp light modulation circuit through controllable rectification |
| CN104968114B (en) * | 2015-07-06 | 2017-03-22 | 湖南工业大学 | Long-distance LED lamp light modulation circuit through controllable rectification |
| CN106546830A (en) * | 2016-10-27 | 2017-03-29 | 北京机械设备研究所 | A kind of N phase voltages phase shortage and negative phase sequence detection method |
| CN106546830B (en) * | 2016-10-27 | 2019-09-10 | 北京机械设备研究所 | A kind of N phase voltage phase shortage and negative phase sequence detection method |
| CN107134348A (en) * | 2017-05-25 | 2017-09-05 | 国网江苏省电力公司南京供电公司 | A kind of distribution transformer voltage-regulating system |
| CN107666291A (en) * | 2017-09-07 | 2018-02-06 | 沈阳铁路信号有限责任公司 | Train TWC system power amplifiers guard method and protection circuit |
| CN107666291B (en) * | 2017-09-07 | 2021-08-24 | 沈阳铁路信号有限责任公司 | Train TWC system power amplifier protection method and protection circuit |
| CN107797033A (en) * | 2017-09-29 | 2018-03-13 | 广西电网有限责任公司电力科学研究院 | A kind of detection platform to analogue transformer partial discharge test |
| CN107797033B (en) * | 2017-09-29 | 2024-03-19 | 广西电网有限责任公司电力科学研究院 | Detection platform for simulating partial discharge test of transformer |
| CN108601183A (en) * | 2018-04-28 | 2018-09-28 | 江西电力职业技术学院 | Beacon monitors system and method |
| CN109639159A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN109639159B (en) * | 2018-12-18 | 2024-04-02 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
| CN110943493B (en) * | 2019-10-31 | 2021-11-30 | 厦门龙净环保节能科技有限公司 | Three-phase direct current high voltage power supply intermittent power supply circuit for electric precipitation |
| CN110943493A (en) * | 2019-10-31 | 2020-03-31 | 厦门龙净环保节能科技有限公司 | Three-phase direct current high voltage power supply intermittent power supply circuit for electric precipitation |
| CN113658815A (en) * | 2021-08-06 | 2021-11-16 | 江苏威腾配电有限公司 | Interlocking control circuit for three-phase same-phase sequence phase change switch |
| CN113658815B (en) * | 2021-08-06 | 2023-10-13 | 江苏威腾配电有限公司 | Interlocking control circuit for three-phase-sequence phase-change switch |
| CN113763590A (en) * | 2021-08-30 | 2021-12-07 | 惠州拓邦电气技术有限公司 | Electrical equipment working time calculation method and device, storage medium and electrical equipment |
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