CN1092217A - Three-phase full-controlled trigger bridge circuit for thyristors - Google Patents
Three-phase full-controlled trigger bridge circuit for thyristors Download PDFInfo
- Publication number
- CN1092217A CN1092217A CN 93112106 CN93112106A CN1092217A CN 1092217 A CN1092217 A CN 1092217A CN 93112106 CN93112106 CN 93112106 CN 93112106 A CN93112106 A CN 93112106A CN 1092217 A CN1092217 A CN 1092217A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- resistance
- phase
- trigger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The present invention is a kind of controllable silicon three-phase fully-controlled trigger bridge circuit.Be to obtain synchronizing signal from electrical network with three resistance and voltage-stabiliser tube.Constitute delay circuit by six Schmidt trigger circuits and resistance, electric capacity, carry out phase shifting control.Provide six tunnel series burst pulses with a pulse transformer; After light idol element electricity is isolated, by switch respectively phase difference output be six groups of trigger impulses of 60 °.These circuits for triggering are simple in structure, and are cheap, and debugging is convenient, and working stability is applicable to the controllable silicon induction heater, the power adjustments of large power supplies such as DC speed regulator, and can when the load short circuits fault takes place in the circuit operation, realize straight-through protection.
Description
The invention belongs to a kind of control system of large power supply rectification circuit, can be used for regulating continuously the power output of power supply, can realize straight-through protection.
At present, controllable silicon three-phase fully-controlled trigger bridge circuit system adopts the synchronizing signal transformer, obtains synchronous voltage signal from electrical network.The discrete circuits for triggering all are provided with six groups of identical trigger elements that are made of sawtooth signal generator, phase-shift control circuit and shaping power amplifier; Integrated circuit then concentrates on six groups of essentially identical trigger elements of structure except that the power amplifier level on one or two plug-in unit.In order to guarantee the operate as normal of circuits for triggering, phase shift comparison signal and error protection signal are provided, also need to set up five D.C. regulated power supplies.Because each controllable silicon current potential difference of rectifier bridge and trigger impulse phase difference respectively are 60 ° successively, must realize the electricity isolation of controllable silicon gate level circuit and power amplifier level with six pulse transformers.The circuits for triggering complex structure, components and parts are many, and Installation and Debugging are time-consuming, maintenance difficult.
Task of the present invention is a kind of circuit novelty of invention, and is simple in structure, few with components and parts, cheap, easily debugging, good maintenance, the controllable silicon three-phase fully-controlled trigger bridge circuit system of stable performance.
Fig. 1 is a principle schematic of the present invention;
Fig. 2 is the electric circuit diagram of circuits for triggering of the present invention.
Describe structure in detail below in conjunction with accompanying drawing.
As shown in Figure 1, [A] is the clock that astable circuit constitutes, and can produce the burst pulse of the series about 3000HZ, links with the elementary of pulse transformer MB in the circuits for triggering [B].[B] is controllable silicon three-phase fully-controlled trigger bridge circuit system.Can be 60 ° interval by phase difference with serial burst pulse, be assigned to the rectifier bridge controllable silicon SCR successively
1, SCR
2, SCR
3, SCR
4, SCR
5, SCR
6The gate pole circuit.Full-wave rectification bridge, regulator block AN7815 and filter capacitor C
7, C
8The 15V constant voltage dc source of forming.Potentiometer R
10Regulate 10 current potential, change delay time, regulate the power output of power supply.
The circuits for triggering of fully controlled bridge as shown in Figure 2, [I], [II], [III], [IV], [V], [VI] are Schmidt trigger among the figure.
Basic design of the present invention is with three resistance R
1, R
2, R
3And voltage-stabiliser tube DW
1, DW
2, DW
3Press Y shape and connect, constitute the synchronous voltage signal circuit, obtain synchronizing signal from electrical network; Adopt 6 Schmidt triggers [I], [II], [III], [IV], [V], [VI] respectively with 6 capacitor C
1, C
2, C
3, C
4, C
5, C
6With 6 resistance R
4, R
5, R
6, R
7, R
8, R
9Constitute delay circuit and potentiometer R
10Constitute phase-shift control circuit; With a pulse transformer MB and 6 light idol element GD
1, GD
2, GD
3, GD
4, GD
5, GD
6And switch transistor T
1, T
2, T
3, T
4, T
5, T
6Constitute the trigger impulse circuit.
Three resistance R in the voltage synchronous signal circuit
1, R
2, R
3Respectively with voltage-stabiliser tube DW
1, DW
2, DW
3Series connection; Wherein resistance one terminates at electrical network a.b.c point, and voltage-stabiliser tube one end is that Y shape connects mid point, is connected on 9 of the ground wires, obtains 120 ° of three phase differences and the voltage stabilizing synchronizing signal synchronous with line voltage from the tie-point of resistance and voltage-stabiliser tube.
When operation is implemented in this invention, resistance R
6, and capacitor C
1Constitute delay circuit, C
1Voltage rise exponentially, when reaching a certain value (2～10 volts), Schmidt circuit [I] upset, the output electronegative potential makes light idol element GD
1With triode T
1The switching circuit that constitutes is open-minded.R is passed through in the pulse of pulse transformer MB secondary coil
17; Trigger controllable silicon SCR
1Gate pole.In like manner, lag behind successively with 1/3 all period interval the flip-flop transition of Schmidt circuit [III], [V], makes controllable silicon SCR
3, SCR
5ON time also lag behind successively with all period interval of 1/3.The turnover voltage of Schmidt trigger [I], [III], [V] is by potentiometer R
10Control, regulate R
10Change 10 voltage, realize that phase shift reaches the purpose of regulating output power of power supply the flip-flop transition that can change [I], [III], [V].
Resistance R
5With capacitor C
2Constitute delay circuit, when Schmidt circuit [I] upset output electronegative potential, capacitor C
2Pass through resistance R
5Begin discharge, C
2On voltage descend exponentially; When voltage is lower than certain value (5 volts), Schmidt circuit [II] upset, the output high potential makes light idol element GD
2With triode T
2The switching circuit that constitutes is open-minded.R is passed through in the pulse of pulse transformer MB secondary coil
16, trigger controllable silicon SCR
6Gate pole.Schmidt circuit [II] respectively lagged behind for 1/6 cycle than Schmidt's [I] flip-flop transition flip-flop transition.In like manner, the flip-flop transition of Schmidt circuit [IV], [VI] is flip-flop transition of Schmidt circuit [III], [V] respectively than respectively lagging behind 1/6 cycle.Like this, provide six tunnel series burst pulses, through light idol element GD with a pulse transformer MB
1～GD
6Electricity is isolated by switch transistor T
1～T
6Phase difference output is 60 ° a trigger impulse, triggers six controllable silicon SCR on the rectifier bridge respectively
1～SCR
6
When short trouble appears in load R, there is not steady oscillation source [A] failure of oscillations, the pulse of transformer MB primary coil is disappeared, block rectifier bridge silicon controlled trigger impulse simultaneously, thereby realized straight-through protection.
The present invention has saved synchrotrans and six sawtooth signal generators of complex circuit than general fully controlled bridge circuits for triggering system; six pulse transformers and four D.C. regulated power supplies that phase shift comparison signal and error protection signal are provided have also been saved; simplified line construction greatly; whole circuits for triggering are concentrated on the less plug-in unit; reduce processing cost, improved the performance of circuit.
The present invention is applicable to controllable silicon induction heater, the power adjustments of large power supplies such as DC speed regulator.0 °～150 ° of gate pulse phase shift ranges, output voltage average value is adjustable continuously between 500V～0V, satisfies power and regulates requirement.
Claims (2)
1, a kind of novel thyristor three-phase fully-controlled circuits for triggering system is to be made of synchronous voltage signal circuit, phase-shift control circuit, trigger impulse circuit, it is characterized in that with three resistance R
1, R
2, R
3And voltage-stabiliser tube DW
1, DW
2, DW
3Press Y shape and connect, constitute the synchronous voltage signal circuit, obtain synchronizing signal from electrical network, adopt 6 Schmidt triggers [I], [II], [III], [IV], [V], [VI] respectively with 6 capacitor C
1, C
2, C
3, C
4, C
5, C
6, and 6 resistance R
4, R
5, R
6, R
7, R
8, R
9Constitute delay circuit and potentiometer R
10Constitute phase-shift control circuit, with a pulse transformer MB and 6 light idol element GD
1, GD
2, GD
3, GD
4, GD
5, GD
6And 6 switch transistor T
1, T
2, T
3, T
4, T
5, T
6Constitute the trigger impulse circuit.
2,, it is characterized in that three resistance R in the described voltage synchronous signal circuit according to the described three-phase full-controlled trigger bridge circuit for thyristors of claim 1
1, R
2, R
3Respectively with voltage-stabiliser tube DW
1, DW
2, DW
3Series connection, wherein resistance one terminates at electrical network a.b.c point, and voltage-stabiliser tube one end is the mid point that Y shape connects, and is connected on 9 of the ground wires, obtains 120 ° of three phase differences and the voltage stabilizing synchronizing signal synchronous with line voltage from resistance with the node that connects of voltage-stabiliser tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112106 CN1092217A (en) | 1993-03-08 | 1993-08-14 | Three-phase full-controlled trigger bridge circuit for thyristors |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93230357 | 1993-03-08 | ||
| CN93230357.9 | 1993-03-08 | ||
| CN 93112106 CN1092217A (en) | 1993-03-08 | 1993-08-14 | Three-phase full-controlled trigger bridge circuit for thyristors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1092217A true CN1092217A (en) | 1994-09-14 |
Family
ID=25743093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112106 Pending CN1092217A (en) | 1993-03-08 | 1993-08-14 | Three-phase full-controlled trigger bridge circuit for thyristors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1092217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890404A (en) * | 2021-11-03 | 2022-01-04 | 河南熔克电气制造有限公司 | Phase shift angle adjustable three-phase intermediate frequency power supply circuit |
-
1993
- 1993-08-14 CN CN 93112106 patent/CN1092217A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890404A (en) * | 2021-11-03 | 2022-01-04 | 河南熔克电气制造有限公司 | Phase shift angle adjustable three-phase intermediate frequency power supply circuit |
| CN113890404B (en) * | 2021-11-03 | 2024-04-12 | 河南熔克电气制造有限公司 | Three-phase intermediate frequency power supply circuit with adjustable phase shift angle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108566101B (en) | Modular power supply system | |
| CN101997324B (en) | There is the system and method for the bidirectional energy conveying of electric isolution | |
| Shimizu et al. | A flyback-type single phase utility interactive inverter with low-frequency ripple current reduction on the DC input for an AC photovoltaic module system | |
| CN101895211B (en) | Extensible switching power supply circuit | |
| CN102439836B (en) | Electrical system for starting up aircraft engines | |
| CN107251398A (en) | DC DC converters | |
| CN1006349B (en) | Circuit arrangement for producing a.c. voltage | |
| CN106208714A (en) | Synchronous rectifying switching power source and control method | |
| CN105375757B (en) | A kind of DC voltage conversion device and its bridge arm control method | |
| CN107124115A (en) | A kind of method that solid-state transformer starts | |
| CN208424215U (en) | High voltage flyback converter | |
| Jung et al. | A multiple-input SEPIC with a bi-directional input for modular distributed generation and energy storage integration | |
| CN206611346U (en) | A kind of distributed high-power high-voltage power supply | |
| CN217115924U (en) | Single-phase three-wire inverter circuit and single-phase three-wire inverter | |
| CN1092217A (en) | Three-phase full-controlled trigger bridge circuit for thyristors | |
| US20200059162A1 (en) | Capacitive-Based Power Transformation | |
| CN107733241A (en) | Double primary side insulating power supplies | |
| CN108599593A (en) | One kind is from the high boost rectifier of current-sharing module large capacity | |
| CN108777544A (en) | DC/DC converters and its control method for flexible DC power transmission | |
| CN209198534U (en) | A kind of zero cross detection circuit and device | |
| CN109038524A (en) | A kind of electric current two-way low-voltage direct distribution system active control type limiting protector and its working method | |
| US4159428A (en) | Method of dividing direct current among parallel circuits and device for effecting same | |
| CN104993787A (en) | Photovoltaic optimizer for arbitrary waveform output | |
| WO2022041586A1 (en) | Power factor correction circuit, and control apparatus and control method therefor | |
| CN216981805U (en) | Valley filling circuit and AC/DC switching power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |