CN1651173A - Digital flip flop of three phase full bridge controllable silicon welding power source main loop - Google Patents
Digital flip flop of three phase full bridge controllable silicon welding power source main loop Download PDFInfo
- Publication number
- CN1651173A CN1651173A CN 200510024181 CN200510024181A CN1651173A CN 1651173 A CN1651173 A CN 1651173A CN 200510024181 CN200510024181 CN 200510024181 CN 200510024181 A CN200510024181 A CN 200510024181A CN 1651173 A CN1651173 A CN 1651173A
- Authority
- CN
- China
- Prior art keywords
- pin
- negative electrode
- controllable silicon
- optocoupler
- voltage
- 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.)
- Granted
Links
Images
Abstract
A digital trigger for the main loop of three-phase full-bridge SCR power supply used for welding is composed of main circuit, trigger driver and synchronizer. Its main loop consists of synchronizer, synchronous transformer, resistors and voltage stabilizing diodes. The output voltage or current can be controlled in closed-loop mode. Its advantages are high real-time control accuracy, and high reliability, symmetricity and stability.
Description
Technical field
The present invention relates to the digital flip flop of a kind of welding power source main loop, particularly a kind of three phase full bridge controllable silicon welding power source main loop, belong to the electric welding machine technical field.
Background technology
The big current feed system that is made up of controllable silicon rectifying bridge has a wide range of applications in industrial production.Adopt controllable silicon to be to use very general a kind of circuit in the source of welding current as the power device in the major loop.Powerful rectifier bridge has higher requirement to thyristor gating circuit: the control accuracy height, and real-time is good, the symmetry height, stability is strong, triggers safe and reliable.At present, thyristor gating circuit mainly adopts discrete component and two kinds of methods for designing of special IC, adopts the circuits for triggering of resolution element design to have polyphase circuit performance dispersiveness greatly, debug difficulties, and the pulse symmetry is poor, shortcomings such as stability and poor reliability; Adopt the circuits for triggering of special-purpose integrated trigger circuit chip design to increase aspect the reliability, but still there is the drawback of analog trigger in it than the employing resolution element.
Find through literature search prior art, " a kind of circuits for triggering of monolithic processor controlled three-phase full-controlled bridge silicon controlled rectifier (SCR) " that Peng Jiayin delivered on " electronic technology " 2002 the 1st phases, this article adopts the 80C196KB single-chip microcomputer to realize the triggering of controllable silicon three-phase full-controlled bridge is controlled in conjunction with peripheral components, this design has improved the antijamming capability of trigger, improve the symmetry of three-phase trigger pulse, can adopt software programming to obtain triggering the adjustable trigger impulse in angle in addition.Though this design is than adopting two kinds of methods for designing of discrete component and special IC to realize the triggering of controllable silicon three-phase full-controlled bridge is controlled, anti-interference at trigger, the symmetry aspect of flexibility and three-phase trigger pulse is greatly improved, but in lock-out pulse formation circuit, still adopt discrete analog device to realize the synchronous of synchronous voltage signal and power supply power frequency component, promptly still have the shortcoming that adopts analog control circuit.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art and defective, a kind of digital flip flop of three phase full bridge controllable silicon welding power source main loop is provided, achieved the digital triggering control of main circuit thyristor power device.The digitial controller that the present invention adopts digital signal processor DSP to form, utilize the high-speed data of DSP to handle and computing capability, can when realizing, finish electric power output voltage or electric current are carried out closed-loop control, realize the indifference adjusting controllable silicon power device triggering control.
The present invention is achieved by the following technical solutions, circuit of the present invention comprises: main circuit, triggering drive circuit, wherein, the formation of main circuit with connected mode is: the former edge joint of major loop transformer becomes star, and secondary is that three-phase thyristor bridge rectification circuit (being connected into triangle) and synchrotrans are formed.Full-controlled bridge rectification circuit controllable silicon S1; S2; the negative electrode of S3 connects together as the forward output of power supply; controllable silicon S4; S5; the filter inductance L that the anode of S6 connects together with major loop links together; resistance R 10 is connected across between filter inductance and the power supply forward output; play the afterflow effect; the other end of filter inductance L is as the other end of power supply output; the anode of controllable silicon S1 and the negative electrode of S4 link together; the anode of controllable silicon S2 and the negative electrode of S5 link together; the anode of controllable silicon S3 and the negative electrode of S6 link together; capacitor C 1 and resistance R 1 link together and shield between the anode that is attempted by controllable silicon S1 and the negative electrode; capacitor C 2 and resistance R 2 link together and shield between the anode that is attempted by controllable silicon S2 and the negative electrode; capacitor C 3 and resistance R 3 link together and shield between the anode that is attempted by controllable silicon S3 and the negative electrode; capacitor C 4 and resistance R 4 link together and shield between the anode that is attempted by controllable silicon S4 and the negative electrode; capacitor C 5 and resistance R 5 link together and shield between the anode that is attempted by controllable silicon S5 and the negative electrode, and capacitor C 6 and resistance R 6 link together and shield between the anode that is attempted by controllable silicon S6 and the negative electrode.
The formation that triggers drive circuit with connected mode is: the negative electrode of main circuit power controllable silicon S1 is connected with C37 with R41, the control utmost point and the R41 of S1, and the negative electrode of C37 and diode D26 links to each other; The negative electrode of S2 is connected with C39 with R43, the control utmost point and the R43 of S2, the negative electrode of C39 and diode D28 links to each other, and the negative electrode of S3 is connected with C41 with R45, the control utmost point and the R45 of S3, the negative electrode of C41 and diode D30 links to each other, and the negative electrode of S4 is connected with C38 with R42, the control utmost point and the R42 of S4, the negative electrode of C38 and diode D27 links to each other, the negative electrode of S5 is connected with C40 with R44, the control utmost point and the R44 of S5, and the negative electrode of C40 and diode D29 links to each other; The negative electrode of S6 is connected with C42 with R46, the control utmost point and the R46 of S6, and the negative electrode of C42 and diode D26 links to each other; Main circuit power controllable silicon S1, S2, S3, S4, S5, the anode of S6 respectively with resistance R 35, R37, R39, R36, R38, R40 connects, the T1PWM of DSP, T2PWM, T3PWM pin respectively with 9 pin of U7,11 pin, 13 pin connect, 8 pin of U7,10 pin, 12 pin respectively with bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, optocoupler U4, and U5,2 pin of U6 are connected with its 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 32, R33, R34 connects, resistance R 32, and R33, R34 all are connected with power supply VCC, optocoupler U4, U5,5 pin of U6 respectively with diode D27, D29, the anode of D31 connects, optocoupler U4, U5,6 pin of U6 respectively with R36, R38, R40 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D26, D28, the anode of D30 connects, optocoupler U4, U5,8 pin of U6 respectively with R35, R37, R39 connects.
The present invention also comprises synchronous circuit, and it constitutes and connected mode is: the common zero point of three-phase synchronizing voltage and synchrotrans is through resistance R 11, R12, R13, R14, R15, R16 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 constitute the loop and are added to interchange input transistors output optocoupler U1, U2 is on the U3, wherein, R11, C34 is connected R12 with the negative electrode of voltage-stabiliser tube D1, C34 is connected with the negative electrode of voltage-stabiliser tube D2, R13, and C35 is connected with the negative electrode of voltage-stabiliser tube D3, R14, C35 is connected R15 with the negative electrode of voltage-stabiliser tube D4, C36 is connected with the negative electrode of voltage-stabiliser tube D5, R16, and C35 is connected with the negative electrode of voltage-stabiliser tube D6, voltage-stabiliser tube D1, D3, the anode of D5 respectively with exchange input transistors output optocoupler U1, U2,1 pin of U3 connects, voltage-stabiliser tube D2, D4, the anode of D6 respectively with exchange input transistors output optocoupler U1, U2,2 pin of U3 connect, optocoupler U1, U2,4 pin of U3 also meet and power supply VCC optocoupler U1, U2,3 pin of U3 respectively with R29,1 pin of U7, R30,3 pin of U7, R31,5 pin of U7 connect together, R29, R30 links together 2 pin of U7 to the other end of R31 and simulation, 4 pin, 6 pin respectively with the CAP1 of DSP, CAP2, the CAP3 pin connects.
When the present invention works, at first, export the three-phase synchronizing voltage by synchrotrans by the three-phase voltage that electrical network obtains, the common zero point of this three-phase synchronizing voltage and synchrotrans is through resistance R 11, R12, R13, R14, R15, R16 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 constitutes the loop and is added to interchange input transistors output optocoupler U1, and U2 is on the U3.When the synchronizing voltage non-zero, U1, U2, the output conducting of U3,3 pin are output as high level, are reversed low level through U7, when the synchronizing voltage zero passage, U1, U2, U3 by, 3 pin are output as low level, obtain synchronizing signal thereby be reversed high level through U7; Then, the task manager CAP1 of dsp controller, CAP2, the CAP3 pin is caught the rising edge of synchronizing signal, thereby produces corresponding interrupt requests, and the interruption that makes an immediate response of DSP kernel forwards in the interrupt routine.
In interrupt routine, DSP composes the value of the pilot angle of next the controlling cycle silicon that calculated (value of silicon controlled pilot angle is that the difference of the curtage value of feedback that obtains of specified rate and the sampling of the welding current that obtained by communication or voltage is obtained through pid algorithm) to give corresponding general purpose timer TxPWM and start this timer and begins numeration in main program, withdraw from this interruption subroutine and turn back to main program after removing corresponding interrupt flag bit.
At the main program run duration, DSP finishes the real-time detection of welding current/voltage, DSP makes pid algorithm according to the set-point of welding current/voltage and the deviate of real-time detected welding current/voltage value of feedback, obtains the silicon controlled pilot angle of next control cycle.The DSP main program is when carrying out aforesaid operations, and general purpose timer Tx finishes the numeration function, and this numeration is to finish on the backstage, does not promptly take the running time of DSP.When numeration time to time of setting, the TxPWM pin output width of DSP is that 70 ° trigger impulse is through bidirectional thyristor optocoupler U4, U5, U6 carries out level to be isolated, bidirectional thyristor U4, U5, its output of U6 are two groups of two-way admittance IGCTs, through diode D26, D27, D28, D29, D30, D31 receive respectively between the main circuit power silicon controlled anode and the control utmost point and play an on-off action.
Above-mentioned obtaining from synchronizing signal, transform, algorithm to digital signal processor phase shift trigger impulse is realized, arrive again and drive link, all be the direct circulation and the processing of digital information, its control accuracy directly by the software decision, has reduced the influence of external factor such as environment temperature, supply voltage, time to system's control characteristic, has guaranteed the uniformity and the stability of control system control characteristic when long-time running.
The present invention has substantive distinguishing features and marked improvement, the digitial controller that adopts digital signal processor DSP to form, have advantages such as hardware circuit is simple, precision of real time control is high, the output trigger impulse is safe and reliable, symmetry is high, the control form is versatile and flexible, the stability of simultaneity factor, reliability is guaranteed.
Description of drawings
Fig. 1 is a main circuit diagram of the present invention
Fig. 2 is synchronous circuit and triggers drive circuit figure
The specific embodiment
As illustrated in fig. 1 and 2, the present invention includes: main circuit, triggering drive circuit also comprise synchronous circuit.
The formation of main circuit with connected mode is: the former edge joint of major loop transformer becomes star, secondary is that three-phase thyristor bridge rectification circuit and synchrotrans are formed, the full-controlled bridge rectification circuit is connected into triangle, its controllable silicon S1, S2, the negative electrode of S3 connects together as the forward output of power supply, controllable silicon S4, S5, the filter inductance L that the anode of S6 connects together with major loop links together, resistance R 10 is connected across between filter inductance and the power supply forward output, and the other end of filter inductance L is as the other end of power supply output, and the anode of controllable silicon S1 and the negative electrode of S4 link together, the anode of controllable silicon S2 and the negative electrode of S5 link together, the anode of controllable silicon S3 and the negative electrode of S6 link together, C1 and R1, C2 and R2, C3 and R3, C4 and R4, C5 and R5, C6 and R6 connect respectively and are attempted by controllable silicon S1, S2, S3, S4, S5 is between the anode and negative electrode of S6; The formation that triggers drive circuit with connected mode is: the negative electrode of main circuit power controllable silicon S1 is connected with C37 with R41, the control utmost point and the R41 of S1, and the negative electrode of C37 and diode D26 links to each other; The negative electrode of S2 is connected with C39 with R43, the control utmost point and the R43 of S2, the negative electrode of C39 and diode D28 links to each other, and the negative electrode of S3 is connected with C41 with R45, the control utmost point and the R45 of S3, the negative electrode of C41 and diode D30 links to each other, and the negative electrode of S4 is connected with C38 with R42, the control utmost point and the R42 of S4, the negative electrode of C38 and diode D27 links to each other, the negative electrode of S5 is connected with C40 with R44, the control utmost point and the R44 of S5, and the negative electrode of C40 and diode D29 links to each other; The negative electrode of S6 is connected with C42 with R46, the control utmost point and the R46 of S6, and the negative electrode of C42 and diode D26 links to each other; Main circuit power controllable silicon S1, S2, S3, S4, S5, the anode of S6 respectively with resistance R 35, R37, R39, R36, R38, R40 connects, the T1PWM of DSP, T2PWM, T3PWM pin respectively with 9 pin of U7,11 pin, 13 pin connect, 8 pin of U7,10 pin, 12 pin and bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, optocoupler U4, and U5,2 pin of U6 are connected with its 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 32, R33, R34 connects, resistance R 32, and R33, R34 all are connected with power supply VCC, optocoupler U4, U5,5 pin of U6 respectively with diode D27, D29, the anode of D31 connects, optocoupler U4, U5,6 pin of U6 respectively with R36, R38, R40 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D26, D28, the anode of D30 connects, optocoupler U4, U5,8 pin of U6 respectively with R35, R37, R39 connects.
Described synchronous circuit, it constitutes and connected mode is: the common zero point of three-phase synchronizing voltage and synchrotrans is through resistance R 11, R12, R13, R14, R15, R16 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 constitute the loop and are added to interchange input transistors output optocoupler U1, U2 is on the U3, wherein, R11, C34 is connected R12 with the negative electrode of voltage-stabiliser tube D1, C34 is connected with the negative electrode of voltage-stabiliser tube D2, R13, and C35 is connected with the negative electrode of voltage-stabiliser tube D3, R14, C35 is connected R15 with the negative electrode of voltage-stabiliser tube D4, C36 is connected with the negative electrode of voltage-stabiliser tube D5, R16, and C35 is connected with the negative electrode of voltage-stabiliser tube D6, voltage-stabiliser tube D1, D3, the anode of D5 respectively with exchange input transistors output optocoupler U1, U2,1 pin of U3 connects, voltage-stabiliser tube D2, D4, the anode of D6 respectively with exchange input transistors output optocoupler U1, U2,2 pin of U3 connect, optocoupler U1, U2,4 pin of U3 also meet and power supply VCC optocoupler U1, U2,3 pin of U3 respectively with R29,1 pin of U7, R30,3 pin of U7, R31,5 pin of U7 connect together, R29, R30 links together 2 pin of U7 to the other end of R31 and simulation, 4 pin, 6 pin respectively with the CAP1 of DSP, CAP2, the CAP3 pin connects.
Realize that with system's closed-loop control process it is example that the numeral of power supply constant-current characteristics output triggers.The present invention adopts digital signal processor DSP to realize that as the control system core numeral of controllable silicon welding power source main loop power controlled silicon triggers.
At first, export the three-phase synchronizing voltage by the three-phase voltage that electrical network obtains by synchrotrans, the common zero point of this three-phase synchronizing voltage and synchrotrans is through resistance R 11, R12, R13, R14, R15, R16 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 constitute the loop and are added to interchange input transistors output optocoupler U1, U2 is on the U3.When the synchronizing voltage non-zero, U1, U2, the output conducting of U3,3 pin are output as high level, are reversed low level through U7, when the synchronizing voltage zero passage, U1, U2, U3 by, 3 pin are output as low level, obtain synchronizing signal thereby be reversed high level through U7; Then, the task manager CAP1 of dsp controller, CAP2, the CAP3 pin is caught the rising edge of synchronizing signal, thereby produces corresponding interrupt requests, and the interruption that makes an immediate response of DSP kernel forwards in the interrupt routine.
In interrupt routine, DSP judges at first this interruption is by which road CAP signal to be produced, if DSP judges that this time interrupting is to catch rising edge by CAP1 to produce, then forwarding CAP1 to interrupts handling in the subprogram, finish following function in this subprogram: give general purpose timer T1 the value assignment of next the control cycle silicon controlled pilot angle that in main program, calculates, start the T1 timer simultaneously and begin numeration, after removing corresponding interrupt flag bit, withdraw from this interruption subroutine and turn back to main program.
At the main program run duration, DSP finishes the real-time detection of welding current, and DSP makes pid algorithm according to the set-point of welding current and the deviate of real-time detected welding current value of feedback, obtains the silicon controlled pilot angle of next control cycle.The DSP main program is when carrying out aforesaid operations, and general purpose timer T1 finishes the numeration function, and this numeration is to finish on the backstage, does not promptly take the running time of DSP.When numeration time to time of setting, the T1PWM pin output width of DSP is that 70 ° trigger impulse carries out the level isolation through bidirectional thyristor optocoupler U4, its output of bidirectional thyristor U4 is two groups of two-way admittance IGCTs, through diode D26, D27 receives respectively between the main circuit power silicon controlled anode and the control utmost point, and then realizes that controllable silicon S1 or leading of S4 escape.Interrupt routine is if produced by CAP2, then aforesaid operations is identical, the T2PWM trigger impulse of DSP output carries out level every height through bidirectional thyristor optocoupler U5, its output of bidirectional thyristor U5 is two groups of two-way admittance IGCTs, through diode D28, D29 receives respectively between the main circuit power silicon controlled anode and the control utmost point, and then realizes the conducting of controllable silicon S2 or S5.Interrupt routine is if produced by CAP3, then aforesaid operations is identical, the T3PWM trigger impulse of DSP output carries out level through bidirectional thyristor optocoupler U6 isolates, its output of bidirectional thyristor U6 is two groups of two-way admittance IGCTs, through diode D30, D31 receives respectively between the main circuit power silicon controlled anode and the control utmost point, and then realizes the conducting of controllable silicon S3 or S6.
In welding process, the every 3.3ms of DSP produces a capture interrupt, and promptly every 3.3ms repeats to begin aforementioned process, and then finishes the numeral triggering control to the controllable silicon power device, promptly finishes the constant current control to source of welding current output.
Claims (3)
1. the digital flip flop of a three phase full bridge controllable silicon welding power source main loop comprises: main circuit, triggering drive circuit, it is characterized in that, also comprise synchronous circuit, it constitutes and connected mode is: the common zero point of three-phase synchronizing voltage and synchrotrans is through resistance R 11, R12, R13, R14, R15, R16 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 constitutes the loop and is added to interchange input transistors output optocoupler U1, and U2 is on the U3, wherein, R11, C34 is connected with the negative electrode of voltage-stabiliser tube D1, R12, C34 is connected R13 with the negative electrode of voltage-stabiliser tube D2, C35 is connected with the negative electrode of voltage-stabiliser tube D3, R14, and C35 is connected with the negative electrode of voltage-stabiliser tube D4, R15, C36 is connected R16 with the negative electrode of voltage-stabiliser tube D5, C35 is connected with the negative electrode of voltage-stabiliser tube D6, voltage-stabiliser tube D1, D3, the anode of D5 is exported optocoupler U1 with exchanging input transistors respectively, U2, and 1 pin of U3 connects, voltage-stabiliser tube D2, D4, the anode of D6 respectively with exchange input transistors output optocoupler U1, U2,2 pin of U3 connect, optocoupler U1, U2,4 pin of U3 also connect and power supply VCC, optocoupler U1, U2,3 pin of U3 respectively with R29,1 pin of U7, R30,3 pin of U7, R31,5 pin of U7 connect together, R29, R30 links together 2 pin of U7 to the other end of R31 and simulation, 4 pin, 6 pin respectively with the CAP1 of DSP, CAP2, the CAP3 pin connects.
2. the digital flip flop of three phase full bridge controllable silicon welding power source main loop according to claim 1, it is characterized in that, the formation of described main circuit with connected mode is: the former edge joint of major loop transformer becomes star, secondary is that three-phase thyristor bridge rectification circuit and synchrotrans are formed, the full-controlled bridge rectification circuit is connected into triangle, its controllable silicon S1, S2, the negative electrode of S3 connects together as the forward output of power supply, controllable silicon S4, S5, the filter inductance L that the anode of S6 connects together with major loop links together, resistance R 10 is connected across between filter inductance and the power supply forward output, the other end of filter inductance L is as the other end of the output of power supply, the anode of controllable silicon S1 and the negative electrode of S4 link together, the anode of controllable silicon S2 and the negative electrode of S5 link together, the anode of controllable silicon S3 and the negative electrode of S6 link together, C1 and R1, C2 and R2, C3 and R3, C4 and R4, C5 and R5, C6 and R6 connect respectively and are attempted by controllable silicon S1, S2, S3, S4, S5 is between the anode and negative electrode of S6.
3. the digital flip flop of three phase full bridge controllable silicon welding power source main loop according to claim 1, it is characterized in that, the formation of described triggering drive circuit with connected mode is: the negative electrode of main circuit power controllable silicon S1 is connected with C37 with R41, the control utmost point and the R41 of S1, the negative electrode of C37 and diode D26 links to each other; The negative electrode of S2 is connected with C39 with R43, the control utmost point and the R43 of S2, the negative electrode of C39 and diode D28 links to each other, and the negative electrode of S3 is connected with C41 with R45, the control utmost point and the R45 of S3, the negative electrode of C41 and diode D30 links to each other, and the negative electrode of S4 is connected with C38 with R42, the control utmost point and the R42 of S4, the negative electrode of C38 and diode D27 links to each other, the negative electrode of S5 is connected with C40 with R44, the control utmost point and the R44 of S5, and the negative electrode of C40 and diode D29 links to each other; The negative electrode of S6 is connected with C42 with R46, the control utmost point and the R46 of S6, and the negative electrode of C42 and diode D26 links to each other; Main circuit power controllable silicon S1, S2, S3, S4, S5, the anode of S6 respectively with resistance R 35, R37, R39, R36, R38, R40 connects, the T1PWM of DSP, T2PWM, T3PWM pin respectively with 9 pin of U7,11 pin, 13 pin connect, 8 pin of U7,10 pin, 12 pin and bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, optocoupler U4, and U5,2 pin of U6 are connected with its 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 32, R33, R34 connects, resistance R 32, and R33, R34 all are connected with power supply VCC, optocoupler U4, U5,5 pin of U6 respectively with diode D27, D29, the anode of D31 connects, optocoupler U4, U5,6 pin of U6 respectively with R36, R38, R40 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D26, D28, the anode of D30 connects, optocoupler U4, U5,8 pin of U6 respectively with R35, R37, R39 connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100241812A CN1325217C (en) | 2005-03-03 | 2005-03-03 | Digital flip flop of three phase full bridge controllable silicon welding power source main loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100241812A CN1325217C (en) | 2005-03-03 | 2005-03-03 | Digital flip flop of three phase full bridge controllable silicon welding power source main loop |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651173A true CN1651173A (en) | 2005-08-10 |
| CN1325217C CN1325217C (en) | 2007-07-11 |
Family
ID=34875995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100241812A Expired - Fee Related CN1325217C (en) | 2005-03-03 | 2005-03-03 | Digital flip flop of three phase full bridge controllable silicon welding power source main loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1325217C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101637848B (en) * | 2009-08-17 | 2011-06-15 | 无锡威华电焊机制造有限公司 | Welding power source of steel-grating press welder by using inverting technique |
| CN102545660A (en) * | 2012-01-18 | 2012-07-04 | 洛阳升华感应加热有限公司 | Phase sequence self-adaption trigger circuit of three-phase fully-controlled rectifier induction heating power supply |
| CN108599601A (en) * | 2018-07-02 | 2018-09-28 | 哈尔滨理工大学 | Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit and its method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3883714A (en) * | 1973-07-16 | 1975-05-13 | Jasper Lewis James | D. C. power supply for arc welding with SCR controlling three-phase power |
| US4071885A (en) * | 1975-12-05 | 1978-01-31 | The Lincoln Electric Company | Electric arc welding power supply |
| US4561059A (en) * | 1983-02-24 | 1985-12-24 | Beckworth Davis International, Inc. | Microprocessor controlled welding apparatus |
| CN2362639Y (en) * | 1998-12-16 | 2000-02-09 | 蒋仲湘 | Novel trigger control circuit for silicon controlled dc welding machine |
-
2005
- 2005-03-03 CN CNB2005100241812A patent/CN1325217C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101637848B (en) * | 2009-08-17 | 2011-06-15 | 无锡威华电焊机制造有限公司 | Welding power source of steel-grating press welder by using inverting technique |
| CN102545660A (en) * | 2012-01-18 | 2012-07-04 | 洛阳升华感应加热有限公司 | Phase sequence self-adaption trigger circuit of three-phase fully-controlled rectifier induction heating power supply |
| CN102545660B (en) * | 2012-01-18 | 2014-04-09 | 洛阳升华感应加热股份有限公司 | Phase sequence self-adaption trigger circuit of three-phase fully-controlled rectifier induction heating power supply |
| CN108599601A (en) * | 2018-07-02 | 2018-09-28 | 哈尔滨理工大学 | Synchrotrans realize isolated passive self-powered optocoupler three-phase synchronous rectification circuit and its method |
| CN108599601B (en) * | 2018-07-02 | 2023-11-14 | 哈尔滨理工大学 | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1325217C (en) | 2007-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9899909B2 (en) | Control device and method of totem-pole bridgeless PFC soft switch | |
| CN1651173A (en) | Digital flip flop of three phase full bridge controllable silicon welding power source main loop | |
| CN101615842A (en) | Electric and electronic power unit module | |
| CN104682394B (en) | Electric-dazzling prevention device and method of bidirectional zero-clearance conversion current based on self-adaption | |
| CN106353573A (en) | Overcurrent fault monitoring protection device and method for flexible direct-current transmission inverter station | |
| CN105762767A (en) | Hardware protection circuit based on APFC | |
| CN107888059A (en) | A kind of surge restraint circuit and Surge suppression method | |
| WO2021135097A1 (en) | Four-quadrant frequency converter energy feedback control circuit | |
| CN1186162C (en) | Digital driving circuit for main circuit of silicon controlled welding machine | |
| CN201663543U (en) | Zero-crossing triggering module of thyristor switching capacitor | |
| CN1604447A (en) | Digital trigger circuit of twelve-phase silicon controlled welding power source | |
| CN102195456B (en) | High-power series 12-pulse thyristor rectifier triggering device and method for ship | |
| CN203326614U (en) | Low-power-consumption fast-type capacitor switch with intelligent control | |
| CN205092786U (en) | Three phase three wire system PWM rectifier | |
| CN203151102U (en) | TMS320F2812-based controller of power distribution synchronous compensator | |
| CN205051613U (en) | Step motor control circuit | |
| CN2810090Y (en) | An electromagnetic oven controller with novel protection circuit | |
| CN205644142U (en) | Controlling means is selected to accurate angle of electronic type intelligence | |
| CN208833850U (en) | A kind of multilevel photovoltaic grid-connected converter On-line Fault identifying system | |
| CN104836423A (en) | Three-phase bridge rectifier circuit silicon controlled rectifier triggering method and three-phase bridge rectifier circuit silicon controlled rectifier triggering device | |
| CN201878030U (en) | Three-phase fully controlled bridge rectifying device controlled by single chip microcomputer | |
| CN201860308U (en) | Time-base integrated circuit | |
| CN204794661U (en) | Thyristor trigger based on computer | |
| CN100555490C (en) | Be used in the input/cut off method and the device of the power switch of alternating current circuit | |
| CN209751950U (en) | output power regulating circuit and frequency spectrum therapeutic instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070711 Termination date: 20100303 |