CN1385273A - Digital driving circuit for main circuit of silicon controlled welding machine - Google Patents
Digital driving circuit for main circuit of silicon controlled welding machine Download PDFInfo
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- CN1385273A CN1385273A CN 02112265 CN02112265A CN1385273A CN 1385273 A CN1385273 A CN 1385273A CN 02112265 CN02112265 CN 02112265 CN 02112265 A CN02112265 A CN 02112265A CN 1385273 A CN1385273 A CN 1385273A
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Abstract
The present invention adopts digital signal processor DSP as main control kernel, the input voltage of two windings of secondary of main transformer which are opposite in phase and positioned on same iron core is passed through resistor and voltage regulator tube and added on the output optical coupler of A.C. input transistor to obtain synchronous signal; DSP event supervisor can trap rising edge of synchronous signal to produce interrupt request, DSP kernel can be transferred into interupt service program to detect the analog quantity on control panel of silicon controlled welding machine, the analog quantity can be changed into digital quantity by means of conversion module in DSP, said digital quantity is undergone the process of initialization by means of three universal timers in DSP.
Description
Technical field: what the present invention relates to is a kind of welding machine major loop, and particularly a kind of digital drive circuit of silicon controlled welding machine major loop belongs to welding technology field.
Background technology: adopting power controlled silicon in the electric welding machine is a kind of circuit that the most generally uses as the controlled power device in the welding major loop.Usually, the transformer secondary winding is formed the three-phase bridge controlled rectification or is formed six phase half-wave zone paralleing reactor modes by power controlled silicon.The triggering and conducting of power controlled silicon often adopts simulation electronic component or integrated controllable silicon phase shift trigger.Find by literature search; people such as horse rosy clouds are at " electric welding machine "; write articles " the integrated simultaneous phase-shifting circuits for triggering development of thyristor type Arc Welding Power " on 2000 (7); the integrated controllable silicon phase shift trigger of this article introduction is that collection detects synchronously; phase-shift pulse forms and protection is one; required peripheral components is less; but; this integrated circuit is by synchronous detected register; reference voltage distributes, and sawtooth waveforms forms circuit, and phase-shifting voltages and sawtooth waveforms comprehensively relatively reach pulse shaping and distribution etc. and partly form; pulse phase shift size and width are by the size decision of external resistance and electric capacity; therefore, this integrated circuit still belongs to analog circuit, and the analog circuit existence is subject to environment temperature; the influence of parameter inconsistency, the poor stability of the angle of flow.
Summary of the invention: the present invention is directed to the deficiencies in the prior art and defective, a kind of digital drive circuit of silicon controlled welding machine major loop is provided, it is directly driven by data signal effectively, improve silicon controlled angle of flow stability and control accuracy.The present invention adopts a kind of peripheral hardware of enriching that has, and the digital signal processor DSP of high-speed computation and processing is realized silicon controlled welding machine main circuit power silicon controlled digital drive as the master control core.
At first, from the input voltage process resistance R 1 of opposite two windings of phase place on the secondary same iron core of main transformer, R2, R3, R4, R5, R6 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 are added to and exchange input transistors output optocoupler U1, and U2 is on the U3.When the input voltage non-zero, U1, U2, the output conducting of U3,3 pin are output as high level, when the input voltage zero passage, U1, U2, U3 by, obtain synchronizing signal thereby 3 pin are output as low level; Then, the task manager CAP1 of dsp controller, CAP2, the CAP3 pin is caught the rising edge of synchronizing signal, thereby produces interrupt requests, and the interruption that makes an immediate response of DSP kernel forwards in the interrupt service routine.Detect the analog quantity of decision phase shift size potentiometer on the silicon controlled welding machine control panel, this analog quantity becomes digital quantity by the built-in A/D modular converter of DSP, again this digital quantity is passed through initialization to built-in three general purpose timers of DSP, the phase shift value is sent into timer, thereby built-in three general purpose timers of DSP produce impulse waveform T1PWM, T2PWM, the T3PWM of three tunnel phase shift adjustable size; At last, T1PWM, the T2PWM of DSP output, T3PWM trigger waveform are carried out level through bidirectional thyristor optocoupler U4, U5, U6 and are isolated, bidirectional thyristor optocoupler U4, its output of U5, U6 are 2 groups of two-way admittance IGCTs, receive respectively between the main circuit power silicon controlled anode and the control utmost point through diode D7, D8, D9, D10, D11, D12 and play an on-off action.
The formation of major loop of the present invention and connected mode are: main circuit power controllable silicon S1, S2, S3, S4, S5, the negative electrode of S6 respectively with resistance R 2, R4, R6, R5, R3, R1 connects, R1, C3 is connected with the negative electrode of voltage-stabiliser tube D1, R2, and C3 is connected R3 with the negative electrode of voltage-stabiliser tube D2, C4 is connected with the negative electrode of voltage-stabiliser tube D3, R4, and C4 is connected R5 with the negative electrode of voltage-stabiliser tube D4, C5 is connected with the negative electrode of voltage-stabiliser tube D5, R6, and C5 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 are connected to the power positive end VCC of control circuit, optocoupler U1, U2,3 pin of U3 respectively with the CAP1 of digital signal processor DSP, CAP2, the CAP3 pin connects.
The T1PWM of DSP, T2PWM, T3PWM pin respectively with bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, and 2 pin of optocoupler U4 are connected with 3 pin, 2 pin of optocoupler U5 are connected with 3 pin, and 2 pin of optocoupler U6 are connected with 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 14, R15, R16 connects, resistance R 14, R15, R16 also connects with power supply VCC and is connected optocoupler U4, U5,5 pin of U6 respectively with diode D8, D10, the anode of D12 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D7, D9, the anode of D11 connects, optocoupler U4, U5,6 pin of U6 and connecing with resistance R 24 are connected.Optocoupler U4, U5,8 pin of U6 and connecing with resistance R 23 are connected.The negative electrode of diode D7 and R17, C9, the control utmost point of controllable silicon S1 connects, the negative electrode of diode D8 and R18, C10, the control utmost point of controllable silicon S6 connects, the negative electrode of diode D9 and R19, C11, the control utmost point of controllable silicon S2 connects, the negative electrode of diode D10 and R20, C12, the control utmost point of controllable silicon S5 connects, the negative electrode of diode D11 and R21, C13, the control utmost point of controllable silicon S3 connects, the negative electrode of diode D12 and R22, C14, the control utmost point of controllable silicon S4 connects, R17, C9 is connected R18 with the negative electrode of controllable silicon S1, C10 is connected with the negative electrode of controllable silicon S6, R19, and C11 is connected with the negative electrode of controllable silicon S2, R20, C12 is connected with the negative electrode of controllable silicon S5, R21, and C13 is connected with the negative electrode of controllable silicon S3, R22, C14 is connected with the negative electrode of controllable silicon S4, controllable silicon S1, S2, the anode of S3 and connecing with R23 is connected, controllable silicon S4, S5, the anode of S6 and connecing with R24 is connected.
Above-mentionedly obtain, transform, to the conversion of digital signal processor embedded software from synchronizing signal, arriving and drive link, all is the direct circulation and the processing of digital information, and its control accuracy is directly determined by software, the influence that not changed by external environment condition realizes that veritably data signal drives.
The present invention has substantive distinguishing features and marked improvement, has improved the stability and the control accuracy of the angle of flow of power controlled silicon, has cancelled analog circuit, and circuit is simple, the stability of system, and reliability and control accuracy have all obtained reliable assurance.
Description of drawings: Fig. 1 major loop schematic diagram of the present invention
The specific embodiment: as shown in Figure 1, the present invention adopts a kind of peripheral hardware of enriching that has, and the digital signal processor DSP of high-speed computation and processing is realized silicon controlled welding machine main circuit power silicon controlled digital drive as the master control core.
At first, from the input voltage process resistance R 1 of opposite two windings of phase place on the secondary same iron core of main transformer, R2, R3, R4, R5, R6 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 are added to and exchange input transistors output optocoupler U1, U2, on the U3, when the input voltage non-zero, U1, U2, the output conducting of U3,3 pin are output as high level, when the input voltage zero passage, U1, U2, U3 by, obtain synchronizing signal thereby 3 pin are output as low level; Then, the task manager CAP1 of dsp controller, CAP2, the CAP3 pin is caught the rising edge of synchronizing signal, produce interrupt requests, the interruption that makes an immediate response of DSP kernel, forward in the interrupt service routine, detect the analog quantity of decision phase shift size potentiometer on the silicon controlled welding machine control panel, this analog quantity becomes digital quantity by the built-in A/D modular converter of DSP, this digital quantity is passed through the initialization to built-in three general purpose timers of DSP again, the phase shift value is sent into timer, built-in three general purpose timers of DSP produce the impulse waveform T1PWM of three tunnel phase shift adjustable size, T2PWM, T3PWM; At last, T1PWM, the T2PWM of DSP output, T3PWM trigger waveform are carried out level through bidirectional thyristor optocoupler U4, U5, U6 and are isolated, bidirectional thyristor optocoupler U4, its output of U5, U6 are 2 groups of two-way admittance IGCTs, receive respectively between the main circuit power silicon controlled anode and the control utmost point through diode D7, D8, D9, D10, D11, D12.
The formation of major loop of the present invention and connected mode are: main circuit power controllable silicon S1, S2, S3, S4, S5, the negative electrode of S6 respectively with resistance R 2, R4, R6, R5, R3, R1 connects, R1, C3 is connected with the negative electrode of voltage-stabiliser tube D1, R2, and C3 is connected R3 with the negative electrode of voltage-stabiliser tube D2, C4 is connected with the negative electrode of voltage-stabiliser tube D3, R4, and C4 is connected R5 with the negative electrode of voltage-stabiliser tube D4, C5 is connected with the negative electrode of voltage-stabiliser tube D5, R6, and C5 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 are connected to the power positive end VCC of control circuit, optocoupler U1, U2,3 pin of U3 respectively with the CAP1 of digital signal processor DSP, CAP2, the CAP3 pin connects.
The T1PWM of DSP, T2PWM, T3PWM pin respectively with bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, and 2 pin of optocoupler U4 are connected with 3 pin, 2 pin of optocoupler U5 are connected with 3 pin, and 2 pin of optocoupler U6 are connected with 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 14, R15, R16 connects, resistance R 14, R15, R16 also connects with power supply VCC and is connected optocoupler U4, U5,5 pin of U6 respectively with diode D8, D10, the anode of D12 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D7, D9, the anode of D11 connects, optocoupler U4, U5,6 pin of U6 also connect with resistance R 24 and are connected optocoupler U4, U5,8 pin of U6 also connect with resistance R 23 and are connected the negative electrode of diode D7 and R17, C9, the control utmost point of controllable silicon S1 connects, the negative electrode of diode D8 and R18, C10, the control utmost point of controllable silicon S6 connects, the negative electrode of diode D9 and R19, C11, the control utmost point of controllable silicon S2 connects, the negative electrode of diode D10 and R20, C12, the control utmost point of controllable silicon S5 connects, the negative electrode of diode D11 and R21, C13, the control utmost point of controllable silicon S3 connects, the negative electrode of diode D12 and R22, C14, the control utmost point of controllable silicon S4 connects, R17, and C9 is connected with the negative electrode of controllable silicon S1, R18, C10 is connected with the negative electrode of controllable silicon S6, R19, and C11 is connected with the negative electrode of controllable silicon S2, R20, C12 is connected with the negative electrode of controllable silicon S5, R21, and C13 is connected with the negative electrode of controllable silicon S3, R22, C14 is connected with the negative electrode of controllable silicon S4, controllable silicon S1, S2, the anode of S3 and connecing with R23 is connected, controllable silicon S4, S5, the anode of S6 and connecing with R24 is connected.
Claims (3)
1, a kind of digital drive circuit of silicon controlled welding machine major loop is characterized in that adopting a kind of peripheral hardware of enriching that has, and the digital signal processor DSP of high-speed computation and processing is realized silicon controlled welding machine main circuit power silicon controlled digital drive as the master control core:
At first, from the input voltage process resistance R 1 of opposite two windings of phase place on the secondary same iron core of main transformer, R2, R3, R4, R5, R6 and voltage-stabiliser tube D1, D2, D3, D4, D5, D6 are added to and exchange input transistors output optocoupler U1, U2, on the U3, when the input voltage non-zero, U1, U2, the output conducting of U3,3 pin are output as high level, when the input voltage zero passage, U1, U2, U3 by, obtain synchronizing signal thereby 3 pin are output as low level; Then, the task manager CAP1 of dsp controller, CAP2, the CAP3 pin is caught the rising edge of synchronizing signal, produce interrupt requests, the interruption that makes an immediate response of DSP kernel, forward in the interrupt service routine, detect the analog quantity of decision phase shift size potentiometer on the silicon controlled welding machine control panel, this analog quantity becomes digital quantity by the built-in A/D modular converter of DSP, this digital quantity is passed through the initialization to built-in three general purpose timers of DSP again, the phase shift value is sent into timer, built-in three general purpose timers of DSP produce the impulse waveform T1PWM of three tunnel phase shift adjustable size, T2PWM, T3PWM; At last, T1PWM, the T2PWM of DSP output, T3PWM trigger waveform are carried out level through bidirectional thyristor optocoupler U4, U5, U6 and are isolated, bidirectional thyristor optocoupler U4, its output of U5, U6 are 2 groups of two-way admittance IGCTs, receive respectively between the main circuit power silicon controlled anode and the control utmost point through diode D7, D8, D9, D10, D11, D12.
2, the digital drive circuit of this silicon controlled welding machine major loop according to claim 1 is characterized in that the formation of major loop and connected mode are: main circuit power controllable silicon S1, S2, S3, S4, S5, the negative electrode of S6 respectively with resistance R 2, R4, R6, R5, R3, R1 connects, R1, C3 is connected with the negative electrode of voltage-stabiliser tube D1, R2, and C3 is connected with the negative electrode of voltage-stabiliser tube D2, R3, C4 is connected with the negative electrode of voltage-stabiliser tube D3, R4, and C4 is connected with the negative electrode of voltage-stabiliser tube D4, R5, C5 is connected with the negative electrode of voltage-stabiliser tube D5, R6, and C5 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 are connected to the power positive end VCC of control circuit, optocoupler U1, U2,3 pin of U3 respectively with the CAP1 of digital signal processor DSP, CAP2, the CAP3 pin connects.
3, the digital drive circuit of this silicon controlled welding machine major loop according to claim 1 is characterized in that the T1PWM of DSP, T2PWM, the T3PWM pin respectively with bidirectional thyristor optocoupler U4, U5,4 pin of U6 connect, 2 pin of optocoupler U4 are connected with 3 pin, and 2 pin of optocoupler U5 are connected with 3 pin, and 2 pin of optocoupler U6 are connected with 3 pin, optocoupler U4, U5,1 pin of U6 respectively with resistance R 14, R15, R16 connects, resistance R 14, R15, R16 also connects with power supply VCC and is connected optocoupler U4, U5,5 pin of U6 respectively with diode D8, D10, the anode of D12 connects, optocoupler U4, U5,7 pin of U6 respectively with diode D7, D9, the anode of D11 connects, optocoupler U4, U5,6 pin of U6 also connect with resistance R 24 and are connected optocoupler U4, U5,8 pin of U6 also connect with resistance R 23 and are connected the negative electrode of diode D7 and R17, C9, the control utmost point of controllable silicon S1 connects, the negative electrode of diode D8 and R18, C10, the control utmost point of controllable silicon S6 connects, the negative electrode of diode D9 and R19, C11, the control utmost point of controllable silicon S2 connects, the negative electrode of diode D10 and R20, C12, the control utmost point of controllable silicon S5 connects, the negative electrode of diode D11 and R21, C13, the control utmost point of controllable silicon S3 connects, the negative electrode of diode D12 and R22, C14, the control utmost point of controllable silicon S4 connects, R17, C9 is connected with the negative electrode of controllable silicon S1, R18, and C10 is connected with the negative electrode of controllable silicon S6, R19, C11 is connected with the negative electrode of controllable silicon S2, R20, and C12 is connected with the negative electrode of controllable silicon S5, R21, C13 is connected with the negative electrode of controllable silicon S3, R22, and C14 is connected with the negative electrode of controllable silicon S4, controllable silicon S1, S2, the anode of S3 also connects with R23 and is connected controllable silicon S4, S5, the anode of S6 and connecing with R24 is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021122652A CN1186162C (en) | 2002-06-27 | 2002-06-27 | Digital driving circuit for main circuit of silicon controlled welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021122652A CN1186162C (en) | 2002-06-27 | 2002-06-27 | Digital driving circuit for main circuit of silicon controlled welding machine |
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| CN1385273A true CN1385273A (en) | 2002-12-18 |
| CN1186162C CN1186162C (en) | 2005-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021122652A Expired - Fee Related CN1186162C (en) | 2002-06-27 | 2002-06-27 | Digital driving circuit for main circuit of silicon controlled welding machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305627C (en) * | 2004-12-23 | 2007-03-21 | 上海交通大学 | Bi-number signal processor control system of submerged arc welding machine |
| CN100387358C (en) * | 2005-07-21 | 2008-05-14 | 上海交通大学 | Digital control system of electrical arc spraying power source |
| CN102023280A (en) * | 2010-10-28 | 2011-04-20 | 哈尔滨工业大学 | Measuring circuit for thyristor operating angle and triggering angle of alternating-current resistance welder |
| CN101722347B (en) * | 2008-10-17 | 2012-06-27 | 唐山松下产业机器有限公司 | Thyristor welder and protecting circuit thereof |
| CN103817407A (en) * | 2014-03-14 | 2014-05-28 | 上海沪工焊接集团股份有限公司 | Driving circuit |
-
2002
- 2002-06-27 CN CNB021122652A patent/CN1186162C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305627C (en) * | 2004-12-23 | 2007-03-21 | 上海交通大学 | Bi-number signal processor control system of submerged arc welding machine |
| CN100387358C (en) * | 2005-07-21 | 2008-05-14 | 上海交通大学 | Digital control system of electrical arc spraying power source |
| CN101722347B (en) * | 2008-10-17 | 2012-06-27 | 唐山松下产业机器有限公司 | Thyristor welder and protecting circuit thereof |
| CN102023280A (en) * | 2010-10-28 | 2011-04-20 | 哈尔滨工业大学 | Measuring circuit for thyristor operating angle and triggering angle of alternating-current resistance welder |
| CN102023280B (en) * | 2010-10-28 | 2012-09-05 | 哈尔滨工业大学 | Measuring circuit for thyristor operating angle and triggering angle of alternating-current resistance welder |
| CN103817407A (en) * | 2014-03-14 | 2014-05-28 | 上海沪工焊接集团股份有限公司 | Driving circuit |
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| Publication number | Publication date |
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| CN1186162C (en) | 2005-01-26 |
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