CN101741002A - Inductance-capacitance sine transform CO2 laser power supply - Google Patents
Inductance-capacitance sine transform CO2 laser power supply Download PDFInfo
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- CN101741002A CN101741002A CN200910273381A CN200910273381A CN101741002A CN 101741002 A CN101741002 A CN 101741002A CN 200910273381 A CN200910273381 A CN 200910273381A CN 200910273381 A CN200910273381 A CN 200910273381A CN 101741002 A CN101741002 A CN 101741002A
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Abstract
The invention relates to an inductance-capacitance sine transform CO2 laser power supply which comprises a drive circuit, a laser output control circuit, a current sampling circuit, a main circuit and a DSP (Digital Signal Processor) controller circuit. The main circuit unit adopts an inductance-capacitance sine transform circuit, and a DSP controller which is used for digitally processing current feedback signals. The invention has the advantages that the inductance-capacitance sine transform circuit enables the output end to obtain the current which is proportional to the voltage at the input end and is irrelative with the load impedance change, can well satisfy the load characteristics of CO2 laser tubes, and provides matched energy supply to the normal work of the laser tubes; by using the DSP controller to monitor the load current, the user can find whether the CO2 laser tube is abnormal or not in time, thus preventing the damage to the laser power supply caused by abnormality; the full digital control guarantees the high control precision, high response speed and good stability of the power supply.
Description
Technical field
To the present invention relates to DSP be kernel control chip, utilize inductance-capacitance sine transform to produce is suitable for CO
2The excitation power supply technical field of laser tube load characteristic, a kind of specifically inductance-capacitance sine transform CO
2Laser Power Devices.
Background technology
At present, the Chinese laser industry development is swift and violent, and laser is widely used in every field such as welding, cutting, mark, scribing, quarter film; And the development of Laser Power Devices has become an important bottleneck of restriction laser industry development, and functional reliability is not high enough, and output is stable inadequately to be the commonplace problem of common Laser Power Devices on the current market.Main cause is main circuit topology and the CO that most products adopt
2The load characteristic of laser tube is incompatible, causes power supply fragile, influences system's operate as normal.Simultaneously, because load C O
2Laser tube easily leaks gas, and abnormal problems such as breakage also easily cause the damage of power supply.In addition, its product all is to adopt analog circuit control basically, and its control precision and response speed all are difficult to satisfy the high-precision requirement of system.
Summary of the invention
The objective of the invention is to design the inductance-capacitance sine transform CO that a kind of DSP of employing is the technical scheme of core controller and inductance-capacitance sine transform circuit
2Laser Power Devices.
A kind of inductance-capacitance sine transform CO of the present invention
2Laser Power Devices comprise: drive circuit, laser output control circuit, current sampling circuit also have and adopt inductance-capacitance sine transform circuit, the dsp controller of digitized processing current feedback signal in the main circuit unit.
Main circuit unit comprises: current rectifying and wave filtering circuit, half-bridge inversion circuit, inductance-capacitance sine transform circuit and high-voltage conversion circuit.
The inductance-capacitance sine transform circuit is made up of inductance (L3), electric capacity (C10), high voltage package (T2); Wherein the former limit of high voltage package (T2) is imported two taps and is connected with electric capacity (C10) two pins respectively, and the 1st tap on the former limit of high voltage package (T2) is connected with the 2nd tap of inductance (L3) simultaneously.
Dsp controller, current feedback circuit is made up of operational amplifier (U3) and related peripheral device, and current feedback signal carries out digitized processing through current feedback unit input DSP control unit.
Dsp controller is the TMS320LF2401 digital signal processor.
Main circuit unit comprises: the 220V alternating current inserts through the thermistor (R1) of fuse (F1) and anti-surge; After the filter circuit of being made up of electric capacity (C1, C2, C3, C4) and inductance (L1) carries out filtering again, be transformed into direct current about 300V by rectifier bridge (V1); Electric capacity (C5, C6) and power tube (Q1, Q2) are formed half-bridge inversion circuit, and discharge resistance (R4, R5) is in parallel with electric capacity (C5, C6) respectively, and fly-wheel diode (D1, D2) is in parallel with power tube (Q1, Q2) respectively; Resistance (R10) be connected in parallel on power tube (Q1) two ends again after electric capacity (C7) is connected, resistance (R11) be connected in parallel on power tube (Q2) two ends again after electric capacity (C8) is connected; Inductance (L3) and electric capacity (C10) are composed in series the inductance-capacitance sine transform circuit, (L3) other end links to each other with inductance (L2), electric capacity (C10) other end is connected with capacitance (C9), the tie point of electric capacity (C9) other end and brachium pontis electric capacity (C5, C6) joins, and high voltage package (T2) is connected in parallel on the electric capacity (C10).
Drive circuit comprises: the signal pins of output PWM ripple in resistance (R5, R6) the termination dsp controller, and the base stage of the other end and triode (T1, T4) is joined; Triode (T1, T4) and resistance (R8, R9) are amplifying circuit, the base stage of one end of the collector electrode of triode (T1) and resistance (R8) and triode (T2, T3) is joined, the base stage of one end of the collector electrode of triode (T4) and resistance (R9) and triode (T5, T6) is joined, the grounded emitter of triode (T1, T4); Resistance (R7) termination driving power, the other end links to each other with two push-pull circuits that triode (T2, T3, T5, T6) is formed respectively, and diode (D4, D5, D6, D7) is connected in parallel on collector electrode and the emitter of triode (T2, T3, T5, T6) respectively; One end of electric capacity (C28, C29) joins with the negative electrode of diode (D5, D7) respectively, and 4,6 pin of the other end and driver module (U4) join respectively.
The laser output control circuit comprises: resistance (R25, R26) and electric capacity (C30, C31) are formed the starting or stopping control circuit of two groups of Laser Power Devices outputs respectively; Resistance (R25, a R26) end and power supply join, and the signal pins of the other end and DSP control chip is joined; The signal pins of electric capacity (C30, a C31) end and dsp controller is joined other end ground connection; Diode (D8) anode connects energy control voltage, and negative pole connects divider resistance (R12), the A/D thief hatch of another termination dsp controller of resistance (R12); The A/D thief hatch of one termination DSP of electric capacity (C12, C13) and resistance (R13), other end ground connection; The negative electrode of diode (D9) connects the A/D thief hatch of dsp controller, plus earth.
Current sampling circuit, by operational amplifier (U3), electric capacity (C14, C15, C16, C17), resistance (R14, R15, R16) and magnetic bead (L2), voltage-stabiliser tube (D10, D11) are formed; Current feedback signal is through resistance (R14) input operational amplifier (U3) the 6th pin, operational amplifier (U3) the 5th pin ground connection; One pin of resistance (R15) is connected with operational amplifier (U3) the 6th pin, and another pin is connected with operational amplifier (U3) the 7th pin; One pin of electric capacity (C14) is connected with operational amplifier (U3) the 6th pin, and another pin is connected with operational amplifier (U3) the 7th pin; One pin of electric capacity (C15) is connected with the 7th pin of operational amplifier, another pin ground connection; One pin of magnetic bead (L2) is connected with the 7th pin of operational amplifier, and the negative electrode of another pin and voltage-stabiliser tube (D10, D11) joins, voltage-stabiliser tube (D10, D11) plus earth; The negative electrode of electric capacity (C16) pin and voltage-stabiliser tube (D10) joins, another pin ground connection; The negative electrode of electric capacity (C17) pin and voltage-stabiliser tube (D10) joins, another pin ground connection; The negative electrode of resistance (R16) pin and voltage-stabiliser tube (D10) joins, another pin ground connection.
A kind of inductance-capacitance sine transform CO of the present invention
2Laser Power Devices are achieved in that the half-bridge circuit that utilizes power tube (Q1, Q2) to form realizes the high frequency conversion to electric energy, inductance (L3), electric capacity (C10) adopt the mode of series connection, to the effect that the electric energy of high frequency conversion has sinusoidal resonance, make output obtain to be directly proportional, change irrelevant electric current with load impedance with input terminal voltage; Power supply inner utilization dsp controller is realized the control of total digitalization; load current on the laser tube is monitored,, can in time be judged anomaly in the software if laser tube leaks air or breakage; and the output of cutting off the electricity supply rapidly, power supply and laser equipment are realized real-time guard.
A kind of inductance-capacitance sine transform CO of the present invention
2The advantage of Laser Power Devices is:
1) the sine transform circuit of inductance capacitance makes output can obtain to be directly proportional with input terminal voltage, changes irrelevant electric current with load impedance, is well positioned to meet CO
2The load characteristic of laser tube is supplied with for the operate as normal of laser tube provides the energy that is complementary;
2) by the monitoring of dsp controller, in time find CO to load current
2Whether laser tube is handled unusually and in real time, prevents to damage Laser Power Devices unusually because of it;
3) Quan Shuozihua control guarantees the control precision height of power supply, fast, the good stability of response speed.
Description of drawings
Fig. 1 is a kind of inductance-capacitance sine transform CO
2The theory diagram of Laser Power Devices.
Fig. 2 is the circuit theory diagrams of main circuit unit.
Fig. 3 is the circuit theory diagrams of drive circuit.
Fig. 4 is the circuit theory diagrams of laser output control circuit.
Fig. 5 is the circuit theory diagrams of current sampling circuit.
Fig. 6 is the circuit theory diagrams of dsp controller circuit.
Embodiment
Shown in Fig. 1-6, a kind of inductance-capacitance sine transform CO
2Laser Power Devices comprise: drive circuit, laser output control circuit, current sampling circuit also have and adopt inductance-capacitance sine transform circuit, the dsp controller of digitized processing current feedback signal in the main circuit unit.
Main circuit unit comprises: current rectifying and wave filtering circuit, half-bridge inversion circuit, inductance-capacitance sine transform circuit and high-voltage conversion circuit.
The inductance-capacitance sine transform circuit is made up of inductance (L3), electric capacity (C10), high voltage package (T2); Wherein the former limit of high voltage package (T2) is imported two taps and is connected with electric capacity (C10) two pins respectively, and the 1st tap on the former limit of high voltage package (T2) is connected with the 2nd tap of inductance (L3) simultaneously.
Dsp controller, current feedback circuit is made up of operational amplifier (U3) and related peripheral device, and current feedback signal carries out digitized processing through current feedback unit input dsp controller.
Dsp controller is the TMS320LF2401 digital signal processor.
Main circuit unit comprises: the 220V alternating current inserts through the thermistor (R1) of fuse (F1) and anti-surge; After the filter circuit of being made up of electric capacity (C1, C2, C3, C4) and inductance (L1) carries out filtering again, be transformed into direct current about 300V by rectifier bridge (V1); Electric capacity (C5, C6) and power tube (Q1, Q2) are formed half-bridge inversion circuit, and discharge resistance (R4, R5) is in parallel with electric capacity (C5, C6) respectively, and fly-wheel diode (D1, D2) is in parallel with power tube (Q1, Q2) respectively; Resistance (R10) be connected in parallel on power tube (Q1) two ends again after electric capacity (C7) is connected, resistance (R11) be connected in parallel on power tube (Q2) two ends again after electric capacity (C8) is connected; Inductance (L3) and electric capacity (C10) are composed in series the inductance-capacitance sine transform circuit, (L3) other end links to each other with inductance (L2), electric capacity (C10) other end is connected with capacitance (C9), electric capacity (C9) other end and brachium pontis electric capacity (C5, C6) tie point joins, high voltage package (T2) is connected in parallel on the electric capacity (C10), one end of one end of resistance (R8) and resistance (R9) joins, 1 pin of the other end of resistance (R8) and the driver module in the drive circuit (U4) joins, 2 pin of the other end of resistance (R9) and the driver module in the drive circuit (U4) join, one end of one end of resistance (R6) and resistance (R7) joins, 9 pin of the other end of resistance (R6) and the driver module in the drive circuit (U4) join, and 8 pin of the other end of resistance (R9) and the driver module in the drive circuit (U4) join.
Drive circuit comprises: resistance (R5, a R6) end respectively with the dsp controller circuit in 10,12 pin of (U1), the base stage of the other end and triode (T1, T4) is joined; Triode (T1, T4) and resistance (R8, R9) are amplifying circuit, the base stage of one end of the collector electrode of triode (T1) and resistance (R8) and triode (T2, T3) is joined, the base stage of one end of the collector electrode of triode (T4) and resistance (R9) and triode (T5, T6) is joined, the grounded emitter of triode (T1, T4); Resistance (R7) termination driving power, the other end links to each other with two push-pull circuits that triode (T2, T3, T5, T6) is formed respectively, and diode (D4, D5, D6, D7) is connected in parallel on collector electrode and the emitter of triode (T2, T3, T5, T6) respectively; One end of electric capacity (C28, C29) joins with the negative electrode of diode (D5, D7) respectively, and 4,6 pin of the other end and driver module (U4) join respectively.
The laser output control circuit comprises: resistance (R25, R26) and electric capacity (C30, C31) are formed the starting or stopping control circuit of two groups of Laser Power Devices outputs respectively; Resistance (R25, a R26) end and power supply join, and the signal pins of the other end and dsp controller is joined; Electric capacity (C30, a C31) end respectively with the dsp controller circuit in 28,27 pin of (U1) join other end ground connection; Diode (D8) anode connects energy control voltage, and negative terminal connects divider resistance (R12), and 29 pin of (U1) join in another termination dsp controller circuit of resistance (R12); The A/D thief hatch of one termination DSP of electric capacity (C12, C13) and resistance (R13), other end ground connection; The negative electrode of diode (D9) connects the A/D thief hatch of dsp controller, plus earth.
Current sampling circuit, by operational amplifier (U3), electric capacity (C14, C15, C16, C17), resistance (R14, R15, R16) and magnetic bead (L2), voltage-stabiliser tube (D10, D11) are formed; Current feedback signal is through resistance (R14) input operational amplifier (U3) the 6th pin, operational amplifier (U3) the 5th pin ground connection; One pin of resistance (R15) is connected with operational amplifier (U3) the 6th pin, and another pin is connected with operational amplifier (U3) the 7th pin; One pin of electric capacity (C14) is connected with operational amplifier (U3) the 6th pin, and another pin is connected with operational amplifier (U3) the 7th pin; One pin of electric capacity (C15) is connected with the 7th pin of operational amplifier, another pin ground connection; One pin of magnetic bead (L2) is connected with the 7th pin of operational amplifier, and the negative electrode of another pin and voltage-stabiliser tube (D10, D11) joins, voltage-stabiliser tube (D10, D11) plus earth; The negative electrode of electric capacity (C16) pin and voltage-stabiliser tube (D10) joins, another pin ground connection; The negative electrode of electric capacity (C17) pin and voltage-stabiliser tube (D10) joins, another pin ground connection; The negative electrode of resistance (R16) pin and voltage-stabiliser tube (D10) joins, and with the dsp controller circuit in 17 pin of digital signal processor (U1) join another pin ground connection.
The dsp controller circuit, TMS320LF2401 forms by digital signal processor, 10 pin of digital signal processor (U1) and the resistance R 5 in the drive circuit are joined, 12 pin of digital signal processor (U1) and the resistance R 6 in the drive circuit are joined, one end of 28 pin of digital signal processor (U1) and the electric capacity (C30) in the laser output control circuit joins, one end of 27 pin of digital signal processor (U1) and the electric capacity (C31) in the laser output control circuit joins, one end of 29 pin of digital signal processor (U1) and the electric capacity (R12) in the laser output control circuit joins, and an end of 17 pin of digital signal processor (U1) and the resistance (R16) in the current sampling circuit joins.
Claims (4)
1. inductance-capacitance sine transform CO
2Laser Power Devices, comprise: drive circuit, laser output control circuit and current sampling circuit, it is characterized in that: also have main circuit and dsp controller circuit, adopt inductance-capacitance sine transform circuit, the dsp controller of digitized processing current feedback signal in the main circuit unit.
2. inductance-capacitance sine transform CO according to claim 1
2Laser Power Devices is characterized in that: main circuit unit comprises: current rectifying and wave filtering circuit, half-bridge inversion circuit, inductance-capacitance sine transform circuit and high-voltage conversion circuit.
3. inductance-capacitance sine transform CO according to claim 1
2Laser Power Devices is characterized in that: the inductance-capacitance sine transform circuit, form by inductance (L3), electric capacity (C10), high voltage package (T2); Wherein the former limit of high voltage package (T2) is imported two taps and is connected with electric capacity (C10) two pins respectively, and the 1st tap on the former limit of high voltage package (T2) is connected with the 2nd tap of inductance (L3) simultaneously.
4. inductance-capacitance sine transform CO according to claim 1
2Laser Power Devices, it is characterized in that: the dsp controller circuit, TMS320LF2401 forms by digital signal processor, 10 pin of digital signal processor (U1) and the resistance R 5 in the drive circuit are joined, 12 pin of digital signal processor (U1) and the resistance R 6 in the drive circuit are joined, one end of 28 pin of digital signal processor (U1) and the electric capacity (C30) in the laser output control circuit joins, one end of 27 pin of digital signal processor (U1) and the electric capacity (C31) in the laser output control circuit joins, one end of 29 pin of digital signal processor (U1) and the resistance (R12) in the laser output control circuit joins, and an end of 17 pin of digital signal processor (U1) and the resistance (R16) in the current sampling circuit joins.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910273381XA CN101741002B (en) | 2009-12-25 | 2009-12-25 | Inductance-capacitance sine transform CO2 laser power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910273381XA CN101741002B (en) | 2009-12-25 | 2009-12-25 | Inductance-capacitance sine transform CO2 laser power supply |
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| CN101741002A true CN101741002A (en) | 2010-06-16 |
| CN101741002B CN101741002B (en) | 2011-12-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005691A (en) * | 2010-09-28 | 2011-04-06 | 中国船舶重工集团公司第七○九研究所 | Method for controlling laser power supply energy based on DSP (Digital Signal Processor) |
| CN103797664A (en) * | 2011-08-23 | 2014-05-14 | 相干公司 | Apparatus and method for balancing combined RF power-supplies for driving a CO2 gas-discharge laser |
| CN107942142A (en) * | 2017-11-27 | 2018-04-20 | 江苏万宝桥梁构件有限公司 | A kind of detection device of large scale equipment electrostatic core release device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204632U (en) * | 1987-09-25 | 1988-06-22 | 湖南省技术物理研究所 | Co2 laser electric source for generating high voltage pulse of transistor |
-
2009
- 2009-12-25 CN CN200910273381XA patent/CN101741002B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005691A (en) * | 2010-09-28 | 2011-04-06 | 中国船舶重工集团公司第七○九研究所 | Method for controlling laser power supply energy based on DSP (Digital Signal Processor) |
| CN102005691B (en) * | 2010-09-28 | 2013-02-06 | 中国船舶重工集团公司第七0九研究所 | Method for controlling laser power supply energy based on DSP (Digital Signal Processor) |
| CN103797664A (en) * | 2011-08-23 | 2014-05-14 | 相干公司 | Apparatus and method for balancing combined RF power-supplies for driving a CO2 gas-discharge laser |
| CN103797664B (en) * | 2011-08-23 | 2016-05-18 | 相干公司 | For balance drive CO2Equipment and the method for the combination RF power supply of gas discharge laser |
| CN107942142A (en) * | 2017-11-27 | 2018-04-20 | 江苏万宝桥梁构件有限公司 | A kind of detection device of large scale equipment electrostatic core release device |
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| Publication number | Publication date |
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| CN101741002B (en) | 2011-12-14 |
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