CN101447638A - Laser excitation power supply and excitation method thereof - Google Patents
Laser excitation power supply and excitation method thereof Download PDFInfo
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- CN101447638A CN101447638A CNA2008102403143A CN200810240314A CN101447638A CN 101447638 A CN101447638 A CN 101447638A CN A2008102403143 A CNA2008102403143 A CN A2008102403143A CN 200810240314 A CN200810240314 A CN 200810240314A CN 101447638 A CN101447638 A CN 101447638A
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- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000012937 correction Methods 0.000 claims description 89
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Abstract
The invention relates to a laser excitation power supply and an excitation method thereof. The laser excitation power supply comprises a discharging main circuit, a sampling feedback control circuit and a weak current unit, wherein, the discharging main circuit comprises an anti-jamming filtering circuit, a power factor correcting unit, a power conversion unit and an IGBT discharging unit, which are electrically connected in sequence; the sampling feedback control circuit comprises a central control unit, a precombustion lighting unit and two electrical current sensors; the central control unit is respectively connected with the power factor correcting unit, the power conversion unit, the IGBT discharging unit, the precombustion lighting unit and the two electrical current sensors; the precombustion lighting unit is respectively connected with the power factor correcting unit, the IGBT discharging unit and the central control unit; electrical current output by the power factor correcting unit and the IGBT discharging unit is acquired by the two current sensors and transferred to the central control unit; and the central control unit judges the transferred electrical current, and controls the stable output of the power factor correcting unit and the IGBT discharging unit according to judged results. The invention improves the output power factor and the discharging stability.
Description
Technical field
The present invention relates to a kind of power supply and using method thereof, particularly about a kind of laser excitation power supply and motivational techniques thereof.
Background technology
Recent two decades comes, laser processing technology formerly system to make the status of manufacture field more and more important, particularly at medical field, improve the controllability of laser equipment, stability, high efficiency and the security reliability of operation become the core of laser equipment development.And in laser equipment, power supply is the technology of most critical wherein, and the performance of power supply and index are determining the technical merit of laser equipment.But the power supply that uses in the existing laser equipment often exists that power consumption is big, power factor is low, discharge instability, and problem such as output voltage range is narrow.
Summary of the invention
At the problems referred to above, the purpose of this invention is to provide a kind of output power factor height, output voltage range is wide, and the laser excitation power supply and the motivational techniques thereof of discharge stability.
For achieving the above object, the present invention takes following technical scheme: a kind of laser excitation power supply is characterized in that comprising: discharge main circuit, a sampling feedback control circuit and a light current unit; Described discharge main circuit comprises an anti-interference filtration circuit, a power factor correction unit, a Power Conversion unit and an IGBT discharge cell that is electrically connected successively; Described sampling feedback control circuit comprises a central control unit, a pre-burning lighting unit and two current sensors; Wherein, described anti-interference filtration circuit is connected the output of external power grid with the input of light current unit; Described central control unit connects described power factor correction unit, Power Conversion unit, IGBT discharge cell, pre-burning lighting unit and two current sensors respectively; Described pre-burning lighting unit connects described power factor correction unit, IGBT discharge cell, central control unit respectively; The input of one described current sensor is connected between described power factor correction unit and the Power Conversion unit, the input of another described current sense connects the output of described IGBT discharge cell, and the output of two described current sensors all connects described central control unit; Described light current unit is given described power factor correction unit, Power Conversion unit, IGBT discharge cell, central control unit and the power supply of pre-burning lighting unit simultaneously; Two described current sensors are gathered described power factor correction unit and IGBT discharge cell output current, flow to described central control unit, described central control unit judges the electric current of described conveying, and controls described power factor correction unit and the IGBT discharge cell is stably exported according to judged result.
Described central control unit comprises a CPU and a logic control element, and described CPU connects described power factor correction unit, Power Conversion unit, IGBT discharge cell, pre-burning lighting unit, each current sensor and light current unit respectively by described logic control element.
Described power factor correction unit comprises a rectification soft starting circuit, a power factor correction auxiliary circuit and a power factor correction lossless absorption circuit that connects successively; The input of described rectification soft starting circuit connects the output of described anti-interference filtration circuit; Described power factor correction unit comprises also that successively one of serial connection enables control circuit, a pwm unit, one drive circuit and a protective circuit; Wherein said protective circuit is connected between the input of the output of described power factor correction auxiliary circuit and power factor correction lossless absorption circuit; The output of described power factor correction lossless absorption circuit is connected with the input of described Power Conversion unit, and described power factor correction lossless absorption circuit is connected the input of a described current sensor with the contact of described Power Conversion unit; The sample rate current of this current sensor is imported described logic control element, described logic control element and described CPU interactive information, described CPU flows to described control circuit and the pwm unit of enabling respectively with level instruction and pulse-width modulation instruction.
Described IGBT discharge cell comprises a discharge loop, a protective circuit, a pulse-width modulation circuit, an IGBT drive circuit, a voltage treatment circuit and a frequency modulation circuit; Wherein, described protective circuit connects described pulse-width modulation circuit, IGBT drive circuit and discharge loop successively; Described pulse-width modulation circuit connects described voltage treatment circuit and frequency modulation circuit; The positive output end of described discharge loop connects the input of described Power Conversion unit and the input of a described current sensor; The sample rate current of this current sensor is imported described logic control element; described logic control element and described CPU interactive information, described CPU flows to described protective circuit and the pulse-width modulation circuit of making respectively with level instruction and pulse-width modulation instruction.
Discharge loop in the described IGBT discharge cell comprises IGBT pipe, a diode, an xenon flash lamp, a resistance and an electric capacity that connects successively; The positive output end of described discharge loop is the contact between the positive plate of the drain electrode of described IGBT pipe and described electric capacity; The input of described IGBT lossless absorption circuit is connected between the anode of the source electrode of described IGBT pipe and diode, and the output of described IGBT lossless absorption circuit is the negative output terminal of described discharge loop; Described IGBT drive circuit connects the grid of described IGBT pipe.
A kind of motivational techniques of using the laser excitation power supply, it is characterized in that: it may further comprise the steps: 1) be provided with one and comprise the supply unit of an anti-interference filtration circuit, a power factor correction unit, a Power Conversion unit, an IGBT discharge cell, a light current unit, a central control unit and a pre-burning lighting unit, and the anti-interference filtration circuit is connected the output of external power grid with the input of light current unit; 2) the anti-interference filtration circuit flows to power factor correction unit to the current filtering of external power grid input; 3) power factor correction unit is exported to the Power Conversion unit with too high voltages/current-clamp to a stationary value of input; 4) the low frequency direct current after power factor correction unit is proofreaied and correct in the Power Conversion unit changes high-frequency DC into, flows to the IGBT discharge cell; 5) charging of IGBT discharge cell is given in the Power Conversion unit.
The present invention is owing to take above technical scheme, and it has the following advantages: 1, because the present invention has adopted the mode of pulse-width modulation, improved the stability of power supply discharge, and can obtain high electrical power output by increasing the input of electrical power.2, because the present invention has adopted circuit of power factor correction, not only obtained stable high electrical power output, also reduced the loss of electrical power.3, because the present invention has adopted the Power Conversion unit, it is that the electrical power of output is further amplified, thereby has obtained higher electrical power output.4, be provided with a lossless absorption circuit in the IGBT discharge cell among the present invention, it can be further stable with the electrical power of output, thereby improved the stability of excitation power supply discharge.External power grid input voltage and wide frequency range that the present invention adopts can be widely used in various lasers.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a power factor correction unit structural representation among the present invention
Fig. 3 is the structural representation of IGBT discharge cell among the present invention
Fig. 4 is the structural representation of pre-burning lighting unit among the present invention
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
As shown in Figure 1, the present invention includes an anti-interference filtration circuit 1, a power factor correction unit 2, a Power Conversion unit 3, an IGBT (Insulated Gate Bipolar Transistor, igbt) discharge cell 4, a central control unit 5, a pre-burning lighting unit 6, two current sensors 7 and 8 and one light current unit 9.Wherein, anti-interference filtration circuit 1, power factor correction unit 2, Power Conversion unit 3 and the IGBT discharge cell 4 discharge main circuit that is electrically connected to form successively, central control unit 5, pre-burning lighting unit 6 and two current sensors 7 and 8 constitute a sampling feedback control circuit.
In the above-mentioned discharge main circuit, the input of anti-interference filtration circuit 1 connects the output of external power grid.Power Conversion unit 3 is an inverter circuit, and it changes the low frequency direct current into high-frequency DC, is used for to 4 chargings of IGBT discharge cell.
In the above-mentioned sampling feedback control circuit, central control unit 5 comprises a CPU 51 and a logic control element 52, logic control element 52 carries out information interaction with CPU 51, and CPU 51 connects power factor correction unit 2, Power Conversion unit 3, IGBT discharge cell 4, pre-burning lighting unit 6, current sensor 7 and 8 and light current unit 9 respectively by logic control element 52.CPU 51 wherein can adopt single-chip microcomputer, also can adopt other control appliance, and logic control element 52 adopts a programmable logic device, but is not limited thereto.Pre-burning lighting unit 6 connects power factor correction unit 2, IGBT discharge cell 4, central control unit 5.The input of current sensor 7 is connected between power factor correction unit 2 and the Power Conversion unit 3, and its output connects logic control element 52.The input of current sensor 8 connects the output of IGBT discharge cell 4, and its output connects logic control element 52.
Light current unit 9 adopts a light current plate, and its input connects the output of external power grid, the stabilizing low voltage power supply is provided for power factor correction unit 2, Power Conversion unit 3, IGBT discharge cell 4, central control unit 5 and pre-burning lighting unit 6.
In the foregoing description, external power grid flows to power factor correction unit 2 after the alternating current of 90V～264V is flowed to 1 filtering of anti-interference filtration circuit.Power factor correction unit 2 after exporting to Power Conversion unit 3 and carrying out power transfer, flows to 4 chargings of IGBT discharge cell with too high voltages/current-clamp to a stationary value of input.The IGBT discharge cell 4 that charging finishes can discharge to laser by its output OUT.
In said process, current sensor 7 is gathered the output current of power factor correction unit 2, afterwards sample rate current is flowed to logic control element 52, judges by logic control element 52 whether sample rate current is normal.If electric current is normal, logic control element 52 sends the electric current normal signal to CPU 51, and CPU 51 is sent a charging by logic control element 52 to Power Conversion unit 3 and opened instruction then.If there is over-current phenomenon avoidance, logic control element 52 sends to CPU 51 with the overcurrent signal, and CPU 51 sends an instruction of stablizing output current to power factor correction unit 2.
As shown in Figure 2, power factor correction unit 2 comprises a rectification soft starting circuit 21, a power factor correction auxiliary circuit 22 and a power factor correction lossless absorption circuit 23 that connects successively.The input of rectification soft starting circuit 21 connects the output of anti-interference filtration circuit 1, is direct current with filtered AC rectification.Rectification soft starting circuit 21 also connects light current unit 9, is used for to power factor correction unit 2 power supplies.
Power factor correction unit 2 comprises also that successively one of serial connection enables control circuit 24, a pwm unit 25, one drive circuit 26 and a protective circuit 27.Wherein protective circuit 27 is connected between the input of the output of power factor correction auxiliary circuit 22 and power factor correction lossless absorption circuit 23, and protective circuit 27 is used for power factor correction auxiliary circuit 22 is carried out current-limiting protection.The earth terminal earth connection GND of power factor correction auxiliary circuit 22 and power factor correction lossless absorption circuit 23, and the capacitor C 1 of a filtering and a grading resistor R1 are connected in parallel between the output and ground wire GND of power factor correction lossless absorption circuit 23, are used for the voltage/current of stable output.The output of power factor correction lossless absorption circuit 23 is connected with the input of Power Conversion unit 3, and power factor correction lossless absorption circuit 23 is connected the input of current sensor 7 with the contact of Power Conversion unit 3.The sample rate current input logic control unit 52 of current sensor 7, logic control element 52 carries out information interaction with CPU 51, and CPU 51 is instructed level instruction and a pulse-width modulation to flow to respectively and enabled control circuit 24 and pwm unit 25.
In the foregoing description, after anti-interference filtration circuit 1 is direct current with filtered alternating current by 21 rectifications of rectification soft starting circuit, by power factor correction auxiliary circuit 22 and power factor correction lossless absorption circuit 23, export to Power Conversion unit 3 more successively.
As shown in Figure 3, IGBT discharge cell 4 comprises a discharge loop 41, one protective circuits 42, one pulse-width modulation circuits 43, an IGBT drive circuit 44, a voltage treatment circuit 45 and a frequency modulation circuit 46.Discharge loop 41 comprises an IGBT lossless absorption circuit 47, and an IGBT of serial connection manages 48, one diode D1, an xenon flash lamp L, a resistance R 2 and a capacitor C 2 successively.Wherein, the source electrode of IGBT pipe 48 connects the input of IGBT lossless absorption circuit 47 and the anode of diode D1.The drain electrode of IGBT pipe 48 connects the output terminals A of Power Conversion unit 3, and output terminals A connects the positive plate of capacitor C 2, and the positive plate of capacitor C 2 is as the positive output end of discharge loop 41.The output B of IGBT lossless absorption circuit 47 is as the negative output terminal of IGBT discharge cell 4.Light current unit 9 provides the light current power supply for pulse-width modulation circuit 43, and voltage treatment circuit 45 is connected between light current unit 9 and the pulse-width modulation circuit 43, and input voltage is carried out voltage modulated.Frequency modulation circuit 46 is connected on the pulse-width modulation circuit 43, and input voltage is carried out frequency modulation(FM).Pulse-width modulation circuit 43 is the grid of series IGBT drive circuit 44 and IGBT pipe 48 successively.The input of current sensor 8 connects positive output end; the sample rate current input logic control unit 52 of current sensor 8; logic control element 52 carries out information interaction with CPU 61, and CPU 51 is instructed level instruction and a pulse-width modulation to flow to respectively and made protective circuit 42 and pulse-width modulation circuit 43.IGBT discharge cell 4 also comprises a current-limiting protection circuit 49, and IGBT pipe 48 is carried out current-limiting protection.
In the foregoing description, the high-frequency DC after Power Conversion unit 3 will be changed by the drain electrode of IGBT pipe 48, source electrode, diode D1, xenon flash lamp L, resistance R 2 and the capacitor C 2 of IGBT pipe 48, charges to discharge loop 41 successively.After charging finishes, capacitor C 2 begins discharge, electric current is from the output of capacitor C 2 positive plates, and by the drain electrode of terminal A, IGBT pipe 48, the source electrode and the IGBT lossless absorption circuit 47 of IGBT pipe 48, IGBT lossless absorption circuit 47 is with too high current-clamp to a stationary value successively.The IGBT discharge cell 4 that charging finishes can discharge to laser by its positive and negative output OUT.
In this process, current sensor 8 is gathered electric current at the positive output end place of discharge loop 41, flowing to logic control element 52 judges, if electric current is normal, logic control element 52 sends to CPU 51 with the electric current normal signal, CPU 51 sends a pre-burning and opens instruction to pre-burning lighting unit 6 then, and the charging instruction that sends charging intervals etc. by logic control element 52 is to Power Conversion unit 3 simultaneously, and Power Conversion unit 3 begins to 4 chargings of IGBT discharge cell; If there is over-current phenomenon avoidance, CPU 51 is sent an instruction of forbidding charging operations by logic control element 52 to Power Conversion unit 3,51 whiles of CPU are according to the electric current of current sensor 8 collections simultaneously, order IGBT discharge cell 4 is stablized the electric current of its output once more, the electric current of gathering until current sensor 8 just often, CPU 51 sends a charging by logic control element 52 and opens, Power Conversion unit 3 is given in the instruction in charging interval, after Power Conversion unit 3 finished for 4 chargings of IGBT discharge cell, IGBT discharge cell 4 can discharge to laser safely.
As shown in Figure 4, pre-burning lighting unit 7 comprises a pre-burning main control unit 71, a PDM keyer 72, a frequency setting circuit 73, a pre-burning open circuit 74 and a power circuit 75.Wherein, pre-burning main control unit 71 adopts a pre-burning master control resonant circuit, its input connects the output and the logic control element 52 of power factor correction unit 2, and the output of pre-burning main control unit 71 connects the xenon flash lamp L in the IGBT discharge cell 4, with the energy size of control impuls xenon lamp L release.Pre-burning main control unit 71 carries out information interaction with PDM keyer 72, is provided with a reference voltage in the PDM keyer 72, this reference voltage be can firing pulse xenon lamp L voltage.PDM keyer 72 connects frequency setting circuit 73, pre-burning open circuit 74 and power circuit 75 respectively, and frequency setting circuit 73 flows to PDM keyer 72 with the voltage of input with after frequency modulates.The input of pre-burning open circuit 74 connects CPU 51, and its pre-burning that CPU 51 is sent is opened instruction and flowed to PDM keyer 72; The voltage of light current unit 9 is by power circuit 29 input PDM keyer 72 and pre-burning open circuits 74.
In the foregoing description, pre-burning open circuit 74 is opened instruction with the pre-burning that CPU 51 sends, and flows to PDM keyer 72 and pre-burning main control unit 71 successively.The output voltage that pre-burning main control unit 71 is gathered power factor correction unit 2 flows to PDM keyer 72.The voltage that reference voltage that PDM keyer 72 is inner with it and pre-burning main control unit 71 are gathered compares, when two magnitudes of voltage are unequal, frequency setting circuit 74 with the voltage modulated of pre-burning main control unit 71 output to the reference voltage size, with firing pulse xenon lamp L.When xenon flash lamp L lighted, pre-burning main control unit 71 became function signal by logic control element 62 to CPU 61 feedbacks one pre-burning; When xenon flash lamp L was unignited, frequency setting circuit 74 continued the voltage of pre-burning main control unit 71 outputs is modulated, until firing pulse xenon lamp L.
The inventive method may further comprise the steps:
1) is provided with one and comprises the supply unit of an anti-interference filtration circuit 1, a power factor correction unit 2, a Power Conversion unit 3, an IGBT discharge cell 4, a central control unit 5, a pre-burning lighting unit 6, two current sensors 7 and 8 and one light current unit 9, and anti-interference filtration circuit 1 is connected the output of external power grid with the input of light current unit 9.
2) current filtering and the rectification of the input of the 1 pair of external power grid of anti-interference filtration circuit: external power grid flows to power factor correction unit 2 after the alternating current of 90V～264V is flowed to anti-interference rectifier 1 filtering of power supply.
3) power factor correction unit 2 is with too high voltages/current-clamp to a stationary value of input, export to Power Conversion unit 3: anti-interference filtration circuit 1 is with filtered alternating current, after being direct current by 21 rectifications of rectification soft starting circuit, by power factor correction auxiliary circuit 22, power factor correction lossless absorption circuit 23, export to Power Conversion unit 3 more successively.In this process, current sensor 7 is gathered the electric current of power factor correction unit 2 outputs, flows to logic control element 52, judges by logic control element 52 whether sample rate current is normal.If electric current is normal, logic control element 52 sends the electric current normal signal to CPU 51, and CPU 51 is sent a charging by logic control element 52 to Power Conversion unit 3 and opened instruction then.If there is over-current phenomenon avoidance, logic control element 52 sends to CPU 51 with the overcurrent signal, CPU 51 is sent one and is forbidden the instruction of power factor correction unit 2 to Power Conversion unit 3 output currents, and allow to enable control unit 24 and produce a high level and flow to pwm unit 25, start pwm unit 25; The electric current that while CPU 51 is gathered according to current sensor 7 sends a pulsewidth and instructs to pwm unit 25, pwm unit 25 instructs according to pulsewidth the voltage and the frequency of output is modulated, and voltage and the frequency that modulates flowed to drive circuit 26, with harmless absorptive unit 23 conductings of driving power factor correcting, the harmless absorptive unit 23 of power factor correction is exported to Power Conversion unit 3 with too high voltages/current-clamp to a stationary value of anti-interference filtration circuit 1 input.
4) the low frequency direct current after power factor correction unit 2 is proofreaied and correct in Power Conversion unit 3 changes high-frequency DC into, flows to IGBT discharge cell 4.
5) Power Conversion unit 3 gives the IGBT discharge cell 4 chargings: the high-frequency DC after Power Conversion unit 3 will be changed by the drain electrode of IGBT pipe 48, source electrode, diode D1, xenon flash lamp L, resistance R 2 and the capacitor C 2 of IGBT pipe 48, charges to discharge loop 41 successively.After charging finishes, capacitor C 2 begins discharge, electric current is from the output of capacitor C 2 positive plates, and by the drain electrode of terminal A, IGBT pipe 48, the source electrode and the IGBT lossless absorption circuit 47 of IGBT pipe 48, IGBT lossless absorption circuit 47 is with too high current-clamp to a stationary value successively.The IGBT discharge cell 4 that charging finishes can discharge to laser by its positive and negative output OUT.In this process, current sensor 8 is gathered electric current at the positive output end place of discharge loop 41, flowing to logic control element 52 judges, if electric current is normal, logic control element 52 sends to CPU 51 with the electric current normal signal, CPU 51 sends a pre-burning and opens instruction to pre-burning lighting unit 6 then, and the charging instruction of passing through 52 one charging intervals of transmission of logic control element simultaneously is to Power Conversion unit 3, and Power Conversion unit 3 begins to 4 chargings of IGBT discharge cell; If there is over-current phenomenon avoidance, CPU 51 is sent an instruction of forbidding charging operations by logic control element 52 to Power Conversion unit 3,51 whiles of CPU are according to the electric current of current sensor 8 collections simultaneously, order IGBT discharge cell 4 is stablized the electric current of its output once more, the electric current of gathering until current sensor 8 just often, CPU 51 sends a charging by logic control element 52 and opens, Power Conversion unit 3 is given in the instruction in charging interval, after 4 chargings of IGBT discharge cell were given in Power Conversion unit 3, IGBT discharge cell 4 can discharge to laser safely.
In the various embodiments described above, the structure of each parts, the position is set and connects and all can change to some extent, on the basis of technical solution of the present invention,, should not get rid of outside protection scope of the present invention improvement and the equivalents that individual component is carried out.
Claims (8)
1, a kind of laser excitation power supply is characterized in that comprising: discharge main circuit, a sampling feedback control circuit and a light current unit; Described discharge main circuit comprises an anti-interference filtration circuit, a power factor correction unit, a Power Conversion unit and an IGBT discharge cell that is electrically connected successively; Described sampling feedback control circuit comprises a central control unit, a pre-burning lighting unit and two current sensors;
Wherein, described anti-interference filtration circuit is connected the output of external power grid with the input of light current unit;
Described central control unit connects described power factor correction unit, Power Conversion unit, IGBT discharge cell, pre-burning lighting unit and two current sensors respectively; Described pre-burning lighting unit connects described power factor correction unit, IGBT discharge cell, central control unit respectively; The input of one described current sensor is connected between described power factor correction unit and the Power Conversion unit, the input of another described current sense connects the output of described IGBT discharge cell, and the output of two described current sensors all connects described central control unit; Described light current unit is given described power factor correction unit, Power Conversion unit, IGBT discharge cell, central control unit and the power supply of pre-burning lighting unit simultaneously;
Two described current sensors are gathered described power factor correction unit and IGBT discharge cell output current, flow to described central control unit, described central control unit judges the electric current of described conveying, and controls described power factor correction unit and the IGBT discharge cell is stably exported according to judged result.
2, a kind of laser excitation power supply as claimed in claim 1, it is characterized in that: described central control unit comprises a CPU and a logic control element, and described CPU connects described power factor correction unit, Power Conversion unit, IGBT discharge cell, pre-burning lighting unit, each current sensor and light current unit respectively by described logic control element.
3, a kind of laser excitation power supply as claimed in claim 1 is characterized in that: described power factor correction unit comprises a rectification soft starting circuit, a power factor correction auxiliary circuit and a power factor correction lossless absorption circuit that connects successively; The input of described rectification soft starting circuit connects the output of described anti-interference filtration circuit;
Described power factor correction unit comprises also that successively one of serial connection enables control circuit, a pwm unit, one drive circuit and a protective circuit; Wherein said protective circuit is connected between the input of the output of described power factor correction auxiliary circuit and power factor correction lossless absorption circuit; The output of described power factor correction lossless absorption circuit is connected with the input of described Power Conversion unit, and described power factor correction lossless absorption circuit is connected the input of a described current sensor with the contact of described Power Conversion unit; The sample rate current of this current sensor is imported described logic control element, described logic control element and described CPU interactive information, described CPU flows to described control circuit and the pwm unit of enabling respectively with level instruction and pulse-width modulation instruction.
4, a kind of laser excitation power supply as claimed in claim 2 is characterized in that: described power factor correction unit comprises a rectification soft starting circuit, a power factor correction auxiliary circuit and a power factor correction lossless absorption circuit that connects successively; The input of described rectification soft starting circuit connects the output of described anti-interference filtration circuit;
Described power factor correction unit comprises also that successively one of serial connection enables control circuit, a pwm unit, one drive circuit and a protective circuit; Wherein said protective circuit is connected between the input of the output of described power factor correction auxiliary circuit and power factor correction lossless absorption circuit; The output of described power factor correction lossless absorption circuit is connected with the input of described Power Conversion unit, and described power factor correction lossless absorption circuit is connected the input of a described current sensor with the contact of described Power Conversion unit; The sample rate current of this current sensor is imported described logic control element, described logic control element and described CPU interactive information, described CPU flows to described control circuit and the pwm unit of enabling respectively with level instruction and pulse-width modulation instruction.
5, as claim 1 or 2 or 3 or 4 described a kind of laser excitation power supplies, it is characterized in that: described IGBT discharge cell comprises a discharge loop, one protective circuit, a pulse-width modulation circuit, an IGBT drive circuit, a voltage treatment circuit and a frequency modulation circuit;
Wherein, described protective circuit connects described pulse-width modulation circuit, IGBT drive circuit and discharge loop successively; Described pulse-width modulation circuit connects described voltage treatment circuit and frequency modulation circuit; The positive output end of described discharge loop connects the input of described Power Conversion unit and the input of a described current sensor; The sample rate current of this current sensor is imported described logic control element; described logic control element and described CPU interactive information, described CPU flows to described protective circuit and the pulse-width modulation circuit of making respectively with level instruction and pulse-width modulation instruction.
6, as claim 1 or 2 or 3 or 4 described a kind of laser excitation power supplies, it is characterized in that: the discharge loop in the described IGBT discharge cell comprises IGBT pipe, a diode, an xenon flash lamp, a resistance and an electric capacity that connects successively;
The positive output end of described discharge loop is the contact between the positive plate of the drain electrode of described IGBT pipe and described electric capacity; The input of described IGBT lossless absorption circuit is connected between the anode of the source electrode of described IGBT pipe and diode, and the output of described IGBT lossless absorption circuit is the negative output terminal of described discharge loop; Described IGBT drive circuit connects the grid of described IGBT pipe.
7, a kind of laser excitation power supply as claimed in claim 5 is characterized in that: the discharge loop in the described IGBT discharge cell comprises IGBT pipe, a diode, an xenon flash lamp, a resistance and an electric capacity that connects successively;
The positive output end of described discharge loop is the contact between the positive plate of the drain electrode of described IGBT pipe and described electric capacity; The input of described IGBT lossless absorption circuit is connected between the anode of the source electrode of described IGBT pipe and diode, and the output of described IGBT lossless absorption circuit is the negative output terminal of described discharge loop; Described IGBT drive circuit connects the grid of described IGBT pipe.
8, a kind of motivational techniques of using laser excitation power supply as claimed in claim 1 is characterized in that:
It may further comprise the steps:
1) is provided with one and comprises the supply unit of an anti-interference filtration circuit, a power factor correction unit, a Power Conversion unit, an IGBT discharge cell, a light current unit, a central control unit and a pre-burning lighting unit, and the anti-interference filtration circuit is connected the output of external power grid with the input of light current unit;
2) the anti-interference filtration circuit flows to power factor correction unit to the current filtering of external power grid input;
3) power factor correction unit is exported to the Power Conversion unit with too high voltages/current-clamp to a stationary value of input;
4) the low frequency direct current after power factor correction unit is proofreaied and correct in the Power Conversion unit changes high-frequency DC into, flows to the IGBT discharge cell;
5) charging of IGBT discharge cell is given in the Power Conversion unit.
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| CN2008102403143A CN101447638B (en) | 2008-12-17 | 2008-12-17 | Laser excitation power supply and excitation method thereof |
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| CN2008102403143A CN101447638B (en) | 2008-12-17 | 2008-12-17 | Laser excitation power supply and excitation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680297A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of half-bridge/inversion circuit |
| CN105680299A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of soft-switching inversion circuit |
| CN105811233A (en) * | 2016-04-20 | 2016-07-27 | 华北电力大学（保定） | Full-bridge inverter circuit laser driving circuit |
| CN109217101A (en) * | 2018-09-29 | 2019-01-15 | 武汉光迅电子技术有限公司 | A kind of laser diode current driving circuit and driving method with maximum current protection |
| CN109451640A (en) * | 2018-10-24 | 2019-03-08 | 无锡市大华激光设备有限公司 | A kind of pulsed xenon lamp driver |
| CN110994356A (en) * | 2019-12-17 | 2020-04-10 | 无锡锐科光纤激光技术有限责任公司 | Constant current power supply circuit for pulse laser |
-
2008
- 2008-12-17 CN CN2008102403143A patent/CN101447638B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680297A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of half-bridge/inversion circuit |
| CN105680299A (en) * | 2016-04-01 | 2016-06-15 | 华北电力大学（保定） | Laser driving circuit of soft-switching inversion circuit |
| CN105680297B (en) * | 2016-04-01 | 2018-08-21 | 华北电力大学（保定） | A kind of half-bridge inverter circuit laser driving circuit |
| CN105680299B (en) * | 2016-04-01 | 2018-08-21 | 华北电力大学（保定） | A kind of soft switching inverting circuit laser driving circuit |
| CN105811233A (en) * | 2016-04-20 | 2016-07-27 | 华北电力大学（保定） | Full-bridge inverter circuit laser driving circuit |
| CN105811233B (en) * | 2016-04-20 | 2019-02-26 | 华北电力大学（保定） | A kind of full bridge inverter laser driving circuit |
| CN109217101A (en) * | 2018-09-29 | 2019-01-15 | 武汉光迅电子技术有限公司 | A kind of laser diode current driving circuit and driving method with maximum current protection |
| CN109217101B (en) * | 2018-09-29 | 2020-03-10 | 武汉光迅电子技术有限公司 | Laser current driving circuit with maximum current protection and driving method |
| CN109451640A (en) * | 2018-10-24 | 2019-03-08 | 无锡市大华激光设备有限公司 | A kind of pulsed xenon lamp driver |
| CN110994356A (en) * | 2019-12-17 | 2020-04-10 | 无锡锐科光纤激光技术有限责任公司 | Constant current power supply circuit for pulse laser |
| CN110994356B (en) * | 2019-12-17 | 2021-04-09 | 无锡锐科光纤激光技术有限责任公司 | Constant current power supply circuit for pulse laser |
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| Publication number | Publication date |
|---|---|
| CN101447638B (en) | 2010-07-07 |
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