CN102403885A - Multi-frequency division pulse width modulation control circuit for high-power laser power supply - Google Patents
Multi-frequency division pulse width modulation control circuit for high-power laser power supply Download PDFInfo
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- CN102403885A CN102403885A CN2011103659498A CN201110365949A CN102403885A CN 102403885 A CN102403885 A CN 102403885A CN 2011103659498 A CN2011103659498 A CN 2011103659498A CN 201110365949 A CN201110365949 A CN 201110365949A CN 102403885 A CN102403885 A CN 102403885A
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Abstract
The invention discloses a multi-frequency division pulse width modulation control circuit for a high-power laser power supply; the circuit comprises a PWM (Pulse Width Modulation) signal generator for controlling a group of in-parallel power switching tubes to provide power for high-power laser discharge, and at least three frequency division circuits composed of cascaded counters and decoders, wherein the input ends of the counters are connected with the output end of the PWM signal generator; the output ends of the decoders and the output end of the PWM signal generator are simultaneously connected with a group of in-parallel gate circuits; and each output end of the group of in-parallel gate circuits is connected with the control ends of the group of in-parallel power switching tubes respectively and correspondingly to form at least three frequency division PWM control circuits. The multi-frequency division pulse width modulation control circuit not only can reduce working frequency of single power switching tube and improve total working switching frequency of a power supply, power conversion efficiency and stability, but also can reduce temperature of radiating fins and volume of the power supply, and effectively solves the current-sharing problem among the plurality of power switching tubes. Therefore, the control circuit is applicable to the high-power laser power supply more than 12 KW.
Description
Technical field
The present invention relates to Laser Power Devices, particularly relate to a kind of high power laser power supply with many divider pulse width modulation control circuit.
Background technology
In the existing high power laser discharge power supply; Be pulse width modulation (the Pulse Width Modulation that adopts frequency division not or two divided-frequency mostly; Initialism is PWM) control circuit, the single power switch pipe work of preceding a kind of control, the power switch pipe alternation of two parallel connections of a kind of control in back.
Because the power consumption during as the work of the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, initialism is IGBT) of power switch pipe, with operating frequency be that carrier frequency is linear correlation basically.Operating frequency is high more, and the IGBT power consumption is big more, and the actual temperature of device is also just high more, and potential safety hazard highlights more, and therefore, the power output that the operating frequency of IGBT has seriously restricted the high power laser discharge power supply improves.Although can adopt a plurality of IGBT parallel waies, with the electric current that reduces single IGBT reducing temperature,, have the equal flow problem between the parallel connection pipe again.In addition, the switching frequency of high power laser discharge power supply also receives the restriction that the highest characteristic frequency of IGBT has only tens KHz, and the inductance induction reactance of employing is high, exists power volume bigger than normal, and power consumption increases, the defective that conversion efficiency and stability descend.
Summary of the invention
Technical problem to be solved by this invention is the defective that remedies above-mentioned prior art, provides a kind of high power laser power supply with many divider pulse width modulation control circuit.
Technical problem of the present invention solves through following technical scheme.
This high power laser power supply comprises the pulse width modulation (PWM) signal generator with many divider pulse width modulation control circuit, and it is that the high power laser discharge provides power supply that said pwm signal maker is used to control one group of parallelly connected power switch pipe.
This high power laser power supply with the characteristics of many divider pulse width modulation control circuit is:
Be provided with the circuit of forming by the counter and the decoder of cascade of three frequency division at least; The input of said counter is connected with the output of said pwm signal maker; The output of said decoder is connected with one group of parallel gate circuit with the output of said pwm signal maker simultaneously; Each output of said one group of parallel gate circuit connects one to one with the control end of said one group of parallelly connected power switch pipe respectively, forms the pwm control circuit of three frequency division at least.
Technical problem of the present invention solves through following further technical scheme.
Said counter be asynchronous integrated counter with integrated counter synchronously in a kind of.
Said counter is the arbitrary carry system counter.
Said counter is the tetrad counter.
Be provided with adopt feedback zero clearing method or door, door combinational circuit; One input said or door is connected with the output of said pwm signal maker; Another input is connected with the output of said door combinational circuit; Output said or door is connected with the zero clearing control end of said counter, and the input of said door combinational circuit is connected with the output of said counter.
Said decoder is a kind of in two-four line decoders, three-eight line decoders and four-16 line decoders.
Technical problem of the present invention solves through following further again technical scheme.
The power switch pipe of said one group of parallel connection is the power switch pipe of one group of parallel connection of at least three power switch pipe parallel connections.
The power switch pipe of said one group of parallel connection is the power switch pipe that is connected one group of parallel connection in buck converter BUCK power supply architecture and the booster converter BOOST power supply architecture.
Said power switch pipe is IGBT.
The beneficial effect of the present invention and prior art contrast is:
At least three power switch pipe periodic duties that the present invention adopts the pwm signal of three frequency division at least to control the size identical simultaneously; Not only can reduce the operating frequency of single power switch pipe; Improve total work switching frequency, power supply conversion efficiency and the stability of power supply, can also reduce heatsink temperature, reduce power volume; Effectively solve the equal flow problem between a plurality of power switch pipe parallel connections, can be used for the above high power laser power supply of 12KW.
Description of drawings
Fig. 1 is the circuit composition diagram of the specific embodiment of the invention;
Fig. 2 is the output waveform figure of pwm signal maker, decoder and the gate circuit of Fig. 1 circuit.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of like Fig. 1, the high-power yag crystal YAG Laser Power Devices shown in 2 with four divider pulse width modulation control circuits, comprise that adopting model is the pwm signal maker U6 of TL494 chip.It is that high-power YAG laser discharge provides power supply that pwm signal maker U6 is used to control one group of parallelly connected power switch pipe Q1, power switch pipe Q2, power switch pipe Q3, power switch pipe Q4.It is the IGBT of MDI550-12A4 that power switch pipe Q1, power switch pipe Q2, power switch pipe Q3, power switch pipe Q4 adopt model.
The tetrad counter U3 that is provided with model by cascade and is 74HC93 is the divide by four circuit that three-eight line decoder U1 of 74HC138 form with adopting model.The input of tetrad counter U3 is connected with the output of pwm signal maker U6; The output of three-eight line decoder U1 is connected with one group of parallel gate circuit U5A, gate circuit U5B, gate circuit U5C, gate circuit U5D with the output of pwm signal maker U6 simultaneously; The control end of parallelly connected with the one group respectively power switch pipe Q1 of each output of one group of parallel gate circuit U5A, gate circuit U5B, gate circuit U5C, gate circuit U5D, power switch pipe Q2, power switch pipe Q3, power switch pipe Q4 connects one to one, and forms the pwm control circuit of four frequency divisions.It is four or two inputs and door chip of 74HC08 that gate circuit U5A, gate circuit U5B, gate circuit U5C, gate circuit U5D adopt model.
Be provided with four or two inputs or door U4 that the model that adopts feedback zero clearing method is CD4071, and by the model combinational circuit U2 that to be the eight input NAND gate chips of 74HC30 form with the not gate chip that model is 74HC14.The input of four or two inputs or door U4 is connected with the output of pwm signal maker U6; Another input is connected with the output of door combinational circuit U2; The output of four or two inputs or door U4 is connected with the zero clearing control end of tetrad counter U3, and the input of door combinational circuit U2 is connected with the output of tetrad counter U3.
The course of work of this embodiment is following:
The buck converter BUCK discharge module that the electric energy of the pumping lamp Y1 of YAG laser bar Laserl is made up of power switch pipe Q1, power switch pipe Q2, power switch pipe Q3, power switch pipe Q4, inductance L 1 and the sustained diode 1 of one group of parallel connection is supplied with, and is parallel with storage capacitor C1 between power positive end V+ and the power supply negative terminal V-.
Model is that the detected laser power signal of photoelectric conversion tube M1 of S8745-01 feeds back to pwm signal maker U6, the reference signal that laser power feedback signal and user is provided with by the pwm signal maker U6 generation pwm signal of comparing.Top waveform a among Fig. 2 is the pwm signal waveform of pwm signal maker U6 output; Middle waveform b is 1,2,3,4 tunnel signal waveforms of three-eight line decoder U1 output; Below waveform c be the signal waveform of one group of parallel gate circuit U5A, gate circuit U5B, gate circuit U5C, the gate circuit U5D output power switch pipe Q1 that drives the tetrad parallel connection, power switch pipe Q2, power switch pipe Q3, power switch pipe Q4.
The pwm signal that pwm signal maker U6 generates exports A point → tetrad counter U3 completion binary number code to and exports the binary number code minute two-way that B point → B is ordered to:
One the tunnel exports when the binary number code count down to the quaternary output low level to feeds back to a combinational circuit U2 and synthesizes reset signal to tetrad counter U3 zero clearing through four or two inputs or door with the sets of signals that A is ordered again; Tetrad counter U3 makes four one replication cycle counts outputs of tetrad counter U3 from zero counting when opening again.
Another road exports three-eight line decoder U1 → three-eight line decoder U1 to and divides four the tunnel to export gate circuit U5A, gate circuit U5B, gate circuit U5C, gate circuit U5D to and carry out gate output → pwm signal that pwm signal maker U6 is generated with A point waveform again and convert the pwm signal of four frequency divisions output to.
Finally drive power switch pipe Q1, power switch pipe Q2, power switch pipe Q3, the power switch pipe Q4 of tetrad parallel connection through one group of parallel driver for isolating with the pwm signal of four frequency divisions output; Realize the control of four frequency divisions; To reduce the operating frequency of single power switch pipe, improve operating switch frequency, power supply conversion efficiency and the stability of power supply, can also reduce heatsink temperature; Reduce power volume, effectively solve the equal flow problem between the parallel connection pipe.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.Those of ordinary skill for technical field under the present invention; Under the prerequisite that does not break away from the present invention's design, make some alternative or obvious modification that are equal to; And performance or purposes are identical, all should be regarded as belonging to the scope of patent protection that the present invention is confirmed by claims of being submitted to.
Claims (9)
1. a high power laser power supply is with many divider pulse width modulation control circuit; Comprise the pulse width modulation (PWM) signal generator; It is that the high power laser discharge provides power supply that said pwm signal maker is used to control one group of parallelly connected power switch pipe, it is characterized in that:
Be provided with the circuit of forming by the counter and the decoder of cascade of three frequency division at least; The input of said counter is connected with the output of said pwm signal maker; The output of said decoder is connected with one group of parallel gate circuit with the output of said pwm signal maker simultaneously; Each output of said one group of parallel gate circuit connects one to one with the control end of said one group of parallelly connected power switch pipe respectively, forms the pwm control circuit of three frequency division at least.
2. high power laser power supply as claimed in claim 1 is characterized in that with many divider pulse width modulation control circuit:
Said counter be asynchronous integrated counter with integrated counter synchronously in a kind of.
3. according to claim 1 or claim 2 high power laser power supply is characterized in that with many divider pulse width modulation control circuit:
Said counter is the arbitrary carry system counter.
4. high power laser power supply as claimed in claim 3 is characterized in that with many divider pulse width modulation control circuit:
Said counter is the tetrad counter.
5. high power laser power supply as claimed in claim 4 is characterized in that with many divider pulse width modulation control circuit:
Be provided with adopt feedback zero clearing method or door, door combinational circuit; One input said or door is connected with the output of said pwm signal maker; Another input is connected with the output of said door combinational circuit; Output said or door is connected with the zero clearing control end of said counter, and the input of said door combinational circuit is connected with the output of said counter.
6. high power laser power supply as claimed in claim 5 is characterized in that with many divider pulse width modulation control circuit:
Said decoder is a kind of in two-four line decoders, three-eight line decoders and four-16 line decoders.
7. high power laser power supply as claimed in claim 6 is characterized in that with many divider pulse width modulation control circuit:
The power switch pipe of said one group of parallel connection is the power switch pipe of one group of parallel connection of at least three power switch pipe parallel connections.
8. high power laser power supply as claimed in claim 7 is characterized in that with many divider pulse width modulation control circuit:
The power switch pipe of said one group of parallel connection is the power switch pipe that is connected one group of parallel connection in buck converter BUCK power supply architecture and the booster converter BOOST power supply architecture.
9. high power laser power supply as claimed in claim 8 is characterized in that with many divider pulse width modulation control circuit:
Said power switch pipe is an insulated gate bipolar transistor IGBT.
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| CN2011103659498A CN102403885A (en) | 2011-11-17 | 2011-11-17 | Multi-frequency division pulse width modulation control circuit for high-power laser power supply |
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| CN2011103659498A CN102403885A (en) | 2011-11-17 | 2011-11-17 | Multi-frequency division pulse width modulation control circuit for high-power laser power supply |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178741A (en) * | 2013-03-04 | 2013-06-26 | 东南大学 | Interleaved parallel switch full-bridge inverter and interleaved parallel control method |
| CN104716821A (en) * | 2013-12-12 | 2015-06-17 | 杭州先途电子有限公司 | Air conditioner controller, power conversion circuit of air conditioner controller, and power factor correction circuit |
| CN104811028A (en) * | 2014-01-23 | 2015-07-29 | 广东美的制冷设备有限公司 | Power factor correction circuit |
| CN105896982A (en) * | 2016-05-12 | 2016-08-24 | 哈尔滨工业大学 | BUCK frequency doubling circuit |
| CN106208745A (en) * | 2016-08-08 | 2016-12-07 | 上海交通大学 | CUT output current ripple frequency multiplication and modulating system |
| CN108111005A (en) * | 2017-12-21 | 2018-06-01 | 深圳信息职业技术学院 | The driving circuit and method of power device |
| CN109842308A (en) * | 2017-11-29 | 2019-06-04 | 佛山市顺德区美的电热电器制造有限公司 | The control device and method of electromagnetism cooking pot and its power switch tube |
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| CN101944853A (en) * | 2010-03-19 | 2011-01-12 | 郁百超 | Green power inverter |
| CN102075069A (en) * | 2011-01-21 | 2011-05-25 | 深圳飞能能源有限公司 | Drive control system and method for parallel insulated gate bipolar transistors (IGBT) |
| CN202384985U (en) * | 2011-11-17 | 2012-08-15 | 深圳市联赢激光股份有限公司 | Multi-division frequency pulse-width modulation control circuit for large-power laser power supply |
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| US4290101A (en) * | 1977-12-29 | 1981-09-15 | Burroughs Corporation | N Phase digital inverter |
| US5682303A (en) * | 1993-12-08 | 1997-10-28 | International Powersystems | Reconfigurable thin-profile switched-mode power conversion array and method of operating the same |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178741A (en) * | 2013-03-04 | 2013-06-26 | 东南大学 | Interleaved parallel switch full-bridge inverter and interleaved parallel control method |
| CN104716821A (en) * | 2013-12-12 | 2015-06-17 | 杭州先途电子有限公司 | Air conditioner controller, power conversion circuit of air conditioner controller, and power factor correction circuit |
| CN104811028A (en) * | 2014-01-23 | 2015-07-29 | 广东美的制冷设备有限公司 | Power factor correction circuit |
| CN105896982A (en) * | 2016-05-12 | 2016-08-24 | 哈尔滨工业大学 | BUCK frequency doubling circuit |
| CN106208745A (en) * | 2016-08-08 | 2016-12-07 | 上海交通大学 | CUT output current ripple frequency multiplication and modulating system |
| CN106208745B (en) * | 2016-08-08 | 2019-10-29 | 上海交通大学 | Plasma cutting machine output current ripple frequency multiplication and modulating system |
| CN109842308A (en) * | 2017-11-29 | 2019-06-04 | 佛山市顺德区美的电热电器制造有限公司 | The control device and method of electromagnetism cooking pot and its power switch tube |
| CN109842308B (en) * | 2017-11-29 | 2021-03-19 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic cooker and control device and method of power switch tube of electromagnetic cooker |
| CN108111005A (en) * | 2017-12-21 | 2018-06-01 | 深圳信息职业技术学院 | The driving circuit and method of power device |
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Inventor after: Zhang Taifeng Inventor after: Niu Zengqiang Inventor before: Zhang Taifeng |
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Application publication date: 20120404 |