CN104600855A - Laser driving power supply and method for realizing power signal composite transmission thereof - Google Patents
Laser driving power supply and method for realizing power signal composite transmission thereof Download PDFInfo
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- CN104600855A CN104600855A CN201410840162.6A CN201410840162A CN104600855A CN 104600855 A CN104600855 A CN 104600855A CN 201410840162 A CN201410840162 A CN 201410840162A CN 104600855 A CN104600855 A CN 104600855A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
Abstract
The invention discloses a laser driving power supply. The laser driving power supply comprises a slow converter, a quick converter, a semiconductor laser, a first average current control unit, a second average current control unit and a voltage regulator, wherein a first output end of the slow converter and a first output end of the quick converter are together connected with a positive electrode of the semiconductor laser; a second output end of the slow converter and a second output end of the quick converter are together connected with a negative electrode of the semiconductor laser; the negative electrode of the semiconductor laser is grounded; the current of the slow converter is controlled by the first average current control unit; the current of the quick converter and the voltage of a high-voltage side energy storage capacitor are controlled by the first average current control unit and the voltage regulator respectively; straight current is output by the slow converter; positive and negative pulse current is output by the quick converter; resultant current obtained by superposing the straight current and the positive and negative pulse current is received by the semiconductor laser. The semiconductor laser can be driven by the laser driving power supply to perform electric energy transmission and communication transmission simultaneously.
Description
Technical field
The present invention relates to a kind of laser drive power and realize the method for power signal multiplexing of transmission, belong to wireless laser delivery of electrical energy and power conversion technology field.
Background technology
Along with electric equipment is day by day universal, there is poor mobility based on the traditional electricity supply mode contacting conduction, the dangerous problem such as reliably.Especially existing in the system of relative movement at power consumption equipment and electric power system, for meeting the more optional equipment of physical contact needs, making troubles to the application of power consumption equipment.And wireless laser delivery of electrical energy has long transmission distance, advantage that directionality is good, is suitable for carrying out non-contact charge to Fast Moving Objects such as unmanned plane, tank, vehicles.
Be illustrated in figure 1 the universal architecture of laser power transmission system, wherein Laser Power Devices are vitals, and the quality of its output current directly has influence on output characteristic and the useful life of semiconductor laser.Therefore in order to meet the strict demand of semiconductor laser to input current, rear class many employings linear circuit of current semiconductor laser drive power controls as the quality of regulon to output current.But under the such large-power occasions of Energy Transfer, the loss of linear circuit is large, efficiency is low, limits the raising of system power grade.
Laser power transmission system, when charging for moving target, to need to obtain in real time in the speed of target, position and photovoltaic panel the information such as spot intensity, the therefore exchange of system also in the information of carrying out while transmitted power.The radio communication system that the many employings of current laser power transmission system are traditional, this traditional approach is not only easily disturbed, also to increase by a batch facility more, improve the complexity of system, reduce the flexibility of system, thus limit the application of this electric energy transmission system in some field, be such as unmanned plane wireless charging afield.
Summary of the invention
Object of the present invention, is provide the laser drive power of a kind of high efficiency, high dynamic characteristic and realize power signal multiplexing of transmission method, semiconductor laser can be driven simultaneously to carry out delivery of electrical energy and communications.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of laser drive power, comprises converter, fast transformation device, semiconductor laser, the first Average Current Control unit, the second Average Current Control unit and voltage regulator at a slow speed; First output of converter and the first output of fast transformation device are connected the positive pole of semiconductor laser jointly at a slow speed, second output of converter and the second output of fast transformation device are connected the negative pole of semiconductor laser jointly at a slow speed, the minus earth of semiconductor laser; The electric current of the first Average Current Control unit controls converter at a slow speed, the second Average Current Control unit and voltage regulator control electric current and the high-pressure side storage capacitor voltage of fast transformation device respectively; Wherein, converter exports straight electric current at a slow speed, and fast transformation device exports positive negative impulse current, and semiconductor laser receives straight electric current and superposes the resultant current obtained with positive negative impulse current.
Further, described converter at a slow speed adopts Buck circuit, comprise power supply, first switching tube, second switch pipe, first inductance, 3rd resistance and filter capacitor, the positive pole of power supply connects one end of the first switching tube, the other end of the first switching tube connects one end of the first inductance and one end of second switch pipe respectively, the other end of the first inductance connects the positive pole of semiconductor laser, the other end of second switch pipe connects the negative pole of the first power supply and one end of the 3rd resistance respectively, the other end of the 3rd resistance connects the negative pole of semiconductor laser, filter capacitor is parallel to the two ends of semiconductor laser,
Described fast transformation device adopts Buck-Boost circuit, comprise first, two, four resistance, storage capacitor, 3rd, four switching tubes and the second inductance, first, in parallel with storage capacitor after two resistant series, one end of storage capacitor connects one end of the 3rd switching tube, the other end of the 3rd switching tube connects one end of the 4th switching tube and one end of the second inductance respectively, the other end of the second inductance connects the positive pole of semiconductor laser, the other end of the 4th switching tube connects the other end of storage capacitor and one end of the 4th resistance respectively, the other end of the 4th resistance connects the negative pole of semiconductor laser.
Further, described first Average Current Control unit comprises the first current regulator, the first PWM controller and the first inverter that connect successively, first current regulator comprises the 5th, six resistance, the first electric capacity, the first operational amplifier and converter current reference power supply at a slow speed, and the first PWM controller comprises the second operational amplifier and the first sawtooth waveforms power supply, one end of described 3rd resistance connects one end of the 5th resistance, the other end of the 5th resistance connects one end of the 6th resistance and the negative input of the first operational amplifier respectively, the other end of the 6th resistance connects one end of the first electric capacity, the other end of the first electric capacity connects the output of the first operational amplifier and the electrode input end of the second operational amplifier respectively, the electrode input end of the first operational amplifier connects ground connection after converter current reference power supply at a slow speed, the negative input of the second operational amplifier connects ground connection after the first sawtooth waveforms power supply, the output of the second operational amplifier connects the other end of described first switching tube and one end of the first inverter respectively, the other end of the first inverter connects the other end of described second switch pipe.
Further, second Average Current Control unit comprises the second current regulator, the second PWM controller, voltage regulator and the second inverter, second current regulator comprises the seven to nine resistance, the second electric capacity, the 3rd operational amplifier and fast transformation device current reference power supply, second PWM controller comprises four-operational amplifier and the second sawtooth waveforms power supply, and voltage regulator comprises the ten to ten two resistance, the 3rd electric capacity, the 5th operational amplifier and capacitance voltage reference power supply; One end of described 4th resistance connects one end of the 7th resistance, the other end of the 7th resistance connects one end of the 8th resistance and the negative input of the 3rd operational amplifier respectively, the other end of the 8th resistance connects one end of the second electric capacity, the other end of the second electric capacity connects the output of the 3rd operational amplifier and the electrode input end of four-operational amplifier respectively, the electrode input end of the 3rd operational amplifier connects one end of the 9th resistance and one end of the 12 resistance respectively, ground connection after the other end connection fast transformation device current reference power supply of the 9th resistance; The negative input of four-operational amplifier connects ground connection after the second sawtooth waveforms power supply, the output of four-operational amplifier connects the described other end of the 3rd switching tube and one end of the second inverter respectively, and the other end of the second inverter connects the other end of described 4th switching tube; First resistance is connected one end of the tenth resistance with the common connection end of the second resistance, the other end of the tenth resistance connects one end of the 11 resistance and the negative input of the 5th operational amplifier respectively, the other end of the 11 resistance connects one end of the 3rd electric capacity, the other end of the 3rd electric capacity connects the other end of the 12 resistance and the output with the 5th operational amplifier respectively, ground connection after the electrode input end connection capacitance voltage reference power supply of the 5th operational amplifier.
The present invention also provides a kind of laser drive power to realize the method for power signal multiplexing of transmission, converter is at a slow speed exported the straight electric current of transmitted power
i 0the positive negative impulse current of signal transmission is exported with fast transformation device
i aC resultant current is obtained after superposition
i lD , and Semiconductor Lasers;
Obtain described straight electric current
i 0method as follows: converter adopts Buck circuit at a slow speed, the sampled current value of converter at a slow speed
i dC-1 the first switching tube drive singal is obtained respectively through the first current regulator and the first PWM controller
q 1 , then add the first inverter and obtain second switch pipe drive singal
q 2 , the first switching tube drive singal
q 1 with second switch pipe drive singal
q 2 be back to convertor controls first switching tube and second switch pipe at a slow speed, obtain straight electric current thus
i 0;
Obtain described positive negative impulse current
i aC method as follows: fast transformation device adopts Buck-Boost circuit, the sampled value of the storage capacitor of fast transformation device
v cdc with the sampled current value of fast transformation device after voltage-regulation
i aC-1 after inputting the second current regulator together, input the second PWM controller, obtain the 3rd switching tube drive singal
q 3 , then add the second inverter and obtain the 4th switching tube drive singal
q 4 , the 3rd switching tube drive singal
q 3 with the 4th switching tube drive singal
q 4 be back to fast transformation device and control the 3rd switching tube and the 4th switching tube, obtain positive negative impulse current thus
i aC .
After adopting such scheme, laser drive power of the present invention will converter and fast transformation device be effectively combined at a slow speed, under continuous and pulse two kinds of mode of operations can be operated in respectively, owing to eliminating linear regulation unit, ensure that the high efficiency of power supply, and in the pulsing mode, also the high dynamic characteristic of power supply can be ensured by appropriate design, and can when not increasing other equipment the communication function of extended wireless laser power transmission system, transmit electric energy and signal of communication simultaneously, for solid foundation is established in the development of later wireless laser electric energy transmission system.
Accompanying drawing explanation
Fig. 1 is the generic structure diagram of laser power transmission system.
Fig. 2 is the coordinate diagram that converter at a slow speed of the present invention transmits straight electric current.
Fig. 3 is the coordinate diagram that fast transformation device of the present invention transmits pulse current.
Fig. 4 is the coordinate diagram that converter at a slow speed of the present invention and fast transformation device transmit resultant current.
Fig. 5 is the topological diagram of laser drive power of the present invention.
Fig. 6 is the current feedback loop figure of the present invention's converter at a slow speed.
Fig. 7 is the current feedback loop figure of fast transformation device of the present invention.
Fig. 8 (a) is the present invention output current of converter and drive waveforms figure of first and second switching tube at a slow speed.
Fig. 8 (b) is the inductive current of fast transformation device of the present invention and the voltage oscillogram of storage capacitor.
Fig. 8 (c) is the present invention fast and at a slow speed converter parallel connection total output current wave figure afterwards.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.
Fig. 2 to Fig. 4 gives laser power transmission system and realizes the main thought that information and energy transmit simultaneously.In radio energy transmission system, the size of semiconductor laser LD transferring energy depends primarily on average power, therefore often adopts constant current drive mode.And LD to be communication work make laser works electric current change by modulation signal by the mode of internal modulation, therefore often adopt pulse current type of drive.So the crucial control be LD Injection Current of transmission while energy and information will be realized.Inject LD after being superposed with the pulse current of transmission of information by the straight electric current of transferring energy, to realize superposing of power and signal for this reason.Simultaneously constant for ensureing the average power of transferring energy, the current average for transmission of information is zero, and the electric current after synthesis can by judging that the size of sample point electric current distinguishes ' 0 ' in binary code and ' 1 '.
Be illustrated in figure 5 a kind of laser drive power, comprise converter, fast transformation device, semiconductor laser, the first Average Current Control unit, the second Average Current Control unit and voltage regulator at a slow speed; First output of converter and the first output of fast transformation device are connected the positive pole of semiconductor laser jointly at a slow speed, second output of converter and the second output of fast transformation device are connected the negative pole of semiconductor laser jointly at a slow speed, the minus earth of semiconductor laser; The electric current of the first Average Current Control unit controls converter at a slow speed, the second Average Current Control unit and voltage regulator control electric current and the high-pressure side storage capacitor voltage of fast transformation device respectively; Wherein, converter exports straight electric current at a slow speed, and fast transformation device exports positive negative impulse current, and when only having converter work at a slow speed, semiconductor laser receives straight electric current, and now laser works is at continuous mode; When working with fast transformation device at a slow speed simultaneously, semiconductor laser receives straight electric current and superposes the pulse combination electric current obtained with positive negative impulse current, and now laser works in the pulsing mode.Owing to not having linear circuit in circuit, power-efficient is improved, and simultaneously by appropriate design fast transformation device, can ensure laser works in the pulsing mode to the requirement of power supply high dynamic characteristic.
Described converter at a slow speed adopts Buck circuit, comprises power supply
v in , the first switching tube
s 1 , second switch pipe
s 2 , the first inductance
l 1 , the 3rd resistance
r 3 and filter capacitor
c 0 , power supply
v in positive pole connect the first switching tube
s 1 one end, the first switching tube
s 1 the other end connect the first inductance respectively
l 1 one end and second switch pipe
s 2 one end, the first inductance
l 1 the other end connect the positive pole of semiconductor laser, second switch pipe
s 2 the other end connect the first power supply respectively
v in negative pole and the 3rd resistance
r 3 one end, the 3rd resistance
r 3 the other end connect the negative pole of semiconductor laser, filter capacitor
c 0 be parallel to the two ends of semiconductor laser.Converter need flow through big current at a slow speed, therefore adopts synchronous rectification mode to raise the efficiency, the first switching tube
s 1 for main switch, second switch pipe
s 2 for continued flow tube,
s 1 with
s 2 complementary conducting.
Described fast transformation device adopts Buck-Boost circuit, comprise first and second, four resistance
r 1 ,
r 2 ,
r 4 , storage capacitor
c dc , third and fourth switching tube
s 3 ,
s 4 with the second inductance
l 2 , first and second resistance
r 1 ,
r 2 connect rear and storage capacitor C
dcparallel connection, storage capacitor C
dcone end connect the 3rd switching tube S
3one end, the 3rd switching tube
s 3 the other end connect the 4th switching tube respectively
s 4 one end and the second inductance
l 2 one end, the second inductance
l 2 the other end connect the positive pole of semiconductor laser, the 4th switching tube
s 4 the other end connect storage capacitor respectively
c dc the other end and the 4th resistance
r 4 one end, the 4th resistance
r 4 the other end connect the negative pole of semiconductor laser.Fast transformation device need flow through bidirectional current, third and fourth switching tube
s 3 ,
s 4 complementary conducting, when it is operated in Boost pattern,
s 4 as master switch,
s 3 play afterflow effect; When it is operated in Buck pattern,
s 3 as master switch,
s 4 play afterflow effect.In addition at fast transformation device high pressure termination storage capacitor
c dc , low-pressure end is in parallel with the output of converter at a slow speed.
As shown in Figure 6, described first Average Current Control unit device comprises the first current regulator, the first PWM controller and the first inverter that connect successively, and the first current regulator comprises the 5th, six resistance
r 5 ,
r 6 , the first electric capacity
c 1 , the first operational amplifier and converter current reference power supply at a slow speed
i dC_ref , the first PWM controller comprises the second operational amplifier and the first sawtooth waveforms power supply
v rAMP1 ; Described 3rd resistance
r 3 one end connect the 5th resistance
r 5 one end, the 5th resistance
r 5 the other end connect the 6th resistance respectively
r 6 one end and the negative input of the first operational amplifier, the 6th resistance
r 6 the other end connect first electric capacity
c 1 one end, the first electric capacity
c 1 the other end connect the output of the first operational amplifier and the electrode input end of the second operational amplifier respectively, the electrode input end of the first operational amplifier connects ground connection after converter current reference power supply at a slow speed, and the negative input of the second operational amplifier connects the first sawtooth waveforms power supply
v rAMP1 rear ground connection, the output of the second operational amplifier connects described first switching tube respectively
s 1 the other end and one end of the first inverter, the other end of the first inverter connects described second switch pipe
s 2 the other end.Sampling resistor
r 3 sample size and the converter current reference power supply at a slow speed of output current
i dC_ref obtain error amount by current regulator, this value is through the first PWM controller and the first sawtooth waveforms
v rAMP1relatively obtain duty ratio, control first and second switching tube
s 1 ,
s 2 switch, thus obtain expect straight electric current
i 0.
As shown in Figure 7, the second Average Current Control unit device comprises the second current regulator, the second PWM controller, voltage regulator and the second inverter, and the second current regulator comprises the seven to nine resistance
r 7 ,
r 8 ,
r 9 , the second electric capacity
c 2 , the 3rd operational amplifier and fast transformation device current reference power supply
i aC_ref , the second PWM controller comprises four-operational amplifier and the second sawtooth waveforms power supply
v rAMP2, voltage regulator comprises the ten to ten two resistance
r 10 ,
r 11 ,
r 12 , the 3rd electric capacity
c 3 , the 5th operational amplifier and capacitance voltage reference power supply
v cdc_ref ; Described 4th resistance
r 4 one end connect the 7th resistance
r 7 one end, the 7th resistance
r 7 the other end connect the 8th resistance respectively
r 8 one end and the negative input of the 3rd operational amplifier, the 8th resistance
r 8 the other end connect the second electric capacity
c 2 one end, the second electric capacity
c 2 the other end connect the output of the 3rd operational amplifier and the electrode input end of four-operational amplifier respectively, the electrode input end of the 3rd operational amplifier connects the 9th resistance respectively
r 9 one end and the 12 resistance
r 12 one end, the 9th resistance
r 9 the other end connect fast transformation device reference power supply
i aC_ref rear ground connection; The negative input of four-operational amplifier connects the second sawtooth waveforms power supply
v rAMP2rear ground connection, the output of four-operational amplifier connects the described other end of the 3rd switching tube and one end of the second inverter respectively, and the other end of the second inverter connects the other end of described 4th switching tube; First resistance
r 1 with the second resistance
r 2 common connection end connect the tenth resistance
r 10 one end, the tenth resistance
r 10 the other end connect the 11 resistance respectively
r 11 one end and the negative input of the 5th operational amplifier, the 11 resistance
r 11 the other end connect the 3rd electric capacity
c 3 one end, the 3rd electric capacity
c 3 the other end connect the 12 resistance respectively
r 12 the other end and and the output of the 5th operational amplifier, the electrode input end of the 5th operational amplifier connects capacitance voltage reference power supply
v cdc_ref rear ground connection.In order to make reversible transducer normally work, storage capacitor voltage should be greater than the voltage at laser input two ends, storage capacitor of therefore sampling
c dc by the adjustment of voltage comparator, voltage ensures that storage capacitor voltage is greater than the voltage at laser input two ends.Under the prerequisite that reversible transducer is working properly, be the reversal of output-response signal, in circuit by sampling capacitance
c dc voltage and capacitance voltage reference power supply
v cdc_ref the voltage error signal obtained is compared by voltage regulator
v pi_out with the modulation signal of representative information
i ref according to the superposition of certain ratio, as the current reference of reversible transducer
i aC_ref .Sampling inductive current
i aC_-1 with fast transformation device current reference
i aC_ref obtain duty ratio by the feedback regulation of the second current regulator and the second PWM controller, control third and fourth switching tube
s 3 ,
s 4 switch.Thus obtain the positive negative impulse current of expectation
i aC .
The present invention also provides a kind of laser drive power to realize the method for power signal multiplexing of transmission, converter is at a slow speed exported the straight electric current of transmitted power
i 0the positive negative impulse current of signal transmission is exported with fast transformation device
i aC resultant current is obtained after superposition
i lD , and Semiconductor Lasers, then by semiconductor laser by the form of light to receiving terminal through-put power and signal simultaneously.
Obtain described straight electric current
i 0method as follows: converter adopts Buck circuit at a slow speed, the sampled current value of converter at a slow speed
i dC-1 the first switching tube drive singal is obtained respectively through the first current regulator and the first PWM controller
q 1 , then add the first inverter and obtain second switch pipe
s 2 drive singal
q 2 , the first switching tube drive singal
q 1 with second switch pipe drive singal
q 2 be back to convertor controls first switching tube at a slow speed
s 1 with second switch pipe
s 2 , obtain straight electric current thus
i 0;
Obtain described positive negative impulse current
i aC method as follows: fast transformation device adopts Buck-Boost circuit, the sampled value of the storage capacitor of fast transformation device
v cdc with the sampled current value of fast transformation device after voltage-regulation
i aC-1
after inputting the second current regulator together, input the second PWM controller, obtain the 3rd switching tube drive singal
q 3, then add the second inverter and obtain the 4th switching tube drive singal
q 4 , the 3rd switching tube drive singal
q 3 with the 4th switching tube drive singal
q 4 be back to fast transformation device and control the 3rd switching tube
s 3 with the 4th switching tube
s 4 , obtain positive negative impulse current thus
i aC .
A specific design example of the present invention is as follows: the input voltage of converter at a slow speed
v dC =7 ~ 12V, output current:
i out =40A, output voltage
v out =3VDC, inductance
l 1 =10uH, first and second switching tube
s 1 ,
s 2 for CSD16415, switching frequency
f s =100KHz; The storage capacitor of fast transformation device
c dc =470uF, third and fourth switching tube S
3, S
4for CSD17527, switching frequency
f s=500KHz, inductance value is
l 2 =3.3uH, pulse current high level respective value is 5A, and low level respective value is-5A.Fig. 8 (a), 8 (b), 8 (c) sets forth main simulation waveform figure.Fig. 8 (a) gives output current and first and second switching tube of converter at a slow speed
s 1 with
s 2 drive waveforms.Fig. 8 (b) gives the inductive current of fast transformation device and the voltage waveform of storage capacitor.Fig. 8 (c) gives fast and converter parallel connection total output current wave afterwards at a slow speed, as can be seen from the figure output current has superposed pulse current, can also tracking signal instruction preferably while through-put power.
Because the function of two Switching Power Supplies in parallel-connection structure is different, therefore can be optimized design respectively according to respective feature when designing, the design of each Switching Power Supply be optimized more flexibly or more, to obtain the advantage that Single switch power supply is difficult to possess.Converter at a slow speed, is used for processing resultant current
i lD in DC quantity, therefore control bandwidth arrange lower; Fast transformation device, is used for processing
i lD in radio-frequency component, therefore bandwidth arrange higher.It is large that filter inductance value as converter at a slow speed can design, and switching frequency obtains less; And that the filter inductance value of fast transformation device can design is less, switching frequency obtains greatly.
The present invention is formed by based on the converter at a slow speed of Buck circuit and the fast transformation device parallel connection of Buck-Boost circuit, and two converters have independently current controlled circuit.This power supply makes converter at a slow speed export the straight electric current for transferring energy by Current Control, make fast transformation device output for the pulse current of transmission of information, two kinds of electric currents combine rear Semiconductor Lasers to realize the optical communication of wireless laser electric energy transmission system at power output end.This power supply is optimized design respectively according to speed two converters feature separately, power source integral efficiency is improved, and has dynamic response faster.Circuit of the present invention can when not increasing other equipment the communication function of extended wireless laser power transmission system, for solid foundation is established in the development of later wireless laser electric energy transmission system.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (5)
1. a laser drive power, is characterized in that: comprise converter, fast transformation device, semiconductor laser, the first Average Current Control unit, the second Average Current Control unit and voltage regulator at a slow speed; First output of converter and the first output of fast transformation device are connected the positive pole of semiconductor laser jointly at a slow speed, second output of converter and the second output of fast transformation device are connected the negative pole of semiconductor laser jointly at a slow speed, the minus earth of semiconductor laser; The electric current of the first Average Current Control unit controls converter at a slow speed, the second Average Current Control unit and voltage regulator control electric current and the high-pressure side storage capacitor voltage of fast transformation device respectively; Wherein, converter exports straight electric current at a slow speed, and fast transformation device exports positive negative impulse current, and semiconductor laser receives straight electric current and superposes the resultant current obtained with positive negative impulse current.
2. a kind of laser drive power as claimed in claim 1, it is characterized in that: described converter at a slow speed adopts Buck circuit, comprise power supply, first switching tube, second switch pipe, first inductance, 3rd resistance and filter capacitor, the positive pole of power supply connects one end of the first switching tube, the other end of the first switching tube connects one end of the first inductance and one end of second switch pipe respectively, the other end of the first inductance connects the positive pole of semiconductor laser, the other end of second switch pipe connects the negative pole of the first power supply and one end of the 3rd resistance respectively, the other end of the 3rd resistance connects the negative pole of semiconductor laser, filter capacitor is parallel to the two ends of semiconductor laser,
Described fast transformation device adopts Buck-Boost circuit, comprise first, two, four resistance, storage capacitor, 3rd, four switching tubes and the second inductance, first, in parallel with storage capacitor after two resistant series, one end of storage capacitor connects one end of the 3rd switching tube, the other end of the 3rd switching tube connects one end of the 4th switching tube and one end of the second inductance respectively, the other end of the second inductance connects the positive pole of semiconductor laser, the other end of the 4th switching tube connects the other end of storage capacitor and one end of the 4th resistance respectively, the other end of the 4th resistance connects the negative pole of semiconductor laser.
3. a kind of laser drive power as claimed in claim 2, it is characterized in that: described first Average Current Control unit comprises the first current regulator, the first PWM controller and the first inverter that connect successively, first current regulator comprises the 5th, six resistance, the first electric capacity, the first operational amplifier and converter current reference power supply at a slow speed, and the first PWM controller comprises the second operational amplifier and the first sawtooth waveforms power supply, one end of described 3rd resistance connects one end of the 5th resistance, the other end of the 5th resistance connects one end of the 6th resistance and the negative input of the first operational amplifier respectively, the other end of the 6th resistance connects one end of the first electric capacity, the other end of the first electric capacity connects the output of the first operational amplifier and the electrode input end of the second operational amplifier respectively, the electrode input end of the first operational amplifier connects ground connection after converter current reference power supply at a slow speed, the negative input of the second operational amplifier connects ground connection after the first sawtooth waveforms power supply, the output of the second operational amplifier connects the other end of described first switching tube and one end of the first inverter respectively, the other end of the first inverter connects the other end of described second switch pipe.
4. a kind of laser drive power as claimed in claim 3, it is characterized in that: the second Average Current Control unit comprises the second current regulator, the second PWM controller, voltage regulator and the second inverter, second current regulator comprises the seven to nine resistance, the second electric capacity, the 3rd operational amplifier and fast transformation device current reference power supply, second PWM controller comprises four-operational amplifier and the second sawtooth waveforms power supply, and voltage regulator comprises the ten to ten two resistance, the 3rd electric capacity, the 5th operational amplifier and capacitance voltage reference power supply; One end of described 4th resistance connects one end of the 7th resistance, the other end of the 7th resistance connects one end of the 8th resistance and the negative input of the 3rd operational amplifier respectively, the other end of the 8th resistance connects one end of the second electric capacity, the other end of the second electric capacity connects the output of the 3rd operational amplifier and the electrode input end of four-operational amplifier respectively, the electrode input end of the 3rd operational amplifier connects one end of the 9th resistance and one end of the 12 resistance respectively, ground connection after the other end connection fast transformation device current reference power supply of the 9th resistance; The negative input of four-operational amplifier connects ground connection after the second sawtooth waveforms power supply, the output of four-operational amplifier connects the described other end of the 3rd switching tube and one end of the second inverter respectively, and the other end of the second inverter connects the other end of described 4th switching tube; First resistance is connected one end of the tenth resistance with the common connection end of the second resistance, the other end of the tenth resistance connects one end of the 11 resistance and the negative input of the 5th operational amplifier respectively, the other end of the 11 resistance connects one end of the 3rd electric capacity, the other end of the 3rd electric capacity connects the other end of the 12 resistance and the output with the 5th operational amplifier respectively, ground connection after the electrode input end connection capacitance voltage reference power supply of the 5th operational amplifier.
5. laser drive power realizes a method for power signal multiplexing of transmission, it is characterized in that: straight electric current converter at a slow speed being exported transmitted power
i 0the positive negative impulse current of signal transmission is exported with fast transformation device
i aC resultant current is obtained after superposition
i lD , and Semiconductor Lasers;
Obtain described straight electric current
i 0method as follows: converter adopts Buck circuit at a slow speed, the sampled current value of converter at a slow speed
i dC-1 the first switching tube drive singal is obtained respectively through the first current regulator and the first PWM controller
q 1 , then add the first inverter and obtain second switch pipe drive singal
q 2 , the first switching tube drive singal
q 1 with second switch pipe drive singal
q 2 be back to convertor controls first switching tube and second switch pipe at a slow speed, obtain straight electric current thus
i 0;
Obtain described positive negative impulse current
i aC method as follows: fast transformation device adopts Buck-Boost circuit, the sampled value of fast transformation device storage capacitor
v cdc with the sampled current value of fast transformation device after voltage-regulation
i aC-1
after inputting the second current regulator together, input the second PWM controller, obtain the 3rd switching tube drive singal
q 3 , then add the second inverter and obtain the 4th switching tube drive singal
q 4 , the 3rd switching tube drive singal
q 3 with the 4th switching tube drive singal
q 4 be back to fast transformation device and control the 3rd switching tube and the 4th switching tube, obtain positive negative impulse current thus
i aC .
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