CN106230303A - A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current - Google Patents
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current Download PDFInfo
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- CN106230303A CN106230303A CN201610786572.6A CN201610786572A CN106230303A CN 106230303 A CN106230303 A CN 106230303A CN 201610786572 A CN201610786572 A CN 201610786572A CN 106230303 A CN106230303 A CN 106230303A
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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
- H02M11/00—Power conversion systems not covered by the preceding groups
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Abstract
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current, drives signal receiving circuit including pulse load repetition, controls ring switching circuit, Voltage loop control circuit, current loop control circuit, exports anti-mistake and rush circuit.When pulse load does not works, use voltage close loop to control power supply, make output voltage set up to rated value.After pulse load is started working, output closed-loop current control is switched to by output voltage closed loop control, pulse load repetition drive signal as the foundation of regulation output size of current, so that output electric current changes with the change of load pulse dutycycle, to maintain the most stable of output voltage automatically.For controlling the output voltage overshooting problem of generation in loop handoff procedure, coordinate the anti-mistake of output accordingly to rush circuit, can prevent state from switching instant output voltage and cross punching damage successive load by output voltage control in the range of limiting.
Description
Technical field
The invention belongs to spacecraft secondary power supply technical field, relate to a kind of power control circuit, particularly relate to low input
Pulsation of current, the pulse power of high power density.
Background technology
Nowadays, phased-array radar is at resource exploration, environmental monitoring, disaster alarm, military surveillance, pattern matching guidance etc.
Field has range of application widely, but the secondary power supply performance indications of load system are carried by its special operating characteristic
Go out more harsh requirement.Phased Array Radar Antenna front each power amplifier components output peak power typically at hundreds of watts,
For the secondary power supply of load system, following stage is capacitive pulse load, the output electric current of secondary power supply during system work
Exist and significantly fluctuate.According to law of conservation of energy, the fluctuation of output will necessarily embody in terms of input power,
Therefore existence is also significantly fluctuated by input current, and bus current fluctuate widely can reduce whole star electric power system can
By property and safety, thus add the design difficulty of whole star electric power system.
According to the operation principle of the pulse power, the fluctuating margin of mains input current is by assembly end capacitance, capacitor
The impact of the factors such as characteristic, capacitor locations, cable resistance.In order to reduce the pulsation of current of secondary power supply, optimize whole star and power
The design of system, reduces design difficulty, under existing Isobarically Control pattern, can only take to increase capacitors count, optimize electricity
Hold battle array layout designs, increase the methods such as cable resistance.But retrained by physical condition, as secondary power supply volume limits with weight indicator
System, the restriction of the factors such as capacitor high frequency characteristics difference, take above method will pay bigger cost, small-sized with current power supply
Change, the mentality of designing of high power density is runed counter to, and these modes are the most extremely limited, not to the effect reducing current fluctuation amplitude
Optimized solution.
Summary of the invention
Present invention solves the technical problem that and be: overcome the deficiencies in the prior art, it is provided that one can reduce spaceborne phased
The control circuit of battle array pulse power input current pulsation, uses interactively control program for load characteristic, by constant voltage/perseverance
The switching of flow control mode, when can effectively eliminate Power supply belt phased array pulse load work, the pulsation of input current, solves
It is easily caused, during existing power supply band low repetition pulse load work, the problem that power supply buses current fluctuation is big.
The technical solution of the present invention is: a kind of control reducing the pulsation of spaceborne phased array pulse power input current
Circuit, drives signal receiving circuit including pulse load repetition, controls ring switching circuit, Voltage loop control circuit, electric current loop control
Circuit processed, export anti-mistake and rush circuit, wherein:
Pulse load repetition drives signal receiving circuit, receives pulse load end pulse repetition and drives signal, produces and arteries and veins
Punching loads repetition and drives signal with frequency homophase, and the pulse signal of constant amplitude, respectively as current loop control circuit and control ring
The input of switching circuit；
Control ring switching circuit: drive the output signal of signal receiving circuit according to pulse load repetition, work as pulse load
When not working so that Voltage loop control circuit works, when pulse load works so that current loop control circuit works；
Voltage loop control circuit: when pulse load does not works, receives the voltage signal of power supply output, and generation enables to
The output voltage of power supply keeps constant control signal and delivers to the power-supply controller of electric of outside；
Current loop control circuit: when pulse load works, receives the current signal of power supply output, produces and enables to electricity
The output electric current in source changes with the pulse duty factor of pulse load and the control signal that changes deliver to the power supply control of outside automatically
Device processed, to maintain stablizing of electric power output voltage；
Export anti-mistake and rush circuit: when electric power output voltage set owing to the switching of control ring switching circuit produces to rush and exceed
During fixed limit value, control outside power-supply controller of electric and stop employing control signal and power supply is controlled, when the output of power supply
When voltage recovers to the limit value set, power supply is controlled by the power-supply controller of electric outside control according to control signal.
Described pulse load repetition drives signal receiving circuit to include resistance R1, resistance R2, optocoupler V1 and benchmark electricity
Potential source Vref, pulse load repetition drives one end of the main track connecting resistance R1 of signal, sends out in another termination optocoupler V1 of resistance R1
The anode of optical diode, the negative electrode of light emitting diode connects pulse load repetition and drives the loop line of signal；Reference voltage source Vref connects
The anode of photosensitive semiconductor pipe in optocoupler V1, the negative electrode of photosensitive semiconductor pipe drives signal receiving circuit as pulse load repetition
Output, simultaneously the negative electrode of photosensitive semiconductor pipe pass through resistance R2 ground connection.
Described control ring switching circuit includes resistance R3, electric capacity C1, voltage comparator U1, resistance R4, resistance R5 and electricity
Resistance R6, pulse load repetition drives the low pass filter filter that the output signal of signal receiving circuit forms through resistance R3, electric capacity C1
Accessing the inverting input of voltage comparator U1 after ripple, reference voltage V ref accesses voltage ratio after resistance R5, resistance R6 dividing potential drop
The relatively in-phase input end of device U1, the outfan of voltage comparator U1 connects reference voltage V ref by pull-up resistor R4, voltage simultaneously
The output of comparator U1 is as the output signal controlling ring switching circuit.
Described Voltage loop control circuit includes operational amplifier U2, resistance R7, resistance R8, resistance R9, resistance R10, electricity
Holding C2, electric capacity C3, electric capacity C4, diode D1, the in-phase input end of operational amplifier U2 connects the output controlling ring switching circuit, electricity
The output voltage in source delivers to the inverting input of operational amplifier U2 after resistance R7, resistance R8 dividing potential drop, and resistance R9, electric capacity C2 go here and there
Being connected in parallel on the two ends of resistance R7 after connection, resistance R10, electric capacity C4 are connected in series in inverting input and the output of operational amplifier U2
Between end, electric capacity C3 is connected in parallel on resistance R10, the two ends of electric capacity C4, the anode of the output terminating diode D1 of operational amplifier U2,
The negative electrode of diode D1 is connected to the power-supply controller of electric of outside.
Described current loop control circuit include operational amplifier U3, resistance R12, resistance R13, resistance R15, electric capacity C6,
Electric capacity C7, diode D2, pulse load repetition drives the output pulse signal of signal receiving circuit to send into operational amplifier U3's
Input in the same direction, the current detection signal of power supply output delivers to the anti-of operational amplifier U3 after resistance R12, resistance R13 dividing potential drop
Phase input；Resistance R15, electric capacity C7 connect, more in parallel with electric capacity C6 after be connected across the outfan of operational amplifier U3 and anti-phase
Between input, the anode of the output terminating diode D2 of operational amplifier U3, the negative electrode of diode D2 is connected to the power supply of outside
Controller.
Described voltage comparator U4, resistance R19, resistance R20, resistance R21, resistance R22, diode D3, diode D4,
Resistance R18, reference voltage V ref accesses the in-phase input end of voltage comparator U4, electric power output voltage warp after resistance R19
Resistance R21, resistance R22 dividing potential drop are followed by the inverting input of voltage comparator U4, and the two ends of resistance R20 connect voltage comparator respectively
The in-phase input end of U4 and the anode of diode D3, the negative electrode of diode D3 connects the outfan of voltage comparator U4, VCC warp of powering
Resistance R18 connects the outfan of voltage comparator U4, and the negative electrode of diode D4 connects the outfan of voltage comparator U4, diode D4's
Anode connects the Enable Pin of external power source controller.
Present invention advantage compared with prior art is:
(1) control circuit of the present invention uses the control mode of constant voltage/constant current self adaptation switching, when pulse load does not works
Time, use voltage close loop to control power supply, make output voltage set up to rated value；After pulse load is started working, by
Output voltage closed loop control switches to output closed-loop current control, after pulse load repetition drives signal be filtered processing,
Foundation as regulation output size of current so that output electric current changes with the change of load pulse dutycycle automatically,
To maintain the most stable of output voltage；The present invention controls changer relative to conventional constant voltage, can meet power supply output work
While rate requires, control inductive current and keep smooth, eliminate the fluctuation of input current, improve the reliability of whole star electric power system
With safety；
(2) control circuit of the present invention uses RC wave filter that pulse load repetition is driven the pulse of signal receiving circuit output
Signal is filtered, and obtains pulse signal meansigma methods, can be automatically according to current duty cycle regulation output electric current under different operating modes
Size, maintains stablizing of output voltage；
(3) control circuit of the present invention exports anti-mistake rush circuit by increasing, and is monitored output voltage, it is to avoid transient state
In handoff procedure, output voltage exceedes limit value affects rear class generation, makes secondary power supply output voltage control in certain limit
In, compensate for the deficiency of current constant control.
Accompanying drawing explanation
Fig. 1 is the integrated circuit schematic diagram of control circuit of the present invention；
Fig. 2 is the schematic diagram that pulse load repetition of the present invention drives signal receiving circuit；
Fig. 3 is the schematic diagram that the present invention controls ring switching circuit；
Fig. 4 is the schematic diagram of Voltage loop control circuit of the present invention；
Fig. 5 is the schematic diagram of current loop control circuit of the present invention；
Fig. 6 is that the present invention exports anti-mistake and rushes the schematic diagram of circuit.
Detailed description of the invention
The control strategy of the present invention is: when pulse load does not works, and uses voltage close loop to control power supply, makes defeated
Go out Voltage Establishment to rated value；After pulse load is started working, output voltage closed loop control switch to output current closed-loop
Control, after pulse load repetition drives signal be filtered processing, as the foundation of regulation output size of current so that
Output electric current changes with the change of load pulse dutycycle, to maintain the most stable of output voltage automatically；Work as pulse load
When quitting work, system is switched back into output voltage closed loop control by output closed-loop current control again, and output voltage is stablized again
Rated value, ready for working of pulse load next time.For controlling the output voltage mistake of generation in loop handoff procedure
Rush problem, coordinate the anti-mistake of corresponding output to rush circuit, can prevent state from switching wink by output voltage control in the range of limiting
Between output voltage cross punching damage successive load.
As it is shown in figure 1, the control circuit of the present invention mainly includes that pulse load repetition drives signal receiving circuit, controls ring
Switching circuit, Voltage loop control circuit, current loop control circuit, export anti-mistake and rush circuit.
As shown in Figure 1 and Figure 2, pulse load repetition drives signal receiving circuit to comprise an optical coupling isolator V1 and resistance
R1, resistance R2.Pulse load repetition drives signal receiving circuit input to receive pulse load end pulse load repetition and drives letter
Number, to isolate through optocoupler V1, utilize reference voltage V ref to obtain with pulse load repetition and drive signal with frequency homophase, amplitude is
The pulse signal of Vref, this signal is respectively as current loop control circuit and the input of control ring switching circuit.When power supply is normal
During work, when pulse load repetition drives signal receiving circuit to receive pulse load repetition driving signal, its output voltage is believed
Number after two-stage RC filter filtering in current loop control circuit, obtain and consolidating that pulse drive signal dutycycle D is directly proportional
Tentering value signal is as the control reference quantity of current loop control circuit；Pulse load repetition simultaneously drives signal receiving circuit (1)
Output voltage signal through controlling in ring switching circuit after RC filter filtering, deliver to control in ring switching circuit voltage ratio relatively
The inverting input of device, as the control reference quantity controlling ring switching circuit.
As shown in Figure 1, Figure 3, control ring switching circuit, pulse load repetition is driven the output signal of signal receiving circuit
The inverting input of voltage comparator U1, reference voltage is accessed after the low pass filter filtering of resistance R3, electric capacity C1 composition
Vref is followed by the in-phase input end of voltage comparator U1 through resistance R5, resistance R6 dividing potential drop, and the outfan of voltage comparator U1 passes through
Pull-up resistor R4 connects reference voltage V ref.When pulse load does not works, pulse load repetition drives signal receiving circuit output
Low level, the anti-phase input terminal voltage of voltage comparator U1 is zero, and in-phase input end voltage is higher than reverse input end voltage, controls
Ring switching circuit output high level, it, as the reference voltage of Voltage loop control circuit, is sent into Voltage loop through resistance R11 and controls electricity
The input in the same direction of the operational amplifier U2 on road, in current loop control circuit, the in-phase input end voltage of operational amplifier U3 is
Zero, therefore current loop control circuit is output as zero, is total in Voltage loop control circuit and current loop control circuit output end two
Under negative electrode diode D1, D2 effect, Voltage loop control circuit works, and power work is in constant voltage mode；When pulse load starts
After work, pulse load repetition drives signal receiving circuit to start to receive repetition and drives signal, and its output voltage becomes and pulse
Repetition drives signal dutyfactor identical, and frequency is identical, the pulse signal of constant amplitude, through current loop control circuit and control ring
After the filtering of switching circuit median filter, make current loop control circuit and control the output voltage upset of switching circuit, voltage simultaneously
The in-phase input end of loop control circuit operational amplifier U2 is low level, the homophase of operational amplifier U3 in current loop control circuit
Input becomes high level, and the output of two control circuits overturns simultaneously, under the effect of outfan common cathode diode, and electric current loop
Control circuit functions to, and power supply switches to current constant control pattern.
As Figure 1 and Figure 4, Voltage loop control circuit, the in-phase input end of operational amplifier U2 is through current-limiting resistance R11
Connecing the output controlling ring switching circuit, the output voltage of power supply delivers to operational amplifier U2's after resistance R7, resistance R8 dividing potential drop
Inverting input, resistance R9, resistance R10, electric capacity C2, electric capacity C3, electric capacity C4 are respectively Voltage loop parameter regulation resistance and regulation
Electric capacity, Voltage loop control circuit primarily serves changer output voltage regulation effect.Wherein in parallel after resistance R9, electric capacity C2 series connection
At the two ends of resistance R7, resistance R10, electric capacity C4 are connected in series between inverting input and the outfan of operational amplifier U2,
Electric capacity C3 is connected in parallel on resistance R10, the two ends of electric capacity C4, the anode of the output terminating diode D1 of operational amplifier U2, diode
D1 is connected with the diode D2 common cathode in current loop control circuit, and the control signal being finally connected to driving pulse generative circuit is defeated
Enter end.
As shown in Figure 1, shown in Figure 5, current loop control circuit, pulse load repetition is driven the output pulse of signal receiving circuit
Signal, after R16, electric capacity C8, the two-stage RC filter circuit of resistance R17, electric capacity C9 composition are filtered, sends into operation amplifier
The input in the same direction of device U3；The current detection signal of outside output current detection circuit output is divided through resistance R12, resistance R13
After pressure and electric capacity C5 filtering, then after current-limiting resistance R14, deliver to the inverting input of operational amplifier U3；Resistance R15, electricity
Hold C6, electric capacity C7 be respectively current ring parameter regulation resistance and regulation electric capacity, wherein resistance R15, electric capacity C7 series connection, then with electric capacity
Being connected across after C6 parallel connection between outfan and the inverting input of operational amplifier U3, the output of operational amplifier U3 terminates two poles
The anode of pipe D2, diode D2 is connected with the diode D1 common cathode in Voltage loop control circuit, is connected to driving pulse and generates electricity
The control signal input on road.
As shown in Fig. 1, Fig. 6, exporting anti-mistake and rush circuit, reference voltage V ref accesses voltage ratio after current-limiting resistance R19
The relatively in-phase input end of device U4, electric power output voltage is followed by the anti-phase defeated of voltage comparator U4 through resistance R21, resistance R22 dividing potential drop
Entering end, electric capacity C10, electric capacity C11 are connected between in-phase input end, inverting input and ground wire respectively as filter capacitor.Resistance
R20 connects the in-phase input end of voltage comparator U4 and the anode of diode D3, and the negative electrode of diode D3 connects voltage comparator U4's
Outfan, power supply VCC connects the outfan of voltage comparator U4 through pull-up resistor R18, and diode D4 anode connects driving pulse
Generative circuit Enable Pin.When power good works, voltage comparator U4 in-phase input end voltage is higher than anti-phase input terminal voltage,
Voltage comparator U4 exports high level, and diode D3 and D4 the most reversely ends, and driving pulse generative circuit normally works.Work as power supply
When output voltage produced punching and exceeded the limit value of setting owing to transient state switches, voltage comparator U4 anti-phase input terminal voltage is high
In in-phase input end voltage, voltage comparator U4 output low level, diode D3, D4 forward conduction, owing to diode D4 turns on
Being pulled low by pulse generation circuit Enable Pin voltage, pulse generation circuit quits work, thus reaches to export the anti-purpose crossing punching.
When electric power output voltage starts to be gradually lowered, when output voltage reduces and is less than the reference voltage set, voltage comparator U4's
In-phase input end voltage is again higher than anti-phase input terminal voltage, and output end voltage overturns again, and power supply restarts work, passes through
Arrange resistance R21, the resistance of resistance R22 can set anti-mistake and rush limit value, and by arranging resistance R19, the resistance of electric capacity R20 can
To set self-recoverage output voltage values.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (6)
1. the control circuit that can reduce the pulsation of spaceborne phased array pulse power input current, it is characterised in that: include pulse
Load repetition drives signal receiving circuit, control ring switching circuit, Voltage loop control circuit, current loop control circuit, output to prevent
Cross and rush circuit, wherein:
Pulse load repetition drives signal receiving circuit, receives pulse load end pulse repetition and drives signal, produces and bears with pulse
Load-carrying frequency drives signal with frequency homophase, the pulse signal of constant amplitude, changes with controlling ring cutting respectively as current loop control circuit
The input of circuit；
Control ring switching circuit: drive the output signal of signal receiving circuit according to pulse load repetition, when pulse load not work
When making so that Voltage loop control circuit works, when pulse load works so that current loop control circuit works；
Voltage loop control circuit: when pulse load does not works, receives the voltage signal of power supply output, produces and enables to power supply
Output voltage keep constant control signal and deliver to outside power-supply controller of electric；
Current loop control circuit: when pulse load works, receives the current signal of power supply output, produces and enables to power supply
Export the control signal that electric current changes automatically the power-supply controller of electric delivering to outside with the pulse duty factor change of pulse load,
To maintain stablizing of electric power output voltage；
Export anti-mistake and rush circuit: when electric power output voltage is owing to the switching controlling ring switching circuit produced punching and exceeded setting
During limit value, the power-supply controller of electric outside control stops using control signal to be controlled power supply, when the output voltage of power supply
When recovering to the limit value set, power supply is controlled by the power-supply controller of electric outside control according to control signal.
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current the most according to claim 1,
It is characterized in that: described pulse load repetition drives signal receiving circuit to include resistance R1, resistance R2, optocoupler V1 and benchmark
Voltage source Vref, pulse load repetition drives one end of the main track connecting resistance R1 of signal, in another termination optocoupler V1 of resistance R1
The anode of light emitting diode, the negative electrode of light emitting diode connects pulse load repetition and drives the loop line of signal；Reference voltage source Vref
Connecing the anode of photosensitive semiconductor pipe in optocoupler V1, the negative electrode of photosensitive semiconductor pipe drives signal to receive electricity as pulse load repetition
The output on road, the negative electrode of photosensitive semiconductor pipe passes through resistance R2 ground connection simultaneously.
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current the most according to claim 1,
It is characterized in that: described control ring switching circuit include resistance R3, electric capacity C1, voltage comparator U1, resistance R4, resistance R5 and
Resistance R6, pulse load repetition drives the low pass filter that the output signal of signal receiving circuit forms through resistance R3, electric capacity C1
Accessing the inverting input of voltage comparator U1 after filtering, reference voltage V ref accesses voltage after resistance R5, resistance R6 dividing potential drop
The in-phase input end of comparator U1, the outfan of voltage comparator U1 connects reference voltage V ref by pull-up resistor R4, simultaneously electricity
The output of pressure comparator U1 is as the output signal controlling ring switching circuit.
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current the most according to claim 1,
It is characterized in that: described Voltage loop control circuit include operational amplifier U2, resistance R7, resistance R8, resistance R9, resistance R10,
Electric capacity C2, electric capacity C3, electric capacity C4, diode D1, the in-phase input end of operational amplifier U2 connects the output controlling ring switching circuit,
The output voltage of power supply delivers to the inverting input of operational amplifier U2, resistance R9, electric capacity C2 after resistance R7, resistance R8 dividing potential drop
Being connected in parallel on the two ends of resistance R7 after series connection, resistance R10, electric capacity C4 are connected in series in the inverting input of operational amplifier U2 with defeated
Going out between end, electric capacity C3 is connected in parallel on resistance R10, the two ends of electric capacity C4, the sun of the output terminating diode D1 of operational amplifier U2
Pole, the negative electrode of diode D1 is connected to the power-supply controller of electric of outside.
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current the most according to claim 1,
It is characterized in that: described current loop control circuit includes operational amplifier U3, resistance R12, resistance R13, resistance R15, electric capacity
C6, electric capacity C7, diode D2, pulse load repetition drives the output pulse signal of signal receiving circuit to send into operational amplifier U3
Input in the same direction, power supply output current detection signal after resistance R12, resistance R13 dividing potential drop, deliver to operational amplifier U3's
Inverting input；Resistance R15, electric capacity C7 connect, more in parallel with electric capacity C6 after be connected across the outfan and instead of operational amplifier U3
Between phase input, the anode of the output terminating diode D2 of operational amplifier U3, the negative electrode of diode D2 is connected to the electricity of outside
Source controller.
A kind of control circuit reducing the pulsation of spaceborne phased array pulse power input current the most according to claim 1,
It is characterized in that: described voltage comparator U4, resistance R19, resistance R20, resistance R21, resistance R22, diode D3, diode
D4, resistance R18, reference voltage V ref accesses the in-phase input end of voltage comparator U4, electric power output voltage after resistance R19
Be followed by the inverting input of voltage comparator U4 through resistance R21, resistance R22 dividing potential drop, the two ends of resistance R20 connect voltage ratio relatively respectively
The in-phase input end of device U4 and the anode of diode D3, the negative electrode of diode D3 connects the outfan of voltage comparator U4, and power VCC
Connect the outfan of voltage comparator U4 through resistance R18, the negative electrode of diode D4 meets the outfan of voltage comparator U4, diode D4
Anode connect the Enable Pin of external power source controller.
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| CN201610786572.6A CN106230303B (en) | 2016-08-30 | 2016-08-30 | A kind of control circuit reducing spaceborne phased array pulse power input current pulsation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112366794A (en) * | 2020-11-30 | 2021-02-12 | 科华恒盛股份有限公司 | Battery charging control device |
| CN113809949A (en) * | 2021-08-23 | 2021-12-17 | 南京理工大学 | Two-stage low-frequency ripple power suppression converter and control method thereof |
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| CN103241844A (en) * | 2013-04-24 | 2013-08-14 | 中山市宝辰机电设备有限公司 | Bipolar pulse scale removal method and scale removal device for implementing method |
| CN103414104A (en) * | 2013-08-20 | 2013-11-27 | 中国科学院半导体研究所 | All-solid-state laser driving power supply device achieving constant voltage / constant current automatic switching |
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| JPH11205236A (en) * | 1998-01-09 | 1999-07-30 | Nec Corp | Optical transmitter |
| CN101887073A (en) * | 2009-05-13 | 2010-11-17 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112366794A (en) * | 2020-11-30 | 2021-02-12 | 科华恒盛股份有限公司 | Battery charging control device |
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| CN113809949B (en) * | 2021-08-23 | 2024-04-12 | 南京理工大学 | Two-stage low-frequency pulse power suppression converter and control method thereof |
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| CN106230303B (en) | 2018-08-07 |
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