CN108599564A - A kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters - Google Patents

A kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters Download PDF

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Publication number
CN108599564A
CN108599564A CN201810376944.7A CN201810376944A CN108599564A CN 108599564 A CN108599564 A CN 108599564A CN 201810376944 A CN201810376944 A CN 201810376944A CN 108599564 A CN108599564 A CN 108599564A
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phase
output
voltage
rectifier diode
capacitance
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CN108599564B (en
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张晨雨
吴云峰
陈章勇
唐远鸿
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/156Conversion 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
    • H02M3/158Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208Arrangements for improving power factor of AC input
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention discloses a kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters and its control thoughts.It is mainly used for needing the application scenario of ultra low voltage output and high power factor correction, especially LED field.The converter intermediate energy storage capacitance works in voltage discontinuous mode, realizes automatic power factor calibration function.Also, the voltage peak of the converter intermediate energy storage capacitance is clamped on input voltage.In addition, the charge and discharge time by effectively adjusting intermediate energy storage capacitance voltage, control effectively to the energy transmitted to load in a switch periods, realizes the superelevation step-down ratio of the converter, and step-down ratio is unrelated with duty ratio.The control strategy of the converter uses frequency conversion Interleaved control thought, and when load change, the frequency of adjust automatically interlaced pulse maintains output voltage stabilization.Circuit provided by the invention has the characteristics such as capacitance voltage clamp (low voltage stress), ultra low voltage output, High Power Factor.

Description

A kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters
Technical field
The invention belongs to electronic circuit fields, more particularly to middle low power, and High Power Factor, ultra low voltage is needed to export Using especially LED power supply technique fields.
Background technology
LED lighting technology is a kind of novel, clean and efficient modern lighting engineering, has energy-saving and environmental protection and uses the longevity The remarkable advantages such as life length.In order to make LED drive circuit reach IEC61000-3-2C class statutory standards to the harmonic pollution of power grid, It is usually necessary to use Active Power Factor Correction Technologies.Single-stage Active Power Factor Correction Converter with control simple, cost compared with Low advantage is extensive in middle low power applications.Its topology is generally divided into isolated form topology and topological two classes of non-isolation type.Every Release topology generally use circuit structure is simple, the simple critical conduction mode of control strategy or discontinuous mode Flyback power Factor correction converter.However that there are due to voltage spikes caused by leakage inductance is serious, inductance is electric for Flyback power factor correcting converters The problems such as input current peak value and root-mean-square valve of stream discontinuous mode are larger, two times of working frequency ripple waves of output voltage are larger.Another party Face, non-isolated property topology generally use discontinuous mode Boost power factor correction units cascade DC/DC units, so And intermediate-bus voltage can be made higher, reduce subordinate DC/DC pressure unit efficiency.Therefore researcher uses Buck, Buck- The unit cascaded DC/DC converters of this voltage reducing power-factor corrections of Boost solve to use discontinuous mode Boost work( The high problem of intermediate-bus voltage caused by rate factor correcting unit.However above-mentioned non-isolation type single-stage active power factor correction Converter is that power factor correction unit is made to work in input current discontinuous mode, to obtain the work(of automatic PFC Energy.Input current discontinuous mode working method will cause the current stress of inverter main circuit power device to increase, and make power body The conduction loss of device increases.
To solve influence of the input current discontinuous mode to converter, correlative study person proposes input current discontinuous mode Antithesis working method capacitance voltage discontinuous mode.Cuk and Buck converters work in capacitance voltage discontinuous mode, can realize Automatic power factor calibration function.Capacitance voltage discontinuous mode solve input current discontinuous mode converter current stress it is big, The low disadvantage of efficiency.However, the converter of capacitance voltage discontinuous mode is worked in,
It is respectively traditional capacitance voltage discontinuous mode Buck PFC and Cuk pfc converters, Fig. 3,4 points as shown in Figure 1, 2 Not Wei traditional capacitance voltage discontinuous mode Buck PFC and Cuk pfc converters capacitance voltage waveform.From Fig. 3,4 it is found that Voltage peak on its storage capacitor determines that voltage peak is big by switching tube turn-off time, input current, storage capacitor value In two times of input voltages, it is therefore necessary to select the power device that stress levels are high, increase circuit cost.
Invention content
Circuit topology and its operating mode provided by the invention overcome existing input current discontinuous mode power factor school Direct transform device input current peak value is big, capacitance voltage discontinuous mode power factor correcting converter intermediate energy storage capacitance voltage is higher Two disadvantages.In addition, it is provided by the invention topology have superelevation step-down ratio, i.e., ultra low voltage output characteristic, and step-down ratio with Duty ratio is unrelated.
The present invention clamps the voltage peak of intermediate energy storage capacitance in input voltage, by effectively adjusting intermediate energy storage capacitance The charge and discharge time of voltage control effectively to the energy transmitted to load in a switch periods, realizes the transformation The superelevation step-down ratio of device, i.e. ultra low voltage export, and step-down ratio is unrelated with duty ratio.Thus technical solution of the present invention is:It is a kind of Serial capacitance voltage clamp bit-type crisscross parallel Buck pfc converters, which includes being sequentially connected in series:Input rectification circuit, LC filter circuits, main circuit, control circuit;The main circuit includes:A phase switching tubes Sa, A diode phases, A phase inductances, B phases open Close pipe Sb, B diode phases, B phase inductances, storage capacitor Ct, output filter capacitor Co;Wherein A phases switching tube SaDrain electrode is filtered with LC The output end of circuit connects, then A phases switching tube SaSource electrode is sequentially connected in series storage capacitor Ct, A phase inductances, the output end of A phase inductances Connect output filter capacitor CoOutput of the anode as main circuit, output filter capacitor CoCathode is grounded, and A diode phase cathodes connect Meet storage capacitor CtWith the total contact of A phase inductances, A diode phase plus earths;B phase switching tubes SbIt connects with B phase inductances, B phases are opened Close pipe SbDrain electrode connection A phase switching tubes SaWith storage capacitor CtTotal contact, B phase inductances connect A phase inductances output end, B phases Diode cathode connects B phase switching tubes SbWith the total contact of B phase inductances, B diode phase plus earths.
Further, the input rectification circuit includes:First rectifier diode, the second rectifier diode, third rectification Diode, the 4th rectifier diode, first rectifier diode are connected with the 4th rectifier diode, the second rectifier diode with The anode of the series connection of third rectifier diode, the 4th rectifier diode and third rectifier diode is grounded after connecing altogether, the first rectification two Output as input rectification circuit after pole pipe and the second rectifier diode cathode connect altogether;First rectifier diode and the 4th rectification Total contact, the second rectifier diode and input of the third rectifier diode conode as input rectification circuit of diode.
Further, the LC filter circuits include:Filter inductance and filter capacitor;The input terminal of the filter inductance connects The output end of input rectification circuit is connect, output end connects the input terminal of main circuit;Described filter capacitor one end connects filter inductance Output end, the other end ground connection.
Further, the sample circuit includes output filter capacitor and load, and sampling capacitance is in parallel with load, after in parallel One end connects the output end of main circuit, other end ground connection.
The present invention works as A phase switching tubes SaConducting, intermediate energy storage capacitance CtBy constant current charge, as intermediate storage capacitor Ct Voltage when rising to input voltage, A phase fly-wheel diode both end voltages are zero, afterflow are connected, by intermediate energy storage capacitance CtIt is negative Pole is grounded, therefore intermediate energy storage capacitance CtVoltage be clamped at the value of input voltage.Due to next operation mode switching tube Sa、SbIt is turned off, intermediate energy storage capacitance CtThere is no a discharge loop, thus its voltage remain input voltage value it is constant.When B phases Switching tube SbIt is connected, at this time intermediate energy storage capacitance CtElectric discharge, discharge loop are A diode phases Da, Ct, B phase switching tubes Sb, B phases Inductance Lb, load.As intermediate storage capacitor CtVoltage fall to zero, B phase sustained diodesbConducting, at this time due to A, B two-phase Diode is both turned on, by intermediate energy storage capacitance CtVoltage clamp zero.In next switch mode, switching tube Sa、SbClose It is disconnected, intermediate energy storage capacitance CtThere is no a charge circuit, therefore to remain zero constant for its voltage.In this way, being achieved that intermediate energy storage electricity Hold CtIt works in capacitance voltage discontinuous mode and voltage peak is clamped on input voltage.In addition, by effectively adjusting intermediate storage It the charge and discharge time of energy capacitance voltage, control effectively to the energy transmitted to load in a switch periods, realizes institute The superelevation step-down ratio of converter is stated, i.e., ultra low voltage exports, and step-down ratio is unrelated with duty ratio.Controller uses constant duty ratio Frequency conversion Interleaved control technology, by output voltage carry out sampling form closed loop, according to output voltage variation accordingly adjust Switching frequency exports Interleaved control pulse, is controlled main circuit switch pipe by driving circuit, maintains output voltage steady It is fixed.
Compared with prior art, the beneficial effects of the invention are as follows:
One, compared with existing discontinuous mode (DICM) pfc converter, continuous input current of the present invention, because This input current peak value and root-mean-square value are smaller, and power device conduction loss is smaller, and converter has at low cost, efficient etc. excellent Point;
Two, compared with existing capacitance voltage discontinuous mode (DCVM) pfc converter, the electricity of intermediate energy storage capacitance of the present invention Voltage crest value is clamped on the value of input voltage, will not increase the voltage stress of main circuit power device, therefore can select pressure resistance The suitable power switch tube of grade, reduces cost.
Three, compared with existing low-voltage output buck converter, the present invention has the duty ratio of bigger, to power switch The switching speed requirements of pipe are relatively low, therefore can save power switch tube and the cost of controller.
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Description of the drawings
Fig. 1 is the circuit structure diagram of traditional capacitance voltage discontinuous mode Buck pfc converters.
Fig. 2 is the circuit structure diagram of traditional capacitance voltage discontinuous mode Cuk pfc converters.
Fig. 3 is the storage capacitor voltage oscillogram of traditional capacitance voltage discontinuous mode Buck pfc converters.
Fig. 4 is the storage capacitor voltage oscillogram of traditional capacitance voltage discontinuous mode Cuk pfc converters.
Fig. 5 is serial capacitance voltage clamp bit-type crisscross parallel Buck pfc converters of the present invention and its circuit of control method Structure chart.
To be of the invention by taking two-phase Buck interlocks as an example, the intermediate energy storage capacitance voltage of concatenation is interrupted for Fig. 6,7,8,9,10,11 Operation mode circuit diagram when pattern corresponds to operation mode 1, operation mode 2, operation mode 3, operation mode 4, work respectively successively Make mode 5, operation mode 6.
The respectively present invention of Figure 12,13 is by taking two-phase Buck interlocks as an example (open loop), in the intermediate energy storage capacitance voltage of concatenation Main time domain power frequency simulation waveform when discontinuous mode and several switch periods simulation waveforms.
Specific implementation mode
Further detailed description is done to the present invention in conjunction with attached drawing below by specific example soldier.
As shown in Fig. 6,7,8,9,10,11, when intermediate storage capacitor voltage discontinuous mode, there are six mode for circuit.
Mode1:T in 1 corresponding diagram 13 of operation mode1Period, when this period starts, switching tube SaConducting, DaShutdown, it is defeated Enter voltage ViIt is that A phases provide energy, V with CCDecline.CtIt is electrically charged, uCtThe linear rise since 0.uDaFrom ViStart linear decline. Work as uCt=ViWhen, A phase sustained diodesaConducting, the mode terminate.
Mode2:T in 2 corresponding diagram 13 of operation mode2Period, when this period starts, A phase sustained diodesaConducting is continuous Stream.This stage C and CtParallel connection, due to C1Much larger than Ct, therefore can ignore and flow through CtElectric current, it is believed that IL1Only charge to C.
Mode3:T in 3 corresponding diagram 13 of operation mode3Period, when this period starts, switching tube SaIt disconnects.Due to Working mould Switching tube S is flowed through in state 2aElectric current iSaIt is 0, therefore switching tube SaZero-current switching.This stage, AB two-phases were by respective afterflow Diode continuousing flow.Due to Sa、SbDisconnect, therefore CtThere is no discharge loop, uctIt remains unchanged, value is still Vi
Mode4:Operation mode:T in 4 corresponding diagrams 134Period, when this period starts, switching tube SbConducting, DbShutdown.Ct Electric discharge is that B phases provide energy, uCtLinear decline, until uCtIt is reduced to 0, sustained diodebConducting, the mode terminate.
Mode5:T in 5 corresponding diagram 13 of operation mode5Period, when this period starts, sustained diodebConducting.This stage A, the equal afterflow of B two-phases, and no electric current flows through switching tube Sb.The duration phase of the duration of this mode and operation mode 1 Together.
Mode6:T in 6 corresponding diagram 13 of operation mode6Period, when this period starts, switching tube SbShutdown.Due to Working mould Switching tube S is flowed through in state 5bElectric current iSbIt is 0, therefore switching tube SbZero-current switching.This stage switch pipe Sa、SbIt is turned off, capacitance CtThere is no charging and discharging circuit, voltage uCtRemain 0.T=t6Moment, switching tube switching tube SaConducting, next switch periods Start.
Simulation analysis result:
Fig. 5 be the invention by taking two-phase Buck serial capacitance crisscross parallels as an example, centre concatenation storage capacitor voltage it is interrupted Pattern, using staggeredly opened loop control embodiment.The respectively power frequency period simulation waveform of Fig. 5 embodiments of Figure 12,13 and switch week Phase simulation waveform, simulation parameter are:Input voltage Vin=220Vac, load resistance RL=1.67 Ω, intermediate energy storage capacitance Ct =24.4nF, inductance La=Lb=226uH, input filter inductance L=800uH, input filter capacitor C=220nF, output capacitance Co=1mF.As shown in Figure 12, the variation of input current tracking input voltage, realizes automatic under continuous input current pattern Power factor emendation function.By Figure 12,13 it is found that intermediate energy storage capacitance works in discontinuous mode, voltage peak is clamped on Input voltage VinValue, do not increase the voltage stress of power device.
To sum up, converter proposed by the invention can make intermediate energy storage capacitance voltage discontinuously and its voltage peak is clamped In the value of input voltage, without increasing additional devices, i.e., it will not be added to and originally can solve among traditional DCVM PFC The higher disadvantage of storage capacitor voltage peak.Also, automatic power factor calibration function, phase are realized under continuous input current pattern Compared with traditional DICM PFC, the peak value and root-mean-square value of input current are reduced, therefore reduces the conduction loss of power device, Improve circuit efficiency.In addition, compared to the high buck converter of tradition, the carried circuit of the present invention can be chosen to be realized compared with big space rate Superelevation step-down ratio reduces the switch performance requirement to power switch tube and controller, has saved circuit cost.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.

Claims (4)

1. a kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters, which includes going here and there successively Connection:Input rectification circuit, LC filter circuits, main circuit, control circuit;The main circuit includes:A phase switching tubes Sa, A phases two Pole pipe, A phase inductances, B phase switching tubes Sb, B diode phases, B phase inductances, storage capacitor Ct, output filter capacitor Co;Wherein A phases are opened Close pipe SaDrain electrode is connect with the output end of LC filter circuits, then A phases switching tube SaSource electrode is sequentially connected in series storage capacitor Ct, A phases electricity Sense, the output end connection output filter capacitor C of A phase inductancesoOutput of the anode as main circuit, output filter capacitor CoCathode connects Ground, A diode phase cathodes connect storage capacitor CtWith the total contact of A phase inductances, A diode phase plus earths;B phase switching tubes Sb It connects with B phase inductances, B phase switching tubes SbDrain electrode connection A phase switching tubes SaWith storage capacitor CtTotal contact, B phase inductances connection The output end of A phase inductances, B diode phase cathodes connect B phase switching tubes SbWith the total contact of B phase inductances, B diode phase anodes connect Ground.
2. a kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters as described in claim 1, It is characterized in that the input rectification circuit includes:First rectifier diode, the second rectifier diode, third rectifier diode, 4th rectifier diode, first rectifier diode are connected with the 4th rectifier diode, and the second rectifier diode and third are whole Flow Diode series, the anode of the 4th rectifier diode and third rectifier diode is grounded after connecing altogether, the first rectifier diode and Output as input rectification circuit after second rectifier diode cathode connects altogether;First rectifier diode and the 4th rectifier diode Total contact, the second rectifier diode and input of the third rectifier diode conode as input rectification circuit.
3. a kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters as described in claim 1, It is characterized in that the LC filter circuits include:Filter inductance and filter capacitor;The input terminal connection input of the filter inductance The output end of rectification circuit, output end connect the input terminal of main circuit;The output of filter capacitor one end connection filter inductance End, other end ground connection.
4. a kind of capacitance voltage discontinuous mode capacitance series formula crisscross parallel Bcuk pfc converters as described in claim 1, It is characterized in that the sample circuit includes output filter capacitor and load, sampling capacitance is in parallel with load, and one end connects after parallel connection Connect the output end of main circuit, other end ground connection.
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CN110212764A (en) * 2019-06-04 2019-09-06 西安交通大学 A kind of non-isolated DC chopper circuit suitable for data center's voltage regulator module
CN110445373A (en) * 2019-08-12 2019-11-12 黄山学院 High power density GaN capacitance series formula interleaved parallel PFC power module
CN110611427A (en) * 2019-09-27 2019-12-24 厦门理工学院 Large-transformation-ratio wide-input voltage reduction circuit and device
CN112003470A (en) * 2020-07-30 2020-11-27 苏州浪潮智能科技有限公司 48V-to-12V power supply for server and power supply conversion method
CN112260537A (en) * 2020-10-14 2021-01-22 哈尔滨工程大学 Direct-current Boost power supply adopting double-tube Buck-Boost circuit
CN112532049A (en) * 2019-09-18 2021-03-19 台达电子工业股份有限公司 Power supply conversion system
US11205963B2 (en) 2019-09-18 2021-12-21 Delta Electronics, Inc. Multiphase buck converter with extended duty cycle range using multiple bootstrap capacitors

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CN105554952A (en) * 2016-01-22 2016-05-04 江苏大学 Interleaving LED drive circuit based on quadratic form Buck and working method thereof
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CN106329930A (en) * 2015-07-06 2017-01-11 台达电子工业股份有限公司 Power converter

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US20150091457A1 (en) * 2013-10-01 2015-04-02 General Electric Company Single-stage ac-dc power converter with flyback pfc and selectable dual output current
US20160276924A1 (en) * 2015-03-17 2016-09-22 Stmicroelectronics S.R.L. Control device for a switching regulator with interleaved converter stages, switching regulator and corresponding control method
CN106329930A (en) * 2015-07-06 2017-01-11 台达电子工业股份有限公司 Power converter
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CN110212764A (en) * 2019-06-04 2019-09-06 西安交通大学 A kind of non-isolated DC chopper circuit suitable for data center's voltage regulator module
CN110212764B (en) * 2019-06-04 2021-04-20 西安交通大学 Non-isolated direct current chopper circuit suitable for data center voltage regulating module
CN110445373B (en) * 2019-08-12 2021-08-06 黄山学院 High-power-density GaN capacitor series connection type interleaving parallel PFC power supply module
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CN112532049A (en) * 2019-09-18 2021-03-19 台达电子工业股份有限公司 Power supply conversion system
CN110611427B (en) * 2019-09-27 2021-03-12 厦门理工学院 Large-transformation-ratio wide-input voltage reduction circuit and device
CN110611427A (en) * 2019-09-27 2019-12-24 厦门理工学院 Large-transformation-ratio wide-input voltage reduction circuit and device
CN112003470A (en) * 2020-07-30 2020-11-27 苏州浪潮智能科技有限公司 48V-to-12V power supply for server and power supply conversion method
CN112260537A (en) * 2020-10-14 2021-01-22 哈尔滨工程大学 Direct-current Boost power supply adopting double-tube Buck-Boost circuit

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