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 PDFInfo
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- 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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- 239000003990 capacitor Substances 0.000 claims description 30
- 238000003860 storage Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 abstract description 20
- 238000012937 correction Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000011217 control strategy Methods 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000004088 simulation Methods 0.000 description 6
- 230000002459 sustained effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012432 intermediate storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Classifications
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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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
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
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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| Application Number | Priority Date | Filing Date | Title |
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| CN201810376944.7A CN108599564B (en) | 2018-04-25 | 2018-04-25 | Capacitor voltage discontinuous mode capacitor series connection type staggered parallel Bcuk PFC converter |
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| CN201810376944.7A CN108599564B (en) | 2018-04-25 | 2018-04-25 | Capacitor voltage discontinuous mode capacitor series connection type staggered parallel Bcuk PFC converter |
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Cited By (13)
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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 |
| CN110247546A (en) * | 2019-06-04 | 2019-09-17 | 苏州汇川联合动力系统有限公司 | Non-isolation type biswitch reduction voltage circuit and DC-DC converter |
| 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 |
| US11205958B2 (en) | 2019-09-18 | 2021-12-21 | Delta Electronics, Inc. | Power 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 |
| US11309878B2 (en) | 2019-09-18 | 2022-04-19 | Delta Electronics, Inc. | Power conversion system |
| WO2022105449A1 (en) * | 2020-11-20 | 2022-05-27 | 苏州浪潮智能科技有限公司 | High-dynamic-response switched power supply and server |
| US11532428B2 (en) | 2019-09-18 | 2022-12-20 | Delta Electronics, Inc. | Power conversion system and magnetic component thereof |
| CN115811241A (en) * | 2023-02-08 | 2023-03-17 | 四川大学 | Single-stage bridgeless staggered parallel Boost-LLC AC-DC converter hybrid control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110247546A (en) * | 2019-06-04 | 2019-09-17 | 苏州汇川联合动力系统有限公司 | Non-isolation type biswitch reduction voltage circuit and DC-DC converter |
| 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 |
| 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 |
| US11309878B2 (en) | 2019-09-18 | 2022-04-19 | Delta Electronics, Inc. | Power conversion system |
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| US11205958B2 (en) | 2019-09-18 | 2021-12-21 | Delta Electronics, Inc. | Power 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 |
| US11532428B2 (en) | 2019-09-18 | 2022-12-20 | Delta Electronics, Inc. | Power conversion system and magnetic component thereof |
| 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 |
| WO2022105449A1 (en) * | 2020-11-20 | 2022-05-27 | 苏州浪潮智能科技有限公司 | High-dynamic-response switched power supply and server |
| CN115811241A (en) * | 2023-02-08 | 2023-03-17 | 四川大学 | Single-stage bridgeless staggered parallel Boost-LLC AC-DC converter hybrid control method |
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