WO2019019297A1 - Dispositif ups à courant continu, système et procédé de commande - Google Patents

Dispositif ups à courant continu, système et procédé de commande Download PDF

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Publication number
WO2019019297A1
WO2019019297A1 PCT/CN2017/101380 CN2017101380W WO2019019297A1 WO 2019019297 A1 WO2019019297 A1 WO 2019019297A1 CN 2017101380 W CN2017101380 W CN 2017101380W WO 2019019297 A1 WO2019019297 A1 WO 2019019297A1
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WO
WIPO (PCT)
Prior art keywords
circuit
output
power supply
switch tube
input
Prior art date
Application number
PCT/CN2017/101380
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English (en)
Chinese (zh)
Inventor
方耿
Original Assignee
深圳市泰昂能源科技股份有限公司
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Publication of WO2019019297A1 publication Critical patent/WO2019019297A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00711—Regulation of charging or discharging current or voltage with introduction of pulses during the charging process
    • 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

Definitions

  • the present invention relates to the field of power electronics, and in particular, to a DC UPS power supply device, system, and control method.
  • the Uninterruptible Power System is a system device that connects a battery such as lead-acid maintenance-free to a host computer and converts DC power into a commercial power through a module circuit such as a host inverter.
  • DC UPS is widely used in DC uninterruptible power supply.
  • the device When AC power is supplied, the device provides a stable DC output for the load and charges the battery. When the utility power fails, it can automatically discharge through the battery and continuously output DC power.
  • the conventional circuit design of the DC UPS is: the AC input is filtered by the filter and the power factor correction unit outputs high voltage DC. If the battery voltage is low, the busbar and the battery need to be lifted and connected and electrically isolated by the transformer. The input generally needs to be DC output. Electrical isolation, so the main converter also needs to adopt high-frequency isolation conversion. If the charge-discharge converter cannot achieve bidirectional control, two independent high-frequency isolated converters are needed to realize the charging and discharging functions.
  • the conventional device of the entire DC UPS requires two to three high-frequency inverters, and the two-stage isolation and conversion to the output are required during discharge, so that there are many circuit converters, which makes the logic timing control complicated, resulting in a decrease in discharge efficiency.
  • the object of the present invention is to provide a DC UPS power supply device, system and control method for solving the conventional device of the DC UPS existing in the prior art, which requires 2 to 3 high frequency converters, and needs to pass through during discharge.
  • the two-stage isolation transforms to the output so there are many circuit converters, which makes the logic timing control complicated, resulting in a technical problem of reduced discharge efficiency.
  • an embodiment of the present invention provides a DC UPS power supply device, including: an AC input circuit, a DC output circuit, and a battery charging and discharging circuit;
  • the AC input circuit is coupled to the DC output circuit and the battery charging and discharging circuit through a transformer;
  • the AC input circuit transmits energy to the DC output circuit and the battery charging and discharging circuit through the transformer when the AC input circuit has a current input;
  • the battery charging and discharging circuit transfers energy to the DC output circuit through the transformer when the AC input circuit has no current input.
  • the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the transformer is a three-terminal isolated transformer, and the AC input circuit, the DC output circuit, and the battery charging and discharging circuit pass The three-terminal isolation transformer is coupledly coupled.
  • an embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the AC input circuit includes a power factor correction circuit, a DC bus, a DC side capacitor, and a resonant converter circuit;
  • the AC input circuit When the AC input circuit has a current input, the AC power is converted into DC power by the power factor correction circuit, and the DC power is input to the DC side capacitor and the resonance conversion circuit via the DC bus.
  • the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the resonant conversion circuit includes: a first switch tube, a second switch tube, a relay, a resonant inductor, a resonant capacitor, and Winding
  • the relay When the AC input circuit has a current input, the relay is closed, the first switch tube and the second switch tube are turned on, and the resonant inductor and the resonant capacitor are connected in series with the winding.
  • the winding is the primary winding of the transformer.
  • an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the relay is a normally open relay.
  • the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the first switch tube and the second switch tube are complementarily turned on to form a half bridge structure;
  • the bridge structure is connected in parallel with the DC side capacitor, and the series circuit of the resonant inductor, the resonant capacitor and the winding is connected in parallel with the second switch tube.
  • the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein, when the AC input circuit has no current input, the relay, the first switch tube, and the first The two switches are turned off, and the windings are in an open state.
  • an embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein an output end of the DC output circuit is connected to a first controller, where the first controller is configured to be The output voltage of the DC output circuit controls the operating frequency of the first switching transistor and the second switching transistor.
  • an embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the DC output circuit includes a third switch tube, a fourth switch tube, a first metal film capacitor, and a second metal A secondary full-wave synchronous rectification circuit in which a membrane capacitor and a first output capacitor are connected.
  • the second controller is connected between the DC output circuit and the bidirectional buck-boost circuit, and is configured as a root Controlling the bidirectional buck-boost circuit to operate in a boost mode or a buck mode according to an output voltage of the DC output circuit;
  • the fifth switch tube and the sixth switch tube are connected between the transformer and the bidirectional buck-boost circuit, and when the bi-directional buck-boost circuit operates in a buck mode, the fifth switch tube and the The six switch tubes constitute a secondary synchronous rectification circuit.
  • the fifth switch tube and the sixth switch tube When the bidirectional buck-boost circuit operates in the boost mode, the fifth switch tube and the sixth switch tube constitute a primary push-pull circuit.
  • the embodiment of the present invention provides the eleventh possible implementation manner of the first aspect, wherein the bidirectional buck-boost circuit comprises a second output capacitor, a third output capacitor, a seventh switch, and a An eighth switch tube and an energy storage inductor; the seventh switch tube and the eighth switch tube are connected in series and complementary to each other, and the series circuit formed by the seventh switch tube and the eighth switch tube is connected in parallel with the second output capacitor. a series circuit comprising the energy storage inductor and the third output capacitor is connected in parallel with the eighth switch tube;
  • the second controller is connected to the seventh switch tube and the eighth switch tube, and the second controller is configured to output the corresponding square wave signal according to the output voltage of the DC output circuit to drive the seventh switch tube and
  • the eighth switch tube operates the bidirectional buck-boost circuit in a buck mode or a boost mode.
  • the rectifier circuit is a secondary rectifier circuit, and the bidirectional buck-boost circuit is converted into a step-down conversion circuit, and the battery charging and discharging circuit charges the battery.
  • the embodiment of the present invention provides a thirteenth possible implementation manner of the first aspect, wherein, when the AC input circuit has no current input, the bidirectional buck-boost circuit is a boost converter circuit.
  • the rectifier circuit is a primary push-pull circuit that transmits power to the DC output circuit.
  • the embodiment of the present invention provides the fourteenth possible implementation manner of the first aspect, wherein the rectifying circuit comprises: a full wave synchronous rectification circuit or a bridge rectification circuit.
  • the embodiment of the present invention provides the fifteenth possible implementation manner of the first aspect, wherein the DC output circuit comprises: a secondary voltage doubler synchronous rectifier circuit, a secondary bridge rectifier circuit, and a secondary One of the asynchronous rectification circuits.
  • the AC power source is configured to input AC power to an AC input circuit in the DC UPS power supply device;
  • the DC output circuit in the DC UPS power supply device is configured to supply power to the load
  • the battery charging and discharging circuit in the DC UPS power supply device is configured to charge the rechargeable battery.
  • the embodiment of the present invention further provides a control method, which controls the straightness provided by the embodiment of the present invention.
  • Flowing a UPS power supply device the method comprising:
  • the circuit operates in boost mode when there is no current input.
  • the DC UPS power supply device comprises a battery charging and discharging circuit, an AC input circuit and a DC output circuit, The AC input circuit is coupled to the DC output circuit and the battery charging and discharging circuit through a transformer.
  • the AC input circuit When the AC input circuit has a current input, the AC input circuit transmits energy to the DC output circuit and the battery charging and discharging circuit through the transformer, but the AC input circuit does not have
  • the battery charging and discharging circuit transmits energy to the DC output circuit through the transformer, through a high-frequency isolation transformer in the DC UPS device, using the power electronic bidirectional conversion and control technology, and simultaneously realizing the AC input and the battery and the output, the battery
  • the energy transfer between the output and the output is realized by a high-frequency transformer, so that the conventional device of the DC UPS existing in the prior art needs 2 to 3 high-frequency inverters, and needs to be discharged. After two levels of isolation to the output, so Road more inverter, and the logic timing control complex, technical issues resulting in reduced discharge efficiency.
  • FIG. 1 is a schematic structural diagram of a DC UPS power supply device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of an AC input circuit in a DC UPS power supply device according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a battery charging and discharging circuit in a DC UPS power supply device according to an embodiment of the present invention
  • FIG. 4 is another schematic structural diagram of a DC UPS power supply device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a DC UPS power supply system according to an embodiment of the present invention.
  • Icon 1-DC UPS power supply unit; 11-AC input circuit; 12-DC output circuit; 13-battery charging and discharging circuit; 111-power factor correction circuit; 112-DC bus; 113-DC side capacitor; 114-resonance conversion Circuit; 131-bidirectional buck-boost circuit; 132-rectifier circuit; 2-DC UPS power system; 21-rechargeable battery; 22-load; 23-AC power supply.
  • the DC UPS power supply device 1 includes an AC input circuit 11 , a DC output circuit 12 , and a battery charging and discharging circuit 13 .
  • the AC input circuit 11 is coupled to the DC output circuit 12 and the battery charging and discharging circuit 13 through a transformer: when the AC input circuit 11 has a current input, the AC input circuit 11 passes through the transformer to the DC output circuit 12 and the battery charging and discharging circuit. 13 transmits energy; when the AC input circuit 11 has no current input, the battery charging and discharging circuit 13 transfers energy to the DC output circuit 12 through the transformer.
  • the AC input circuit 11 may include a power factor correction circuit 111, a DC bus 112, a DC side capacitor 113, and a resonance conversion circuit 114.
  • the AC input circuit 11 has a current input, the AC power is converted into DC power by the power factor correction circuit 111, and the DC power is input to the DC side capacitor 113 and the resonance conversion circuit 114 via the DC bus 112.
  • the resonant converter circuit 114 may include: a first switch transistor Q1, a second switch transistor Q2, a relay K1, a resonant inductor Lr, a resonant capacitor Cr, and a winding Np: a current is present in the AC input circuit 11.
  • the relay K1 When inputting, the relay K1 is closed, the first switch tube Q1 and the second switch tube Q2 are turned on in turn, the resonant inductor Lr, the resonant capacitor Cr is connected in series with the winding Np, the winding Np is the primary winding of the transformer; there is no current input in the AC input circuit 11
  • the relay K1 When the relay K1, the first switching transistor Q1 and the second switching transistor Q2 are turned off, the winding Np is in an open state.
  • the first switch tube Q1 and the second switch tube Q2 are complementarily turned on to form a half bridge structure.
  • the half bridge structure is connected in parallel with the DC side capacitor 113.
  • the resonant inductor Lr, the resonant capacitor Cr and the winding Np are connected in series to form a series circuit, and the series circuit is connected in parallel with the second switching transistor Q2.
  • a half bridge resonant converter circuit is constructed.
  • the AC power input active power factor correction (APFC) circuit outputs high voltage direct current, and the high voltage direct current is about 380V. Therefore, the AC power is output to the DC bus Bus and the DC side capacitor C1 via the APFC circuit. Since the relay K1 is a normally open type relay, when there is a current input, the relay K1 is closed, and the switching tube Q1, the switching tube Q2, the resonant inductor Lr, the resonant capacitor Cr, and the transformer primary winding Np constitute a half bridge resonance (one inductor) In series with two capacitors, referred to as LLC resonant) conversion circuit.
  • LLC resonant half bridge resonance
  • the transformer secondary winding Ns2, the transformer secondary winding Ns sixth, the fifth switching transistor Q5, the switching transistor Q6, and the second output capacitor Co2 constitute a secondary full-wave synchronous rectification circuit.
  • the second output capacitor Co2, the seventh switch transistor Q7, the eighth switch transistor Q8, the storage inductor Lr, and the third output capacitor Co3 form a bidirectional buck/boost circuit, and the third output capacitor Co3 outputs a battery charge.
  • the second output capacitor Co2 and the third output capacitor Co3 are both electrolytic capacitors.
  • Co2 is transformed into a battery by a buck conversion circuit for constant current constant voltage Bat charging.
  • the components included in the AC input circuit 11 and their connection relationships are similar to those in the first embodiment, and are not described herein again.
  • the DC UPS power supply device may further include a first controller, where the first controller is connected to an output end of the DC output circuit 11.
  • the first controller is configured to control an operating frequency of the first switching transistor Q1 and the second switching transistor according to an output voltage Vo of the DC output circuit 11 to stabilize the output voltage Vo of the DC output circuit 11 Pressure.
  • the DC UPS power supply device may further include a second controller, where the battery charging and discharging circuit 13 includes a bidirectional buck-boost circuit, a fifth switch tube Q5, and a sixth switch tube Q6.
  • the second controller is connected between the DC output circuit 12 and the bidirectional buck-boost circuit, and configured to control the bidirectional buck-boost circuit to operate according to the output voltage Vo of the DC output circuit 12 Boost mode or buck mode.
  • the seventh switch tube Q7 and the eighth switch tube Q8 are respectively connected to the second controller, and the second controller is configured to output a corresponding square according to the output voltage Vo of the DC output circuit 12
  • the wave signal is configured to drive the seventh switch tube Q7 and the eighth switch tube Q8 to operate the bidirectional step-up and step-down circuit in a buck mode or a boost mode.
  • the embodiment of the invention further provides a control method, which is configured to control the DC UPS power supply device provided by the embodiment of the invention.
  • the method includes the following steps:
  • the AC input circuit 11 operates in the boost mode when there is no current input.
  • the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be a fixed connection or a detachable connection, unless otherwise explicitly defined and defined. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • installation may be a fixed connection or a detachable connection, unless otherwise explicitly defined and defined.
  • connected integrally may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the DC UPS power supply device, system and control method provided by the embodiments of the present invention realize multiplexing of multiple converters through a high-frequency transformer, thereby reducing the complexity of the logic timing control and improving the charging and discharging efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention se rapporte au domaine technique de l'électronique de puissance et concerne un dispositif de système d'alimentation sans coupure à courant continu (UPS) (1), un système (2) et un procédé de commande. Le dispositif UPS à courant continu (1) comprend un circuit d'entrée de courant alternatif (11), un circuit de sortie de courant continu (12), et un circuit de charge et de décharge de batterie (13). Le circuit d'entrée de courant alternatif (11) est couplé au circuit de sortie de courant continu (12) et au circuit de charge et de décharge de batterie (13) au moyen d'un transformateur. Quand un courant est entré dans le circuit d'entrée de courant alternatif (11), le circuit d'entrée de courant alternatif (11) transmet de l'énergie au circuit de sortie de courant continu (12) et au circuit de charge et de décharge de batterie (13) au moyen du transformateur. Quand aucun courant n'est entré dans le circuit d'entrée de courant alternatif (11), le circuit de charge et de décharge de batterie (13) transmet de l'énergie au circuit de sortie de courant continu (12) au moyen du transformateur. La présente invention résout le problème technique de l'état de la technique selon lequel un dispositif UPS classique a besoin de 2 ou 3 convertisseurs haute fréquence, et le courant ne peut être émis qu'après deux phases d'isolation pendant la décharge, de telle sorte que trop de convertisseurs de circuit sont nécessaires, la commande de séquence temporelle logique est complexe, et l'efficacité de décharge est réduite.
PCT/CN2017/101380 2017-07-27 2017-09-12 Dispositif ups à courant continu, système et procédé de commande WO2019019297A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710636494.6 2017-07-27
CN201710636494.6A CN107332341A (zh) 2017-07-27 2017-07-27 直流ups电源装置以及系统

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WO2019019297A1 true WO2019019297A1 (fr) 2019-01-31

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CN108583352A (zh) * 2018-06-26 2018-09-28 安徽聚捷汽车电子有限公司 一种三合一车载充电装置
CN109703399B (zh) 2018-12-27 2021-05-18 台达电子企业管理（上海）有限公司 车载充放电系统及其所适用的控制方法
DE102019003458A1 (de) * 2019-05-15 2020-01-09 Daimler Ag Bordlader und Verfahren zum Laden einer Hochvoltbatterie eines Hochvoltbordnetzes oder einer Niedervoltbatterie eines Niedervoltbordnetzes
CN111490588B (zh) * 2020-04-02 2023-07-14 国网浙江省电力有限公司杭州供电公司 变电站通信电源与操作电源互为备份的实现方法

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CN101572420A (zh) * 2008-04-30 2009-11-04 冉茂鑫 电流型双输入不间断开关电源
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EP2903125A1 (fr) * 2012-09-29 2015-08-05 Emerson Network Power Co., Ltd Alimentation sans coupure (ups) et son circuit continu-continu
CN105790429A (zh) * 2016-04-28 2016-07-20 上海电机学院 基于双向dcdc变换器的小功率不间断电源及控制方法
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CN106685039A (zh) * 2015-11-11 2017-05-17 上海汽车集团股份有限公司 一种充放电装置及其控制方法
CN205583829U (zh) * 2016-02-18 2016-09-14 扬州鑫鸿电子有限公司 一种基于dsp的在线式ups系统

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Publication number Priority date Publication date Assignee Title
CN101572420A (zh) * 2008-04-30 2009-11-04 冉茂鑫 电流型双输入不间断开关电源
CN201247966Y (zh) * 2008-06-02 2009-05-27 旭隼科技股份有限公司 在线交互式不断电装置及充电器
CN101860218A (zh) * 2010-04-26 2010-10-13 南京航空航天大学 一种三端口直流变换器
EP2903125A1 (fr) * 2012-09-29 2015-08-05 Emerson Network Power Co., Ltd Alimentation sans coupure (ups) et son circuit continu-continu
CN106410945A (zh) * 2015-07-29 2017-02-15 深圳市泰金田科技有限公司 一种交直流供电装置
CN105790429A (zh) * 2016-04-28 2016-07-20 上海电机学院 基于双向dcdc变换器的小功率不间断电源及控制方法

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