CN109546860B - Half-bridge-full-bridge combined direct current converter based on component multiplexing - Google Patents

Half-bridge-full-bridge combined direct current converter based on component multiplexing Download PDF

Info

Publication number
CN109546860B
CN109546860B CN201811292961.9A CN201811292961A CN109546860B CN 109546860 B CN109546860 B CN 109546860B CN 201811292961 A CN201811292961 A CN 201811292961A CN 109546860 B CN109546860 B CN 109546860B
Authority
CN
China
Prior art keywords
bridge
capacitor
secondary winding
direct current
full
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811292961.9A
Other languages
Chinese (zh)
Other versions
CN109546860A (en
Inventor
赵雷
范衠
施羿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shantou University
Original Assignee
Shantou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shantou University filed Critical Shantou University
Priority to CN201811292961.9A priority Critical patent/CN109546860B/en
Publication of CN109546860A publication Critical patent/CN109546860A/en
Application granted granted Critical
Publication of CN109546860B publication Critical patent/CN109546860B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Rectifiers (AREA)

Abstract

The embodiment of the invention discloses a half-bridge-full-bridge combined direct current converter based on component multiplexing, which comprises a direct current power supply, an inverter bridge arm, an isolation transformer, a blocking capacitor, a rectifying circuit and a filter circuit, wherein an auxiliary transformer and a voltage-dividing capacitor are introduced on the basis of a full-bridge structure consisting of the direct current power supply, the inverter bridge arm, the isolation transformer, the blocking capacitor and the rectifying circuit. The direct current converter has the characteristics of wide zero-voltage switching range, no circulating current loss, small current ripple and the like, and is simple in circuit structure and high in conversion efficiency.

Description

Half-bridge-full-bridge combined direct current converter based on component multiplexing
Technical Field
The invention relates to the technical field of power electronics, in particular to a half-bridge-full-bridge combined direct current converter based on component multiplexing.
Background
In power electronic equipment, a dc converter is used to convert a dc signal into another dc quantity of fixed or adjustable voltage, and research on the dc converter is also widely focused by power electronic technology practitioners at home and abroad. The direct current converter can be divided into three topologies, namely a single-tube topology, a double-tube topology and a full-bridge topology according to the number of switching tubes contained in the direct current converter. Generally speaking, the power level of a dc converter is proportional to the number of switching tubes, a full-bridge converter composed of four switching tubes has the highest power level, when a phase-shift control mode is adopted, the switching tubes can realize soft switching, the switching frequency is fixed, and the dc converter is widely applied to medium and high power occasions.
Although the structure of the direct current converters in different forms has great difference, the structure can be divided into three parts: the first is chopping, and the switching controllability of a power electronic device is utilized to chop input direct current to obtain a signal containing high-frequency alternating current components; secondly, rectifying, namely setting the alternating current part to obtain a signal containing a direct current component and a high-frequency alternating current component; and thirdly, filtering high-frequency alternating current components in the signals, and realizing stable direct current output. Although the topology of the direct current converters in different forms has great difference, the constituent units of the direct current converters generally have certain regularity. The characteristic enables multiplexing of components between different topologies, and further improves the operating characteristics of the conversion system.
In practical application, the conventional phase-shifted full-bridge converter mainly has the following problems: the voltage of the rectifier diode is oscillated, the soft switching range of a lag bridge arm is narrow, and the primary side has circulation loss and duty ratio loss. The full-bridge converter comprises four switching tubes and two half-bridge arms, and based on the idea of component multiplexing, one of the arms can be used for forming a half-bridge topology to realize the multiplexing of the switching tubes. The secondary sides of the half-bridge and the full-bridge topology can adopt different topology forms to combine to realize the performance improvement of the traditional phase-shifted full-bridge converter.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a half-bridge-full-bridge combined dc converter based on component multiplexing. The zero-voltage switching range of the switching tube can be widened, the circulation loss is eliminated, the output ripple is reduced, and the conversion efficiency of the converter is improved.
In order to solve the above technical problem, an embodiment of the present invention provides a half-bridge to full-bridge combined dc converter based on component multiplexing, including first to fourth switching tubes, first to third capacitors, first and second isolation transformers, first to fourth rectifying diodes, and a dc power supply;
the first to fourth switching tubes form a full-bridge circuit, are connected with the positive and negative output ends of the direct-current power supply in parallel in the forward direction, and are connected with the positive and negative output ends of the direct-current power supply in parallel after being connected in series;
the first isolation transformer comprises a primary winding and a secondary winding, one end of the primary winding is connected with the connection point of the first switching tube and the third switching tube, the other end of the primary winding is connected with one end of the third capacitor, one end of the secondary winding is connected with the cathode of the first rectifier diode and the anode of the third rectifier diode, the other end of the secondary winding is connected with the cathode of the second rectifier diode and the anode of the fourth rectifier diode, and the other end of the third capacitor is connected with the connection point of the second switching tube and the fourth switching tube;
the second isolation transformer comprises a primary winding and two secondary windings, one end of the primary winding is connected with the connection point of the second switching tube and the fourth switching tube, the other end of the primary winding is connected with the connection point of the first capacitor and the second capacitor, one end of one secondary winding is connected with the cathode of the third rectifying diode, one end of the other secondary winding is connected with the cathode of the fourth rectifying diode, and the other ends of the two secondary windings are directly connected.
The other end of the two secondary windings of the second isolation transformer is connected with one end of the filter inductor, the other end of the filter inductor is connected with one end of the fourth capacitor to serve as a positive end of output voltage, and the other end of the fourth capacitor is connected with anodes of the first rectifying diode and the second rectifying diode to serve as a negative end of the output voltage.
The embodiment of the invention has the following beneficial effects: the phase-shifting control mode of the converter is the same as that of a conventional full-bridge converter, an auxiliary transformer and a voltage-dividing capacitor are introduced by multiplexing a lagging bridge arm of the full-bridge converter, a half-bridge topological structure is constructed, the half-bridge topology operates under the working condition of full duty ratio, the continuity of power transmission of the primary side and the secondary side is guaranteed, the primary side circulating current loss can be eliminated, the output ripple wave is reduced, meanwhile, the soft switching range of a lagging switching tube can be widened by increasing the exciting current of the auxiliary transformer, and the exciting current only flows through the lagging bridge arm without causing excessive conduction loss.
On the secondary side of the converter, a bridge rectification structure is adopted in a full-bridge topology, a full-wave rectification structure is adopted in an introduced half-bridge topology, the two rectifiers are combined in series, and a group of rectifier diodes and an output filter are multiplexed, so that the number of additional components is reduced, and the power density of the converter is improved.
Drawings
FIG. 1 is a schematic diagram of the overall circuit configuration of the present invention;
wherein: vinIs a DC power supply, Q1、Q2、Q3、Q4Respectively a first to a fourth switching tube, C1、C2、Cb、CoAre respectively a first to a fourth capacitor，T1、T2Respectively a first and a second isolation transformer, np、mpPrimary windings of first and second isolation transformers, nsIs the secondary winding of the first isolation transformer, ms1、ms2Secondary windings, D, of a second isolating transformer, respectively1、D2、D3、D4Are respectively a first to a fourth rectifier diode, LoIs a filter inductor and R is a load resistor.
FIG. 2 is a schematic diagram of an equivalent circuit diagram of the present invention;
FIG. 3 is a schematic representation of the principal operating waveforms of FIG. 2 provided by the present invention;
FIGS. 4-10 are equivalent circuit diagrams of FIG. 2 in different modes according to the present invention.
The essential physical quantities in the above figures are: d is the duty cycle, TsIs a switching cycle with a load current of IoN is T1、T2Ratio of turns of secondary side to primary side of transformer, LklIs T1Is less than the leakage inductance ofk2Is T2Is less than the leakage inductance ofmIs T2Excitation inductance of, C1And C2Equivalent to a constant voltage source of 0.5VinThe filter inductor is equivalent to a constant current source Io。
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The circuit connection schematic diagram of the invention is shown in fig. 1, and the half-bridge-full-bridge combined direct current converter based on component multiplexing comprises a first switch tube (Q) to a fourth switch tube (Q)1～Q4) First and second isolation transformers (T)1、T2) First to fourth rectifier diodes (D)1～D4) First to fourth capacitors (C)1、C2、Cb、Co) DC power supply (V)in) And a filter inductance (L)o) Transformer T1Comprising a primary winding npAnd a secondary winding nsTransformer T2Comprising a primary winding mpAnd secondary winding ms1、ms2。
The first to the fourth switching tubes form a full bridge circuit, the positive and the negative output ends of the direct current power supply are connected in parallel in the forward direction, the first and the second capacitors are connected in parallel after being connected in series, the first isolation transformer comprises a primary winding and a secondary winding, one end of the primary winding is connected with the connection point of the first and the third switching tubes, the other end of the primary winding is connected with one end of the third capacitor, one end of the secondary winding is connected with the cathode of the first rectifier diode and the anode of the third rectifier diode, the other end of the secondary winding is connected with the cathode of the second rectifier diode and the anode of the fourth rectifier diode, the other end of the third capacitor is connected with the connection point of the second and the fourth switching tubes, the second isolation transformer comprises a primary winding and two secondary windings, one end of the primary winding is connected with the connection point of the second and the fourth switching tubes, the other end of the primary winding is connected with the connection point of the, one end of one secondary winding is connected with the cathode of the third rectifier diode, one end of the other secondary winding is connected with the cathode of the fourth rectifier diode, the other ends of the secondary windings are directly connected and connected with one end of the filter inductor, the other end of the filter inductor is connected with one end of the fourth capacitor, the connection point is the positive end of the output voltage, and the other end of the fourth capacitor is connected with the anodes of the first rectifier diode and the second rectifier diode and serves as the negative end of the output voltage.
In one embodiment of the present invention, Q1、Q3Form a leading bridge arm, Q2、Q4Forming a lagging leg of the transformer T1DC blocking capacitor CbForm a full bridge topology, Q2、Q4、C1、C2And T2Forming a half-bridge topology, when the dead time is ignored, the duty ratio of each switching tube is 0.5, adjusting the phase shift angle between two bridge arms to realize the regulation of the output voltage, wherein on the secondary side, the full-bridge topology adopts a bridge rectifier structure, the half-bridge topology adopts a full-wave rectifier structure, and two groups of rectifiers share D2、D4A diode and an output filter as in figure 1.
The following describes a specific working principle of the present invention with an equivalent circuit simplified in fig. 2 and with reference to fig. 3 to 10. As can be seen from FIG. 3, the whole converter has 14 switching modes in one switching period, which are t0～t1]、[t1～t2]、[t2～t3]、[t3～t4]、[t4～t5]、[t5～t6]、[t6～t7]、[t7～t8]、[t8～t9]、[t9～t10]、[t10～t11]、[t11～t12]、[t12～t13]、[t13～t14]Wherein, [ t ]0～t7]For the first half period, [ t ]7～t14]In the latter half cycle, the operation of each switching mode is specifically analyzed below.
To simplify the analysis, the following assumptions were made: 1) all devices are ideal devices; 2) the parasitic devices of the switch tube only consider the body diode and the junction capacitance; 3) ignore T1The leakage inductance of the exciting inductance of the transformer is Lkl；4)T2Has an excitation inductance of LmLeakage inductance of Lk2(ii) a 5) Output filter inductance LoAs a constant current source, a capacitor C1And C2Equivalent to a constant voltage source.
Switched mode 1[ t ]0～t1](corresponding to FIG. 4): q1、Q4、D2、D3Conduction is carried out in a duty cycle period, the output filter inductor can be mapped to a primary side, the primary side current is approximately a constant value, and CbThe voltage increases linearly.
Switched mode 2[ t ]1～t2](corresponding to FIG. 5): at t1Time, Q1Off, Q1、Q3The junction capacitor is charged and discharged linearly through a constant current source, the midpoint voltage of the leading arm, the rectified voltage and the T1The primary and secondary side voltages of the transformer begin to drop linearly.
Switching mode 3[ t ]2～t3](corresponding to FIG. 6): at t2Time, leading arm midpoint voltage, T1The primary and secondary side voltages of the transformer are reduced to 0, D1On, D1、D2Start of commutation, T1Is short-circuited. At t3Time, vleaDown to 0, Q3Is turned on by the body diode, Q3Zero voltage turn-on can be achieved during this period CbApproximately constant application of voltage to Lk1Upper, primary side current ipLinearly decreases at t4At that time, the primary current drops to zero and D1、D2End of commutation, D2And (6) turning off.
Switch mode 4[ t ]3～t4](corresponding to FIG. 7): in the time period, the primary side current i of the full-bridge topologypIs zero, D1、D3And remains on for a period referred to as a non-duty cycle period.
Switching mode 5[ t ]4～t5](corresponding to FIG. 8): at t4Time, Q4Turn off, linear rise of midpoint voltage in lagging arm, D4The reverse voltage at both ends gradually decreases.
Switched mode 6[ t ]5～t6](corresponding to FIG. 9): at t5Time of day, D4The voltages at both ends drop to zero, T1And T2The secondary winding is connected in parallel, the junction capacitance and the leakage inductance start to resonate, the midpoint voltage of the lagging arm resonates and rises at t6At that time, the midpoint voltage of the lagging arm rises to Vin，Q2The body diode begins to conduct and, therefore, Q2Zero voltage turn-on can be achieved.
Switch mode 7[ t ]6～t7](corresponding to FIG. 10): d4Increasing the current gradually, D3The current gradually decreases at t7Time D3The current drops to zero and the converter enters the second half cycle.
Second half period [ t ]7～t14]Working principle of (1) and the first half period [ t ]0～t7]Basically, the same is true, but the current and the voltage change in opposite directions, and the description is not repeated.
Summarizing the working process, all the switching tubes of the converter can realize zero-voltage switching, half-bridge topology runs at a full duty ratio, the continuity of power transmission of the primary side and the secondary side is ensured, the primary side circulating current loss and the output current ripple are reduced, and the exciting current only passes through the lagging arm, so that the soft switching range of the lagging tube can be widened by increasing the exciting current, but the conduction loss cannot be obviously increased.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (2)

1. A half-bridge-full-bridge combined direct current converter based on component multiplexing is characterized by comprising first to fourth switch tubes, first to third capacitors, first and second isolation transformers, first to fourth rectifier diodes and a direct current power supply;
the first capacitor and the second capacitor are connected in series and then connected in parallel to the positive output end and the negative output end of the direct current power supply;
the first isolation transformer comprises a primary winding and a secondary winding, wherein the dotted end of the primary winding is connected with the connection point of the first ends of the first and third switching tubes, the dotted end of the primary winding is connected with one end of the third capacitor, the second ends of the first and second switching tubes are connected with the positive end of a power supply, the second ends of the third and fourth switching tubes are connected with the negative end of the power supply, the dotted end of the secondary winding is connected with the cathode of the first rectifying diode and the anode of the third rectifying diode, the dotted end is connected with the cathode of the second rectifying diode and the anode of the fourth rectifying diode, the anodes of the first and second rectifying diodes are connected to form a negative output end, and the other end of the third capacitor is connected with the first ends of the second and fourth switching tubes;
the second isolation transformer comprises a primary winding, a first secondary winding and a second secondary winding, the homonymous end of the primary winding is connected with the connection point of the second switching tube and the fourth switching tube, the synonym end of the primary winding is connected with the connection point of the first capacitor and the second capacitor, the synonym end of the first secondary winding is connected with the cathode of the third rectifying diode, the homonymous end of the second secondary winding is connected with the cathode of the fourth rectifying diode, and the homonymous end of the first secondary winding is directly connected with the synonym end of the second secondary winding.
2. The half-bridge-full-bridge combined direct-current converter based on component multiplexing of claim 1, further comprising a fourth capacitor and a filter inductor, wherein the dotted end of the first secondary winding and the dotted end of the second secondary winding of the second isolation transformer are both connected with one end of the filter inductor, the other end of the filter inductor is connected with one end of the fourth capacitor to serve as a positive end of the output voltage, and the other end of the fourth capacitor is connected with anodes of the first and second rectifier diodes to serve as a negative end of the output voltage.
CN201811292961.9A 2018-10-31 2018-10-31 Half-bridge-full-bridge combined direct current converter based on component multiplexing Active CN109546860B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811292961.9A CN109546860B (en) 2018-10-31 2018-10-31 Half-bridge-full-bridge combined direct current converter based on component multiplexing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811292961.9A CN109546860B (en) 2018-10-31 2018-10-31 Half-bridge-full-bridge combined direct current converter based on component multiplexing

Publications (2)

Publication Number Publication Date
CN109546860A CN109546860A (en) 2019-03-29
CN109546860B true CN109546860B (en) 2020-03-20

Family

ID=65846286

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811292961.9A Active CN109546860B (en) 2018-10-31 2018-10-31 Half-bridge-full-bridge combined direct current converter based on component multiplexing

Country Status (1)

Country Link
CN (1) CN109546860B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114900047A (en) * 2022-04-20 2022-08-12 汕头大学 Hybrid three-level direct current converter based on double-transformer structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100828179B1 (en) * 2006-08-29 2008-05-08 한국전기연구원 multi-phase flyback and forward synchronous rectifier
CN101202507A (en) * 2007-12-11 2008-06-18 株洲南车时代电气股份有限公司 New type phase shifting full bridge soft switch converter
CN101604917A (en) * 2009-06-24 2009-12-16 南京航空航天大学 Adopt the Zero-voltage switch full-bridge direct current converter of passive auxiliary network
US20150256087A1 (en) * 2013-11-07 2015-09-10 Ionel Jitaru Soft Switching Converter with Dual Transformer by Steering the Magnetizing Current
CN107493015B (en) * 2017-09-14 2019-08-23 北京理工大学 A kind of two-way DC converter and its Poewr control method of dual transformer structure

Also Published As

Publication number Publication date
CN109546860A (en) 2019-03-29

Similar Documents

Publication Publication Date Title
WO2021077757A1 (en) Wide gain control method for variable topology llc resonant converter
CN109217681B (en) Bidirectional resonant converter
CN108028605B (en) Converter with hold-up operation
WO2021042773A1 (en) Llc resonant converter and control method
CN106685231B (en) A kind of primary side clamper type soft switch full bridge converter and its asymmetric control method
CN111181408B (en) Resonant converter based on hybrid rectification structure and control method
WO2015106701A1 (en) Ac-dc conversion circuit and control method therefor
US20020012259A1 (en) Switching power supply having an improved power factor by voltage feedback
EP1772950A2 (en) Switching power supply circuit
TW200929814A (en) DC transformer
KR101000561B1 (en) Series resonant converter
US11146176B2 (en) Switch-mode power supplies including three-level LLC circuits
US11601060B2 (en) Switch-mode power supplies including three-level LLC circuits for low line and high line operation
CN106505866B (en) A kind of three Level Full Bridge DC converters
CN109245545B (en) High-voltage gain LCL resonant DC-DC converter
CN109302078B (en) DC-DC switching power supply based on synchronous rectification mode
CN110572039A (en) Novel full-bridge direct-current converter based on current-doubling rectifier
CN110445387B (en) Topological structure and control method of formation and grading power supply
CN109245547B (en) A kind of mixed-rectification formula Zero-voltage switch full-bridge direct current converter
CN113765358A (en) Single-stage interleaved parallel AC-DC resonant conversion circuit and control method thereof
CN103782499A (en) Isolated switch-mode dc/dc converter with sine wave transformer voltages
CN109546860B (en) Half-bridge-full-bridge combined direct current converter based on component multiplexing
CN110729906A (en) Zero-voltage conversion CLL resonant DC-DC converter and control method thereof
CN113452259B (en) Two-inductor current type converter and design method thereof
CN116111830A (en) Half-bridge-full-bridge combined LLC resonant direct-current converter based on double transformers

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant