CN108923658A - LLC resonant converter - Google Patents
LLC resonant converter Download PDFInfo
- Publication number
- CN108923658A CN108923658A CN201810744843.0A CN201810744843A CN108923658A CN 108923658 A CN108923658 A CN 108923658A CN 201810744843 A CN201810744843 A CN 201810744843A CN 108923658 A CN108923658 A CN 108923658A
- Authority
- CN
- China
- Prior art keywords
- switch
- tube
- bridge arm
- diode
- secondary side
- 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.)
- Granted
Links
- 238000010586 diagram Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000004804 winding Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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
- 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
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
Abstract
The invention discloses a kind of LLC resonant converters, including power input, first switch bridge arm, resonant network, second switch bridge arm, rectifying output circuit, load outputs, the both ends of the first switch bridge arm connect power input, and the midpoint of first switch bridge arm connects one end of the resonant network；The other end of the resonant network connects the midpoint of the second switch bridge arm；The cathode of one end connection power input of the second switch bridge arm, the other end connect the output end of rectifying output circuit, and the load outputs connect rectifying output circuit.The configuration of the present invention is simple can realize that Width funtion input is load supplying under narrow frequency.The present invention is suitable for any load for needing stable high voltage powered by direct current.
Description
Technical field
The invention belongs to load supplying field, be related to it is a kind of providing the converter of stable DC electricity to apply, specifically
It is a kind of LLC resonant converter.
Background technique
Currently, the power battery for load supplying has the characteristics that output voltage is high, range is wide, such as lithium battery output voltage
Generally 200-400V.But most of communication system, UPS and direct current generator etc. need a stable high-voltage DC power supply
Power supply provides stable direct current so must access the DC/DC converter of Width funtion input after lithium battery for load
Electricity.It would therefore be desirable to study a kind of unidirectional DC/DC converter that high efficiency is suitble to wide-voltage range to input.
LLC converter has Sofe Switch easy to accomplish, the high advantage of efficiency of transmission, therefore in Switching Power Supply in the prior art
In be widely used.And the voltage range of LLC converter how is improved in load supplying, to enable it that can provide height for load
Straightening stream is the emphasis studied at present.
Summary of the invention
It is existing in the prior art above insufficient to solve, the present invention is intended to provide a kind of LLC resonant converter, with order pair
The cleaning effect of sufferer is more preferable.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of LLC resonant converter, including power input, first switch bridge arm, resonant network, second switch bridge arm, rectification
Output circuit, load outputs, the both ends of the first switch bridge arm connect power input, and the midpoint of first switch bridge arm connects
Connect one end of the resonant network；The other end of the resonant network connects the midpoint of the second switch bridge arm；Described second
The cathode of one end connection power input of bridge arm is switched, the other end connects the output end of rectifying output circuit, and the load is defeated
Outlet connects rectifying output circuit.
As limitation of the invention：The first switch bridge arm, second switch bridge arm are half-bridge power switch pipe knot
Structure, the first switch bridge arm include the first switch tube and second switch of concatenation, and the second switch bridge arm includes concatenation
Third switching tube and the 4th switching tube, wherein the frequency of first switch tube to the 4th switching tube is identical, duty ratio is 0.5,
And first switch tube is identical as the phase of third switching tube, second switch is identical as the phase of the 4th switching tube, first switch
Manage 180 ° of phase phase difference with second switch.
As the restriction to resonant network in the present invention：The resonant network includes the resonant inductance being sequentially connected in series, transformation
Device primary side side, resonant capacitance.
As the restriction to rectifying output circuit in the present invention：The rectifying output circuit includes having tapped change
The secondary side of depressor, and and the first diode that connects and the second diode；One end of the first diode connects transformer
One end of secondary side, the other end of one end connection transformer secondary side of the second diode, first diode and the second diode
The other end of not connected transformer secondary side is all connected with one end of load outputs, and the other end of load outputs connects transformer
The tap of secondary side.
As the restriction to transformer in the present invention：The tap of transformer negative side side is located in transformer secondary side
Heart position.
It is further limited as to transformer in the present invention：The tap of transformer negative side side is located at transformer secondary
The center of side.
As to last a kind of restriction of the invention：The first switch tube, second switch, third switching tube, the 4th
Switching tube is one of MOSFET power tube, IGBT power tube, GTO power tube.
Due to the adoption of the above technical solution, compared with prior art, the present invention acquired beneficial effect is：
First switch bridge arm is constituted using first switch tube S1 and second switch S2 in the present invention, and third switching tube S3 and the
Four switching tube S4 constitute second switch bridge arm, in use, the input voltage of the LLC converter and transimission power are in normal model
When enclosing, by changing the switching frequency of four switching tubes, output voltage stabilization is realized.
First switch tube S1 to the 4th switching tube S4 is all made of power transistor in the present invention, and frequency is identical, duty ratio
It is 0.5, and first switch tube S1 is identical as third switching tube S3 phase, second switch S2 and the 4th switching tube S4 phase phase
Together, 180 ° of phase phase difference between first switch tube S1 and second switch S2, and then can be by control first switch tube S1 extremely
The opening and closing of 4th switching tube S4 enables the present invention when the input voltage is smaller, and the gain of the LLC converter is similar to full-bridge
The gain of LLC converter；And when the input voltage is larger, the gain of the LLC converter is similar to half-bridge LLC converter
Gain, therefore LLC converter of the invention can be realized under narrow frequency Width funtion input；
The no-voltage that power switch tube may be implemented in the present invention is open-minded（ZVS）With the zero-current switching of rectifier diode（ZCS）.
In conclusion the configuration of the present invention is simple, can realize that Width funtion input is load supplying under narrow frequency.
The present invention is suitable for any load for needing stable high voltage powered by direct current.
Detailed description of the invention
With reference to the accompanying drawing and specific embodiment makees more detailed description to the present invention.
Fig. 1 is the electric structure principle chart of the embodiment of the present invention；
Fig. 2 is the simulation waveform of the embodiment of the present invention；
Fig. 3 a is the embodiment of the present inventiont 0~t 1The equivalent circuit diagram in stage；
Fig. 3 b is the embodiment of the present inventiont 1~t 3The equivalent circuit diagram in stage;
Fig. 3 c is the embodiment of the present inventiont 3~t 4The equivalent circuit diagram in stage;
Fig. 3 d is the embodiment of the present inventiont 4~t 5The equivalent circuit diagram in stage;
Fig. 4 a is the equivalent circuit diagram of Fig. 3 a；
Fig. 4 b is the equivalent circuit diagram of Fig. 3 b；
Fig. 4 c is the equivalent circuit diagram of Fig. 3 c；
Fig. 5 is the experimental section waveform of the embodiment of the present invention；
Fig. 6 is the Sofe Switch waveform of the embodiment of the present invention；
The comparison of wave shape of the gain of Fig. 7 embodiment of the present invention and half-bridge LLC gain and full-bridge LLC gain.
Specific embodiment
Embodiment LLC resonant converter
The present embodiment is as shown in Figure 1, include：
1. power input.
2. first switch bridge arm connects the both ends of power input, including the first switch tube S1 being sequentially connected in series and second
Switching tube S2, the wherein anode of first switch tube S1 connection power input, and second switch S2 and power input is negative
Extremely common ground connection.
3. second switch bridge arm, including the third switching tube S3 and the 4th switching tube S4 being sequentially connected in series, the third switch
Pipe S3 is not connected with one end ground connection of the 4th switching tube S4.
4. resonant network, primary side winding, resonant capacitance Cr including the resonant inductance Lr, transformer T that are sequentially connected in series, wherein
Midpoint of the free end of resonant inductance Lr as one end connection first switch bridge arm of resonant network, and the freedom of resonant capacitance Cr
Hold the midpoint of the two switch bridge arm of other end connection as resonant network.
5. rectifying output circuit, vice-side winding, first diode D1, the second diode D2 including transformer T, wherein becoming
The vice-side winding of depressor T has tap, and the position of tap is located at the middle of vice-side winding, first diode D1 and the two or two pole
The 4th switching tube S4 of connection is not connected with one end of third switching tube S3 after pipe D2 cathode is connected, and the anode of first diode D1 connects
One end of the vice-side winding of transformer T is connect, the anode of the second diode D2 then connects the other end of the vice-side winding of transformer T.
6. load outputs, including and the capacitor C that connects and resistance R, load outputs one end connect first diode D1 with
The cathode of second diode D2, the other end connect the centre tap of the vice-side winding of transformer T.
In above structure, the first switch tube S1 to the 4th switching tube S4 is power switch tube knot in the prior art
Structure, such as MOSFET power tube in the prior art or IGBT power tube or GTO power tube.And first switch tube S1 is extremely
The frequency of 4th switching tube S4 is identical, duty ratio is 0.5；And in phase first switch tube S1 and third switching tube S3 phase
Identical, second switch S2 is identical as the phase of the 4th switching tube S4, the phase phase of first switch tube S1 and second switch S2
Poor 180 °.
Lm is the equivalent magnetizing inductance of transformer, i in Fig. 1LrFor the electric current of resonant inductance Lr, iLmFor the electricity of magnetizing inductance Lm
Stream, ucrVoltage, Vtank for the both ends resonant capacitance Cr are resonance tank voltage, iDO1For the electric current for flowing through first diode D1, iDO2
For the electric current for flowing through the second diode D2.In order to preferably introduce the present embodiment, as shown in Fig. 2, the worked of the present embodiment
Journey is divided into 0~t9 10 stages, and Fig. 3 a to Fig. 3 d is to the present embodiment specific works circuit diagram when being then different phase, figure
Electric current is without flow through this route when middle dotted portion represents the stage, thus combine Fig. 3 a-3d for per stage working principle into
Row detailed analysis.
Stage one（t0~t1）：As shown in Figure 3a, t0Moment, dead time terminate, first switch tube S1 and third switching tube
S3 conducting, due to resonant inductance electric current iLrFor negative value, iLrAbsolute value start to reduce, have numerical value be iLm-iLrElectric current flow through change
Depressor T is transmitted to the secondary side of transformer T, first diode D1 conducting, and magnetizing inductance Lm is clamped, and does not participate in resonance, equivalent electricity
Road refers to Fig. 4 a.This stage resonance frequency is fr, and the secondary side energy of transformer T is provided by resonant inductance Lr.Before this, resonance
Electric current flows through the anti-paralleled diode of first switch tube S1 and third switching tube S3, and first switch tube S1 and third switching tube S3 are real
Existing ZVS.
Stage two（t1~t2）：As shown in Figure 3b, t1Moment, iLrAbsolute value be reduced to 0 and it is positive rise, start to flow
First switch tube S1 is crossed, the size of current for flowing through transformer T becomes iLm+iLr, first diode D1 continues to be connected, magnetizing inductance
Lm is clamped, and does not participate in resonance, and equivalent circuit refers to Fig. 4 b.This stage resonance frequency is fr, and the secondary side energy of transformer T is by defeated
Power supply offer is provided.
Stage three（t2~t3）：Still as shown in Figure 3b, iLrMaintain direction constant, in t2Moment, iLmCommutation, magnetizing inductance
Lm is in and is electrically charged state, exciting current iLmIt gradually increases, the size of current for flowing through transformer T becomes iLr-iLm, in t3Moment,
iLmEqual to iLr, transformer T primary side does not have electric current at this time, and secondary side output electric current is 0, and the electric current for flowing through two diodes is 0, real
Existing ZCS, equivalent circuit refer to Fig. 4 b.This stage resonance frequency is fr, and the secondary side energy of transformer T is still provided by input power.
Stage four（t3~t4）：As shown in Figure 3c, in this stage, iLrAnd iLmContinue to keep equal, transformer T primary side does not have
There is electric current, magnetizing inductance Lm is detached from clamper, participates in resonance, and resonance frequency becomes fm, and load energy is provided by filter capacitor C,
During first switch tube S1 and second switch S3 is connected, the voltage at the both ends second switch S2 is input voltage Vi, the 4th opens
The voltage for closing the both ends pipe S4 is output voltage Vo, and equivalent circuit refers to Fig. 4 c.
Stage five（t4~t5）：As shown in Figure 3d, the present embodiment enters dead zone, first switch tube S1 to the 4th switching tube S4
All close, second switch S2, the 4th switching tube S4 parasitic capacitance Coss2 and Coss4 electric discharge then reverse charging until
The diode current flow of second switch S2 and the 4th switching tube S4, while the parasitism electricity of first switch tube S1 and third switching tube S3
Hold Coss1 and Coss3 to start to charge to input voltage Vi and output voltage Vo.This stage resonance frequency be fm, load energy by
Filter capacitor provides.
The lower half period of the present embodiment（That is t5~t9Stage）Similar with the upper half period, only filter capacitor C acts as input
The role of power supply.
In order to facilitate each stage is understood, according to the switching mode and excitation of first switch tube S1 to the 4th switching tube S4 electricity
Whether sense Lm participates in resonance, does not consider dead zone situation, the operating mode of the resonant slots of the present embodiment is divided into three phases, and
Domain equation expression formula when being calculated.
Stage one, stage two, the equivalent model in stage three are as shown in Figure 3a, and domain equation expression formula is at that time：
In formula, angular frequency, characteristic impedance, n is the transformer primary pair side turn ratio, and Vi is input electricity
Pressure, Vo is output voltage,。
The equivalent model in stage four is as shown in Figure 3b, and domain equation expression formula is at that time：
In formula, angular frequency, characteristic impedance,。
Lower half period t5-t8When segment model as shown in Fig. 3-c, domain equation expression formula is at that time：
To this LLC converter, input voltage, magnetizing inductance and resonant inductance ratio, product
Prime factor, resonance frequency, transformer voltage ratio 4:3, stablize output
Voltage 240V, switching frequency change within the scope of 43KHz-60KHz, and switching frequency variation is up to 17KHz.And traditional LLC frequency
Convert 61.02KHz.
Fig. 5 gives that input voltage of the embodiment of the present invention is 400V, part is real when output voltage 240V, power are 1kW
Waveform is tested, wherein waveform is followed successively by from top to bottom, first switch tube S1 driving signal, resonance tank voltage VtankAnd resonance current
iLr, the frequency of first switch tube S1 to the 4th switching tube S4 is 60kHz at this time, is equal to resonance frequency fr。
Fig. 6 give input voltage of the embodiment of the present invention be 400V, Sofe Switch when output voltage 240V, power are 1kW
Waveform, due to symmetry, measuring the driving signal V of second switch S2 and third switching tube S3 respectivelygsAnd leakage
Source voltage Vds, judge that Sofe Switch may be implemented with this.
Claims (10)
1. a kind of LLC resonant converter, it is characterised in that：Including power input, first switch bridge arm, resonant network, second
Bridge arm, rectifying output circuit, load outputs are switched, the both ends of the first switch bridge arm connect power input, and first opens
The midpoint for closing bridge arm connects one end of the resonant network；The other end of the resonant network connects the second switch bridge arm
Midpoint；The cathode of one end connection power input of the second switch bridge arm, the other end connect the output of rectifying output circuit
End, the load outputs connect rectifying output circuit.
2. LLC resonant converter according to claim 1, it is characterised in that：The first switch bridge arm, second switch bridge
Arm is half-bridge power switch pipe structure, and the first switch bridge arm includes the first switch tube and second switch of concatenation, institute
The third switching tube and the 4th switching tube that second switch bridge arm includes concatenation are stated, wherein the frequency of first switch tube to the 4th switching tube
Rate is identical, duty ratio is 0.5, and first switch tube is identical as the phase of third switching tube, second switch and the 4th switch
The phase of pipe is identical, and 180 ° of phase phase difference of first switch tube and second switch.
3. LLC resonant converter according to claim 1 or 2, it is characterised in that：The resonant network includes being sequentially connected in series
Resonant inductance, transformer primary avris, resonant capacitance.
4. LLC resonant converter according to claim 1 or 2, it is characterised in that：The rectifying output circuit includes having
The secondary side of tapped transformer, and and the first diode that connects and the second diode；The one of the first diode
One end of end connection transformer secondary side, the other end of one end connection transformer secondary side of the second diode, first diode
The other end for being not connected with transformer secondary side with the second diode is all connected with one end of load outputs, load outputs it is another
The tap of end connection transformer secondary side.
5. LLC resonant converter according to claim 3, it is characterised in that：The rectifying output circuit includes in having
Between tap transformer secondary side, and and the first diode that connects and the second diode；One end of the first diode
Connect transformer secondary side one end, the second diode one end connection transformer secondary side the other end, first diode with
The other end that second diode is not connected with transformer secondary side is all connected with one end of load outputs, the other end of load outputs
Connect the tap of transformer secondary side.
6. LLC resonant converter according to claim 4, it is characterised in that：The tap of transformer negative side side is located at
The center of transformer secondary side.
7. LLC resonant converter according to claim 5, it is characterised in that：The tap of transformer negative side side is located at
The center of transformer secondary side.
8. according to claim 1, LLC resonant converter described in any one of 2,5,6,7, it is characterised in that：Described first
Switching tube, second switch, third switching tube, the 4th switching tube are MOSFET power tube, in IGBT power tube, GTO power tube
One kind.
9. LLC resonant converter according to claim 3, it is characterised in that：The first switch tube, second switch,
Third switching tube, the 4th switching tube are one of MOSFET power tube, IGBT power tube, GTO power tube.
10. LLC resonant converter according to claim 4, it is characterised in that：The first switch tube, second switch,
Third switching tube, the 4th switching tube are one of MOSFET power tube, IGBT power tube, GTO power tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744843.0A CN108923658B (en) | 2018-07-09 | 2018-07-09 | LLC resonant converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810744843.0A CN108923658B (en) | 2018-07-09 | 2018-07-09 | LLC resonant converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108923658A true CN108923658A (en) | 2018-11-30 |
| CN108923658B CN108923658B (en) | 2020-06-09 |
Family
ID=64424907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810744843.0A Active CN108923658B (en) | 2018-07-09 | 2018-07-09 | LLC resonant converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108923658B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013106692A1 (en) * | 2012-01-13 | 2013-07-18 | Power-One, Inc. | Resonant converter with auxiliary resonant components and holdup time control circuitry |
| WO2013166579A1 (en) * | 2012-05-10 | 2013-11-14 | Arda Power Inc. | Dc-dc converter circuit using an llc circuit in the region of voltage gain above unity |
| CN104756385A (en) * | 2012-10-31 | 2015-07-01 | 麻省理工学院 | Systems and methods for a variable frequency multiplier power converter |
| WO2015136097A1 (en) * | 2014-03-14 | 2015-09-17 | Eisergy Limited | A switched mode ac-dc converter |
| CN106100344A (en) * | 2016-07-05 | 2016-11-09 | 陕西科技大学 | A kind of LLC resonant converter with liter high voltage gain |
| WO2017049179A1 (en) * | 2015-09-18 | 2017-03-23 | Murata Manufacturing Co., Ltd. | Converters with hold-up operation |
-
2018
- 2018-07-09 CN CN201810744843.0A patent/CN108923658B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013106692A1 (en) * | 2012-01-13 | 2013-07-18 | Power-One, Inc. | Resonant converter with auxiliary resonant components and holdup time control circuitry |
| WO2013166579A1 (en) * | 2012-05-10 | 2013-11-14 | Arda Power Inc. | Dc-dc converter circuit using an llc circuit in the region of voltage gain above unity |
| CN104756385A (en) * | 2012-10-31 | 2015-07-01 | 麻省理工学院 | Systems and methods for a variable frequency multiplier power converter |
| WO2015136097A1 (en) * | 2014-03-14 | 2015-09-17 | Eisergy Limited | A switched mode ac-dc converter |
| WO2017049179A1 (en) * | 2015-09-18 | 2017-03-23 | Murata Manufacturing Co., Ltd. | Converters with hold-up operation |
| CN106100344A (en) * | 2016-07-05 | 2016-11-09 | 陕西科技大学 | A kind of LLC resonant converter with liter high voltage gain |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108923658B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2016146000A1 (en) | High-frequency isolation alternating current-direct current conversion circuit and control method thereof | |
| CN101527520B (en) | Single-stage single-phase AC-DC convertor based on LLC series resonance | |
| CN107493015B (en) | A kind of two-way DC converter and its Poewr control method of dual transformer structure | |
| CN101902129B (en) | Current-type multi-resonance direct current (DC) converter | |
| CN110224612A (en) | Asymmetrical half-bridge converter and control method | |
| CN109560711A (en) | A kind of isolation type bidirectional DC-DC converter and its modulator approach | |
| CN108988451A (en) | Isolation type bidirectional charger control method and control circuit | |
| CN109217681A (en) | A kind of two-way resonance converter | |
| CN105846696B (en) | A kind of two-stage type AC-DC converter and its control method | |
| CN103595260A (en) | Push-pull - flexible switching converter with serial-connected resonance unit | |
| CN206250979U (en) | A kind of quasi-resonance active-clamp flyback converter | |
| CN112234835B (en) | Variable structure combined LLC resonant converter | |
| CN205847105U (en) | A kind of three level frequency multiplication LLC resonant transformation devices | |
| CN104852590B (en) | A kind of new three-level LLC resonance inverter | |
| CN108235509B (en) | A kind of single-stage LED drive circuit of integrated decompression Cuk and LLC circuit | |
| CN211127590U (en) | Phase-shifted full-bridge zero-voltage zero-current soft switching DC-DC converter | |
| CN110233575A (en) | Five element resonance networks of one kind and converter | |
| CN108900097A (en) | A kind of controlled resonant converter | |
| CN103887981A (en) | Full-bridge DC-DC converter | |
| CN104901550B (en) | A kind of bridge DC/DC converters of enjoying a double blessing based on variable inductance network | |
| CN108631604A (en) | A kind of environmental protection dual transformer type zero current resonance three-level DC converter | |
| CN106026665B (en) | A kind of novel three level frequency multiplication LLC resonant converter | |
| CN107482922A (en) | A kind of two-way LLC resonant converter based on switching switch | |
| CN100571006C (en) | Superconducting energy storage bidirectional three-level soft switch DC/DC converter and control method thereof | |
| CN106026676A (en) | Double-transformer full-bridge conversion device |
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 |