CN106160491A - Wide-voltage range High-current output DC/DC changer - Google Patents
Wide-voltage range High-current output DC/DC changer Download PDFInfo
- Publication number
- CN106160491A CN106160491A CN201610527743.3A CN201610527743A CN106160491A CN 106160491 A CN106160491 A CN 106160491A CN 201610527743 A CN201610527743 A CN 201610527743A CN 106160491 A CN106160491 A CN 106160491A
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- circuit
- llc
- voltage
- rear class
- changer
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- 230000005611 electricity Effects 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 101100412102 Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) rec2 gene Proteins 0.000 description 1
- 101100356020 Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) recA gene Proteins 0.000 description 1
- 101100042680 Mus musculus Slc7a1 gene Proteins 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- 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)
Abstract
The present invention relates to power electronics transformation of electrical energy circuit, it is desirable to provide a kind of wide-voltage range High-current output DC/DC changer.This changer includes prime non-isolation DC DC circuit and rear class isolated form LLC resonance DC DC circuit；The latter has biphase identical circuit structure, and the high input voltage side of this biphase LLC resonance DC DC circuit is series connection, and its low pressure outlet side is in parallel.The rear class of the present invention uses resonant type soft-switch LLC topology, reduces switching loss, improves switching frequency and efficiency.Biphase LLC uses the misphase of unified frequency to control, it is possible to obtain the negative function of outlet side current ripples.The structure of input series and output parallel combines same FREQUENCY CONTROL, all pressures of natural acquisition input side.Input uses boost booster circuit, it is to avoid the too low rear class LLC input side current stress caused of intermediate-bus voltage is high, and efficiency reduces.Prime uses Boost circuit, and intermediate bus bar not only voltage is higher, also can obtain preferable range of regulation.
Description
Technical field
The present invention relates to a kind of power electronics transformation of electrical energy circuit, particularly relate to one and meet wide input voltage range simultaneously
With wide output voltage range and the DC/DC changer of output larger current.
Background technology
Electronic or hybrid-electric car inside auxiliary equipment power needs one DC/DC changer, this changer from
High voltage power battery is transformed into low pressure (12V or 24V) battery system.Owing to input and the output of this DC/DC changer are all
Battery, therefore its voltage range is wider.Typically entering the maximum ratio with minimum voltage in side close to 2, outlet side there is also similar
Wide-voltage range.The electric current of outlet side is relatively big, typically can be at more than 150A.Wide input, output voltage range and big defeated
Going out electric current, design and optimization to this changer bring difficulty.And owing to the miniaturization of mobile unit and lightweight are to carry
The demand of high vehicle flying power, the performance such as the high power density of changer and high efficiency is particularly important.
Existing automobile-used auxiliary DC/DC power supply product typically uses primary structure, it is achieved turning of high pressure to low-voltage, high-current
Change.As it is shown in figure 1, figure is a traditional LLC connection in series-parallel hybrid resonant DC-DC topological realization high input voltage exports to low pressure
Conversion, and the zero current cut-off of the Zero-voltage soft switch of high side switch pipe and low-voltage rectifier tube can be realized, reduce and close
Breakdown consumes, it is achieved high frequency conversion, improves efficiency and power density.
But, owing in automotive applications, input voltage and output voltage range are the widest so that LLC resonant converter
The efficiency optimization of resonance magnetic cell and transformator is extremely difficult, obtains high conversion while being difficult to meet Width funtion gain ranging
Efficiency, it is therefore desirable to use two-layer configuration.As in figure 2 it is shown, the DC-DC that prime is not isolated realizes the voltage stabilizing of intermediate bus bar so that
The voltage range of rear class isolated form LLC resonance DC-DC reduces, and alleviates resonant element and the difficulty of transformer parameter optimization.And then
Switching frequency can be improved, and optimize whole efficiency.The DC-DC of prime non-isolated can be booster type Boost circuit or
Buck type circuit (Fig. 3).
The output current ripple of LLC changer is very big, especially more problematic when low-voltage, high-current exports, and needs
A large amount of output filter capacitors could reduce output voltage ripple.And the element of vehicle-mounted current transformer will meet vehicular grade, price
Costliness, therefore its cost can be the highest, and size is big, is unfavorable for the raising of power density.And biphase LLC changer staggered also
Connection needs the Synchronization Control of frequency, but owing to LLC converter frequency regulates characteristic and the discreteness of resonant parameter of gain, frequently
Rate cannot keep the voltage gain of heterogeneous LLC changer unanimously when synchronizing, thus cannot be directly in parallel.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, it is provided that a kind of big electricity of wide-voltage range
Stream output DC/DC changer.
In order to solve technical problem, the solution of the present invention is:
There is provided a kind of wide-voltage range High-current output DC/DC changer, including prime non-isolated DC-DC circuit and rear class
Isolated form LLC resonance DC-DC circuit；It is characterized in that, described rear class isolated form LLC resonance DC-DC circuit has biphase identical
Circuit structure, and the high input voltage side of this biphase LLC resonance DC-DC circuit for series connection, its low pressure outlet side be then parallel connection.
In the present invention, the biphase LLC resonance DC-DC circuit in described rear class isolated form LLC resonance DC-DC circuit connects simultaneously
It is connected to two staggered LLC controller；This two staggered LLC controller includes error amplifier, the voltage-frequency control being sequentially connected
Device processed and misphase controller；Wherein, error amplifier is connected to the outfan of rear class isolated form LLC resonance DC-DC circuit, carries out electricity
Pressure sampling；Misphase controller output two complementary drive signals to 90 ° of angles of misphase, drive biphase LLC resonance DC-DC electricity respectively
The switching tube of the primary side switch brachium pontis on road.
In the present invention, the DC-DC circuit of described prime non-isolated is connected with its controller, and this controller is sampled prime simultaneously
Non-isolated DC-DC circuit and the outlet side voltage of rear class isolated form LLC resonance DC-DC circuit, and by regulation controller certainly
The dutycycle of body regulates the output voltage of prime non-isolated DC-DC circuit.
In the present invention, the DC-DC circuit of described prime non-isolated is booster type Boost circuit or Buck type circuit.
In the present invention, described rear class isolated form LLC resonance DC-DC circuit be isolated form LLC half-bridge resonance DC-DC circuit or
Isolated form LLC full-bridge resonance DC-DC circuit (and related variation based on this LLC resonance).
Compared with prior art, the invention has the beneficial effects as follows:
1, rear class uses resonant type soft-switch LLC topology, reduces switching loss, improves switching frequency and efficiency.
2, biphase LLC uses the misphase of unified frequency to control, it is possible to obtain the negative function of outlet side current ripples.
3, the structure of input series and output parallel combines same FREQUENCY CONTROL, all pressures of natural acquisition input side.
4, input uses boost booster circuit, it is to avoid the too low rear class LLC input side electricity caused of intermediate-bus voltage
Stream stress is high, and efficiency reduces.
5, prime uses Boost circuit, and intermediate bus bar not only voltage is higher, also can obtain preferable range of regulation.
6, followed the ratio control of output voltage by intermediate-bus voltage, reduce the gain ranging of rear class LLC, it is simple to
Optimize magnetic cell and the resonant element of rear class LLC, improve efficiency.
Accompanying drawing explanation
Fig. 1 is LLC resonant type soft-switch DC/DC changer；
Fig. 2 is the 2 stage converter of Boost cascade LLC resonance DC/DC；
Fig. 3 is the 2 stage converter of Buck cascade LLC resonance DC/DC；
Fig. 4 is the two-stage topology of the LLC outlet side crisscross parallel of the present invention；
Fig. 5 is the crisscross parallel neutralization effect to LLC Topology Output Current ripple；
Fig. 6 is the crisscross parallel control process signal that series connection inputs biphase LLC；
Fig. 7 is that the intermediate-bus voltage of circuit of the present invention controls process signal；
Fig. 8 is biphase crisscross parallel half-bridge LLC circuit and the signal of control process thereof of two-layer configuration；
Fig. 9 is biphase crisscross parallel full-bridge LLC circuit and the signal of control process thereof of two-layer configuration.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
The wide-voltage range High-current output DC/DC changer of the present invention, including prime non-isolated DC-DC circuit and rear class
Isolated form LLC resonance DC-DC circuit, wherein, rear class isolated form LLC resonance DC-DC circuit has biphase identical circuit structure.
Being connected in the high input voltage side of biphase LLC by the present invention, and carries out parallel connection at low pressure outlet side, as shown in Figure 4.Due to series connection input
Structure ensure that at switching frequency stable, therefore, it is possible to preferably realize defeated with dutycycle input side voltage gain time consistent
Enter the Pressure and Control strategy from the input voltage all pressed and need not be extra of side.Owing to the input side of LLC is connected, need higher
Voltage can reduce input side current stress, and preceding stage DC-DC circuit the most just can be utilized to boost, and also permissible
Make intermediate-bus voltage have certain range of accommodation, meet the need of input voltage output voltage the to be followed change of rear class LLC
Ask.And it is possible to utilize the LLC topology of Parallel opertation to carry out Interleaved control so that it is the current ripples of biphase output is offset, reduce
The current ripples of outlet side, the design sketch offset for ripple current in Fig. 5.
In order to improve switching frequency and the efficiency of rear class isolated form DC-DC, the switch operating frequency of LLC topology is controlled
Near series resonance frequency.But the switching frequency of fixing LLC or limit switch frequency cause voltage to increase near resonance point
Beneficial is unadjustable, and automobile auxiliary D/C power needs to meet wide input and wide output voltage range, it is therefore desirable to front
The output voltage range of level non-isolated boost DC-DC can be adjusted according to the voltage of last outlet side, thus without wide model
Enclose gain and the switching frequency of regulation LLC, to solve the problem that LLC control strategy can not significantly regulate output voltage.
In order to obtain the crisscross parallel effect of rear class LLC, in Fig. 6, the control signal of the LLC of rear class input series connection is from same
One controller.The output voltage Vo of controller sampling compares with output voltage benchmark Voref, obtains the output of error amplifier
Verr, then the switching frequency fs of LLC is obtained by voltage-frequency controller.Then two pairs of misphase an angle of 90 degrees are obtained by misphase controller
The complementary drive signals of degree, drives the switching tube of the primary side switch brachium pontis of biphase LLC respectively.Ignore the dead band of complementary control signal
Time, the dutycycle of every pair of complementary control signal is 50%.Thus obtain the effect of crisscross parallel, offset biphase LLC input, defeated
Go out the ripple of electric current, reduce filter size.Use unified output voltage control logic, can the series connection of natural acquisition input side
Certainly the equilibrium of voltage.
In order to reduce the gain-adjusted scope of rear class LLC, can be by regulating the output voltage of prime Boost circuit
(Vbus), it is thus achieved that intermediate bus bar Vbus is along with the effect of output voltage Vo linear change, as shown in Figure 7.Boost controller is simultaneously
Sampling and outputting voltage and intermediate-bus voltage, so regulation boost dutycycle regulate Vbus voltage.This Boost controller
Can be analog device, it is also possible to be digital implementation.By simulation or the algorithm of numeral, make Vbus in certain proportion
Coefficient k is followed Vo and is carried out linear regulation, and the signal that this algorithm finally produces enters dutycycle generation circuit, obtains boost circuit
Control dutycycle, regulate the voltage of Vbus.
As a example by half-bridge LLC topology in Fig. 8, the crisscross parallel control mode of biphase crisscross parallel LLC is described.Staggered
LLC controls first pair of control signal G11 sending and G12 drives former limit half-bridge brachium pontis switching tube Q11 and Q12 of the first phase respectively
Gate pole.Second pair of control signal G21 and G22 that staggered LLC control sends drive the former limit half-bridge brachium pontis of the second phase to open respectively
Close the gate pole of pipe Q21 and Q22.The dutycycle of every a pair control signal is 50%, misphase 90 degree between two pairs of signals.LLC secondary
Rectification circuit Rec1 and Rec2 can be diode rectification, can also use lock-in tube rectification to reduce conduction loss.
For high-power applications, biphase LLC full-bridge circuit can be used to carry out crisscross parallel, it is possible to obtain same effect
(as shown in Figure 9).Except that, LLC former limit half-bridge structure makes full bridge structure into, i.e. two switch brachium pontis.The bridge increased
Arm be Q13 and Q14 composition brachium pontis and Q23 and Q24 composition brachium pontis.The brachium pontis midpoint increased is connected respectively to corresponding LLC phase
One end of capacity cell Cr1 and Cr2 in the resonator cavity of number.Remaining connected mode is constant.
Finally, in addition it is also necessary to be only several specific embodiments of the present invention it is noted that listed above.Obviously, this
Bright it is not limited to above example, it is also possible to have many deformation.Those of ordinary skill in the art can be from present disclosure
The all deformation directly derived or associate, are all considered as protection scope of the present invention.
Claims (5)
1. a wide-voltage range High-current output DC/DC changer, including prime non-isolated DC-DC circuit and rear class isolated form
LLC resonance DC-DC circuit；It is characterized in that, described rear class isolated form LLC resonance DC-DC circuit has biphase identical circuit
Structure, and the high input voltage side of this biphase LLC resonance DC-DC circuit is for connecting, its low pressure outlet side is in parallel.
DC/DC changer the most according to claim 1, it is characterised in that described rear class isolated form LLC resonance DC-DC electricity
Biphase LLC resonance DC-DC circuit in road is connected simultaneously to two staggered LLC controller；This two staggered LLC controller
Including the error amplifier being sequentially connected, voltage-frequency controller and misphase controller；Wherein, error amplifier is connected to rear class isolated form
The outfan of LLC resonance DC-DC circuit, carries out voltage sample；Misphase controller output two complementary drive to 90 ° of angles of misphase
Signal, drives the switching tube of the primary side switch brachium pontis of biphase LLC resonance DC-DC circuit respectively.
DC/DC changer the most according to claim 1 and 2, it is characterised in that the DC-DC circuit of described prime non-isolated
Being connected with its controller, this controller is sampled prime non-isolated DC-DC circuit and rear class isolated form LLC resonance DC-DC simultaneously
The outlet side voltage of circuit, and the output of prime non-isolated DC-DC circuit is regulated by the dutycycle of regulation controller self
Voltage.
DC/DC changer the most according to claim 1, it is characterised in that the DC-DC circuit of described prime non-isolated is to rise
Die mould Boost circuit or Buck type circuit.
DC/DC changer the most according to claim 1, it is characterised in that described rear class isolated form LLC resonance DC-DC electricity
Road is isolated form LLC half-bridge resonance DC-DC circuit or isolated form LLC full-bridge resonance DC-DC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610527743.3A CN106160491A (en) | 2016-06-30 | 2016-06-30 | Wide-voltage range High-current output DC/DC changer |
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| CN201610527743.3A CN106160491A (en) | 2016-06-30 | 2016-06-30 | Wide-voltage range High-current output DC/DC changer |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395014A (en) * | 2017-08-04 | 2017-11-24 | 华为技术有限公司 | Power supply circuit, electronic building brick, mobile phone terminal and method for controlling power supply |
| CN107404228A (en) * | 2017-09-14 | 2017-11-28 | 上海英联电子系统有限公司 | A kind of novel wide scope input power translation circuit |
| CN107944178A (en) * | 2017-12-08 | 2018-04-20 | 国网河北省电力有限公司电力科学研究院 | A kind of simulation accelerating model of modularization DC/DC converters |
| CN107947588A (en) * | 2017-12-05 | 2018-04-20 | 南京航空航天大学 | With the ISOP systems and its control method for pressing characteristic naturally |
| CN108683335A (en) * | 2018-03-16 | 2018-10-19 | 福州大学 | A kind of staggeredly Buck and the full-bridge circuit of one circle control strategy |
| CN109327023A (en) * | 2017-07-31 | 2019-02-12 | 许继集团有限公司 | A kind of DC/DC parallel running output adjusting method and its system |
| CN109347331A (en) * | 2018-12-05 | 2019-02-15 | 深圳市英可瑞科技股份有限公司 | A kind of tri-level switch power-supply system and its bus voltage eqaulation control method |
| CN109510460A (en) * | 2019-01-11 | 2019-03-22 | 深圳戴普森新能源技术有限公司 | Microwave oven supply power circuit and micro-wave oven |
| CN110071637A (en) * | 2018-01-22 | 2019-07-30 | 深圳英飞源技术有限公司 | A kind of power supply of wide output voltage range |
| CN110311550A (en) * | 2019-07-24 | 2019-10-08 | 南通大学 | A kind of two module I SOP straight convertor pressure equalizing control methods |
| CN110768531A (en) * | 2018-07-27 | 2020-02-07 | 株洲中车时代电气股份有限公司 | Bidirectional high-frequency isolation type DC/DC module |
| CN111404384A (en) * | 2020-03-13 | 2020-07-10 | 深圳第三代半导体研究院 | Multi-stage parallel DC-DC converter |
| WO2020191578A1 (en) * | 2019-03-25 | 2020-10-01 | 西门子股份公司 | Dc-dc converter |
| CN112117909A (en) * | 2020-08-24 | 2020-12-22 | 北京机械设备研究所 | Closed-loop control method of Buck + LLC cascade topology |
| CN112803774A (en) * | 2019-11-14 | 2021-05-14 | 华为技术有限公司 | DC-DC conversion circuit, DC-DC converter, control method thereof and related equipment |
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| WO2022241625A1 (en) * | 2021-05-17 | 2022-11-24 | 华为技术有限公司 | Power supply circuit and terminal device |
| CN116436298A (en) * | 2023-06-12 | 2023-07-14 | 广汽埃安新能源汽车股份有限公司 | Direct current converter circuit and electric vehicle |
| JP7575590B2 (ja) | 2020-10-13 | 2024-10-29 | ビーワイディー カンパニー リミテッド | 充電装置及び車両 |
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| CN109327023A (en) * | 2017-07-31 | 2019-02-12 | 许继集团有限公司 | A kind of DC/DC parallel running output adjusting method and its system |
| CN109327023B (en) * | 2017-07-31 | 2021-06-08 | 许继集团有限公司 | DC/DC parallel operation output adjusting method and system thereof |
| CN107395014A (en) * | 2017-08-04 | 2017-11-24 | 华为技术有限公司 | Power supply circuit, electronic building brick, mobile phone terminal and method for controlling power supply |
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| CN107947588A (en) * | 2017-12-05 | 2018-04-20 | 南京航空航天大学 | With the ISOP systems and its control method for pressing characteristic naturally |
| CN107944178A (en) * | 2017-12-08 | 2018-04-20 | 国网河北省电力有限公司电力科学研究院 | A kind of simulation accelerating model of modularization DC/DC converters |
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| CN110071637A (en) * | 2018-01-22 | 2019-07-30 | 深圳英飞源技术有限公司 | A kind of power supply of wide output voltage range |
| CN108683335B (en) * | 2018-03-16 | 2020-04-10 | 福州大学 | Staggered Buck and full-bridge circuit of single-cycle control strategy |
| CN108683335A (en) * | 2018-03-16 | 2018-10-19 | 福州大学 | A kind of staggeredly Buck and the full-bridge circuit of one circle control strategy |
| CN110768531A (en) * | 2018-07-27 | 2020-02-07 | 株洲中车时代电气股份有限公司 | Bidirectional high-frequency isolation type DC/DC module |
| CN109347331A (en) * | 2018-12-05 | 2019-02-15 | 深圳市英可瑞科技股份有限公司 | A kind of tri-level switch power-supply system and its bus voltage eqaulation control method |
| CN109510460B (en) * | 2019-01-11 | 2024-02-09 | 深圳戴普森新能源技术有限公司 | Microwave oven power supply circuit and microwave oven |
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| CN112803774B (en) * | 2019-11-14 | 2023-01-13 | 华为数字能源技术有限公司 | DC-DC conversion circuit, DC-DC converter, control method thereof and related equipment |
| CN112803774A (en) * | 2019-11-14 | 2021-05-14 | 华为技术有限公司 | DC-DC conversion circuit, DC-DC converter, control method thereof and related equipment |
| CN111404384A (en) * | 2020-03-13 | 2020-07-10 | 深圳第三代半导体研究院 | Multi-stage parallel DC-DC converter |
| CN112117909A (en) * | 2020-08-24 | 2020-12-22 | 北京机械设备研究所 | Closed-loop control method of Buck + LLC cascade topology |
| WO2022078121A1 (en) * | 2020-10-13 | 2022-04-21 | 比亚迪股份有限公司 | Charging device and vehicle |
| JP7575590B2 (ja) | 2020-10-13 | 2024-10-29 | ビーワイディー カンパニー リミテッド | 充電装置及び車両 |
| WO2022241625A1 (en) * | 2021-05-17 | 2022-11-24 | 华为技术有限公司 | Power supply circuit and terminal device |
| CN116436298A (en) * | 2023-06-12 | 2023-07-14 | 广汽埃安新能源汽车股份有限公司 | Direct current converter circuit and electric vehicle |
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