CN109196768A - AC-DC power adapter and method for the power adapter - Google Patents
AC-DC power adapter and method for the power adapter Download PDFInfo
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- CN109196768A CN109196768A CN201680086262.1A CN201680086262A CN109196768A CN 109196768 A CN109196768 A CN 109196768A CN 201680086262 A CN201680086262 A CN 201680086262A CN 109196768 A CN109196768 A CN 109196768A
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- conversion circuit
- bridge
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
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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
- 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
-
- 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
-
- 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
- H02M1/0077—Plural converter units whose outputs are connected in series
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Method the present invention provides AC-DC power adapter and for operating the AC-DC power adapter.AC-DC power adapter includes: the AC-DC conversion circuit with the first controllable power switch, is configured to receive the first AC power supplies and exports the first DC power supply generated from the first AC power supplies；Multiple DC-DC conversion circuits, each of the multiple DC-DC conversion circuit has the intermediate conversion to the second AC power supplies, the multiple DC-DC conversion circuit is configured to receive the first DC power supply and combines the output of the second DC power supply, wherein, each of the multiple DC-DC conversion circuit includes the full-bridge DC-AC conversion circuit with the second controllable power switch, its side DC is coupled across the output of AC-DC conversion circuit, is inserted into capacity cell between the both ends of its side AC；And controller, it is configured to: generating the first control signal for switching on and off the first controllable power switch of AC-DC conversion circuit, the D/C voltage of the first DC power supply is adjusted in DC voltage range；And generate multiple second control signals, each of the multiple second control signal is used to switch on and off the second controllable power switch of the corresponding full-bridge DC-AC conversion circuit of multiple DC-DC conversion circuits under full-bridge mode and half-bridge mode, so that multilevel voltage gain is presented in multiple DC-DC conversion circuits；Wherein: the voltage that the DC voltage range of AC-DC conversion circuit is set to two continuous grades of covering voltage gain increases.
Description
Technical field
It the present invention relates to the use of direct DC-DC power source conversion and AC power supplies input be converted into DC power supply output, and more
More particularly to the direct DC-DC conversion equipment for parallel operation.
Background technique
In numerous applications, power adapter needs operate in wide input or output voltage range.In input voltage
There is compromise between range or output voltage range and transfer efficiency.It is grasped in wide input voltage range or output voltage range
The power adapter of work shows bigger efficiency decline than the corresponding person of their close limit.For given input voltage,
The power adapter of most conventional only can ensure high efficiency in narrow output voltage range.This is because power adapter
Design is commonly known as single operation point or the operating area that narrows.Therefore, when far from design point or region operation converter and portion
When part, loss and stress across converter and component will be will increase.The problem is particularly acute in the application of wide-voltage range, than
Electric vehicle DC quick charger such as now, for example, its output voltage range is usually even reached in 200V to 550V in China
750V。
For example, a kind of AC-DC power adapter of the 8th, 300, No. 438 U.S. Patent Publication, turns with three-phase voltage increasing
Parallel operation and buck converter, three-phase voltage increasing converter and buck converter be connected in parallel with corresponding three-phase input and with it is corresponding
Three-phase output is connected in series.Power adapter has first control circuit and second control circuit, first control circuit and second
Control circuit with 0% duty cycle operation three-phase voltage increasing converter, is converted respectively with 100% duty cycle operation three-phase step-down
Device, so that phase A, B and C boosting duty ratio and phase A, B and C decompression duty ratio approximation are defined by scheduled formula, in the formula,
The phase angle of three-phase sine wave voltage is used as variable.This helps to provide higher efficiency, because the duty ratio of every phase is limited
It is continuous in the AC period of one third.However, when 0% boost converter and 100% buck converter all operate, output
Voltage be not conditioned but linearly with the size of input voltage.As a result, the power adapter increases because of its linear voltage
Benefit and by relatively narrow output voltage range under given input voltage.Therefore, this power adapter is unsuitable for phase
Application to wide output voltage range.
Summary of the invention
According to an aspect of the invention, there is provided a kind of AC-DC power adapter, comprising: have the first controllable electric power
The AC-DC conversion circuit of switch, AC-DC conversion circuit are configured to receive the first AC power supplies and export to generate from the first AC power supplies
First DC power supply；Multiple DC-DC conversion circuits, each of the multiple DC-DC conversion circuit have to the second AC power supplies
Intermediate conversion, the multiple DC-DC conversion circuit be configured to receive the first DC power supply and combine the second DC power supply output.Its
In, each of the multiple DC-DC conversion circuit includes the full-bridge DC-AC conversion electricity with the second controllable power switch
Road makes its side DC be coupled across the output of AC-DC conversion circuit, and is inserted into capacity cell between the both ends of its side AC；
And controller, controller are configured to: generating the of the first controllable power switch for switching on and off AC-DC conversion circuit
One control signal, enables the D/C voltage of the first DC power supply to adjust in DC voltage range；And generate multiple second controls
Signal, each of the multiple second control signal are multiple for switching on and off under full-bridge mode and half-bridge mode
Second controllable power switch of the corresponding full-bridge DC-AC conversion circuit of DC-DC conversion circuit, so that multiple DC-DC conversion electricity
Multilevel voltage gain is presented in road；Wherein: the DC voltage range of AC-DC conversion circuit is set to two companies of covering voltage gain
The voltage of continuous grade increases.
According to another aspect of the present invention, a kind of method for operating AC-DC power adapter, this method packet are provided
It includes: generating first DC power supply with regulated DC voltage range from the first AC power supplies；And DC- of the combination from the first DC power supply
DC power supply conversion multiple outputs and generate the second DC power supply, wherein each of multiple DC-DC power source conversions have passes through
Capacity cell is converted to the intermediate power supplies of the second AC power supplies, and is implemented under full-bridge mode or half-bridge mode so that multiple DC-
Multilevel voltage gain is presented in DC power supply conversion；Wherein: DC voltage range is adjusted to two continuous grades of covering voltage gain
Voltage increases.
For needing the electric vehicle DC quick charger of the application of relatively wide voltage range such as now, in order in wide electricity
It presses and keeps power-efficient high in range, multiple DC-DC conversion circuits are linked in its input terminal parallel connection, and any DC-DC is converted
Circuit is required to undertake the responsibility of portion voltage adjusting, while all DC-DC conversion circuits operate all at its design point with true
Protect high efficiency.AC-DC conversion circuit can be adjusted by controller (such as by change its switch duty ratio), so as to supply from
More low side point is increased continuously to the DC output voltage of more high point.Between two adjacent discrete levels therefore, (such as HO and HH it
Between, between HH and FH, between FO and FH and between FH and FF) voltage gap the DC of AC-DC conversion circuit can be exported
Voltage continuously bridges tuning.
Preferably, under full-bridge mode, second in the first branch and second branch of full-bridge DC-AC conversion circuit is controllable
Each of power switch is with essentially identical duty ratio and essentially identical switching frequency operation；And in half-bridge mode
Under, each of second controllable power switch in the first branch is with essentially identical duty ratio and essentially identical switching frequency
Rate operation, and second controllable power switch in the second controllable power switch in second branch is continuously switched on, second
Another second controllable power switch in branch continuously disconnects.
Preferably, the output end series coupled of DC-DC conversion circuit.Multiple possible step voltage gains can be obtained, thus
Show the multilevel voltage gain of DC-DC conversion circuit.Since DC-DC conversion circuit has multiple fix level voltage gains,
DC output voltage is adjusted by changing DC input voltage, which is the output voltage of AC-DC conversion circuit.
Preferably, resonant inductance element and capacity cell series coupled, so that full-bridge DC-AC conversion circuit is in full-bridge mode
With all operated under half-bridge mode with ZVS.It does not need complicated control, this helps to reduce cost and easy to implement.Work as DC-
When DC conversion circuit is operated far from design point, the efficiency of DC-DC conversion circuit be may be degraded, and use Sofe Switch especially for those
The circuit of technology.This Sofe Switch DC-DC conversion circuit for example including the resonant inductance element L with capacity cell C series coupled,
So that full-bridge DC-AC conversion circuit is all operated under full-bridge mode and half-bridge mode with ZVS.The switching frequency of each LLC converter
Rate is input voltage, output voltage and the function for exporting electric current.In general, switching frequency both increases with the increase of input voltage
Also with output voltage and exports the reduction of electric current and increase.The result is that more heat will be generated, and need stronger/bigger
Cooling system, this leads to higher cost.DC-DC conversion circuit according to the present invention always has fixed switching frequency and perseverance
Determine to operate at the design point of duty ratio, to ensure relatively low loss and to ensure between different output voltages and electric current
Relatively easily implement.By the way that converter is changed into half-bridge configuration mode, the voltage gain of converter from full bridge configuration mode
Half can be reduced, vice versa.Therefore, it is possible to reduce the demand to cooling system.In short, the solution proposed can be with
Lower cost and higher efficiency are realized than the solution of the prior art.
Detailed description of the invention
Subject of the present invention is carried out hereinafter with reference to preferred illustrative embodiment shown in the accompanying drawings more detailed
Ground explanation, in the accompanying drawings:
Fig. 1 shows the AC-DC power adapter of embodiment according to the present invention, as shown in the figure；And
Fig. 2A, Fig. 2 B and Fig. 2 C show the full-bridge mould of the full-bridge DC-AC conversion circuit of embodiment according to the present invention
Transition between formula and half-bridge mode.
Appended drawing reference and its meaning used in attached drawing are listed in summary form in reference signs list.In principle, phase
Same component appended drawing reference having the same in figure.
Specific embodiment
Fig. 1 shows the AC-DC power adapter of embodiment according to the present invention.As shown in Figure 1, AC-DC power supply turns
Parallel operation 1 includes AC-DC conversion circuit 10, multiple DC-DC conversion circuits 11 and controller 12.
AC-DC conversion circuit 10 is configured to receive the first AC power supplies FA and exports the first DC generated from the first AC power supplies FA
Power supply FD.First AC power supplies FA can be supplied at AC voltage Vin from external AC electrical power source.In this embodiment, AC-DC is converted
Circuit 10 can be single-phase or three-phase the controlled rectifier with the first controllable power switch.For example, AC-DC conversion circuit 10
It can be the three-phase with first controllable power switch S11, S12, S13, S14 for each arm in six arms of bridgeware
Bridge rectifier, such as thyristor.Its angle of extinction can be adjusted by the way that the control signal from controller 12 is adjusted.
Therefore, AC-DC conversion circuit 10 can provide the first DC power supply FD at variable DC output voltage Vdc.AC-DC conversion circuit 10
The parallel connection of the side DC be coupled across the sides DC of multiple DC-DC conversion circuits 11.In this embodiment, DC-DC conversion circuit 11
Quantity be two, and it will be apparent to a skilled person that more than two DC-DC conversion circuits 11 can be applied.
Each of DC-DC conversion circuit 11 has the intermediate conversion to the second AC power supplies SA.Particularly, DC-DC turns
Circuit 11 is changed with DC-AC grades, transformer and AC-DC grades, and the second AC power supplies SA is exported from DC-AC grades, is rendered as DC-
Power flow in DC conversion circuit 11.DC-DC conversion circuit 11 is configured to receive the first DC power supply FD and in DC output voltage Udc
Place's combination the second DC power supply SD output, this will be described in detail later.Each of DC-DC conversion circuit 11 includes having the
The full-bridge DC-AC conversion circuit 110 (DC-AC grades) of two controllable power switch S21, S22, S23, S24, and full-bridge DC-AC turns
The side DC for changing circuit 110 is coupled across the output end of AC-DC conversion circuit 10.DC-AC conversion circuit 110 is included in its side AC
Both ends between the capacity cell C that is inserted into.In this embodiment, capacity cell C is coupled in series to DC-DC conversion circuit 11
The armature winding PW of transformer 111, and DC-AC conversion circuit 110 the side AC bridging connected in series link capacity cell C and
The armature winding PW of transformer 111.Its multiple output for being configured to combine the DC-DC power source conversion from the first DC power supply and produce
Raw second DC power supply, wherein each of multiple DC-DC power source conversions have through capacity cell into the second AC power supplies
Between power supply convert, and implemented with full-bridge mode or half-bridge mode, so that multiple DC-DC power source conversions show multilevel voltage increasing
Benefit.
Controller 12 is configured to generate of the first controllable power switch for switching on and off AC-DC conversion circuit 10
One control signal and the multiple second control signals of generation, each of the multiple second control signal is for switching on and off
Second controllable power switch of the corresponding full-bridge DC-AC conversion circuit 110 of DC-DC conversion circuit 11.As a result, AC-DC turns
The DC output voltage for changing circuit 10 can be adjusted by changing first control signal, and full-bridge DC-AC conversion circuit 110
AC output voltage can be adjusted by changing second control signal, and can also be can be adjusted and be transferred because of rectifier 112
The DC output voltage Udc of DC-DC conversion circuit 11 is adjusted.
Fig. 2A, Fig. 2 B and Fig. 2 C show the full-bridge mould of the full-bridge DC-AC conversion circuit of embodiment according to the present invention
Transition between formula and half-bridge mode.Fig. 2A is shown with the circuit diagram of the full-bridge DC-AC conversion circuit of full-bridge mode operation.
As shown in Figure 2 A, under full-bridge mode, controller 12 can send second control signal, so as in a complementary fashion
Switch the second controllable power switch S21 and S23 and the second controllable power switch S22 and S24 simultaneously.As a result, second is controllable
Each of power switch S21, S23, S22 and S24 can be operated with the switching frequency of 50% duty ratio and 20kHz, such as
Shown in Fig. 2 C.Under full-bridge mode, the second controllable power switch S21 to S24 can be with the fixation switching frequency of 20kHz and 50%
Duty cycle operation.During transition, the second controllable power switch S21 and S22 continues to fix switching frequency and 50% duty
Than operating so that output valve is remained aspiration level, and PWM modulation by the duty ratio of switch S23 from 50% be increased monotonically to
100% and the duty ratio of switch S24 is decreased to 0% from 50% in a complementary fashion.The electric current I arrow flowed in switch
It indicates.Because switch S23 is permanently on and switch S24 is permanently disconnected, full-bridge DC-AC conversion circuit 110 is being opened during transition
Continue in the case where the fixed frequency control for closing S21 and switch S22 with Hall-bridge mode operation.
As shown in Figure 2 B, under half-bridge mode, controller 12 can send second control signal so as in a complementary fashion
Switch the second controllable power switch S21 and S22 of the first branch.In addition, each of they can with 50% duty ratio and
The operation of 20kHz switching frequency, as shown in Figure 2 C.The second controllable power switch in the second controllable power switch in second branch
One in S24 is continuously switched on, and another second controllable power switch S23 is continuously disconnected in second branch.However, other are synchronized
Method is also possible.For example, the second controllable power switch S22 can be synchronized with S24 for connecting, the second controllable power switch
S21 and S23 can be in turn-off time in the mid-ambles of turn-on time or the second controllable power switch S22 and S24
Mid-ambles.
In addition, full-bridge DC-AC conversion circuit 110 can operate under disconnection (OFF) mode, under Disconnected mode, pass through
Its second all controllable power switch S21-S24 is disconnected to realize control, each switch is with 0% duty cycle operation.
Second controllable power switch S21-S24 of the circuit of Fig. 2A and Fig. 2 B blocking voltage and two in one direction
A direction uploads electrical conduction current.In general, each of switch S21-S24 is implemented by second switch, which is to have instead
The controllable one-way electric power semiconductor switch of uncontrolled unidirectional current-carrying semiconductor in parallel, such as IGBT and MOSFET, knot
Structure includes the inverse parallel body diode for allowing bi-directional current flow.Therefore, full-bridge DC-AC conversion circuit 110 can be with full-bridge mould
Formula or half-bridge mode operation, depending on the second control signal provided by controller 12.For from half-bridge mode to full-bridge mode
Transition, switch S23 and switch the S24 quilt on the direction substantially opposite with the direction of the transition from full-bridge mode to half-bridge mode
Modulation, that is, the duty ratio of switch S23 is monotonously decreased to 50% from 100% (that is, being continuously switched on), meanwhile, switch S24's accounts for
Sky increases than in a complementary fashion from 0% (that is, continuous disconnect).
From the point of view of static analysis, under full-bridge mode, the average voltage of capacity cell C is zero.Accordingly, in half-bridge mode
Under, the average voltage of capacity cell is Vdc/2.In this embodiment, electric when using two DC-DC to convert in a system
When road 11, five kinds of different operation modes can be obtained.Five kinds of different operation modes are full syntype, complete half mode, half half
Mode, entirely disconnected mode and half disconnected mode.When two DC-DC conversion circuits 11 are in full-bridge mould to fix switching frequency and duty ratio
When formula operates, converter has combined voltage gain, M=1.Similarly, for the half-bridge mould of fixed switching frequency and duty ratio
Formula, voltage gain 0.5.When it is in Disconnected mode, voltage gain 0.Therefore, when the input of DC-DC conversion circuit 11
The output series coupled of the output dc voltage Vdc of bridging coupling AC-DC conversion circuit 10 and DC-DC conversion circuit 11 in parallel
When, 4 kinds of possible step voltage gains 2,1.5,1 and 0.5 can be obtained, the multilevel voltage gain of DC-DC conversion circuit 11 is showed.
Since DC-DC conversion circuit 11 has 4 fix level voltage gains, DC output voltage is adjusted by changing DC input voltage
Section, which is the output voltage of AC-DC conversion circuit 10.
In this embodiment, controller 12 can be by switching the first controllable power switch simultaneously in a complementary fashion
S11 and S13 and the first controllable power switch S12 and S14 exports to adjust the slave AC-DC conversion circuit 10 in DC voltage range
The first DC power supply FD D/C voltage Vdc, each switch is with the duty cycle operation of range from 0% to 100%.Alternatively, false
Determine AC-DC conversion circuit 10 and use half-bridge topology, it will be apparent to a skilled person that can be by suitably controlling it
The duty ratio of switch adjusts its output dc voltage Vdc.
The voltage that the DC voltage range of AC-DC conversion circuit 10 is set to two continuous grades of covering voltage gain increases
Add.Under the control of the controller 12, power supply conversion is adjusted by AC-DC conversion circuit 10, tunes its DC output voltage Vdc, the DC
Thus output voltage Vdc changes in relatively small range.It is fed to DC- to output-parallel from AC-DC conversion circuit 10
The input of DC conversion circuit 11 is converted by them and with fixing switching frequency and duty cycle operation in their serial chain respectively
The output end output connect.The voltage gain of each DC-DC conversion circuit 11 according to full-bridge mode, half-bridge mode or Disconnected mode and
Be it is transformable, allow the output voltage of DC-DC conversion circuit 11 between it with relatively large interval discrete electrical
It puts down and changes, show various voltage gains 0.5,1,1.5 and 2.It is assumed that AC-DC conversion circuit 10 is input to DC-DC conversion
The DC output voltage Vdc of circuit 11 keeps constant, and the gap between two continuous voltage gains is 0.5, this makes AC-DC
The output dc voltage Vo of converter 1 is discrete.As the DC output voltage Vdc of above method, AC-DC conversion circuit 10 can be by changing
Become its duty ratio to adjust, and therefore it is variable in DC voltage range [Vdc_1, Vdc_2], and two are held
The distribution of point, the output dc voltage Vo of AC-DC converter 1 is as shown in Table I:
Table I
It will be understood by those skilled in the art that AC-DC conversion circuit 10 can for example by change its switch duty ratio and
It is adjusted by controller 12, is increased continuously to supply from more low side point Vdc_1 to the DC output voltage Vdc of more high point Vdc_2.Cause
This, two adjacent discrete levels, such as the electricity between HO and HH, between HH and FH, between FO and FH and between FH and FF
Pressure gap, which can continuously bridge the DC output voltage Vdc of AC-DC conversion circuit 10 from Vdc_1, is tuned to Vdc_2, as long as
Vdc_2-Vdc_1 is greater than or equal to 0.5*Vdc_1.
By possessing AC-DC converter according to the present invention, just without complicated control, this help to reduce cost and
It is easy to implement.When far from design point operation DC-DC conversion circuit, its efficiency be may be degraded, and be used especially for those soft
The circuit of switching technique.The DC-DC conversion circuit of this Sofe Switch is for example including resonant inductance element L, resonant inductance element L
With capacity cell C series coupled so that full-bridge DC-AC conversion circuit is all operated under full-bridge mode and half-bridge mode with ZVS.Often
The switching frequency of a LLC converter is input voltage vin, output voltage Vo and the function for exporting electric current.In general, switching frequency was both
Increase the reduction also with output voltage and output electric current with the increase of input voltage and increases.As a result, will generate more
More heats, and stronger/bigger cooling system is needed, this leads to higher cost.DC-DC conversion electricity according to the present invention
Road always operates at the design point with fixed switching frequency and constant duty ratio, to ensure relatively low loss and to ensure
Relatively easily implement between different output voltages and electric current.For example, when DC-DC conversion circuit is LLC resonance topological,
DC-DC conversion circuit will switch near its resonance frequency always, switching loss can be kept minimum in entire wide output area
Change.By the way that converter is changed into half-bridge configuration mode from full bridge configuration mode, the voltage gain of converter can reduce half,
Vice versa.
Therefore, it is possible to reduce the demand to cooling system.In short, the solution proposed may be implemented to compare the prior art
The lower cost of solution and higher efficiency.For needing the electric vehicle DC of the application of opposite wide-voltage range such as now
Quick charger, in order to keep power-efficient high in wide-voltage range, multiple DC-DC conversion circuits are in its input terminal parallel connection chain
It connects, and any DC-DC conversion circuit requires to undertake the part responsibility of voltage adjusting, meanwhile, two DC-DC conversion circuits are all
It is operated at its design point, to ensure high efficiency.
In addition, when two DC-DC conversion circuits are switched with 90 degree of phase shifts, the high-frequency output voltage ripple of output terminal
It can be substantially reduced.Because the size very little of high fdrequency component can reduce the size and cost of output filter.
Although having been based on some preferred embodiments, invention has been described, those skilled in the art should be managed
Solution, those embodiments should not limit the scope of the present invention absolutely.It is right in the case where not departing from spirit and concept of the invention
Any change and modification of embodiment all should within the understanding of technical staff that this field has general knowledge and technology,
And it therefore falls within the scope of the present invention defined by the appended claims.
Claims (9)
1. a kind of AC-DC power adapter, comprising:
AC-DC conversion circuit with the first controllable power switch, the AC-DC conversion circuit are configured to receive the first AC power supplies
And export the first DC power supply generated from first AC power supplies；
Multiple DC-DC conversion circuits, each of the multiple DC-DC conversion circuit, which has to the centre of the second AC power supplies, to be turned
It changes, the multiple DC-DC conversion circuit is configured to receive first DC power supply and combines the output of the second DC power supply, wherein institute
Stating each of multiple DC-DC conversion circuits includes the full-bridge DC-AC conversion circuit with the second controllable power switch, DC
Side is coupled across the output of the AC-DC conversion circuit, is inserted into capacity cell between the both ends of the side AC；And
Controller, the controller are configured to:
The first control signal for switching on and off first controllable power switch of the AC-DC conversion circuit is generated,
The D/C voltage of first DC power supply is adjusted in DC voltage range；And
Multiple second control signals are generated, each of the multiple second control signal is used in full-bridge mode and half-bridge mould
Described second that the corresponding full-bridge DC-AC conversion circuit of the multiple DC-DC conversion circuit is switched on and off under formula can
Power switch is controlled, so that multilevel voltage gain is presented in the multiple DC-DC conversion circuit；
Wherein:
The DC voltage range of the AC-DC conversion circuit is set to cover two continuous grades from the voltage gain
Voltage increase.
2. AC-DC power adapter according to claim 1, in which:
Under the full-bridge mode, described second in the first branch and second branch of the full-bridge DC-AC conversion circuit can
Each of power switch is controlled with essentially identical duty ratio and essentially identical switching frequency operation；And
Under the half-bridge mode, each of described second controllable power switch in the first branch is with essentially identical
Duty ratio and the operation of essentially identical switching frequency, and in second controllable power switch in the second branch
One is continuously switched on, another continuous disconnection in the second branch.
3. AC-DC power adapter according to any one of the preceding claims, in which:
The second switch is that there is the controllable one-way electric power semiconductor of antiparallel uncontrolled unidirectional current-carrying semiconductor to open
It closes.
4. AC-DC power adapter according to any one of the preceding claims, in which:
The output series coupled of the DC-DC conversion circuit.
5. AC-DC power adapter according to any one of the preceding claims, further includes:
Resonant inductance element, the resonant inductance element and the capacity cell series coupled, so that the full-bridge DC-AC is converted
Circuit is all operated under the full-bridge mode and the half-bridge mode with ZVS.
6. a kind of method for operating AC-DC power adapter, which comprises
First DC power supply with adjustable DC voltage range is generated from the first AC power supplies；And
It combines multiple outputs of the DC-DC power source conversion from first DC power supply and generates the second DC power supply, wherein is described
Each of multiple DC-DC power source conversions, which have, to be converted by capacity cell to the intermediate power supplies of the second AC power supplies, and
Implement under full-bridge mode or half-bridge mode, so that multilevel voltage gain is presented in the multiple DC-DC power source conversion；
Wherein:
The voltage that the DC voltage range is adjusted to cover two continuous grades of the voltage gain increases.
7. according to the method described in claim 6, wherein:
Under the full-bridge mode, each of described full-bridge DC-DC power source conversion is with essentially identical duty ratio and substantially
Identical switching frequency operation；And
Under the half-bridge mode, each of described half-bridge DC-DC power source conversion with the essentially identical duty ratio and
The essentially identical switching frequency operation.
8. the method according to any one of the preceding claims, in which:
The output series coupled of the DC-DC power source conversion.
9. the method according to any one of the preceding claims, in which:
Resonant inductance element and the capacity cell series coupled, so that the full-bridge DC-AC conversion circuit is in the full-bridge mould
It is all operated under formula and under the half-bridge mode with ZVS.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/083883 WO2017206011A1 (en) | 2016-05-30 | 2016-05-30 | Ac-dc power converter and method therefor |
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| CN109196768A true CN109196768A (en) | 2019-01-11 |
| CN109196768B CN109196768B (en) | 2021-01-15 |
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| CN201680086262.1A Active CN109196768B (en) | 2016-05-30 | 2016-05-30 | AC-DC power converter and method for the same |
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| CN (1) | CN109196768B (en) |
| WO (1) | WO2017206011A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726005A (en) * | 2019-03-22 | 2020-09-29 | 英飞凌科技奥地利有限公司 | Phase-shifted full-bridge converter, method of operating a phase-shifted full-bridge converter and AC/DC converter |
| CN113612394A (en) * | 2021-09-02 | 2021-11-05 | 易事特集团股份有限公司 | Topology switching method and device of full-bridge CLLC resonant converter |
| TWI796859B (en) * | 2021-12-03 | 2023-03-21 | 偉詮電子股份有限公司 | Power supplies with multiple ports, and control methods thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10224827B1 (en) * | 2018-02-15 | 2019-03-05 | Futurewei Technologies, Inc. | Power converter with wide DC voltage range |
| FR3127729A1 (en) * | 2021-10-04 | 2023-04-07 | Vitesco Technologies | Motor vehicle electrical system |
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| CN203775072U (en) * | 2014-02-14 | 2014-08-13 | 福州开发区星云电子自动化有限公司 | Multichannel energy-bidirectional cell tester |
| CN203967994U (en) * | 2014-05-30 | 2014-11-26 | 山东大学 | Unity power factor single-stage AC-DC converter |
| CN104734520A (en) * | 2015-03-23 | 2015-06-24 | 深圳市皓文电子有限公司 | DC/DC converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2566579B2 (en) * | 1987-06-25 | 1996-12-25 | 三菱電機株式会社 | Power converter |
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- 2016-05-30 CN CN201680086262.1A patent/CN109196768B/en active Active
- 2016-05-30 WO PCT/CN2016/083883 patent/WO2017206011A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203775072U (en) * | 2014-02-14 | 2014-08-13 | 福州开发区星云电子自动化有限公司 | Multichannel energy-bidirectional cell tester |
| CN203967994U (en) * | 2014-05-30 | 2014-11-26 | 山东大学 | Unity power factor single-stage AC-DC converter |
| CN104734520A (en) * | 2015-03-23 | 2015-06-24 | 深圳市皓文电子有限公司 | DC/DC converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111726005A (en) * | 2019-03-22 | 2020-09-29 | 英飞凌科技奥地利有限公司 | Phase-shifted full-bridge converter, method of operating a phase-shifted full-bridge converter and AC/DC converter |
| CN113612394A (en) * | 2021-09-02 | 2021-11-05 | 易事特集团股份有限公司 | Topology switching method and device of full-bridge CLLC resonant converter |
| TWI796859B (en) * | 2021-12-03 | 2023-03-21 | 偉詮電子股份有限公司 | Power supplies with multiple ports, and control methods thereof |
Also Published As
| Publication number | Publication date |
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| CN109196768B (en) | 2021-01-15 |
| WO2017206011A1 (en) | 2017-12-07 |
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