CN108365760A - A kind of hybrid modulation isolated form doubleway output DC-DC converter - Google Patents
A kind of hybrid modulation isolated form doubleway output DC-DC converter Download PDFInfo
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- CN108365760A CN108365760A CN201810326931.9A CN201810326931A CN108365760A CN 108365760 A CN108365760 A CN 108365760A CN 201810326931 A CN201810326931 A CN 201810326931A CN 108365760 A CN108365760 A CN 108365760A
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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
- H02M3/33561—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 more than one ouput with independent control
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
-
- 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 hybrid modulation isolated form doubleway output DC DC converters, including：Input power；DC input voitage is transformed to higher DC output voltage by half-bridge logical link control (LLC) resonant circuit in parallel using frequency modulated mode, and secondary side is full-wave rectifying circuit structure；Phase whole-bridging circuit is connected between two bridge arms of the half-bridge logical link control (LLC) resonant circuit in parallel, DC input voitage is transformed to relatively low DC output voltage using the phase mode adjusted between two bridge arms, secondary side is full-wave rectifying circuit structure.The converter improve two-way output between independence and stability, reduce two-way output between influence each other.The converter realizes steady dc voltage output by controlling output voltage；Meanwhile the converter has high frequency transformer, and electrical isolation may be implemented.
Description
Technical field
The invention belongs to field of power electronics, and in particular to a kind of hybrid modulation isolated form doubleway output DC-DC converter.
Background technology
With the development of electric vehicle, mechanics of communication and electric system etc., to electric car charger, communication switch electricity
More stringent requirements are proposed for the performance of source and electric power operation electricity, weight, volume, efficiency and reliability etc., these fields
Power supply generally use DC power supply, such as electric car charger output DC power supply charge the battery.In certain occasions,
Many electrical equipments need in two-way even multi-channel dc power supply, such as electric vehicle, same charging to power battery
When, it needs to be powered the other equipment of automobile.Traditionally to this kind of electrical equipment using two sets of independent power supply systems into
Row power supply, which increase the cost of system operation and volumes, are unfavorable for the integrated of system.And some existing doubleway outputs become
In parallel operation, High voltage output and low pressure output is not mutual indepedent, and there are problems that cross regulation rate in two-way power supply, this gives two
The control of road output voltage brings difficulty.
X.Gao, H.F.Wu and Y.Xing et al. are in entitled A Multi-Output LLC Resonant Converter
with Semi-Active Rectifiers(IEEE Journal of Emerging and Selected Topics in
Power Electronics, 2017.5 (4), pp.1819-1827.) propose a kind of two-way based on half-bridge logical link control (LLC) resonant circuit
The mutually isolated of two-way output may be implemented while realizing that two-way exports independent control in output translator, the converter, and
Zero-voltage soft switch may be implemented in primary side switch pipe.But secondary side is not controlled two diodes in rectification by the converter to be changed
Be switching tube to become half active rectification, the cost of converter can be increased, increase the control difficulty of converter.
The patent application of Publication No. CN106787724A discloses a kind of switch zero voltage turn-off dual input high-gain
DC/DC converters, including two direct-current input power supplyings, two inductance, two power switch and two zero voltage turn-offs are soft opens
Close auxiliary circuit and multiplication modules.The anode of input the first direct-current input power supplying of termination of first inductance, the input of the second inductance
Terminating the anode of the second direct-current input power supplying, output end connects the drain electrode of the first power switch and the second power switch respectively, and first
The source electrode of power switch and the second power switch connects the cathode of input power；The grid of two power switch connects respective control respectively
Device processed；Two zero voltage turn-off Sofe Switch auxiliary circuits are all made of a capacitance and two diodes, the first inductance and
The output end of two inductance connects corresponding node in zero voltage turn-off Sofe Switch auxiliary circuit network respectively；Two multiplication modules be by
There are four the units of port for the tool that two diodes and two capacitances are constituted.The technology contents use two-way direct current power input side
The comprehensive utilization ratio that formula improves the energy does not still reduce converter cost.
Invention content
The object of the present invention is to provide a kind of hybrid modulation isolated form doubleway output DC-DC converters.The converter is logical
It crosses two different circuit topologies and realizes the mutually independent voltage output of two-way, and two-way exports mutually isolated, independent pressure regulation；It should
Converter realizes steady dc voltage output by controlling output voltage；Meanwhile the converter has high frequency transformer, it can
To realize the function of electrical isolation.
For achieving the above object, the present invention provides following technical scheme：
A kind of hybrid modulation isolated form doubleway output DC-DC converter, including：
Input power；
It is defeated to be transformed to higher direct current by half-bridge logical link control (LLC) resonant circuit in parallel using frequency modulated mode for DC input voitage
Go out voltage, secondary side is full-wave rectification structure；
Phase whole-bridging circuit is connected between two bridge arms of the half-bridge logical link control (LLC) resonant circuit in parallel, using adjusting two
DC input voitage is transformed to relatively low DC output voltage by the phase mode between bridge arm, and secondary side is full-wave rectification structure.
Preferably, the primary side of the half-bridge logical link control (LLC) resonant circuit in parallel includes：
First bridge arm is made of concatenated first power switch tube and the second power switch tube, the first power switch tube
Drain electrode is connected with the anode of the input power, and the source electrode of the second power switch tube is connected with the cathode of the input power；
Second bridge arm, it is in parallel with first bridge arm, by concatenated third power switch tube and the 4th power switch tube group
At the drain electrode of third power switch tube is connected with the drain electrode of the first power switch tube, the source electrode and second of the 4th power switch tube
The source electrode of power switch tube is connected；
First resonant capacitance, the second resonant capacitance；
First resonant inductance；Second resonant inductance；
First transformer primary side winding；Second transformer primary side winding；
The Same Name of Ends of first transformer primary side winding passes sequentially through the first resonant inductance, the first resonant capacitance and the first power
The source electrode of switching tube connects altogether, and the different name end of the first transformer primary side winding connects altogether with the source electrode of the second power switch tube；
The Same Name of Ends of second transformer primary side winding passes sequentially through the second resonant inductance, the second resonant capacitance and third power
The source electrode of switching tube connects altogether, and the different name end of the second transformer primary side winding and the source electrode of the 4th power switch tube connect altogether；
First power switch tube, the second power switch tube, third power switch tube and the 4th equal band of power switch tube
There is anti-and diode.
Preferably, the secondary side of the half-bridge logical link control (LLC) resonant circuit in parallel includes：
First vice-side winding of the first transformer, the second vice-side winding of the first transformer, first vice-side winding
Different name end is connected with the Same Name of Ends of the second vice-side winding；
First power diode, anode are connected with the Same Name of Ends of first vice-side winding,
Second power diode, anode are connected with the different name end of second vice-side winding, cathode and first power
The cathode of diode is connected；
The third vice-side winding of second transformer, the 4th vice-side winding of the second transformer, the third vice-side winding
Different name end is connected with the Same Name of Ends of the 4th vice-side winding；
Third power diode, anode are connected with the Same Name of Ends of the third vice-side winding,
4th power diode, anode are connected with the different name end of the 4th vice-side winding, cathode and the third power
The cathode of diode is connected；
First filter capacitor, cathode are connected with the different name end of first vice-side winding, positive and first power two
The cathode of pole pipe is connected；
Second filter capacitor, cathode are connected with the different name end of the third vice-side winding, anode simultaneously with the third work(
The cathode of rate diode is connected with the cathode of first filter capacitor；
Relatively Gao Zhi of the anode of first filter capacitor with the cathode of second filter capacitor as DC-DC converter
Flow voltage output end.
Preferably, the primary side of the phase whole-bridging circuit includes：
Capacitance, the positive source electrode with first power switch tube are connected, the positive phase of cathode and third transformer
Even；
The primary side winding of third transformer, Same Name of Ends are connected with the cathode of the capacitance, different name end and described the
The source electrode of three power switch tubes is connected.
Preferably, the secondary side of the phase whole-bridging circuit includes：
5th vice-side winding of third transformer, the 6th vice-side winding of third transformer, the 5th vice-side winding
Different name end is connected with the Same Name of Ends of the 6th vice-side winding；
5th power diode, anode are connected with the Same Name of Ends of the 5th vice-side winding,
6th power diode, anode are connected with the different name end of the 6th vice-side winding, cathode and the 5th power
The cathode of diode is connected；
Filter inductance, the positive cathode with the 5th power diode are connected, the anode of cathode and third filter capacitor
It is connected；
Third filter capacitor, the positive cathode with the filter inductance are connected, and cathode is different with the 5th vice-side winding
Name end is connected；
Relatively low DC voltage output end of the positive electrode and negative electrode of the third filter capacitor as DC-DC converter.
Preferably, first power switch tube, the second power switch tube, third power switch tube and the 4th power switch
Pipe is power metal-oxide semiconductor field effect transistor, it can be achieved that no-voltage opens (Zero Voltage
Switching, ZVS).
Wherein, the secondary side of the half-bridge logical link control (LLC) resonant circuit in parallel can also be full bridge rectifier structure.
Compared with prior art, the device have the advantages that being：
(1) the LLC resonance circuits of two-way parallel connection reduce the electricity of each resonant cavity compared to traditional LLC resonance circuit
Stream reduces the current stress per device on the way, and then reduces volume and the loss of magnetic cell；
(2) High voltage output exports from low pressure and uses different control variables, realizes the independent control of two-way output, reduces
Influencing each other between two-way output；
(3) it using the input concatenated resonant cavity parallel method of parallel connection-output, preferably realizes between two resonant cavities
It flows, enhances circuit stability；
(4) High voltage output primary side is half-bridge logical link control (LLC) resonant circuit, and it is phase whole-bridging circuit, phase-shifting full-bridge that low pressure, which exports primary side,
The primary side inductance of circuit can be accomplished small as possible, can ignore duty-cycle loss problem；No-voltage may be implemented in primary side switch pipe
Sofe Switch reduces the loss of system.
Description of the drawings
Fig. 1 is the structural schematic diagram of hybrid modulation isolated form doubleway output DC-DC converter provided by the invention；
Fig. 2 is the working waveform figure of hybrid modulation isolated form doubleway output DC-DC converter provided by the invention；
Fig. 3 is equivalent circuit diagram when DC-DC converter shown in FIG. 1 is in operation mode 1；
Fig. 4 is equivalent circuit diagram when DC-DC converter shown in FIG. 1 is in operation mode 2；
Fig. 5 is equivalent circuit diagram when DC-DC converter shown in FIG. 1 is in operation mode 3；
Fig. 6 is equivalent circuit diagram when DC-DC converter shown in FIG. 1 is in operation mode 4.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
Do not limit protection scope of the present invention.
A kind of hybrid modulation isolated form doubleway output DC-DC converter, including a half-bridge logical link control (LLC) resonant circuit in parallel and shifting
Phase full-bridge circuit；The primary side of LLC resonance circuits in parallel is half-bridge circuit structure, and secondary side is full-wave rectifying circuit structure；Phase shift is complete
The primary side of bridge circuit is full-bridge circuit structure, and secondary side is full-wave rectification structure；The diode of use is power diode.
As shown in Figure 1, primary circuit includes：
1) the first primary side branch being connected with input power, by the first power switch tube S1, the second power switch tube S2Group
At；The second primary side branch being connected with input power, by third power switch tube S3, the 4th power switch tube S4Composition.First work(
Rate switching tube S1Drain electrode be connected with input power anode, the second power switch tube S2Drain electrode and the first power switch tube S1's
Source electrode is connected, the second power switch tube S2Source electrode be connected with input power cathode；Third power switch tube S3Drain electrode and input
Positive pole is connected, the 4th power switch tube S4Drain electrode and third power switch tube S3Source electrode be connected, the 4th power switch tube
S4Source electrode be connected with input power cathode.The switching tube S1、S2、S3And S4For power metal-oxide semiconductor field effect
Transistor (MOSFET).
2) resonant capacitance Cr1, resonant inductance Lr1With transformer T1(transformer T1It is equivalent at by magnetizing inductance Lm1Become with ideal
Depressor forms) it is connected with the first primary side branch, resonant capacitance Cr2, resonant inductance Lr2With transformer T2(transformer T2It is equivalent at by
Magnetizing inductance Lm2Formed with ideal transformer) it is connected with the second primary side branch, capacitance CB, transformer T3(transformer T3It is equivalent
At by the leakage inductance L as resonant inductancer3Formed with ideal transformer) and the first primary side branch midpoint and the second primary side branch midpoint
It is connected.Resonant capacitance Cr1With resonant inductance Lr1Series connection, resonant capacitance Cr1First power switch of one end and the first primary side branch road
Pipe S1Source electrode be connected, resonant inductance Lr1One end and transformer T1The Same Name of Ends of primary side winding is connected, transformer T1Primary side winding
Different name end and first the second power switch tube S of primary side branch road2Source electrode be connected.Resonant capacitance Cr2With resonant inductance Lr2String
Connection, resonant capacitance Cr2The third power switch tube S of one end and the second primary side branch road3Source electrode be connected, resonant inductance Lr2One
End and transformer T2The Same Name of Ends of primary side winding is connected, transformer T2The different name end of primary side winding and the second primary side branch road the 4th
Power switch tube S4Source electrode be connected.Capacitance CBWith transformer T3Series connection, capacitance CBOne end and the first primary side branch road
The first power switch tube S1Source electrode be connected, capacitance CBThe other end and transformer T3The Same Name of Ends of primary side winding is connected, and becomes
Depressor T3The different name end of primary side winding and the second primary side branch road third power switch tube S3Source electrode be connected.
3) isolating transformer T1Primary side winding Same Name of Ends and resonant capacitance Cr1, resonant inductance Lr1It is connected.Transformation is isolated
Device T1Different name end and the first primary side branch the second power switch tube S2Source electrode one end be connected.Isolating transformer T2Primary side
The Same Name of Ends of winding and resonant capacitance Cr2, resonant inductance Lr2It is connected.Isolating transformer T2Different name end and the second primary side branch
4th power switch tube S4Source electrode one end be connected.The leakage inductance for not considering transformer, by adjusting the first power on the first bridge arm
Switching tube S1, the second power switch tube S2And the second third power switch tube S on bridge arm3, the 4th power switch tube S4It is open-minded
Carry out the frequency of regulating switch network with shutdown, and then change resonant network gain, output voltage is adjusted with this to be needed
Voltage value.Isolating transformer T3Primary side winding Same Name of Ends and capacitance CBIt is connected.Isolating transformer T3Different name end with
The third power switch tube S of second primary side branch3Source electrode one end be connected.By adjusting the first primary side branch and the second primary side branch
The phase difference of two bridge arm midpoint output voltage of phase adjusted between road, and then change the duty ratio of waveform between two bridge arm midpoints,
Output voltage is adjusted with this to obtain required voltage value.
Secondary circuit includes：
1) the secondary side branch of first in parallel with the first output loading, by the first power diode Do1, the second power diode
Do2, third power diode Do3, the 4th power diode Do4, the first output filter capacitor Co1, the second output filter capacitor Co2、
Isolating transformer T1The first vice-side winding and the second vice-side winding and isolating transformer T2The first vice-side winding and second
Vice-side winding forms.Wherein isolating transformer T1The first vice-side winding Same Name of Ends and the first power diode Do1Anode is connected,
Different name end and isolating transformer T1The second vice-side winding Same Name of Ends be connected, and be connected to the first output filter capacitor Co1Cathode；
Isolating transformer T1The second vice-side winding different name end and the second power diode Do2Anode is connected；First power diode Do1's
Cathode and the second power diode Do2Cathode be connected, and be connected to the first output filter capacitor Co1Anode.Isolating transformer T2
The first vice-side winding Same Name of Ends and third power diode Do3Anode is connected, different name end and isolating transformer T2The second secondary side
Motor Winding Same Name of Ends is connected, and is connected to the second output filter capacitor Co2Cathode；Isolating transformer T2The second vice-side winding different name
End and the 4th power diode Do4Anode is connected；Third power diode Do3Cathode and the 4th power diode Do4Cathode
It is connected, and is connected to the second output filter capacitor Co2Anode.First output filter capacitor Co1Anode to be connected to the first output negative
Carry anode tap, the first output filter capacitor Co1Cathode be connected to the second output filter capacitor Co2Anode, second output filtering
Capacitance Co2Cathode be connected to the first output loading cathode terminal.
2) the third pair side branch in parallel with output loading, by the 5th power diode Do5, the 6th power diode Do6、
Isolating transformer T3The first vice-side winding and the second vice-side winding, output inductor LfWith output filter capacitor CoComposition.Its
Middle isolating transformer T3The first vice-side winding Same Name of Ends and the 5th power diode Do5Anode is connected, isolating transformer T3
One vice-side winding different name end and isolating transformer T3The second vice-side winding Same Name of Ends be connected, and be connected to output filter capacitor Co
Cathode；Isolating transformer T3The second vice-side winding different name end and the 6th power diode Do6Anode is connected；5th power, two pole
Pipe Do5Cathode and the 6th power diode Do6Cathode be connected, and be connected to output inductor LfOne end, output filtering
Inductance LfThe other end and output filter capacitor CoAnode be connected；Output filter capacitor CoAnode and output loading anode
End is connected, output filter capacitor CoCathode be connected with the cathode terminal of output loading.
3) output loading：Output loading is load RL1With RL2, load RL1With RL2It is connected across two-way output port respectively just
Negative both ends.
The converter of the present invention, half-bridge logical link control (LLC) resonant circuit in parallel carry out pressure regulation, design output by the way of adjusting frequency
The DC voltage of 200V~400V, referred to as high-pressure side；Phase whole-bridging circuit carries out pressure regulation by the way of adjusting phase, and design is defeated
Go out the DC voltage of 48V, referred to as low-pressure side.The mutually isolated and independent control of two-way outlet chamber may be implemented.
To describe operation mode commutation course, it is as follows to make assumed condition：
(1) to simplify the analysis, the resonant inductance L in two-way parallel connection LLC resonance circuitsr1=Lr2, resonant capacitance Cr1=Cr2,
Magnetizing inductance Lm1=Lm2；
(2) to simplify the analysis, in analysis, ignore the dead time of two switching tubes on the same bridge arm；
The power switch tube S of (3) first primary side branches1、S2Complementary duty is in resonant frequency；The work(of second primary side branch
Rate switching tube S3、S4Complementary duty is in resonant frequency；
Phase shift between (4) two bridge arm switching signals is more than 0 °, is less than 180 °.
Commutation course analyzes (ignoring dead time)：
1) mode 1：[t0~t1]
As shown in figure 3, switching tube S1Conducting, S2Shutdown, S3Shutdown, S4Conducting, resonant capacitance Cr1With resonant inductance Lr1Occur
Resonance, resonance current iLr1Lag input voltage, switching tube S1Zero-voltage soft is open-minded, resonance current iLr1Change in sinusoidal form,
Resonance current iLr1With excitation inductance current iLm1Difference be transmitted to secondary side；Resonant capacitance Cr2With resonant inductance Lr2Resonance occurs, it is humorous
Shake electric current iLr2Change in sinusoidal form, excitation inductance current iLm2With resonant inductance iLr2Difference be transmitted to secondary side；Phase-shifting full-bridge electricity
The input voltage v on roadABFor+Vin, electric current iLr3It linearly increases.
2) mode 2：[t1~t2]
As shown in figure 4, switching tube S1Conducting, S2Shutdown, S3Conducting, S4Shutdown, resonant capacitance Cr1With resonant inductance Lr1Occur
Resonance, resonance current iLr1Change in sinusoidal form, resonance current iLr1With excitation inductance current iLm1Difference be transmitted to secondary side；By
In resonance current iLr2Lag input voltage, switching tube S3Zero-voltage soft is open-minded, resonance current iLr2With excitation inductance current iLm2It
Difference is transmitted to secondary side；The input voltage v of phase whole-bridging circuitABIt is 0, secondary side diode D at this timeo5And Do6It simultaneously turns on so that become
Depressor T3Vice-side winding voltage be zero, primary side winding voltage also mutually should be zero, transformer T3Leakage inductance Lr3With capacitance CBWork
Make under resonance condition.
3) mode 3：[t2~t3]
As shown in figure 5, switching tube S1Shutdown, S2Conducting, S3Conducting, S4Shutdown, resonant capacitance Cr1With resonant inductance Lr1Occur
Resonance, resonance current iLr1Change in sinusoidal form, due to resonance current iLr1Lag input voltage, switching tube S3Zero-voltage soft is opened
It is logical, excitation inductance current iLm1With resonance current iLr1Difference be transmitted to secondary side；Resonant capacitance Cr2With resonant inductance Lr2Occur humorous
It shakes, resonance current iLr2Change in sinusoidal form, resonance current iLr2With excitation inductance current iLm2Difference be transmitted to secondary side；Phase shift
The input voltage v of full-bridge circuitABFor-Vin, electric current iLr3It linearly increases.
4) mode 4：[t3~t4]
As shown in fig. 6, switching tube S1Shutdown, S2Conducting, S3Shutdown, S4Conducting, resonant capacitance Cr1With resonant inductance Lr1Occur
Resonance, resonance current iLr1Change in sinusoidal form, excitation inductance current iLm1With resonance current iLr1Difference be transmitted to secondary side；It is humorous
Shake capacitance Cr2With resonant inductance Lr2Resonance, resonance current i occursLr2Lag input voltage, resonance current iLr2Become in sinusoidal form
Change, switching tube S4Zero-voltage soft is open-minded, excitation inductance current iLm2With resonance current iLr2Difference be transmitted to secondary side；Phase-shifting full-bridge electricity
The input voltage v on roadABIt is 0, secondary side diode D at this timeo5And Do6It simultaneously turns on so that transformer T3Vice-side winding voltage be
Zero, primary side winding voltage also mutually should be zero, transformer T3Leakage inductance Lr3With capacitance CBWork is under resonance condition.
Technical scheme of the present invention and advantageous effect is described in detail in above-described specific implementation mode, Ying Li
Solution is not intended to restrict the invention the foregoing is merely presently most preferred embodiment of the invention, all principle models in the present invention
Interior done any modification, supplementary, and equivalent replacement etc. are enclosed, should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of hybrid modulation isolated form doubleway output DC-DC converter, which is characterized in that including：
Input power；
DC input voitage is transformed to high DC output voltage by half-bridge logical link control (LLC) resonant circuit in parallel using frequency modulated mode, secondary
Side is full-wave rectifying circuit structure；
Phase whole-bridging circuit is connected between two bridge arms of the half-bridge logical link control (LLC) resonant circuit in parallel, using two bridge arms of adjusting
Between phase mode DC input voitage is transformed to low DC output voltage, secondary side is full-wave rectifying circuit structure.
2. hybrid modulation isolated form doubleway output DC-DC converter as described in claim 1, which is characterized in that the parallel connection
The primary side of half-bridge logical link control (LLC) resonant circuit includes：
First bridge arm is made of, the drain electrode of the first power switch tube concatenated first power switch tube and the second power switch tube
It is connected with the anode of the input power, the source electrode of the second power switch tube is connected with the cathode of the input power；
Second bridge arm, it is in parallel with first bridge arm, it is made of concatenated third power switch tube and the 4th power switch tube, the
The drain electrode of three power switch tubes is connected with the drain electrode of the first power switch tube, and source electrode and the second power of the 4th power switch tube are opened
The source electrode for closing pipe is connected；
First resonant capacitance, the second resonant capacitance；
First resonant inductance；Second resonant inductance；
First transformer primary side winding；Second transformer primary side winding；
The Same Name of Ends of first transformer primary side winding passes sequentially through the first resonant inductance, the first resonant capacitance and the first power switch
The source electrode of pipe connects altogether, and the different name end of the first transformer primary side winding connects altogether with the source electrode of the second power switch tube；
The Same Name of Ends of second transformer primary side winding passes sequentially through the second resonant inductance, the second resonant capacitance and third power switch
The source electrode of pipe connects altogether, and the different name end of the second transformer primary side winding and the source electrode of the 4th power switch tube connect altogether；
First power switch tube, the second power switch tube, third power switch tube and the 4th power switch tube carry anti-
And diode.
3. hybrid modulation isolated form doubleway output DC-DC converter as claimed in claim 2, which is characterized in that the parallel connection
The secondary side of half-bridge logical link control (LLC) resonant circuit includes：
First vice-side winding of the first transformer, the second vice-side winding of the first transformer, the different name of first vice-side winding
End is connected with the Same Name of Ends of the second vice-side winding；
First power diode, anode are connected with the Same Name of Ends of first vice-side winding,
Second power diode, anode are connected with the different name end of second vice-side winding, cathode and two pole of the first power
The cathode of pipe is connected；
The third vice-side winding of second transformer, the 4th vice-side winding of the second transformer, the different name of the third vice-side winding
End is connected with the Same Name of Ends of the 4th vice-side winding；
Third power diode, anode are connected with the Same Name of Ends of the third vice-side winding,
4th power diode, anode are connected with the different name end of the 4th vice-side winding, cathode and two pole of third power
The cathode of pipe is connected；
First filter capacitor, cathode are connected with the different name end of first vice-side winding, positive and first power diode
Cathode be connected；
Second filter capacitor, cathode are connected with the different name end of the third vice-side winding, anode simultaneously with the third power two
The cathode of pole pipe is connected with the cathode of first filter capacitor；
High Level DC Voltage of the anode of first filter capacitor with the cathode of second filter capacitor as DC-DC converter
Output end.
4. hybrid modulation isolated form doubleway output DC-DC converter as claimed in claim 3, which is characterized in that the phase shift
The primary side of full-bridge circuit includes：
Capacitance, the positive source electrode with first power switch tube are connected, and cathode is connected with the anode of third transformer；
The primary side winding of third transformer, Same Name of Ends are connected with the cathode of the capacitance, different name end and the third work(
The source electrode of rate switching tube is connected.
5. hybrid modulation isolated form doubleway output DC-DC converter as claimed in claim 4, which is characterized in that the phase shift
The secondary side of full-bridge circuit includes：
5th vice-side winding of third transformer, the 6th vice-side winding of third transformer, the different name of the 5th vice-side winding
End is connected with the Same Name of Ends of the 6th vice-side winding；
5th power diode, anode are connected with the Same Name of Ends of the 5th vice-side winding,
6th power diode, anode are connected with the different name end of the 6th vice-side winding, cathode and two pole of the 5th power
The cathode of pipe is connected；
Filter inductance, the positive cathode with the 5th power diode are connected, and cathode is connected with the anode of third filter capacitor；
Third filter capacitor, the positive cathode with the filter inductance are connected, the different name end of cathode and the 5th vice-side winding
It is connected；
Low dc voltage output end of the positive electrode and negative electrode of the third filter capacitor as DC-DC converter.
6. hybrid modulation isolated form doubleway output DC-DC converter as claimed in claim 2, which is characterized in that described first
Power switch tube, the second power switch tube, third power switch tube and the 4th power switch tube are power metal-oxide half
Conductor field-effect transistor.
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| CN112910262A (en) * | 2021-01-21 | 2021-06-04 | 沈阳工业大学 | Isolation DC-DC converter integrating DAB and LLC resonant circuit |
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| CN113965091A (en) * | 2021-11-03 | 2022-01-21 | 上海交通大学 | Current equalizing circuit based on cascaded full bridge and control method thereof |
| CN114096030A (en) * | 2021-12-23 | 2022-02-25 | 深圳市海洋王绿色照明技术有限公司 | High-power short-arc xenon lamp driving power supply and method |
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| CN114096030A (en) * | 2021-12-23 | 2022-02-25 | 深圳市海洋王绿色照明技术有限公司 | High-power short-arc xenon lamp driving power supply and method |
| CN114884362A (en) * | 2022-05-09 | 2022-08-09 | 南京航空航天大学 | High-gain wide-range input and independent output series DC-DC converter |
| CN114977446A (en) * | 2022-05-19 | 2022-08-30 | 厦门大学 | Semi-active rectification electric energy transmission device based on adaptive fractional order self-control circuit |
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