CN109687716A - A kind of controlled resonant converter of series-parallel bumpless transfer - Google Patents

A kind of controlled resonant converter of series-parallel bumpless transfer Download PDF

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Publication number
CN109687716A
CN109687716A CN201811649059.8A CN201811649059A CN109687716A CN 109687716 A CN109687716 A CN 109687716A CN 201811649059 A CN201811649059 A CN 201811649059A CN 109687716 A CN109687716 A CN 109687716A
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CN
China
Prior art keywords
switching tube
diode
switch
transformer
connects
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CN201811649059.8A
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Chinese (zh)
Inventor
李建山
徐增新
曾瑞龙
岑央群
徐利敏
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HANGZHOU ZHONGHENG ELECTRIC CO Ltd
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HANGZHOU ZHONGHENG ELECTRIC CO Ltd
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Priority to CN201811649059.8A priority Critical patent/CN109687716A/en
Publication of CN109687716A publication Critical patent/CN109687716A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—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 having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • 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 present invention provides a kind of controlled resonant converters of series-parallel bumpless transfer, belong to power electronics field, including DC power supply, switching circuit, resonance circuit, rectification circuit and the filter circuit being sequentially connected electrically；Switching circuit receives peripheral control unit control；Resonance circuit includes the transformer module for being connected to the resonance modules of switching circuit and connecting with resonance modules；Transformer module includes N number of transformer, and resonance modules include N group resonance group, and switching circuit includes N group switch module, and N >=2 and N are even number；Rectification circuit includes the first rectification module, the second rectification module and third rectification module.Solve the problems, such as that current controlled resonant converter constant power output voltage range is limited, output voltage range is discontinuous, at high cost, volume is big, cannot export no-voltage.

Description

A kind of controlled resonant converter of series-parallel bumpless transfer
Technical field
The invention belongs to power electronics field more particularly to a kind of controlled resonant converters of series-parallel bumpless transfer.
Background technique
Currently, common controlled resonant converter includes series, parallel, string and controlled resonant converter.Due to the letter of controlled resonant converter Single circuit topology, and can be in the characteristic of full-load range realization Sofe Switch, thus controlled resonant converter is widely used in providing The most advanced power supply of maximum power density and efficiency.Although controlled resonant converter has realizes switching device Sofe Switch, and switching loss is small, It is high-efficient and relative to hard switching have superior EMI (Electromagnetic Interference, electromagnetic interference) property Many advantages, such as energy, but defect is still obvious, as shown in Figure 1, by taking controlled resonant converter basic at present as an example, the controlled resonant converter Output voltage usually output voltage is adjusted by adjusting working frequency, due to adjustment frequency range and resonance become The gain characteristic of parallel operation, adjustable range is very limited, is between 0.8 times -1.2 times of voltage rating；If resonance frequency condition The output voltage Vo of lower transformer T1 is voltage rating.
To solve the above-mentioned problems, as shown in Fig. 2, the common scheme of industry be switched using relay two transformers it Between series-parallel system, reach output wide scope invariable power transformation.Assuming that two transformer parameters are consistent, output electricity is not being considered In the case that pressure may adjust near voltage rating, when relay RY3 closure, RY1 and RY2 are disconnected, two transformers Work is in series model, then the output voltage of the topology is voltage rating (topology, that is, controlled resonant converter)；As relay RY1 and When RY2 closure, RY3 are disconnected, two transformer work are in paralleling model, the then specified electricity that the output voltage of the topology is 1/2 times Pressure, output power keep constant and (do not reduce).Considering that the controlled resonant converter output voltage may be by adjusting frequency in volume Under conditions of constant voltage nearby adjusts, i.e., according to 0.8 times that the adjustable range of aforementioned single controlled resonant converter is voltage rating- Between 1.2 times, controlled resonant converter output constant power voltage regulation limits shown in Fig. 2 are 0.4 times -1.2 times of voltage rating, can See that its output voltage range is very wide, but due to the controlled resonant converter merely by relay progress simply cut in series and parallel It changes, invariable power range is not that continuous (for example cannot realize that invariable power is defeated in 0.6-0.8 times of the range of nominal tension Even cannot achieve the output voltage of the range section out), and it is larger and expensive there are relay volume, and then cause entire humorous The converter that shakes is at high cost, bulky problem.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to a kind of resonant transformations of series-parallel bumpless transfer Device leads to that entire controlled resonant converter is at high cost, volume is big though its output voltage range can be expanded by solving current controlled resonant converter The problem of.
The purpose of the present invention adopts the following technical scheme that realization:
A kind of controlled resonant converter of series-parallel bumpless transfer, including the DC power supply, switching circuit, resonance being sequentially connected electrically Circuit, rectification circuit and filter circuit；The switching circuit receives peripheral control unit control；The resonance circuit includes resonance Module and transformer module, the transformer module include N number of transformer, and the resonance modules include N group resonance group, described to open Powered-down road includes N group switch module, and N >=2 and N are even number；The rectification circuit includes the first rectification module, the second rectification module With third rectification module；Wherein,
The primary side Same Name of Ends of the transformer is connected to one end of the corresponding switch module through the correspondence resonance group, The primary side non-same polarity of the transformer is connected to the other end of the corresponding switch module；
If when N=2, the primary side Same Name of Ends of first transformer is connected in the bridge arm of first rectification module Point, the primary side non-same polarity of first transformer are connected with the primary side Same Name of Ends of second transformer, and second The primary side non-same polarity of a transformer is connected to the bridge arm midpoint of second rectification module, first transformer Primary side non-same polarity be connected to the bridge arm midpoint of the third rectification module；Or
If N > 2 and N are even number, the primary side Same Name of Ends of first transformer is connected to the first rectification mould The bridge arm midpoint of block, the primary side non-same polarity of first transformer and the primary side Same Name of Ends of second transformer It is connected, the primary side non-same polarity of the adjacent transformer is connected with primary side Same Name of Ends, the primary side of transformer described in n-th Non-same polarity is connected to the bridge arm midpoint of second rectification module, and the primary side non-same polarity of the N/2 transformers connects It is connected to the bridge arm midpoint of the third rectification module.
It, can be with by the switching tube that peripheral control unit switches in switching circuit as N=2 based on above-mentioned controlled resonant converter Make the primary side of two transformers bumpless transfer between serial or parallel connection mode, when two transformer work are in series model When, then the output voltage of controlled resonant converter is voltage rating；When the work of two transformers is in paralleling model, then controlled resonant converter Output voltage be 1/2 voltage rating；As N > 2 and when N is even number, passes through peripheral control unit and switch opening in switching circuit Closing pipe can make first transformer to N/2 transformer and 1+ (N/2) a transformer to the primary side of n-th transformer The bumpless transfer between serial or parallel connection mode, when first transformer to N/2 transformer and 1+ (N/2) a transformer To the work of n-th transformer in series model, then the output voltage of controlled resonant converter is higher than voltage rating；When first transformation Device to N/2 transformer and 1+ (N/2) a transformer to n-th transformer works in paralleling model, then resonant transformation The output voltage of device is lower than 1/2 voltage rating；And then the output voltage range of current controlled resonant converter can not only be expanded, may be used also It realizes that continuous invariable power voltage range is adjusted, and reduces the quantity of relay, reduce the cost of current controlled resonant converter, reduce The volume of controlled resonant converter at present, or even no-voltage can be exported.
Optionally, if when N=2, the primary side non-same polarity of first transformer and the third rectification module Relay is equipped between bridge arm midpoint；Or
If N > 2 and N are even number, the primary side non-same polarity and the third rectification module of the N/2 transformers Bridge arm midpoint between be equipped with relay.Based on relay is increased in controlled resonant converter, controlled resonant converter output may be implemented No-voltage.
Optionally, the DC power supply includes single DC power supply or multiple DC power supplies or multiple positive and negative direct current power supplys.
Optionally, the switch module includes half-bridge switch module or full-bridge switch module.The half-bridge switch module cost It is low, and full-bridge switch module is suitble to more large-power occasions.
Optionally, the half-bridge switch module includes two switching tubes；Described in the first end connection of switching tube described in one The output end of DC power supply, the corresponding resonance group of second end connection of switching tube described in one, the of switching tube described in one Two ends are also connected with the first end of another switching tube；The second end of another switching tube connects the input of the DC power supply End, the second end ground connection of another switching tube, the second end of another switching tube are also connected with the first of the corresponding transformer Grade side non-same polarity.
Optionally, the half-bridge switch module includes first switch tube, second switch, third switching tube, the 4th switch Pipe, first capacitor, the second capacitor, first diode and the second diode；The first end connection of the first switch tube is described straight The output end in galvanic electricity source, the second end of the first switch tube connect the first end of the second switch, the second switch The second end of pipe connects the first end of the third switching tube, and the second end of the third switching tube connects the 4th switching tube First end, the second end of the 4th switching tube connects the input terminal of the DC power supply, the second of the 4th switching tube End ground connection；One end of the first capacitor connects the first end of the first switch tube, and the other end of the first capacitor is through institute State the second end of the 4th switching tube described in the second capacitance connection；The cathode of the first diode connects the first switch tube Second end, the anode of the first diode connect the other end of the first capacitor, the anode connection of the first diode The cathode of second diode, the anode of second diode connect the second end of the third switching tube；Described second The corresponding resonance group of second end connection of switching tube, the anode of the first diode are also connected with the first of the corresponding transformer Grade side non-same polarity.
Optionally, the full-bridge switch module includes first switch tube, second switch, third switching tube and the 4th switch Pipe；The first end of the first switch tube connects the output end of the DC power supply, the second end connection of the first switch tube The first end of the second switch, the second end of the second switch connect the input terminal of the DC power supply, and described The second end of two switching tubes is grounded；The first end of the third switching tube connects the first end of the first switch tube, and described The second end of three switching tubes connects the first end of the 4th switching tube, the second end connection described second of the 4th switching tube The second end of switching tube；The corresponding resonance group of second end connection of the first switch tube, the second of the third switching tube The primary side non-same polarity of the corresponding transformer of end connection.
Optionally, the full-bridge switch module includes first switch tube, second switch, third switching tube, the 4th switch Pipe, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor, first diode and the second diode；Described first opens The first end for closing pipe connects the output end of the DC power supply, and the second end of the first switch tube connects the second switch First end, the second end of the second switch connects the first end of the third switching tube, the of the third switching tube Two ends connect the first end of the 4th switching tube, and the second end of the 4th switching tube connects the input of the DC power supply End, the second end ground connection of the 4th switching tube；The first end of 5th switching tube connects the first of the first switch tube End, the second end of the 5th switching tube connect the first end of the 6th switching tube, and the second end of the 6th switching tube connects Connect the second end of the 4th switching tube；One end of the first capacitor connects the first end of the first switch tube, and described Second end of the other end of one capacitor through the 4th switching tube described in second capacitance connection；The cathode of the first diode connects Connecing the second end of the first switch tube, the anode of the first diode connects the other end of the first capacitor, and described The anode of one diode is also connected with the cathode of second diode, and the anode of second diode connects the third switch The second end of pipe；The corresponding resonance group of second end connection of 5th switching tube, the second end of the second switch connect Connect the primary side non-same polarity of the corresponding transformer.
Optionally, the full-bridge switch module includes first switch tube, second switch, third switching tube, the 4th switch Pipe, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, first capacitor, the second capacitor, third capacitor, Four capacitors, first diode, the second diode, third diode and the 4th diode；The first end of the first switch tube connects The output end of the DC power supply is connect, the second end of the first switch tube connects the first end of the second switch, described The second end of second switch connects the first end of the third switching tube, the second end connection of the third switching tube described the The first end of four switching tubes, the second end of the 4th switching tube connect the input terminal of the DC power supply, the 4th switch The second end of pipe is grounded；One end of the first capacitor connects the first end of the first switch tube, the first capacitor it is another Second end of the one end through the 4th switching tube described in second capacitance connection；The cathode connection described first of the first diode The second end of switching tube, the anode of the first diode connect the other end of the first capacitor, the first diode Anode is also connected with the cathode of second diode, and the anode of second diode connects the second of the third switching tube End, the primary side non-same polarity of the corresponding transformer of second end connection of the second switch；
The first end of 5th switching tube connects the first end of the first switch tube, and the second of the 5th switching tube End connects the first end of the 6th switching tube, and the second end of the 6th switching tube connects the first of the 7th switching tube End, the second end of the 7th switching tube connect the first end of the 8th switching tube, and the second end of the 8th switching tube connects Connect the second end of the 4th switching tube；One end of the third capacitor connects the first end of the 5th switching tube, and described Second end of the other end of three capacitors through the 8th switching tube described in the 4th capacitance connection；The cathode of the third diode connects Connecing the second end of the 5th switching tube, the anode of the third diode connects the other end of the third capacitor, and described The anode of three diodes connects the cathode of the 4th diode, and the anode of the 4th diode connects the 7th switching tube Second end, the corresponding resonance group of second end connection of the 6th switching tube.
Optionally, first rectification module includes first diode and the second diode；The second rectification module packet Include third diode and the 4th diode；The third rectification module includes the 5th diode and the 6th diode；Described first Diode and second Diode series, the third diode and the 4th Diode series, the 5th diode It is mutual with the cathode of the 6th Diode series, the first diode, the third diode and the 5th diode The anode of connection, second diode, the 4th diode and the 6th diode is connected with each other, the two or two pole The plus earth of pipe；The primary side Same Name of Ends of anode first transformer of connection of the first diode, the third The primary side non-same polarity of the anode N/2 transformers of connection of diode, the anode connection N of the 5th diode The primary side non-same polarity of a transformer.
Optionally, the switching tube includes field effect transistor or insulated gate bipolar transistor, the first diode Field effect transistor or insulated gate bipolar transistor are replaced by least one diode of the 6th diode.
Optionally, the relay is replaced by two-way switch.
Optionally, the resonance group includes resonant inductance, magnetizing inductance and resonant capacitance；The primary side of the transformer is same Name end is connected to one end of the switch module through resonant capacitance, resonant inductance, and the primary side non-same polarity of the transformer connects It is connected to the other end of the switch module, is additionally provided with the magnetizing inductance between the primary side both ends of the transformer；Or
The primary side Same Name of Ends of the transformer is connected to one end of the switch module, and the primary side of the transformer is non- Same Name of Ends is connected to the other end of the switch module, the primary of the transformer through the resonant capacitance, the resonant inductance The magnetizing inductance is equipped between the both ends of side.
Optionally, the filter circuit includes filter capacitor, and one end of the filter capacitor connects the 5th diode Cathode, the other end of the filter capacitor connects the anode of the 6th diode.
Compared with prior art, the beneficial effects of the present invention are:
Switched in switching circuit in the case where relay closure by peripheral control unit based on above-mentioned controlled resonant converter Switching tube make the both sides transformer for being connected to relay the same end it is seamless between serial or parallel connection mode it is (continuous) conversion, into And make controlled resonant converter can output rated voltage nearby preset range voltage, it is below also to export 1/2 times of voltage rating Voltage, and the voltage range is continuously adjustable；In the case where relay disconnects, if the both sides for being connected to relay the same end become The primary side total voltage polarity of depressor is on the contrary, then the output voltage of controlled resonant converter is no-voltage, to expand current resonance change The output voltage range of parallel operation, especially invariable power voltage regulation limits not only realize continuous voltage transformation, also reduction relay The quantity of device reduces the volume of current controlled resonant converter to reduce the cost of current controlled resonant converter.
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is the circuit diagram of controlled resonant converter basic at present provided by the invention；
Fig. 2 is the circuit diagram of current controlled resonant converter provided by the invention；
Fig. 3 is the structural schematic diagram for the controlled resonant converter that the embodiment of the present invention one provides；
Fig. 4 is the structural schematic diagram one for the partial resonance converter that the embodiment of the present invention one provides；
Fig. 5 is the structural schematic diagram two for the partial resonance converter that the embodiment of the present invention one provides；
Fig. 6 is the structural schematic diagram one for the partial resonance converter that the embodiment of the present invention one provides；
Fig. 7 is the structural schematic diagram two for the partial resonance converter that the embodiment of the present invention one provides；
Fig. 8 is the circuit diagram one for the half-bridge switch module that the embodiment of the present invention one provides；
Fig. 9 is the circuit diagram two for the half-bridge switch module that the embodiment of the present invention one provides；
Figure 10 is the circuit diagram one for the controlled resonant converter that the embodiment of the present invention one provides；
Figure 11 is the circuit diagram two for the controlled resonant converter that the embodiment of the present invention one provides；
Figure 12 is the circuit diagram three for the controlled resonant converter that the embodiment of the present invention one provides；
Figure 13 is the circuit diagram one of full-bridge switch module provided by Embodiment 2 of the present invention；
Figure 14 is the circuit diagram two of full-bridge switch module provided by Embodiment 2 of the present invention；
Figure 15 is the circuit diagram three of full-bridge switch module provided by Embodiment 2 of the present invention；
Figure 16 is the circuit diagram of controlled resonant converter provided by Embodiment 2 of the present invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination Example.
Embodiment one
In order to solve, current controlled resonant converter constant power output voltage range is limited, output voltage range is discontinuous, cost It is high, volume is big, cannot export the problem of no-voltage, as shown in figure 3, present embodiments providing a kind of the humorous of series-parallel bumpless transfer Shake converter, including DC power supply, switching circuit, resonance circuit, rectification circuit and the filter circuit being sequentially connected electrically, filtering The output end of circuit is also connected with load；Switching circuit receives peripheral control unit control；Resonance circuit includes resonance modules and transformation Device module；Transformer module includes N number of transformer, and resonance modules include N group resonance group, and switching circuit includes N group switch module, N >=2 and N are even number；Rectification circuit includes the first rectification module, the second rectification module and third rectification module；Wherein,
The primary side Same Name of Ends of transformer is connected to one end of corresponding switch module, the primary of transformer through corresponding resonance group Side non-same polarity connects the other end of corresponding switch module；
If when N=2, the primary side Same Name of Ends of first transformer is connected to the bridge arm midpoint of the first rectification module, first The primary side non-same polarity of a transformer is connected with the primary side Same Name of Ends of second transformer, the primary side of second transformer Non-same polarity is connected to the bridge arm midpoint of the second rectification module, and it is whole that the primary side non-same polarity of first transformer is connected to third The bridge arm midpoint of flow module；
If N > 2 and N are even number, the primary side Same Name of Ends of first transformer is connected to the bridge arm of the first rectification module Midpoint, the primary side non-same polarity of first transformer are connected with the primary side Same Name of Ends of second transformer, adjacent transformers Primary side non-same polarity be connected with primary side Same Name of Ends, the primary side non-same polarity of n-th transformer is connected to the second rectification The primary side non-same polarity at the bridge arm midpoint of module, the N/2 transformer is connected to the bridge arm midpoint of third rectification module.
Based on above-mentioned controlled resonant converter, as N=2, transformer module includes two transformers, is cut by peripheral control unit The primary side of two transformers bumpless transfer between serial or parallel connection mode can be made by changing the switching tube in switching circuit, when two In series model, then the output voltage of controlled resonant converter is voltage rating for a transformer work；When two transformer work exist When paralleling model, then the output voltage of controlled resonant converter be 1/2 voltage rating；
As N > 2 and when N is even number, transformer module includes N number of transformer, switches switching circuit by peripheral control unit In switching tube first transformer to N/2 transformer and 1+ (N/2) a transformer to n-th transformer can be made to exist Bumpless transfer between serial or parallel connection mode, when first transformer to N/2 transformer and 1+ (N/2) a transformer extremely N-th transformer works in series model, then the output voltage of controlled resonant converter is higher than voltage rating；When first transformer It works to N/2 transformer and 1+ (N/2) a transformer to n-th transformer in paralleling model, then controlled resonant converter Output voltage be lower than 1/2 voltage rating.To expand the continuously adjustable output voltage range of current controlled resonant converter, also subtract The quantity of few relay, and then the cost of current controlled resonant converter is reduced, reduce the volume of current controlled resonant converter, in addition can also Realize that output is lower than 1/2 times of voltage rating.
In addition, as N=2, being led to based on the connection type for changing transformer module and rectification circuit in controlled resonant converter Cross peripheral control unit switching switching circuit in switching tube can make the primary side of two transformers serial or parallel connection mode it Between bumpless transfer, when the work of two transformers is in series model, output voltage becomes larger, and exports electric current and become smaller, then keeps exporting Power is constant；When two transformer work are in paralleling model, output voltage becomes smaller, and exports electric current and become larger, and still keeps output work Rate is constant；As N > 2 and when N is even number, first transformation can be made by switching the switching tube in switching circuit by peripheral control unit Device is to N/2 transformer and 1+ (N/2) a transformer to the primary side of n-th transformer between serial or parallel connection mode Bumpless transfer, when first transformer to N/2 transformer and 1+ (N/2) a transformer to n-th transformer work Series model, output voltage become larger, and export electric current and become smaller, then keep output power constant；When first transformer to N/2 A transformer and 1+ (N/2) a transformer to n-th transformer work in paralleling model, and output voltage becomes smaller, and exports electricity Rheology is big, still keeps output power constant；To be useful in the occasion of invariable power.
When transformer module includes two transformers, resonance modules include two groups of resonance groups, and switching circuit includes two groups and opens When closing module；As shown in figure 4, the primary side Same Name of Ends of transformer T1 is connected to first group of switch module through first group of resonance group One end, the primary side non-same polarity of transformer T1 are connected to the other end of first group of switch module, and the primary side of transformer T2 is same Name second group of end resonance group is connected to one end of second group of switch module, and the primary side non-same polarity of transformer T2 is connected to the The other end of two groups of switch modules；The primary side Same Name of Ends of transformer T1 is connected to the bridge arm midpoint of the first rectification module, transformation The primary side non-same polarity of device T1 is connected to the bridge arm midpoint of third rectification module, and the primary side non-same polarity of transformer T1 also connects The primary side Same Name of Ends of transformer T2 is connect, the primary side non-same polarity of transformer T2 is connected in the bridge arm of the second rectification module Point.
Include transformer T1 and transformer T2 based on transformer module, opening in switching circuit is switched by peripheral control unit Transformer T1 and transformer the T2 bumpless transfer between serial or parallel connection mode can be made by closing pipe, as transformer T1 and transformer T2 In series model, then the output voltage of controlled resonant converter is voltage rating for work；When transformer T1 and transformer T2 works When paralleling model, i.e., controlled resonant converter works in paralleling model, then the specified electricity that the output voltage of controlled resonant converter is 1/2 times Pressure；To not only expand its constant power output voltage range and continuous voltage regulating power, the quantity of relay is also reduced, And then the cost of entire controlled resonant converter is reduced, reduce the volume of entire controlled resonant converter.
When transformer module includes N number of transformer, resonance modules include N group resonance group, and switching circuit includes N group switching molding When block, wherein N > 2 and N are even number；As shown in figure 5, transformer module includes transformer T1, transformer T2, transformer The primary side Same Name of Ends of T3 ... .. transformer TN, transformer T1, T2 ... TN are respectively connected to corresponding through corresponding resonance group The primary side non-same polarity of one end of switch module, transformer T1, T2 ... TN is respectively connected to the another of corresponding switch module One end；The primary side Same Name of Ends of transformer T1 connects the bridge arm midpoint of the first rectification module, and the primary side of transformer T1 is non-of the same name The primary side of the primary side Same Name of Ends of end connection transformer T2, the primary side non-same polarity connection transformer T3 of transformer T2 is of the same name End, and so on, until the primary side Same Name of Ends of the primary side non-same polarity connection transformer TN of transformer TN-1, transformer TN Primary side non-same polarity connect the bridge arm midpoint of the second rectification module, the primary side non-same polarity of transformer TN/2 is connected to the The bridge arm midpoint of three rectification modules.
Based on above-mentioned controlled resonant converter, the switching tube in controlled resonant converter internal switching circuits is switched by peripheral control unit It can make transformer T1 to T2/N and transformer T1+ (N/2) to the TN bumpless transfer between serial or parallel connection mode, work as transformer T1 to T2/N and transformer T1+ (N/2) work to TN in series model, then the output voltage of controlled resonant converter is higher than specified electricity Pressure；When transformer T1 to T2/N and transformer T1+ (N/2) to TN work paralleling model, then the output voltage of controlled resonant converter Voltage rating lower than 1/2 times；To not only expand its constant power output voltage range and continuous voltage regulating power, also The quantity for reducing relay, reduces the cost of entire controlled resonant converter, reduces the volume of entire controlled resonant converter.
Further, as shown in fig. 6, if the primary side non-same polarity and third of first transformer T1 rectifies when N=2 Relay is equipped between the bridge arm midpoint of module；Or
As shown in fig. 7, if when N > 2 and N are even number, the primary side non-same polarity and third of the N/2 transformer TN/2 is whole Relay is equipped between the bridge arm midpoint of flow module.
Based on the resonance transformer, as N=2, transformer module includes two transformers, is disconnected in relay RY1 In the case of, if transformer T1 is opposite with the secondary-side voltage polarity of transformer T2 and voltage value is equal, make transformer T1 and transformation The secondary-side voltage of device T2 is cancelled out each other, then the output voltage of controlled resonant converter is no-voltage；
As N > 2 and when N is even number, transformer module includes N number of transformer, in the case where relay RY1 is disconnected, if The primary side total voltage of transformer T1 to transformer T2/N and transformer T1+ (N/2) to the primary side total voltage pole of transformer TN Property opposite and transformer T1 to transformer T2/N primary side total voltage value and transformer T1+ (N/2) to transformer TN secondary Side total voltage value is equal, makes the primary side total voltage of transformer T1 to transformer T2/N and transformer T1+ (N/2) to transformer TN Primary side total voltage cancel out each other, then controlled resonant converter export no-voltage.
As described above, the advantage of controlled resonant converter of the invention relative to controlled resonant converter in Fig. 2: 1, changing transformation The connection type (number and specification that do not change diode) of the device secondary side rectification circuit and number for reducing relay can be realized The wide scope constant power output function that Fig. 2 topology has, and the seamless handover function that Fig. 2 does not have may be implemented, due to Remove the larger and expensive relay of volume, thereby reduces cost；2, on the basis of changing rectification circuit increase by one after Electric appliance, it is 0 that output voltage, which may be implemented, in controlled resonant converter of the invention；3, it is useful in the wide model of output voltage variation 2 times or more Enclose the seamless occasion for adjusting invariable power and the occasion (such as near no-voltage) for needing to export ultra low voltage.
Further, DC power supply includes single DC power supply or multiple DC power supplies or multiple positive and negative direct current power supplys, root According to actual conditions demand, user can choose identical power voltage supply mode, different voltages power supply mode or generating positive and negative voltage supplier of electricity Formula is powered to switching circuit, and then the controlled resonant converter can be applied to more occasions by changing power supply mode by user, from And expand the application range of controlled resonant converter.
Further, peripheral control unit includes microcontroller or digital processing unit, and switching tube includes field effect in switching circuit Answer transistor (MOSFET) or insulated gate bipolar transistor (IGBT) or other electronic power switch pipes, relay RY1 can be with It is replaced by two-way switch, the diode in rectification circuit can be replaced by field effect transistor (MOSFET) or insulated gate bipolar Transistor (IGBT) or other electronic power switch pipes, when the diode in rectification circuit replaces with MOSFET, due to MOSFET can make the operating mode of controlled resonant converter can be more by the output voltage of control signal active control controlled resonant converter Horn of plenty may be implemented more flexible voltage-constrained mode, or realize more preferably Sofe Switch characteristic.And the present embodiment In peripheral control unit be microcontroller, switching tube is field effect transistor in switching circuit, i.e., switching tube is in switch module Field effect transistor.
Further, switch module includes half-bridge switch module or full-bridge switch module, and switch module in the present embodiment For half-bridge switch module, the half-bridge switch module is at low cost, and control is simple, and more flexible, and being equivalent to reduces entire resonance The cost of converter.
As described above, resonance modules include N group resonance group, N >=2 and N are even number, wherein resonance group includes resonance Inductance, magnetizing inductance and resonant capacitance；The primary side Same Name of Ends of transformer is connected to switch module through resonant capacitance, resonant inductance One end, the primary side non-same polarity of transformer is connected to the other end of switch module, between the primary side both ends of transformer also Equipped with magnetizing inductance；Or
The primary side Same Name of Ends of transformer is connected to one end of switch module, and the primary side non-same polarity of transformer is through resonance Capacitor, resonant inductance are connected to the other end of switch module, are equipped with magnetizing inductance between the primary side both ends of transformer.The resonance Module opens and shuts off the loss of generation for reducing switching tube in half-bridge switch module, to improve the effect of controlled resonant converter Rate.
As described above, half bridge switching circuit includes N group half-bridge switch module, N >=2 and N are even number；As shown in figure 8, Half-bridge switch module includes two switching tubes Q1, Q2；Two switching tubes Q1, Q2 are controlled by microcontroller；The first of switching tube Q1 The output end of end connection DC power supply, the second end of switching tube Q1 connect corresponding resonance group, more specifically, switching tube Q1's Second end connects corresponding resonant inductance, and the second end of switching tube Q1 is also also connected with the first end of switching tube Q2；The of switching tube Q2 Two ends connect the input terminal of DC power supply, the second end ground connection of switching tube Q2, and the second end of switching tube Q2 is also connected with corresponding change The primary side non-same polarity of depressor, the switching circuit are connected between the both sides transformer of relay the same end for seamless switching Serial or parallel connection mode, to change the output voltage of controlled resonant converter.
In addition, the manifestation mode of half-bridge switch module is not limited to the manifestation mode of Fig. 8, as shown in figure 9, half-bridge switch mould Block includes first switch tube Q1, second switch Q2, third switching tube Q3, the 4th switching tube Q4, first capacitor C1, the second capacitor C2, first diode D1 and the second diode D2；The conducting and closing of first switch tube Q1 to the 4th switching tube Q4 is by microcontroller Device control；The output end of the first end connection DC power supply of first switch tube Q1, the second end connection second of first switch tube Q1 The first end of switching tube Q2, the first end of the second end connection third switching tube Q3 of second switch Q2, third switching tube Q3's The first end of the 4th switching tube Q4 of second end connection, the input terminal of the second end connection DC power supply of the 4th switching tube Q4, the 4th The second end of switching tube Q4 is grounded；The first end of one end connection first switch tube Q1 of first capacitor C1, first capacitor C1's is another One end the second capacitor C2 is connected to the second end of the 4th switching tube Q4；The cathode of first diode D1 connects first switch tube Q1 Second end, first diode D1 anode connection first capacitor C1 the other end, first diode D1 anode connection second The cathode of diode D2, the second end of the anode connection third switching tube Q3 of the second diode D2；The second of second switch Q2 End connects corresponding resonance group, and more specifically, the second end of second switch Q2 connects corresponding resonant inductance, first diode The anode of D1 is also connected with the primary side non-same polarity of corresponding transformer.
As shown in figure 9, the half-bridge switch module belongs to common tri-level half-bridge switch module, there is this field profession often The people of knowledge can understand its working principle by simply deriving, wherein assuming that switching tube Q1, Q2 are simultaneously turned on, switching tube Q3, Q4 is simultaneously turned on, and switching tube Q1, Q2 and switching tube Q3, Q4 are respectively equivalent to a switching tube, therefore the half-bridge switch module Working method is similar with common half-bridge switch module (Fig. 8) under normal circumstances, its advantage is that the voltage stress of switching tube compares It is low, it is suitable for high pressure occasion；It is similar with the half-bridge switch module working principle that full-bridge switch module is described below, it is no longer superfluous It states.
By taking two half-bridges of identical power voltage supply as an example, as shown in Figure 10, DC power supply includes single DC power supply Vin； Half bridge switching circuit includes two groups of half-bridge switch modules, wherein one group of half-bridge switch module includes switching tube Q1, Q2, another group partly Bridge switch module includes switching tube Q3, Q4；Resonance modules include two groups of resonance groups, wherein one group of resonance group includes resonant capacitance C1, resonant inductance L1 and magnetizing inductance, another group of resonance group include resonant capacitance C2, resonant inductance L2 and magnetizing inductance；Transformation Device module includes transformer T1 and transformer T2；First rectification module includes first diode D1 and the second diode D2, and second Rectification module includes third diode D3 and the 4th diode D4, and third rectification module includes the 5th diode D5 and the six or two pole Pipe D6；Filter circuit includes filter capacitor C8；
The conducting of switching tube Q1, Q2, Q3, Q4 are controlled with closing by microcontroller, and the first end of switching tube Q1 connects direct current The output end of power supply Vin, the second end of switching tube Q1 be sequentially connected resonant inductance L1, resonant capacitance C1 connection transformer T1 just Grade side Same Name of Ends, the second end of switching tube Q1 are also connected with the first end of switching tube Q2, the second end ground connection of switching tube Q2, switching tube The second end of Q2 is also connected with the input terminal of DC power supply Vin, and the primary side that the second end of switching tube Q2 is also connected with transformer T1 is non- Same Name of Ends, the first end of the first end connection switch pipe Q1 of switching tube Q3, the second end connection of switching tube Q3 is successively through resonance electricity The primary side Same Name of Ends of sense L2, resonant capacitance C2 connection transformer T2, the first of the second end connection switch pipe Q4 of switching tube Q3 End, the second end of the second end connection switch pipe Q2 of switching tube Q4, the primary side of the second end connection transformer T2 of switching tube Q4 Non-same polarity is equipped with magnetizing inductance (in Figure 10 not between the primary side Same Name of Ends of transformer T1 and its primary side non-same polarity Draw), magnetizing inductance (not drawing in Figure 10) is equipped between the primary side Same Name of Ends of transformer T2 and its primary side non-same polarity；
The anode of the primary side Same Name of Ends connection first diode D1 of transformer T1, the primary side non-same polarity of transformer T1 Anode through the 5th diode D5 of relay RY1 connection, the primary side non-same polarity of transformer T1 are also connected with time of transformer T2 Grade side Same Name of Ends；The anode of the primary side non-same polarity connection third diode of transformer T2；
Wherein, first diode D1 connects with the second diode D2, and third diode D3 connects with the 4th diode D4, the Five diode D5 connect with the 6th diode D6, and first diode D1, the first third diode D3 and the 5th diode D5's is negative Pole is connected with each other, and the anode of the second diode D2, the 4th diode D4 and the 6th diode D6 are connected with each other, and the second diode The plus earth of D2；
One end of filter capacitor C8 connects the cathode of the 5th diode D5, and the other end of filter capacitor C8 connects the six or two pole The anode of pipe D6；The both ends of filter capacitor C8 are also connected in parallel on load RL.
LLC resonant converter working principle: assuming that switching tube Q1, switching tube Q2, resonant inductance L1, resonant capacitance C1, change Depressor T1 constitutes converter A；Become assuming that switching tube Q3, switching tube Q4, resonant inductance L2, resonant capacitance C2, transformer T2 are constituted Parallel operation B, wherein switching tube Q1 conducting complementary with switching tube Q2, switching tube Q3 conducting complementary with switching tube Q4.Do not considering dead zone In the case where time, each switching tube angle of flow is 180 degree, based on switching tube Q1 turn-on instant, if switching tube Q1 is connected Angle is 0 degree, and the angle of flow of switching tube Q2 is 180 degree, when microcontroller control switch pipe Q1 conducting synchronous with switching tube Q3, conducting Angle is 0 degree；When microcontroller control switch pipe Q2 conducting synchronous with switching tube Q4, the angle of flow is 180 degree；Simple analysis can Know, the secondary-side voltage of transformer T1 and transformer T2 is positive simultaneously or is negative simultaneously, at this time transformer T1 and transformer T2 Output voltage series connection, the 5th diode D5 and the 6th diode D6 do not turn on, be equivalent to and remove in circuit, if rectification filter Output voltage after wave is V1, it is known that V1 voltage is voltage rating in the ideal situation, and converter A and converter B is string at this time Gang mould formula；
When microcontroller control switch pipe Q1 conducting synchronous with switching tube Q4, the angle of flow is 0 degree；When microcontroller controls Switching tube Q2 conducting synchronous with switching tube Q3, the angle of flow is 180 degree；Simple analysis is it is found that transformer T1 and transformer T2 Secondary-side voltage polarity is opposite and voltage value is equal, if relay RY1 is in an off state down, be equivalent to the 5th diode D5 and 6th diode D6 is not present, and transformer T1 and the secondary-side voltage of transformer T2 are cancelled out each other, extremely by first diode D1 Output voltage after 4th diode D4 rectification is 0；If relay RY1 is under closed state, transformer T1 and transformer T2 Secondary-side voltage no longer cancel out each other, and it is (same to be converted into first diode D1 conducting synchronous with third diode D3 parallel connection When the 6th diode D6 be connected) or the second diode D2 is synchronous with the 4th diode D4 parallel connection that (while the 5th diode D5 is connected Conducting), it is equivalent to that transformer T1 is in parallel with the output voltage of transformer T2, if the output voltage after rectifying and wave-filtering is V2, it is known that V2 voltage is the half of voltage rating in the ideal case, and converter A and converter B is paralleling model at this time.
As described above, converter A is only that will open in converter B with connecting with paralleling model conversion for converter B The operating phase for closing pipe converts 180 degree, and there is no the operating frequency characteristics for changing LLC resonant converter, therefore without changing LLC The gain characteristic of controlled resonant converter.
In addition, as described above, first diode D1 can be replaced by the 6th diode D6 at least one diode Field effect transistor (MOSFET) or insulated gate bipolar transistor (IGBT) or other electronic power switch pipes, illustrate It is bright, when first diode to the 6th diode replaces with MOSFET, the function of reversible transducer may be implemented, keep energy two-way Flowing.
Under conditions of the working frequency of converter A and converter B will be consistent, if switching tube Q3 is relative to switching tube The operating phase of Q1 is between 0 degree between 180 degree, it is assumed that switching tube Q3 is 90 degree, 6 relative to the operating phase of switching tube Q1 Diode can be involved in work according to working condition in one cycle, and the output voltage of LLC resonant converter is between V1 at this time Between V2, since phase shift angle is continuously adjustable from 0 degree to 180 degree, which can realize output voltage from V1 To the continuously adjustable of V2, by theory analysis and emulation it is found that the working frequency of converter A and converter B can be set at this time In the resonance frequency of converter A, converter B, (resonance frequency refers to the LC resonance that resonant inductance L1 and resonant capacitance C1 are constituted Frequency, wherein the inductance value of resonant inductance L1 is equal with the inductance value of resonant inductance L2, the capacitance and resonance of resonant capacitance C1 The capacitance of capacitor C2 is equal；But working frequency is not limited in resonance frequency, can be higher or lower than resonance frequency), at this time Converter A and converter B is phase shift mode.
In the case that the above-mentioned output voltage for being merely assumed that LLC resonant converter works near resonance frequency, and then push away Leading to obtain the controlled resonant converter may be implemented range that output voltage is continuously adjusted in voltage rating to 1/2 times of voltage rating (i.e. Range is 1/2*VVolumeTo VVolume) in.
In the case where considering that output voltage may adjust near voltage rating, as shown in Figure 1, according to basic at present The working range of controlled resonant converter calculate, it is assumed that its input voltage is constant, at present the output voltage of basic controlled resonant converter Range is 0.8*VVolumeTo 1.2*VVolume, and LLC resonant converter of the invention is exported when relay RY1 is closed and is connected Voltage range will become 0.4*VVolumeTo 1.2*VVolume, and then extend 3 times of output voltage ranges.
It is important to note that controlled resonant converter is also known as topology, in actual engineering design, topology of the present invention The 5th diode D5, the 6th diode D6 in (Figure 10) are actually rule identical as first diode D1 to the 4th diode D4 Two diodes in parallel of lattice because by above-mentioned analysis it is found that in paralleling model the 5th diode D5, the 6th diode D6 The electric current flowed through is respectively equivalent to the 4th diode D4 of first diode D1+ third diode D3 and the second diode D2+ and flows through Electric current, therefore when actual design the topology output diode requirement be 8 rather than 6.By comparison diagram 2 it is found that this hair Bright is only to be changed 8 diode connection types of Fig. 2, and there is no the specifications for changing diode, but reduce relay The number of device, therefore the cost of topology is reduced, improve the performance of topology.
Its operating mode (by taking LLC resonant converter as an example) is analyzed below by way of specific value: when relay RY1 closure is led When logical, the output voltage adjustment process of LLC resonant converter is following (assuming that the output voltage adjustable range of the controlled resonant converter is wanted Seek 20V-60V): if setting output voltage 50V as the resonance point of series model, resonance point, that is, voltage rating point, by above Analysis it is found that V1=50V, then V2=50V/2=25V.When output voltage setting value is between 50V-60V, then transformation is enabled Device A and converter B works in series model, and the tune of output voltage is carried out by the working frequency for adjusting converter A and converter B Section, according to the gain characteristic of LLC resonant converter, when the working frequency of converter A and converter B is lower than resonance frequency (humorous At vibration frequency, the output voltage of LLC resonant converter is defined as voltage rating, when the corresponding gain of output voltage at this time is 1), Then the output voltage of the controlled resonant converter be higher than voltage rating, the corresponding gain of output voltage at this time be 1.2, at present it is basic The gain of controlled resonant converter is identical；When output voltage setting value is between 40V-50V, then converter A and converter B works The working frequency of series model, converter A and converter B are higher than resonance frequency, and the corresponding lowest gain of 40V voltage is 0.8；When When output voltage setting value is between 25V-30V, then converter A and converter B works in paralleling model, converter A and transformation The working frequency of device B is lower than resonance frequency, 25V, that is, aforementioned V2 voltage here, the half of 30V, that is, 60V；Similarly, when output electricity When pressure setting value is between 20V-25V, then converter A and converter B works in paralleling model, the work of converter A and converter B Working frequency is higher than resonance frequency；When output voltage setting value is between 30V-40V, converter A and converter B work in phase shift The working frequency of mode, converter A and converter B are equal to resonance frequency, and (it is resonance frequency that the frequency is not limited when practical application Rate).
By making a concrete analysis of above it is found that when voltage rating is 50V, the output of controlled resonant converter basic at present Voltage range is only 40V-60V (i.e. 0.8-1.2 times of gain regulating power), and the output voltage of controlled resonant converter of the invention can To realize the seamless adjusting of 20V-60V, its output voltage has been widened significantly；And the case where output voltage range is 20V-60V Under, keep output power constant, therefore controlled resonant converter of the invention is useful in the occasion of wide scope, continuously adjustable invariable power.
When microcontroller control relay RY1 is disconnected, by simple analysis it is found that if microcontroller still controls two Transformer works in paralleling model (i.e. two transformer phase 180 degrees), then the output voltage of LLC resonant converter is 0V.If Microcontroller controls two transformers and works in series model, then the output voltage of LLC resonant converter can arrive 60V.It is this In the case of, operating mode of the invention is similar to topology shown in Figure 11.
As shown in figure 11, the topology in Figure 11 is without the 5th diode D5, the 6th diode D6 and relay RY1, it is assumed that The number of diodes of Topology connection transformer secondary shown in the present invention and Figure 11 is all 8, and the present invention shown in Figure 11 with opening up The significant difference flutterred is: topology shown in 1. Figure 11 is actually that transformer always works at series model, when output voltage is low When exporting electric current big (constant output characteristic requirement), transformer primary side and vice-side winding line footpath are big；2. two transformations shown in Figure 11 Device always works at times voltage rating of phase shift mode, especially 1/2 in output rated voltage, and nearby phase shift angle is very big, this meeting Causing two field effect transistors of transformer primary side leading-bridge can not achieve, no-voltage is open-minded, two field-effects of lagging leg The cut-off current increasing of transistor is many times larger, has security risk, and at high cost；3. based on the above reasons, shown in Figure 11 Topological theory research is relatively more and engineering occurs in practice almost without product, and impracticable.
The present invention is with common ground topological shown in Figure 11: under 1. identical output voltage output current conditions, output two The total number and specification of pole pipe are the same (typically 8)；2. output voltage may be implemented in no-voltage to specified The seamless adjusting of voltage；3. all can not achieve constant power output (in fact, output electricity in 1/2 times of voltage rating following situations When pressing very low, near no-voltage, it is desirable that constant power output is unpractical)；4. control mode is similar when phase shift.
In addition, as shown in figure 12, DC power supply includes DC power supply by taking four half-bridges of different voltages power supply as an example Vin1,Vin2,Vin3,Vin4；Half bridge switching circuit includes four groups of half-bridge switch modules, and first group of half-bridge switch module includes opening Pipe Q1, Q2 are closed, second group of switch module includes switching tube Q3, Q4；Third group half-bridge switch module includes switching tube Q5, Q6, the Four groups of switch modules include switching tube Q7, Q8；Resonance modules include the first resonance group, the second resonance group, third resonance group and the Four resonance groups, the first resonance group include resonant inductance L1, resonant capacitance C1 and magnetizing inductance, and second group of resonance group includes resonance electricity Feeling L2, resonant capacitance C2 and magnetizing inductance, third resonance group includes resonant inductance L3, resonant capacitance C3 and magnetizing inductance, third Resonance group includes resonant inductance L4, resonant capacitance C4 and magnetizing inductance；Transformer module includes transformer T1, transformer T2, becomes Depressor T3 and transformer T4；First rectification module includes first diode D1 and the second diode D2, and the second rectification module includes Third diode D3 and the 4th diode D4, third rectification module include the 5th diode D5 and the 6th diode D6；Filtered electrical Road includes filter capacitor C8；
The conducting of switching tube Q1 to Q8 is controlled with closing by microcontroller, and the first end of switching tube Q1 connects DC power supply The output end of Vin1, the second end of the switching tube Q1 successively primary side through resonant inductance L1, resonant capacitance C1 connection transformer T1 Same Name of Ends, the second end of switching tube Q1 is also connected with the first end of switching tube Q2, at the beginning of the second end of switching tube Q2 connects transformer T1 Grade side non-same polarity, the second end of switching tube Q2 are grounded GND1, and the second end of switching tube Q2 is also connected with the defeated of DC power supply Vin1 Enter end；
The output end of the first end connection DC power supply Vin2 of switching tube Q3, the second end of switching tube Q3 is successively through resonance electricity Feel the primary side Same Name of Ends of L2, resonant capacitance C2 connection transformer T2, the second end of switching tube Q3 is also connected with the of switching tube Q4 One end, the primary side non-same polarity of the second end connection transformer T2 of switching tube Q4, the second end of switching tube Q4 are grounded GND2, open The second end for closing pipe Q4 is also connected with the input terminal of DC power supply Vin2；
The output end of the first end connection DC power supply Vin3 of switching tube Q5, the second end of switching tube Q5 is successively through resonance electricity Feel the primary side Same Name of Ends of L3, resonant capacitance C3 connection transformer T3, the second end of switching tube Q5 is also connected with the of switching tube Q6 One end, the primary side non-same polarity of the second end connection transformer T3 of switching tube Q6, the second end of switching tube Q6 are grounded GND3, open The second end for closing pipe Q6 is also connected with the input terminal of DC power supply Vin3；
The output end of the first end connection DC power supply Vin4 of switching tube Q7, the second end of switching tube Q7 is successively through resonance electricity Feel the primary side Same Name of Ends of L4, resonant capacitance C4 connection transformer T4, the second end of switching tube Q7 is also connected with the of switching tube Q8 One end, the primary side non-same polarity of the second end connection transformer T4 of switching tube Q8, the second end of switching tube Q8 are grounded GND4, open The second end for closing pipe Q8 is also connected with the input terminal of DC power supply Vin4；
Corresponding encourage is respectively equipped between the primary side Same Name of Ends of transformer T1, T2, T3, T4 and its primary side non-same polarity Magnetoelectricity sense (is not drawn) in Figure 12, the anode of the primary side Same Name of Ends connection first diode D1 of transformer T1, time of transformer T1 The primary side Same Name of Ends of grade side non-same polarity connection transformer T2, the primary side non-same polarity of transformer T2 connect through relay RY1 Connect the anode of the 5th diode D5, the primary side Same Name of Ends of the primary side non-same polarity connection transformer T3 of transformer T2, transformation The primary side Same Name of Ends of the primary side non-same polarity connection transformer T4 of device T3, the primary side non-same polarity connection the of transformer T4 The anode of three diodes；
Wherein, first diode D1 connects with the second diode D2, and third diode D3 connects with the 4th diode D4, the Five diode D5 connect with the 6th diode D6, and first diode D1, the first third diode D3 and the 5th diode D5's is negative Pole is connected with each other, and the anode of the second diode D2, the 4th diode D4 and the 6th diode D6 are connected with each other, and the second diode The plus earth of D2；
One end of filter capacitor C8 connects the cathode of the 5th diode D5, and the other end of filter capacitor C8 connects the six or two pole The anode of pipe D6；The both ends of filter capacitor C8 are also connected in parallel on load RL.
Above-mentioned DC power supply Vin1, Vin2, Vin3, Vin4 can provide identical voltage, different electricity to half-bridge switch module Pressure or different generating positive and negative voltages, the controlled resonant converter is identical as a upper LLC resonant converter working principle, and details are not described herein again.
Embodiment two
The difference between this embodiment and the first embodiment lies in switch module includes full-bridge switch module, full-bridge switch module and half Bridge switch module is compared, and full-bridge switch module is suitble to more powerful occasion.
Wherein, there are many kinds of the selection modes of full-bridge switch module, as shown in figure 13, full-bridge switch module is opened including first Close pipe Q1, second switch Q2, third switching tube Q3 and the 4th switching tube Q4；First switch tube Q1 is led to the 4th switching tube Q4's It is logical to be controlled with closure by microcontroller；The output end of the first end connection DC power supply of first switch tube Q1, first switch tube Q1 Second end connection second switch Q2 first end, the input terminal of the second end connection DC power supply of second switch Q2, the The second end of two switching tube Q2 is grounded；The first end of the first end connection first switch tube Q1 of third switching tube Q3, third switch The second end of pipe Q3 connects the first end of the 4th switching tube Q4, and the of the second end connection second switch Q2 of the 4th switching tube Q4 Two ends；The second end of first switch tube Q1 connects corresponding resonance group, and more specifically, the second end of first switch tube Q1 connects Corresponding resonant inductance, the primary side non-same polarity of the corresponding transformer of second end of third switching tube Q3.The full-bridge switch module Belong to the simplest full-bridge switch module of connection type, low cost, wide application is general.
As shown in figure 14, full-bridge switch module includes first switch tube Q1, second switch Q2, third switching tube Q3, Four switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6, first capacitor C1, the second capacitor C2, first diode D1 and second Diode D2；First switch tube Q1 to the 6th switching tube Q6 conducting is controlled with closing by microcontroller, wherein first switch tube Q1 First end connection DC power supply output end, the first end of the second end connection second switch Q2 of first switch tube Q1, the The first end of the second end connection third switching tube Q3 of two switching tube Q2, the second end of third switching tube Q3 connect the 4th switching tube The first end of Q4, the input terminal of the second end connection DC power supply of the 4th switching tube Q4, the second end ground connection of the 4th switching tube Q4； The first end of the first end connection first switch tube Q1 of 5th switching tube Q5, the 6th switch of second end connection of the 5th switching tube Q5 The first end of pipe Q6, the second end of the 6th switching tube Q6 connect the second end of the 4th switching tube Q4；One end of first capacitor C1 connects The first end of first switch tube Q1 is connect, the other end of first capacitor C1 is through the second of the 4th switching tube Q4 of the second capacitor C2 connection End；The second end of the cathode connection first switch tube Q1 of first diode D1, the anode connection first capacitor of first diode D1 The other end of C1；The anode of first diode D1 is also connected with the cathode of the second diode D2, the anode connection of the second diode D2 The second end of third switching tube Q3；The second end of 5th switching tube Q5 connects corresponding resonance group, more specifically, the 5th switch The second end of pipe Q5 connects corresponding resonant inductance, and the primary side of the second end connection transformer of second switch Q2 is non-of the same name End.For the full-bridge switch module compared with the full-bridge switch module of other connection types, advantage control mode is more, more clever It is living.
As shown in figure 15, full-bridge switch module includes first switch tube Q1, second switch Q2, third switching tube Q3, Four switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6, the 7th switching tube Q7, the 8th switching tube Q8, first capacitor C1, Two capacitor C2, third capacitor C3, the 4th capacitor C4, first diode D1, the second diode D2, third diode D3 and the four or two Pole pipe D4；The conducting of first switch tube Q1 to the 8th switching tube Q8 or closure are controlled by microcontroller；Wherein, first switch tube Q1 First end connection DC power supply output end, the first end of the second end connection second switch Q2 of first switch tube Q1, the The first end of the second end connection third switching tube Q3 of two switching tube Q2, the second end of third switching tube Q3 connect the 4th switching tube The first end of Q4, the input terminal of the second end connection DC power supply of the 4th switching tube Q4, the second end ground connection of the 4th switching tube Q4； The first end of one end connection first switch tube Q1 of first capacitor C1, the other end of first capacitor C1 is through the second capacitor C2 connection the The second end of four switching tube Q4；The second end of the cathode connection first switch tube Q1 of first diode D1, first diode D1's The other end of anode connection first capacitor C1, the anode of first diode D1 are also connected with the cathode of the second diode D2, and the two or two The second end of the anode connection third switching tube Q3 of pole pipe D2, the second end of second switch Q2 connect the first of corresponding transformer Grade side non-same polarity；
The first end of the first end connection first switch tube Q1 of 5th switching tube Q5, the second end connection of the 5th switching tube Q5 The first end of 6th switching tube Q6, the second end of the 6th switching tube Q6 connect the first end of the 7th switching tube Q7, the 7th switching tube The second end of Q7 connects the first end of the 8th switching tube Q8, and the second end of the 8th switching tube Q8 connects the second of the 4th switching tube Q4 End；One end of third capacitor C3 connects the first end of the 5th switching tube Q5, and the other end of third capacitor C3 connects through the 4th capacitor C4 Connect the second end of the 8th switching tube Q8；The cathode of third diode D3 connects the second end of the 5th switching tube Q5, third diode The other end of the anode connection third capacitor C3 of D3, the cathode of the 4th diode D4 of anode connection of third diode D3, the 4th The second end of the 7th switching tube Q7 of anode connection of diode D4, the second end of the 6th switching tube Q6 connect corresponding resonance group, The second end of 6th switching tube Q6 connects corresponding resonant inductance.The full-bridge switch of the full-bridge switch module and other connection types Module is compared, and advantage can be applicable in higher voltage, more powerful occasion.
The connection type of above-mentioned full-bridge switch module is not limited to the connection type of Figure 13,14,15, no longer multiple superfluous herein It states.
By different voltages power supply two full-bridges for, as shown in figure 16, DC power supply include DC power supply Vin1, Vin2, full bridge switching circuit include two groups of full-bridge switch modules, and one full-bridge switch module includes first switch tube Q11, second Switching tube Q12, third switching tube Q13, the 4th switching tube Q14, another full-bridge switch module include first switch tube Q21, second Switching tube Q22, third switching tube Q23, the 4th switching tube Q24,
Resonance modules include two groups of resonance groups, wherein one group of resonance group includes resonant capacitance C1, resonant inductance L1 and excitation Inductance, another group of resonance group include resonant capacitance C2, resonant inductance L2 and magnetizing inductance, transformer module include transformer T1 and Transformer T2；First rectification module includes first diode D1 and the second diode D2, and the second rectification module includes the three or two pole Pipe D3 and the 4th diode D4, third rectification module include the 5th diode D5 and the 6th diode D6；Filter circuit includes filter Wave capacitor C8；
The first end of the output end connection first switch tube Q11 of DC power supply Vin1, the second end of first switch tube Q11 according to The primary side Same Name of Ends of secondary connection resonant inductance L1, resonant capacitance C1 connection transformer T1, the second end of first switch tube Q11 is also The first end of second switch Q12 is connected, the second end of second switch Q12 is grounded GND1, the second end of second switch Q12 Connect the input terminal of DC power supply Vin1, the first end of the first end connection first switch tube Q11 of third switching tube Q13, third The primary side non-same polarity of the second end connection transformer T1 of switching tube Q13, the second end connection second of the 4th switching tube Q14 are opened Close the second end of pipe Q12；
The first end of the output end connection first switch tube Q21 of DC power supply Vin2, the second end of first switch tube Q21 according to The primary side Same Name of Ends of secondary connection resonant inductance L2, resonant capacitance C2 connection transformer T2, the second end of first switch tube Q21 is also The first end of second switch Q22 is connected, the second end of second switch Q22 is grounded GND2, the second end of second switch Q22 The input terminal of the Vin2 of DC power supply is connected, the first end of third switching tube Q23 connects the first end of first switch tube Q21, the The primary side non-same polarity of the second end connection transformer T1 of three switching tube Q23, the second end connection the 4th of third switching tube Q23 The first end of switching tube Q24, the second end of the second end connection second switch Q22 of the 4th switching tube Q24；
Corresponding magnetizing inductance (Figure 16 is equipped between the primary side Same Name of Ends of transformer T1, T2 and primary side non-same polarity In do not draw), the anode of the primary side Same Name of Ends of transformer T1 connection first diode D1, the primary side non-same polarity of transformer T1 The anode of the 5th diode D5 is connected, the primary side non-same polarity of transformer T1 is also connected with the primary side Same Name of Ends of transformer T2； The anode of the primary side non-same polarity connection third diode D3 of transformer T2；
Wherein, first diode D1 connects with the second diode D2, and third diode D3 connects with the 4th diode D4, the Five diode D5 connect with the 6th diode D6, and first diode D1, the first third diode D3 and the 5th diode D5's is negative Pole is connected with each other, and the anode of the second diode D2, the 4th diode D4 and the 6th diode D6 are connected with each other, and the second diode The plus earth of D2；
One end of filter capacitor C8 connects the cathode of the 5th diode D5, and the other end of filter capacitor C8 connects the six or two pole The anode of pipe D6；The both ends of filter capacitor C8 are also connected in parallel on load RL.
Above-mentioned DC power supply Vin1, Vin2 can provide identical voltage, different voltages or difference to full-bridge switch module just The working principle of negative voltage, the controlled resonant converter is similar to the working principle of the LLC resonant converter of embodiment one, herein no longer It repeats.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto, The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention Claimed range.

Claims (13)

1. a kind of controlled resonant converter of series-parallel bumpless transfer, including DC power supply, switching circuit, the resonance electricity being sequentially connected electrically Road, rectification circuit and filter circuit；The switching circuit receives peripheral control unit control；It is characterized in that, the resonance electricity Road includes resonance modules and transformer module, and the transformer module includes N number of transformer, and the resonance modules include that N group is humorous Vibration group, the switching circuit include N group switch module, and N >=2 and N are even number；The rectification circuit include the first rectification module, Second rectification module and third rectification module；Wherein,
The primary side Same Name of Ends of the transformer is connected to one end of the corresponding switch module through the correspondence resonance group, described The primary side non-same polarity of transformer is connected to the other end of the corresponding switch module；
If when N=2, the primary side Same Name of Ends of first transformer is connected to the bridge arm midpoint of first rectification module, The primary side non-same polarity of first transformer is connected with the primary side Same Name of Ends of second transformer, second institute The primary side non-same polarity for stating transformer is connected to the bridge arm midpoint of second rectification module, time of first transformer Grade side non-same polarity is connected to the bridge arm midpoint of the third rectification module；Or
If N > 2 and N are even number, the primary side Same Name of Ends of first transformer is connected to first rectification module Bridge arm midpoint, the primary side Same Name of Ends phase of the primary side non-same polarity of first transformer and second transformer Even, the primary side non-same polarity of the adjacent transformer is connected with primary side Same Name of Ends, and the primary side of transformer described in n-th is non- Same Name of Ends is connected to the bridge arm midpoint of second rectification module, the primary side non-same polarity connection of the N/2 transformers To the bridge arm midpoint of the third rectification module.
2. controlled resonant converter according to claim 1, which is characterized in that if when N=2, time of first transformer Relay is equipped between grade side non-same polarity and the bridge arm midpoint of the third rectification module；Or
If N > 2 and N are even number, the primary side non-same polarity of N/2 transformers and the bridge of the third rectification module Relay is equipped between arm midpoint.
3. controlled resonant converter according to claim 1 or 2, which is characterized in that the DC power supply includes single direct current Source or multiple DC power supplies or multiple positive and negative direct current power supplys.
4. controlled resonant converter according to claim 1, which is characterized in that the switch module include half-bridge switch module or Full-bridge switch module.
5. controlled resonant converter according to claim 3, which is characterized in that the switch module include half-bridge switch module or Full-bridge switch module.
6. controlled resonant converter according to claim 4, which is characterized in that the half-bridge switch module includes two switches Pipe；The first end of switching tube described in one connects the output end of the DC power supply, the second end connection of switching tube described in one The resonance group is corresponded to, the second end of switching tube described in one is also connected with the first end of another switching tube；It is opened described in another The second end for closing pipe connects the input terminal of the DC power supply, the second end ground connection of another switching tube, another switch The second end of pipe is also connected with the primary side non-same polarity of the corresponding transformer.
7. controlled resonant converter according to claim 4, which is characterized in that the half-bridge switch module includes first switch Pipe, second switch, third switching tube, the 4th switching tube, first capacitor, the second capacitor, first diode and the second diode； The first end of the first switch tube connects the output end of the DC power supply, described in the second end connection of the first switch tube The first end of second switch, the second end of the second switch connect the first end of the third switching tube, the third The second end of switching tube connects the first end of the 4th switching tube, and the second end of the 4th switching tube connects the direct current The input terminal in source, the second end ground connection of the 4th switching tube；One end of the first capacitor connects the first switch tube First end, the other end of the first capacitor is through the second end of the 4th switching tube described in second capacitance connection；Described first The cathode of diode connects the second end of the first switch tube, and the anode of the first diode connects the first capacitor The other end, the anode of the first diode connect the cathode of second diode, the anode connection of second diode The second end of the third switching tube；The corresponding resonance group of second end connection of the second switch, the one or two pole The anode of pipe is also connected with the primary side non-same polarity of the corresponding transformer.
8. controlled resonant converter according to claim 4, which is characterized in that the full-bridge switch module includes first switch Pipe, second switch, third switching tube and the 4th switching tube；The first end of the first switch tube connects the DC power supply Output end, the second end of the first switch tube connect the first end of the second switch, and the second of the second switch End connects the input terminal of the DC power supply, the second end ground connection of the second switch；The first end of the third switching tube The first end of the first switch tube is connected, the second end of the third switching tube connects the first end of the 4th switching tube, The second end of 4th switching tube connects the second end of the second switch；The second end connection pair of the first switch tube Answer the resonance group, the primary side non-same polarity of the corresponding transformer of second end connection of the third switching tube.
9. controlled resonant converter according to claim 4, which is characterized in that the full-bridge switch module includes first switch Pipe, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, first capacitor, the second capacitor, First diode and the second diode；The first end of the first switch tube connects the output end of the DC power supply, and described The second end of one switching tube connects the first end of the second switch, and the second end of the second switch connects the third The first end of switching tube, the second end of the third switching tube connect the first end of the 4th switching tube, the 4th switch The second end of pipe connects the input terminal of the DC power supply, the second end ground connection of the 4th switching tube；5th switching tube First end connect the first end of the first switch tube, the second end of the 5th switching tube connects the 6th switching tube The second end of first end, the 6th switching tube connects the second end of the 4th switching tube；One end of the first capacitor connects The first end of the first switch tube is connect, the other end of the first capacitor is through the 4th switching tube described in second capacitance connection Second end；The cathode of the first diode connects the second end of the first switch tube, the anode of the first diode The other end of the first capacitor is connected, the anode of the first diode is also connected with the cathode of second diode, described The anode of second diode connects the second end of the third switching tube；Described in the second end connection of 5th switching tube is corresponding Resonance group, the primary side non-same polarity of the corresponding transformer of second end connection of the second switch.
10. controlled resonant converter according to claim 4, which is characterized in that the full-bridge switch module includes first switch Pipe, second switch, third switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switch Pipe, first capacitor, the second capacitor, third capacitor, the 4th capacitor, first diode, the second diode, third diode and the 4th Diode；The first end of the first switch tube connects the output end of the DC power supply, the second end of the first switch tube The first end of the second switch is connected, the second end of the second switch connects the first end of the third switching tube, The second end of the third switching tube connects the first end of the 4th switching tube, and the second end of the 4th switching tube connects institute State the input terminal of DC power supply, the second end ground connection of the 4th switching tube；One end connection described first of the first capacitor The first end of switching tube, the other end of the first capacitor is through the second end of the 4th switching tube described in second capacitance connection； The cathode of the first diode connects the second end of the first switch tube, the anode connection of the first diode described the The other end of one capacitor, the anode of the first diode are also connected with the cathode of second diode, second diode Anode connect the second end of the third switching tube, the corresponding transformer of second end connection of the second switch just Grade side non-same polarity；
The first end of 5th switching tube connects the first end of the first switch tube, and the second end of the 5th switching tube connects The first end of the 6th switching tube is connect, the second end of the 6th switching tube connects the first end of the 7th switching tube, institute The second end for stating the 7th switching tube connects the first end of the 8th switching tube, described in the second end connection of the 8th switching tube The second end of 4th switching tube；One end of the third capacitor connects the first end of the 5th switching tube, the third capacitor Second end of the other end through the 8th switching tube described in the 4th capacitance connection；Described in the cathode connection of the third diode The second end of 5th switching tube, the anode of the third diode connect the other end of the third capacitor, the three or two pole The anode of pipe connects the cathode of the 4th diode, and the anode of the 4th diode connects the second of the 7th switching tube End, the corresponding resonance group of second end connection of the 6th switching tube.
11. controlled resonant converter according to claim 6, which is characterized in that first rectification module includes the one or two pole Pipe and the second diode；Second rectification module includes third diode and the 4th diode；The third rectification module packet Include the 5th diode and the 6th diode；The first diode and second Diode series, the third diode with 4th Diode series, the 5th diode and the 6th Diode series, the first diode, the third The cathode of diode and the 5th diode is connected with each other, second diode, the 4th diode and the described 6th The anode of diode is connected with each other, the plus earth of second diode；The anode connection first of the first diode The primary side of the primary side Same Name of Ends of the transformer, the anode N/2 transformers of connection of the third diode is non- Same Name of Ends, the anode of the 5th diode connect the primary side non-same polarity of transformer described in n-th.
12. controlled resonant converter according to claim 11, which is characterized in that the switching tube include field effect transistor or Insulated gate bipolar transistor, the first diode at least one diode of the 6th diode are replaced by field-effect crystalline substance Body pipe or insulated gate bipolar transistor.
13. controlled resonant converter according to claim 2, which is characterized in that the relay is replaced by two-way switch.
CN201811649059.8A 2018-12-30 2018-12-30 A kind of controlled resonant converter of series-parallel bumpless transfer Pending CN109687716A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110138239A (en) * 2019-05-20 2019-08-16 深圳市优优绿能电气有限公司 A kind of wide scope invariable power converter circuit
CN110880873A (en) * 2019-12-03 2020-03-13 浙江大学 LLC resonant converter resonant cavity switching device and control method
CN112366950A (en) * 2020-11-02 2021-02-12 湖南大学 Electrodeless control series/parallel bidirectional power circuit and control method thereof
CN113271029A (en) * 2021-05-28 2021-08-17 青岛大学 DAB type single-stage bidirectional AC/DC converter with low voltage stress and wide output range
CN113556040A (en) * 2021-07-29 2021-10-26 石家庄通合电子科技股份有限公司 Multichannel LLC resonant transformation ware, resonant transformation ware circuit and fill electric pile
CN113841316A (en) * 2021-02-05 2021-12-24 华为数字能源技术有限公司 Charging circuit and charging device
CN114172377A (en) * 2021-11-03 2022-03-11 康舒科技股份有限公司 Power converter with voltage output modulation
CN114244122A (en) * 2021-11-24 2022-03-25 北京动力源科技股份有限公司 Half-bridge LLC constant-power wide-range converter topology and circuit
CN114244123A (en) * 2021-11-24 2022-03-25 北京动力源科技股份有限公司 Full-bridge LLC constant-power wide-range converter topology and circuit
CN115473442A (en) * 2022-11-15 2022-12-13 四川大学 Numerical analysis modeling and boundary power control method for LLC single-stage AC-DC converter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103856089A (en) * 2014-03-26 2014-06-11 南京理工大学 High-frequency isolation-type five-level inverter
CN104201900A (en) * 2014-09-18 2014-12-10 南京航空航天大学 Resonant converter and method for controlling same
CN106655793A (en) * 2017-02-07 2017-05-10 南京航空航天大学 Common resonant inductor type wide-input-range LLC resonant converter
CN107846151A (en) * 2017-11-15 2018-03-27 华中科技大学 A kind of efficient vehicle-mounted charge converter
CN108258909A (en) * 2017-12-22 2018-07-06 华为技术有限公司 Resonant transform circuit and its control method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103856089A (en) * 2014-03-26 2014-06-11 南京理工大学 High-frequency isolation-type five-level inverter
CN104201900A (en) * 2014-09-18 2014-12-10 南京航空航天大学 Resonant converter and method for controlling same
CN106655793A (en) * 2017-02-07 2017-05-10 南京航空航天大学 Common resonant inductor type wide-input-range LLC resonant converter
CN107846151A (en) * 2017-11-15 2018-03-27 华中科技大学 A kind of efficient vehicle-mounted charge converter
CN108258909A (en) * 2017-12-22 2018-07-06 华为技术有限公司 Resonant transform circuit and its control method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
QI CAO ET AL: "Wide Voltage Gain Range LLC DC/DC Topologies: State-of-the-Art", 《《THE 2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE》》 *
詹小海: "串并联自调整式LLC谐振变换器的研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》, pages 2 - 3 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110138239A (en) * 2019-05-20 2019-08-16 深圳市优优绿能电气有限公司 A kind of wide scope invariable power converter circuit
CN110880873A (en) * 2019-12-03 2020-03-13 浙江大学 LLC resonant converter resonant cavity switching device and control method
CN112366950A (en) * 2020-11-02 2021-02-12 湖南大学 Electrodeless control series/parallel bidirectional power circuit and control method thereof
CN113841316A (en) * 2021-02-05 2021-12-24 华为数字能源技术有限公司 Charging circuit and charging device
CN113271029A (en) * 2021-05-28 2021-08-17 青岛大学 DAB type single-stage bidirectional AC/DC converter with low voltage stress and wide output range
CN113556040A (en) * 2021-07-29 2021-10-26 石家庄通合电子科技股份有限公司 Multichannel LLC resonant transformation ware, resonant transformation ware circuit and fill electric pile
CN114172377A (en) * 2021-11-03 2022-03-11 康舒科技股份有限公司 Power converter with voltage output modulation
CN114172377B (en) * 2021-11-03 2024-02-09 康舒科技股份有限公司 Power converter with voltage output modulation
CN114244122A (en) * 2021-11-24 2022-03-25 北京动力源科技股份有限公司 Half-bridge LLC constant-power wide-range converter topology and circuit
CN114244123A (en) * 2021-11-24 2022-03-25 北京动力源科技股份有限公司 Full-bridge LLC constant-power wide-range converter topology and circuit
CN115473442A (en) * 2022-11-15 2022-12-13 四川大学 Numerical analysis modeling and boundary power control method for LLC single-stage AC-DC converter
CN115473442B (en) * 2022-11-15 2023-01-31 四川大学 LLC single-stage AC-DC converter numerical analysis modeling and boundary power control method

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