CN108173433A - A kind of crisscross parallel controlled resonant converter and control method - Google Patents
A kind of crisscross parallel controlled resonant converter and control method Download PDFInfo
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- CN108173433A CN108173433A CN201810020273.0A CN201810020273A CN108173433A CN 108173433 A CN108173433 A CN 108173433A CN 201810020273 A CN201810020273 A CN 201810020273A CN 108173433 A CN108173433 A CN 108173433A
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- 238000000034 method Methods 0.000 title claims description 8
- 238000004804 winding Methods 0.000 claims abstract description 41
- 238000013519 translation Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 61
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
- H02M3/33592—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 having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/4815—Resonant converters
- H02M7/4818—Resonant converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of crisscross parallel controlled resonant converter, including：First translation circuit, including the first dc bus and three pairs of first switch groups being arranged in parallel between the first dc bus；Second translation circuit, including the second dc bus and three pairs of second switch groups being arranged in parallel between the second dc bus；Three transformers connect the first translation circuit and the second translation circuit；Resonance circuit is correspondingly connected with a transformer and a first switch group；Wherein, resonance circuit includes an inductance and a pair of series capacitance, between the first dc bus, inductance first end is connected between the controlled tr tube of two series connection of a first switch group a pair of series capacitance connection, and inductance second end connects a transformer primary side winding first end.The present invention using three staggered symmetrical LLC, can autonomous completion flow；It is integrated with reference to magnetic, with raising efficiency, can further reduce the total volume of magnetic element.
Description
Technical field
The invention belongs to DC voltage conversion technical field, particularly a kind of crisscross parallel controlled resonant converter and controlling party
Method.
Background technology
At present, single-phase series resonant cavity enhanced photodetector is a kind of common efficient reversible transducer.Due to the bidirectional transducer
Based on series resonant converter principle, thus there are the capacitance ripple current of battery side it is big the shortcomings that.In order to eliminate battery side
Capacitance ripple current, either from the capacitance of battery side to the boosting of the capacitance of dc bus side still from dc bus side
For capacitance to the decompression of the capacitance of battery side, the two capacitances are required for the capacitance of larger capacity in parallel, and wave filter volume is caused to become
Greatly, particularly in during high-power classes of applications, since the ripple current problem of low-pressure side can become more prominent, it is then desired to
The capacitance of more capacity in parallel causes wave filter volume is big to obtain the high density designs that will be unfavorable for power supply.
In order to reduce the ripple current of the capacitance of low-pressure side (i.e. filter capacitor), in the prior art, patent, resonance are disclosed
Converter and uninterrupted power supply and control method, publication No. CN103683964A, by using three-phase crisscross parallel resonance
The resonator of technology overcomes the big inherent defect of controlled resonant converter ripple current, effectively reduces and then reduces filtered electrical
The volume of appearance improves the power density of power supply.
But in this supply unit, the structure of use is two-way three staggered asymmetry LLC, and staggeredly the stream of LLC is asked
Topic is not well solved always.
Invention content
For above-mentioned technical problem, the invention discloses a kind of crisscross parallel controlled resonant converter and control method, using three
Staggered symmetrical LLC, can autonomous completion flow；It is integrated with reference to magnetic, can magnetic element further be reduced with raising efficiency
Total volume.
In order to realize purpose according to the present invention, a kind of crisscross parallel controlled resonant converter is provided, including：
First translation circuit, including the first dc bus and three couple being arranged in parallel between first dc bus
First switch group, the first switch group are made of the controlled tr tube of two series connection, are connected between first dc bus
There is one first bus capacitor；
Second translation circuit, including the second dc bus and three couple being arranged in parallel between second dc bus
Second switch group, the second switch group are made of the controlled tr tube of two series connection, are connected between second dc bus
There is one second bus capacitor；
Three transformers connect first translation circuit and the second translation circuit；And
Three resonance circuits are arranged on first translation circuit, and a resonance circuit is correspondingly connected with described in one
Transformer and a first switch group；
Wherein, the resonance circuit includes an inductance and a pair of series capacitance, and a pair of series capacitance connection is described the
Between one dc bus, the inductance first end is connected between the controlled tr tube of two series connection of a first switch group,
The inductance second end connects a transformer primary side winding first end, which is connected to one
Between series capacitance, which is connected to the controllable switch of two series connection of a second switch group
Between pipe, the vice-side winding second end of each transformer connects altogether.
Preferably, the controlled tr tube is semiconductor switch.
Preferably, a controlled tr tube both ends backward dioded in parallel.
Preferably, first pair of first switch group is made of the first controllable switch Q1 to connect and the second controllable switch Q2, the
Two pairs of first switch groups are made of the third controllable switch Q3 to connect and the 4th controllable switch Q4, and third is to first switch group by
Five controllable switch Q5 and the 6th controllable switch Q6 compositions；
First pair of series capacitance is made of the first capacitance Cr11 to connect and the second capacitance Cr12；Second pair of series capacitance by
Third capacitance Cr21 and the 4th capacitance the Cr22 composition of series connection；Third is to series capacitance by the 5th capacitance Cr31 to connect and the 6th
Capacitance Cr32 is formed；
Wherein, first inductance Lr1 first end is connected between the first controllable switch Q1 and the second controllable switch Q2, and first
A inductance Lr1 second ends are connected to first transformer Tr1 primary side winding first end, first transformer Tr1 primary side winding
Two ends are connected between the first capacitance Cr11 and the second capacitance Cr12；
Second inductance Lr2 first end is connected between third controllable switch Q3 and the 4th controllable switch Q4, second electricity
Sense Lr2 second ends are connected to second transformer Tr2 primary side winding first end, second transformer Tr2 primary side winding second end
It is connected between third capacitance Cr21 and the 4th capacitance Cr22；
Third inductance Lr3 first ends are connected between the 5th controllable switch Q5 and the 6th controllable switch Q6, third electricity
Sense Lr3 second ends are connected to third transformer Tr3 primary side winding first ends, third transformer Tr3 primary side winding second ends
It is connected between the 5th capacitance Cr31 and the 6th capacitance Cr32.
Preferably, first pair of second switch group is made of the 7th controllable switch Q7 to connect and the 8th controllable switch Q8, the
Two pairs of second switch groups are made of the 9th controllable switch Q9 to connect and the tenth controllable switch Q10, third to second switch group by
11st controllable switch Q11 and the 12nd controllable switch Q12 compositions；
Wherein, first transformer Tr1 vice-side winding first end is connected to the 7th controllable switch Q7 and the 8th controllable switch
Between Q8, second transformer Tr2 vice-side winding first end be connected to the 9th controllable switch Q9 and the tenth controllable switch Q10 it
Between, third transformer Tr3 vice-side winding first ends be connected to the 11st controllable switch Q11 and the 12nd controllable switch Q12 it
Between, first transformer Tr1, second transformer Tr2 and third transformer Tr3 vice-side winding second ends connect altogether.
Preferably, a controller is further included, the controller is used to control the turn-on and turn-off of each controlled tr tube, together
Two controlled tr tube switching sequences in a pair of of first switch group differ 180 °, the first controllable switch Q1, third controllable switch
The switching sequence of Q3 and the 5th controllable switch Q5 differ 120 °.
Preferably, connected in three first switch groups the controlled tr tube of the first bus capacitor anode respectively with
The controlled tr tube that the second bus capacitor anode is connected in three second switch groups corresponds, three described first
The controlled tr tube of the first bus capacitor cathode is connected in switching group respectively with connecting institute in three second switch groups
The controlled tr tube for stating the second bus capacitor cathode corresponds；
The controller is additionally operable to connect the institute of the second bus capacitor anode in each second switch group of control
Controlled tr tube is stated with connecting the controlled tr tube of the first bus capacitor anode in the corresponding first switch group into same
Walk rectification state；And connected in each second switch group of control the controlled tr tube of the second bus capacitor cathode with
The controlled tr tube of the first bus capacitor cathode is connected in the corresponding first switch group into synchronous rectification state.
A kind of control method of crisscross parallel controlled resonant converter, includes the following steps：
The turn-on and turn-off of each controlled tr tube are controlled, with two controlled tr tubes switch in a pair of first switch group
The switching sequence of 180 ° of sequential difference, the first controllable switch Q1, third controllable switch Q3 and the 5th controllable switch Q5 differ 120 °；
Connected in three first switch groups the controlled tr tube of the first bus capacitor anode respectively with three institutes
State the controlled tr tube one-to-one correspondence that the second bus capacitor anode is connected in second switch group, three first switch groups
The controlled tr tube of middle connection the first bus capacitor cathode in three second switch groups respectively with connecting described second
The controlled tr tube of bus capacitor cathode corresponds；
Connected in each second switch group of control the controlled tr tube of the second bus capacitor anode with it is right
The controlled tr tube of the first bus capacitor anode is connected in the first switch group answered into synchronous rectification state；And control
The controlled tr tube that the second bus capacitor cathode is connected in each second switch group of system is opened with corresponding described first
The controlled tr tube of Guan Zuzhong connections the first bus capacitor cathode is into synchronous rectification state.
The present invention includes at least following advantageous effect：
1st, the present invention uses symmetrical LLC structure, autonomous to complete to flow, and reduces ripple current, improves variator
Performance；
2nd, in LLC list is reduced using two resonant capacitances being arranged in series, the resonant capacitance shunting function of two series connection
The pressure resistance of a resonant capacitance, and then reduce the volume of resonant capacitance；
3rd, it is integrated with reference to magnetic, the total volume of magnetic element with raising efficiency, can be reduced, be especially reduction of the second busbar electricity
The volume of appearance.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the circuit theory schematic diagram of converter of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to enable those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other element or combinations.
As shown in Fig. 1 a kind of way of realization of crisscross parallel controlled resonant converter according to the present invention, including：The
One translation circuit, the second translation circuit, connection the first translation circuit and the second translation circuit three transformers and be connected to
Resonance circuit between first translation circuit and transformer.
Wherein, the first translation circuit includes the first dc bus and be arranged in parallel between first dc bus three
To first switch group, the first switch group is made of the controlled tr tube of two series connection, specifically, first pair of first switch group
It is made of the first controllable switch Q1 and the second controllable switch Q2 that connect, second pair of first switch group is controllably opened by the third connected
Q3 and the 4th controllable switch Q4 compositions are closed, third is to first switch group by the 5th controllable switch Q5 and the 6th controllable switch Q6 groups
Into each pair of first switch group is sequentially connected in series between the first dc bus.
One first bus capacitor C1 is connected between first dc bus simultaneously, the first bus capacitor C1 is arranged on
The interface of first translation circuit.
Second translation circuit includes the second dc bus and three couple being arranged in parallel between second dc bus the
Two switching groups, the second switch group is made of the controlled tr tube of two series connection, specifically, first pair of second switch group is by going here and there
The 7th controllable switch Q7 and the 8th controllable switch the Q8 composition of connection, second pair of second switch group is by the 9th controllable switch Q9 that connects
It is formed with the tenth controllable switch Q10, third is to second switch group by the 11st controllable switch Q11 and the 12nd controllable switch Q12
Composition, each pair of second switch group are sequentially connected in series between the second dc bus.
One second bus capacitor C2 is connected between second dc bus simultaneously, the second bus capacitor C2 is arranged on
The interface of second translation circuit.
Three transformers Tr1, Tr2 and Tr3, three transformers connect first translation circuit and the second translation circuit,
Each transformer is connected between a first switch group and a second switch group, plays the role of voltage transformation.
Three resonance circuits are arranged on first translation circuit, and a resonance circuit is correspondingly connected with described in one
Transformer and a first switch group.Each resonance circuit includes an inductance and a pair of series capacitance, a pair of string
Join capacitance connection between first dc bus, the inductance first end is connected to two series connection of a first switch group
Controlled tr tube between, the inductance second end connects a transformer primary side winding first end, the transformer primary side
Winding second end is connected between a pair of series capacitance, which is connected to second switch group
Between the controlled tr tube of two series connection, the vice-side winding second end of each transformer connects altogether.
Specifically, first pair of series capacitance is made of the first capacitance Cr11 to connect and the second capacitance Cr12；Second pair of string
Connection capacitance is made of the third capacitance Cr21 to connect and the 4th capacitance Cr22；Third is to series capacitance by the 5th capacitance connected
Cr31 and the 6th capacitance Cr32 compositions.
First resonance circuit includes first inductance Lr1 and the first capacitance Cr11 and the second capacitance Cr12 of series connection；Second
Resonance circuit includes second inductance Lr2 and the third capacitance Cr21 and the 4th capacitance Cr22 of series connection；Third resonance circuit includes
Third inductance Lr3 and the 5th capacitance Cr31 and the 6th capacitance Cr32 of series connection.
First inductance Lr1 first end is connected between the first controllable switch Q1 and the second controllable switch Q2, first electricity
Sense Lr1 second ends are connected to first transformer Tr1 primary side winding first end, first transformer Tr1 primary side winding second end
It is connected between the first capacitance Cr11 and the second capacitance Cr12；
Second inductance Lr2 first end is connected between third controllable switch Q3 and the 4th controllable switch Q4, second electricity
Sense Lr2 second ends are connected to second transformer Tr2 primary side winding first end, second transformer Tr2 primary side winding second end
It is connected between third capacitance Cr21 and the 4th capacitance Cr22；
Third inductance Lr3 first ends are connected between the 5th controllable switch Q5 and the 6th controllable switch Q6, third electricity
Sense Lr3 second ends are connected to third transformer Tr3 primary side winding first ends, third transformer Tr3 primary side winding second ends
It is connected between the 5th capacitance Cr31 and the 6th capacitance Cr32.
First transformer Tr1 vice-side winding first end be connected to the 7th controllable switch Q7 and the 8th controllable switch Q8 it
Between, second transformer Tr2 vice-side winding first end is connected between the 9th controllable switch Q9 and the tenth controllable switch Q10, the
Three transformer Tr3 vice-side winding first ends are connected between the 11st controllable switch Q11 and the 12nd controllable switch Q12, the
One transformer Tr1, second transformer Tr2 and third transformer Tr3 vice-side winding second ends connect altogether.
Primary side winding first end and vice-side winding first end are Same Name of Ends.
In above-mentioned technical proposal, the controlled tr tube be semiconductor switch, including MOS memory,
Two-way controllable metal oxide semiconductor field effect transistor, igbt, turn-off thyristor, diode.
In a controlled tr tube both ends backward dioded in parallel so that variator has the function of to two-way circulate.
Further include a controller, the controller is used to control the turn-on and turn-off of each controlled tr tube, with a pair of the
Two controlled tr tube switching sequences in one switching group differ 180 °, the first controllable switch Q1, third controllable switch Q3 and the
The switching sequence of five controllable switch Q5 differs 120 °.
The controlled tr tube of the first bus capacitor C1 anodes U1 is connected in three first switch groups respectively with three
The controlled tr tube that the second bus capacitor anode U2 is connected in a second switch group corresponds, three described first
The controlled tr tube of the first bus capacitor C1 cathode U1 is connected in switching group respectively with connecting in three second switch groups
The controlled tr tube for meeting the second bus capacitor cathode U1 corresponds
The controller is additionally operable to connect the institute of the second bus capacitor anode in each second switch group of control
State controlled tr tube with connected in the corresponding first switch group controlled tr tubes of the first bus capacitor C1 anodes into
Synchronous rectification state；And the controlled tr tube of the second bus capacitor cathode is connected in each second switch group of control
With connecting the controlled tr tubes of the first bus capacitor C1 cathode in the corresponding first switch group into synchronous rectification state.
In voltage of the converter by the voltage step-down at the first bus capacitor C1 both ends to the second bus capacitor C2 both ends, the
One switching group is in main switch state, and poor 120 ° successively of the switching sequence phase of three first switch groups, each first switch group
In, phase difference is 180 ° between two semiconductor switch, and the duty ratio of each semiconductor switch is less than 50%；In controlled resonant converter
During by the voltage of the boost in voltage at the second bus capacitor C2 both ends to the first bus capacitor C1 both ends, first switch group, which is in, to be synchronized
Rectification state.Wherein, first switch group is in main switch state, i.e., two semiconductor switch in first switch group are in leading
On off state.First switch group is in synchronous rectification state, i.e., two semiconductor switch in first switch group are in rectification
State.
In controlled resonant converter by the boost in voltage at the second bus capacitor C2 both ends to the voltage at the first bus capacitor C1 both ends
When, second switch pipe is in main switch state, and poor 120 ° successively of the switching sequence phase of three second switch pipes, and each second opens
Guan Guanzhong, phase difference is the duty ratio of 180 ° of each semiconductor switch less than 50% between two semiconductor switch；Become in resonance
When parallel operation is by the voltage of the voltage step-down at the first bus capacitor C1 both ends to the second bus capacitor C2 both ends, second switch pipe is in
Synchronous rectification state.Wherein, second switch pipe is in main switch state, i.e., two semiconductor switch in second switch pipe are located
In main switch state.Second switch pipe is in synchronous rectification state, i.e., two semiconductor switch pipes in second switch pipe are located
In rectification state.
The present embodiment overcomes big intrinsic of controlled resonant converter ripple current by using three-phase crisscross parallel harmonic technology
Shortcoming, on each resonance circuit setting there are two the resonant capacitance connected, resonant inductance be connected to two series resonant capacitances it
Between, stream use is played, meanwhile, using two series resonant capacitance structures, the voltage on each resonant capacitance is reduced, from
And resonant capacitance volume is reduced, it is integrated with reference to magnetic, the total volume of magnetic element with raising efficiency, can be reduced, particularly effectively
Capacitance (i.e. the second bus capacitor C2) ripple current of low-pressure side is reduced, and then reduces the volume of the second bus capacitor C2,
The power density of power supply is improved, reduces the cost of the second bus capacitor C2.
The symmetrical LLC structure of three resonance circuits, improves resonance symmetry, autonomous to complete to flow, and improves two
The symmetry of electric current flowing between translation circuit further reduces ripple current, reduces the second bus capacitor volume, subtracts simultaneously
Small resonant capacitance own vol and resonant capacity.
Respectively according to the relational design of variator both end voltage into certain turn ratio, resonance becomes by transformer Tr1, Tr2, Tr3
U1 is transformed to U2 as decompression transformation by parallel operation, at this point, the corresponding three pairs of first switches of controllable switch Q1, Q3, Q5 are in main switch
State, the corresponding three pairs of second switch groups of controllable switch Q7, Q9, Q11 are in synchronous rectification state.Controlled resonant converter converts U2
It is boosting inverter to U1, the corresponding three pairs of second switch groups of controllable switch Q7, Q9, Q11 are in main switch state at this time, controllably open
It closes the corresponding three pairs of first switch groups of Q1, Q3, Q5 and is in synchronous rectification state.
When U1 is depressured to U2, the switching sequence phase of the corresponding three pairs of first switch groups of controllable switch Q1, Q3, Q5 is successively
Poor 120 °, the phase of the upper and lower controllable switch of first switch group differs 180 °, and duty ratio is slightly less than 50%, defines the humorous of resonance circuit
Vibration frequency is f, and switching frequency changes between resonant frequency f and 3f, and controllable switch Q7, Q9, Q11 are synchronous rectification bridge arm, the
The switching sequence and Q1, Q3, Q5 of two switching groups correspond to respectively, poor 120 ° successively of phase, as a result of interleaving technique, lead to
It will be 6 times of switching frequency to cross the ripple current frequencies of capacitance C1 and C2 so that wave filter is easier to filter out ripple current, so as to
The volume of wave filter (being the second bus capacitor C2 here) used can with smaller, meanwhile, three after staggered 120 °, and engagement uses
Symmetrical structure, electric current can be overlapped mutually and become flat so that ripple current value is substantially reduced, therefore uses smaller filter
Wave capacitance C1, C2 can meet high-power output requirement.
By U2 boost to U1 boosting inverter can regard as U1 to U2 transformation inverse transformation, controllable switch Q7, Q9, Q11 correspond to
Second switch composition be switch bridge arm, i.e. second switch group is in main switch state, switch bridge arm controllable switch Q7, Q9,
Q11 work schedules differ 120 ° successively, and controllable switch Q1, Q3, Q5 are that corresponding first switch composition is synchronous rectification bridge arm, i.e.,
First switch group is in synchronous rectification state.Since U1 is high pressure, the electric current that first switch group flows through is smaller.
From the above mentioned, the present invention uses symmetrical LLC structure, autonomous to complete to flow, and reduces ripple current, can make resonance
The conversion performance of converter is more preferable.Meanwhile using two resonant capacitances being arranged in series, the resonant capacitance of two series connection in LLC
Shunting function, reduces the pressure resistance of single resonant capacitance, and then reduces the volume of resonant capacitance；Further, with reference to magnetic collection
Into the total volume of magnetic element with raising efficiency, can be reduced, be especially reduction of the volume of the second bus capacitor C2.
Although the embodiments of the present invention have been disclosed as above, but its be not restricted in specification and embodiment it is listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, it is of the invention and unlimited
In specific details and legend shown and described herein.
Claims (8)
1. a kind of crisscross parallel controlled resonant converter, which is characterized in that including：
First translation circuit, including the first dc bus and three couple first being arranged in parallel between first dc bus
Switching group, the first switch group are made of the controlled tr tube of two series connection, and one is connected between first dc bus
First bus capacitor；
Second translation circuit, including the second dc bus and three couple second being arranged in parallel between second dc bus
Switching group, the second switch group are made of the controlled tr tube of two series connection, and one is connected between second dc bus
Second bus capacitor；
Three transformers connect first translation circuit and the second translation circuit；And
Three resonance circuits are arranged on first translation circuit, and a resonance circuit is correspondingly connected with a transformation
Device and a first switch group；
Wherein, the resonance circuit includes an inductance and a pair of series capacitance, and a pair of series capacitance connection is straight described first
Between flowing busbar, the inductance first end is connected between the controlled tr tube of two series connection of a first switch group, described
Inductance second end connects a transformer primary side winding first end, which is connected to a pair of of string
Between joining capacitance, the transformer secondary winding first end be connected to two of second switch group series connection controlled tr tubes it
Between, the vice-side winding second end of each transformer connects altogether.
2. crisscross parallel controlled resonant converter as described in claim 1, which is characterized in that the controlled tr tube is opened for semiconductor
It closes.
3. crisscross parallel controlled resonant converter as claimed in claim 2, which is characterized in that controlled tr tube both ends parallel connection one
Backward dioded.
4. crisscross parallel controlled resonant converter as described in claim 1, which is characterized in that first pair of first switch group is by connecting
First controllable switch Q1 and the second controllable switch Q2 compositions, second pair of first switch group is by the third controllable switch Q3 that connects and the
Four controllable switch Q4 are formed, and third is made of first switch group the 5th controllable switch Q5 and the 6th controllable switch Q6；
First pair of series capacitance is made of the first capacitance Cr11 to connect and the second capacitance Cr12；Second pair of series capacitance is by connecting
Third capacitance Cr21 and the 4th capacitance Cr22 composition；Third is to series capacitance by the 5th capacitance Cr31 to connect and the 6th capacitance
Cr32 is formed；
Wherein, first inductance Lr1 first end is connected between the first controllable switch Q1 and the second controllable switch Q2, first electricity
Sense Lr1 second ends are connected to first transformer Tr1 primary side winding first end, first transformer Tr1 primary side winding second end
It is connected between the first capacitance Cr11 and the second capacitance Cr12；
Second inductance Lr2 first end is connected between third controllable switch Q3 and the 4th controllable switch Q4, second inductance Lr2
Second end is connected to second transformer Tr2 primary side winding first end, and second transformer Tr2 primary side winding second end is connected to
Between third capacitance Cr21 and the 4th capacitance Cr22；
Third inductance Lr3 first ends are connected between the 5th controllable switch Q5 and the 6th controllable switch Q6, third inductance Lr3
Second end is connected to third transformer Tr3 primary side winding first ends, and third transformer Tr3 primary side winding second ends are connected to
Between 5th capacitance Cr31 and the 6th capacitance Cr32.
5. crisscross parallel controlled resonant converter as claimed in claim 4, which is characterized in that first pair of second switch group is by connecting
7th controllable switch Q7 and the 8th controllable switch Q8 compositions, second pair of second switch group is by the 9th controllable switch Q9 that connects and the
Ten controllable switch Q10 are formed, and third is made of second switch group the 11st controllable switch Q11 and the 12nd controllable switch Q12；
Wherein, first transformer Tr1 vice-side winding first end be connected to the 7th controllable switch Q7 and the 8th controllable switch Q8 it
Between, second transformer Tr2 vice-side winding first end is connected between the 9th controllable switch Q9 and the tenth controllable switch Q10, the
Three transformer Tr3 vice-side winding first ends are connected between the 11st controllable switch Q11 and the 12nd controllable switch Q12, the
One transformer Tr1, second transformer Tr2 and third transformer Tr3 vice-side winding second ends connect altogether.
6. crisscross parallel controlled resonant converter as claimed in claim 5, which is characterized in that further include a controller, the control
Device is used to control the turn-on and turn-off of each controlled tr tube, when being switched with two controlled tr tubes in a pair of first switch group
The switching sequence of 180 ° of sequence difference, the first controllable switch Q1, third controllable switch Q3 and the 5th controllable switch Q5 differ 120 °.
7. crisscross parallel controlled resonant converter as claimed in claim 6, which is characterized in that connected in three first switch groups
The controlled tr tube of the first bus capacitor anode is respectively with connecting the second busbar electricity in three second switch groups
The controlled tr tube for holding anode corresponds, and the controllable of the first bus capacitor cathode is connected in three first switch groups
Switching tube corresponds respectively with connecting the controlled tr tube of the second bus capacitor cathode in three second switch groups；
The controller is additionally operable to connect the described of the second bus capacitor anode in each second switch group of control can
Control switching tube is with connecting the controlled tr tube of the first bus capacitor anode into synchronous whole in the corresponding first switch group
Stream mode；And connected in each second switch group of control the controlled tr tube of the second bus capacitor cathode with it is corresponding
The first switch group in connect the controlled tr tube of the first bus capacitor cathode into synchronous rectification state.
8. the control method of crisscross parallel controlled resonant converter as claimed in claim 5, which is characterized in that include the following steps：
The turn-on and turn-off of each controlled tr tube are controlled, with two controlled tr tube switching sequences in a pair of first switch group
The switching sequence of 180 ° of difference, the first controllable switch Q1, third controllable switch Q3 and the 5th controllable switch Q5 differ 120 °；
Connected in three first switch groups the controlled tr tube of the first bus capacitor anode respectively with three described
The controlled tr tube that the second bus capacitor anode is connected in two switching groups corresponds, and connects in three first switch groups
The controlled tr tube of the first bus capacitor cathode is connect respectively with connecting second busbar in three second switch groups
The controlled tr tube of capacitance cathode corresponds；
Connected in each second switch group of control the controlled tr tube of the second bus capacitor anode with it is corresponding
The controlled tr tube of the first bus capacitor anode is connected in the first switch group into synchronous rectification state；And control is every
The controlled tr tube of the second bus capacitor cathode and the corresponding first switch group are connected in a second switch group
The controlled tr tube of middle connection the first bus capacitor cathode is into synchronous rectification state.
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| CN201810020273.0A CN108173433A (en) | 2018-01-09 | 2018-01-09 | A kind of crisscross parallel controlled resonant converter and control method |
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| CN201810020273.0A CN108173433A (en) | 2018-01-09 | 2018-01-09 | A kind of crisscross parallel controlled resonant converter and control method |
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| CN113346738A (en) * | 2021-05-19 | 2021-09-03 | 南京矽力微电子技术有限公司 | Switch capacitor converter |
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Application publication date: 20180615 |