CN110190752A - A kind of two-way CLLLC-DCX controlled resonant converter and its control method - Google Patents
A kind of two-way CLLLC-DCX controlled resonant converter and its control method Download PDFInfo
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- CN110190752A CN110190752A CN201910414918.3A CN201910414918A CN110190752A CN 110190752 A CN110190752 A CN 110190752A CN 201910414918 A CN201910414918 A CN 201910414918A CN 110190752 A CN110190752 A CN 110190752A
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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
- H02M3/33584—Bidirectional converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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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 two-way CLLLC-DCX controlled resonant converter and its control method, converter of the invention includes two ports, two resonance circuits, two switching circuitries and a transformer.Two-way CLLLC-DCX controlled resonant converter disclosed by the invention, circuit structure is symmetrical, forward and reverse working performance is consistent, under control method of the invention, ZVS the or ZCS Sofe Switch of input side and output side switch pipe can be well realized, the constant voltage gain under normal load may be implemented, and due to the presence of booster diode, converter has the function of two-way automatic limiting power, while realizing the natural two-way flow of energy under forward and reverse operational mode, improves the efficiency and reliability of converter.
Description
Technical field
The invention belongs to switch power technology field, more particularly, to a kind of two-way CLLLC-DCX controlled resonant converter and
Its control method.
Background technique
In recent years, DC-DC converter is widely used in every field, especially in the high voltage direct current comprising energy-storage units
The various power supply system occasions such as transmission of electricity, micro-capacitance sensor and electric car.Energy conversion is wanted in power electronics field
The continuous improvement asked, converter is gradually to high frequency, high efficiency, high power density development, and the energy-storage units of above system
It is needed when carrying out charge and discharge to energy hole, this requires power inverters to have the characteristics that two-way controlled power stream, therefore
Two-way, high-frequency isolation demand is also continuously increased.
In isolation type DC-DC converter, LLC resonant converter can realize the spy of the Sofe Switch under full-load range because of it
Property, there is very high power density and conversion efficiency.However, will form very high ring when switching frequency is far from resonance frequency
Road electric current and so that efficiency is lower.In order to solve Width funtion gain problem, it will usually use two-level configuration, wherein level-one is that work exists
The LLC resonant converter of resonance point is then called LLC-DCX, in addition level-one is non-isolated due to not changing its voltage gain
Type DC-DC converter, for adjusting voltage gain.Traditional LLC resonant converter is only in switched resonance and resonance frequency phase
Just there is permanent gain characteristic whens equal, and prevent the switching tube of same bridge arm from simultaneously turning on due to needing to add dead time,
Switching frequency can not be equal to resonance frequency；In addition, generally for the efficiency for improving LLC resonant converter, secondary-side switch pipe
The control strategy of synchronous rectification would generally be used, but under way traffic mode, it is forward and reverse due to the asymmetry of resonant cavity
Working performance be it is different, when inverted running, can lose the Sofe Switch characteristic of LLC, and detect current zero-crossing point, and control is patrolled
It collects and needs to switch between positive and reversed, while also needing to judge the flow direction of energy, be very tired in practical applications
Difficult.
Summary of the invention
In order to solve the problems, such as that asymmetric and control logic needs switching and permanent gain, the invention discloses a kind of two-way
CLLLC-DCX controlled resonant converter and equal pulse width control methods, the topology of the converter are synchronized for what is controlled converter
Symmetrical configuration, technical problems to be solved are that the ZVS or ZCS of input side and outlet side metal-oxide-semiconductor can be well realized soft to open
It closes, and realizes the function of the constant voltage gain under normal load and the two-way limit power of converter, while realizing forward and reverse operation
The natural two-way flow of energy, improves the efficiency and reliability of converter under mode.
The invention discloses a kind of two-way CLLLC-DCX controlled resonant converter, including main circuit and control circuit, the main electricity
Road include first port, second port, two resonance circuits, two switching circuitries and a transformer, the first port and
One of second port is optionally implemented as power end, another is then accordingly used as load end；Connect transformer both ends
Circuit topological structure is identical, and the primary side of transformer includes by resonant inductance Lr_p, resonant capacitance Cr_p1And Cr_p2And its inverse parallel is auxiliary
Help diode D1And D2The resonance circuit of composition, by switching tube Q1、Q2The switching circuit of composition；The secondary side of transformer similarly, including
By resonant inductance Lr_sWith resonant capacitance Cr_s1And Cr_s2And its inverse parallel booster diode D3And D4The resonance circuit of composition, by opening
Close pipe Q3And Q4The switching circuit of composition；
The connection relationship of all parts in the main circuit are as follows: in transformer primary side, resonant capacitance Cr_p1Anode and open
Close pipe Q1Drain electrode simultaneously be connected with first port anode, resonant capacitance Cr_p1Cathode then simultaneously with resonant capacitance Cr_p2Anode
It is connected with the cathode of transformer primary side, switching tube Q1Source electrode simultaneously with resonant inductance Lr_pOne end and switching tube Q2Drain electrode
It is connected, switching tube Q2Source electrode and resonant capacitance Cr_p2Cathode be connected simultaneously with the cathode of first port, and resonant inductance Lr_p
The other end be then connected with the anode of transformer primary side, booster diode D1、D2Inverse parallel is in resonant capacitance C respectivelyr_p1、
Cr_p2；Likewise, in transformer secondary, anode and the resonant inductance L of Circuit Fault on Secondary Transformerr_sOne end be connected, resonant inductance
Lr_sThe other end simultaneously with switching tube Q3Source electrode and switching tube Q4Drain electrode be connected, switching tube Q3Drain electrode simultaneously with resonance electricity
Hold Cr_s1It is connected with the anode of second port, resonant capacitance Cr_s1Cathode simultaneously with resonant capacitance Cr_s2Anode and transformer
The cathode of secondary side is connected, and switching tube Q4Source electrode, resonant capacitance Cr_s2Cathode and the cathode of second port be connected in one simultaneously
It rises, booster diode D3、D4Inverse parallel is in resonant capacitance C respectivelyr_s1、Cr_s2。
In another embodiment, control circuit includes controller and driving circuit；Controller is dsp controller, is used
In generating one group of complementary PWM drive signal, the PWM drive signal from controller that driving circuit will receive, by every
Driving voltage is provided from switching tube Q1~Q4 after enhancing with voltage for main circuit.
In another embodiment, the switching tube Q1~Q4 is posting there are antiparallel body diode and hourglass source electrode
The switching tube of raw capacitor.
In addition, the invention also discloses the control method of the two-way CLLLC-DCX controlled resonant converter, the controlling party
Method includes:
In forward direction operation, when flowing through resonant inductance Lr_pElectric current ir1When being zero, while opening switching tube Q1And Q3, warp
After crossing half of harmonic period, ir1It is again zero, at this time by switching tube Q1And Q3It simultaneously closes off, by a dead time, ir1?
It is vibrated a little near zero in dead time, Q2And Q4When simultaneously turning on, ir1It also is zero, after half of harmonic period, Q2With
Q4In ir1It is simultaneously closed off when being again zero；
In inverted running, when flowing through resonant inductance Lr_sElectric current ir2When being zero, while opening switching tube Q1And Q3, warp
After crossing half of harmonic period, ir2It is again zero, at this time by switching tube Q1And Q3It simultaneously closes off, by a dead time, ir2?
It is vibrated a little near zero in dead time, Q2And Q4When simultaneously turning on, ir2It also is zero, after half of harmonic period, Q2With
Q4In ir2It is simultaneously closed off when being again zero.
Compared with the existing technology, the present invention have it is following the utility model has the advantages that
1, working performance is the same when forward and reverse operation, control logic that no replacement is required, it can be achieved that energy natural two-way flow.
2, it can be achieved that the zero current of Q1, Q2, no-voltage are opened and zero-current switching when forward direction is run, the no-voltage of Q3, Q4
It is open-minded, when magnetizing inductance be designed comparison it is reasonable when, the cut-off current of Q3, Q4 are smaller；, it can be achieved that Q3, Q4 when inverted running
Zero current, no-voltage is opened and zero-current switching, the no-voltage of Q1, Q2 are open-minded, with should magnetizing inductance be designed to compare conjunction
When reason, the cut-off current of Q1, Q2 are also smaller.
3, in normal load range, the variation of load will not influence voltage gain, and voltage is steady state value；In the feelings of overload
Under condition, due to the presence of booster diode, output power does not exceed a maximum value, plays the role of output protection.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is of the invention one
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of two-way CLLLC-DCX controlled resonant converter electrical block diagram provided by the invention；
Fig. 2 (a) is main waveform diagram of the transformer of the present invention work under normal load condition；
Fig. 2 (b) is the main waveform diagram that transformer of the present invention works in the case of an overload；
T when Fig. 3 is the converter normal load work of the embodiment of the present invention0~t3Working condition equivalent circuit diagram；
T when Fig. 4 is the converter overload work of the embodiment of the present invention0~t4Working condition equivalent circuit diagram.
Specific embodiment
The present invention is clearly and completely described below in conjunction with drawings and examples, while also describing the present invention
The technical issues of technical solution solves and beneficial effect, it should be pointed out that described embodiment is intended merely to facilitate to this hair
Bright understanding, and do not play any restriction effect to it.
As shown in Figure 1, the main circuit of the two-way CLLLC-DCX controlled resonant converter mainly includes two ports (first
Port, second port), two resonance circuits, two switching circuitries and a transformer.The first port and second port it
One is optionally implemented as the power end of converter of the present invention, another is then accordingly used as load end；Transformer both ends
Structure is identical, and the primary side of transformer includes by resonant inductance Lr_pWith resonant capacitance (Cr_p1、Cr_p2) and its two poles of inverse parallel auxiliary
Manage (D1、D2) composition resonance circuit, by switching tube (Q1、Q2) composition switching circuit.The secondary side of transformer similarly, including by
Resonant inductance Lr_sWith resonant capacitance (Cr_s1、Cr_s2) and its inverse parallel booster diode (D3、D4) composition resonance circuit, by opening
Close pipe (Q3、Q4) composition switching circuit.Connection relationship is: the primary side of transformer, resonant capacitance Cr_p1Anode and switching tube Q1
Drain electrode simultaneously be connected with first port anode, resonant capacitance Cr_p1Cathode then simultaneously with resonant capacitance Cr_p2Anode and transformation
The cathode of device primary side is connected, switching tube Q1Source electrode simultaneously with resonant inductance Lr_pOne end and switching tube Q2Drain electrode be connected,
Switching tube Q2Source electrode and resonant capacitance Cr_p2Cathode be connected simultaneously with the cathode of first port, and resonant inductance Lr_pIt is another
End is then connected with the anode of transformer primary side, booster diode D1、D2Inverse parallel is in resonant capacitance C respectivelyr_p1、Cr_p2；Equally
, in transformer secondary, anode and the resonant inductance L of Circuit Fault on Secondary Transformerr_sOne end be connected, resonant inductance Lr_sThe other end
Simultaneously with switching tube Q3Source electrode and switching tube Q4Drain electrode be connected, switching tube Q3Drain electrode simultaneously with resonant capacitance Cr_s1With
The anode of Two-port netwerk is connected, resonant capacitance Cr_s1Cathode simultaneously with resonant capacitance Cr_s2Anode and Circuit Fault on Secondary Transformer it is negative
Extremely it is connected, and switching tube Q4Source electrode, resonant capacitance Cr_s2Cathode and the cathode of second port connect together simultaneously, auxiliary two
Pole pipe D3、D4Inverse parallel is in resonant capacitance C respectivelyr_s1、Cr_s2。
Preferably, switching tube (the Q1、Q2、Q3、Q4) it is that there are the parasitism of antiparallel body diode and hourglass source electrode is electric
The switching tube of appearance.
As shown in Figure 1, the voltage of converter first port is V1, i1For its electric current, and the voltage of second port is V2, i2
For its electric current；ir1、ir2Respectively resonant inductance L is flowed through on transformer primary pair sider_p、Lr_sResonance current；imIt is to flow through excitation electricity
Feel LmElectric current；ucp1、ucp2、ucs1、ucs2It is the voltage at former secondary side resonant capacitance both ends respectively；iD1、iD2、iD3、iD4It is stream respectively
Cross the electric current of former secondary side booster diode；Q1、Q2、Q3、Q4Respectively represent the gate signal of corresponding metal-oxide-semiconductor.
Specific control method is as follows:
When forward direction operation, when flowing through resonant inductance Lr_pElectric current ir1When being zero, while opening switching tube Q1And Q3, pass through
After half of harmonic period, ir1It is again zero, at this time by switching tube Q1And Q3It simultaneously closes off.By a dead time, ir1Dead
It is vibrated a little near zero in area's time, Q2And Q4When simultaneously turning on, ir1It also is zero, after half of harmonic period, Q2And Q4
In ir1It is simultaneously closed off when being again zero.It when inverted running similarly, is according to resonant inductance L at this timer_sElectric current ir2Zero crossing
For details, reference can be made to Fig. 3-4 for operation mode when situation opens the node of shutdown, normal load and overlond running as switching tube
It is shown.
Other than main circuit, two-way CLLLC-DCX controlled resonant converter further includes control circuit, and control circuit includes controller
And driving circuit；Controller is dsp controller, and for generating one group of complementary PWM drive signal, driving circuit will be received
PWM drive signal from controller is the switching tube Q of main circuit after being isolated and voltage enhances1~Q4Driving electricity is provided
Pressure.Control circuit can be used to realize in above-mentioned switch controlled method.
The present embodiment and its circuit topology course of work are as follows:
By taking forward direction work as an example, as shown in Fig. 2 (a) and Fig. 3, when converter work is in normal load, in t0It is moment, humorous
Shake electric current ir1Start from zero increase when, switching tube Q1And Q3Open-minded, Q simultaneously1For zero current turning-on, if parameter and dead time
Design is reasonable, t0Moment Q1Just discharge off can then realize Q simultaneously1No-voltage it is open-minded, it is special according to the voltage-second balance of inductance
Property, exciting current i before opening between dead zonemFor negative value, secondary current is from Q3Body diode flow through, Q3The voltage at both ends
Clamper is zero, is Q3No-voltage open and create condition；Make switching frequency equal with resonance frequency by adjusting dead time,
ir1For sinusoidal signal, when reaching zero again by half of harmonic period, switching tube Q1And Q3It simultaneously turns off, at this time Q1For zero current
Shutdown, secondary current nim, n is the no-load voltage ratio of transformer, then Q3There is cut-off current, if LmValue increases, and cut-off current is then
It can correspondingly reduce；t1To t3It is dead time, primary side Q at this time1Junction capacity charging, Q2Junction capacity electric discharge, secondary side Q3Knot
Capacitor charging, Q4Junction capacity electric discharge, due to ir2Value be greater than ir1, the junction capacity on secondary side is in t2When elder generation charge and discharge finish, t2To t3
Electric current is from Q4Body diode flow through Q4The voltage clamping at both ends is zero.Under normal load condition, if selection parameter selects
Rationally, input current and output electric current be in proportionate relationship, according to input-output power conservation principle, input and output voltage be also in than
Example relationship, unrelated with load, then in normal load range, voltage gain is invariable.Later half period waveform symmetry, principle
Also identical.
As shown in Fig. 2 (b) and Fig. 4, when transformer works in the case of an overload, similarly in resonance current ir1When being zero
It is switched on or off corresponding metal-oxide-semiconductor；When load down, theoretically output power be will increase, and input current becomes larger, identical
In time, the voltage peak-to-peak value of resonant capacitance can also become larger, but due to booster diode D1、D2Presence, resonant capacitance both ends
Voltage does not exceed input voltage, t1Moment, resonant capacitance Cr_p2It is charged to as supply voltage, in addition corresponding resonance electricity
Hold Cr_p1Zero is discharged into, electric current transfers to flow to D at this time1Cr_p1Clamper is zero, and power supply and transformer are detached from, and it is defeated that there is no power
Enter, to play the role of two-way limit power.t2To t4It is dead time, similar when to normal load, the knot of former secondary-side switch pipe
Capacitor charge and discharge, and similarly first make secondary side junction capacity in t since secondary current is larger3Moment charge and discharge are complete, and electric current walks two pole of body
Pipe, Q4Clamper is zero.
To sum up, the two-way forward and reverse working performance of CLLLC-DCX controlled resonant converter disclosed by the invention is consistent, due to being added to
Auxiliary induction (Lp、Ls), it can be achieved that whole power switch tube (S1、S2、S3、S4) no-voltage in full-load range opens (ZVS),
And circulation loss is reduced, efficiency of transmission is improved.When forward and reverse operation, the working performance of converter of the present invention is the same, when
When energy flow direction changes, control logic that no replacement is required can be realized the natural two-way flow of energy.In nominal load
Into unloaded range, voltage gain is unrelated with the variation of load, and voltage is a steady state value；In the event of overloading, two are assisted
Pole pipe (D1、D2、D3、D4) clamping action so that output power is not exceeded a maximum value, the work of protection can be played to output
With.
What is proposed through the invention the control method of pulsewidths such as synchronizes, can be humorous to the two-way CLLLC-DCX of proposition very well
ZVS, ZCS Sofe Switch of input side metal-oxide-semiconductor and the ZVS Sofe Switch of outlet side are realized on vibration converter, and are realized normal negative
Carry the function of lower constant voltage gain and the two-way limit power of converter, at the same realize energy under forward and reverse operational mode naturally pair
To flowing, the efficiency and reliability of converter is improved.
Finally, it is stated that: the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although ginseng
According to previous embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；And
These are modified or replaceed, the spirit and model of technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (4)
1. a kind of two-way CLLLC-DCX controlled resonant converter, which is characterized in that including main circuit and control circuit, the main circuit
Include first port, second port, two resonance circuits, two switching circuitries and a transformer, the first port and
One of Two-port netwerk is optionally implemented as power end, another is then accordingly used as load end；Connect the electricity at transformer both ends
Road topological structure is identical, and the primary side of transformer includes by resonant inductance Lr_p, resonant capacitance Cr_p1And Cr_p2And its inverse parallel auxiliary
Diode D1And D2The resonance circuit of composition, by switching tube Q1、Q2The switching circuit of composition；The secondary side of transformer similarly, including by
Resonant inductance Lr_sWith resonant capacitance Cr_s1And Cr_s2And its inverse parallel booster diode D3And D4The resonance circuit of composition, by switching
Pipe Q3And Q4The switching circuit of composition；
The connection relationship of all parts in the main circuit are as follows: in transformer primary side, resonant capacitance Cr_p1Anode and switching tube Q1
Drain electrode simultaneously be connected with first port anode, resonant capacitance Cr_p1Cathode then simultaneously with resonant capacitance Cr_p2Anode and transformation
The cathode of device primary side is connected, switching tube Q1Source electrode simultaneously with resonant inductance Lr_pOne end and switching tube Q2Drain electrode be connected,
Switching tube Q2Source electrode and resonant capacitance Cr_p2Cathode be connected simultaneously with the cathode of first port, and resonant inductance Lr_pIt is another
End is then connected with the anode of transformer primary side, booster diode D1、D2Inverse parallel is in resonant capacitance C respectivelyr_p1、Cr_p2；Equally
, in transformer secondary, anode and the resonant inductance L of Circuit Fault on Secondary Transformerr_sOne end be connected, resonant inductance Lr_sThe other end
Simultaneously with switching tube Q3Source electrode and switching tube Q4Drain electrode be connected, switching tube Q3Drain electrode simultaneously with resonant capacitance Cr_s1With
The anode of Two-port netwerk is connected, resonant capacitance Cr_s1Cathode simultaneously with resonant capacitance Cr_s2Anode and Circuit Fault on Secondary Transformer it is negative
Extremely it is connected, and switching tube Q4Source electrode, resonant capacitance Cr_s2Cathode and the cathode of second port connect together simultaneously, auxiliary two
Pole pipe D3、D4Inverse parallel is in resonant capacitance C respectivelyr_s1、Cr_s2。
2. two-way CLLLC-DCX controlled resonant converter according to claim 1, which is characterized in that control circuit includes control
Device and driving circuit；Controller is dsp controller, and for generating one group of complementary PWM drive signal, driving circuit will be received
The PWM drive signal from controller, through isolation and voltage enhancing after be main circuit switching tube Q1~Q4Driving electricity is provided
Pressure.
3. two-way CLLLC-DCX controlled resonant converter according to claim 1 or 2, which is characterized in that the switching tube Q1~
Q4For there are the switching tubes of antiparallel body diode and the parasitic capacitance of hourglass source electrode.
4. a kind of control method of two-way CLLLC-DCX controlled resonant converter as described in any one of claims 1-3, feature exist
In the control method includes:
In forward direction operation, when flowing through resonant inductance Lr_pElectric current ir1When being zero, while opening switching tube Q1And Q3, by half
After harmonic period, ir1It is again zero, at this time by switching tube Q1And Q3It simultaneously closes off, by a dead time, ir1At dead zone
It is interior to be vibrated a little near zero, Q2And Q4When simultaneously turning on, ir1It also is zero, after half of harmonic period, Q2And Q4In ir1
It is simultaneously closed off when being again zero.
In inverted running, when flowing through resonant inductance Lr_sElectric current ir2When being zero, while opening switching tube Q1And Q3, by half
After harmonic period, ir2It is again zero, at this time by switching tube Q1And Q3It simultaneously closes off, by a dead time, ir2At dead zone
It is interior to be vibrated a little near zero, Q2And Q4When simultaneously turning on, ir2It also is zero, after half of harmonic period, Q2And Q4In ir2
It is simultaneously closed off when being again zero.
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| CN110752756A (en) * | 2019-10-28 | 2020-02-04 | 北方工业大学 | High-gain conversion circuit and control method thereof |
| CN111509987A (en) * | 2020-02-29 | 2020-08-07 | 青岛能蜂电气有限公司 | Resonant converter, parameter optimization method and device thereof, and electronic equipment |
| CN114744888A (en) * | 2022-06-10 | 2022-07-12 | 深圳市国电赛思电源技术有限责任公司 | Bidirectional direct-current power supply and control method |
| CN116707318A (en) * | 2023-08-08 | 2023-09-05 | 深圳市泰昂能源科技股份有限公司 | Soft switching bidirectional converter topology and control method |
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| DE102021116288A1 (en) * | 2021-06-23 | 2022-12-29 | Compleo Charging Solutions Ag | Operating procedure for a supply station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110752756A (en) * | 2019-10-28 | 2020-02-04 | 北方工业大学 | High-gain conversion circuit and control method thereof |
| CN111509987A (en) * | 2020-02-29 | 2020-08-07 | 青岛能蜂电气有限公司 | Resonant converter, parameter optimization method and device thereof, and electronic equipment |
| CN114744888A (en) * | 2022-06-10 | 2022-07-12 | 深圳市国电赛思电源技术有限责任公司 | Bidirectional direct-current power supply and control method |
| CN116707318A (en) * | 2023-08-08 | 2023-09-05 | 深圳市泰昂能源科技股份有限公司 | Soft switching bidirectional converter topology and control method |
| CN116707318B (en) * | 2023-08-08 | 2024-01-26 | 深圳市泰昂能源科技股份有限公司 | Soft switching bidirectional converter topology and control method |
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