CN101707440A - LLC resonant converter control method, synchronous rectification control method and device - Google Patents
LLC resonant converter control method, synchronous rectification control method and device Download PDFInfo
- Publication number
- CN101707440A CN101707440A CN200910221471A CN200910221471A CN101707440A CN 101707440 A CN101707440 A CN 101707440A CN 200910221471 A CN200910221471 A CN 200910221471A CN 200910221471 A CN200910221471 A CN 200910221471A CN 101707440 A CN101707440 A CN 101707440A
- Authority
- CN
- China
- Prior art keywords
- frequency
- drive signal
- resonant circuit
- llc resonant
- tube drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an LLC resonant converter control method, synchronous rectification control method and device, wherein the LLC resonant converter control method comprises the steps of: judging whether a load works in a preset state or not according to the connection frequency of an input switching tube of an LLC resonant circuit; if the load works in the preset state, enabling the LLC resonant circuit to work in a width modulation mode, and otherwise, enabling the LLC resonant circuit to work in a frequency modulation mode, wherein the preset state comprises a light load state or no-load state. The invention realizes the voltage stabilization under the condition of light load or no-load of the LLC resonant circuit, lowers the circuit loss, effectively simplifies a peripheral hardware circuit, and is more reliable in use compared with the prior art.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of LLC controlled resonant converter control method, synchronous rectification control method, LLC controlled resonant converter controller and synchronous commutation control device.
Background technology
Along with the development of switch power technology, high efficiency and high power density become development trend.In this case, the application in the industry cycle of LLC resonant circuit more and more widely.Compare with other soft switch technique, the LLC resonant circuit has some remarkable advantages: the no-voltage that can realize the primary side switching tube in than wider frequency is open-minded, and has the characteristic of holding time of power down preferably; Owing to secondary side rectifying tube zero-current switching, therefore reduced the turn-off power loss of rectifying tube; The circuit work frequency height can reduce the volume of power supply.
Though LLC can realize the zero-current switching of secondary side rectifying tube, in the application scenario of big electric current, the conduction loss of rectifying tube is bigger.Therefore, proposed synchronous rectification in the correlation technique, and proposed the synchronous rectification scheme of several LLC resonant circuits, mainly comprised following several:
1. based on the band synchronous rectification LLC resonance oscillation semi-bridge converter scheme of secondary side controller control.Its implementation is: controller places secondary side, and the drive signal of control switch pipe and secondary side synchronous rectification switch pipe is synchronous, makes the conducting of primary side switching tube when opening earlier, makes the conducting of secondary side switches pipe through after the constant time lag; The secondary side switches pipe is turn-offed, again through turn-offing the primary side switching tube after the constant time lag.Diode current flow overlong time in the body of this scheme synchronous rectifier, loss ratio is bigger, for big electric current output, adopts this scheme limited to improved efficiency.
2. based on the band synchronous rectification LLC controlling schemes of current detection circuit.Its implementation is: the secondary side synchronous rectifying controller is by to the zero passage detection of power converting circuit output current, and the break-make of control circuit of synchronous rectification makes circuit of synchronous rectification in electric current conducting greater than zero time, and all the other times turn-off.The problem that this scheme exists is to need extra current over-zero testing circuit, has increased cost, and accuracy of detection requires very high, and disturbed easily, causes the synchronous rectifier misoperation.
3. based on the band synchronous rectification LLC resonance oscillation semi-bridge converter scheme of primary side controller control.Its implementation is: the synchronized signal that obtains secondary side synchronous rectification switch pipe by the drive signal of power switch pipe.During less than resonance frequency, the lock-in tube drive signal is the constant pulse width signal of pulsewidth less than the power switch pulsewidth at switching frequency; During greater than resonance frequency, lock-in tube drive signal and power switch drive signal are in full accord at switching frequency.This scheme can not guarantee reliability service under underloading, zero load, may cause that the short time output voltage is counter irritates, in addition when switching frequency greater than resonance frequency and be operated under the heavily loaded situation, may cause common aircraft bombing problem.
Big at the synchronous rectification scheme output voltage instability that exists in the correlation technique, loss, as to have common defective problem does not propose effective solution at present as yet.
Summary of the invention
Big at synchronous rectification scheme output voltage instability, loss, have the problem of common defective and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of LLC controlled resonant converter control method, synchronous rectification control method, LLC controlled resonant converter controller and synchronous commutation control device, one of to address the above problem at least.
To achieve these goals, according to an aspect of the present invention, a kind of LLC controlled resonant converter control method is provided, this method comprises: judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, if the LLC resonant circuit is operated in transfers wide control model, otherwise, make the LLC resonant circuit be operated in the frequency modulation control pattern, wherein, predetermined state comprises light condition or Light Condition.
Preferably, judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in before the predetermined state, and said method also comprises: obtain the feedback signal of load, calculate input switch pipe turn-on frequency according to feedback signal.
Preferably, feedback signal comprises one of following: output voltage, output current.
Preferably, calculating input switch pipe turn-on frequency according to feedback signal comprises: the absolute value of the difference of feedback signal and predetermined value is carried out multiply by certain proportion after the integral operation obtain input switch pipe turn-on frequency.
Preferably, judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state and comprises: whether the input switch pipe turn-on frequency of judging the LLC resonant circuit is greater than preset frequency, if, judge that then loaded work piece is at predetermined state, otherwise, judge that load is not operated in predetermined state.
To achieve these goals, according to another aspect of the present invention, a kind of synchronous rectification control method is provided, be applied to use the LLC resonant circuit of the method for claim 1, this method comprises: judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, if then close lock-in tube and drive; Otherwise, under the situation of input switch pipe turn-on frequency greater than the resonance frequency of LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in the power tube drive signal corresponding with the lock-in tube drive signal, closing of lock-in tube drive signal is synchronized with closing of power tube drive signal, wherein, predetermined state comprises light condition or Light Condition.
Preferably, said method also comprises: be less than or equal at input switch pipe turn-on frequency under the situation of resonance frequency of LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in the power tube drive signal, and the pulse duration of lock-in tube drive signal is half of harmonic period of LLC resonant circuit.
Preferably, the opening of power tube drive signal that postpones in corresponding with the lock-in tube drive signal of opening of lock-in tube drive signal comprises: behind delay scheduled time on the service time of power tube drive signal, open the lock-in tube drive signal, wherein the scheduled time comprises one of following: set time, the time that changes with the operating frequency of LLC resonant circuit.
To achieve these goals, according to a further aspect of the invention, a kind of LLC controlled resonant converter controller is provided, this controller comprises: judge module, be used for judging according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, wherein, predetermined state comprises: light condition or Light Condition; First adjusting module is used for being judged as under the situation that is at judge module, resonant circuit is operated in transfers wide control model; Second adjusting module is used for being judged as under the situation not at judge module, makes resonant circuit be operated in the frequency modulation control pattern.
Preferably, judge module comprises: obtain submodule, be used to obtain the feedback signal of load; Calculating sub module is used for according to obtaining the feedback signal calculating input switch pipe turn-on frequency that submodule obtains.
To achieve these goals, according to a further aspect of the invention, a kind of synchronous commutation control device is provided, this device comprises: judge module, be used for judging according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, wherein, predetermined state comprises: light condition or Light Condition; Drive closing module, be used for being judged as under the situation that is, close lock-in tube and drive at judge module; The first drive signal control module, be used for being judged as not at judge module, and under the situation of input switch pipe turn-on frequency greater than the resonance frequency of LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in the power tube drive signal corresponding with the lock-in tube drive signal, closing of lock-in tube drive signal is synchronized with closing of power tube drive signal.
Preferably, said apparatus also comprises: the second drive signal control module, be used for being judged as not at judge module, and input switch pipe turn-on frequency is less than or equal under the situation of resonance frequency of LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in the power tube drive signal, and the pulse duration of lock-in tube drive signal is half of harmonic period of LLC resonant circuit.
By the present invention, employing is regulated output voltage by the pattern that changes the work of LLC resonant circuit, and obtain the drive signal of synchronous rectification switch according to the resonance frequency of frequency, load state and the circuit of input power switch pipe, solved the problem that synchronous rectification scheme output voltage instability, loss are big, have common defective, under the situation of zero load of LLC resonant circuit or underloading, realized voltage stabilizing, reduced the loss of circuit, effectively simplified the peripheral hardware circuit, compared with the prior art scheme more and use reliably.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the LLC resonant circuit structure schematic diagram that does not comprise synchronous rectification according to correlation technique;
Fig. 2 is the flow chart according to the LLC controlled resonant converter control method of the embodiment of the invention;
Fig. 3 is the f 〉=f according to example 1
sThe time underloading signal timing diagram;
Fig. 4 is the f 〉=f according to example 1
sThe time override signal sequential chart;
Fig. 5 is the f according to example 1
m＜f＜f
sThe time underloading signal timing diagram;
Fig. 6 is the f according to example 1
m＜f＜f
sThe time override signal sequential chart;
Fig. 7 is the control device structural representation according to the LLC controlled resonant converter control method of example 2 and the application of synchronous rectification control method thereof;
Fig. 8 is the generation flow chart according to the primary side power switch control signal of example 2;
Fig. 9 is the algorithm flow chart according to the synchronous rectification control method of example 2;
Figure 10 is the structured flowchart according to the LLC controlled resonant converter controller of the embodiment of the invention;
Figure 11 is the structured flowchart according to the synchronous commutation control device of the embodiment of the invention.
Embodiment
Functional overview
Consider problems of the prior art, the embodiment of the invention provides a kind of LLC controlled resonant converter controlling schemes, the treatment principle of this scheme is: judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, if, then make described LLC resonant circuit be operated in the wide control model of accent, otherwise, make described LLC resonant circuit be operated in the frequency modulation control pattern, wherein, described predetermined state comprises light condition or Light Condition.This scheme has realized voltage stabilizing under the situation of zero load of LLC resonant circuit or underloading, reduced the loss of circuit, has effectively simplified the peripheral hardware circuit, compares with the prior art scheme more and uses reliably.
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Method embodiment
According to embodiments of the invention, a kind of LLC controlled resonant converter control method is provided, Fig. 2 is the flow chart according to the LLC controlled resonant converter control method of the embodiment of the invention, as shown in Figure 2, this method comprises that following step S202 is to step S204:
Step S202, obtain the feedback signal of load, calculate input switch pipe turn-on frequency according to feedback signal, wherein, it is one of following that feedback signal comprises: output voltage, output current. and calculate input switch pipe turn-on frequency according to feedback signal and comprise: the absolute value of the difference of feedback signal and predetermined value is carried out multiply by certain proportion after the integral operation obtain input switch pipe turn-on frequency, in actual applications, said process can for: with the detection digital value of output voltage or output current and set-point relatively, compared result is carried out ratio-integral operation and is obtained frequency signal.
Step S204, judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, if, the LLC resonant circuit is operated in transfers wide control model, otherwise, make the LLC resonant circuit be operated in the frequency modulation control pattern, wherein, predetermined state comprises light condition or Light Condition.Judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state and comprises: whether the input switch pipe turn-on frequency of judging the LLC resonant circuit is greater than preset frequency, if, judge that then loaded work piece is at predetermined state, otherwise, judge that load is not operated in predetermined state.
Preferably, whether be operated in underloading or Light Condition according to input switch pipe turn-on frequency decision circuitry among the step S204.If the input switch pipe turn-on frequency that obtains among the step S202 greater than peak frequency (promptly, preset frequency) then switches to the wide control model of accent, this moment, circuit was with fixing maximum frequency operation, thereby avoid under underloading or no-load condition circuit work frequency too high, otherwise be operated in the frequency modulation control pattern with fixed duty cycle, above-mentioned peak frequency is by the electrical characteristic decision of circuit.
Determining of preset frequency among the step S204 is relevant with the circuit parameter of LLC resonant circuit, particularly, this preset frequency is determined according to resonant inductance, magnetizing inductance and the resonant capacitance of LLC resonant circuit, in actual applications, the technical staff can be according to above parameter setting preset frequency, behind the switching tube turn-on frequency of LLC resonant circuit itself and preset frequency are compared obtaining, can judge current circuit working at underloading or Light Condition at the switching tube turn-on frequency under greater than the situation of preset frequency, and then circuit switched to transfer wide control model.
This method is to regulate output voltage by the turn-on frequency that changes resonant circuit input switch pipe, judge according to switching frequency whether load is operated in underloading or Light Condition, as be operated in underloading or no-load condition and converter entered by the frequency modulation pattern transfer wide control mode.
According to embodiments of the invention, a kind of synchronous rectification control method also is provided, be applied to use the LLC resonant circuit of above-mentioned LLC controlled resonant converter control method, this method comprises:
Judge according to the input switch pipe turn-on frequency of described LLC resonant circuit whether load is operated in predetermined state, if then close lock-in tube and drive; Otherwise, under the situation of described input switch pipe turn-on frequency greater than the resonance frequency of described LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in the power tube drive signal corresponding with described lock-in tube drive signal, closing of described lock-in tube drive signal is synchronized with closing of described power tube drive signal, wherein, described predetermined state comprises light condition or Light Condition; Be less than or equal at described input switch pipe turn-on frequency under the situation of resonance frequency of described LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in described power tube drive signal, and the pulse duration of described lock-in tube drive signal is half of harmonic period of described LLC resonant circuit, is a fixing pulse duration.Wherein, the opening of described power tube drive signal that postpones in corresponding with described lock-in tube drive signal of opening of described lock-in tube drive signal comprises: behind delay scheduled time on the service time of described power tube drive signal, open described lock-in tube drive signal, the wherein said scheduled time comprises one of following: set time, the time that changes with the operating frequency of described LLC resonant circuit.That is to say, open time of delay and can fix, also can change, make that the interior diode current flow time of synchronous rectification body is few as far as possible, thereby reduce the wastage, raise the efficiency effectively along with operating frequency.
Above-mentioned synchronous rectification control method is the drive signal that the resonance frequency (that is the resonance frequency of LLC resonant circuit) of frequency (that is input switch pipe turn-on frequency), load state and circuit according to the input power switch pipe is obtained synchronous rectification switch.
Be described in detail below in conjunction with the implementation procedure of example the embodiment of the invention.
Example 1
Fig. 3 to Fig. 6 is a LLC resonant circuit shown in Figure 1 waveform at different frequency section and different loads side power tube driving next time, secondary side rectified current, resonance current and exciting current.
Particularly, Fig. 3 is the f 〉=f according to example 1
sThe time underloading signal timing diagram, waveform from top to bottom is respectively among the figure: primary resonant electric current and exciting current, secondary commutation electric current, main switch drive; Fig. 4 is the f 〉=f according to example 1
sThe time override signal sequential chart, waveform from top to bottom is respectively among the figure: primary resonant electric current and exciting current, secondary commutation electric current, main switch drive; Fig. 5 is the f according to example 1
m＜f＜f
sThe time underloading signal timing diagram, waveform from top to bottom is respectively among the figure: primary resonant electric current and exciting current, secondary commutation electric current, main switch drive; Fig. 6 is the f according to example 1
m＜f＜f
sThe time override signal sequential chart, waveform from top to bottom is respectively among the figure: primary resonant electric current and exciting current, secondary commutation electric current, main switch drive.Can learn from above waveform:
1. as f 〉=f
s(f
sBe L among Fig. 1
rAnd C
rResonance frequency) time, secondary rectified current I
SrLag behind the drive waveforms V of main switch
GsParticularly especially obvious under the situation of underloading, so the driving of synchronous rectification switch SR1 and SR2 should postpone open-minded than the driving of corresponding master power switch Q1 and Q2, otherwise can cause two synchronous rectification switch SR1 and SR2 open-minded simultaneously, constitute a low-impedance path, produce great electric current, and then the infringement lock-in tube.
2. work as f
m＜f＜f
s(f
mBe L among Fig. 1
r, C
rAnd L
mResonance frequency) during underloading, the secondary side rectified current still was zero when the primary side power tube was opened, postpone a period of time after rectified current become positive current.If synchronous rectifier drives consistent with the driving of primary side switching tube, will produce negative current at the conducting initial period, energy is to elementary transmission.Therefore the service time of synchronous rectification switch pipe should postpone than primary side power switch pipe.Circuit work frequency f in addition
m＜f＜f
sThe time, the ON time of secondary side synchronous rectification switch pipe is constant, is L
rAnd C
rHalf of series resonance cycle.
From above conclusion as can be seen, the synchronous rectification control method that the embodiment of the invention provides is based on the above fact, according to the frequency of input power switch pipe (promptly, input switch pipe turn-on frequency), the resonance frequency of load state and circuit (that is the resonance frequency of LLC resonant circuit) is obtained the drive signal of synchronous rectification switch.Turn-off the lock-in tube drive signal in underloading or Light Condition, to prevent to produce negative electric current.In addition (promptly at switching frequency, during input switch pipe turn-on frequency) greater than resonance frequency, the lock-in tube drive signal power tube drive signal corresponding with it compared, the delay regular hour opens, turn-offs (promptly simultaneously, the turn-off time of lock-in tube drive signal is identical with the turn-off time of power tube drive signal), prevented the common problem of synchronous rectifier under the heavily loaded situation.
Example 2
Fig. 7 is that as shown in Figure 7, this control device is made up of sampling feedback circuit 301, controller 302, drive circuit 303～305 according to the control device structural representation of the LLC controlled resonant converter control method of example 2 and the application of synchronous rectification control method thereof.Its middle controller 302 adopts digital signal processors (DSP), output primary side power switch and the required control signal of synchronous rectification switch, drive circuit 303～305 with control signal convert to can the driving power switch drive signal.
Fig. 8 is the generation flow chart according to the primary side power switch control signal of example 2, and as shown in Figure 8, the production process of primary side power switch control signal may further comprise the steps 801 to step 807:
Step 804 starts and transfers wide loop, and fixedly highest frequency adopts and transfers the PI parameter of wide loop to carry out the PI computing of voltage, output duty cycle again.
Fig. 9 is the algorithm flow chart according to the synchronous rectification control method of example 2, and DSP produces the control impuls of synchronous rectification switch through this synchronous rectification Processing Algorithm.As shown in Figure 9, mainly may further comprise the steps:
Whether step 904, judgment task frequency greater than Fs, and wherein Fs is the resonance frequency of Lr and Cr among Fig. 1.If greater than the frequency resonance frequency then enter step 905, if switching frequency smaller or equal to resonance frequency, then enters step 906.
Device embodiment
According to embodiments of the invention, a kind of LLC controlled resonant converter controller is provided, this controller is used for the LLC controlled resonant converter control method that realizes that said method embodiment describes.Figure 10 is the structured flowchart according to the LLC controlled resonant converter controller of the embodiment of the invention, as shown in figure 10, this controller comprises: judge module 101, be used for judging according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, wherein, predetermined state comprises: light condition or Light Condition; First adjusting module 103 is connected in judge module 101, is used for being judged as under the situation that is at judge module 101, resonant circuit is operated in transfers wide control model; Second adjusting module 105 is connected in judge module 101, is used for being judged as under the situation not at judge module 101, makes resonant circuit be operated in the frequency modulation control pattern.
Wherein, judge module 101 comprises: obtain submodule 107, be used to obtain the feedback signal of load; Calculating sub module 109 is connected in and obtains submodule 107, is used for according to obtaining the feedback signal calculating input switch pipe turn-on frequency that submodule 107 obtains.
According to embodiments of the invention, a kind of synchronous commutation control device is provided, this controller is used for the synchronous rectification control method that realizes that said method embodiment describes. and Figure 11 is the structured flowchart according to the synchronous commutation control device of the embodiment of the invention, as shown in figure 11, this device comprises: judge module 111, be used for judging according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, and wherein, predetermined state comprises: light condition or Light Condition; Drive closing module 113, be connected in judge module 111, be used for being judged as under the situation that is, close lock-in tube and drive at judge module 111; The first drive signal control module 115, be connected in judge module 111, be used for being judged as not at judge module 111, and under the situation of input switch pipe turn-on frequency greater than the resonance frequency of LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in the power tube drive signal corresponding with the lock-in tube drive signal, closing of lock-in tube drive signal is synchronized with closing of power tube drive signal.
Preferably, said apparatus can also comprise: the second drive signal control module 117, be connected in judge module 111, be used for being judged as not at judge module 111, and input switch pipe turn-on frequency is less than or equal under the situation of resonance frequency of LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in the power tube drive signal, and the pulse duration of lock-in tube drive signal is half of harmonic period of LLC resonant circuit.
In sum, the scheme that the embodiment of the invention provides compared with prior art, have the following advantages: in the frequency modulation control mode, introduce and transfer wide control mode, make and when operating frequency is low, adopt the frequency modulation control mode, when operating frequency is higher, adopt and transfer wide control mode, solved the difficult problem that zero load of LLC resonant circuit or underloading are difficult to voltage stabilizing; Under underloading or Light Condition, turn-off lock-in tube and drive, prevent to produce negative electric current, during greater than resonance frequency, the lock-in tube drive signal power tube drive signal corresponding with it compared, and postpones open-minded at switching frequency, prevented the common problem of synchronous rectifier under the heavily loaded situation, practical more reliable; Open and to change along with the operating frequency of LLC resonant circuit time of delay, thereby make in the synchronous rectification body diode current flow time few as far as possible, reduce the wastage, improved efficient effectively; Be easy to realize in digital control field, can simplify the peripheral hardware circuit effectively.
Need to prove, can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a LLC controlled resonant converter control method is characterized in that, comprising:
Judge according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state, if, described LLC resonant circuit is operated in transfers wide control model, otherwise, make described LLC resonant circuit be operated in the frequency modulation control pattern, wherein, described predetermined state comprises light condition or Light Condition.
2. method according to claim 1 is characterized in that, judges according to the described input switch pipe turn-on frequency of described LLC resonant circuit whether described load is operated in before the described predetermined state, and described method also comprises:
Obtain the feedback signal of described load, calculate described input switch pipe turn-on frequency according to described feedback signal.
3. method according to claim 2 is characterized in that, it is one of following that described feedback signal comprises: output voltage, output current.
4. method according to claim 2 is characterized in that, calculates described input switch pipe turn-on frequency according to described feedback signal and comprises:
The absolute value of the difference of described feedback signal and predetermined value is carried out multiply by certain proportion after the integral operation obtain described input switch pipe turn-on frequency.
5. method according to claim 1 is characterized in that, judges according to the described input switch pipe turn-on frequency of described LLC resonant circuit whether described load is operated in described predetermined state and comprises:
Whether the described input switch pipe turn-on frequency of judging described LLC resonant circuit greater than preset frequency, if, then judge described loaded work piece at described predetermined state, otherwise, judge that described load is not operated in described predetermined state.
6. synchronous rectification control method is applied to use the LLC resonant circuit of the described method of claim 1, it is characterized in that, comprising:
Judge according to the input switch pipe turn-on frequency of described LLC resonant circuit whether load is operated in predetermined state, if then close lock-in tube and drive; Otherwise, under the situation of described input switch pipe turn-on frequency greater than the resonance frequency of described LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in the power tube drive signal corresponding with described lock-in tube drive signal, closing of described lock-in tube drive signal is synchronized with closing of described power tube drive signal, wherein, described predetermined state comprises light condition or Light Condition.
7. method according to claim 6, it is characterized in that, described method also comprises: be less than or equal at described input switch pipe turn-on frequency under the situation of resonance frequency of described LLC resonant circuit, the opening of lock-in tube drive signal postpones open-minded in described power tube drive signal, and the pulse duration of described lock-in tube drive signal is half of harmonic period of described LLC resonant circuit.
8. method according to claim 6 is characterized in that, the opening of described power tube drive signal that postpones in corresponding with described lock-in tube drive signal of opening of described lock-in tube drive signal comprises:
Behind delay scheduled time on the service time of described power tube drive signal, open described lock-in tube drive signal, the wherein said scheduled time comprises one of following: set time, the time that changes with the operating frequency of described LLC resonant circuit.
9. LLC controlled resonant converter controller is characterized in that described controller comprises:
Judge module is used for judging according to the input switch pipe turn-on frequency of LLC resonant circuit whether load is operated in predetermined state that wherein, described predetermined state comprises: light condition or Light Condition;
First adjusting module is used for being judged as under the situation that is at described judge module, described resonant circuit is operated in transfers wide control model;
Second adjusting module is used for being judged as under the situation not at described judge module, makes described resonant circuit be operated in the frequency modulation control pattern.
10. LLC controlled resonant converter controller according to claim 9 is characterized in that described judge module comprises:
Obtain submodule, be used to obtain the feedback signal of described load;
Calculating sub module is used for obtaining the described feedback signal that submodule obtains and calculating described input switch pipe turn-on frequency according to described.
11. a synchronous commutation control device is characterized in that, comprising:
Judge module is used for leading according to the input switch pipe of described LLC resonant circuit
Logical frequency judges whether load is operated in predetermined state, and wherein, described predetermined state comprises: light condition or Light Condition;
Drive closing module, be used for being judged as under the situation that is, close lock-in tube and drive at described judge module;
The first drive signal control module, be used for being judged as not at described judge module, and under the situation of described input switch pipe turn-on frequency greater than the resonance frequency of described LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in the power tube drive signal corresponding with described lock-in tube drive signal, closing of described lock-in tube drive signal is synchronized with closing of described power tube drive signal.
12. device according to claim 11 is characterized in that, described device also comprises:
The second drive signal control module, be used for being judged as not at described judge module, and described input switch pipe turn-on frequency is less than or equal under the situation of resonance frequency of described LLC resonant circuit, make opening of lock-in tube drive signal postpone open-minded in described power tube drive signal, and the pulse duration of described lock-in tube drive signal is half of harmonic period of described LLC resonant circuit.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910221471A CN101707440A (en) | 2009-11-12 | 2009-11-12 | LLC resonant converter control method, synchronous rectification control method and device |
| IN5129DEN2012 IN2012DN05129A (en) | 2009-11-12 | 2010-09-26 | |
| PCT/CN2010/077332 WO2011057523A1 (en) | 2009-11-12 | 2010-09-26 | Method for controlling logical link control resonant converter, method for controlling synchronous rectification and devices thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910221471A CN101707440A (en) | 2009-11-12 | 2009-11-12 | LLC resonant converter control method, synchronous rectification control method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707440A true CN101707440A (en) | 2010-05-12 |
Family
ID=42377638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910221471A Pending CN101707440A (en) | 2009-11-12 | 2009-11-12 | LLC resonant converter control method, synchronous rectification control method and device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101707440A (en) |
| IN (1) | IN2012DN05129A (en) |
| WO (1) | WO2011057523A1 (en) |
Cited By (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057523A1 (en) * | 2009-11-12 | 2011-05-19 | 中兴通讯股份有限公司 | Method for controlling logical link control resonant converter, method for controlling synchronous rectification and devices thereof |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN102437750A (en) * | 2011-10-31 | 2012-05-02 | 上海大学 | Digital control device and method of LLC (Logic Link Control) synchronous rectification resonant converter |
| CN102497105A (en) * | 2011-12-02 | 2012-06-13 | 深圳市菱晟科技有限公司 | Synchronous-rectification flyback switching power supply device and control method thereof |
| CN102545614A (en) * | 2010-12-16 | 2012-07-04 | 台达电子工业股份有限公司 | Resonant type power supply conversion circuit |
| CN102545570A (en) * | 2010-11-19 | 2012-07-04 | 世系动力公司 | Llc converter active snubber circuit and method of operation thereof |
| CN102857103A (en) * | 2011-06-30 | 2013-01-02 | 艾默生网络能源***北美公司 | Three-level LLC (Logical Link Control) direct-current converter and control method thereof |
| CN102857095A (en) * | 2011-06-28 | 2013-01-02 | 世系动力公司 | Optimization of a power converter employing an LLC converter |
| CN103023335A (en) * | 2012-12-27 | 2013-04-03 | 万仁春 | LLC (logical link control) converter synchronous rectification method and device |
| CN103066853A (en) * | 2012-12-24 | 2013-04-24 | 成都芯源***有限公司 | Control circuit, switching power supply and control method thereof |
| WO2013078851A1 (en) * | 2011-12-02 | 2013-06-06 | 中兴通讯股份有限公司 | Current-limiting protection method and device for resonance circuit |
| CN103326587A (en) * | 2013-07-17 | 2013-09-25 | 潘海铭 | Light load control method and device of LLC (Liquid Level Control) resonant converter |
| WO2013167002A1 (en) * | 2012-10-31 | 2013-11-14 | 中兴通讯股份有限公司 | Method for controlling series resonant converter |
| CN103731036A (en) * | 2012-10-12 | 2014-04-16 | 富士电机株式会社 | Bi-directional DC/DC converter |
| CN104333240A (en) * | 2014-11-21 | 2015-02-04 | 小米科技有限责任公司 | Resonant rectifying device, resonant rectifying control method and device |
| WO2015070740A1 (en) * | 2013-11-12 | 2015-05-21 | Huawei Technologies Co., Ltd. | Gate drive apparatus for resonant converters |
| CN104716960A (en) * | 2015-03-30 | 2015-06-17 | 安徽师范大学 | Digital LLC circuit acquisition control method based on DSP |
| CN104734502A (en) * | 2015-04-13 | 2015-06-24 | 无锡新硅微电子有限公司 | Efficient light load implementing circuit for DC-DC (direct current-direct current) converter |
| CN106211408A (en) * | 2016-06-30 | 2016-12-07 | 广东美的厨房电器制造有限公司 | The control method of microwave oven and microwave oven |
| CN106300984A (en) * | 2015-05-29 | 2017-01-04 | 三垦电气（上海）有限公司 | The control method of LLC circuit and electronic equipment |
| CN106358354A (en) * | 2016-11-15 | 2017-01-25 | 上海联影医疗科技有限公司 | X-ray high-voltage generator, control circuit of resonant converter and control method |
| CN107666244A (en) * | 2016-07-29 | 2018-02-06 | 中兴通讯股份有限公司 | A kind of control method and device of controlled resonant converter |
| CN108880268A (en) * | 2018-08-01 | 2018-11-23 | 北京理工大学 | The multi-mode control method of the semi-active bridge DC-DC converter of voltage-source type |
| CN108988641A (en) * | 2017-06-01 | 2018-12-11 | 现代自动车株式会社 | Control the method for the onboard charger of vehicle and the onboard charger system of vehicle |
| CN108988648A (en) * | 2018-07-06 | 2018-12-11 | 华南理工大学 | A kind of LLC resonant converter synchronous rectification forecast Control Algorithm |
| CN109768711A (en) * | 2019-02-28 | 2019-05-17 | 深圳市西林电气技术有限公司 | A kind of synchronous commutating control circuit and method |
| CN109863675A (en) * | 2016-10-26 | 2019-06-07 | 德州仪器公司 | For operating the method and circuit of Switching power |
| WO2019136662A1 (en) * | 2018-01-11 | 2019-07-18 | 深圳欣锐科技股份有限公司 | Llc controller and control method |
| CN110138230A (en) * | 2019-06-25 | 2019-08-16 | 西安特锐德智能充电科技有限公司 | Resonance circuit control method, power circuit and charging pile |
| CN110391804A (en) * | 2019-07-23 | 2019-10-29 | 深圳市海派特光伏科技有限公司 | Electronic cigarette automatic frequency adjustment method, apparatus, equipment and storage medium |
| CN110957916A (en) * | 2019-01-15 | 2020-04-03 | 郑州嘉晨电器有限公司 | Digital synchronous rectification method of half-bridge LLC converter |
| CN111200365A (en) * | 2020-03-02 | 2020-05-26 | 上海南芯半导体科技有限公司 | Control method and control circuit of flyback converter |
| CN111769742A (en) * | 2020-05-06 | 2020-10-13 | 国网江苏省电力有限公司电力科学研究院 | Method, device and system for calculating control dead zone of resonant bidirectional active bridge |
| CN112436732A (en) * | 2020-11-13 | 2021-03-02 | 北京航天发射技术研究所 | Full-digital control method and control system for light-load intermittent output of power supply |
| WO2021056652A1 (en) * | 2019-09-29 | 2021-04-01 | 株洲中车时代电气股份有限公司 | Gain frequency modulation method and related apparatus |
| CN112953180A (en) * | 2021-04-26 | 2021-06-11 | 江苏应能微电子有限公司 | Switching power supply on-time control method and device and switching power supply |
| CN113904559A (en) * | 2021-09-29 | 2022-01-07 | 天水七四九电子有限公司 | Double closed-loop control LLC converter and working method thereof |
| CN114094837A (en) * | 2021-11-15 | 2022-02-25 | 珠海格力电器股份有限公司 | Synchronous rectification control method, circuit, device, equipment and storage medium |
| CN115173714A (en) * | 2022-08-09 | 2022-10-11 | 河北科技大学 | Light-load operation control system and method for three-phase CLLLC resonant converter |
| CN117277787A (en) * | 2023-09-25 | 2023-12-22 | 苏州博沃创新能源科技有限公司 | High-voltage wide-voltage-range input power DC-DC converter and control method |
| CN117424459A (en) * | 2023-12-19 | 2024-01-19 | 苏州元脑智能科技有限公司 | Power supply control circuit and method |
| EP4195485A4 (en) * | 2020-12-24 | 2024-03-20 | Contemporary Amperex Technology Co., Limited | Isolated resonant conversion control method, apparatus and system, and readable storage medium |
| WO2024066480A1 (en) * | 2022-09-29 | 2024-04-04 | 台达电子工业股份有限公司 | Dual-mode charge control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100541992C (en) * | 2003-09-08 | 2009-09-16 | 艾默生网络能源有限公司 | The control method of series-resonant direct-current/direct-current converter and device |
| CN100424975C (en) * | 2005-02-25 | 2008-10-08 | 台达电子工业股份有限公司 | LLC series resonant converter and its synchronous rectifying power switch driving method |
| CN1996730A (en) * | 2006-12-27 | 2007-07-11 | 中国科学院上海光学精密机械研究所 | High-efficiency synchronous rectification buck-type switch converter |
| JP4925922B2 (en) * | 2007-05-23 | 2012-05-09 | ルネサスエレクトロニクス株式会社 | Switching regulator |
| CN101707440A (en) * | 2009-11-12 | 2010-05-12 | 中兴通讯股份有限公司 | LLC resonant converter control method, synchronous rectification control method and device |
-
2009
- 2009-11-12 CN CN200910221471A patent/CN101707440A/en active Pending
-
2010
- 2010-09-26 IN IN5129DEN2012 patent/IN2012DN05129A/en unknown
- 2010-09-26 WO PCT/CN2010/077332 patent/WO2011057523A1/en active Application Filing
Cited By (68)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011057523A1 (en) * | 2009-11-12 | 2011-05-19 | 中兴通讯股份有限公司 | Method for controlling logical link control resonant converter, method for controlling synchronous rectification and devices thereof |
| CN102545570A (en) * | 2010-11-19 | 2012-07-04 | 世系动力公司 | Llc converter active snubber circuit and method of operation thereof |
| CN102545570B (en) * | 2010-11-19 | 2015-05-20 | 通用电气公司 | Llc converter active snubber circuit and method of operation thereof |
| CN102545614A (en) * | 2010-12-16 | 2012-07-04 | 台达电子工业股份有限公司 | Resonant type power supply conversion circuit |
| CN102857095B (en) * | 2011-06-28 | 2015-04-01 | 通用电气公司 | Power converter and method employing an LLC converter |
| CN102857095A (en) * | 2011-06-28 | 2013-01-02 | 世系动力公司 | Optimization of a power converter employing an LLC converter |
| CN102857103A (en) * | 2011-06-30 | 2013-01-02 | 艾默生网络能源***北美公司 | Three-level LLC (Logical Link Control) direct-current converter and control method thereof |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN102437750A (en) * | 2011-10-31 | 2012-05-02 | 上海大学 | Digital control device and method of LLC (Logic Link Control) synchronous rectification resonant converter |
| CN102437750B (en) * | 2011-10-31 | 2014-07-30 | 上海大学 | Digital control device and method of LLC (Logic Link Control) synchronous rectification resonant converter |
| WO2013078851A1 (en) * | 2011-12-02 | 2013-06-06 | 中兴通讯股份有限公司 | Current-limiting protection method and device for resonance circuit |
| CN102497105A (en) * | 2011-12-02 | 2012-06-13 | 深圳市菱晟科技有限公司 | Synchronous-rectification flyback switching power supply device and control method thereof |
| CN103731036A (en) * | 2012-10-12 | 2014-04-16 | 富士电机株式会社 | Bi-directional DC/DC converter |
| CN103731036B (en) * | 2012-10-12 | 2017-10-13 | 富士电机株式会社 | Two-way DC/DC converters |
| US9425676B2 (en) | 2012-10-31 | 2016-08-23 | Zte Corporation | Control method for series resonant converter |
| WO2013167002A1 (en) * | 2012-10-31 | 2013-11-14 | 中兴通讯股份有限公司 | Method for controlling series resonant converter |
| CN103795252A (en) * | 2012-10-31 | 2014-05-14 | 中兴通讯股份有限公司 | Control method of series resonant converter |
| CN103795252B (en) * | 2012-10-31 | 2016-02-24 | 中兴通讯股份有限公司 | A kind of control method of series resonant converter |
| CN103066853B (en) * | 2012-12-24 | 2015-02-04 | 成都芯源***有限公司 | Control circuit, switching power supply and control method thereof |
| CN103066853A (en) * | 2012-12-24 | 2013-04-24 | 成都芯源***有限公司 | Control circuit, switching power supply and control method thereof |
| CN103023335A (en) * | 2012-12-27 | 2013-04-03 | 万仁春 | LLC (logical link control) converter synchronous rectification method and device |
| CN103326587B (en) * | 2013-07-17 | 2015-09-30 | 潘海铭 | LLC resonant converter underload control method and device |
| CN103326587A (en) * | 2013-07-17 | 2013-09-25 | 潘海铭 | Light load control method and device of LLC (Liquid Level Control) resonant converter |
| US9876435B2 (en) | 2013-11-12 | 2018-01-23 | Futurewei Technologies, Inc. | Gate drive apparatus for resonant converters |
| US10340807B2 (en) | 2013-11-12 | 2019-07-02 | Futurewei Technologies, Inc. | Gate drive apparatus for resonant converters |
| US9479073B2 (en) | 2013-11-12 | 2016-10-25 | Futurewei Technologies, Inc. | Gate drive apparatus for resonant converters |
| WO2015070740A1 (en) * | 2013-11-12 | 2015-05-21 | Huawei Technologies Co., Ltd. | Gate drive apparatus for resonant converters |
| CN104333240A (en) * | 2014-11-21 | 2015-02-04 | 小米科技有限责任公司 | Resonant rectifying device, resonant rectifying control method and device |
| CN104716960A (en) * | 2015-03-30 | 2015-06-17 | 安徽师范大学 | Digital LLC circuit acquisition control method based on DSP |
| CN104716960B (en) * | 2015-03-30 | 2018-07-24 | 安徽师范大学 | A kind of digitlization LLC circuit collection control methods based on DSP |
| CN104734502B (en) * | 2015-04-13 | 2017-04-05 | 无锡新硅微电子有限公司 | A kind of DC DC changers underloading efficiently realizes circuit |
| CN104734502A (en) * | 2015-04-13 | 2015-06-24 | 无锡新硅微电子有限公司 | Efficient light load implementing circuit for DC-DC (direct current-direct current) converter |
| CN106300984A (en) * | 2015-05-29 | 2017-01-04 | 三垦电气（上海）有限公司 | The control method of LLC circuit and electronic equipment |
| CN106211408B (en) * | 2016-06-30 | 2019-12-31 | 广东美的厨房电器制造有限公司 | Control method of microwave oven and microwave oven |
| CN106211408A (en) * | 2016-06-30 | 2016-12-07 | 广东美的厨房电器制造有限公司 | The control method of microwave oven and microwave oven |
| CN107666244A (en) * | 2016-07-29 | 2018-02-06 | 中兴通讯股份有限公司 | A kind of control method and device of controlled resonant converter |
| CN107666244B (en) * | 2016-07-29 | 2020-11-27 | 中兴通讯股份有限公司 | Control method and device of resonant converter |
| CN109863675A (en) * | 2016-10-26 | 2019-06-07 | 德州仪器公司 | For operating the method and circuit of Switching power |
| CN109863675B (en) * | 2016-10-26 | 2021-02-05 | 德州仪器公司 | Method and circuit for operating a switched power supply |
| CN106358354A (en) * | 2016-11-15 | 2017-01-25 | 上海联影医疗科技有限公司 | X-ray high-voltage generator, control circuit of resonant converter and control method |
| CN108988641B (en) * | 2017-06-01 | 2023-04-07 | 现代自动车株式会社 | Method of controlling on-board charger of vehicle and on-board charger system of vehicle |
| CN108988641A (en) * | 2017-06-01 | 2018-12-11 | 现代自动车株式会社 | Control the method for the onboard charger of vehicle and the onboard charger system of vehicle |
| WO2019136662A1 (en) * | 2018-01-11 | 2019-07-18 | 深圳欣锐科技股份有限公司 | Llc controller and control method |
| CN108988648A (en) * | 2018-07-06 | 2018-12-11 | 华南理工大学 | A kind of LLC resonant converter synchronous rectification forecast Control Algorithm |
| CN108880268A (en) * | 2018-08-01 | 2018-11-23 | 北京理工大学 | The multi-mode control method of the semi-active bridge DC-DC converter of voltage-source type |
| CN110957916A (en) * | 2019-01-15 | 2020-04-03 | 郑州嘉晨电器有限公司 | Digital synchronous rectification method of half-bridge LLC converter |
| CN110957916B (en) * | 2019-01-15 | 2022-05-03 | 河南嘉晨智能控制股份有限公司 | Digital synchronous rectification method of half-bridge LLC converter |
| CN109768711A (en) * | 2019-02-28 | 2019-05-17 | 深圳市西林电气技术有限公司 | A kind of synchronous commutating control circuit and method |
| CN110138230A (en) * | 2019-06-25 | 2019-08-16 | 西安特锐德智能充电科技有限公司 | Resonance circuit control method, power circuit and charging pile |
| CN110391804B (en) * | 2019-07-23 | 2023-03-14 | 深圳市海派特光伏科技有限公司 | Automatic frequency modulation method, device and equipment for electronic cigarette and storage medium |
| CN110391804A (en) * | 2019-07-23 | 2019-10-29 | 深圳市海派特光伏科技有限公司 | Electronic cigarette automatic frequency adjustment method, apparatus, equipment and storage medium |
| WO2021056652A1 (en) * | 2019-09-29 | 2021-04-01 | 株洲中车时代电气股份有限公司 | Gain frequency modulation method and related apparatus |
| CN111200365B (en) * | 2020-03-02 | 2021-07-09 | 上海南芯半导体科技有限公司 | Control method and control circuit of flyback converter |
| CN111200365A (en) * | 2020-03-02 | 2020-05-26 | 上海南芯半导体科技有限公司 | Control method and control circuit of flyback converter |
| CN111769742A (en) * | 2020-05-06 | 2020-10-13 | 国网江苏省电力有限公司电力科学研究院 | Method, device and system for calculating control dead zone of resonant bidirectional active bridge |
| CN112436732A (en) * | 2020-11-13 | 2021-03-02 | 北京航天发射技术研究所 | Full-digital control method and control system for light-load intermittent output of power supply |
| EP4195485A4 (en) * | 2020-12-24 | 2024-03-20 | Contemporary Amperex Technology Co., Limited | Isolated resonant conversion control method, apparatus and system, and readable storage medium |
| CN112953180A (en) * | 2021-04-26 | 2021-06-11 | 江苏应能微电子有限公司 | Switching power supply on-time control method and device and switching power supply |
| CN112953180B (en) * | 2021-04-26 | 2023-06-23 | 江苏应能微电子有限公司 | Switching power supply on time control method and device and switching power supply |
| CN113904559A (en) * | 2021-09-29 | 2022-01-07 | 天水七四九电子有限公司 | Double closed-loop control LLC converter and working method thereof |
| CN114094837A (en) * | 2021-11-15 | 2022-02-25 | 珠海格力电器股份有限公司 | Synchronous rectification control method, circuit, device, equipment and storage medium |
| CN114094837B (en) * | 2021-11-15 | 2023-10-10 | 珠海格力电器股份有限公司 | Synchronous rectification control method, circuit, device, equipment and storage medium |
| CN115173714A (en) * | 2022-08-09 | 2022-10-11 | 河北科技大学 | Light-load operation control system and method for three-phase CLLLC resonant converter |
| CN115173714B (en) * | 2022-08-09 | 2023-05-23 | 河北科技大学 | Light load operation control system and method for three-phase CLLLC resonant converter |
| WO2024066480A1 (en) * | 2022-09-29 | 2024-04-04 | 台达电子工业股份有限公司 | Dual-mode charge control method |
| CN117277787A (en) * | 2023-09-25 | 2023-12-22 | 苏州博沃创新能源科技有限公司 | High-voltage wide-voltage-range input power DC-DC converter and control method |
| CN117424459A (en) * | 2023-12-19 | 2024-01-19 | 苏州元脑智能科技有限公司 | Power supply control circuit and method |
| CN117424459B (en) * | 2023-12-19 | 2024-03-01 | 苏州元脑智能科技有限公司 | Power supply control circuit and method |
Also Published As
| Publication number | Publication date |
|---|---|
| IN2012DN05129A (en) | 2015-10-23 |
| WO2011057523A1 (en) | 2011-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101707440A (en) | LLC resonant converter control method, synchronous rectification control method and device | |
| US8184456B1 (en) | Adaptive power converter and related circuitry | |
| US9882389B2 (en) | High efficiency DC/DC converter and controller | |
| Kim et al. | Analysis and design of a multioutput converter using asymmetrical PWM half-bridge flyback converter employing a parallel–series transformer | |
| Baggio et al. | Isolated interleaved-phase-shift-PWM DC-DC ZVS converter | |
| US20200366211A1 (en) | Control method of power conversion circuit, and related power conversion circuit | |
| WO2020015391A1 (en) | Control method for improving output precision of switching power supply | |
| Shih et al. | Adaptive DC-link voltage control of LLC resonant converter | |
| Li et al. | A modulation method for capacitance reduction in active-clamp flyback-based AC–DC adapters | |
| CN116613976A (en) | Power conversion circuit, control method thereof, battery pack and energy storage system | |
| Yao et al. | Push–pull forward three-level converter with reduced rectifier voltage stress | |
| Nene et al. | Digital controller with integrated valley switching control for light load efficiency and THD improvements in PFC converter | |
| US11658580B2 (en) | Control method for DC converter and DC converter | |
| Yuan et al. | Zero-voltage switching for three-level capacitor clamping inverter | |
| CN110994986B (en) | Power supply control method | |
| US8023295B1 (en) | Direct current (DC) to alternating current (AC) generation | |
| CN110429821B (en) | Electrolytic capacitor-free single-stage single-phase isolated AC/DC converter integrated with power factor correction function | |
| Jiao et al. | Llc resonant converter based single-stage inverter with multi-resonant branches using variable frequency modulation | |
| Wen et al. | A mhz llc converter based single-stage soft-switching isolated inverter with hybrid modulation method | |
| CN111596130A (en) | Method for improving efficiency of energy router by utilizing resonant frequency detection technology | |
| US7215040B2 (en) | Half-bridge converter with zero-voltage switching and snubber | |
| KR102363847B1 (en) | Power optimizer, and its method of control method of pv grid connected system using thereof | |
| KR100689326B1 (en) | Dc power supply apparatus and method | |
| CN201726326U (en) | Half-bridge soft switching power source with passive power factor correcting circuit | |
| US20240243604A1 (en) | Power conversion circuit and control method thereof, battery pack, and energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100512 |