CN110729906A - Zero-voltage conversion CLL resonant DC-DC converter and control method thereof - Google Patents

Zero-voltage conversion CLL resonant DC-DC converter and control method thereof Download PDF

Info

Publication number
CN110729906A
CN110729906A CN201911124311.8A CN201911124311A CN110729906A CN 110729906 A CN110729906 A CN 110729906A CN 201911124311 A CN201911124311 A CN 201911124311A CN 110729906 A CN110729906 A CN 110729906A
Authority
CN
China
Prior art keywords
switch
diode
converter
same
circuit
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
Application number
CN201911124311.8A
Other languages
Chinese (zh)
Inventor
陈景文
周光荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shaanxi University of Science and Technology
Original Assignee
Shaanxi University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shaanxi University of Science and Technology filed Critical Shaanxi University of Science and Technology
Priority to CN201911124311.8A priority Critical patent/CN110729906A/en
Publication of CN110729906A publication Critical patent/CN110729906A/en
Pending legal-status Critical Current

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
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention discloses a zero voltage conversion CLL resonant DC-DC converter, which comprises a full-bridge HF converter, a zero voltage conversion ZVT auxiliary circuit, a CLL resonant circuit, an isolation transformer, a diode rectifying circuit, an energy storage filter circuit and a load, wherein the full-bridge HF converter is connected with the zero voltage conversion ZVT auxiliary circuit; the ZVT auxiliary circuit comprises an absorption capacitor, a MOFET tube, an auxiliary inductor and an auxiliary diode; the CLL resonant circuit comprises a capacitorC s InductorL r AndL t and is bridged between output ports A and B of the HF converter; a two-winding high-frequency transformer is arranged between the capacitor energy storage filter circuit and the diode rectifier bridge; the rectifying circuit supplies power to a load through output filtering; the ZVT auxiliary circuit and the CLL resonant circuit can effectively reduce the switching loss, further improve the efficiency of the converter, have smaller running time interval and consumed power, and realize the integral running optimization of the converter.

Description

Zero-voltage conversion CLL resonant DC-DC converter and control method thereof
Technical Field
The invention relates to a zero-voltage conversion CLL resonant DC-DC converter and a control method thereof, belonging to the technical field of power electronic soft switching.
Background
Renewable energy has been the most promising alternative to traditional energy sources, the power generated using renewable energy sources fluctuates greatly, and a power conditioning unit is required to convert this varying power to a constant power that is available. A DC-DC converter is one of the most important components of this power conditioning unit. Pulse Width Modulated (PWM) DC-DC converters for regulating the output power cause large switching losses due to hard switching. With high switching frequencies, these switching losses increase significantly, resulting in reduced efficiency. To overcome this drawback, various DC-DC resonant converter topologies have been proposed. Resonant converters containing LC tank elements can be designed with soft switching functions, i.e. Zero-voltage switching (ZVS) or Zero-current switching (ZCS), to reduce switching losses, switching stress and Electromagnetic Interference (EMI). Therefore, High-frequency (HF) switches can be used to minimize the size and weight of the converter, thereby increasing the power density of the converter. Since the output voltage of renewable energy power generation systems varies widely, the resonant converter must remain soft-switched to achieve higher efficiency while regulating the output voltage constant.
However, under no-load conditions, it is difficult for Series Resonant Converters (SRC) to regulate output voltage, and some researchers have proposed Parallel Resonant Converters (PRC) but the light load efficiency is low. There are also Series-parallel (LCC) and (Modified-Series resonant) resonant converters. However, the improvement of the light load efficiency of the LCC converter is still insufficient. This variable frequency control, which improves efficiency by changing the switching frequency, creates EMI and problems associated with filter and magnetic design, and makes it difficult to effectively utilize parasitic components of the transformer.
Disclosure of Invention
The invention aims to provide a zero-voltage conversion CLL resonant DC-DC converter based on soft switch CLL resonant converter regulation to realize constant output voltage and high efficiency. To overcome the shortcomings of the prior art.
The invention achieves the above purpose by the following technical method:
1. the zero voltage conversion CLL resonance DC-DC converter comprises a full-bridge HF converter, a CLL resonance circuit, an isolation transformer, a diode rectifying circuit, an energy storage circuit and is characterized by further comprising:
zero voltage transition ZVT auxiliary circuit, including MOFET tube SaDiode D1z、D2zAnd an auxiliary capacitor CzAnd an auxiliary inductor Lz(ii) a The zero-voltage conversion ZVT auxiliary circuit is connected with the full-bridge HF converter in parallel and is used for connecting a direct-current power supply VsThe positive electrode and the negative electrode of (1); the diode D1zAnd auxiliary inductor LzTwo MOFET tubes S connected in series to the bridge arms of a full-bridge HF converter1、S4To (c) to (d); the auxiliary capacitor CzAnd MOFET tube SaDiode D connected in series in reverse direction after being connected in parallel2zConnected to one end of a full bridge HF transformer.
2. The DC-DC converter only uses one ZVT auxiliary circuit, can assist all switching tubes to be switched on at ZVS, and can provide ZCS function for a rectifier diode at the secondary side of the HF transformer;
3. the CLL resonant circuit has the advantages of series and parallel resonance, and can inherently regulate circulating current while maintaining the ZVS of the switching tube;
4. by adopting a control method of the DC-DC converter based on pulse width modulation gating, ZVS can be provided for all switching tubes to adapt to the changes of load and input voltage conditions;
5. the DC-DC converter inputs current i through a rectifying circuitr_inAnd parallel inductor current iLpThe waveform is used for identifying the CCM mode or the DCM mode for control.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the DC-DC converter comprises the ZVT auxiliary circuit and the CLL resonant circuit, can effectively reduce the switching loss, improve the efficiency of the converter, has smaller running time interval and consumed power, and realizes the integral running optimization of the converter. And can adapt to the changes of load and input voltage conditions, realize the converter and work in CCM or DCM high efficiency.
Drawings
FIG. 1 is a full bridge CLL resonant converter circuit with a capacitive output filter according to the present invention;
FIG. 2 is an equivalent circuit diagram of an isolation transformer of the DC-DC converter of the present invention and a simplified circuit diagram thereof;
FIG. 3 is a diagram of typical operating waveforms and gating patterns for a CLL resonant DC-DC converter of the present invention at minimum input voltage;
fig. 4 is an equivalent circuit diagram of the converter at different operating stages in CCM mode according to the present invention: (a) stage I, (b) stage II, (c) stage III, (d) stage IV and (e) stage V;
FIG. 5 shows typical operating waveforms and gating patterns of the DC-DC converter operating in DCM at the maximum input voltage of the present invention: (a) no ZVT, (b) with ZVT;
fig. 6 is an equivalent circuit diagram of the converter in different operation stages in DCM of the present invention: (a) - (b) stage vi', (c) - (d) stage vi ";
the corresponding part names indicated by the numbers in the figures: 1. a direct current power supply; 2. an HF full bridge converter; 3. a ZVT auxiliary circuit; 4. a CLL resonant conversion circuit; 5. an isolation transformer; 6. a diode rectifying circuit; 7. a capacitive storage filter circuit; 8. and (4) loading.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 shows a circuit diagram of a ZVT CLL resonant DC-DC converter of the present invention; the method comprises the following steps: the device comprises a direct current power supply (1), a full-bridge HF converter (2), a zero voltage conversion ZVT auxiliary circuit (3), a CLL resonant circuit (4), an isolation transformer (5), a diode rectifying circuit (6), an energy storage circuit (7) and a load (8);
the full-bridge HF converter includes four MOFET tubes S1、S2、S3、S4Each MOFET tube is connected with a absorption capacitor C in paralleln；
The ZVT auxiliary circuit is arranged between bridge arms of the HF converter, and the direct current input can be renewable energy source VsProviding, an auxiliary capacitance CzAnd MOFET tube SaParallel diode D1zAnd auxiliary inductor LzIs connected in series to S1、S4Middle, D2zAnd CzBy series connection with VsThe positive electrodes are connected;
the CLL resonant circuit is connected between two bridge arms of the HF converter and comprises a capacitor CsInductor LrAnd Lt(ii) a A two-winding high-frequency transformer is arranged between the capacitor energy storage circuit and the diode rectifier bridge; diode rectifier circuit output filter capacitor CfTo a resistive load RLSupplying power;
as shown in table 1, this example also provides parameters and models of main components of the CLL resonant DC-DC converter, and those skilled in the art can select the following components according to their own needs:
TABLE 1 parameters and model numbers of the main elements of the converter
Figure BDA0002276292220000041
Fig. 2 shows an equivalent circuit model of the DC-DC converter isolation transformer and a simplified process diagram thereof, and a circuit diagram of the CLL resonant converter with an output capacitor filter is shown in fig. 1. By following a network simplification technique, an equivalent circuit on the output terminal AB of the converter of fig. 1, called the primary side, can be obtained. In the first step, the HF transformer is represented by the T-equivalent, all parameters on the secondary side are called primary side, and the resulting circuit is shown in fig. 2 (a).
In FIG. 2(a), LlpIs primary leakage inductance, LlsIs secondary leakage inductance, LmIs the excitation inductance of the HF transformer. Series inductance LrAnd LlpAdd to form Lrlp(i.e., L)rlp＝Lr+Llp). The circuit is further simplified by using a triangle to star transform, with the resulting elements as shown in fig. 2 (b). The simplified elements of FIG. 2(b) are
Figure BDA0002276292220000053
The magnetizing inductance of the transformer is very large compared to the leakage inductance. In (1), LmOnly in the denominator, which will be LaTo a very small value. Series inductance L in FIG. 2(b)bAnd L'1sRepresents Ls(i.e., L)s＝Lb+L′1s) And a simplified equivalent circuit is given in fig. 2 (c). By equivalent alternating current resistance RacInstead of the load of fig. 2(c), a capacitive filter and a rectifier block, an equivalent phasor circuit is obtained as shown in fig. 2 (d).
Fig. 3 and 5 show typical operating waveforms and gating pattern diagrams of the CLL resonant DC-DC converter under minimum and large input voltages, and fig. 4 and 6 show equivalent circuits of the converter at each operating stage under CCM and DCM operating modes, respectively; wherein v isG1、vG2、vG3、vG4、vGaAre respectively a switch S1、S2、S3、S4、Sa(ii) a gate voltage of; v. ofABOutputting voltage to AB terminal of HF converter; vsIs a direct current input voltage; i.e. ir_in、is、iLpThe current is a diode rectification input current, a resonance loop current and a parallel inductor current; i.e. is1、is2、is3、is4Are respectively S1、S2、S3、S4Switching the current; α is a switch S2And S4The switching pulse of (1) is included; delta is input square wave voltage vABIs measured.
As can be seen from FIG. 3, the resonant tank current isLagging the output voltage v of the HF converterABAnd all switches (S) before the current per cycle becomes positive1-S4) The switching current of (a) is negative. This indicates that the anti-parallel diodes of the respective switches conduct before the switches conduct, resulting in ZVS conduction of the switches. For higher input voltages, the value of δ decreases significantly, so switch S4Loss of ZVS as shown in fig. 5 (a). Therefore, as shown in FIG. 5(b), in the direction S4By applying an auxiliary switch S before the gating signal is appliedaA short gating pulse activates the auxiliary circuit to pass itZVS is on. The power loss in the auxiliary switch is negligible because it carries very little current for a short time.
During one cycle, the converter may operate in Continuous Current Mode (CCM) or Discontinuous Current Mode (DCM). By observing the input current i of the rectifying circuitr_inAnd parallel inductor current iLpThe waveform identifies the CCM/DCM. If i r_in0 and iLpRemaining negative, the converter operates in DCM or CCM.
(1) CCM mode: the operating phases of a CLL resonant converter operating in CCM are shown in fig. 4. Equivalent circuit diagrams of each stage are shown in fig. 4(a) - (e). In CCM, all switches of the converter operate at ZVS when a minimum input voltage is applied;
1) stage I: t is t0<t<t1[ see FIG. 4(a)]The gating pulse being applied to the switch S1And S2At the previous stage (i.e. t)4<t<t5) Resonance/switching circuit isIs a sine wave, and switch S3And S4Will be eliminated. However, since the resonance current cannot be instantaneously changed, the anti-parallel diode D1And D2Is turned on and is isProvide the same path, the HF converter output voltage vABFrom zero up to + VsOutput rectifier diode Do1And Do2Conducting to supply power to a load;
at the end of phase I, i.e. t1A diode D1And D2Conducting in the reverse direction and taking some time to revert to its reverse voltage blocking mode; this transient behavior of the semiconductor switch is not depicted in fig. 3, since only the steady-state behavior is taken into account.
2) Stage II, t1<t<t2[ see FIG. 4(b)]Following switch S1And S2Conducting and diode D1And D2Stops conducting, the negative resonant current starts to increase and becomes positive, the switch S1And S2Before the switch is turned onTurn on to realize ZVS turn on and HF converter output voltage vABIs maintained at + VsRectifier diode Do1And Do2Continuing to conduct;
3) stage III: t is t2<t<t3[ see FIG. 4(c)]At this stage, switch S2Is removed to turn off, the inductor current must remain in the same direction, diode D3And S1And conducting. Output voltage v of HF converterABIs zero, and the energy stored by the energy storage circuit assembly passes through the rectifier diode Do1And Do2Providing;
4) stage IV: t is t3<t<t4[ see FIG. 4(d)]At this stage, D3Continues to be conducted, switch S1Stopping conducting; diode D4Starting to conduct, the HF converter outputs a voltage vABFrom zero to-VsRectifier diode Do3And Do4Starting to conduct;
5) and (5) stage V: t is t4<t<t5[ see FIG. 4(e)]The resonant current changes direction, switch S3And S4Is turned on due to the anti-parallel diode D of the two switches3And D4Conducting before this interval, so the switch is conducting through ZVS; rectifier diode Do3And Do4Continuing to conduct to supply power to the load;
(2) DCM: as the input voltage increases to a maximum, the output power can be regulated by a significant reduction in pulse width, which will result in a discontinuous current flow through a portion of the tank circuit (i.e., ir_in0) and i) areLpAlways maintaining an unchanged negative value, as shown in fig. 5. Up to phase III, the converter operation in DCM is the same as described in CCM. After phase III, current ir_inBecomes zero and the current becomes negative and equals iLpThis will be explained at the following stage.
1) Stage VI': t is t3＜t＜t′4[ see FIG. 6(a), (b)]Since the pulse width delta is significantly reduced, the gate control signal is applied to the switch S4Previously, the direction changed. The change of direction causing the switchS3And a diode D1Is conducted to make current iLpThe negative value is maintained and during this time interval the flywheel freewheels from the energy stored in the tank circuit element, continuing this free rotation until the energy in the resonant assembly is completely discharged, further resulting in DCM. Input current i of rectifier circuitr_inBecomes zero, Do3And Do4Stop conducting, the filter capacitor CfOnly the load will be powered;
2) stage VI': t'4＜t＜t″4[ see FIG. 6(c), (d)]Applying a strobe vGaSwitch on the auxiliary switch SaAnd switch S4Is connected in parallel with the diode D4Also starts to conduct, the HF converter outputs a voltage vABFrom zero to-VSRectifier diode Do3And Do4Power is delivered to the load. At the end of this interval, pair S4Applying a gate control signal to turn it on, antiparallel diode D4At S4Is turned on before being turned on to realize the switch S4Turn on to minimize its turn-on switching losses, and once V is entered, the auxiliary inductor LzThe small amount of energy stored in (c) is discharged and the cycle repeats.

Claims (10)

1. The utility model provides a zero voltage conversion CLL resonance DC-DC converter, includes full bridge type HF converter, CLL resonant circuit, isolation transformer, diode rectifier circuit, its characterized in that still includes:
a zero voltage conversion ZVT auxiliary circuit connected in parallel with the input end of the full-bridge HF converter for connecting a DC power supplyV s The positive and negative electrodes of (1); wherein, the zero voltage conversion ZVT auxiliary circuit passes through the diodeD z2The positive input end is connected to the full-bridge HF converter; the zero voltage conversion ZVT auxiliary circuit is also connected with a diode in seriesD z1Auxiliary inductorL z Connected to the output a of the full bridge HF converter.
2. The method of claim 1The CLL resonant circuit is bridged between two bridge arms of the full-bridge HF converter and is used as an output end of the full-bridge HF converter; the CLL resonant circuit is connected with the input end of the diode rectifying circuit through an isolation transformer; the output end of the diode rectifying circuit is connected with a filter capacitor in parallelC f As an output of the DC-DC converter; the output end of the DC-DC converter is used for connecting a resistance loadR L And is a resistive loadR L And (5) supplying power.
3. The DC-DC converter of claim 1, wherein the full bridge HF converter comprises a MOFET tubeS 1、S 4Series and shunt MOFET tubeS 2、S 3Two parallel bridge arms obtained by series connection, four MOFET tubesS 1、S 2、S 3、S 4Respectively connected in parallel with an absorption capacitorC n ，n=1,2,3,4。
4. The DC-DC converter according to claim 1, wherein the DC power source is a DC power sourceV s When the zero voltage conversion ZVT auxiliary circuit is connected into the DC-DC converter, the zero voltage conversion ZVT auxiliary circuit assists all the switching tubes to be switched on by ZVS, and can provide ZCS function for a rectifier diode at the secondary side of the HF transformer; when the direct current power supplyV s When connected to the DC-DC converter, the CLL resonant circuit can maintain the switching tube ZVS while inherently regulating the resonant current.
5. A control method of a zero voltage conversion CLL resonant DC-DC converter in CCM mode, characterized by using the DC-DC converter of any one of claims 1 to 4; the full-bridge HF converter comprises a switchS 1Switch, and electronic device using the sameS 2Switch, and electronic device using the sameS 3Switch, and electronic device using the sameS 4And a diodeD 1Diode, and method for manufacturing the sameD 2Diode, and method for manufacturing the sameD 3Diode, and method for manufacturing the sameD 4；
In a 2 pi period, the method comprises the following steps:
stage I: applying gated pulses to switchesS 1And switchS 2Cancellation switchS 3And switchS 4The gating signal of (2); diode with a high-voltage sourceD 1And diodeD 2Conducting;
and stage II: switch with a switch bodyS 1And switchS 2Conducting, diodeD 1And diodeD 2Turning off;
stage III: elimination switchS 2The gating signal of (2); switch with a switch bodyS 1And diodeD 3Conducting, switchingS 2Turning off;
stage IV: elimination switchS 1The gating signal of (2); diode with a high-voltage sourceD 3And diodeD 4Conducting, switchingS 1Turning off;
and (5) stage V: switch with a switch bodyS 3And switchS 4Conducting, diodeD 3And diodeD 4And (6) turning off.
6. The method as claimed in claim 5, wherein the total duration of the stages I and II is pi-αThe duration of stage III isαThe period of the phase IV isαThe duration of stage V isδ=π-α；αIs a switchS 2And switchS 4And switching the angle of the pulses, andS 1and switchS 3By increasing the width of the gating pulse by the same angleα；δIs the pulse width.
7. The method of claim 6, wherein all switches of the converter operate at ZVS when the minimum input voltage is applied.
8. Control of zero-voltage conversion CLL resonant DC-DC converter in DCM (discontinuous conduction mode)A method for manufacturing a DC-DC converter according to any one of claims 1 to 4; the full-bridge HF converter comprises a switchS 1Switch, and electronic device using the sameS 2Switch, and electronic device using the sameS 3Switch, and electronic device using the sameS 4And a diodeD 1Diode, and method for manufacturing the sameD 2Diode, and method for manufacturing the sameD 3Diode, and method for manufacturing the sameD 4(ii) a The zero-voltage conversion ZVT auxiliary circuit comprises an auxiliary switchS a ；
In a 2 pi period, the method comprises the following steps:
stage I: applying gated pulses to switchesS 1And switchS 2Cancellation switchS 3And switchS 4The gating signal of (2); diode with a high-voltage sourceD 1And diodeD 2Conducting;
and stage II: switch with a switch bodyS 1And switchS 2Conducting, diodeD 1And diodeD 2Turning off;
stage III: elimination switchS 2The gating signal of (2); switch with a switch bodyS 1And diodeD 3Conducting, switchingS 2Turning off;
stage VI': switch with a switch bodyS 3And diodeD 1Conducting, switchingS 1And diodeD 3Turning off;
stage VI': applying a strobe pulsev Ga To switch on the auxiliary switchS a (ii) a Switch with a switch bodyS 3Diode, and method for manufacturing the sameD 4Auxiliary switchS a Conducting, diodeD 1Turning off;
and (5) stage V: switch with a switch bodyS 3And switchS 4Conducting, diodeD 3Diode, and method for manufacturing the sameD 4Auxiliary switchS a And (6) turning off.
9. The method of claim 8, wherein stages i and ii are occupiedThe total duration ofαThe duration of stage III isαThe total duration of the stages VI 'and VI' isαThe duration of stage V isδ=π-α；αIs a switchS 2And switchS 4The switching pulses are angled and switchedS 1And switchS 3By increasing the width of the gating pulse by the same angleα；δIs the pulse width.
10. A control method of a zero voltage conversion CLL resonant DC-DC converter, characterized in that a DC-DC converter according to any of claims 1-4 is used; the full-bridge HF converter comprises a switchS 1Switch, and electronic device using the sameS 2Switch, and electronic device using the sameS 3Switch, and electronic device using the sameS 4And a diodeD 1Diode, and method for manufacturing the sameD 2Diode, and method for manufacturing the sameD 3Diode, and method for manufacturing the sameD 4(ii) a The zero-voltage conversion ZVT auxiliary circuit comprises an auxiliary switchS a ；
When the input voltage is increased, the pulse width can be reduced significantlyδAdjusting the output power; by observing the input current of the rectifying circuiti r_inAnd parallel inductor currenti LpThe waveform is used for identifying the CCM mode or the DCM mode for control.
CN201911124311.8A 2019-11-18 2019-11-18 Zero-voltage conversion CLL resonant DC-DC converter and control method thereof Pending CN110729906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911124311.8A CN110729906A (en) 2019-11-18 2019-11-18 Zero-voltage conversion CLL resonant DC-DC converter and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911124311.8A CN110729906A (en) 2019-11-18 2019-11-18 Zero-voltage conversion CLL resonant DC-DC converter and control method thereof

Publications (1)

Publication Number Publication Date
CN110729906A true CN110729906A (en) 2020-01-24

Family

ID=69224424

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911124311.8A Pending CN110729906A (en) 2019-11-18 2019-11-18 Zero-voltage conversion CLL resonant DC-DC converter and control method thereof

Country Status (1)

Country Link
CN (1) CN110729906A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111614256A (en) * 2020-04-29 2020-09-01 华为技术有限公司 Non-isolated DCDC resonance conversion control circuit and control method
CN112600434A (en) * 2020-12-04 2021-04-02 浙江大学 Multiplexing full-soft switch AC/DC input solid-state transformer circuit and modulation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
UDAY PATIL等: "Analysis and Design of a High-Frequency Isolated Full-Bridge ZVT CLL Resonant DC–DC Converter", 《IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111614256A (en) * 2020-04-29 2020-09-01 华为技术有限公司 Non-isolated DCDC resonance conversion control circuit and control method
CN112600434A (en) * 2020-12-04 2021-04-02 浙江大学 Multiplexing full-soft switch AC/DC input solid-state transformer circuit and modulation method thereof

Similar Documents

Publication Publication Date Title
WO2021077757A1 (en) Wide gain control method for variable topology llc resonant converter
CN108028605B (en) Converter with hold-up operation
CN108512431B (en) Double rectification alternating expression full-bridge single stage power factor correction power circuits and control method
WO2021103415A1 (en) High-gain quasi-resonance dc-dc converter based on voltage doubling rectifier circuit
CN108512421B (en) A kind of PFWM control method
CN102364860B (en) Secondary side phase-shifting controlled full-bridge converter
CN109067190B (en) LLC resonant converter of wide gain
CN110798073A (en) Wide voltage range output current feed converter
CN108390555A (en) PFWM control methods for the Boost Switching Power Supplies combined with bridge-type DC-DC conversion circuits
US20210273567A1 (en) Switch-mode power supplies including three-level llc circuits
CN114583967A (en) Isolated direct-current boost converter of two-phase parallel boost circuit and control method thereof
CN112436728A (en) High-efficiency control system and method of bidirectional resonant converter
CN110445387B (en) Topological structure and control method of formation and grading power supply
CN110729906A (en) Zero-voltage conversion CLL resonant DC-DC converter and control method thereof
CN109698627B (en) Full-bridge DC/DC converter based on switched capacitor and modulation strategy thereof
CN104065283B (en) No bridge type PFC AC DC supply convertors
CN210724569U (en) Zero-voltage conversion CLL resonance DC-DC converter
CN115811241B (en) Mixed control method for single-stage bridgeless staggered parallel Boost-LLC AC-DC converter
CN109818506B (en) Superconducting magnet switching power supply with energy feedback
CN110572039A (en) Novel full-bridge direct-current converter based on current-doubling rectifier
CN113452259B (en) Two-inductor current type converter and design method thereof
Chen et al. PWM and PFM hybrid modulation scheme for dual-input LLC resonant converter
Wen et al. The Hybrid Control Strategy for The Wide Input of The LLC Converter
Li et al. A Mixed Modulation Strategy for DC/DC Converter in Wide Input Voltage Range
TWI823250B (en) Bidirectional dc-dc energy converter with isolation

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200124