WO2024045797A1 - Convertisseur résonant non isolé - Google Patents

Convertisseur résonant non isolé Download PDF

Info

Publication number
WO2024045797A1
WO2024045797A1 PCT/CN2023/102031 CN2023102031W WO2024045797A1 WO 2024045797 A1 WO2024045797 A1 WO 2024045797A1 CN 2023102031 W CN2023102031 W CN 2023102031W WO 2024045797 A1 WO2024045797 A1 WO 2024045797A1
Authority
WO
WIPO (PCT)
Prior art keywords
resonant
inductor
transformer
unit
switch unit
Prior art date
Application number
PCT/CN2023/102031
Other languages
English (en)
Chinese (zh)
Inventor
李斌
李培永
李奇峰
杨鑫
周远平
乔宗标
Original Assignee
上海英联电子系统有限公司
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 上海英联电子系统有限公司 filed Critical 上海英联电子系统有限公司
Publication of WO2024045797A1 publication Critical patent/WO2024045797A1/fr

Links

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
    • H02M3/01—Resonant DC/DC 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • 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
    • H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • 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

Definitions

  • the present invention relates to the field of power supply technology, and in particular, to a non-isolated resonant converter.
  • the 48V bus is used to power server boards.
  • the power supply architecture gradually replaces the traditional architecture of the 12V bus; this 48V architecture usually converts the AC grid power into a 48V DC bus through the AC power supply, and then converts the 48V to 12V by the DCDC power supply, and then converts the 12V to what each chipset requires.
  • Various voltages as low as 0.6V are used to power the chipset.
  • Switchched Tank Converters STC
  • STC switched Energy storage converter non-isolated resonant converter
  • This converter is cascaded through a multi-stage resonant circuit, which can realize soft switching of all switching devices, and the stress of the switching devices is effectively controlled through the series connection of the switching devices and the output voltage clamping, so that the efficiency of the converter is at a lower level.
  • the cost has been very effectively improved, making this circuit a hot spot in the research field.
  • this circuit also has two inherent shortcomings: first, the converter is a resonant scheme of a switched capacitor circuit, the relationship between the input and output voltages is a fixed transformation ratio, and voltage regulation cannot be performed, which greatly limits the application of the converter, especially in After several leading companies successively shifted their server power supply solutions to 12V voltage controllable, the attention of this circuit began to decline; in addition, there are many switching devices and complex control. The series connection of multiple switching devices makes the driving scheme and auxiliary source design complex. Without In the case of a dedicated analog controller, the implementation and cost of the circuit are pushed up, which also limits the application of the circuit to a certain extent. between this Later, the buck converter circuit as shown in Figure 7 attracted attention again.
  • This circuit added a series capacitor to the traditional buck converter circuit. Due to the existence of this capacitor, the duty cycle of the converter can be expanded and the polarity can be increased. It greatly reduces the voltage ripple in front of the output filter inductor and improves the working conditions of the filter inductor, allowing the converter to lower the switching frequency, reduce switching losses, and improve efficiency. At the same time, the circuit structure of the converter is simpler than that of the STC circuit. , reducing the design difficulty. This circuit is a relatively optimized solution for current non-isolated 48V to 12V applications. The only drawback to this circuit is the hard switching. Since the switching device is in a hard switching condition during operation, it limits the increase in the switching frequency of the converter to a certain extent, which limits the module from further improving the power density of the power module.
  • the purpose of the present invention is to provide a non-isolated resonant converter to reduce control difficulty and cost.
  • the non-isolated resonant converter of the present invention includes a first resonant bridge, a second resonant bridge, a freewheeling tube unit, a resonant network, an autotransformer, a load and an output capacitor.
  • the autotransformer includes The first transformer inductor, the second transformer inductor and the third transformer inductor.
  • the resonant network and the first transformer inductor are connected in series to form a transformer resonant unit.
  • the first end of the transformer resonant unit is connected to the first resonant bridge.
  • the second end of the transformer resonant unit is connected to the second resonant bridge, the same-name end of the second transformer inductor is connected to the different-name end of the third transformer inductor, one end of the output capacitor, One end of the load is connected, the opposite end of the second transformer inductor is connected to the first resonant bridge and the freewheeling tube unit, the same end of the third transformer inductor is connected to the second resonant bridge and The freewheeling tube unit is connected, the first resonant bridge and the second resonant bridge are also connected to the positive electrode of the power supply, and the freewheeling tube unit is connected to the other end of the output capacitor and the other end of the load.
  • the first resonant bridge is used to connect the first end of the transformer resonant unit with the positive electrode of the power supply or the freewheeling tube
  • the second resonant bridge is used to connect the second end of the transformer resonant unit.
  • the freewheeling tube is used to connect the opposite end of the second transformer inductor or the same end of the third transformer inductor to the other end of the load, where , the number of turns of the first transformer inductor is greater than or equal to 0.
  • the beneficial effect of the non-isolated resonant converter is that it includes a first resonant bridge, a second resonant bridge, a freewheeling tube unit, a resonant network, an autotransformer, a load and an output capacitor.
  • the autotransformer includes a first transformer inductor. , the second transformer inductor and the third transformer inductor, the circuit is simple, the control is simple and easy, and the cost is low.
  • the first resonant bridge includes a first switch unit and a third switch unit, the first terminal of the first switch unit is connected to the positive pole of the power supply, and the second terminal of the first switch unit is connected to the third switch unit.
  • the first end of the three switch units is connected, and the second end of the third switch unit is connected to the opposite end of the second transformer inductor.
  • both the first switch unit and the third switch unit are controllable switching devices.
  • the second resonant bridge includes a second switching unit and a fourth switching unit, so The first end of the second switch unit is connected to the positive electrode of the power supply, the second end of the second switch unit is connected to the first end of the fourth switch unit, and the second end of the fourth switch unit is connected to the The same terminal of the third transformer inductor is connected.
  • both the second switch unit and the fourth switch unit are controllable switching devices.
  • the freewheeling tube unit includes a fifth switching unit and a sixth switching unit.
  • the first end of the fifth switching unit is connected to the opposite end of the second transformer inductor.
  • the fifth switching unit The second end of the sixth switching unit is connected to the other end of the load, the first end of the sixth switching unit is connected to the same end of the third transformer inductor, and the second end of the sixth switching unit is connected to the end of the load. Connect the other end.
  • both the fifth switching unit and the sixth switching unit are uncontrollable switching devices or controllable switching devices.
  • controllable switching device includes a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor, a gallium nitride transistor, a silicon carbide MOS transistor, and a first combined switching unit, and the first combined switching unit is a triode. combination with diodes.
  • the uncontrollable switching device includes a diode and a second combined switch unit
  • the second combined switch unit includes a diode and a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor, a gallium nitride transistor, and a silicon carbide Any combination of MOS tubes.
  • the resonant network includes a first resonant inductor and a resonant capacitor, and the first resonant inductor, the resonant capacitor and the first transformer inductor are connected in series.
  • the resonant network further includes a resistor, the resistor is connected to the first resonant circuit
  • the inductor, the resonant capacitor and the first transformer inductor are connected in series.
  • the autotransformer further includes a second resonant inductor.
  • the second resonant inductor When the number of turns of the first transformer inductor is greater than 0, the second resonant inductor is connected in parallel with the first transformer inductor.
  • the first transformer inductor has When the number of turns of the transformer inductor is equal to 0, the second resonant inductor is connected in parallel with the second transformer inductor.
  • the first transformer inductor when the number of turns of the first transformer inductor is greater than 0, the first transformer inductor includes at least one sub-transformer inductor, and the sub-transformer inductors are connected in series.
  • Figure 1 is a circuit schematic diagram of a non-isolated resonant converter in some embodiments of the present invention
  • Figure 2 is a schematic circuit diagram of a non-isolated resonant converter in some embodiments of the present invention
  • Figure 3 is a schematic circuit diagram of a non-isolated resonant converter in other embodiments of the present invention.
  • Figure 4 is a schematic circuit diagram of a non-isolated resonant converter in some embodiments of the present invention.
  • Figure 5 is a timing diagram of the non-isolated resonant converter shown in Figure 1 in some embodiments of the present invention
  • Figure 6 is a circuit schematic diagram of an STC non-isolated resonant converter in the prior art
  • FIG. 7 is a circuit schematic diagram of a buck conversion circuit in the prior art.
  • the non-isolated resonant converter 100 includes a first resonant bridge 101, a second resonant bridge 102, a freewheeling tube unit 103, a resonant network 104, an autotransformer 105, a load Ro and an output capacitor Co.
  • the coupling transformer 105 includes a first transformer inductor N1, a second transformer inductor N2 and a third transformer inductor N3, wherein the number of turns of the first transformer inductor N1 is greater than 0.
  • the resonant network and the first transformer inductor are connected in series to form a transformer resonant unit.
  • the first end of the transformer resonant unit is connected to the first resonant bridge, and the second end of the transformer resonant unit is connected to the first resonant bridge.
  • the end is connected to the second resonant bridge, the same-name end of the second transformer inductor is connected to the opposite-name end of the third transformer inductor, one end of the output capacitor, and one end of the load.
  • the second transformer inductor The opposite end of the inductor is connected to the first resonant bridge and the freewheeling tube unit, the same end of the third transformer inductor is connected to the second resonant bridge and the freewheeling tube unit, the first resonant The bridge and the second resonant bridge are also connected to the positive electrode of the power supply, and the freewheeling tube unit is connected to the other side of the output capacitor.
  • the first resonant bridge is used to connect the first end of the transformer resonant unit with the positive electrode of the power supply or the freewheeling tube
  • the second resonant bridge is used to connect The second end of the transformer resonant unit is connected to the positive electrode of the power supply or the freewheeling tube.
  • the freewheeling tube is used to connect the different-named end of the second transformer inductor or the same-named end of the third transformer inductor. The other end of the load is connected.
  • the first resonant bridge includes a first switch unit and a third switch unit, the first terminal of the first switch unit is connected to the positive pole of the power supply, and the second terminal of the first switch unit is connected to the The first end of the third switch unit is connected, and the second end of the third switch unit is connected to the opposite end of the second transformer inductor.
  • the second resonant bridge includes a second switch unit and a fourth switch unit, a first terminal of the second switch unit is connected to the positive pole of the power supply, and a second terminal of the second switch unit is connected to the The first end of the fourth switching unit is connected, and the second end of the fourth switching unit is connected to the same end of the third transformer inductor.
  • the freewheeling tube unit includes a fifth switch unit and a sixth switch unit.
  • the first end of the fifth switch unit is connected to the opposite end of the second transformer inductor.
  • the fifth switch The second end of the unit is connected to the other end of the load, the first end of the sixth switching unit is connected to the same end of the third transformer inductor, and the second end of the sixth switching unit is connected to the load. the other end of the connection. .
  • the first switch unit, the second switch unit, the third switch unit and the fourth switch unit are controllable switching devices
  • the fifth switch unit and the sixth switch unit are controllable switching devices.
  • the switching units are all uncontrollable switching devices or controllable switching devices.
  • the controllable switching device includes a metal oxide semiconductor field effect transistor, an insulated gate bipolar transistor, a gallium nitride transistor, a silicon carbide MOS transistor, and a first combined switch unit.
  • the first combined switch unit is a combination of a triode and a diode.
  • the uncontrollable switching device includes a diode and a second combined switch unit.
  • the second combined switch unit includes a diode and a metal oxide semi-field effect transistor, an insulated gate bipolar transistor, a gallium nitride transistor, or a silicon carbide MOS transistor. Any combination.
  • the first switching unit is a first NMOS transistor S1
  • the second switching unit is a second NMOS transistor S2
  • the third switching unit is a third NMOS transistor S3
  • the fourth switching unit is The fourth NMOS transistor S4
  • the fifth switching unit is the fifth NMOS transistor S5
  • the sixth switching unit is the sixth NMOS transistor S6.
  • the drain of the first NMOS transistor S1 is connected to the positive electrode of the power supply, the source of the first NMOS transistor S1 is connected to the drain of the third NMOS transistor S3, and the drain of the third NMOS transistor S3 is connected.
  • the source is connected to the opposite terminal of the second transformer inductor N2.
  • the drain of the second NMOS transistor S2 is connected to the positive electrode of the power supply, the source of the second NMOS transistor S2 is connected to the drain of the fourth NMOS transistor S4, and the drain of the fourth NMOS transistor S4 is connected.
  • the source is connected to the same terminal of the third transformer inductor N3.
  • the drain of the fifth NMOS transistor S5 is connected to the opposite end of the second transformer inductor N2, and the source of the fifth NMOS transistor S5 is connected to the other end of the load Ro and the output
  • the other end of the capacitor Co and the source of the sixth NMOS transistor S6 are connected to ground, and the drain of the sixth NMOS transistor S6 is connected to the same terminal of the third transformer inductor N3.
  • the gate of the first NMOS transistor is connected to the first control signal
  • the gate of the second NMOS transistor is connected to the second control signal
  • the gate of the third NMOS transistor is connected to the third control signal.
  • the gate of the fourth NMOS transistor is connected to the fourth control signal
  • the gate of the fifth NMOS transistor is connected to the fifth control signal
  • the gate of the sixth NMOS transistor is connected to the sixth control signal.
  • the resonant network includes a first resonant inductor and a resonant capacitor, and the first resonant inductor, the resonant capacitor and the first transformer inductor are connected in series.
  • the resonant network further includes a resistor, the resistor is connected in series with the first resonant inductor, the resonant capacitor, and the first transformer inductor.
  • the resonant network 104 includes a first resonant inductor Lr and a resonant capacitor Cr.
  • One end of the resonant capacitor Cr is connected to the source of the first NMOS transistor S1, and the other end of the resonant capacitor Cr is connected to the source of the first NMOS transistor S1.
  • One end of the first resonant inductor Lr is connected, the other end of the first resonant inductor Lr is connected to the same-name end of the first transformer inductor N1, and the opposite-name end of the first transformer inductor N1 is connected to the second NMOS
  • the source of tube S2 is connected.
  • the autotransformer further includes a second resonant inductor.
  • the second resonant inductor When the number of turns of the first transformer inductor is greater than 0, the second resonant inductor is connected in parallel with the first transformer inductor.
  • the second resonant inductor When the number of turns of a transformer inductor is equal to 0, the second resonant inductor is connected in parallel with the second transformer inductor.
  • the second resonant inductor is an independent inductor or a magnetizing inductor of the transformer.
  • the A transformer inductor when the number of turns of the first transformer inductor is greater than 0, the A transformer inductor includes at least one sub-transformer inductor, and the sub-transformer inductors are connected in series.
  • one end of the second resonant inductor Lm is connected to the same-name end of the first transformer inductor N1, and the other end of the second resonant inductor Lm is connected to the opposite-name end of the first transformer inductor N1.
  • FIG. 2 is a schematic circuit diagram of a non-isolated resonant converter in some embodiments of the present invention.
  • the difference between Figure 2 and Figure 1 is that the number of turns of the first transformer inductor N1 is equal to 0, that is, the other end of the first resonant inductor Lr is directly connected to the source of the second NMOS transistor S2, so The second resonant inductor Lm is connected in parallel with the second transformer inductor N2, that is, one end of the second resonant inductor Lm is connected to the opposite end of the second transformer inductor N2, and the other end of the second resonant inductor Lm Connect to the same end of the second transformer inductor N2.
  • FIG. 3 is a schematic circuit diagram of a non-isolated resonant converter in other embodiments of the present invention.
  • the difference between Figure 3 and Figure 1 is that both the fifth NMOS transistor S5 and the sixth NMOS transistor S6 are replaced with diodes.
  • FIG. 4 is a schematic circuit diagram of a non-isolated resonant converter in some embodiments of the present invention.
  • the difference between Figure 4 and Figure 2 is that both the fifth NMOS transistor S5 and the sixth NMOS transistor S6 are replaced with diodes.
  • FIG. 5 is a timing diagram of the non-isolated resonant converter shown in FIG. 1 in some embodiments of the present invention.
  • S 1 represents the first control signal
  • S 2 represents the second control signal
  • S 3 represents the third control signal
  • S 4 represents the fourth control signal
  • S 5 represents the fifth control signal
  • S 6 represents the sixth control signal
  • I Lr represents the current flowing through the first resonant inductor
  • I Lm represents the current flowing through the second resonant inductor
  • IN NS1 represents the current flowing through the first transformer inductor
  • V DS represents the current flowing through the first transformer inductor.
  • the first NMOS transistor S1, the fourth NMOS transistor S4 and the fifth NMOS transistor S5 are turned on, and the second NMOS transistor S2 and the third NMOS transistor S2 are turned on.
  • the transistor S3 and the sixth NMOS transistor S6 are turned off, and the turns ratio of the first transformer inductor Lr, the second transformer inductor N2 and the third transformer inductor N3 is n:1:1, n is greater than 0 , therefore, the voltage at both ends after the first resonant inductor Lr and the resonant capacitor Cr are connected in series is the resonant voltage, and the resonant voltage is equal to the difference between the power supply voltage V in and (n+2) times the output voltage Vo. Under the excitation of the resonant voltage, the current I Lr flowing through the first resonant inductor Lr rises according to the sinusoidal resonance and then decreases at resonance.
  • the current I Lm flowing through the second resonant inductor Lm is n times the output voltage Vo. Linearly increases under the action of One end flows into the first transformer inductor N1 through the same-name terminal of the first transformer inductor N1, and flows into the third transformer inductor N3 through the same-name terminal of the third transformer inductor N3.
  • the second transformer inductor N3 will induce (n+1) times the current flowing through the first transformer inductor N1, and flow out from the same terminal of the second transformer inductor N2 and flow into the output capacitor Co
  • One end of that is, the current flowing through the second transformer inductor N2 and the current flowing through the third transformer inductor N3 jointly charge the output capacitor Co, and the total current is (n+2) times flowing through the third transformer inductor N3.
  • the current of a transformer inductor N1 and the current flowing through the second resonant inductor N2 sum of currents.
  • the first NMOS transistor S1, the fourth NMOS transistor S4 and the fifth NMOS transistor S5 are turned off, and the first resonant inductor Lr and the resonant capacitor Cr are connected.
  • the direction of the current will not change suddenly.
  • the direction of the current on the first resonant inductor Lr is positive, which will charge the junction capacitance of the first NMOS transistor S1 and the junction capacitance of the fourth NMOS transistor S4.
  • the junction capacitance of the second NMOS transistor S2 and the junction capacitance of the third NMOS transistor S3 is discharged, and the current that charges the junction capacitance of the first NMOS transistor S1 and the fourth NMOS transistor S4 still flows in.
  • the current induced in the second transformer inductor N2 still flows from the same-name terminal of the third transformer inductor N3 through the different-name terminal. Therefore, although the fifth NMOS transistor S5 is turned off, the current still flows through the fifth NMOS transistor S5.
  • the body diode of the NMOS transistor S5, and the current flowing through the body diode of the fifth NMOS transistor S5 is (n+1) times the current flowing through the first transformer inductor N1, and the junction of the second NMOS transistor S2.
  • the current still flows into the second transformer N2 inductor from the opposite end of the second transformer inductor N2, and the current flowing through the second transformer inductor N2 is 2 times the difference between the current flowing through the first resonant inductor Lr and the current flowing through the second resonant inductor Lm.
  • the second NMOS transistor S2 and the third NMOS transistor S3 are 0 voltage conduction.
  • the body diode of the second NMOS transistor S2, the body diode of the third NMOS transistor S3, and the body diode of the fifth NMOS transistor S5 are conductive.
  • the resonant voltage at both ends is equal to the sum of the power supply voltage V in and n times the output voltage Vo.
  • the first resonant inductor Lr flows through and the current of the resonant capacitor Cr drops rapidly, and the current flowing into the first transformer inductor N1 is equal to the difference between the current flowing through the first resonant inductor Lr and the current flowing through the second resonant inductor Lm , when the current flowing through the first resonant inductor Lr is equal to the current flowing through the second resonant inductor Lm, the current flowing through the second transformer inductor N2 drops to 0, and at this time, the current flowing through the first resonant inductor Lm All the current of the resonant inductor Lr flows through the body diode of the fifth NMOS transistor S5, and the resonance state of the circuit remains unchanged.
  • the current flowing through the first resonant inductor Lr and the resonant capacitor Cr is at the resonant voltage.
  • the effect of The current part of the second resonant inductor Lm flows into the opposite terminal of the first transformer inductor N1, and the second transformer inductor N2 induces a current and flows out from the opposite terminal.
  • the second resonant inductor N2 The inductance value is relatively large. During this period, the current change on the second resonant inductor Lm is ignored.
  • the current on the first resonant inductor Lr decreases, the current flowing into the opposite end of the first transformer inductor N1 gradually increases. , the current induced by the second transformer inductor N2 gradually increases.
  • the current flowing through the third NMOS transistor S3 is the current flowing through the first resonant inductor Lr, and at the same time, the current flowing through the third resonant inductor Lr.
  • the sum of the current flowing through the body diode of the fifth NMOS transistor S5 and the current flowing through the second transformer inductor N2, as the current flowing through the second transformer inductor N2 gradually increases, the current flowing through the fifth NMOS transistor S5 The current gradually becomes smaller until time t2, when the current flowing through the fifth NMOS transistor S5 drops to 0, and the current flowing out of the opposite end of the second transformer inductor N2 is equal to the current flowing through the first resonant inductor Lr. , the fifth NMOS transistor S5 is turned off.
  • the fifth NMOS transistor S5 has just turned off, and the voltages across the source and drain of the fifth NMOS transistor S5 are 0. Therefore, the fifth NMOS transistor S5
  • the resonant voltage at both ends is equal to the sum of the power supply voltage V in and n times the output voltage Vo.
  • the first resonant inductor Lr and the resonant capacitor Cr flow through the first resonant inductor Lr and the resonant capacitor Cr.
  • the current of the resonant capacitor Cr decreases rapidly, the current flowing into the opposite terminal of the first transformer inductor N1 increases, the current flowing out of the opposite terminal of the second transformer inductor N2 increases accordingly, and the current flowing through the second transformer inductor N2
  • the junction capacitance of the fifth NMOS transistor S5 is greater than the current flowing through the first transformer inductor N1, and the current flowing through the second transformer inductor N2 is greater than the current flowing through the first transformer inductor N1. charge so that the source and drain of the fifth NMOS transistor S5 The voltage across the terminals increases.
  • the junction capacitance of the sixth NMOS transistor S6 begins to discharge, and the voltage across the source and drain of the sixth NMOS transistor S6 begins to decrease.
  • the first After the resonant inductor Lr and the resonant capacitor Cr are connected in series, the resonant voltage at both ends gradually decreases. Until time t3, the voltage at the source and drain of the sixth NMOS transistor S6 drops to 0. The body diode is turned on, clamping the voltage across the source and drain of the sixth NMOS transistor S6 at 0.
  • the resonant voltage at both ends of the first resonant inductor Lr and the resonant capacitor Cr gradually decreases until the resonant voltage at both ends of the first resonant inductor Lr and the resonant capacitor Cr is connected in series at time t3.
  • the sixth NMOS transistor S6 is clamped to the difference between the power supply voltage Vin and (n+2) times the output voltage Vo. At this time, the sixth NMOS transistor S6 is turned on at 0 voltage.
  • the resonant voltage at both ends after the first resonant inductor Lr and the resonant capacitor Cr are connected in series is between the power supply voltage V in and (n+2) times the output voltage Vo.
  • the output voltage Vo increases linearly under the action of the output voltage Vo.
  • the sine wave current on the first resonant inductor Lr flows through the second NMOS transistor S2, flows into the opposite terminal of the first transformer inductor N1, flows through the The third NMOS transistor S3 flows into the opposite end of the second transformer inductor N2 and outputs it to one end of the output capacitor Co. Since the current of the first transformer inductor N1 and the current of the second transformer inductor N2 are both determined by The opposite end flows in. According to the working principle of the autotransformer, the third transformer inductor N3 induces (n+1) times the electric current flowing through the first transformer inductor N1.
  • the output capacitor Co flows and flows out from the opposite terminal, and together with the current of the first transformer inductor N1 and the current of the second transformer inductor N2, flows into one end of the output capacitor Co, that is, the current flowing through the second transformer inductor N2 Together with the current flowing through the third transformer inductor N3, the output capacitor Co is charged.
  • the total current is (n+2) times the current flowing through the first transformer inductor N1 and the current flowing through the second resonance.
  • the switching frequency of the non-isolated resonant converter is higher than the resonant frequency of the first resonant inductor and the first two capacitors, or the switching frequency of the non-isolated resonant converter is lower than the first resonant capacitor.
  • the resonant frequency of the resonant inductor and the first and second capacitors, each switching unit adopts a controllable switching device or an uncontrollable switching device, and the working characteristic path changes slightly. Workers in the field can deduce the specific working mode, which will not be discussed here. Go into details.
  • the turn-on and turn-off of the first NMOS transistor, the second NMOS transistor, the third NMOS transistor and the fourth NMOS transistor cause the first resonant inductor and the resonant capacitor to It works in resonance with the second resonant inductor to form a resonant current.
  • the resonant current flows into the first transformer inductor and simultaneously flows into the second transformer inductor or the third transformer inductor, and flows into the third transformer where no current flows.
  • An induction film is formed in the inductor or the second transformer inductor, and through the freewheeling effect of the fifth NMOS tube or the sixth NMOS tube, the current flows from the same terminal of the second NMOS tube and the third NMOS tube.
  • the ends of the tubes with the same name flow out at the same time, so that the total current injected into one end of the output capacitor and one end of the load is proportionally distributed to the second transformer inductor and the third transformer inductor, reducing the current on the transformer inductor.
  • Valid values For example, the resonant current formed by the resonant operation of the first resonant inductor, the resonant capacitor and the second resonant inductor flows into the same-name terminal of the first transformer inductor. At this time, the current flows into the same-name terminal of the third transformer inductor.
  • a current is induced in the second transformer inductor and passes through the The current flowing out of the same terminal of the second transformer inductor and the sum of the resonant currents of the first resonant inductor, the resonant capacitor and the second resonant inductor flow into the output capacitor.
  • one end and one end of the load converting the input DC voltage into the output voltage.
  • the output voltage can be adjusted Adjustment; by adjusting the turns ratio of the autotransformer, the output voltage can be changed, thereby achieving non-isolation, input-output voltage conversion at high efficiency; utilizing the relationship between voltage and current in the autotransformer, the autotransformer current can be reduced The effective value of , improves the efficiency of the non-isolated resonant converter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

La présente invention concerne un convertisseur résonant non isolé. Le convertisseur résonant non isolé comprend un premier pont résonant, un second pont résonant, une unité de diode de roue libre, un réseau résonant, un autotransformateur, une charge et un condensateur de sortie, l'autotransformateur comprenant une première bobine d'induction de transformateur, une deuxième bobine d'induction de transformateur et une troisième bobine d'induction de transformateur. Par conséquent, un circuit simple, une commande simple et facile et un faible coût sont obtenus.
PCT/CN2023/102031 2022-08-30 2023-06-25 Convertisseur résonant non isolé WO2024045797A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211049380.9A CN115411929A (zh) 2022-08-30 2022-08-30 非隔离谐振变换器
CN202211049380.9 2022-08-30

Publications (1)

Publication Number Publication Date
WO2024045797A1 true WO2024045797A1 (fr) 2024-03-07

Family

ID=84162915

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/102031 WO2024045797A1 (fr) 2022-08-30 2023-06-25 Convertisseur résonant non isolé

Country Status (2)

Country Link
CN (1) CN115411929A (fr)
WO (1) WO2024045797A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115411929A (zh) * 2022-08-30 2022-11-29 上海英联电子系统有限公司 非隔离谐振变换器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007068284A (ja) * 2005-08-30 2007-03-15 Shindengen Electric Mfg Co Ltd 共振形コンバータ
US20120287678A1 (en) * 2011-05-11 2012-11-15 Fsp-Powerland Technology Inc. Non-isolated resonant converter
CN113783427A (zh) * 2021-09-24 2021-12-10 中南大学 一种可扩展的非隔离型高升压比谐振dc-dc变换器
WO2022155837A1 (fr) * 2021-01-21 2022-07-28 华为数字能源技术有限公司 Convertisseur ca/cc résonant, dispositif électronique et adaptateur
CN114938144A (zh) * 2022-06-08 2022-08-23 上海英联电子系统有限公司 一种非隔离llc谐振变换器电路
CN115411929A (zh) * 2022-08-30 2022-11-29 上海英联电子系统有限公司 非隔离谐振变换器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007068284A (ja) * 2005-08-30 2007-03-15 Shindengen Electric Mfg Co Ltd 共振形コンバータ
US20120287678A1 (en) * 2011-05-11 2012-11-15 Fsp-Powerland Technology Inc. Non-isolated resonant converter
WO2022155837A1 (fr) * 2021-01-21 2022-07-28 华为数字能源技术有限公司 Convertisseur ca/cc résonant, dispositif électronique et adaptateur
CN113783427A (zh) * 2021-09-24 2021-12-10 中南大学 一种可扩展的非隔离型高升压比谐振dc-dc变换器
CN114938144A (zh) * 2022-06-08 2022-08-23 上海英联电子系统有限公司 一种非隔离llc谐振变换器电路
CN115411929A (zh) * 2022-08-30 2022-11-29 上海英联电子系统有限公司 非隔离谐振变换器

Also Published As

Publication number Publication date
CN115411929A (zh) 2022-11-29

Similar Documents

Publication Publication Date Title
CN106208698B (zh) 设有软开关的四开关Buck-Boost变换器电路及其控制方法
CN114629349B (zh) 基于开关电感的改进型高频高升压比sepic变换器
Wu et al. Active‐clamped ZVS current‐fed push–pull isolated dc/dc converter for renewable energy conversion applications
WO2024045797A1 (fr) Convertisseur résonant non isolé
Nayanasiri et al. A switching control strategy for single-and dual-inductor current-fed push–pull converters
WO2021031792A1 (fr) Circuit de résonance tlc et convertisseur de puissance l'appliquant
WO2024045798A1 (fr) Convertisseur résonant llc non isolé
Hua et al. Zero‐voltage‐transition bridgeless power factor correction rectifier with soft‐switched auxiliary circuit
WO2024027360A1 (fr) Circuit convertisseur en cascade en pont complet non isolé et son procédé de commande
CN117439406B (zh) 一种高转换比的三电流路径混合降压变换器
TWI663816B (zh) 交錯式高升壓直流－直流轉換器
TWI530074B (zh) 具功因修正之轉換器電路
CN105978322B (zh) 一种开关电容型高增益准z源dc-dc变换器
TW202207598A (zh) 高電壓增益轉換器
Li et al. An efficiency-oriented two-stage structure employing partial power regulation
TWI501527B (zh) 單輔助開關之交錯式高升壓比柔切式轉換器
CN112564477A (zh) 一种具有强降压能力的转换电路
TW202046612A (zh) 高升壓轉換器
CN219643800U (zh) Dc-dc变换器
Wang et al. Zero-current transition interleaved boost dc/dc converter
CN114501727B (zh) 一种buck电感串联检测控制电路
CN115296540B (zh) 一种隔离型混合降压变换器
CN111769754B (zh) 一种辅助回路最低损耗的无桥双升软开关整流器
CN219802159U (zh) Dc-dc变换器及dc-dc变换装置
WO2023010733A1 (fr) Circuit de commutation douce, ensemble carte de circuit imprimé et alimentation électrique à commutation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23858836

Country of ref document: EP

Kind code of ref document: A1