Nothing Special   »   [go: up one dir, main page]

CN113691124A - Zero-voltage turn-off zero-current turn-on high-gain Cuk converter - Google Patents

Zero-voltage turn-off zero-current turn-on high-gain Cuk converter Download PDF

Info

Publication number
CN113691124A
CN113691124A CN202110970810.XA CN202110970810A CN113691124A CN 113691124 A CN113691124 A CN 113691124A CN 202110970810 A CN202110970810 A CN 202110970810A CN 113691124 A CN113691124 A CN 113691124A
Authority
CN
China
Prior art keywords
inductor
current
zero
mode
port
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.)
Granted
Application number
CN202110970810.XA
Other languages
Chinese (zh)
Other versions
CN113691124B (en
Inventor
邾玢鑫
蓝海
赵宇辉
支树播
杨楠
李振华
王凯宏
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.)
China Three Gorges University CTGU
Original Assignee
China Three Gorges University CTGU
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 China Three Gorges University CTGU filed Critical China Three Gorges University CTGU
Priority to CN202110970810.XA priority Critical patent/CN113691124B/en
Publication of CN113691124A publication Critical patent/CN113691124A/en
Application granted granted Critical
Publication of CN113691124B publication Critical patent/CN113691124B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • 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
    • H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
    • 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
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • 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
    • H02M3/005—Conversion of dc power input into dc power output using Cuk converters
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A zero-voltage cut-off zero-current turn-on high-gain Cuk converter comprises a main circuit and an auxiliary circuit; the main circuit comprises a Cuk transducer, at least one garment unit. The Cuk converter comprises two inductors L1, L2, a power switch S1, a diode D1 and two capacitors C1, C2. The auxiliary circuit comprises a zero current inductor Lr, an auxiliary inductor Ls, a zero voltage capacitor Cs, diodes D2, D3 and D4. The converter realizes zero voltage turn-off and zero current conduction of the power switch tube, eliminates the switching loss on the power switch tube S1, realizes the purpose of soft switching without loss, and can improve the efficiency of the converter.

Description

Zero-voltage turn-off zero-current turn-on high-gain Cuk converter
Technical Field
The invention relates to a direct current-direct current converter, in particular to a zero-voltage turn-off zero-current turn-on high-gain Cuk converter.
Background
In the existing switching power supply technology, the Cuk coat circuit well realizes high voltage gain, but in a high-gain DC/DC converter, in order to reduce the cost of the converter and improve the power density of the converter, the working frequency of a switching tube of the converter needs to be increased, but at present, the realization of high-frequency operation of the converter is still difficult. The main reason is that as the operating frequency of the converter is increased, the switching loss of the switching tube is correspondingly increased, which further reduces the operating efficiency of the converter and increases the heat productivity. In addition, the heat sink volume and weight also increase. The increase in switching frequency mainly causes the following two problems:
(1) the problem of switching losses: in the switching process of the power switch tube, the voltage and the current of the power switch tube are not zero, and an overlapping area appears, and the area is the switching loss of the power switch tube. The switching loss and the switching frequency have a linear relation, and the switching loss can be obviously increased after the switching frequency is increased.
(2) Emi (electromagnetic interference) electromagnetic interference effects: when the converter operates at high frequency, the voltage and current change faster, the waveform will overshoot significantly, the switching tubes will have to produce higher du/dt and di/dt, which will have an impact on the power supply itself and surrounding electronics, and switching noise, and EMI problems will become more severe after further increase of the switching frequency.
Aiming at the problems of the existing high-gain DC/DC converter, the soft switching technology is adopted, so that the switching loss can be reduced to zero theoretically, and meanwhile, the interference of EMI problems to electronic devices can be reduced.
Disclosure of Invention
The invention provides a zero-voltage off zero-current on high-gain Cuk converter, which enables the switching loss of a power switching tube to transfer energy back to a main circuit when the working condition of the power switching tube is changed through an auxiliary circuit, and reduces the switching loss on the power switching tube in the circuit.
The technical scheme adopted by the invention is as follows:
a zero-voltage cut-off zero-current turn-on high-gain Cuk converter comprises a main circuit and an auxiliary circuit;
the main circuit comprises a Cuk transducer and at least one coat unit;
the Cuk converter comprises an inductor L1, a power switch tube S1, a capacitor C1, a diode D1, an inductor L2 and a capacitor C2;
one end of an inductor L1 is connected with the anode of an input power supply, the other end of the inductor L1 is respectively connected with the drain of a power switch tube S1 and one end of a capacitor C1, and the source of the power switch tube S1 is connected with the cathode of the input power supply; the other end of the inductor L2 is connected with one end of a capacitor C2; the other end of the capacitor C2 is respectively connected with the cathode of the diode D1, the drain of the power switch tube S1 and the cathode of the input power supply;
said garment unit comprising a capacitor Cn1, a capacitor Cn2, an inductance Ln1, a diode Dn1, n being a natural number and n being equal to or greater than 1, the garment unit comprising five ports: port I, port II, port III, port IV and port V;
one end of the capacitor Cn1 is a port I, the other end of the capacitor Cn1 is respectively connected with the anode of the diode Dn1 and one end of the inductor Ln1, and the cathode of the diode Dn1 is the port II; the other end of the inductor Ln1 is connected with one end of a capacitor Cn2, and the other end of the capacitor Cn2 is a port c; the anode of the diode Dn1 is a port (r), and the other end of the inductor Ln1 is a port (c);
the port I is respectively connected to one end of an inductor L2 and the anode of a diode D1 in the Cuk converter, the port II is respectively connected to the other end of an inductor L2 and one end of a capacitor C2 in the Cuk converter, and the port III is connected to the cathode of an input power supply;
the auxiliary circuit comprises a zero current inductor Lr, an auxiliary inductor Ls, a zero voltage capacitor Cs, diodes D2, D3 and D4;
one end of a zero current inductor Lr is connected with the anode of a diode D4 and the other end of a capacitor C1 in the Cuk converter;
the other end of the zero-current inductor Lr is respectively connected with one end of a capacitor C11 in the first coat unit, one end of an inductor L2 in the Cuk converter and the anode of a diode D1;
the cathode of the diode D2 is respectively connected with the anode of the input power supply and one end of the inductor L1;
the anode of the diode D2 is respectively connected with one end of the auxiliary capacitor Cs and the cathode of the diode D3;
the anode of the diode D3 is connected with one end of the auxiliary inductor Ls;
the other end of the auxiliary inductor Ls is connected with the negative electrode of the input power supply and the source electrode of the power switch tube S1 respectively;
the cathode of the diode D4 is connected with the cathode of the input power supply;
the other end of the zero-voltage capacitor Cs is connected with the source electrode of the power switch tube S1, one end of the capacitor C1 and the other end of the main inductor L1 respectively.
Of the n garment units, the garment unit,
the port (r) of the second garment unit is connected to the port (r) in the first garment unit,
the port of the second garment unit is connected to the port of the first time garment unit,
the port of the second coat unit is connected to the negative pole of the input power supply;
the port (r) of the third garment unit is connected to the port (r) in the second garment unit,
the port of the third garment unit is connected to the port in the second garment unit,
the port of the third coat unit is connected to the negative pole of the input power supply;
.... and so on;
the port (r) of the nth garment unit is connected to the port (r) in the (n-1) th garment unit,
the port of the nth garment unit is connected to the port of the (n-1) th garment unit,
the port of the nth coat unit is connected to the negative pole of the input power supply.
The grid electrode of the power switch tube S1 is connected with the controller.
The invention discloses a zero-voltage cut-off zero-current turn-on high-gain Cuk converter, which has the following technical effects:
1) when the power switch tube S1 is turned on, the power switch tube S1 is turned on under the condition of zero current due to the action of the zero-current inductor Lr, and the turn-on loss of the power switch tube S1 is eliminated.
2) When the power switch tube S1 is turned off, the power switch tube S1 is turned off under the condition of zero voltage due to the effect of the zero-voltage capacitor Cs, so that the turn-off loss of the power switch tube S1 is eliminated.
3) The invention adopts the passive lossless soft switching technology to realize soft switching for the power switch tube S1 in the main circuit. The switching losses in the circuit at the power switch S1 are reduced by the action of the auxiliary circuit during the entire switching cycle of the power switch S1.
Drawings
Fig. 1 is a schematic overview of a converter according to the invention.
Figure 2 is a schematic diagram of a transducer of the present invention comprising two garment units.
Figure 3 is a schematic diagram of a transducer circuit mode one incorporating two garment units of the present invention;
figure 4 is a schematic diagram of a transducer circuit mode two incorporating two garment units of the present invention;
figure 5 is a schematic diagram of a transducer circuit mode three incorporating two garment units of the present invention;
figure 6 is a schematic diagram of a transducer circuit mode four of the present invention incorporating two garment units;
figure 7 is a schematic diagram of a transducer circuit mode five of the present invention incorporating two garment units;
figure 8 is a schematic diagram of a transducer circuit mode six of the present invention incorporating two garment units;
figure 9 is a schematic diagram of a transducer circuit mode seven of the present invention incorporating two garment units;
figure 10 is a schematic diagram of a transducer circuit mode eight incorporating two garment units of the present invention;
figure 11 is a schematic diagram of a transducer circuit mode nine of the present invention incorporating two garment units;
figure 12 is a schematic diagram of a transducer circuit mode ten incorporating two garment units of the present invention;
figure 13 is a block diagram of a garment unit of the invention;
figure 14 is a schematic diagram of a garment unit of the present invention where n is 1.
Fig. 15 is a simulated waveform diagram of the driving control signal, the input power source Uin, and the output voltage Uo of the power switch tube S1.
Fig. 16(1) Is a simulated waveform diagram (zero current conduction) of the driving of the power switch tube S1, the current Is on the switch tube, and the voltage Us on the switch tube;
fig. 16(2) Is a simulated waveform diagram (zero voltage turn-off) of the driving of the power switch tube S1, the current Is on the switch tube, and the voltage Us on the switch tube.
Detailed Description
As shown in fig. 1, a zero-voltage turn-off zero-current turn-on high-gain Cuk converter comprises a main circuit, an auxiliary circuit, at least one coat unit;
conventional Cuk converters:
the Cuk converter comprises an inductor L1, a power switch tube S1, a capacitor C1, a diode D1, an inductor L2 and a capacitor C2;
one end of an inductor L1 is connected with the anode of an input power supply, the other end of the inductor L1 is respectively connected with the drain of a power switch tube S1 and one end of a capacitor C1, and the source of the power switch tube S1 is connected with the cathode of the input power supply; the other end of the capacitor C1 is connected with the anode of the diode D1 and one end of the inductor L2, and the other end of the inductor L2 is connected with one end of the capacitor C2; the other end of the capacitor C2 is respectively connected with the cathode of the diode D1, the drain of the power switch tube S1 and the cathode of the input power supply;
a garment unit:
said garment unit comprising a capacitor Cn1, a capacitor Cn2, an inductance Ln1, a diode Dn1, n being a natural number and n being equal to or greater than 1, the garment unit comprising five ports: port I, port II, port III, port IV and port V;
one end of a capacitor Cn1 is connected with a port I, the other end of the capacitor Cn1 is respectively connected with the anode of a diode Dn1 and one end of an inductor Ln1, the cathode of the diode Dn1 is connected with the port II, the other end of the inductor Ln1 is connected with one end of a capacitor Cn2, and the other end of the capacitor Cn2 is connected with the port III; the anode of the diode Dn1 is a port (r), and the other end of the inductor Ln1 is a port (c);
an auxiliary circuit:
the auxiliary circuit comprises a zero current inductor Lr, an auxiliary inductor Ls, a zero voltage capacitor Cs, diodes D2, D3 and D4;
one end of a zero current inductor Lr is connected with the anode of a diode D4 and the other end of a capacitor C1 in the Cuk converter;
the other end of the zero-current inductor Lr is connected to one end of a capacitor C11 in the garment unit, one end of an inductor L2 in the Cuk converter and the anode of a diode D1 when n is 1;
the cathode of the diode D2 is respectively connected with the anode of the input power supply and one end of the inductor L1;
the anode of the diode D2 is respectively connected with one end of the auxiliary capacitor Cs and the cathode of the diode D3;
the anode of the diode D3 is connected with one end of the auxiliary inductor Ls;
the other end of the auxiliary inductor Ls is connected with the negative electrode of the input power supply and the source electrode of the power switch tube S1 respectively;
the cathode of the diode D4 is connected with the cathode of the input power supply;
the other end of the zero-voltage capacitor Cs is connected with the source electrode of the power switch tube S1, one end of the capacitor C1 and the other end of the main inductor L1 respectively.
Relationship between conventional Cuk transducer and garment unit:
the port I is respectively connected to one end of an inductor L2 and the anode of a diode D1 in the Cuk converter, the port II is respectively connected to the other end of an inductor L2 and one end of a capacitor C2 in the Cuk converter, and the port III is connected to the cathode of an input power supply;
the connection between the garment units:
of the n garment units, the garment unit,
the port of the garment unit when n-2 is connected to the port of the garment unit when n-1,
the port of the garment unit when n is 2 is connected to the port of the garment unit when n is 1,
when n is 2, the port of the coat unit is connected to the negative pole of the input power supply;
the port of the garment unit when n-3 is connected to the port of the garment unit when n-2,
the port of the garment unit when n is 3 is connected to the port of the garment unit when n is 2,
when n is 3, the port of the coat unit is connected to the negative pole of the input power supply;
relationship between conventional Cuk converter and auxiliary circuit:
a diode D2 in the auxiliary circuit is respectively connected with one end of an inductor L1 in the Cuk converter and the anode of an input power supply, a capacitor Cs is respectively connected with a capacitor C1 in the Cuk converter and the drain of a power switch tube S1, the intersection point of the left end of a zero-current inductor Lr in the auxiliary circuit and the anode of a diode D4 is connected with the right end of a capacitor C1 in the Cuk converter, the right end of the zero-current inductor Lr in the auxiliary circuit is connected with the left end of an inductor L2, and the cathode of the diode D4 is respectively connected with the lower end of the capacitor C2, the lower end of the inductor Ls and the cathode of the input power supply.
Example (b):
as shown in FIG. 2, two garment units are included as an example:
a zero-voltage turn-off zero-current turn-on high-gain Cuk converter comprises a traditional Cuk converter, two coat units and an auxiliary circuit. The conventional Cuk converter includes two inductors L1 and L1, a power switch S1, a diode D1, and two capacitors C1 and C2. The first garment unit comprises an inductor L11, two capacitors C11, C12 and a diode D11. The second garment unit comprises an inductor L21, two capacitors C21, C22 and a diode D21. The auxiliary circuit part comprises a zero current inductor Lr, an auxiliary inductor Ls, a zero voltage capacitor Cs and three diodes D2, D3 and D4. The circuit connection relationship is as follows:
one end of an inductor L1 of a traditional Boost converter is connected with the anode of an input power supply, the other end of the inductor L1 is respectively connected with the drain of a power switch tube S1 and one end of a capacitor C1, the source of the power switch tube S1 is connected with the cathode of the input power supply, the other end of the capacitor C1 is connected with the anode of a diode D1 and one end of an inductor L2, the other end of the inductor L2 is connected with one end of a capacitor C2, and the other end of the capacitor C2 is respectively connected with the cathode of a diode D1, the drain of the power switch tube S1 and the cathode of the input power supply;
the garment cell is a five-port cell consisting of two capacitors C11 and C12, an inductor L11 and a diode D11, as shown in figure 14. The left end of the capacitor C11 is connected to the port (r), and the right end is connected to one end of the inductor L11 and the anode of the diode D11. The other end of the inductor L11 is connected to port c. The other end of the inductor L11 is connected to the upper end of a second capacitor C12. The lower end of the capacitor C12 is connected to port C. The cathode of the diode D11 is the port (r) and the anode is the port (r). The port (i) of the first garment unit is connected to one end of an inductor L2 in the Boost converter, the port (ii) is connected to the other end of an inductor L2, and the port (iii) is connected to the negative electrode of an input power supply. The port of the second garment unit (i) is connected to the anode of the diode in the first garment unit (ii) to the other end of the inductor L11 in the first garment unit (iii) and (iii) to the negative terminal of the input power source. The connection of the third garment unit is identical to the connection of the second garment unit.
In the auxiliary circuit section: one end of a zero-current inductor Lr is connected with one end of a capacitor C11 in the coat unit when n is 1, one end of an inductor L2 in the Cuk converter and the anode of a diode D1 respectively; the other end of the zero current inductor Lr is connected with the other end of a capacitor C1 in the Cuk converter and the anode of a diode D4; the cathode of the diode D4 is connected with the cathode of the input power supply; the anode of the diode D2 is respectively connected with one end of the auxiliary capacitor Cs and the cathode of the diode D3; the cathode of the diode D2 is respectively connected with the anode of the input power supply and one end of the inductor L1; the anode of the diode D3 is connected with one end of the auxiliary inductor Ls; the other end of the auxiliary inductor Ls is connected with the negative electrode of the input power supply and the source electrode of the power switch tube S1 respectively; the other end of the zero-voltage capacitor Cs is connected with the source electrode of the power switch tube S1, one end of the capacitor C1 and the other end of the main inductor L1 respectively.
Relationship between conventional Cuk transducer and garment unit:
the port I is respectively connected to one end of an inductor L2 and the anode of a diode D1 in the Cuk converter, the port II is respectively connected to the other end of an inductor L2 and one end of a capacitor C2 in the Cuk converter, and the port III is connected to the cathode of an input power supply;
the connection between the garment units:
the port of the garment unit when n-2 is connected to the port of the garment unit when n-1,
the port of the garment unit when n is 2 is connected to the port of the garment unit when n is 1,
when n is 2, the port of the coat unit is connected to the negative pole of the input power supply;
relationship between conventional Cuk converter and auxiliary circuit:
a diode D2 in the auxiliary circuit is respectively connected with one end of an inductor L1 in the Cuk converter and the anode of an input power supply, a capacitor Cs is respectively connected with a capacitor C1 in the Cuk converter and the drain of a power switch tube S1, the intersection point of the left end of a zero-current inductor Lr in the auxiliary circuit and the anode of a diode D4 is connected with the right end of a capacitor C1 in the Cuk converter, the right end of the zero-current inductor Lr in the auxiliary circuit is connected with the left end of an inductor L2, and the cathode of the diode D4 is respectively connected with the lower end of the capacitor C2, the lower end of the inductor Ls and the cathode of the input power supply.
According to the difference between the conduction conditions of the power switch tube S1 and the diode, the working process of the circuit can be divided into 10 working modes, which are as follows:
the first mode is as follows:
at the beginning of this mode, the main switch S1 is turned on under ZCS conditions because the magnitude and direction of the current in the zero current inductor Lr and inductor L1 cannot change abruptly. In this mode, the diodes D1, D3, D11, and D21 are turned on, the inductors L1, L11, and L21 are discharged, the auxiliary inductor Ls is charged, the capacitors C1, C11, and C21 are charged, and the capacitors Cs, C2, C12, and C22 are discharged. When the diode D3 is turned on, resonance between the auxiliary inductor Ls and the zero-voltage capacitor Cs begins. Therefore, the Cs voltage falls sinusoidally, and the Ls current rises sinusoidally. This mode ends when the zero current inductance Lr decreases linearly to zero.
Mode two:
in this mode, the diodes D1, D11, and D21 are turned off, and the inductor L1 and the zero-current inductor Lr in the main circuit start charging, and the current linearly increases. The capacitors C1, C11 and C21 start to discharge, the capacitors C2, C12 and C22 are charged, and the currents of the inductors L11, Lr and L21 increase linearly. The resonance between the auxiliary inductor Ls and the zero-voltage capacitor Cs continues, and when the voltage across the zero-voltage capacitor Cs in the auxiliary circuit reaches the negative input voltage-Vin, the diode D2 begins to conduct under ZVS condition, the Cs voltage is clamped at this level, and the mode ends.
Mode three:
in the third mode, since the inductor Ls resonates with the zero-voltage capacitor Cs, energy is stored when a current flows through the inductor Ls. When the voltage on Cs reaches the negative input voltage-Vin, inductor Ls freewheels energy back to the input power source through diode D2. The working state of the components in the main circuit is the same as the previous mode. This mode ends when the inductor Ls current drops to zero and the diode D2 turns off.
And a fourth mode:
in this mode, the auxiliary circuit stops operating. The working state of the components in the main circuit is the same as that of the previous mode, and the load is continuously supplied with power by the C22. This mode ends when the power switch S1 is off.
A fifth mode:
in mode five, the power switch tube S1 is turned off at ZVS due to the presence of the zero voltage Cs. In this mode, the operation state of the components in the main circuit is the same as that of the previous mode, and the load is continuously supplied with power by the C22. The inductor L1 current discharges Cs linearly, and when VCs reaches zero, the inductor L1 current charges Cs linearly. When VCs reaches Vc1-Vin, diode D4 begins to conduct under ZVS conditions, the Cs voltage is clamped at this level, and the mode ends.
A sixth mode:
when diode D21 turns on, mode six begins, diode D4 begins to turn on under ZVS condition, and the current of inductor L1 passes through C1, D4, and uin. The inductor current of L2 flows through Lr, D4, and C2. The inductor current of L11 flows through C11, Lr, D4 and C12. The inductor current of L21 is split into two paths, first flowing through C21, C11, Lr, D4 and the output stage (C22// RL), and then flowing through D21, C12 and the output stage (C22// RL). C1, C2, C12, C22 charged, C11, C21 discharged, and all inductor currents dropped. This mode ends when the capacitance C21 current drops to zero.
A seventh mode:
when the capacitor C21 current drops to zero, mode seven begins, in which the capacitor C21 current increases in reverse and the inductor current of L11 flows through C21, D21. The inductor current of L21 flows through D21, C12 and the output stage (C22// RL). The current state of the rest inductors is the same as the previous mode, C1, C2, C12, C21 and C22 are charged, C11 is discharged, and all inductor currents are reduced. This mode ends when the capacitance C11 current drops to zero.
The mode is eight:
when the current of the capacitor C11 decreases to zero, mode eight begins, in which the current of the capacitor C11 increases in a reverse direction, and the inductor current of L2 splits into two paths, first flowing through C11, C21, D21, C12, and then flowing through Lr, D4, and C2. The current state of the rest inductors is the same as the previous mode, C1, C1, C11, C12, C21 and C22 are charged, C12 is discharged, and all inductor currents are reduced. This mode ends when the inductor Lr current decreases to zero.
The mode is nine:
when the inductor Lr current decreases to zero, the mode nine begins, in which the inductor Lr current increases in the reverse direction and the inductor current of L2 flows through C11, C21, D21, and C12. The current state of the rest inductors is the same as that of the previous mode, C1, C1, C12, C21 and C22 are charged, C11 is discharged, and the current of all the rest inductors is reduced. When the inductor Lr current increases in the reverse direction to the input inductor current, D4 zero current turns off and the mode ends.
And a modality of ten:
when D4 is turned off with zero current and D1, D11 are turned on, mode ten begins. The inductive current of L1 is divided into three paths; first through C1, D1 and uin, then through C1, C11, D11, C2 and uin, and finally through C1, C11, C21, D21, C12 and uin. The inductor current of L2 flows through D1 and C2, the inductor current of L11 flows through D11, C2 and C12, and the inductor current of L21 flows through D21, C12 and the output stage (C22// RL). C1, C11, C21 charge, C2, C12, C22 discharge, and all inductor currents drop.
Simulation parameters:
switching frequency f is 50k, and input power supply UinIs 48V, and outputs a voltage UoThe duty ratio of the power switch tube S1 is 0.735 and the rated power Po is 300W at 400V.
Fig. 15 is a simulated waveform diagram of the driving control signal, the input power source Uin, and the output voltage Uo of the power switch tube S1. It can be seen that the above circuit achieves the high gain requirements required by the design.
Fig. 16(1), 16(2) are simulated waveforms of the driving of the power switch tube S1, the current Is on the switch tube, and the voltage Us on the power switch tube S1. It can be seen from the simulation waveform that the auxiliary circuit realizes the functions of zero current conduction and zero voltage turn-off of the power switch tube.
The invention realizes zero voltage turn-off and zero current turn-on of the power switch tube, eliminates the switching loss on the power switch tube S1 and realizes the purpose of soft switching without loss. Thereby improving the efficiency of the converter.

Claims (5)

1. A zero-voltage cut-off zero-current turn-on high-gain Cuk converter is characterized by comprising a main circuit and an auxiliary circuit;
the main circuit comprises a Cuk transducer and at least one coat unit;
the Cuk converter comprises an inductor L1, a power switch tube S1, a capacitor C1, a diode D1, an inductor L2 and a capacitor C2;
one end of an inductor L1 is connected with the anode of an input power supply, the other end of the inductor L1 is respectively connected with the drain of a power switch tube S1 and one end of a capacitor C1, and the source of the power switch tube S1 is connected with the cathode of the input power supply; the other end of the inductor L2 is connected with one end of a capacitor C2; the other end of the capacitor C2 is respectively connected with the cathode of the diode D1, the drain of the power switch tube S1 and the cathode of the input power supply;
said garment unit comprising a capacitor Cn1, a capacitor Cn2, an inductance Ln1, a diode Dn1, n being a natural number and n being equal to or greater than 1, the garment unit comprising five ports: port I, port II, port III, port IV and port V;
one end of the capacitor Cn1 is a port I, the other end of the capacitor Cn1 is respectively connected with the anode of the diode Dn1 and one end of the inductor Ln1, and the cathode of the diode Dn1 is the port II; the other end of the inductor Ln1 is connected with one end of a capacitor Cn2, and the other end of the capacitor Cn2 is a port c; the anode of the diode Dn1 is a port (r), and the other end of the inductor Ln1 is a port (c);
the port I is respectively connected to one end of an inductor L2 and the anode of a diode D1 in the Cuk converter, the port II is respectively connected to the other end of an inductor L2 and one end of a capacitor C2 in the Cuk converter, and the port III is connected to the cathode of an input power supply;
the auxiliary circuit comprises a zero current inductor Lr, an auxiliary inductor Ls, a zero voltage capacitor Cs, diodes D2, D3 and D4;
one end of a zero current inductor Lr is connected with the anode of a diode D4 and the other end of a capacitor C1 in the Cuk converter;
the other end of the zero-current inductor Lr is respectively connected with one end of a capacitor C11 in the first coat unit, one end of an inductor L2 in the Cuk converter and the anode of a diode D1;
the cathode of the diode D2 is respectively connected with the anode of the input power supply and one end of the inductor L1;
the anode of the diode D2 is respectively connected with one end of the auxiliary capacitor Cs and the cathode of the diode D3;
the anode of the diode D3 is connected with one end of the auxiliary inductor Ls;
the other end of the auxiliary inductor Ls is connected with the negative electrode of the input power supply and the source electrode of the power switch tube S1 respectively;
the cathode of the diode D4 is connected with the cathode of the input power supply;
the other end of the zero-voltage capacitor Cs is connected with the source electrode of the power switch tube S1, one end of the capacitor C1 and the other end of the main inductor L1 respectively.
2. The zero-voltage turn-off zero-current turn-on high-gain Cuk converter according to claim 1, wherein:
of the n garment units, the garment unit,
the port (r) of the second garment unit is connected to the port (r) in the first garment unit,
the port of the second garment unit is connected to the port of the first time garment unit,
the port of the second coat unit is connected to the negative pole of the input power supply;
the port (r) of the third garment unit is connected to the port (r) in the second garment unit,
the port of the third garment unit is connected to the port in the second garment unit,
the port of the third coat unit is connected to the negative pole of the input power supply;
.... and so on;
the port (r) of the nth garment unit is connected to the port (r) in the (n-1) th garment unit,
the port of the nth garment unit is connected to the port of the (n-1) th garment unit,
the port of the nth coat unit is connected to the negative pole of the input power supply.
3. The zero-voltage turn-off zero-current turn-on high-gain Cuk converter according to claim 1, wherein: the grid electrode of the power switch tube S1 is connected with the controller.
4. The zero-voltage turn-off zero-current turn-on high-gain Cuk converter according to claim 1, wherein: when the power switch tube S1 is conducted, the power switch tube S1 is conducted under the condition of zero current due to the action of the zero current inductor Lr, and the conduction loss of the power switch tube S1 is eliminated;
when the power switch tube S1 is turned off, due to the effect of the zero-voltage capacitor Cs, the power switch tube S1 is turned off under the zero-voltage condition, and the turn-off loss of the power switch tube S1 is eliminated.
5. A zero-voltage turn-off zero-current turn-on high-gain Boost converter according to claim 1, 2, 3 or 4, wherein when two garment units are included, the operation of the circuit is divided into 10 operation modes:
the first mode is as follows:
at the beginning of the mode, the main switch S1 is conducted under the ZCS condition because the magnitude and direction of the current on the zero-current inductor Lr and the inductor L1 cannot be suddenly changed; in this mode, the diodes D1, D3, D11 and D21 are turned on, the inductors L1, L11 and L21 are discharged, the auxiliary inductor Ls is charged, the capacitors C1, C11 and C21 are charged, and the capacitors Cs, C2, C12 and C22 are discharged; when the diode D3 is turned on, resonance starts between the auxiliary inductor Ls and the zero-voltage capacitor Cs; therefore, the Cs voltage falls sinusoidally, and the Ls current rises sinusoidally; when the zero current inductance Lr decreases linearly to zero, the mode ends;
mode two:
in this mode, the diodes D1, D11, and D21 are turned off, the inductor L1 and the zero-current inductor Lr in the main circuit start to charge, and the current linearly increases; the capacitors C1, C11 and C21 start to discharge, the capacitors C2, C12 and C22 are charged, and the currents of the inductors L11, Lr and L21 are increased linearly; the auxiliary inductor Ls and the zero-voltage capacitor Cs continue to resonate, when the voltage across the zero-voltage capacitor Cs in the auxiliary circuit reaches the negative input voltage-Vin, the diode D2 starts to conduct under ZVS condition, the Cs voltage is clamped at this level, and the mode ends;
mode three:
in the third mode, because the inductor Ls is in resonance with the zero-voltage capacitor Cs, energy is stored when current flows through the inductor Ls; when the voltage on Cs reaches the negative input voltage-Vin, inductor Ls will freewheel through diode D2 to feed back energy to the input power; the working state of the components in the main circuit is the same as the previous mode; when the current of the inductor Ls is reduced to zero and the diode D2 is cut off, the mode ends;
and a fourth mode:
in this mode, the auxiliary circuit stops operating; the working state of the components in the main circuit is the same as the previous mode, and the load is continuously supplied with power by C22; when the power switch tube S1 is turned off, the mode ends;
a fifth mode:
in mode five, due to the existence of zero voltage Cs, the power switch tube S1 is turned off under ZVS; in this mode, the working state of the components in the main circuit is the same as that of the previous mode, and the load is continuously supplied with power by the C22; the current of the inductor L1 is discharged Cs linearly, and when VCS reaches zero, the current of the inductor L1 is charged Cs linearly; when VCs reaches Vc1-Vin, diode D4 begins to conduct under ZVS conditions, the Cs voltage is clamped at this level, and the mode ends;
a sixth mode:
when diode D21 turns on, mode six begins, diode D4 begins to turn on under ZVS condition, and the current of inductor L1 passes through C1, D4 and uin; the inductor current of L2 flows through Lr, D4 and C2; inductor current of L11 flows through C11, Lr, D4 and C12; the inductor current of L21 is divided into two paths, firstly flows through C21, C11, Lr, D4 and the output stage (C22// RL), and then flows through D21, C12 and the output stage (C22// RL); c1, C2, C12 and C22 are charged, C11 and C21 are discharged, and all inductor currents are reduced; this mode ends when the capacitance C21 current drops to zero;
a seventh mode:
when the capacitor C21 current decreases to zero, mode seven begins, in which the capacitor C21 current increases in reverse, and the inductor current of L11 flows through C21, D21; the inductor current of L21 flows through D21, C12 and the output stage (C22// RL); the current states of other inductors are the same as the previous mode, C1, C2, C12, C21 and C22 are charged, C11 is discharged, and the currents of all inductors are reduced; this mode ends when the capacitance C11 current drops to zero;
the mode is eight:
when the current of the capacitor C11 is reduced to zero, a mode eight begins, in the mode, the current of the capacitor C11 is increased in a reverse direction, the inductance current of L2 is divided into two paths, the two paths firstly flow through C11, C21, D21 and C12, and then flow through Lr, D4 and C2; the current states of other inductors are the same as the previous mode, C1, C1, C11, C12, C21 and C22 are charged, C12 is discharged, and all inductor currents are reduced; when the current of the inductor Lr is reduced to zero, the mode is ended;
the mode is nine:
when the inductor Lr current decreases to zero, a mode nine begins, in which the inductor Lr current increases in a reverse direction, and the inductor current of L2 flows through C11, C21, D21, and C12; the current states of other inductors are the same as the previous mode, C1, C1, C12, C21 and C22 are charged, C11 is discharged, and the currents of all other inductors are reduced; when the current of the inductor Lr is reversely increased to the input inductor current, D4 zero current is turned off, and the mode is ended;
and a modality of ten:
when the D4 is turned off with zero current and the D1 and D11 are turned on, the mode ten starts; the inductive current of L1 is divided into three paths; first through C1, D1 and uin, then through C1, C11, D11, C2 and uin, and finally through C1, C11, C21, D21, C12 and uin; inductor current of L2 flows through D1 and C2, inductor current of L11 flows through D11, C2 and C12, inductor current of L21 flows through D21, C12 and the output stage (C22// RL); c1, C11, C21 charge, C2, C12, C22 discharge, and all inductor currents drop.
CN202110970810.XA 2021-08-23 2021-08-23 Zero-voltage turn-off zero-current turn-on high-gain Cuk converter Active CN113691124B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110970810.XA CN113691124B (en) 2021-08-23 2021-08-23 Zero-voltage turn-off zero-current turn-on high-gain Cuk converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110970810.XA CN113691124B (en) 2021-08-23 2021-08-23 Zero-voltage turn-off zero-current turn-on high-gain Cuk converter

Publications (2)

Publication Number Publication Date
CN113691124A true CN113691124A (en) 2021-11-23
CN113691124B CN113691124B (en) 2023-10-27

Family

ID=78581599

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110970810.XA Active CN113691124B (en) 2021-08-23 2021-08-23 Zero-voltage turn-off zero-current turn-on high-gain Cuk converter

Country Status (1)

Country Link
CN (1) CN113691124B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980020600A (en) * 1996-09-10 1998-06-25 윤문수 Zero Voltage Switching 3-Level Auxiliary Resonance Pole Inverter
US20160329828A1 (en) * 2014-11-25 2016-11-10 Northeastern University A Double Auxiliary Resonant Commutated Pole Three-Phase Soft-Switching Inverter Circuit and Modulation Method
CN106787724A (en) * 2016-12-29 2017-05-31 三峡大学 One kind switch zero voltage turn-off dual input high-gain DC/DC converters
CN106849681A (en) * 2017-04-11 2017-06-13 厦门大学 A kind of high-gain isolated active clamping Sofe Switch DC DC converters
CN113258774A (en) * 2021-05-19 2021-08-13 三峡大学 Zero-voltage turn-off zero-current turn-on high-gain Boost converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980020600A (en) * 1996-09-10 1998-06-25 윤문수 Zero Voltage Switching 3-Level Auxiliary Resonance Pole Inverter
US20160329828A1 (en) * 2014-11-25 2016-11-10 Northeastern University A Double Auxiliary Resonant Commutated Pole Three-Phase Soft-Switching Inverter Circuit and Modulation Method
CN106787724A (en) * 2016-12-29 2017-05-31 三峡大学 One kind switch zero voltage turn-off dual input high-gain DC/DC converters
CN106849681A (en) * 2017-04-11 2017-06-13 厦门大学 A kind of high-gain isolated active clamping Sofe Switch DC DC converters
CN113258774A (en) * 2021-05-19 2021-08-13 三峡大学 Zero-voltage turn-off zero-current turn-on high-gain Boost converter

Also Published As

Publication number Publication date
CN113691124B (en) 2023-10-27

Similar Documents

Publication Publication Date Title
US11496054B2 (en) High-gain quasi-resonant DC-DC converter based on voltage doubling rectifier circuit
CN113258774B (en) Zero-voltage-turn-off zero-current-turn-on high-gain Boost converter
CN103095134A (en) Active network boost converter
CN111725993A (en) High-efficiency Sepic soft switch converter and control method thereof
CN113746324B (en) High-gain soft switch Buck-Boost converter
Gao et al. A novel DCM soft-switched SEPIC-based high-frequency converter with high step-up capacity
CN113014097A (en) Boost converter of passive lossless soft switch and control method
CN112787515A (en) Efficiency optimization design method of double-active full-bridge DC-DC converter
CN114679808B (en) Wide-input-voltage soft-switching n-way current-sharing LED output circuit
CN113691126B (en) High-gain soft switch Boost converter
CN113691123B (en) Zero-voltage turn-off zero-current turn-on high-gain Zeta converter
CN114938144A (en) Non-isolated LLC resonant converter circuit
CN113541486A (en) Interleaved diode capacitor network high-gain ZVT (zero voltage zero volt) direct current converter and auxiliary circuit
CN100433529C (en) ZCS-PWM switching unit circuit
CN108768169B (en) Dual-coupling staggered boost converter for fuel cell and control method thereof
CN113691124B (en) Zero-voltage turn-off zero-current turn-on high-gain Cuk converter
CN113691125B (en) Zero-voltage turn-off zero-current turn-on high-gain Sepic converter
CN112366944B (en) Soft switch resonance BOOST converter controlled by pulse width modulation
CN217240596U (en) Buck-Boost soft switching circuit
US20220376619A1 (en) Switched capacitor converter
CN111900877B (en) Soft-switching high-gain direct-current converter based on coupling inductor and boost capacitor
CN213027824U (en) High-voltage wide-input double-tube flyback converter circuit
CN111786558B (en) High-efficiency converter with high boosting capacity
CN110572030B (en) Soft switching DC converter based on coupling inductance
CN110445392B (en) Staggered parallel double-tube forward converter and modulation strategy thereof

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
GR01 Patent grant
GR01 Patent grant
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20211123

Assignee: Nanjing Chixun Electric Technology Co.,Ltd.

Assignor: CHINA THREE GORGES University

Contract record no.: X2023980049857

Denomination of invention: A zero voltage turn off and zero current turn on high gain Cuk converter

Granted publication date: 20231027

License type: Common License

Record date: 20231206

EE01 Entry into force of recordation of patent licensing contract