CN106655775B - Two-port input ZVT high-gain Boost converter with soft switch - Google Patents
Two-port input ZVT high-gain Boost converter with soft switch Download PDFInfo
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- CN106655775B CN106655775B CN201611240846.8A CN201611240846A CN106655775B CN 106655775 B CN106655775 B CN 106655775B CN 201611240846 A CN201611240846 A CN 201611240846A CN 106655775 B CN106655775 B CN 106655775B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The two-port input ZVT high-gain Boost converter with the soft switch realizes two-way input adjustable high gain, and the topological structure comprises two input sources, two inductors, two power switches, two output diodes, a voltage doubling unit and a soft switch auxiliary circuit; the input ends of the first inductor and the second inductor are respectively connected with the anodes of two input power supplies, the output ends of the first inductor and the second inductor are respectively connected with the drains of the first power switch and the second power switch, and the sources of the first power switch and the second power switch are connected with the cathodes of the input power supplies; the grid electrodes of the two power switches are respectively connected with respective controllers; the phase difference between the driving phases of the two power switches is 180 degrees, namely an interleaving control strategy is adopted; the voltage doubling unit in the circuit can improve the gain multiple on the basis of the gain of the original circuit, and the soft switch auxiliary circuit can realize the lossless zero-voltage turn-off of the two power switches. The circuit topology of the invention has no transformer and coupling inductance, has good EMI characteristics, and the soft switch auxiliary circuit can realize zero voltage turn-off of the switching tube, thereby greatly reducing the loss of the switching tube and improving the integral working efficiency of the converter.
Description
Technical Field
The invention relates to a DC-DC converter, in particular to a two-port input ZVT high-gain Boost converter with a soft switch.
Background
In the prior art, most of the converters are basic one-port input Boost converters, have simple structures and Boost capability, but have insufficient Boost capability, large conduction loss in the switching tube on or off process, large voltage stress of related devices and low energy utilization rate, so that the overall working efficiency of the converters is not high. Due to the limitation of the structure and the boosting capability of the converter, the converter is insufficient for occasions needing larger voltage differences between multi-port input and input output, such as an electric automobile system, a photovoltaic grid-connected power generation system and the like, so that the application range is narrower. These problems are attracting more and more attention of students at home and abroad, and corresponding topological structures or solutions are proposed through researches. The existing circuit topologies with high gain capability can be divided into three main categories: the first is to add one or more high-frequency transformers on the original DC-DC converter topology structure by means of transformers, and achieve the purpose of high-gain boosting by changing the transformation ratio of the high-frequency transformers, but the scheme has the advantages that the electric energy is subjected to multiple conversion, and the energy conversion efficiency of the whole system is low; the second is to use coupling inductance to realize high gain boost, the use of coupling inductance can realize large voltage transformation ratio, but leakage inductance exists, and the voltage stress of the switching device is often too high, and electromagnetic interference and other effects are brought. The third is to use a switched capacitor, although this scheme can achieve large ratio boosting, the control of the circuit is too complex due to the excessive switching devices.
Disclosure of Invention
The converter aims to solve the technical problems that in the prior art, the converter cannot input through multiple ports, the boosting capacity is insufficient, the energy conversion efficiency is low, the switching loss is large, the boosting capacity is not adjustable and the like. The invention provides a two-port input ZVT high-gain Boost converter with a soft switch, wherein the circuit topology of the converter does not have a transformer and a coupling inductance, the EMI characteristics are good, the soft switch auxiliary circuit can realize zero-voltage turn-off of a switching tube, the loss of the switching tube is greatly reduced, and the overall working efficiency of the converter is improved.
The technical scheme adopted by the invention is as follows:
a two-port input ZVT high-gain Boost converter with soft switch comprises
Two input power sources V1, V2, two inductors L1, L2, two power switches S1, S2, two output diodes D 01 、D 02 The voltage doubling unit and the soft switch auxiliary circuit;
first inductance L 1 And a second inductance L 2 The input ends of (a) are respectively connected with two power supplies V 1 、V 2 Positive electrode of the first inductance L 1 And a second inductance L 2 The output ends of (a) are respectively connected with the first power switch S 1 And a drain electrode of a second power switch, a first power switch S 1 And a second power switch S 2 Is connected with a power supply V 1 、V 2 Is a negative electrode of (a); two power switches S 1 、S 2 The grid electrodes of the grid electrodes are respectively connected with the respective controllersThe method comprises the steps of carrying out a first treatment on the surface of the Two power switches S 1 、S 2 The phase difference between the driving phases of the two driving phases is 180 degrees, namely an interleaving control strategy is adopted;
first inductance L 1 The output of the voltage doubling unit is connected with the first interface of the soft switch auxiliary circuit, and the fourth interface of the voltage doubling unit is connected with the first interface of the soft switch auxiliary circuit and is connected with the output diode D through the forward direction 01 The fourth interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; second inductance L 2 The output of the voltage doubling unit is connected with the second interface of the soft switch auxiliary circuit, and the output diode D is connected in forward direction 02 The third interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; negative pole of converter output end and two input power sources V 1 、V 2 Is connected with the negative electrode of the battery; an output filter capacitor C is also connected between the positive pole and the negative pole of the output end of the converter 0 ；
Wherein the voltage doubling unit is a unit with four ports formed by two diodes and two capacitors, and the first port passes through the diode D 1 Connect to the third port and the first port via capacitor C 1 Connecting with a fourth port; the second port passes through diode D 2 A fourth port connected to the second port via a capacitor C 2 Connecting a third port;
the soft switching auxiliary circuit is composed of four diodes and two capacitors to form a unit with four ports, the first port passes through the diode D a1 、D a2 Connect to the third port and the first port via capacitor C a1 、D a4 Connecting with a fourth port; the second port passes through diode D a3 、D a4 A fourth port connected to the second port via a capacitor C a2 、D a2 And the third port is connected.
The number of the voltage doubling units is n, n is a natural number, and the value range is n more than or equal to 1.
The fourth port of the first voltage doubling unit is connected with the first port of the second voltage doubling unit, and the like until the nth voltage doubling unit; the fourth port of the nth voltage doubling unit is connected with the soft switch for assistanceThe first interface of the circuit, while passing through the forward-connected output diode D 01 The fourth interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter;
the third port of the first voltage doubling unit is connected with the second port of the second voltage doubling unit, and the like until the nth voltage doubling unit; the third interface of the nth voltage doubling unit is connected with the second interface of the soft switch auxiliary circuit and is connected with the output diode D through the forward direction 02 The third interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter.
The invention relates to a two-port input ZVT high-gain Boost converter with a soft switch, which has the following technical effects:
1: the invention realizes the high gain of two paths of input, the voltage levels of the two input ports can be inconsistent, the access of different voltage levels is realized, and the application range is expanded.
2: the multiplication units are added to form a high-gain boosting network, and the gain effect of the circuit is doubled on the basis of the original gain effect when one voltage doubling unit is added in the circuit, and when n voltage doubling units exist, the gain ratio of the circuit can reach (n+1) times of that of the basic circuit; the circuit has high gain boosting capability, each output is controllable, and converters with different voltage doubling units can be designed according to different application occasions.
3: the soft switch auxiliary circuit is added in the circuit, so that the power switches S1 and S2 are switched off in a lossless zero-voltage mode, the switching loss is reduced, and the working efficiency is improved. The voltage stress of the switching device in the circuit is greatly reduced, and the selectable range is wider.
4: compared with the existing high-gain boost converter, the circuit topology of the invention does not contain a transformer and a coupling inductance, has good EMI characteristics and simple design, and adopts an interleaving parallel control method.
Drawings
Fig. 1 is a schematic diagram of a general circuit in the case where n voltage doubler cells are included in the embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of an embodiment of the ZVT high-gain boost converter of the present invention.
Fig. 3 is a circuit diagram of a single voltage doubling unit used in the present invention.
Fig. 4 is a circuit diagram of a soft switching auxiliary circuit employed in the present invention.
Detailed Description
As shown in fig. 2, a two-port input ZVT high-gain boost DC converter is composed of a low-voltage input power supply, a DC-DC boost circuit, and a soft-switching auxiliary circuit; the two-port input ZVT high-gain Boost (Boost) converter comprises two input power supplies V 1 、V 2 Two inductances L 1 、L 2 Two power switches S 1 、S 2 Two output diodes D 01 、D 02 The soft switch auxiliary circuit comprises a voltage doubling unit and a soft switch auxiliary circuit; the number of the voltage doubling units can be determined according to practical application occasions.
First inductance L 1 And a second inductance L 2 The input ends of (a) are respectively connected with two power supplies V 1 、V 2 Positive electrode of the first inductance L 1 And a second inductance L 2 The output ends of (a) are respectively connected with the first power switch S 1 And a drain electrode of a second power switch, a first power switch S 1 And a second power switch S 2 Is connected with a power supply V 1 、V 2 Is a negative electrode of (a); two power switches S 1 、S 2 The gates of the two controllers are respectively connected with the respective controllers; two power switches S 1 、S 2 The phase difference between the driving phases of the two driving phases is 180 degrees, namely an interleaving control strategy is adopted;
the output of the first inductor L1 is connected with the first interface of the voltage doubling unit, the fourth interface of the voltage doubling unit is connected with the first interface of the soft switch auxiliary circuit, and the output diode D is connected in forward direction 01 The fourth interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; second inductance L 2 The output of the voltage doubling unit is connected with the second interface of the soft switch auxiliary circuit, and the output diode D is connected in forward direction 02 The positive electrode is connected with the output end of the converter,the third interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; negative pole of converter output end and two input power sources V 1 、V 2 Is connected with the negative electrode of the battery; an output filter capacitor C is also connected between the positive pole and the negative pole of the output end of the converter 0 ；
As shown in fig. 3, the voltage doubling unit is a unit with four ports formed by two diodes and two capacitors, the first port passing through the diode D 1 Connect to the third port and the first port via capacitor C 1 Connecting with a fourth port; the second port passes through diode D 2 A fourth port connected to the second port via a capacitor C 2 Connecting a third port;
referring to fig. 4, the soft-switching auxiliary circuit is composed of four diodes and two capacitors to form a unit having four ports, the first port passing through diode D a1 、D a2 Connect to the third port and the first port via capacitor C a1 、D a4 Connecting with a fourth port; the second port passes through diode D a3 、D a4 A fourth port connected to the second port via a capacitor C a2 、D a2 Connecting a third port;
compared with a basic Boost converter, the ZVS high-gain Boost converter has 2 times of gain ratio, the output voltage of the converter is controllable, and two paths of inputs can be independently controlled.
According to the power switch state and the circuit operation process, the circuit can be divided into 5 working states:
(1) Modality 1: power switch S 1 、S 2 All are conducted, at this time, the voltage source V 1 、V 2 Through power switch S1 and power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 All are turned off;
(2) Modality 2: power switch S 1 Conduction, power switch S 2 Turn off when the power supply V 1 Through power switchS 1 Inductance L 1 Charging and low voltage power supply V 2 Through inductance L 2 Capacitance C 2 Capacitance C a2 And diode D a2 Supplying power to a load while a low voltage power supply V 2 Through inductance L 2 Capacitance C 2 And diode D a3 Give electric capacity C a1 Charging, the modal inductance L 2 Capacitance C 2 Capacitance C a2 Discharging, charging capacitor Ca1 to capacitor C a2 Is 0, and capacitor C a1 The voltage rise of (2) is V 1 /(1-D 1 ) In this process, when the switch S 2 Turn off, switch S 2 The rising speed of the terminal voltage is controlled by the capacitor C a2 Limiting its rising rate and capacitance C a2 The terminal voltage drop rate is uniform, so switch S 2 Zero voltage turn-off is realized; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a1 Diode D a2 Diode D a4 All are turned off;
(3) Modality 3: power switch S 1 Conduction, power switch S 2 Turn off when the power supply V 1 Through power switch S 1 Inductance L 1 Charging; low voltage power supply V 2 Through inductance L 2 And diode D 2 Give electric capacity C 1 Charging, while low voltage power supply V 2 Through inductance L 2 Capacitance C 2 And diode D 02 Supplying power to the load; diode D 1 Diode D 01 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 All are turned off;
(4) Modality 4: power switch S 2 Conduction, power switch S 1 Turn off when the power supply V 2 Through power switch S 2 Inductance L 2 Charging and low voltage power supply V 1 Through inductance L 1 Capacitance C 1 Capacitance C a1 And diode D a4 Supplying power to a load while a low voltage power supply V 1 Through inductance L 1 Capacitance C 1 And diode D a1 Give electric capacity C a2 Charging, the modal inductance L 1 Capacitance C 1 Capacitance C a1 Discharging, charging capacitor Ca2 to capacitor C a1 Is 0, and capacitor C a2 The voltage rise of (2) is V 2 /(1-D 2 ) In this process, when the switch S 1 Turn off, switch S 1 The rising speed of the terminal voltage is controlled by the capacitor C a1 Limiting its rising rate and capacitance C a1 The terminal voltage drop rate is uniform, so switch S 1 Zero voltage turn-off is realized; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a2 Diode D a2 Diode D a3 All are turned off;
(5) Modality 5: power switch S 2 Conduction, power switch S 1 Turn off when the power supply V 2 Through power switch S 2 Inductance L 2 Charging; low voltage power supply V 1 Through inductance L 1 And diode D 1 Give electric capacity C 2 Charging, while low voltage power supply V 1 Through inductance L 1 Capacitance C 1 And diode D 01 Supplying power to the load; diode D 2 Diode D 02 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 All are turned off;
in summary, the circuit can realize two paths of input, the voltage levels of the input ports can be inconsistent, meanwhile, the lossless zero-voltage turn-off of the two power switches can be realized, and after the soft switch auxiliary circuit is added, the auxiliary circuit does not influence the control mode and the working characteristic of the original converter because of no switching tube, or the controller controls the phase difference of 180 degrees between each phase of the duty ratio of the two-phase power switches, and the duty ratio of each phase is determined by the input-output relation; the two-port input converter has strong boosting capability, effectively reduces the loss of a switching tube and improves the capability conversion efficiency of the converter. The above embodiment is only for the purpose of simply illustrating the working principle, and adopts a gain module with one voltage doubling unit, and in practice, the corresponding number of voltage doubling units can be designed according to specific application occasions, so as to achieve the purposes of matching with the application occasions and reducing the cost.
The foregoing examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. Not all embodiments are exhaustive. Obvious changes and modifications which are extended by the technical proposal of the invention are still within the protection scope of the invention.
Claims (3)
1. A two-port input ZVT high-gain Boost converter with soft switch is characterized in that: comprising
Two input power sources V1, V2, two inductors L1, L2, two power switches S1, S2, two output diodes D 01 、D 02 The voltage doubling unit and the soft switch auxiliary circuit;
first inductance L 1 And a second inductance L 2 The input ends of (a) are respectively connected with two power supplies V 1 、V 2 Positive electrode of the first inductance L 1 And a second inductance L 2 The output ends of (a) are respectively connected with the first power switch S 1 And a drain electrode of a second power switch, a first power switch S 1 And a second power switch S 2 Is connected with a power supply V 1 、V 2 Is a negative electrode of (a); two power switches S 1 、S 2 The gates of the two controllers are respectively connected with the respective controllers; two power switches S 1 、S 2 The phase difference between the driving phases of the two driving phases is 180 degrees, namely an interleaving control strategy is adopted;
first inductance L 1 The output of the voltage doubling unit is connected with the first interface of the soft switch auxiliary circuit, and the fourth interface of the voltage doubling unit is connected with the first interface of the soft switch auxiliary circuit and is connected with the output diode D through the forward direction 01 The fourth interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; second inductance L 2 The output of the voltage doubling unit is connected with the second interface of the soft switch auxiliary circuit, and the third interface of the voltage doubling unit is connected with the second interface of the soft switch auxiliary circuitOutput diode D through forward connection 02 The third interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter; negative pole of converter output end and two input power sources V 1 、V 2 Is connected with the negative electrode of the battery; an output filter capacitor C is also connected between the positive pole and the negative pole of the output end of the converter 0 ；
Wherein the voltage doubling unit is a unit with four ports formed by two diodes and two capacitors, and the first port passes through the diode D 1 Connect to the third port and the first port via capacitor C 1 Connecting with a fourth port; the second port passes through diode D 2 A fourth port connected to the second port via a capacitor C 2 Connecting a third port;
the soft switching auxiliary circuit is composed of four diodes and two capacitors to form a unit with four ports, the first port passes through the diode D a1 、D a2 Connect to the third port and the first port via capacitor C a1 、D a4 Connecting with a fourth port; the second port passes through diode D a3 、D a4 A fourth port connected to the second port via a capacitor C a2 、D a2 Connecting a third port;
according to the power switch state and the circuit operation process, the circuit can be divided into 5 working states:
modality 1: power switch S 1 、S 2 All are conducted, at this time, the voltage source V 1 、V 2 Through power switch S1 and power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 All are turned off;
modality 2: power switch S 1 Conduction, power switch S 2 Turn off when the power supply V 1 Through power switch S 1 Inductance L 1 Charging and low voltage power supply V 2 Through inductance L 2 Capacitance C 2 Capacitance C a2 And diodeTube D a2 Supplying power to a load while a low voltage power supply V 2 Through inductance L 2 Capacitance C 2 And diode D a3 Give electric capacity C a1 Charging, the modal inductance L 2 Capacitance C 2 Capacitance C a2 Discharging, charging capacitor Ca1 to capacitor C a2 Is 0, and capacitor C a1 The voltage rise of (2) is V 1 (1-D 1 ) In this process, when the switch S 2 Turn off, switch S 2 The rising speed of the terminal voltage is controlled by the capacitor C a2 Limiting its rising rate and capacitance C a2 The terminal voltage drop rate is uniform, so switch S 2 Zero voltage turn-off is realized; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a1 Diode D a2 Diode D a4 All are turned off;
modality 3: power switch S 1 Conduction, power switch S 2 Turn off when the power supply V 1 Through power switch S 1 Inductance L 1 Charging; low voltage power supply V 2 Through inductance L 2 And diode D 2 Give electric capacity C 1 Charging, while low voltage power supply V 2 Through inductance L 2 Capacitance C 2 And diode D 02 Supplying power to the load; diode D 1 Diode D 01 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 All are turned off;
modality 4: power switch S 2 Conduction, power switch S 1 Turn off when the power supply V 2 Through power switch S 2 Inductance L 2 Charging and low voltage power supply V 1 Through inductance L 1 Capacitance C 1 Capacitance C a1 And diode D a4 Supplying power to a load while a low voltage power supply V 1 Through inductance L 1 Capacitance C 1 And diode D a1 Give electric capacity C a2 Charging, the modal inductance L 1 Capacitance C 1 Capacitance C a1 Discharging, charging capacitor Ca2 to capacitor C a1 Is 0, and capacitor C a2 The voltage rise of (2) is V 2 (1-D 2 ) In this process, when the switch S 1 Turn off, switch S 1 The rising speed of the terminal voltage is controlled by the capacitor C a1 Limiting its rising rate and capacitance C a1 The terminal voltage drop rate is uniform, so switch S 1 Zero voltage turn-off is realized; diode D 1 Diode D 2 Diode D 01 Diode D 02 Diode D a2 Diode D a2 Diode D a3 All are turned off;
modality 5: power switch S 2 Conduction, power switch S 1 Turn off when the power supply V 2 Through power switch S 2 Inductance L 2 Charging; low voltage power supply V 1 Through inductance L 1 And diode D 1 Give electric capacity C 2 Charging, while low voltage power supply V 1 Through inductance L 1 Capacitance C 1 And diode D 01 Supplying power to the load; diode D 2 Diode D 02 Diode D a1 Diode D a2 Diode D a2 Diode D a3 Diode D a4 Are all turned off.
2. The two-port input ZVT high-gain Boost converter with soft switching of claim 1, wherein: the number of the voltage doubling units is n, n is a natural number, and the value range is n more than or equal to 1.
3. The two-port input ZVT high-gain Boost converter with soft switching of claim 1, wherein: the fourth port of the first voltage doubling unit is connected with the first port of the second voltage doubling unit, and the like until the nth voltage doubling unit; the fourth port of the nth voltage doubling unit is connected with the first port of the soft switch auxiliary circuit and is connected with the output diode D through the forward direction 01 The fourth interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter;
third end of first voltage doubling unitThe port is connected with the second port of the second voltage doubling unit, and the like until the nth voltage doubling unit; the third interface of the nth voltage doubling unit is connected with the second interface of the soft switch auxiliary circuit and is connected with the output diode D through the forward direction 02 The third interface of the soft switch auxiliary circuit is connected with the positive electrode of the output end of the converter.
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| CN113691126B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | High-gain soft switch Boost converter |
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