CN106787724B - Switch zero-voltage turn-off double-path input high-gain DC/DC converter - Google Patents
Switch zero-voltage turn-off double-path input high-gain DC/DC converter Download PDFInfo
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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
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A switching zero-voltage turn-off double-input high-gain DC/DC converter comprises two direct-current input power supplies, two inductors, two power switches, two zero-voltage turn-off soft switch auxiliary circuits and a multiplication module. The input end of the first inductor is connected with the positive electrode of the first direct current input power supply, the input end of the second inductor is connected with the positive electrode of the second direct current input power supply, the output ends of 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 negative electrode of the input power supply; the grid electrodes of the two power switches are respectively connected with the respective controllers; the two zero-voltage turn-off soft switch auxiliary circuits are composed of a capacitor and two diodes; the output ends of the first inductor and the second inductor are respectively connected with corresponding nodes in the zero-voltage turn-off soft switch auxiliary circuit network; the two multiplication modules are units with four ports, which are composed of two diodes and two capacitors. The invention has simple circuit topology and easy control, and can simultaneously connect the new energy power generation device and the fuel cell into one topology.
Description
Technical Field
The invention relates to a DC/DC converter, in particular to a switch zero-voltage turn-off double-path input high-gain DC/DC converter.
Background
In the prior art, a basic two-phase Boost (Boost) interleaved parallel converter, see fig. 1, comprises a dc input power supply, two inductors, two power switching tubes and two output diodes. The input end of the first inductor and the input end of the second inductor are connected with the positive electrode of the input power supply, the output end of the first inductor is connected with the anode of the first output diode, and the cathode of the first diode and the cathode of the second diode are connected with the upper end of the output end capacitor; a drain electrode of the first power switch is connected between the first inductor and an anode electrode of the first diode, and a source electrode of the first power switch is connected with a cathode electrode of the converter; the output end of the second inductor is connected with the anode of the second output diode, the drain electrode of the second power switch is connected between the second inductor and the anode of the second diode, and the source electrode of the second power switch is connected with the cathode of the converter.
The converter has smaller input and output voltage gain, the voltage stress of the power switch tube and the diode is output voltage, the voltage stress is high, and the loss is larger. The single-path direct current input power supply cannot meet the requirements in the situation that the existing photovoltaic power generation and wind power generation and other new energy power generation are combined, so that the comprehensive utilization rate of energy sources is not improved, and the economic cost is increased; meanwhile, the switching tube has obvious switching loss in the on and off processes, so that the working efficiency is low, and in some occasions with larger input and output voltage differences, the input and output voltage boosting capability of the switching tube is difficult to meet the requirements.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the switch zero-voltage turn-off double-input high-gain DC/DC converter, which combines the power generation of other new energy sources such as photovoltaic power generation, wind power generation and the like by using a double-circuit DC power supply input mode, thereby improving the comprehensive utilization rate of the energy sources, reducing the economic cost and greatly improving the comprehensive utilization rate of the energy sources.
The technical scheme adopted by the invention is as follows:
a switch zero-voltage turn-off double-input high-gain DC/DC converter comprises two DC input power supplies V in1 And V in2 Two power inductances L 1 、L 2 Two power switches S 1 、S 2 The two zero voltages turn off the soft switch auxiliary circuit and multiply the module;
first inductance L 1 And a second inductance L 2 The input ends of (a) are simultaneously connected with a dual-port input power supply V in1 And V in2 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 second power switch S 2 Drain electrode of the first power switch S 1 And a second power switch S 2 Is connected with a dual-port input power supply V in1 And V in2 Is a negative electrode of (a); two power switches S 1 、S 2 The grid electrodes of the two control devices are respectively connected with the respective control devices;
power switch S 1 Corresponding zero voltage turn-offSoft switching auxiliary circuit, consisting of diode D 1 And D 2 And capacitor C 1 Composition is prepared. The connection relation is as follows: diode D 1 And D 2 Series connection, capacitor C 1 Upper end of (D) and diode D 1 、D 2 The nodes connected in series are connected with a first inductance L 1 The output end of (a) is connected with diode D 1 Anode of the second inductance L 2 The output end is connected with the capacitor C 1 Lower end of diode D 2 Cathode of (C) is connected with diode D 1a A cathode of (a);
power switch S 2 Corresponding zero-voltage turn-off soft switch auxiliary circuit is formed by a diode D 3 And D 4 And capacitor C 2 Composition is prepared. The connection relation is as follows: diode D 3 And D 4 Series connection, capacitor C 2 Lower end of (C) and diode D 3 、D 4 The nodes connected in series are connected with a capacitor C 2 Upper end of (2) and second inductance L 2 Is connected with the output end of the diode D 3 The cathode of the (C) is connected with the cathode of the direct current input power supply, and the diode D 4 Anode of (D) is connected to diode D 1b An anode of (a);
a first multiplication module consisting of a diode D 1a 、D 1b And capacitor C 1a 、C 1b Composition is prepared. The connection relation is as follows: diode D 1a Anode and second inductance L of (2) 2 Is connected with the output end of the diode D 1a Cathode and capacitor C of (2) 1a Is connected with the upper end of the connecting rod; capacitor C 1a And C 1b Connected in series, the node of the two is connected with the first inductor L 1 Is connected with the output end of the power supply; capacitor C 1b Lower end of (C) and diode D 4 And D 1b Anode connection of diode D 1b Cathode and diode D of (2) 3 The cathodes of the two are connected together and connected with the cathode of the direct current power supply at the same time;
a second multiplication module consisting of a diode D 2a 、D 2b And capacitor C 2a 、C 2b Composition is prepared. The connection relation is as follows: diode D 2a Anode and capacitor C of (2) 1a Upper end is connected with diode D 2a Cathode and capacitor C of (2) 2a Is connected with the upper end of the connecting rod; capacitor C 2a And C 2b Connected in series with a second electricSense of L 2 Is connected with the output end of the power supply; capacitor C 2b Lower end of (C) and diode D 2b Is connected to the anode of the battery. The upper end of the load resistor R is connected with the capacitor C 2a Upper end of capacitor C 2b Is arranged at the lower end of the lower part;
the subsequent multiplication modules are sequentially connected; at the same time the first inductance L 1 The output end is connected with the nodes between the upper and lower serial capacitors of all the odd multiplication modules; second inductance L 2 The output end of the (a) is connected with the node between the upper capacitor and the lower capacitor of all even multiplication modules.
The zero-voltage turn-off soft switch auxiliary circuit is a three-port unit, and the capacitor is connected to the intermediate nodes of the two diodes connected in series.
The converter control mode is an interleaving control strategy.
The switch zero-voltage turn-off double-input high-gain DC/DC converter has the following beneficial effects:
1. according to the invention, two different new energy power generation systems can be effectively connected into one circuit topology, so that the economic cost is reduced and the energy use efficiency is improved.
2. The invention adds the multiplication module to form a high-gain Boost network, thereby realizing the gain of the input and output voltage of the basic Boost converter which is 2n times, and simultaneously the multiplication module can increase and decrease the quantity according to the requirement, thereby widening the application occasions of the converter.
3. The zero-voltage turn-off soft switch auxiliary circuit is added in the circuit, so that the soft switch functions of the power switches S1 and S2 are realized, the switching loss is reduced, and the working efficiency is improved.
4. The voltage stress of the switching devices in the circuit is greatly reduced.
5. Compared with the existing high-gain boost converter, the high-gain boost converter does not contain a transformer and a coupling inductor, and is simple in circuit topology and easy to realize.
Drawings
Fig. 1 is a schematic diagram of a prior art two-phase Boost (Boost) interleaved parallel converter circuit.
Fig. 2 is a schematic circuit diagram of a 2-group multiplier module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a zero voltage turn-off soft switch auxiliary circuit employed in the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in FIG. 2, a dual-port input high-gain DC/DC converter with soft switch is exemplified by 2 multiplication modules, which consists of two paths of input power sources V in1 And V in2 The DC/DC boosting circuit and the soft switch auxiliary circuit are formed; comprising two DC input power sources V in1 And V in2 Two power inductances L 1 、L 2 Two power switches S 1 、S 2 Six diodes D 1 、D 2 、D 3 、D 4 、D 1a 、D 1b 、D 2a 、D 2b And five capacitors C 1 、C 2 、C 1a 、C 1b 、C 2a 、C 2b 。
First inductance L 1 And a second inductance L 2 The input ends of (a) are respectively connected with a dual-port input power supply V in1 And V in2 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 second power switch S 2 Drain electrode of the first power switch S 1 And a second power switch S 2 Is connected with a dual-port input power supply V in1 And V in2 Is a negative electrode of (a); two power switches S 1 、S 2 The gates of which are respectively connected with the respective controllers.
S 1 Corresponding zero-voltage turn-off soft switch auxiliary circuit is formed by a diode D 1 And D 2 And capacitor C 1 Composition is prepared. The connection relation is as follows: diode D 1 And D 2 Series connection, capacitor C 1 Upper end of (D) and diode D 1 、D 2 The nodes connected in series are connected with a first inductance L 1 The output end of (a) is connected with diode D 1 Anode of the second inductance L 2 The output end is connected with the capacitor C 1 Lower end of diode D 2 Cathode-connected diode of (c)D 1a A cathode of (a); s is S 2 Corresponding zero-voltage turn-off soft switch auxiliary circuit is formed by a diode D 3 And D 4 And capacitor C 2 Composition is prepared. The connection relation is as follows: diode D 3 And D 4 Series connection, capacitor C 2 Lower end of (C) and diode D 3 、D 4 The nodes connected in series are connected with a capacitor C 2 Upper end of (2) and second inductance L 2 Is connected with the output end of the diode D 3 The cathode of the (C) is connected with the cathode of the direct current input power supply, and the diode D 4 Anode of (D) is connected to diode D 1b Is a positive electrode of (a).
A first multiplication module consisting of a diode D 1a 、D 1b And capacitor C 1a 、C 1b Composition is prepared. The connection relation is as follows: diode D 1a Anode and second inductance L of (2) 2 Is connected with the output end of the diode D 1a Cathode and capacitor C of (2) 1a Is connected with the upper end of the connecting rod; capacitor C 1a And C 1b Connected in series, the node of the two is connected with the first inductor L 1 Is connected with the output end of the power supply; capacitor C 1b Lower end of (C) and diode D 4 And D 1b Anode connection of diode D 1b Cathode and diode D of (2) 3 The cathodes of the two are connected together and connected with the cathode of the direct current power supply.
A second multiplication module consisting of a diode D 2a 、D 2b And capacitor C 2a 、C 2b Composition is prepared. The connection relation is as follows: diode D 2a Anode and capacitor C of (2) 1a Upper end is connected with diode D 2a Cathode and capacitor C of (2) 2a Is connected with the upper end of the connecting rod; capacitor C 2a And C 2b Connected in series, the node of the two is connected with the second inductor L 2 Is connected with the output end of the power supply; capacitor C 2b Lower end of (C) and diode D 2b Is connected to the anode of the battery. The upper end of the load resistor R is connected with the capacitor C 2a Upper end of capacitor C 2b Is arranged at the lower end of the frame.
The subsequent multiplication modules are sequentially connected; at the same time the first inductance L 1 The output end is connected with the nodes between the upper and lower serial capacitors of all the odd multiplication modules; second inductance L 2 The output of (a) and the upper and lower capacitors of all even multiplication modulesThe nodes are connected.
The multiplication module is a unit with four ports, which is composed of two diodes and two capacitors, wherein the anode of an upper diode is used as a first port, the node between the cathode of the upper diode and the capacitor is used as a second port, the node between the anode of a lower diode and the lower diode is used as a third port, and the cathode of the lower diode is used as a fourth port.
Compared with a traditional Boost converter, the switching zero-voltage-off two-way input high-gain DC/DC converter has a gain ratio of 4 times.
According to different power switch states, the circuit can be divided into 6 working modes:
1. modality 1: power switch S 1 、S 2 All are conducted, at the moment, two paths of direct current input power supplies pass through the power switch S 1 And a power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; capacitor C 2a 、C 2b All discharge to the output end; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 1b 、D 2a 、D 2b Are all turned off.
2. Modality 2: controller controls power switch S 1 Turn off, S 2 On, diode D 1 Conduction, DC power supply V in1 Inductance L 1 Is passed through diode D 1 Give electric capacity C 1 Charging, after passing through S 2 Flowing back to the negative electrode of the power supply; at this time, capacitor C 1 The voltage rises when U c1 =U c1b When the charging is completed, diode D 1 Turning off; switch S in the process 1 Zero voltage turn-off is realized; at C 1 While charging, inductance L 1 Is passed through capacitor C 1b Diode D 4 Capacitance C 2 This process capacitance C 1b Charging, capacitor C 2 Discharging until U c2 Until =0, diode D 4 And (5) switching off. The whole mode: low voltage input power supply V in1 Inductance L 1 Capacitance C 2 、C 2a 、C 2b All are in a discharge state, C 1b Is in a charged state; at this time, power switch S 2 Keep on state, DC power supply V in2 Through power switch S 2 Inductance L 2 Charging; diode D 2 、D 3 、D 1a 、D 2a 、D 1b 、D 2b Are all turned off.
3. Modality 3: co-modal 2 power switch S 1 Turn off, S 2 On, when the capacitor C in mode 2 1 When the charging is completed, diode D 1 Shut off, C 2 When the discharge is completed, diode D 4 Turn off, at this time the inductance L 1 Is passing through C 1a 、C 1b The node between them is split, one part of the split is passed through a capacitor C 1a Diode D 2a Capacitance C 2a Switch S 2 Flow back to the negative electrode of the power supply, capacitor C 1a Discharging, capacitance C 2a Charging; a second part of current flows through the capacitor C 2a Shunt, flow through load resistor R, capacitor C 2b This process capacitance C 2b Discharging; through C 1a 、C 1b A third part of current at the node between the capacitors passes through the capacitor C 1b Diode D 1b Back to the negative electrode of the power supply, at this time capacitor C 1b Is in a charged state; the whole mode: two-way input direct current power supply and inductor L 1 Capacitance C 1a 、C 2b In a discharge state, capacitor C 1b 、C 2a Are all in a charged state; at this time, power switch S 2 Keep on state, the low-voltage power supply passes through the power switch S 2 Inductance L 2 Charging; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 2b Are all turned off.
4. Modality 4: same mode 1, power switch S 1 、S 2 All are conducted, at the moment, two paths of direct current input power supplies pass through the power switch S 1 And a power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; capacitor C 2a 、C 2b All discharge to the output end; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 1b 、D 2a 、D 2b Are all turned off.
5. Modality 5: controller controls power switch S 1 Conduction, S 2 Turn off when inputting power V in2 And inductance L 2 Through capacitor C 2 Diode D 3 Flowing back to the negative electrode of the power supply; at this time, capacitor C 2 The voltage rises when U c2 =U c1a Diode D at this time 3 Turning off; switch S in the process 2 Zero voltage turn-off is realized; another part of the current passes through the capacitor C 1 Diode D 2 Capacitance C 1a Switch S 1 Flow back to the negative electrode of the power supply, capacitor C 1 Discharging, capacitance C 1a Charging when the capacitor C 1 Voltage U of (2) c1 When falling to 0, diode D 2 Turn off, capacitance C 1 The discharge is completed; the whole mode: low voltage input power supply, inductance L 2 Capacitance C 1 、C 2a 、C 2b Discharging, capacitance C 2 、C 1a In a charged state, the power switch S 1 Keep on state, direct current input power V in1 Through power switch S 1 Inductance L 1 Charging; diode D 1 、D 4 、D 1a 、D 2a 、D 1b 、D 2b Are all turned off.
6. Modality 6: c in modality 5 1 When the discharge is completed, diode D 2 Turn off diode D 1a Conduction and inductance L 2 Is passing through D 1a The junction at the lower end of the anode is divided, and the first part passes through a diode D 1a Capacitance C 1a Switch S 1 Flow back to the negative electrode of the power supply, capacitor C 1a Charging; a second part of current passes through the capacitor C 2b Diode D 2b Capacitance C 1b Switch S 1 Flowing back to the negative electrode of the power supply; the third part of current flows through the load resistor R and the capacitor C 2b This process capacitance C 2b Discharging; the whole mode: capacitor C 1a 、C 2b Charging, capacitor C 1b 、C 2a In a discharge state, diode D 1 、D 2 、D 3 、D 4 、D 1b 、D 2a Are all turned off.
In summary, the topology solves the problems of low working efficiency, insufficient boosting capacity and the like of the converter, can realize the maximization of the access utilization rate of new energy by adopting multiple paths of inputs, reduces the voltage stress of the switching tube, has adjustable boosting gain, and can be flexibly applied to occasions with high requirements on boosting capacity.
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 (2)
1. A switch zero voltage turn-off double-input high-gain DC/DC converter is characterized in that:
comprising two DC input power sources V in1 And V in2 Two power inductances L 1 、L 2 Two power switches S 1 、S 2 The two zero voltages turn off the soft switch auxiliary circuit and multiply the module;
first inductance L 1 And a second inductance L 2 The input ends of (a) are simultaneously connected with a dual-port input power supply V in1 And V in2 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 second power switch S 2 Drain electrode of the first power switch S 1 And a second power switch S 2 Is connected with a dual-port input power supply V in1 And V in2 Is a negative electrode of (a); two power switches S 1 、S 2 The grid electrodes of the two control devices are respectively connected with the respective control devices;
power switch S 1 Corresponding zero-voltage turn-off soft switch auxiliary circuit is formed by a diode D 1 And D 2 And capacitor C 1 Composition; the connection relation is as follows: diode D 1 And D 2 In series connection with each other,capacitor C 1 Upper end of (D) and diode D 1 、D 2 The nodes connected in series are connected with a first inductance L 1 The output end of (a) is connected with diode D 1 Anode of the second inductance L 2 The output end is connected with the capacitor C 1 Lower end of diode D 2 Cathode of (C) is connected with diode D 1a A cathode of (a);
power switch S 2 Corresponding zero-voltage turn-off soft switch auxiliary circuit is formed by a diode D 3 And D 4 And capacitor C 2 Composition; the connection relation is as follows: diode D 3 And D 4 Series connection, capacitor C 2 Lower end of (C) and diode D 3 、D 4 The nodes connected in series are connected with a capacitor C 2 Upper end of (2) and second inductance L 2 Is connected with the output end of the diode D 3 The cathode of the (C) is connected with the cathode of the direct current input power supply, and the diode D 4 Anode of (D) is connected to diode D 1b An anode of (a);
a first multiplication module consisting of a diode D 1a 、D 1b And capacitor C 1a 、C 1b Composition; the connection relation is as follows: diode D 1a Anode and second inductance L of (2) 2 Is connected with the output end of the diode D 1a Cathode and capacitor C of (2) 1a Is connected with the upper end of the connecting rod; capacitor C 1a And C 1b Connected in series, the node of the two is connected with the first inductor L 1 Is connected with the output end of the power supply; capacitor C 1b Lower end of (C) and diode D 4 And D 1b Anode connection of diode D 1b Cathode and diode D of (2) 3 The cathodes of the two are connected together and connected with the cathode of the direct current power supply at the same time;
a second multiplication module consisting of a diode D 2a 、D 2b And capacitor C 2a 、C 2b Composition; the connection relation is as follows: diode D 2a Anode and capacitor C of (2) 1a Upper end is connected with diode D 2a Cathode and capacitor C of (2) 2a Is connected with the upper end of the connecting rod; capacitor C 2a And C 2b Connected in series, the node of the two is connected with the second inductor L 2 Is connected with the output end of the power supply; capacitor C 2b Lower end of (C) and diode D 2b Is connected with the anode of the battery; the upper end of the load resistor R is connected with the capacitor C 2a Is above (1)Terminal, capacitor C 2b Is arranged at the lower end of the lower part;
the subsequent multiplication modules are sequentially connected; at the same time the first inductance L 1 The output end is connected with the nodes between the upper and lower serial capacitors of all the odd multiplication modules; second inductance L 2 The output end of the (a) is connected with the nodes between the upper and lower capacitors of all the even multiplication modules;
according to different power switch states, the circuit can be divided into 6 working modes:
modality 1: power switch S 1 、S 2 All are conducted, at the moment, two paths of direct current input power supplies pass through the power switch S 1 And a power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; capacitor C 2a 、C 2b All discharge to the output end; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 1b 、D 2a 、D 2b All are turned off;
modality 2: controller controls power switch S 1 Turn off, S 2 On, diode D 1 Conduction, DC power supply V in1 Inductance L 1 Is passed through diode D 1 Give electric capacity C 1 Charging, after passing through S 2 Flowing back to the negative electrode of the power supply; at this time, capacitor C 1 The voltage rises when U c1 ＝U c1b When the charging is completed, diode D 1 Turning off; switch S in the process 1 Zero voltage turn-off is realized; at C 1 While charging, inductance L 1 Is passed through capacitor C 1b Diode D 4 Capacitance C 2 This process capacitance C 1b Charging, capacitor C 2 Discharging until U c2 Until =0, diode D 4 Turning off; the whole mode: low voltage input power supply V in1 Inductance L 1 Capacitance C 2 、C 2a 、C 2b All are in a discharge state, C 1b Is in a charged state; at this time, power switch S 2 Keep on state, DC power supply V in2 Through power switch S 2 Inductance L 2 Charging; diode D 2 、D 3 、D 1a 、D 2a 、D 1b 、D 2b All are turned off;
modality 3: co-modal 2 power switch S 1 Turn off, S 2 On, when the capacitor C in mode 2 1 When the charging is completed, diode D 1 Shut off, C 2 When the discharge is completed, diode D 4 Turn off, at this time the inductance L 1 Is passing through C 1a 、C 1b The node between them is split, one part of the split is passed through a capacitor C 1a Diode D 2a Capacitance C 2a Switch S 2 Flow back to the negative electrode of the power supply, capacitor C 1a Discharging, capacitance C 2a Charging; a second part of current flows through the capacitor C 2a Shunt, flow through load resistor R, capacitor C 2b This process capacitance C 2b Discharging; through C 1a 、C 1b A third part of current at the node between the capacitors passes through the capacitor C 1b Diode D 1b Back to the negative electrode of the power supply, at this time capacitor C 1b Is in a charged state; the whole mode: two-way input direct current power supply and inductor L 1 Capacitance C 1a 、C 2b In a discharge state, capacitor C 1b 、C 2a Are all in a charged state; at this time, power switch S 2 Keep on state, the low-voltage power supply passes through the power switch S 2 Inductance L 2 Charging; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 2b All are turned off;
modality 4: same mode 1, power switch S 1 、S 2 All are conducted, at the moment, two paths of direct current input power supplies pass through the power switch S 1 And a power switch S 2 Respectively to the inductance L 1 And inductance L 2 Charging; capacitor C 2a 、C 2b All discharge to the output end; diode D 1 、D 2 、D 3 、D 4 、D 1a 、D 1b 、D 2a 、D 2b All are turned off;
modality 5: controller controls power switch S 1 Conduction, S 2 Turn off when inputting power V in2 And inductance L 2 Is turned on by a part of the currentExcess capacitor C 2 Diode D 3 Flowing back to the negative electrode of the power supply; at this time, capacitor C 2 The voltage rises when U c2 ＝U c1a Diode D at this time 3 Turning off; switch S in the process 2 Zero voltage turn-off is realized; another part of the current passes through the capacitor C 1 Diode D 2 Capacitance C 1a Switch S 1 Flow back to the negative electrode of the power supply, capacitor C 1 Discharging, capacitance C 1a Charging when the capacitor C 1 Voltage U of (2) c1 When falling to 0, diode D 2 Turn off, capacitance C 1 The discharge is completed; the whole mode: low voltage input power supply, inductance L 2 Capacitance C 1 、C 2a 、C 2b Discharging, capacitance C 2 、C 1a In a charged state, the power switch S 1 Keep on state, direct current input power V in1 Through power switch S 1 Inductance L 1 Charging; diode D 1 、D 4 、D 1a 、D 2a 、D 1b 、D 2b All are turned off;
modality 6: c in modality 5 1 When the discharge is completed, diode D 2 Turn off diode D 1a Conduction and inductance L 2 Is passing through D 1a The junction at the lower end of the anode is divided, and the first part passes through a diode D 1a Capacitance C 1a Switch S 1 Flow back to the negative electrode of the power supply, capacitor C 1a Charging; a second part of current passes through the capacitor C 2b Diode D 2b Capacitance C 1b Switch S 1 Flowing back to the negative electrode of the power supply; the third part of current flows through the load resistor R and the capacitor C 2b This process capacitance C 2b Discharging; the whole mode: capacitor C 1a 、C 2b Charging, capacitor C 1b 、C 2a In a discharge state, diode D 1 、D 2 、D 3 、D 4 、D 1b 、D 2a Are all turned off.
2. The switching zero voltage off dual input high gain DC/DC converter of claim 1, wherein: the zero-voltage turn-off soft switch auxiliary circuit is a three-port unit, and the capacitor is connected to the intermediate nodes of the two diodes connected in series.
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| CN110034681B (en) * | 2019-04-28 | 2021-01-26 | 三峡大学 | Staggered parallel ZVZCS high-boost DC/DC converter |
| CN112787511B (en) * | 2020-12-31 | 2022-11-01 | 深圳市核达中远通电源技术股份有限公司 | Dual-input hydrogen fuel cell DC/DC converter and control method thereof |
| CN113691126B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | High-gain soft switch Boost converter |
| CN113691123B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | Zero-voltage turn-off zero-current turn-on high-gain Zeta converter |
| CN113746324B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | High-gain soft switch Buck-Boost converter |
| CN113691124B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | Zero-voltage turn-off zero-current turn-on high-gain Cuk converter |
| CN113691125B (en) * | 2021-08-23 | 2023-10-27 | 三峡大学 | Zero-voltage turn-off zero-current turn-on high-gain Sepic converter |
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Application publication date: 20170531 Assignee: Hubei Yunzhihang Drone Technology Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980044730 Denomination of invention: A Switching Zero Voltage Off Dual Input High Gain DC/DC Converter Granted publication date: 20230602 License type: Common License Record date: 20231027 |
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