CN115603572A - Boost converter - Google Patents
Boost converter Download PDFInfo
- Publication number
- CN115603572A CN115603572A CN202211587641.2A CN202211587641A CN115603572A CN 115603572 A CN115603572 A CN 115603572A CN 202211587641 A CN202211587641 A CN 202211587641A CN 115603572 A CN115603572 A CN 115603572A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- module
- soft switching
- storage module
- soft
- 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
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
- H02M3/10—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
-
- 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
-
- 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
-
- 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
-
- 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 application discloses boost converter relates to substation equipment technical field, and the boost converter of this application includes: the direct-current power supply comprises a direct-current power supply, a first soft switching module, a second soft switching module, a third soft switching module, a first energy storage module, a second energy storage module and an output capacitor; the first soft switching module and the first energy storage module are connected in series between the positive pole and the negative pole of the direct-current power supply, and the second soft switching module and the second energy storage module are connected in series and arranged between the input end of the first soft switching module and the output end of the first soft switching module; the input end of the third soft switch module is connected with the output end of the second soft switch module, the output end of the third soft switch module is connected with the input end of the output capacitor, the output end of the output capacitor is connected with the output end of the first energy storage module, and the two ends of the output capacitor are used as the output of the boost converter. The application provides a boost converter can realize that main switch and auxiliary switch are soft switch, reduces switching loss and electromagnetic interference.
Description
Technical Field
The application relates to the technical field of power transformation equipment, in particular to a boost converter.
Background
A boost converter is a device that changes the voltage of a dc power supply to another voltage, i.e., a boost converter is a dc-to-dc converter whose output voltage is greater than the power supply voltage, because it can boost the power supply voltage is called a boost converter. The dc power supply for the boost converter may be from any suitable dc power source, such as a battery, solar panel, rectifier and dc generator. The boost converter is an important component of the switching power supply and a core for performing direct current electric energy conversion and control. The boost converter mainly undertakes the task of processing direct current energy in a switching power supply and is used for converting input direct current voltage into direct current voltage which meets the requirements of electric equipment and has various high-quality technical indexes.
In order to improve the performance of the switching power supply, high frequency, miniaturization, modularization and intellectualization are the development directions of the current direct current switching power supply. At present, the switching power supply usually works in a high-frequency switching mode. However, the conventional circuit adopts a hard switch working mode, and a switching tube generates larger switching loss and electromagnetic interference in the process of switching on and off. In recent years, a boost converter with soft switching is also applied, and is characterized in that an auxiliary switching tube is added to ensure that a main switching tube is turned on or turned off in a soft switching state, but the boost converter has the defect that the auxiliary switching tube is still a hard switch, and the technical problem cannot be completely solved.
Disclosure of Invention
An object of this application is to provide a boost converter, can realize that main switch and auxiliary switch are soft switch, reduce switching loss and electromagnetic interference.
An aspect of an embodiment of the present application provides a boost converter, including: the direct-current power supply comprises a direct-current power supply, a first soft switching module, a second soft switching module, a third soft switching module, a first energy storage module, a second energy storage module and an output capacitor; the first soft switch module is connected with the first energy storage module in series, the positive electrode of the direct current power supply is connected with the input end of the first soft switch module, and the output end of the first energy storage module is connected with the negative electrode of the direct current power supply; the second soft switch module is connected with the second energy storage module in series, the input end of the second soft switch module is connected with the input end of the first soft switch module, and the output end of the second energy storage module is connected with the output end of the first soft switch module; the input end of the third soft switch module is connected with the output end of the second soft switch module, the output end of the third soft switch module is connected with the input end of the output capacitor, the output end of the output capacitor is connected with the output end of the first energy storage module, and the two ends of the output capacitor are used as the output of the boost converter.
As an implementation manner, the first soft switch module includes a bipolar transistor and a first resonant network connected in parallel with the bipolar transistor, an input end of the bipolar transistor is connected with an anode of the dc power supply, an output end of the bipolar transistor is connected with an input end of the first energy storage module, and a signal end of the bipolar transistor is connected with the control signal to control on/off of the bipolar transistor according to the control signal.
As an implementation manner, the first soft switch module includes a field effect transistor, an input end of the field effect transistor is connected with an anode of the dc power supply, an output end of the field effect transistor is connected with an input end of the first energy storage module, and a signal end of the field effect transistor is connected with the control signal to control on/off of the field effect transistor according to the control signal.
As an implementation manner, the second soft switching module includes a first rectifying element and a second resonant network connected in parallel, and the positive electrode of the dc power supply is connected to the positive electrode of the first rectifying element.
As an implementation manner, the third soft switching module includes a second rectifying element and a third resonant network connected in parallel, and an anode of the second rectifying element is connected to a cathode of the first rectifying element.
As a practical manner, the first rectifying element and the second rectifying element each include a diode.
As an implementation manner, the first energy storage module includes an energy storage inductor, and the second energy storage module includes an energy storage capacitor.
As an implementable manner, when the first soft switch module is closed based on the control signal, the current of the dc power supply supplies the first energy storage module and the second energy storage module to store energy, and after the second energy storage module stores energy, the current is transmitted to the output capacitor through the third soft switch module.
As an implementation manner, when the first soft switching module is turned off based on the control signal, the third soft switching module enters into a reverse zero-current switch, the first energy storage module discharges and charges the second energy storage module, and after the second energy storage module is fully charged, the second soft switching module is turned off in a zero-current switching mode.
The beneficial effects of the embodiment of the application include:
the present application provides a boost converter, comprising: the direct-current power supply comprises a direct-current power supply, a first soft switching module, a second soft switching module, a third soft switching module, a first energy storage module, a second energy storage module and an output capacitor; the first soft switch module, the second soft switch module and the third soft switch module can realize Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS), the first soft switch module is connected with the first energy storage module in series, the positive pole of the direct Current power supply is connected with the input end of the first soft switch module, and the output end of the first energy storage module is connected with the negative pole of the direct Current power supply; the first energy storage module stores energy or discharges under the control of the first soft switch module to realize the voltage rise of the direct-current power supply, and realizes zero current turn-off ZCS when the first soft switch module is turned off, and realizes zero voltage turn-on ZVS when the first soft switch module is turned on; the second soft switching module is connected with the second energy storage module in series, the input end of the second soft switching module is connected with the input end of the first soft switching module, and the output end of the second energy storage module is connected with the output end of the first soft switching module; the input end of the third soft switch module is connected with the output end of the second soft switch module, the output end of the third soft switch module is connected with the input end of the output capacitor, the output end of the output capacitor is connected with the output end of the first energy storage module, and the two ends of the output capacitor are used as the output of the boost converter. The second energy storage module is arranged between the second soft switch module and the third soft switch module, the Voltage of the second energy storage module enables the second soft switch module and the third soft switch module to form a Zero Voltage-Zero Current switch (ZVZCS) in the period of a control signal, and the soft switch mode of the auxiliary switch is realized, so that the main switch and the auxiliary switch are soft switches, and the Switching loss and the electromagnetic interference are reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a circuit diagram of a boost converter according to an embodiment of the present disclosure;
fig. 2 is a second circuit diagram of a boost converter according to an embodiment of the present application;
fig. 3 is a third circuit diagram of a boost converter according to an embodiment of the present disclosure;
FIG. 4 is a fourth circuit diagram of a boost converter according to an embodiment of the present disclosure;
fig. 5 is a waveform diagram of various components in the operation process of a boost converter according to an embodiment of the present application.
Icon: 10-a boost converter; 110-a direct current power supply; 120-a first soft switching module; 121-bipolar transistor; 122-a first resonant network; 123-field effect transistor; 130-a second soft switching module; 131-a first rectifying element; 132-a second resonant network; 140-a third soft switching module; 141-a second rectifying element; 142-a third resonant network; 150-a first energy storage module; 151-energy storage inductance; 160-a second energy storage module; 161-energy storage capacitor; 170-output capacitor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
The switching power supply converts a level voltage into a voltage or a current required by a user terminal through different types of circuits, wherein the boost converter is used for converting the level voltage of a low voltage into the output of a power supply of a higher voltage, a switching element is usually adopted to turn on or off the boost converter, the traditional circuit adopts a hard switch working mode, and a switching tube generates larger switching loss and electromagnetic interference in the process of turning on and off.
The present application provides a boost converter 10, as shown in fig. 1, comprising: a dc power supply 110, a first soft switching module 120, a second soft switching module 130, a third soft switching module 140, a first energy storage module 150, a second energy storage module 160, and an output capacitor 170; the first soft switching module 120 is connected in series with the first energy storage module 150, the positive electrode of the direct current power supply 110 is connected with the input end of the first soft switching module 120, and the output end of the first energy storage module 150 is connected with the negative electrode of the direct current power supply 110; the second soft switching module 130 is connected in series with the second energy storage module 160, the input end of the second soft switching module 130 is connected with the input end of the first soft switching module 120, and the output end of the second energy storage module 160 is connected with the output end of the first soft switching module 120; the input end of the third soft switching module 140 is connected to the output end of the second soft switching module 130, the output end of the third soft switching module 140 is connected to the input end of the output capacitor 170, the output end of the output capacitor 170 is connected to the output end of the first energy storage module 150, and both ends of the output capacitor 170 are used as the output of the boost converter 10.
As shown in fig. 1 and fig. 5, the operation of the boost converter 10 according to the embodiment of the present application is described according to a circuit diagram and a waveform diagram, where a in fig. 5 is a waveform diagram of a control signal of the first soft switching module 120, and when a high level is used to control the first soft switching module 120 to be turned on, and when a low level is used to control the first soft switching module 120 to be turned off; the waveform of b refers to the waveform diagram of the current of the first energy storage module 150; c-waveform refers to a waveform diagram of the voltage of the second energy storage module 160; the d waveform is a waveform diagram of the voltage of the first rectifying element 131 of the second soft switching module; the e waveform is a waveform diagram of the current of the first rectifying element 131; the f waveform is a waveform diagram of the voltage of the second rectifying element 141 of the third soft switching module 140; the g waveform is a waveform diagram of the current of the second rectifier element 141; h is a waveform diagram of the voltage of the source (or collector) of the first soft switching module 120; i refers to a waveform of a current of the source (or collector) of the first soft switching module 120.
Because the first soft switching module 120 and the first energy storage module 150 are connected in series, the input end of the first soft switching module 120 is connected with the positive electrode of the dc power supply 110, and the first energy storage module 150 is connected with the negative electrode of the dc power supply 110, so that the voltage of the dc power supply 110 is applied between the first soft switching module 120 and the first energy storage module 150, when the first soft switching module 120 is turned on under the control of the control signal, the first energy storage module 150 stores energy, and at the same time, the second energy storage module 160 discharges through the third soft switching module 140 to transmit current to the output capacitor 170, thereby increasing the voltage; since the second energy storage module 160 has a higher voltage, the second soft switching module 130 is in an off state, at this time, the third soft switching module 140 turns on ZVS at zero voltage, and the second soft switching module 130 turns off ZCS at zero current, thereby implementing a soft switching mode of the auxiliary switch.
When the first soft switching module 120 is turned off under the control of the control signal, the first soft switching module 120 is turned off in a zero current turn-off ZCS mode due to the soft switching property of the first soft switching module 120, and at this time, three time periods (t) are included after the first soft switching module 120 is turned off 0 -t 1 ）、（t 1 -t 2 ) And (t) 2 -t 3 ) Wherein (t) 0 -t 1 ) Meanwhile, since the first soft switching module 120 is a soft switch, the voltage rise is delayed after the first soft switching module 120 is turned off, so that the energy storage of the first energy storage module 150 becomes delayed until t 1 The time reaches the maximum value, and at the same time, the third soft switching module 140 reversely enters zero current to turn off, so that the second energy storage module 160 cannot transmit current through the third soft switching module 140, but stores the current. At (t) 1 -t 2 ) When the voltage and current of the first soft switching module 120 are reduced to zero, the second soft switching module 130 is connected to the positive electrode of the dc power supply 110 and the zero voltage turns on ZVS, the first energy storage module 150 discharges, the current of the first energy storage module 150 is ramped from the maximum value in a sinusoidal manner and charges the second energy storage module 160 until the second energy storage module 160 is fully charged to its maximum value (t: (t) 2 ) The second soft switching module 130 turns off in such a way that zero current turns off ZCS. At (t) 2 -t 3 ) The current on the first energy storage module 150 swings towards positive values until t 3 The time is zero, the work in one period is completed, the work in the next period is started, and the first soft switch module 120 is switched on for ZVS at zero voltage.
As can be seen from the above, in one cycle of the operation of the boost converter 10, the first soft switching module 120 implements zero-voltage turn-on ZVS and zero-current turn-off ZCS to implement soft switching of the main switch; the second soft switching module 130 and the third soft switching module 140 form a zero-voltage-zero-current switch ZVZCS in the positive whole period, so as to realize a soft switching mode of the auxiliary switch; thereby realizing soft switching mode of the main switch and the auxiliary switch, thereby reducing switching loss and electromagnetic interference.
In the embodiment of the present application, the first soft switching module 120, the second soft switching module 130, and the third soft switching module 140 can satisfy the soft switching mode of zero-voltage turn-on ZVS and also satisfy the switching mode of zero-current turn-off ZCS. The embodiments of the present application are not limited to the specific soft switching mode, as long as zero voltage turn-on ZVS and zero current turn-off ZCS can be satisfied.
In the boost converter 10 provided by the present application, the first soft switching module 120, the second soft switching module 130, and the third soft switching module 140 can all realize zero voltage turn-on ZVS and zero current turn-off ZCS, the first soft switching module 120 is connected in series with the first energy storage module 150, the positive electrode of the dc power supply 110 is connected to the input end of the first soft switching module 120, and the output end of the first energy storage module 150 is connected to the negative electrode of the dc power supply 110; so that the first energy storage module 150 stores energy or discharges under the control of the first soft switching module 120, thereby realizing the voltage rise of the dc power supply 110, and realizing zero current turn-off ZCS when the first soft switching module 120 is turned off, and realizing zero voltage turn-on ZVS when the first soft switching module 120 is turned on; the second energy storage module 160 is arranged between the second soft switching module 130 and the third soft switching module 140, and the voltage of the second energy storage module 160 enables the second soft switching module 130 and the third soft switching module 140 to form a zero-voltage-zero-current switch ZVZCS in the period of the control signal, so that the soft switching mode of the auxiliary switch is realized, the main switch and the auxiliary switch are both soft switches, and the switching loss and the electromagnetic interference are reduced.
Optionally, as shown in fig. 2 and fig. 3, the first soft switch module 120 includes a bipolar transistor 121 and a first resonant network 122 connected in parallel with the bipolar transistor 121, an input end of the bipolar transistor 121 is connected to the positive electrode of the dc power supply 110, an output end of the bipolar transistor 121 is connected to an input end of the first energy storage module 150, and a signal end of the bipolar transistor 121 is connected to a control signal to control on/off of the bipolar transistor 121 according to the control signal.
The bipolar transistor 121 is connected in parallel with the first resonant network 122 to form the first soft switch module 120, a signal end of the bipolar transistor 121, that is, a base of the bipolar transistor 121 is connected to a control signal to control on/off of the bipolar transistor 121 according to the control signal, when the base is controlled by the control signal to be turned on, so that the bipolar transistor 121 is turned on, because the bipolar transistor 121 is connected in parallel with the first resonant network 122, when the bipolar transistor 121 is turned on, a voltage at two ends of the bipolar transistor 121 is zero, and zero-voltage conduction ZVS of the bipolar transistor 121 is realized. When the base of the bipolar transistor 121 is controlled to be disconnected by the control signal, and the bipolar transistor 121 is turned off, the current at two ends of the bipolar transistor 121 is zero when the bipolar transistor 121 is turned off because the bipolar transistor 121 is connected in parallel with the first resonant network 122, so that zero current turn-off ZCS of the bipolar transistor 121 is realized.
The specific form of the bipolar transistor 121 is not limited in the embodiment of the present application, and may be, for example, an insulated gate bipolar transistor as shown in fig. 3, or a bipolar junction transistor as shown in fig. 2.
In an implementation manner of the embodiment of the present application, as shown in fig. 4, the first soft switching module 120 includes a field-effect transistor 123, an input end of the field-effect transistor 123 is connected to the positive electrode of the dc power supply 110, an output end of the field-effect transistor 123 is connected to an input end of the first energy storage module 150, and a signal end of the field-effect transistor 123 is connected to the control signal to control on/off of the field-effect transistor 123 according to the control signal.
When the voltage of the fet 123 rises linearly from zero, due to the presence of the stray capacitance, when the fet 123 is turned on, the voltages at the two ends of the fet 123 are zero, which is zero voltage conduction ZVS; when the current of the fet 123 decreases, due to the existence of the stray capacitance, when the fet 123 is turned off, the current at both ends of the fet 123 is zero, which is a zero current turn-off ZCS. Thereby achieving zero voltage turn-on ZVS and zero current turn-off ZCS of the first soft switching module 120, thereby reducing switching losses and electromagnetic interference.
The field effect transistor 123 is used as the first soft switch module 120, and stray capacitance of the field effect transistor 123 itself can be used, so that the number of components of the first soft switch module 120 is reduced, and the manufacturing difficulty of the boost converter 10 is reduced.
Of course, the fourth resonant network may also be connected in parallel to the two ends of the fet 123, and the stray capacitance cooperates with the fourth resonant network to implement the zero-voltage turn-on ZVS and the zero-current turn-off ZCS of the first soft switch module 120.
The specific form of the field effect transistor 123 is not limited in the embodiments of the present application, and may be, for example, a metal oxide semiconductor field effect transistor, or a junction gate field effect transistor.
Optionally, the second soft switching module 130 includes a first rectifying element 131 and a second resonant network 132 connected in parallel, and the positive electrode of the dc power source 110 is connected to the positive electrode of the first rectifying element 131.
The first rectifying element 131 and the second resonant network 132 are connected in parallel to form a second soft switching module 130, and when the first rectifying element 131 is turned on, due to the resonance effect of the second resonant network 132, the voltage when the first rectifying element 131 is turned on is zero, so that zero-voltage conduction ZVS of the second soft switching module 130 is realized; when the first rectifying element 131 is turned off, the current is zero when the second rectifying element 141 is turned off due to the resonance effect of the second resonant network 132, so that zero current turn-off ZCS of the second soft switching module 130 is realized.
In an implementation manner of the embodiment of the present application, the third soft switching module 140 includes a second rectifying element 141 and a third resonant network 142 connected in parallel, and a positive electrode of the second rectifying element 141 is connected to a negative electrode of the first rectifying element 131.
Similar to the second soft switching module 130, the third resonant network 142 is connected in parallel with the second rectifying element 141 to implement a zero voltage turn-on ZVS and a zero current turn-off ZCS of the third soft switching module 140.
It should be noted that the first resonant network 122, the second resonant network 132, and the third resonant network 142 are all formed by connecting a resonant capacitor and a resonant inductor in series, the resonant capacitor and the resonant inductor generate resonance, when the switch body is turned off, due to charges stored in the resonant inductor, the current of the switch body is zero when the switch body is turned off, and zero current turn-off ZCS is realized; when the switch body is conducted, due to the current stored in the resonant capacitor, when the switch body is conducted, the voltage of the switch body is zero, and zero-voltage conduction ZVS is realized, wherein the switch body refers to a field effect transistor or a bipolar diode, a second rectifier and a third rectifier.
Optionally, the first rectifying element 131 and the second rectifying element 141 each include a diode.
The diode has unidirectional conductivity, and can be turned on and off by controlling the voltage at two ends of the diode.
In an implementation manner of the embodiment of the present application, the first energy storage module 150 includes an energy storage inductor 151, and the second energy storage module 160 includes an energy storage capacitor 161.
The first energy storage module 150 is provided as an energy storage inductor 151, the second energy storage module 160 is provided as an energy storage capacitor 161, and the energy storage inductor 151 changes slowly in current form through the inductor; the energy storage capacitor 161 is in the form of voltage, the voltage applied across the capacitor changes slowly, the inductor maintains the current and charges the capacitor, so that the capacitor obtains the electric energy supply repeatedly and provides relatively stable voltage continuously.
Optionally, as shown in fig. 2, fig. 3, fig. 4, and fig. 5, when the first soft switching module 120 is closed based on the control signal, the current of the dc power source 110 is supplied to the first energy storage module 150 and the second energy storage module 160 for storing energy, and after the second energy storage module 160 stores energy, the current is transmitted to the output capacitor 170 through the third soft switching module 140.
In an implementation manner of the embodiment of the present application, as shown in fig. 2, fig. 3, fig. 4 and fig. 5, when the first soft switching module 120 is turned off based on the control signal, the third soft switching module 140 enters a reverse zero-current switching mode, the first energy storage module 150 discharges and charges the second energy storage module 160, and after the second energy storage module 160 is fully charged, the second soft switching module 130 is turned off in the zero-current switching mode.
In addition, according to the boost converter 10 provided in the embodiment of the present application, a three-stage cascade boost-dual bridge buck mode is adopted, and an effective transfer function of the circuit is:
where Vo is the voltage across the output capacitor, i.e. the output voltage, V in Is the voltage of the DC power supply, and the input voltage, D is the duty ratio of the control signal of the first soft switch module 120, D , In proportion to the off-time complementary to the duty cycle, D , 1-D, as can be seen from formula (1), the boost converter 10 provided in the embodiment of the present application allows the first soft switching module 120 to operate at a lower duty cycleOperates to achieve the same energy transfer as in the prior art, thereby reducing the transfer loss of the boost converter 10.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A boost converter, comprising: the direct-current power supply comprises a direct-current power supply, a first soft switching module, a second soft switching module, a third soft switching module, a first energy storage module, a second energy storage module and an output capacitor;
the first soft switch module is connected with the first energy storage module in series, the positive electrode of the direct current power supply is connected with the input end of the first soft switch module, and the output end of the first energy storage module is connected with the negative electrode of the direct current power supply; the second soft switching module is connected with the second energy storage module in series, the input end of the second soft switching module is connected with the input end of the first soft switching module, and the output end of the second energy storage module is connected with the output end of the first soft switching module;
the input end of the third soft switch module is connected with the output end of the second soft switch module, the output end of the third soft switch module is connected with the input end of the output capacitor, the output end of the output capacitor is connected with the output end of the first energy storage module, and the two ends of the output capacitor are used as the output of the boost converter.
2. The boost converter according to claim 1, wherein the first soft switching module comprises a bipolar transistor and a first resonant network connected in parallel with the bipolar transistor, an input terminal of the bipolar transistor is connected to an anode of the dc power supply, an output terminal of the bipolar transistor is connected to an input terminal of the first energy storage module, and a signal terminal of the bipolar transistor is connected to a control signal to control on/off of the bipolar transistor according to the control signal.
3. The boost converter according to claim 1, wherein the first soft switching module comprises a field effect transistor, an input terminal of the field effect transistor is connected to the positive electrode of the dc power supply, an output terminal of the field effect transistor is connected to the input terminal of the first energy storage module, and a signal terminal of the field effect transistor is connected to a control signal to control on/off of the field effect transistor according to the control signal.
4. A boost converter according to claim 1, wherein the second soft switching module comprises a first rectifying element and a second resonant network connected in parallel, the positive pole of the dc power supply being connected to the positive pole of the first rectifying element.
5. A boost converter according to claim 4, wherein the third soft switching module comprises a second rectifying element and a third resonant network connected in parallel, the anode of the second rectifying element being connected to the cathode of the first rectifying element.
6. A boost converter according to claim 5, wherein the first rectifying element and the second rectifying element each comprise a diode.
7. A boost converter according to claim 1, wherein the first energy storage module comprises an energy storage inductor and the second energy storage module comprises an energy storage capacitor.
8. A boost converter according to any one of claims 1-7, characterized in that when said first soft switching module is closed based on a control signal, the current of said DC power supply is supplied to said first energy storage module and said second energy storage module for storing energy, and after said second energy storage module stores energy, the current is transmitted to said output capacitor through said third soft switching module.
9. A boost converter according to any of claims 1-7, characterized in that when said first soft switching module is switched off based on a control signal, said third soft switching module enters a reverse zero current switching, said first energy storage module discharges and charges said second energy storage module, and after said second energy storage module is fully charged, said second soft switching module is switched off in a zero current switching mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211587641.2A CN115603572B (en) | 2022-12-12 | 2022-12-12 | Boost converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211587641.2A CN115603572B (en) | 2022-12-12 | 2022-12-12 | Boost converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115603572A true CN115603572A (en) | 2023-01-13 |
| CN115603572B CN115603572B (en) | 2023-04-28 |
Family
ID=84852896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211587641.2A Active CN115603572B (en) | 2022-12-12 | 2022-12-12 | Boost converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115603572B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923152A (en) * | 1997-02-20 | 1999-07-13 | Astec International Limited | Power factor correction circuit with soft switched boost converter |
| CN2602543Y (en) * | 2002-11-08 | 2004-02-04 | 钱龙圣 | Soft switch circuit without depletion absorption |
| CN1564448A (en) * | 2004-04-13 | 2005-01-12 | 浙江大学 | Composite active clamped single-phase A.C-D.C power factor correction transformer |
| US20060226816A1 (en) * | 2005-04-11 | 2006-10-12 | Yuan Ze University | Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor |
| US20070216390A1 (en) * | 2006-03-17 | 2007-09-20 | Yuan Ze University | High-efficiency high-voltage difference ratio bi-directional converter |
| CN114123763A (en) * | 2021-10-29 | 2022-03-01 | 江苏大学 | Low-ripple soft switching Cuk converter circuit and modulation method |
-
2022
- 2022-12-12 CN CN202211587641.2A patent/CN115603572B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923152A (en) * | 1997-02-20 | 1999-07-13 | Astec International Limited | Power factor correction circuit with soft switched boost converter |
| CN2602543Y (en) * | 2002-11-08 | 2004-02-04 | 钱龙圣 | Soft switch circuit without depletion absorption |
| CN1564448A (en) * | 2004-04-13 | 2005-01-12 | 浙江大学 | Composite active clamped single-phase A.C-D.C power factor correction transformer |
| US20060226816A1 (en) * | 2005-04-11 | 2006-10-12 | Yuan Ze University | Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor |
| US20070216390A1 (en) * | 2006-03-17 | 2007-09-20 | Yuan Ze University | High-efficiency high-voltage difference ratio bi-directional converter |
| CN114123763A (en) * | 2021-10-29 | 2022-03-01 | 江苏大学 | Low-ripple soft switching Cuk converter circuit and modulation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115603572B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108448913B (en) | Single-stage isolated AC-DC converter based on staggered parallel bridgeless PFC circuit and LLC resonance | |
| CN110932557A (en) | High-gain quasi-resonant DC-DC converter based on voltage doubling rectifying circuit | |
| CN114629349B (en) | Improved high-frequency high-step-up ratio SEPIC converter based on switching inductance | |
| CN209948956U (en) | Voltage reduction circuit and electronic equipment | |
| CN215934730U (en) | DC-DC converter with high step-up ratio | |
| Wang et al. | High efficiency high step-up isolated dc-dc converter for photovoltaic applications | |
| Hsieh et al. | An interleaved bidirectional DC-DC converter with zero-voltage-switching | |
| CN216794864U (en) | Bidirectional DC-DC converter | |
| CN112953240B (en) | High-gain energy storage buck converter based on coupling inductance | |
| CN115603572B (en) | Boost converter | |
| CN212367151U (en) | Inverter circuit | |
| CN111682777B (en) | Secondary parallel LCD forward converter capable of avoiding reverse charging of energy storage capacitor | |
| Akhlaghi et al. | High step-up quasi-resonant converter with low number of components | |
| CN108448892B (en) | Quadratic form is many times presses unit DC-DC converter for photovoltaic system | |
| CN114915173A (en) | Flexible cutting type power converter | |
| CN111555648A (en) | Inverter circuit | |
| TWI742997B (en) | Soft-switching power converter | |
| Wang et al. | A ZVS Buck/Boost Converter with Coupled-Filter-Inductor | |
| CN216531076U (en) | Single-switch-tube high-gain DC/DC converter | |
| CN220457296U (en) | High-efficiency boosting DC-DC converter | |
| CN214384888U (en) | Monopole frequency multiplication voltage type SPWM soft switch DCAC inverter | |
| CN113258772B (en) | Secondary buck-boost converter adopting switch inductor | |
| CN218526237U (en) | Buck-boost conversion circuit and switching power supply | |
| CN215186467U (en) | Interleaved BUCK converter for realizing soft switching based on auxiliary circuit | |
| CN116827126B (en) | High-gain boost converter |
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 |