CN114759790A - Novel quadratic form converter - Google Patents

Novel quadratic form converter Download PDF

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CN114759790A
CN114759790A CN202210349336.3A CN202210349336A CN114759790A CN 114759790 A CN114759790 A CN 114759790A CN 202210349336 A CN202210349336 A CN 202210349336A CN 114759790 A CN114759790 A CN 114759790A
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switch tube
inductor
voltage
capacitor
diode
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CN114759790B (en
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刘保菊
高铁梁
朱高中
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Pingdingshan University
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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
    • 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

The invention discloses a novel quadratic converter, wherein the anode of a direct current power supply is respectively connected with the anode of a first capacitor and the first end of a first switch tube, the second end of the first switch tube is respectively connected with the first end of a first inductor and the cathode of a first diode, the second end of the first inductor is connected with the cathode of the direct current power supply, the cathode of the first capacitor is respectively connected with the anode of the first diode and the first end of a second switch tube, the second end of the second switch tube is respectively connected with the first end of a second inductor and the anode of a second diode, the cathode of the second diode is respectively connected with the anode of a second capacitor and the first end of a load resistor, the second end of the second inductor, the negative pole of the second capacitor and the second end of the load resistor are both connected with the negative pole of the direct-current power supply, so that the current continuity of the input port is ensured, and meanwhile, the use number of components and parts is reduced, and the power loss is reduced.

Description

Novel quadratic form converter
Technical Field
The invention belongs to the technical field of converters, and particularly relates to a novel quadratic converter.
Background
Dc switching converters are widely used in many fields such as power, communication systems, renewable energy systems, home appliances, industrial equipment, railways, and aviation, and common dc converters include boost converters, buck converters, and buck-boost converters.
The buck-boost converter is focused and applied due to the fact that the buck-boost converter has high buck-boost capacity, the buck-boost converter in the prior art comprises a quadratic buck-boost converter with positive output voltage and a single-switch quadratic buck-boost converter, the quadratic buck-boost converter with the positive output voltage is usually discontinuous in input and output current, the converter with the discontinuous input current is not suitable for renewable energy application, the discontinuous output current can increase current stress and output voltage ripple on an output capacitor, the application range of the converter is limited, the number of elements used by the single-switch quadratic buck-boost converter is large, particularly the number of diodes is relatively high, and circuit topology is complex and power loss is high.
Therefore, how to ensure the continuity of the input port current, and reduce the number of components and power consumption at the same time is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to ensure the continuity of the current of an input port, reduce the use number of components and reduce power loss, and provides a novel quadratic converter.
The technical scheme of the invention is as follows: a novel quadratic converter comprising:
the direct current power supply comprises a direct current power supply, a first switch tube, a second switch tube, a first diode, a second diode, a first inductor, a second inductor, a first capacitor, a second capacitor and a load resistor;
wherein, the positive pole of the direct current power supply is respectively connected with the positive pole of the first capacitor and the first end of the first switch tube, the second end of the first switch tube is respectively connected with the first end of the first inductor and the cathode of the first diode, the second end of the first inductor is connected with the negative electrode of the direct current power supply, the negative electrode of the first capacitor is respectively connected with the positive electrode of the first diode and the first end of the second switch tube, the second end of the second switch tube is respectively connected with the first end of the second inductor and the anode of the second diode, the cathode of the second diode is respectively connected with the anode of the second capacitor and the first end of the load resistor, and the second end of the second inductor, the negative electrode of the second capacitor and the second end of the load resistor are connected with the negative electrode of the direct-current power supply.
Further, the first switching tube and the second switching tube have synchronized switching times.
Further, the voltage gain M of the quadratic converter is:
Figure BDA0003578786180000021
in the formula, ViIs the voltage of the DC power supply, VoAnd D is the duty ratio of the first switch tube or the second switch tube.
Further, the boundary inductance value of the first inductor and the second inductor in the quadratic converter should satisfy the following condition:
Figure BDA0003578786180000022
in the formula, L1BIs a boundary inductance value, L, of the first inductor2BIs the boundary inductance value of the second inductor, D is the duty ratio of the first switch tube or the second switch tube, RLIs a load resistance, fsIs the switching frequency.
Further, the voltage stress V of the first switch tube in the quadratic converters1And voltage stress V of the second switching tubeS2The following conditions are satisfied:
Figure BDA0003578786180000023
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
Further, the voltage stress V of the first diode in the quadratic converterD1And the second diodeCompressive stress VD2The following conditions are satisfied:
Figure BDA0003578786180000024
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
Compared with the prior art, the invention has the following beneficial effects:
the invention comprises the following steps: the direct current power supply comprises a direct current power supply, a first switch tube, a second switch tube, a first diode, a second diode, a first inductor, a second inductor, a first capacitor, a second capacitor and a load resistor; wherein an anode of the dc power supply is connected to an anode of the first capacitor and a first end of the first switch tube, a second end of the first switch tube is connected to a first end of the first inductor and a cathode of the first diode, a second end of the first inductor is connected to a cathode of the dc power supply, a cathode of the first capacitor is connected to an anode of the first diode and a first end of the second switch tube, a second end of the second switch tube is connected to a first end of the second inductor and an anode of the second diode, a cathode of the second diode is connected to an anode of the second capacitor and a first end of the load resistor, and a second end of the second inductor, a cathode of the second capacitor and a second end of the load resistor are connected to a cathode of the dc power supply, the current continuity of the input port is ensured, and meanwhile, the use number of components and the power loss are reduced.
Drawings
Fig. 1 is a schematic structural diagram of a novel quadratic converter provided in an embodiment of the present invention;
FIG. 2 is a schematic equivalent circuit diagram of a quadratic converter according to an embodiment of the present invention;
fig. 3 is an equivalent circuit diagram of a quadratic converter in mode two according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present application, and not all of the embodiments. 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.
The present application provides a novel quadratic form converter, as shown in fig. 1, which is a schematic structural diagram of the novel quadratic form converter provided in the embodiments of the present application, the quadratic form converter includes:
DC power supply and first switch tube S1A second switch tube S2A first diode D1A second diode D2A first inductor L1A second inductor L2A first capacitor C1A second capacitor C2And a load resistance RL；
Wherein, the positive pole of the DC power supply is respectively connected with the positive pole of the first capacitor and the first end of the first switch tube, the second end of the first switch tube is respectively connected with the first end of the first inductor and the cathode of the first diode, the second end of the first inductor is connected with the negative electrode of the direct current power supply, the negative electrode of the first capacitor is respectively connected with the positive electrode of the first diode and the first end of the second switch tube, the second end of the second switch tube is respectively connected with the first end of the second inductor and the anode of the second diode, the cathode of the second diode is respectively connected with the anode of the second capacitor and the first end of the load resistor, and the second end of the second inductor, the negative electrode of the second capacitor and the second end of the load resistor are connected with the negative electrode of the direct-current power supply.
In the embodiment of the present application, the first switching tube and the second switching tube have synchronous switching time, and the voltage gain M of the quadratic converter is:
Figure BDA0003578786180000031
in the formula, ViIs the voltage of the DC power supply, VoAnd D is the duty ratio of the first switching tube or the second switching tube.
In the embodiment of the present application, the boundary inductance values of the first inductor and the second inductor in the quadratic converter need to satisfy the following condition:
Figure BDA0003578786180000041
in the formula, L1BIs a boundary inductance value, L, of the first inductor2BIs the boundary inductance value of the second inductor, D is the duty ratio of the first switch tube or the second switch tube, RLIs a load resistance, fsIs the switching frequency.
Specifically, the switching tube comprises a first switching tube and a second switching tube, and the period of the switching tube is TsWith a switching frequency of fsThe switching frequency is far greater than the characteristic frequency of the converter, and the first switching tube and the second switching tube have synchronous switching time.
The converter comprises two modes, wherein the first mode is that the first switching tube and the second switching tube are synchronously conducted, and the input voltage of the converter is also the voltage V of the direct current power supplyiThe current of the first inductor linearly rises and is cut off due to the first diode receiving the reverse bias voltage of the first capacitor, and at the same time, the energy stored in the first capacitor and the input voltage are the second inductor energy together, the second inductor current linearly rises, the second diode receives the reverse bias voltage of the second capacitor and is cut off, the output energy is provided by the second capacitor, therefore, a corresponding equation can be established according to the working principle of the stage as
Figure BDA0003578786180000042
In the formula, diL1For flowing through the inductance L1The amount of current change of (d), diL2For flowing through the inductance L2Dt is the time variation of the switching tube, dVC1Is a capacitor C1Of voltage change, dVC2Is a capacitor C2The voltage variation amount of (2).
In the second mode, the first switching tube and the second switching tube are synchronously turned off, the first diode and the second diode are turned on due to the bearing of forward voltage, the energy stored in the first inductor and the input voltage jointly charge the first capacitor through the first diode, meanwhile, the energy stored in the second inductor is output to the second capacitor and the load resistor through the second diode, and the equation of the converter in the second mode is as follows:
Figure BDA0003578786180000043
based on the above equations (7) and (8), the equilibrium distance is obtained from volt-seconds:
Figure BDA0003578786180000044
the voltage gain of the converter can be obtained according to the formula (9), namely, the formula (10), and it can be determined through the formula (10) that the converter is in a boost state when the duty ratio of the switching tube is greater than 0.5, and the converter is in a buck state when the duty ratio of the switching tube is less than 0.5.
In the embodiment of the application, the voltage stress V of the first switch tube in the quadratic converterS1And voltage stress V of the second switching tubeS2The following conditions are satisfied:
Figure BDA0003578786180000045
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
In the embodiment of the application, the voltage stress V of the first diode in the quadratic converterD1And voltage stress V of the second diodeD2The following conditions are satisfied:
Figure BDA0003578786180000051
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
Provided with an inductor L1、L2Δ i for ripple current ofL1、ΔiL2Expressing that the inductance L can be obtained from the formula (10)1、L2The ripple current expression is as follows:
Figure BDA0003578786180000052
as can be seen from equation (12), the current ripple and the input voltage or the output voltage, the duty ratio D, and the switching frequency f are measured at the inductor currentsThe inductance value can be selected as appropriate for the application under known conditions.
The flow inductance L is set by the formulas (10) and (11)1、L2Is an average current IL1、IL2According to the ampere-second balance principle, the inductance L can be obtained1、L2Has an average current of
Figure BDA0003578786180000053
When the converter operates in critical condition mode (BCM), the minimum current through the inductor is equal to zero, setting the current through the inductor L1、L2Minimum current of (I)L1V、IL2VThe inductance L can be obtained from the equations (12) and (13)1、L2Respectively, of
Figure BDA0003578786180000054
According to the formula (14), based on the flow inductance L1、L2Is equal to zero, the inductance L can be derived1、L2Boundary inductance value L of1B、L2BThe following conditions must be satisfied
Figure BDA0003578786180000061
From the formula (15), when L is1>L1B，L2>L2BThe proposed novel quadratic Buck-Boost converter operates in CCM (Continuous Conduction Mode), otherwise in DCM (Discontinuous Conduction Mode).
Switch tube S1、S2The voltage stress borne by the voltage stress is a switch tube S1、S2When the switch is turned off, the voltage across the switch tube S is known from the second mode1、S2Stress of voltage VS1、VS2Is composed of
Figure BDA0003578786180000062
From the foregoing analysis, diode D can be obtained by the same method1、D2The voltage stress is the voltage stress borne by the diode in the cut-off state, and the diode D is arranged1、D2Stress at voltage of VD1、VD2
Figure BDA0003578786180000063
(b) Switching device current stress analysis
Provided with a switch tube S1、S2Current stress of IS1、IS2By a switching tube S1、S2The currents flowing through the switching tubes in the conducting state can respectively obtain the available switching tubes S1、S2Stress of current IS1、IS2Is composed of
Figure BDA0003578786180000064
Diode D obtained by the same method1、D2、D3Current stress I ofD1、ID2Is composed of
Figure BDA0003578786180000065
3) Capacitor ripple voltage analysis
Provided with a capacitor C1、C2The output ripple voltage is respectively delta VC1、ΔVC2From the analysis of the formula (10), the capacitance C1、C2Output ripple voltage of
Figure BDA0003578786180000066
As can be seen from the equation (20), when the output voltage, the capacitance C1、C2Duty ratio D, switching frequency fsAnd a load RLThe capacitance C can be calculated1、C2Ripple voltage of the output, similarly known as C1、C2The capacitance C can also be obtained when the ripple is output and other conditions1、C2A capacitance value.
In order to simplify the efficiency analysis, the invention ignores the influence of the ripple current of the inductor and the capacitor on the efficiency analysis. Considering the equivalent resistance of the inductor and the switching device and the voltage drop of the switching device, rL1、rL2Respectively representInductor L1、L2Equivalent resistance of rS1、rS2Respectively show the switch tubes S1、S2The parasitic resistance of (1). VF1、VF2Representing a diode D1、D2The threshold voltage of (d). r isD1、rD2Respectively represent a diode D1、D2The parasitic resistance of (a) is greater than,
switch tube S1、S2Conduction loss P ofsw(on)Is composed of
Figure BDA0003578786180000071
Switch tube S1、S2Turn-off loss P ofsw(off)Is composed of
Figure BDA0003578786180000072
Provided with an inductor L1、L2Has a power loss of PLObtaining P according to the principleL
Figure BDA0003578786180000073
Provided with a diode D1、D2Power loss of PDObtaining P according to the principleD
Figure BDA0003578786180000074
Efficiency eta of the converter1Can be expressed as
Figure BDA0003578786180000075
The loss of the quadratic converter of the present application can be calculated by expressions (21) to (24), and the efficiency of the quadratic converter of the present application can be calculated from expression (25) by calculating the loss of each part.
Establishing a small signal model equation according to a state space average method to obtain
Figure BDA0003578786180000081
In the formula (26), the reaction mixture is,<iL1>、<iL2>、<vC1>、<v0>respectively represent iL1、iL2、vC1、v0The average component, d, represents the duty cycle under the small signal model.
When the average variable of each parameter is decomposed, the average variable can be decomposed into the sum of a direct current component and an alternating current small signal component<iL1>、<iL2>、<iL3>、<vC1>、<vC>、<v0>Is decomposed as follows
Figure BDA0003578786180000082
In the formula (27), IL1、IL2、IL3、VC1、、V0Respectively represent<iL1>、<iL2>、<vC1>、<v0>The direct-current component of (a) is,
Figure BDA0003578786180000083
respectively represent<iL1>、<iL2>、<vC1>、<v0>Of the ac small signal component.
Substituting the equation (27) into the equation (26), separating the disturbance, and obtaining the small signal model of the quadratic Buck-Boost converter as
Figure BDA0003578786180000084
The transfer function of the control-output of the converter can be solved according to the small-signal mathematical model of the converter of equation (28).
To verify the correctness of the theoretical analysis of the quadratic converter proposed above, experimental verification is performed below. The circuit parameters given are as follows: vi＝24V,fs＝50kHz，D＝0.4-0.6，RL＝30-150Ω，L1＝470μH，L2＝330μH，C1＝22μF，C247 muf. And establishing a simulation system model of the quadratic form converter circuit by utilizing PSIM software. It can be determined that the output voltage V is 0.6 when the duty ratio D is equal to0Capacitor C1Voltage of, drive pulse signal VgInductor L1、L2Current waveform diagram of (2). Due to the switch tube S1、S2With synchronized switching states, in which only one drive pulse signal is selected, determinable from the simulated waveform, the capacitor voltage VC1Has a value in the range of (59.18V-60.65V), and outputs a voltage V0Value in the range of (53.9V-54.20V), and inductor current iL1In (3.74A, 4.36A), the inductor current iL2Within (2.05A, 3.38A). Thereby obtaining an inductor L1、L2Ripple Δ i of currentL1、ΔiL20.62A and 1.33A, respectively. Capacitor C1、C2Output ripple voltage Δ VC1、ΔVC21.47V and 0.28V, respectively. V is obtained from the formulae (9), (12) and (20)0＝54V、ΔiL1＝0.61A、ΔiL2＝1.31A
ΔVC1＝1.47V、ΔVC20.28V. When the duty ratio D is 0.4, the novel quadratic converter operates in a buck mode. It can be determined that the output voltage V when the duty ratio D is 0.40Capacitor C1Voltage of, drive pulse signal VgInductor L1、L2Current waveform diagram of (a). From the determined simulation waveform, the capacitor voltage V can be determinedC1Has a value in the range of (39.92V-40.05V), and an output voltage V0The value is in the range of (10.64V-10.67V), and the inductive current iL1In (0.033A, 0.441A), the inductor current iL2Within (0.161A, 0.549A). From the determined simulation waveform, the inductance L can be determined1、L2Ripple Δ i of currentL1、ΔiL20.408A and 0.388A, respectively. Capacitor C1、C2Output ripple voltage Δ VC1、ΔVC20.13V and 0.03V, respectively. Can obtain V simultaneously0＝10.66V、ΔiL1＝0.408A、ΔiL2＝0.388A、ΔVC1＝0.13V、ΔVC2＝0.036V。
From the comparison, the PSIM simulation analysis is consistent with the theoretical analysis, and the simulation experiment proves the correctness of the theoretical analysis.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto and changes may be made without departing from the scope of the invention in its aspects.

Claims (6)

1. A novel quadratic converter, characterized in that it comprises:
the direct current power supply comprises a direct current power supply, a first switch tube, a second switch tube, a first diode, a second diode, a first inductor, a second inductor, a first capacitor, a second capacitor and a load resistor;
wherein, the positive pole of the DC power supply is respectively connected with the positive pole of the first capacitor and the first end of the first switch tube, the second end of the first switch tube is respectively connected with the first end of the first inductor and the cathode of the first diode, the second end of the first inductor is connected with the negative electrode of the direct current power supply, the negative electrode of the first capacitor is respectively connected with the positive electrode of the first diode and the first end of the second switch tube, the second end of the second switch tube is respectively connected with the first end of the second inductor and the anode of the second diode, the cathode of the second diode is respectively connected with the anode of the second capacitor and the first end of the load resistor, and the second end of the second inductor, the negative electrode of the second capacitor and the second end of the load resistor are connected with the negative electrode of the direct-current power supply.
2. A novel quadratic converter according to claim 1, characterized in that the first switching tube and the second switching tube have synchronized switching times.
3. A novel quadratic converter according to claim 2, characterized in that the voltage gain M of the quadratic converter is:
Figure FDA0003578786170000011
in the formula, ViIs the voltage of the DC power supply, VoAnd D is the duty ratio of the first switch tube or the second switch tube.
4. A novel quadratic converter according to claim 2, characterized in that the boundary inductance values of the first and second inductors of the quadratic converter satisfy the following condition:
Figure FDA0003578786170000012
in the formula, L1BIs a boundary inductance value, L, of the first inductor2BIs the boundary inductance value of the second inductor, D is the duty ratio of the first switch tube or the second switch tube, RLIs a load resistance, fsIs the switching frequency.
5. A novel quadratic converter in accordance with claim 2, characterized by the voltage stress V of the first switching tube in said quadratic converterS1And the voltage of the second switch tubeForce VS2The following conditions are satisfied:
Figure FDA0003578786170000013
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
6. A novel quadratic converter according to claim 2, characterized in that the voltage stress V of the first diode in the quadratic converterD1And voltage stress V of the second diodeD2The following conditions are satisfied:
Figure FDA0003578786170000021
in the formula, VC1Is the voltage value of the first capacitor, D is the duty ratio of the first switch tube or the second switch tube, ViIs the voltage of the DC power supply, V0Is the output voltage of the load resistor.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809096A (en) * 2018-06-08 2018-11-13 西安空间无线电技术研究所 A kind of square high gain boost/buck-boost converter for wide bus ranges
CN112953205A (en) * 2021-03-26 2021-06-11 哈尔滨理工大学 Improved ripple-free buck-boost DC-DC converter
CN113824311A (en) * 2021-09-23 2021-12-21 哈尔滨理工大学 Wide buck-boost range DC-DC converter for fuel cell vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809096A (en) * 2018-06-08 2018-11-13 西安空间无线电技术研究所 A kind of square high gain boost/buck-boost converter for wide bus ranges
CN112953205A (en) * 2021-03-26 2021-06-11 哈尔滨理工大学 Improved ripple-free buck-boost DC-DC converter
CN113824311A (en) * 2021-09-23 2021-12-21 哈尔滨理工大学 Wide buck-boost range DC-DC converter for fuel cell vehicle

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