CN113098245B - Boost conversion circuit and converter for realizing input and output low ripple waves - Google Patents

Boost conversion circuit and converter for realizing input and output low ripple waves Download PDF

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Publication number
CN113098245B
CN113098245B CN202110377737.5A CN202110377737A CN113098245B CN 113098245 B CN113098245 B CN 113098245B CN 202110377737 A CN202110377737 A CN 202110377737A CN 113098245 B CN113098245 B CN 113098245B
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power switch
switch tube
input
power
output
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CN113098245A (en
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罗朋
郭磊
刘大召
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Guangdong Ocean University
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Guangdong Ocean 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention provides a boost conversion circuit and a converter for realizing input and output low ripples, relates to the technical field of power electronic conversion, and solves the problems of reducing input and output ripples and voltage conversion at the same time.

Description

Boost conversion circuit and converter for realizing input and output low ripple waves
Technical Field
The invention relates to the technical field of power electronic conversion, in particular to a boost conversion circuit and a boost conversion converter for realizing input and output low ripples.
Background
With the rapid development of society, in order to solve the problems of energy shortage and environmental pollution, new green energy sources such as solar energy and wind energy are widely researched, and the reasonable development and utilization of the green renewable energy sources become urgent needs of human beings, and power electronic conversion technology cannot be used in occasions such as solar power generation and wind power generation. In the power electronic conversion process, no matter the input end or the output end, voltage or current fluctuation phenomenon can exist, when output current fluctuates, high ripple of the output voltage Vo can be caused, the essence generated by the output voltage Vo ripple is due to voltage changes at two ends of a magnetic component of the output end, and further the current fluctuation is caused, due to the existence of the high ripple, a capacitor with large capacity is needed, the fluctuation of the output voltage Vo is stabilized within an acceptable range, when the fluctuation range of the input current is large, the service life of new energy sources such as photovoltaic and fuel cells is influenced, if the converter can realize input and output ultralow ripple, the output capacitor can be reduced, and the service life of the new energy sources such as photovoltaic and fuel cells can be prolonged.
At present, in the field of power electronic conversion, a main low ripple converter is concentrated on an output ultralow ripple converter or an input ultralow ripple converter, and the structure of the converter which only simply realizes the output ultralow ripple or the input ultralow ripple is very complex, for example, on the level of realizing the output ultralow ripple, 5 months and 10 days in 2017, the invention patent in china (CN106655742A) discloses an ultralow ripple circuit control device, which realizes the output of the ultralow ripple by using some feedback detection modules and regulation modules, and in addition, some schemes realize the purpose of ultralow ripple output by adding transformer magnetic column structures, and the structures proposed by the schemes are complex; in the aspect of realizing input ultra-low ripple, on the 10 th and 17 th in 2017, the invention patent in china (CN104022632A) discloses an input zero ripple converter, in which two identical BOOST converters are connected in parallel (or two identical SEPIC converters are connected in parallel), so that trigger circuits of the two identical BOOST converters are simultaneously in a push-pull-trigger state, and input triangular current waveforms of the two converters are different by half a cycle in time, so that the current supplied by a direct-current power supply is a constant direct current without ripple, and the purpose of ultra-low ripple input can be realized, but the control is relatively complex. Meanwhile, to realize the input and output ultra-low ripple, an input end of the output ultra-low ripple converter is connected with an input ultra-low ripple converter, so that the size and cost of the converter are increased, the efficiency is reduced, and in addition, some important conversion occasions also relate to the requirement on the voltage size.
In order to simultaneously achieve the purpose of reducing input and output ripples, in 2017, 5/17 th, a chinese invention patent (CN106685223A) discloses a high-efficiency low-ripple bidirectional Cuk conversion circuit, in which a buck Cuk conversion circuit and a boost Cuk conversion circuit are used in combination, and an original Cuk converter is combined into a bidirectional converter, and in addition, an input end and an output end have an inductor respectively, so that the input and output current has small pulsation, and the purpose of reducing input and output ripples is achieved.
Disclosure of Invention
In order to solve the problem of reducing input and output ripples and converting voltage, the invention provides a boost conversion circuit and a converter for realizing input and output low ripples, so that input and output current realizes ultra-low ripples, output voltage is improved, and the boost conversion requirement of input and output ultra-low ripples in application is met.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a boost converter circuit for realizing low input-output ripple comprises: DC input power supply VinEnergy storage inductor L1A first power switch tube S1A second power switch tube S2A first power diode D1A second power diode D2Follow current inductor L2A first capacitor C1And an output circuit unit; DC input power supply VinThe anode of the capacitor is connected with an energy storage inductor L1One end of (1), energy storage inductor L1The other ends of the first and second power switch tubes are respectively connected with a first power switch tube S1Drain electrode of the first power switch tube S2And a first power diode D1The anode of (1); first power diode D1The cathodes of the two inductors are respectively connected with a follow current inductor L2And a first capacitor C1One end of (1), a follow current inductor L2The other end of the first capacitor C is connected with the input end of the output circuit unit1The other ends of the first and second power switch tubes are respectively connected with a second power switch tube S2And the anode of the second power diode; the DC input power supply VinNegative pole of (1), first power switch tube S1Source electrode of, second power diode D2The cathode and the output end of the output circuit unit are both grounded; first power switch tube S1And a second power switch tube S2The grid electrodes of the first power switch tube S are all connected with an external driving signal1And a second power switch tube S2In the same switching period TsAt the first power switch tube S, with simultaneous internal conduction or simultaneous turn-off1And a second power switch tube S2When simultaneously on or simultaneously off, the energy storage inductor L1Storing electricityCan output power higher than the DC input power VinThe output voltage Vo of the input voltage.
Preferably, the output circuit unit includes a second capacitor CoAnd a load resistor R, the second capacitor CoIn parallel with the load resistor R.
Preferably, the boost converter circuit for realizing low input-output ripple is used for one switching period TsThe method comprises two working processes: first power switch tube S1And a second power switch tube S2Working process during simultaneous conduction and first power switch tube S1And a second power switch tube S2And simultaneously, the working process when the power is turned off.
Preferably, the switching period TsHas a time interval of t0～t2Wherein, t0Indicating the switching period TsStart time of (t)2Indicating the switching period TsEnd time of (1), set t1Indicating the first power switch tube S1And a second power switch tube S2Setting a first power switch tube S at the end time point of the working process when the two are simultaneously conducted1And a second power switch tube S2When the time duty ratio of the working process is D, the first power switch tube S1And a second power switch tube S2The working process time interval is DT during simultaneous conductionsIs denoted by t0～t1(ii) a Provided with a first power switch tube S1And a second power switch tube S2The time duty ratio of the working process when the power is turned off at the same time is 1-D, then the first power switch tube S1And a second power switch tube S2The working process time interval when simultaneously switched off is (1-D) TsIs denoted by t1～t2。
Preferably, the energy storage inductor L1And follow current inductance L2The inductance values of (a) and (b) are the same.
Preferably, a first power switch tube S is provided1Is vgs1Second power switch tube S2Is vgs2In the switching period TsT in0～t1When (2) is in contact withPeriod of time, vgs1And vgs2All are high level, the first power switch tube S1And a second power switch tube S2Simultaneous on, DC input source VinProviding energy, generating a first current i at the positive electrodeL1Sequentially flows through the energy storage inductor L1A first power switch tube S1Back to the DC input power supply VinNegative electrode of (1), energy storage inductor L1Storing energy; a first capacitor C1Supplying energy from the first capacitor C1Of the anode ofL2Sequentially flows through the follow current inductor L2A second capacitor CoA load resistor R, a first power switch tube S1And a second power switch tube S2Flows into the first capacitor C1At this time the first capacitor C1Release energy, follow current inductance L2Energy storage, second capacitor CoEnergy is stored, and the load resistor R consumes energy.
Preferably, during the switching period TsT in1～t2Period of time of vgs1And vgs2All at low level, the first power switch tube S1And a second power switch tube S2Simultaneous turn-off, DC input supply VinProviding energy, generating a first current i at the positive electrodeL1Sequentially flows through the energy storage inductor L1And a first power diode D1In the first power diode D1In which a part of the current passes through the first capacitor C in turn1A second power diode D2Inflow DC input power supply VinAnother part of the current iL2By means of a follow current inductance L2Then respectively flows into the second capacitors CoAnd a load resistor R flowing into the DC input power supply VinThe negative electrode of (1).
Preferably, the first power switch tube S1And a second power switch tube S2An MOS tube is adopted.
Preferably, the first power switch tube S1And a second power switch tube S2An IGBT tube is adopted.
The invention also provides a boost converter for realizing input and output low ripples, which comprises the boost conversion circuit for realizing input and output low ripples.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
(1) the boost conversion circuit for realizing input and output low ripples has the advantages of simple structure, no need of matching of components with complex structures and low cost.
(2) The boost conversion circuit for realizing input and output low ripple waves comprises two power switching tubes which are simultaneously switched on or switched off, so that the boost conversion circuit is convenient to control on a trigger level, and also comprises an energy storage inductor and a follow current inductor, so that the input and output current can realize ultra-low ripple waves under the condition that the power switching tubes are simultaneously switched on or switched off, the problem that an input ultra-low ripple wave converter is required to be connected to an input end in the traditional condition is solved, and the cost and the volume of the converter are reduced.
(3) When the two power switching tubes are simultaneously conducted or simultaneously turned off, the energy storage inductor stores electric energy, the follow current inductor performs follow current, the output circuit unit outputs output voltage Vo higher than input voltage, and the requirement of boosting conversion during input and output of ultra-low ripple waves in various applications is met.
Drawings
Fig. 1 is a schematic diagram of a boost converter circuit for realizing low input-output ripple according to an embodiment of the present invention;
FIG. 2 shows a first power switch S according to an embodiment of the present invention1Drive signal vgs1And a second power switch tube S2Drive signal vgs2A waveform diagram of a signal during one switching period;
fig. 3 is a mode diagram of an operation process of the boost converter circuit with low input-output ripple according to the embodiment of the present invention;
fig. 4 is a mode diagram illustrating another operation process of the boost converter circuit with low input-output ripple according to the embodiment of the present invention;
fig. 5 is a waveform diagram showing simulation results of the boost circuit for realizing low input-output ripple according to the embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for better illustration of the present embodiment, certain parts of the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions;
it will be understood by those skilled in the art that certain well-known descriptions of the figures may be omitted.
The positional relationships depicted in the drawings are for illustrative purposes and are not to be construed as limiting the present patent;
the technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Examples
The boost converter circuit for realizing low input-output ripple shown in fig. 1, referring to fig. 1, comprises: DC input power supply VinEnergy storage inductor L1A first power switch tube S1A second power switch tube S2A first power diode D1A second power diode D2Follow current inductor L2A first capacitor C1And an output circuit unit 1; DC input power supply VinThe anode of the capacitor is connected with an energy storage inductor L1One end of (1), energy storage inductor L1The other ends of the first and second power switch tubes are respectively connected with a first power switch tube S1Drain electrode of the first power switch tube S2And a first power diode D1The anode of (1); first power diode D1The cathodes of the two inductors are respectively connected with a follow current inductor L2And a first capacitor C1One end of (1), a follow current inductor L2The other end of the first capacitor C is connected with the input end of the output circuit unit 11The other ends of the first and second power switch tubes are respectively connected with a second power switch tube S2And the anode of the second power diode; the DC input power supply VinNegative pole of (1), first power switch tube S1Source electrode of, second power diode D2The cathode of the output circuit unit 1 and the output end of the output circuit unit 1 are both grounded; first power switch tube S1And a second power switch tube S2The grid electrodes of the first power switch tube S are all connected with an external driving signal1And a second power switch tube S2In the same switching period TsThe inner part is simultaneously conducted or simultaneously turned off, so that the trigger conduction sequence of different switch tubes does not need to be considered during actual implementation, the control is convenient at the trigger layer, the use efficiency is higher, and the first power switch tube S is1And a second power switch tube S2When simultaneously on or simultaneously off, the energy storage inductor L1The output circuit unit 1 outputs the electric energy which is higher than the DC input power supply VinThe output voltage Vo of the input voltage.
In this embodiment, the output circuit unit 1 includes a second capacitor CoAnd a load resistor R, the second capacitor CoIn parallel with the load resistor R.
First power switch tube S1And a second power switch tube S2In the same switching period TsThe internal and the external are simultaneously conducted or simultaneously turned off, thereby realizing the boost conversion circuit with low input and output ripples in one switching period TsThe method comprises two working processes: first power switch tube S1And a second power switch tube S2Working process during simultaneous conduction and first power switch tube S1And a second power switch tube S2And simultaneously, the working process when the power is turned off.
As shown in fig. 2, the abscissa of fig. 2 represents time, and the ordinate represents the first power switch tube S1Drive signal vgs1And a second power switch tube S2Drive signal vgs2(since both signals are on at the same time, they can be represented on one axis at the same time), and the switching period TsHas a time interval of t0～t2Wherein, t0Indicating the switching period TsStart time of (t)2Indicating the switching period TsEnd time of (1), set t1Indicating the first power switch tube S1And a second power switch tube S2Setting a first power switch tube S at the end time point of the working process when the two are simultaneously conducted1And a second power switch tube S2When the time duty ratio of the working process is D, the first power switch tube S1And a second powerSwitch tube S2The working process time interval is DT during simultaneous conductionsIs denoted by t0～t1(ii) a Provided with a first power switch tube S1And a second power switch tube S2The time duty ratio of the working process when the power is turned off at the same time is 1-D, then the first power switch tube S1And a second power switch tube S2The working process time interval when simultaneously switched off is (1-D) TsIs denoted by t1～t2。
In this embodiment, the energy storage inductor L1And follow current inductance L2The inductance values of (a) and (b) are the same.
First power switch tube S in a switching period Ts1And a second power switch tube S2Working process during simultaneous conduction and first power switch tube S1And a second power switch tube S2The working process when simultaneously turning off is separately described as follows:
first power switch tube S1Is vgs1Second power switch tube S2Is vgs2As can be taken from fig. 2, during the switching period TsT in0～t1Period of time of vgs1And vgs2All are high level, the first power switch tube S1And a second power switch tube S2Are simultaneously conducted, which is the first power switch tube S1And a second power switch tube S2The mode diagram of the circuit operation in the working process of simultaneous conduction is shown in fig. 3, see fig. 3, and the dotted frame in fig. 3 is a specifically-conducted circuit loop, in which the dc input power V isinProviding energy, generating a first current i at the positive electrodeL1Sequentially flows through the energy storage inductor L1A first power switch tube S1Back to the DC input power supply VinNegative electrode of (1), energy storage inductor L1Storing energy; a first capacitor C1Supplying energy from the first capacitor C1Of the anode ofL2Sequentially flows through the follow current inductor L2A second capacitor CoA load resistor R, a first power switch tube S1And a second power switch tube S2Flows into the first capacitor C1At this time the first capacitor C1Release energy, follow current inductance L2Energy storage, second capacitor CoEnergy is stored, and the load resistor R consumes energy.
As can be seen from FIG. 2, during the switching period TsT in1～t2Period of time of vgs1And vgs2All at low level, the first power switch tube S1And a second power switch tube S2Turn off at the same time, this is the first power switch tube S1And a second power switch tube S2The mode diagram of the circuit operation in the operation process when the circuit is turned off at the same time is shown in fig. 4, and a specifically-turned-on circuit loop is arranged in a dashed line frame in fig. 4, wherein the dc input power V isinProviding energy, generating a first current i at the positive electrodeL1Sequentially flows through the energy storage inductor L1And a first power diode D1In the first power diode D1According to kirchhoff's current law, a part of the current passes through the first capacitor C in turn1A second power diode D2Inflow DC input power supply VinAnother part of the current iL2By means of a follow current inductance L2Then respectively flows into the second capacitors CoAnd a load resistor R flowing into the DC input power supply VinThe negative electrode of (1).
Due to the energy storage inductance L1And follow current inductance L2So that the circuits in the two working processes corresponding to fig. 3 and 4 can keep the first current i in one switching periodL1(input Current), Current iL2The (output current) is low in pulsation, and input and output low ripples are realized.
In this embodiment, the first power switch S1And a second power switch tube S2MOS tube and IGBT tube may be used.
To further verify the effectiveness of the circuit provided by the present invention, in this embodiment, simulation is performed in Simplis simulation software, where various parameters of the circuit are set as follows:
DC input power supply VinVoltage of 36V, load resistance R of 100 omega, energy storage inductance L1Is set to 150uH, follow current inductance L2Is set to 150uH, the first capacitor C1Is 100uF, and a second capacitor Co220uF, switching frequency of 50kHz, and a simulation result waveform diagram shown in FIG. 5, wherein the waveform includes 5 layers from top to bottom, each layer is referred to as a switching period, and the first layer is a first power switch tube S1Drive signal vgs1And a second power switch tube S2Drive signal vgs2The low level is 0, the high level is 14.5, the second layer is a DC input power supply VinThe third layer is the first current iL1The waveform of the output voltage Vo is shown as the fourth layer, and the current i is shown as the fifth layerL2(output current) waveform, first the first power switch tube S1And a second power switch tube S2Are all turned off, the DC input power supply VinHas a voltage of 36V and a first current iL1The ripple fluctuation is low between 2A and 4A, the output voltage is 100V and is far higher than 36V, and the current iL2(output current) 1A; when the first power switch tube S1And a second power switch tube S2When the signal waveform of the first power switch tube S is at a high level1And a second power switch tube S2Are all conducted, and the direct current input power supply VinIs still 36V, the first current iL1The ripple fluctuation between 2 and 4A is still maintained, at this time, the output voltage is 100V and is far higher than 36V, and the current iL2The output current is still 1A, so it can be seen that only the first power switch tube S in the circuit needs to be controlled simultaneously1And a second power switch tube S2The on-off of the input/output voltage and the current can be simultaneously realized, an input (or output) low ripple conversion circuit is not needed to be additionally accessed, the control is easy, the volume and the cost are reduced, the output voltage is always far higher than the input voltage, and the requirement of boosting conversion during the input/output ultra-low ripple waves in various applications is met.
The invention also provides a boost converter for realizing input and output low ripples, which comprises the boost conversion circuit for realizing input and output low ripples.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A boost converter circuit for realizing low input/output ripple comprises: DC input power supply VinEnergy storage inductor L1A first power switch tube S1A second power switch tube S2A first power diode D1A second power diode D2Follow current inductor L2A first capacitor C1And an output circuit unit (1); DC input power supply VinThe anode of the capacitor is connected with an energy storage inductor L1One end of (1), energy storage inductor L1The other ends of the first and second power switch tubes are respectively connected with a first power switch tube S1Drain electrode of the first power switch tube S2And a first power diode D1The anode of (1); first power diode D1The cathodes of the two inductors are respectively connected with a follow current inductor L2And a first capacitor C1One end of (1), a follow current inductor L2The other end of the first capacitor C is connected with the input end of the output circuit unit (1)1The other ends of the first and second power switch tubes are respectively connected with a second power switch tube S2And a second power diode D2The anode of (1); the DC input power supply VinNegative pole of (1), first power switch tube S1Source electrode of, second power diode D2The cathode and the output end of the output circuit unit (1) are both grounded; first power switch tube S1And a second power switch tube S2The grid electrodes of the first power switch tube S are all connected with an external driving signal1And a second power switch tube S2In the same switching period TsAt the first power switch tube S, with simultaneous internal conduction or simultaneous turn-off1And a second power switch tube S2When simultaneously on or simultaneously off, the energy storage inductor L1The output circuit unit (1) outputs the electric energy which is higher than the DC input power supply VinThe output voltage Vo of the input voltage.
2. The boost converter circuit with low input-output ripple according to claim 1, wherein the output circuit unit (1) comprises a second capacitor CoAnd a load resistor R, the second capacitor CoIn parallel with the load resistor R.
3. The boost converter circuit with low input-output ripple according to claim 2, wherein the boost converter circuit with low input-output ripple is configured to perform a switching period TsThe method comprises two working processes: first power switch tube S1And a second power switch tube S2Working process during simultaneous conduction and first power switch tube S1And a second power switch tube S2And simultaneously, the working process when the power is turned off.
4. The boost converter circuit with low input-output ripple according to claim 3, wherein the switching period T issHas a time interval of t0～t2Wherein, t0Indicating the switching period TsStart time of (t)2Indicating the switching period TsEnd time of (1), set t1Indicating the first power switch tube S1And a second power switch tube S2Setting a first power switch tube S at the end time point of the working process when the two are simultaneously conducted1And a second power switch tube S2When the time duty ratio of the working process is D, the first power switch tube S1And a second power switch tube S2The working process time interval is DT during simultaneous conductionsIs denoted by t0～t1(ii) a Provided with a first power switch tube S1And a second power switch tube S2The time duty ratio of the working process when the power is turned off at the same time is 1-D, then the first power switch tube S1And a second power switch tube S2The working process time interval when simultaneously switched off is (1-D) TsIs denoted by t1～t2。
5. The boost converter circuit with low input-output ripple according to claim 4, wherein the energy storage inductor L1And follow current inductance L2The inductance values of (a) and (b) are the same.
6. The boost converter circuit according to claim 5, wherein the first power switch tube S is provided1Is vgs1Second power switch tube S2Is vgs2In the switching period TsT in0～t1Period of time of vgs1And vgs2All are high level, the first power switch tube S1And a second power switch tube S2Simultaneous on, DC input source VinProviding energy, generating a first current i at the positive electrodeL1Sequentially flows through the energy storage inductor L1A first power switch tube S1Back to the DC input power supply VinNegative electrode of (1), energy storage inductor L1Storing energy; a first capacitor C1Supplying energy from the first capacitor C1Of the anode ofL2Flowing-through follow current inductor L2A second capacitor CoA load resistor R, a first power switch tube S1And a second power switch tube S2Flows into the first capacitor C1At this time the first capacitor C1Release energy, follow current inductance L2Energy storage, second capacitor CoEnergy is stored, and the load resistor R consumes energy.
7. The boost converter circuit with low input-output ripple according to claim 6, wherein the switching period T is setsT in1～t2Period of time of vgs1And vgs2All at low level, the first power switch tube S1And a second power switch tube S2Simultaneous turn-off, DC input supply VinThe energy is provided for the purpose of,a first current i generated by the anodeL1Sequentially flows through the energy storage inductor L1And a first power diode D1In the first power diode D1In which a part of the current passes through the first capacitor C in turn1A second power diode D2Inflow DC input power supply VinAnother part of the current iL2By means of a follow current inductance L2Then respectively flows into the second capacitors CoAnd a load resistor R flowing into the DC input power supply VinThe negative electrode of (1).
8. The boost converter circuit with low input-output ripple according to claim 7, wherein the first power switch tube S1And a second power switch tube S2An MOS tube is adopted.
9. The boost converter circuit with low input-output ripple according to claim 7, wherein the first power switch tube S1And a second power switch tube S2An IGBT tube is adopted.
10. A boost converter for realizing low input and output ripples, which is characterized in that the converter comprises the boost converter circuit for realizing low input and output ripples according to any one of claims 1 to 9.
CN202110377737.5A 2021-04-08 2021-04-08 Boost conversion circuit and converter for realizing input and output low ripple waves Expired - Fee Related CN113098245B (en)

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