CN112350573A - Boost-improved Boost gain Cuk converter single-switch DC-DC circuit - Google Patents

Boost-improved Boost gain Cuk converter single-switch DC-DC circuit Download PDF

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Publication number
CN112350573A
CN112350573A CN202011271236.0A CN202011271236A CN112350573A CN 112350573 A CN112350573 A CN 112350573A CN 202011271236 A CN202011271236 A CN 202011271236A CN 112350573 A CN112350573 A CN 112350573A
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China
Prior art keywords
boost
capacitor
power diode
power
improved
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CN202011271236.0A
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Chinese (zh)
Inventor
林维明
肖健
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Fuzhou University
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Fuzhou 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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • 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

Abstract

The invention relates to a Boost-improved Boost gain Cuk converter single-switch DC-DC circuit. The Boost conversion circuit comprises a Boost conversion unit and an improved Boost gain Cuk conversion unit with a switched capacitor unit; the Boost conversion unit and the improved Boost gain Cuk conversion unit with the switched capacitor unit multiplex the switching tube into a single-switch high-gain circuit; the input end of the Boost conversion unit is connected with a direct-current power supply, and the output end of the improved Boost gain Cuk conversion unit with the switched capacitor unit is connected with a load. The circuit has the characteristics of continuous input power supply current and small output current ripple; high voltage gain, high conversion efficiency and lower electromagnetic interference are realized.

Description

Boost-improved Boost gain Cuk converter single-switch DC-DC circuit
Technical Field
The invention belongs to the fields of electric energy storage, electric automobiles, UPS (uninterrupted Power supply), smart power grids and the like, and particularly relates to a single-switch high-gain DC-DC (direct current-direct current) circuit of a Boost-improved Boost gain Cuk converter.
Background
Solar energy, wind energy, hydrogen energy and the like are considered as main foundations of future world energy structures and are one of effective ways for solving energy crisis. However, the output voltage of new energy power generation monomers such as photovoltaic and fuel cell is far lower than the direct current bus voltage required by grid connection. Therefore, for such a new energy power generation system, a high-gain boost DC-DC converter is an indispensable component therein. In addition, in the application fields of UPS power supply systems, electric vehicles, aviation power supplies, lighting smart grid systems, and the like, the high-gain boost DC-DC converter also plays an important role. The quadratic Boost converter is a quadratic high-gain circuit with two Boost converters integrated into a single controllable switching device, has the characteristics of better voltage gain and no sudden change of input current, but has discontinuous diode current and larger output ripple; the traditional boost Cuk converter topology has the advantages of small continuous ripple of output current and continuous input current, but also has the defect of low voltage gain. Therefore, the research on the boost DC-DC converter with low cost, high gain, low ripple and high efficiency is one of the key technical problems to be researched in the fields of electric vehicles, new energy power generation and the like.
Disclosure of Invention
The invention aims to provide a single-switch DC-DC circuit of a Boost-improved Boost gain Cuk converter, in particular to a single-switch high-gain circuit integrated by a Boost conversion unit and an improved Boost gain Cuk conversion unit, so that the gain effect of the circuit is further improved, and the circuit has the characteristics of high voltage gain, high conversion efficiency, low ripple and low electromagnetic interference by combining the characteristics of continuous input power supply current and small output load current pulsation of the Cuk circuit.
In order to achieve the purpose, the technical scheme of the invention is as follows: a single-switch DC-DC circuit of a Boost-improved Boost gain Cuk converter comprises a Boost conversion unit and an improved Boost gain Cuk conversion unit with a switched capacitor unit; the Boost conversion unit and the improved Boost gain Cuk conversion unit with the switched capacitor unit multiplex the switching tube into a single-switch high-gain circuit; the input end of the Boost conversion unit is connected with a direct-current power supply, and the output end of the improved Boost gain Cuk conversion unit with the switched capacitor unit is connected with a load.
In an embodiment of the present invention, the Boost conversion unit includes a first inductor L1A first power diode D1A second power diode D2A first DC bus capacitor C1A power MOS switching tube Q1; the improved boost gain Cuk conversion unit with the switched capacitor unit comprises a multiplexed power MOS (metal oxide semiconductor) switching tube Q1 and a first direct current bus capacitor C1A first power diode D1A second power diode D2And a second inductor L2A third inductor L3A third power diode D3A fourth power diode D4A fifth power diode D5An intermediate capacitor C2The first capacitor C of the improved boost gain network3And a second capacitor C of the improved boost gain network4An output capacitor C5。
In an embodiment of the present invention, the first inductor L1A second inductor L2A third inductor L3Are all high frequency inductors.
In an embodiment of the present invention, the first dc bus capacitor C1An output capacitor C5Is an electrolytic capacitor; intermediate capacitor C2The first capacitor C of the improved boost gain network3And a second capacitor C of the improved boost gain network4Are all high frequency capacitors.
In an embodiment of the present invention, the first power diode D1A second power diode D2A third power diode D3A fourth power diode D4A fifth power diode D5Are all fast recovery power diodes.
In an embodiment of the present invention, the power MOS switch Q1 is a silicon-based power MOS transistor or IGBT, or a wide bandgap semiconductor power MOS transistor or IGBT, and adopts a PWM or PFM control method.
In an embodiment of the invention, the positive electrode of the dc power supply is connected to the first inductor L1End a1 of (a); the first inductor L1Is connected with a first power diode D at the end a21And a second power diode D2The anode of (1); the first power diode D1The cathode of the power MOS switch tube Q1 is connected with the drain electrode of the power MOS switch tube Q1 and the middle capacitor C2One terminal of the improved boost gain network, the second capacitor C4The other end of the first power diode D, a fourth power diode D4And the b2 terminal of the second inductor; the second power diode D2The cathode of the capacitor is connected with a first direct current bus capacitor C1Positive terminal of, the second inductance L2Terminal b1 and first capacitor C of improved boost gain network3The other end of (a); the first bus capacitor C1Is connected with the negative electrode of the direct current power supply, the source electrode of the power MOS switching tube Q1 and a fifth power diode D5A cathode of (a); the first capacitor C of the improved boost gain network3Is connected to a fourth power diode D4And a third power diode D3The anode of (1); second capacitor C of the improved boost gain network4Is connected to a third power diode D3Cathode of (2), third inductance L3End c1 of (a); the third inductor L3C2 end of the output capacitor C5And the positive terminal of the load RL; the intermediate capacitor C2Is connected with a fifth power diode D5Anode and output capacitor C5Negative terminal of the load RL.
Compared with the prior art, the invention has the following beneficial effects:
1. the multiplexing of the power switch tube is realized by improving the Boost gain Cuk conversion unit and the Boost conversion unit of the switch capacitor, so that the voltage gain and the conversion efficiency of the circuit are further improved;
2. the circuit has the characteristics of continuous input current, small input and output current ripple and low electromagnetic interference.
Drawings
Fig. 1 is a circuit schematic diagram of an embodiment of a Boost-improved Boost gain Cuk converter single-switch DC-DC circuit of the present invention.
Fig. 2 is a mode 1 schematic diagram of a circuit switching tube Q1 in a conducting stage and working states of various elements in the embodiment of the Boost-improved Boost gain Cuk converter single-switch DC-DC circuit of the invention.
Fig. 3 is a mode 2 schematic diagram of the working states of the components of the switching tube Q1 in the off stage of the circuit of the embodiment of the Boost-improved Boost gain Cuk converter single-switch DC-DC circuit of the present invention.
Fig. 4 is the operating waveform of the key device of the switching period in CCM mode.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides a single-switch DC-DC circuit of a Boost-improved Boost gain Cuk converter, wherein the design content of the circuit part is specifically as follows: DC input power supply UiA first inductor L1A first power diode D1A second power diode D2A first bus capacitor C1A second inductor L2Power MOS switch tube Q1An intermediate capacitor C2The first capacitor C of the improved boost gain network3And a second capacitor C of the improved boost gain network4A third power diode D3A fourth power diode D4A fifth power diode D5A third inductor L3An output capacitor C5And a load RL.
The positive pole of the DC power supply is connected with a first inductor L1End a1 of (a); the first inductor L1Is connected with a first power diode D at the end a21And a second power diode D2The anode of (1); the first power diode D1The cathode of the power MOS switch tube Q1 is connected with the drain electrode of the power MOS switch tube Q1 and the middle capacitor C2One terminal of the improved boost gain network, the second capacitor C4The other end of the first power diode D, a fourth power diode D4And the b2 terminal of the second inductor; the second power diode D2The cathode of the capacitor is connected with a first direct current bus capacitor C1Positive terminal of, the second inductance L2Terminal b1 and first capacitor C of improved boost gain network3The other end of (a); the first bus capacitor C1Is connected with the negative electrode of the direct current power supply, the source electrode of the power MOS switching tube Q1 and a fifth power diode D5A cathode of (a); the first capacitor C of the improved boost gain network3Is connected to a fourth power diode D4And a third power diode D3The anode of (1); second capacitor C of the improved boost gain network4Is connected to a third power diode D3Cathode of (2), third inductance L3End c1 of (a); the third inductor L3C2 end of the output capacitor C5And the positive terminal of the load RL; the intermediate capacitor C2Is connected with a fifth power diode D5Anode and output capacitor C5Negative terminal of the load RL.
The following is a specific example of the circuit scheme operation process provided by the present invention:
the following describes a specific operation mode of the single-switch DC-DC circuit of the Boost-improved Boost gain Cuk converter according to the embodiment, with reference to specific examples, as shown in fig. 2 and fig. 3; fig. 4 is an operation waveform of a key device of a switching period in a CCM mode.
Referring to fig. 2, which is a graph of the Q1 conduction period, the semiconductor power device waveform diagram corresponds to t in fig. 4onAnd (5) stage. Power supply UiFor the first inductor L1Charging; first bus capacitor C1For the second inductor L2Charging; and a first bus capacitor C1And improving the first capacitance C of the boost gain network3Second capacitor C connected in series to improved boost gain network4Charging; first bus capacitor C1And improving the first capacitance C of the boost gain network3And an intermediate capacitor C2In series to the third inductor L3Charging the output capacitor C5And a load RL supplies power.
Referring to fig. 3, which is a Q1 turn-off period, a semiconductor power device waveform diagram thereof corresponds to t in fig. 4offAnd (5) stage. Power supply UiAnd a first inductance L1Serially discharging to the first bus capacitor C1Charging; first bus capacitor C1And a second inductance L2Discharging in series to the intermediate capacitor C2Charging; second inductance L2Discharge through diode D4First capacitor C for improved boost gain network3Charging; first bus capacitor C1A second inductor L2And a second capacitor C of the improved boost gain network4And a third inductance L3A discharge circuit is formed while supplying power to the load RL.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.

Claims (7)

1. A single-switch DC-DC circuit of a Boost-improved Boost gain Cuk converter is characterized by comprising a Boost conversion unit and an improved Boost gain Cuk conversion unit with a switched capacitor unit; the Boost conversion unit and the improved Boost gain Cuk conversion unit with the switched capacitor unit multiplex the switching tube into a single-switch high-gain circuit; the input end of the Boost conversion unit is connected with a direct-current power supply, and the output end of the improved Boost gain Cuk conversion unit with the switched capacitor unit is connected with a load.
2. The Boost-modified Boost gain Cuk converter single-switch DC-DC circuit according to claim 1, wherein the Boost conversion unit comprises a first inductor L1A first power diode D1A second power diode D2A first DC bus capacitor C1A power MOS switching tube Q1; the improved boost gain Cuk conversion unit with the switched capacitor unit comprises a multiplexed power MOS (metal oxide semiconductor) switching tube Q1 and a first direct current bus capacitor C1A first power diode D1A second power diode D2And a second inductor L2A third inductor L3A third power diode D3A fourth power diode D4A fifth power diode D5An intermediate capacitor C2The first capacitor C of the improved boost gain network3And a second capacitor C of the improved boost gain network4An output capacitor C5。
3. The Boost-modified Boost gain Cuk converter single-switch DC-DC circuit of claim 2, wherein the first inductor L1A second inductor L2A third inductor L3Are all high frequency inductors.
4. The Boost-modified Boost gain Cuk converter single-switch DC-DC circuit of claim 2, wherein the first DC bus capacitor C1An output capacitor C5Is an electrolytic capacitor; intermediate capacitor C2The first capacitor C of the improved boost gain network3And a second capacitor C of the improved boost gain network4Are all high frequency capacitors.
5. The Boost-modified Boost gain Cuk converter single-switch DC-DC circuit of claim 2, wherein the first power diode D1A second power diode D2A third power diode D3A fourth power diode D4A fifth power diode D5Are all fast recovery power diodes.
6. The Boost-improved Boost gain Cuk converter single-switch DC-DC circuit according to claim 2, wherein the power MOS switch transistor Q1 is a silicon-based power MOS transistor or IGBT, or a wide bandgap semiconductor power MOS transistor or IGBT, and adopts a PWM or PFM control mode.
7. The Boost-improved Boost gain Cuk converter single-switch DC-DC circuit according to claim 2, wherein the positive electrode of the DC power supply is connected with the first inductor L1End a1 of (a); the first inductor L1Is connected with a first power diode D at the end a21And a second power diode D2The anode of (1); the first power diode D1The cathode of the power MOS switch tube Q1 is connected with the drain electrode of the power MOS switch tube Q1 and the middle capacitor C2One terminal of the improved boost gain network, the second capacitor C4The other end of the first power diode D, a fourth power diode D4And the b2 terminal of the second inductor; the second power diode D2The cathode of the capacitor is connected with a first direct current bus capacitor C1Positive terminal of, the second inductance L2Terminal b1 and first capacitor C of improved boost gain network3The other end of (a); the first bus capacitor C1Is connected with the negative electrode of the direct current power supply, the source electrode of the power MOS switching tube Q1 and a fifth power diode D5A cathode of (a); the first capacitor C of the improved boost gain network3Is connected to a fourth power diode D4And a third power diode D3The anode of (1); second capacitor C of the improved boost gain network4Is connected to a third power diode D3Cathode of (2), third inductance L3End c1 of (a); the third inductor L3C2 end of the output capacitor C5And the positive terminal of the load RL; the intermediate capacitor C2Is connected with a fifth power diode D5Anode and output capacitor C5Negative terminal of the load RL.
CN202011271236.0A 2020-11-13 2020-11-13 Boost-improved Boost gain Cuk converter single-switch DC-DC circuit Pending CN112350573A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114221545A (en) * 2021-12-14 2022-03-22 国网福建省电力有限公司宁德供电公司 High-voltage gain boosting cuk circuit, control method and control device

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