CN107395015A - A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance - Google Patents
A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance Download PDFInfo
- Publication number
- CN107395015A CN107395015A CN201710668727.0A CN201710668727A CN107395015A CN 107395015 A CN107395015 A CN 107395015A CN 201710668727 A CN201710668727 A CN 201710668727A CN 107395015 A CN107395015 A CN 107395015A
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- Prior art keywords
- inductance
- coupling inductance
- converter
- electric capacity
- circuit
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Classifications
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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
- H02M3/1588—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 comprising at least one synchronous rectifier element
-
- 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
- H02M1/0048—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
-
- 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 kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance, including first, second MOSFET, coupling inductance, the 3rd inductance, first, second electric capacity, resistance.In circuit proposed by the present invention, it is not necessary to increase additional device or circuit for two switching tubes, you can realize that Sofe Switch works, while significantly decrease output current ripple, reduce requirement of the converter to filter circuit.Although the converter of invention adds a coupling inductance and an electric capacity, but in actual design, inductance value and capacitance can be reduced substantially, generally speaking reduce the volume and weight of converter, on the premise of circuit cost is not increased, the improved efficiency of converter is realized.
Description
Technical field
Patent of the present invention discloses a kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance, is related to
Electric and electronic technical field.
Background technology
Decompression transducer circuit (Buck circuits) is a kind of simplest buck dc-dc converter circuit, quilt
It is widely used in various power electronic equipments.But switching loss and high-frequency noise caused by its hard switching process, give
This quasi-converter realizes high frequency, limitation and challenge is brought in high power density.In order to reduce loss, raising efficiency is synchronous
Rectification Buck converters arise at the historic moment, and one additional power switch pipe of this kind of converter applications instead of in traditional circuit
Commutation diode, using the control mode of synchronous rectification.
Traditional synchronous rectification Buck converters when not increasing the auxiliary circuit of extra active or passive device composition,
The Sofe Switch of master power switch pipe can not be realized, so in order to further reduce switching loss, it is necessary to allow all switching tubes all works
Make in sofe switch pattern.Pass through the design to filter inductance electric current in converter, it is possible to achieve inductance electricity in each switch periods
That flows is reverse in short-term, you can all to realize to carry out discharge and recharge by junction capacity of the reverse inductive current to main switch
The ZVT of switching tube, the efficiency of converter is set to get a promotion.But because the presence of two-way inductive current, it result in new
The problem of produce, outputting inductance current ripples are very big, and then have very high requirement to output filter capacitor, generally require compared with
Big electrochemical capacitor ensures the precision of output voltage, the problem of not only bringing the increase of converter volume, cost increase, electric capacity
The ESR of itself also results in the consumption of energy.
The content of the invention
Patent technical problem to be solved of the present invention is：To overcome the deficiencies in the prior art, there is provided Yi Zhongji
In the low ripple Sofe Switch synchronous rectification Buck converters of coupling inductance, it is not necessary to for the device outside two switching tube plus or
Circuit, it can be achieved with the ZVT of all switching tubes.Meanwhile special filter network is employed, significantly decrease defeated
Go out inductive current ripple, reduce the requirement to output filter part, realize the low ripple and improved efficiency of converter.
Patent of the present invention uses following technical scheme to solve above-mentioned technical problem：
A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance, it is characterised in that：Including first,
2nd MOSFET, coupling inductance, the 3rd inductance, first, second electric capacity, resistance, wherein,
The drain electrode of first MOSFET is connected with input anode, the first MOSFET source electrode and the 2nd MOSFET
Drain electrode, the Same Name of Ends of the first inductance of coupling inductance be connected, the different name end of the first inductance of coupling inductance and coupling inductance
The second inductance Same Name of Ends, one end of the 3rd inductance be connected, the second inductance different name end of coupling inductance and the one of the second electric capacity
End, one end of resistance be connected, the other end of the 3rd inductance is connected with one end of the first electric capacity, the 2nd MOSFET source electrode and
Input cathode, the other end of the first electric capacity, the other end of the second electric capacity, the other end of resistance are connected.
Present invention technical characteristics compared with prior art are：
Circuit structure is simple, it is not necessary to which complicated control, two switching tubes can be achieved with ZVT, transducer effciency
Get a promotion.
Outputting inductance current ripples are significantly decreased, the requirement to output filter circuit are reduced, compared to traditional
Synchronous buck converter, reduce the winding of inductance and the value of electric capacity, circuit cost does not increase, and the output of converter is smart
Degree and efficiency are improved.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of patent of the present invention, wherein：Q1、Q2Respectively first, second MOSFET, L2、L1
It is the first inductance and the second inductance in coupling inductance respectively, Same Name of Ends is as illustrated, its mutual inductance is
L3It is the 3rd inductance, C3, C0It is the first electric capacity and the second electric capacity respectively, R is resistance.
Fig. 2 is the groundwork ripple of the low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance of the present invention
Shape schematic diagram.
Fig. 3~8 are the equivalent electrics of the low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance of the present invention
Line structure schematic diagram.
Fig. 9 is the equivalent circuit structure schematic diagram of the filter network of the present invention.
Figure 10 is the artificial circuit figure of a design example of converter circuit of the present invention.
Figure 11 is the simulation waveform of output voltage in Figure 10.
Figure 12 is the simulation waveform of inductive current in Figure 10.
Figure 13 is Figure 12 blown-up partial detail.
Embodiment
The embodiment of patent of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein
Same or similar label represents same or similar element or the element with same or like function from beginning to end.Lead to below
It is exemplary to cross the embodiment being described with reference to the drawings, and is only used for explaining patent of the present invention, and can not be construed to the present invention
The limitation of patent.The modification that all Spirit Essences according to main technical schemes of the present invention are done, it should all cover the guarantor in the present invention
Within the scope of shield.
The technical scheme of patent of the present invention is described in further detail below in conjunction with the accompanying drawings：
A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance, including first, second MOSFET,
Coupling inductance, the 3rd inductance, first, second electric capacity, resistance.
The drain electrode of first MOSFET is connected with input anode, the first MOSFET source electrode and the 2nd MOSFET
Drain electrode, the Same Name of Ends of the first inductance of coupling inductance be connected, the different name end of the first inductance of coupling inductance and coupling inductance
The second inductance Same Name of Ends, one end of the 3rd inductance be connected, the second inductance different name end of coupling inductance and the one of the second electric capacity
End, one end of resistance be connected, the other end of the 3rd inductance is connected with one end of the first electric capacity, the 2nd MOSFET source electrode and
Input cathode, the other end of the first electric capacity, the other end of the second electric capacity, the other end of resistance are connected.
It is below main circuit structure with accompanying drawing 1, with reference to the concrete operating principle of the narration present invention of accompanying drawing 2~8.By accompanying drawing 2
Understand that whole converter there are 6 kinds of switch mode in a switch periods, be [t respectively0~t1]、[t1~t2]、[t2~t3]、[t3
~t4]、[t4~t5]、[t5~t6] (see accompanying drawing 2).Due to electric current iL1And iL3The Sofe Switch process of switching device is not participated in directly
The working condition of i.e. each switch mode, herein below are divided into switch mode concrete analysis ripple and eliminate two portions of network concrete analysis
Point.
The working condition of each switch mode is made a concrete analysis of below, before analysis, it is assumed that all devices are reason
Think device.
Switch [the t of mode 10~t1]
Q1Conducting, inductance L2,L1Bear the difference of input voltage and output voltage, therefore electric current iL2Linear rise, from reverse electricity
Flow valuve is until positive maximum+Im。
Switch [the t of mode 21~t2]
In t1Moment, Q1Shut-off.The time of mode 2 is very short, can be by iL2Regard a constant-current source as, to Q1Junction capacity charging,
To Q2Junction capacity electric discharge, Q2Drain-source voltage begin to decline, when dropping to zero, mode 2 terminates.
Switch [the t of mode 32~t3]
Q2Drain-source voltage when dropping to zero, Q2Parasitic diode conducting, then Q2Drain-source voltage remain zero.
Switch [the t of mode 43~t4]
In t3Moment, Q2Grid be changed into high level, Q2No-voltage is open-minded.iL2Flow through Q2。L2On bear output voltage, electric current is opened
Initial line reduces, until being changed into reverse.In t4Moment, Q2Zero voltage turn-off.
Switch [the t of mode 54~t5]
In t4Moment, iL2Reversely, can be to Q1Junction capacity electric discharge, while to Q2Junction capacity charging.Q1Drain-source voltage can be near
Linear decline is seemingly thought, until Q1Drain-source voltage drop to zero, mode 5 terminates.
Switch [the t of mode 65~t6]
Q1Drain-source voltage when dropping to zero, Q1Parasitic diode conducting, then Q1Drain-source voltage remain zero.In t6Moment,
Q1No-voltage turns on.
Network is eliminated to ripple below and carries out labor.
For a coupling inductance, the AC compounent in two winding current should meet condition：nL2ΔiL2=
nL1ΔiL1.In fig.9, coupling inductance is equivalent to magnetizing inductance L by usmWith ideal transformer n2、n1Combination, pass through branch road
L3、C3To control magnetizing inductance LmOn voltage, allow iL2In all AC compounents flow through magnetizing inductance L entirelym, then L2In line
Ripple electric current can not just be delivered to the primary side of coupling inductance, also be achieved that to electric current iL1Ripple eliminate.Pass through row write circuit
Equation, electric current i can be obtainedL1In the expression formula of ripple be
Figure 10 is the artificial circuit figure of a design example of converter circuit of the present invention.Performance indications are input voltage
40V, output voltage 24V, rated power 48W, switching frequency 200kHz.Structure proposed by the present invention is applied in this design,
Wherein three inductance values are only 4uH, and two capacitor's capacities are only 10uF, the voltage waveform such as Figure 11 at obtained load both ends.Disappear
Except the simulation waveform of ripple process is as shown in figure 12, Figure 13 be Figure 12 blown-up partial detail, wherein electric current iL2It is two-way
, provide Sofe Switch condition to two switching tubes when reverse；Electric current iL1For final output electric current, low ripple significantly reduces pair
The requirement of output filter capacitor.
As seen from the above description, the low ripple Sofe Switch synchronous rectification Buck conversion proposed by the present invention based on coupling inductance
Utensil has the following advantages：
Without designing extra additional device or circuit for switching tube, and complicated control mode is not needed, you can realize
The ZVT of two switching tubes, the efficiency of converter is set to get a promotion.
Ripple eliminates network and significantly reduces the current ripples of outputting inductance, realizes low ripple output, reduces pair
The requirement of output filter capacitor, output voltage precision are high.
In circuit proposed by the present invention, although adds additional a coupling inductance, the reduction of three inductance values,
The total quantity of coiling needed for reducing, while transducer performance is improved, efficiently reduce the volume and again of magnetic device
Amount, reduce the cost of converter.
Claims (1)
- A kind of 1. low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance, it is characterised in that：Including first, Two MOSFET, coupling inductance, the 3rd inductance, first, second electric capacity, resistance, wherein, the drain electrode and input of the first MOSFET Proper pole is connected, the drain electrode of the first MOSFET source electrode and the 2nd MOSFET, the Same Name of Ends of the first inductance of coupling inductance It is connected, the different name end of the first inductance of coupling inductance and one end phase of the second inductance Same Name of Ends of coupling inductance, the 3rd inductance Connection, the second inductance different name end of coupling inductance is connected with one end of the second electric capacity, one end of resistance, the 3rd inductance it is another End is connected with one end of the first electric capacity, the 2nd MOSFET source electrode and input cathode, the other end of the first electric capacity, the second electricity The other end of appearance, the other end of resistance are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668727.0A CN107395015A (en) | 2017-08-08 | 2017-08-08 | A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668727.0A CN107395015A (en) | 2017-08-08 | 2017-08-08 | A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance |
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| CN107395015A true CN107395015A (en) | 2017-11-24 |
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| CN201710668727.0A Pending CN107395015A (en) | 2017-08-08 | 2017-08-08 | A kind of low ripple Sofe Switch synchronous rectification Buck converters based on coupling inductance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541373A (en) * | 2020-05-18 | 2020-08-14 | 哈尔滨工业大学 | Control method of two-phase parallel synchronous rectification Boost converter based on forward coupling inductor |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Direct-current voltage reduction circuit applied to energy supply of relay protection device of transformer substation |
| CN112953240A (en) * | 2021-03-08 | 2021-06-11 | 浙江工业大学 | High-gain energy storage buck converter based on coupling inductor |
| CN113285598A (en) * | 2021-05-19 | 2021-08-20 | 哈尔滨工业大学 | Hybrid control structure of interleaved parallel Boost converters, hybrid control method of hybrid control structure, and coupling inductance optimization design method |
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| CN202616991U (en) * | 2012-05-15 | 2012-12-19 | 江苏固德威电源科技有限公司 | Soft switching synchronous rectification BUCK converter for small power |
| CN103856176A (en) * | 2014-03-12 | 2014-06-11 | 南京航空航天大学 | LCL filter with coupled inductors |
| CN106374747A (en) * | 2016-10-09 | 2017-02-01 | 中国矿业大学 | Pulse sequence control-based coupling inductor Buck converter |
| CN205992858U (en) * | 2016-09-12 | 2017-03-01 | 京东方科技集团股份有限公司 | Decompression DC translation circuit and step down DC converter |
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2017
- 2017-08-08 CN CN201710668727.0A patent/CN107395015A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202616991U (en) * | 2012-05-15 | 2012-12-19 | 江苏固德威电源科技有限公司 | Soft switching synchronous rectification BUCK converter for small power |
| CN103856176A (en) * | 2014-03-12 | 2014-06-11 | 南京航空航天大学 | LCL filter with coupled inductors |
| CN205992858U (en) * | 2016-09-12 | 2017-03-01 | 京东方科技集团股份有限公司 | Decompression DC translation circuit and step down DC converter |
| CN106374747A (en) * | 2016-10-09 | 2017-02-01 | 中国矿业大学 | Pulse sequence control-based coupling inductor Buck converter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541373A (en) * | 2020-05-18 | 2020-08-14 | 哈尔滨工业大学 | Control method of two-phase parallel synchronous rectification Boost converter based on forward coupling inductor |
| CN111865076A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Direct-current voltage reduction circuit applied to energy supply of relay protection device of transformer substation |
| CN112953240A (en) * | 2021-03-08 | 2021-06-11 | 浙江工业大学 | High-gain energy storage buck converter based on coupling inductor |
| CN112953240B (en) * | 2021-03-08 | 2023-10-20 | 浙江工业大学 | High-gain energy storage buck converter based on coupling inductance |
| CN113285598A (en) * | 2021-05-19 | 2021-08-20 | 哈尔滨工业大学 | Hybrid control structure of interleaved parallel Boost converters, hybrid control method of hybrid control structure, and coupling inductance optimization design method |
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Application publication date: 20171124 |