CN106712499B - A kind of low electric stress one-switch control buck-boost converter - Google Patents
A kind of low electric stress one-switch control buck-boost converter Download PDFInfo
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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
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Abstract
A kind of new low electric stress one-switch control buck-boost converter, including input power vin, switching tube S1, inductance L1, inductance L2, diode D1, diode D2, diode D3, capacitor C1, capacitor C2, output resistance load R or constant power load P；Input power vin, switching tube S1 series winding, inductance L1 is parallel to the series arm of input power vin, switching tube S1, the one end inductance L1 connects diode D1 cathode, the other end connects diode D2 cathode, the capacitor C2 other end, diode D1 anode connects the one end capacitor C1, the one end inductance L2, another terminating diode D3 cathode of capacitor C1, diode D2 anode, another terminating diode D3 anode of inductance L2, the one end C2, output resistance load R or constant power load P are parallel to the both ends capacitor C2.
Description
Technical field
The present invention relates to switching power converter field, suitable for the occasion for exporting negative voltage and buck being needed to convert,
The occasion that output lower voltage is especially needed under decompression mode is more suitable for being applicable in the lower occasion of component electric stress requirement
The occasion of constant power load including driving switch power inverter, solid-state power amplifier etc., the present invention are a kind of new
Low electric stress one-switch control buck-boost converter.
Background technique
Spaceborne put admittedly is widely used in putting down comprising the difference such as Beidou navigation satellite, point's series of satellites, remote sensing series of satellites
The satellite system of platform.Solid-state amplifier complete machine (SSPA) is by solid-state amplifier rf chain, low frequency control panel, solid discharge source (EPC)
Three parts composition, wherein the function of solid-state power amplifier rf chain is using microwave power field-effect tube to low power radio frequency
Input after the multistage amplification of signal progress as next stage；Low frequency control panel mainly examines solid-state power amplifier rf chain
Wave, partial pressure, ALC control etc.；Gu discharge source is as the main power supplying and distributing equipment being connected on star with a bus interface, function
It is to receive remote control command signal on star, realizes switching on and shutting down control, a higher busbar voltage is converted to and puts rf chain admittedly and has
Source block need secondary voltage and by secondary voltage, timing is exported as required, the distant of solid-state amplifier working condition is provided
Measured data, and guarantee that solid-state amplifier powers off in time when load and bus are abnormal situation, protect solid-state amplifier equipment
With a bus.Gu the superiority and inferiority of discharge source performance directly determines the superiority and inferiority for putting overall performance admittedly, its efficiency determines complete machine
The height of efficiency, its size determine the size and weight of complete machine.
Compared to traditional linear stabilized power supply, switching power converter namely DC-DC converter are with a kind of efficient, high
Reliable and high economic benefit mode realizes that the electric energy from power supply to load is converted, thus is widely used in spaceborne power supply.Buck
Converter, Boost, Buck-boost converter, Cuk converter, Sepic converter and Zeta converter are six classes
Basic converter topology.
For solid discharge source, topology selection is most important.Different topologys is related to different control modes, device choosing
The key contents such as type, magnetic elements design.For existing spaceborne solid discharge source, topology is used and has included buck, rises
The cascading of pressure type, semibridge system, full-bridge type, push-pull type, normal shock, flyback etc. and above-mentioned each topology.But in fact, such
There are two problems using main, and first for one-stage topology, bus ranges significantly range when, work point design is multiple
It is miscellaneous, it is not easy to realize optimal.And for two-stage topology, prime topology or be to boost or be decompression, in bus most significant end or least significant end
All suffer from duty ratio design limit and efficiency decrease problem.And when second level topology response speed quickly when, prime is non-
Isolated topology is also faced with stability problem when different topology cascade；Second, now all of switching power converter topology
It is all based on ohmic load and designs, but the loadtype that actually switching power converter is driven is not only that resistive is negative
It carries, further includes constant power load etc..Extensive use with distributed power supply system in fields such as aerospace, automotive systems,
The ratio of constant power load in systems is increasing, and scholar Louganski K P is in " the Modeling and of document 1.
analysis of a DC power distribution system in 21st century air lifters”(Black
sburg,VA:Department of Electrical and Computer Engineering,Virginia Tech,
1999.51~96.), scholar Chandrasekaran S is in document 2. " Subsystem design in aircraft power
distribution systems using optimization"(Black sburg,VA:Department of
Electrical and Computer Engineering, Virginia Tech, 2000.27~57.) show following mostly electric
In machine high voltage direct current distribution system, 75% load is constant power load.Under the application of small-power missile-borne weapon, due to
Its caliber is small, and range is nearly (about several kilometers to more than ten kilometers), and input is DC bus, and the input and output of most systems should not
Isolation is asked, equally, for moonlet, situation is similar.The power transmission of all these space flight and aviation equipment and armament equipment
In link, solid-state power amplifier or traveling wave tube power amplifier are all essential power amplification devices.With solid-state function
The continuous promotion of rate amplifier performance, the continuous quickening of response speed, the ideal model after entering saturation region are negative for invariable power
It carries, in such cases, when above topology drives solid-state power amplifier, equally has load cascade stability problem.
Ohmic load, the voltage at resistance both ends and the electric current for flowing through resistance meet Ohm's law, i.e., are one between the two
Kind linear relationship.And the power that the characteristics of constant power load is the load consumption is kept constant, i.e. constant power load both end voltage
With flow through constant power load electric current between relationship be also nonlinear.Therefore, constant power load is nonlinear load, is discontented with
Sufficient superposition theorem etc..
The design and analysis of existing switching power converter are both for ohmic load.It can be obtained by consulting literatures
It arrives, the main problem that switching power converter is faced when driving constant power load is that circuit is not inherently under shaping modes
Stable, and by voltage close loop and current closed-loop, although its unstability can be improved to a certain extent, due to its constraint
Condition is extremely harsh, therefore in system transients work, as easily entered unstable state when starting, varying load, bus voltage.Scholar
Grigore Vlad, Hatonen Jari, Kyyra Jorma, Suntio Teuvo is in " the Dynamics of a Buck of document 3.
converter with a constant power load”(29th Annual IEEE Power Electronics
Specialists Conference (PESC), 1998,1:72-78.) in by theory analysis and Experiment of Electrical Circuits research after obtain
When Buck converter drives constant power load and controls in voltage mode, system will be in unstable under continuous conduction mode
State can be stablized under discontinuous conduction mode.Even and all using discontinuous conduction mode circuit after Controlled in Current Mode and Based
It is unstable.At this point, the stress of the voltage and current of power switch tube and diode will increase in Buck converter.Scholar Li
Yushan, Vannorsdel Kevin R., Zirger Art J., Norris Mark, Maksimovic Dragan. are in document
4.“Current mode control for Boost converters with constant power loads”(IEEE
Transactions on Circuit and Systems-I:Regular Papers, 2012,59 (1): 198-206.), learn
Person Byungcho Choi, Bo H.Cho, Sung-Soo Hong. are in " the Dynamics and Control of DC- of document 5.
to-DC Converters Driving Other Converters Downstream.”(IEEE Transactions On
Circuits And Systems—I:Fundamental Theory And Applications,VOL.46,NO.10,
OCTOBER 1999, pp.1240-1248.) in show: when the load of Boost be constant power load when, what is obtained is defeated
Voltage includes that there are two right half plane poles to the transmission function of duty ratio out, this also means that the Boost under opened loop control
Converter has been in low-frequency oscillation state namely unstable state.This also means that above-mentioned switch power becomes under opened loop control
Parallel operation is when driving the nonlinear loads such as constant power load, it is impossible to operate normally.
While the output in order to realize wider range, it must just make switching power converter work in the item of limit duty ratio
Under part, efficiency is so not only reduced, system's transient response is made to be deteriorated, also improves the requirement of control circuit.Based on above-mentioned
Reason explores new topology and is of great significance.Wherein, it can realize boosting output, and the liter of reduced output voltage may be implemented
Step-down circuit is very widely used.In addition to the existing tradition bucks such as Buck-Boost step-up/step-down circuit and Cuk, Zepic
Outside circuit, scholar Patidar and Umarikar is in " the A step-up PWM DC-DC converter for of document 6.
renewable energy applications.”(International Journal of Circuit Theory and
Applications,Int.J.Circ.Theor.Appl.2016；44:817–832.Published online22June
2015in Wiley Online Library (wileyonlinelibrary.com)) in propose that a kind of new buck is opened up
It flutters, only a switching tube needs to control, and voltage transmission ratio is (1-D)/(1-2D), but since the clamper of diode is made
With duty ratio cannot be greater than 0.5, so this converter is only operable on boost mode, if a diode therein changed
For switching tube, this converter is operable with decompression mode, but the interactive controlling of two active devices becomes complicated at this time.Scholar
Hwu and YauKY is in " the Two types of KY buck-boost converters of document 7.."(IEEE TRANSACTIONS
ON INDUSTRIAL ELECTRONICS, vol.56, no.8, pp.2970-2980, Aug.2009.) propose that KY goes up and down piezoelectricity
Road has the fast-response energy similar with Buck circuit, continuous to export electric current and lower output voltage ripple, voltage
Transfer ratio is 2D, but its voltage transmission ratio is unable to satisfy requirement when needing wider output voltage.
Summary of the invention
Technical problem solved by the present invention is having overcome the deficiencies of the prior art and provide a kind of new low electric stress single tube
Buck-boost converter is controlled, the boost or depressurization of output voltage may be implemented, need buck to convert suitable for negative output voltage
Occasion, especially needed under decompression mode output lower voltage occasion or to the lower occasion of device electric stress requirement, simultaneously
It is also applied for the occasion of driving constant power load, in addition, converter of the present invention only includes that an active device needs to control, control
Simply, circuit operation logic is clear, has the advantages that overvoltage stress and overcurrent stress of all devices without transient state.
The technical solution of the invention is as follows: a kind of new low electric stress one-switch control buck-boost converter, including input
Power supply vin, switching tube S1, inductance L1, inductance L2, diode D1, diode D2, diode D3, capacitor C1, capacitor C2, output
Ohmic load R or constant power load P；
Input power vin, switching tube S1 series winding, inductance L1 are parallel to the series arm of input power vin, switching tube S1,
The one end inductance L1 connects diode D1 cathode, and the other end connects diode D2 cathode, the capacitor C2 other end, and diode D1 anode connects
The one end capacitor C1, the one end inductance L2, another terminating diode D3 cathode of capacitor C1, diode D2 anode, another termination of inductance L2
Diode D3 anode, the one end C2, output resistance load R or constant power load P are parallel to the both ends capacitor C2.
The switching tube S1 is connect with the anode of input power vin or negative terminal.
The duty ratio D of the switching tube S1 adjusts the output voltage values of converter, when in the case where driving ohmic load mode
When so that converter output voltage being lower than input voltage, duty ratio D is less thanWhen in driving ohmic load mode
When down so that converter output voltage is equal to input voltage, duty ratio D is equal toWhen in driving ohmic load mould
When converter output voltage being made to be greater than input voltage under formula, duty ratio D is greater than
The advantages of the present invention over the prior art are that:
(1) present invention is by the way that by vin and S1 series winding, S1 can be interconnected with vin anode, and S1 can also be mutual with vin negative terminal
Connection；L1 is parallel to the series arm of vin and S1, while the cathode of the one end L1 connection D1, the other end connect the cathode and C2 of D2
The other end；The anode of D1 is connected with one end of C1 and L2；The other end of C1 is connected with the anode of the cathode of D3 and D2；
The other end of L2 is connected with one end of the anode of D3 and C2；Output resistance load R or constant power load P is parallel to the two of C2
End has under decompression mode voltage gain than lower advantage；
(2) present invention by only control a switching tube S1, have driving constant power load not shaping modes namely
More stable than Cuk circuit under open loop workplace, when closed-loop control, design of Regulator is also more easier, more suitable for
Constant power load is driven, there is good use value；
(3) present invention passes through the comparison of tradition Buck-Boost circuit, Cuk circuit, circuit electric stress of the present invention, has low
The advantages of electric stress.
Detailed description of the invention
Fig. 1 is a kind of new low electric stress one-switch control buck-boost converter structure chart of the present invention；
Fig. 2 is negative output buck-boost type Cuk converter topology circuit structure diagram；
Fig. 3 be voltage gain of the present invention than, traditional Buck-Boost/Cuk circuit, KY Buck-Boost circuit voltage
The ratio of gains (referred to absolute value) comparison diagram, when duty ratio is 0.8, voltage gain curve is followed successively by traditional from top to bottom
One Buck-Boost converter body/Cuk converter, converter of the present invention, KY buck-boost converter；
Fig. 4 is the simulation waveform of present invention driving ohmic load, wherein Fig. 4 (a) drives resistance when being using the present invention
The simulation waveform of load；Fig. 4 (b) is the simulation waveform of Cuk circuit drives ohmic load, in Fig. 4 (a) waveform from upper and
Under successively are as follows: capacitor C2 voltage namely output voltage (0.02v/div), capacitor C1 voltage (0.2v/div), inductance L1 electric current
(0.5A/div), inductance L2 electric current (0.5A/div), horizontal axis time scale are 199.8ms~200ms (50us/div)；In Fig. 4
(b) waveform is from top to bottom successively are as follows: capacitor C2 voltage namely output voltage (0.1v/div), capacitor C1 voltage (0.05v/div),
Inductance L1 electric current (2A/div), inductance L2 electric current (2A/div), horizontal axis time scale are 199.8ms~200ms (50us/div)；
Fig. 5 is the simulation waveform of present invention driving constant power load；Wherein, Fig. 5 (a) is permanent using driving when the present invention
The simulation waveform of power termination, Fig. 5 (b) are the simulation waveform of Cuk circuit drives constant power load；In Fig. 5 (a) waveform from
Under above successively are as follows: capacitor C2 voltage namely output voltage (0.005v/div), capacitor C1 voltage (0.05v/div), inductance L1
Electric current (0.2A/div), inductance L2 electric current (0.2A/div), horizontal axis time scale are 199.8ms~200ms (50us/div)；?
Waveform is from top to bottom successively in Fig. 5 (b) are as follows: capacitor C2 voltage namely output voltage (1v/div)；Capacitor C1 voltage (5v/div),
Inductance L1 electric current (1A/div), inductance L2 electric current (1A/div), horizontal axis time scale are 180ms~200ms (50us/div).
Specific embodiment
In view of the deficiencies of the prior art, the present invention proposes a kind of new low electric stress one-switch control buck-boost converters, can
To realize the boost or depressurization of output voltage, suitable for the occasion that negative output voltage needs buck to convert, especially decompression mode
The lower occasion that need to export lower voltage or to the lower occasion of device electric stress requirement, while it is negative to be also applied for driving invariable power
The occasion of load, in addition, converter of the present invention only includes that an active device needs to control, control is simple, circuit operation logic is clear
It is clear, have the advantages that overvoltage stress and overcurrent stress of all devices without transient state, the present invention is carried out with reference to the accompanying drawing
It is described in detail.
A kind of new low electric stress one-switch control buck-boost converter of the invention is suitable for negative output voltage and needs buck
The occasion of transformation, especially needs the occasion of output lower voltage under decompression mode, while being also applied for the field of driving constant power load
It closes, including input power (vin), switching tube (S1), inductance (L1, L2), diode (D1, D2, D3), capacitor (C1, C2), output
Ohmic load R or constant power load P.
Vin and S1 series winding, S1 can be interconnected with vin anode, and S1 can also be interconnected with vin negative terminal；L1 is parallel to vin
With the series arm of S1, while the one end L1 connection D1 cathode, the other end connect D2 cathode and C2 the other end；The anode of D1
It is connected with one end of C1 and L2；The other end of C1 is connected with the anode of the cathode of D3 and D2；The other end of L2 and D3's
One end of anode and C2 are connected；Output resistance load R or constant power load P is parallel to the both ends of C2.
The present invention realizes different changes by the turn-on time length of regulating switch pipe (S1) namely the size of duty ratio D
Parallel operation output voltage values.In the case where driving ohmic load mode, input and output voltage gainIn order to facilitate narration
Illustrated below with absolute value, is less than in duty ratio DWhen, the voltage value that this circuit is exported is lower than input voltage,
Decompression mode is worked in, is equal in duty ratio DWhen, the voltage value that this circuit is exported is equal to input voltage,
Duty ratio D is greater thanWhen, the voltage value that this circuit is exported is higher than input voltage, works in boost mode；It is driving
Under dynamic constant power load mode, it is slightly different under input and output voltage transfer ratio and ohmic load mode, derivation process is the same.
The present invention be quadravalence circuit, be all quadravalence circuit basic switch power inverter in Cuk circuit compare,
In the case where driving ohmic load occasion, the voltage gain ratio that topological circuit of the invention has in decompression is lower, is driving permanent function
The not shaping modes of rate load namely open loop workplace, more stable than Cuk circuit, when closed-loop control, adjuster is set
Meter is also more easier, and more suitable for driving constant power load, has good use value.Specific embodiment is to the present invention below
It is described in further detail.
In specific implementation, power supply vin takes 24V, inductance L1 to take 500uH, inductance L2 that 200uH, capacitor C1 is taken to take 22uF,
Capacitor C2 takes 100uF, output connecting resistance load R to take 10 ohm, and output meets constant power load P and takes 10W.Duty ratio selection 0.5.
Referring to Fig. 2 in order to compare with the negative output buck topological circuit proposed in the present invention, attached drawing is given together
Sample is the negative output buck-boost type Cuk converter topology figure of quadravalence circuit.In order to verify the present invention, Fig. 3 give the present invention and
The voltage gain of Fig. 2 circuit is than absolute value curve.In order to verify the present invention, Fig. 3 gives the present invention and Fig. 2 circuit in driving electricity
Simulation result when resistance load compares, which shows in buck mode, circuit topology ratio Cuk tool proposed by the present invention
There is lower voltage gain.In order to verify the present invention, Fig. 4 gives the present invention and Fig. 2 circuit when driving constant power load
Simulation result compares, which shows that topological circuit proposed by the present invention has stable region when driving constant power load
Between, different from the unstable state of Cuk converter output oscillation.It can see from the simulation waveform of Fig. 5, Cuk converter connects perseverance
When power termination, oscillation should be produced for the output waveform of direct current, be at this time unstable state.It is of the invention low in order to prove
Electric stress, table 1 give traditional Buck-Boost circuit, Cuk circuit, the present invention in each main components electric stress of circuit ratio
It is right.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
The comparison of table 1 tradition Buck-Boost circuit, Cuk circuit, each main components electric stress of circuit of the present invention
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| CN107493638B (en) * | 2017-09-25 | 2019-10-01 | 江苏大学 | Based on BOOST-BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive power and switching method |
| CN108809096B (en) * | 2018-06-08 | 2019-07-12 | 西安空间无线电技术研究所 | A square high-gain boost/buck-boost converter for wide bus range |
| CN109309448B (en) * | 2018-11-21 | 2024-03-12 | 三峡大学 | Wide-input wide-output Cuk DC-DC converter |
| CN111585433B (en) * | 2020-05-07 | 2022-02-11 | 国网重庆市电力公司电力科学研究院 | A general interface, control method and energy storage system |
| CN119298663B (en) * | 2024-12-11 | 2025-03-21 | 西安航科创星电子科技有限公司 | A step-up DC-DC converter with open-loop stable operation under constant power load and its control system |
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| CN101505107A (en) * | 2009-01-20 | 2009-08-12 | 华南理工大学 | Low voltage stress single-stage AC-DC converter based on LLC series resonance |
| CN204068702U (en) * | 2014-09-26 | 2014-12-31 | 三峡大学 | A Non-isolated High Gain DC/DC Converter |
| CN105141133A (en) * | 2015-10-26 | 2015-12-09 | 南京信息工程大学 | MIT model reference adaptive control method for double-tube type booster and buck converter |
| CN106208699A (en) * | 2016-08-17 | 2016-12-07 | 西安交通大学 | A kind of mixed energy storage system DC converter based on Buck/Boost circuit and control method thereof |
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