CN109149952A - A kind of current-resonance type Sofe Switch recommends DC converter - Google Patents

A kind of current-resonance type Sofe Switch recommends DC converter Download PDF

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Publication number
CN109149952A
CN109149952A CN201710483217.6A CN201710483217A CN109149952A CN 109149952 A CN109149952 A CN 109149952A CN 201710483217 A CN201710483217 A CN 201710483217A CN 109149952 A CN109149952 A CN 109149952A
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China
Prior art keywords
power tube
voltage
current
converter
inductance
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Pending
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CN201710483217.6A
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Chinese (zh)
Inventor
伍群芳
王勤
徐佳林
陆文静
肖岚
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Priority to CN201710483217.6A priority Critical patent/CN109149952A/en
Publication of CN109149952A publication Critical patent/CN109149952A/en
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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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • 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
    • 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 current-resonance type Sofe Switch to recommend DC converter.Structure is made of input voltage source 1, input inductance 2, clamp circuit 3, main power tube 4, high frequency transformer 5, multiplication of voltage resonance circuit 6 and filtering output circuit 7.The first, second power tube of transformer primary side S1、S2Achievable no-voltage is open-minded under underloading, third auxiliary power pipe S3Realize that no-voltage is open-minded in full-load range, all power tube both ends no-voltage spikes；High frequency transformer pair side rectifier diode D4With D5Nature commutation, full-load range is interior to realize zero-current switching, diode both ends no-voltage spike.

Description

A kind of current-resonance type Sofe Switch recommends DC converter
Technical field
The present invention relates to DC-DC converter technical fields, and in particular to a kind of current-resonance type Sofe Switch recommends direct current change Parallel operation is suitable for the new energies system regions such as solar energy, fuel cell.
Background technique
The world today, which is in, large-scale develops and utilizes the third time energy by traditional fossil energy steering cleaning new energy In revolution, various countries are just at Devoting Major Efforts To Developing new energy (solar energy, wind energy and fuel cell etc.).In view of photovoltaic cell, fuel cell It exports low-voltage (generally less than 100V), needs boost DC-DC converter that low output voltage is lifted to 200~400V and be incorporated to DC bus, or local load is connected to the grid or is connected to after DC-AC inverter inversion.It can thus be seen that DC-DC converter It is the key components in new energy system, performance is directly related to the overall technology of new energy system, throws Enter return rate and sustainable development；The efficiency of converter is improved, reliability, reduces volume and weight, reduce cost with very Significance.
Current mode push-pull converter due to structure is simple, have electrical isolation, transformer utilization factor it is high, from boost function and The advantages that pulsation of input current ripple is small is commonly applied in new energy system.But traditional current mode recommends class transformation Device work is big in hard switching state, switching loss, the voltage stress at power tube both ends because transformer leakage inductance, route parasitic inductance with The effect of power junction capacitance and significantly larger than twice of input voltage.With the raising of switching frequency, switching loss and voltage Stress problem will be more serious, influences the performance of whole system.For these problems, Chinese invention patent Publication No. CN104184333A discloses a kind of push-pull converter, increases between input voltage source anode and transformer primary winding midpoint The due to voltage spikes of one LC network to inhibit booting moment to generate, it is simple and effective, but its power tube still works in hard switching State, switching loss are big；Chinese invention patent Publication No. CN1913309A discloses a kind of isolated form boost push-pull soft and opens DC-DC converter is closed, a resonance clamp capacitor and two auxiliary power pipes is increased in transformer primary side, realizes primary side institute There is the no-voltage of power tube to open and turn off, the upper due to voltage spikes of power tube is inhibited, and switching loss and EMI are reduced Noise obtains higher conversion efficiency, but also increases corresponding isolation while two auxiliary switches of increase and drive Dynamic circuit, structure is relative complex, and manufacturing cost is larger.
Summary of the invention
The purpose of the present invention is intended to the deficiency for technology described in background, proposes a kind of current-resonance type Sofe Switch and recommends DC converter, be mainly characterized in that: three power tubes of high frequency transformer primary side under underloading can be achieved no-voltage it is open-minded, power The voltage stress of pipe is equal to clamp capacitor voltage, no-voltage spike；Secondary side use voltage multiplying rectifier mode, series resonance inductor with it is humorous Vibration capacitor resonance may make rectifier diode to realize zero-current switching in wide loading range, and no-voltage spike, holds on diode The maximum voltage received is output voltage.
The present invention to achieve the goals above, adopts the following technical scheme that.
A kind of current-resonance type Sofe Switch of the invention recommends DC converter, and structure includes input direct-current voltage source Vin、 Input inductance Lb, clamp circuit, the first power tube S1, the second power tube S2, high frequency transformer Tr, resonant inductance Lr, multiplication of voltage resonance Circuit, filter capacitor CoAnd load Ro.The clamp circuit includes third power tube S3With clamp capacitor Cc；The multiplication of voltage Resonance circuit includes resonant inductance Lr, diode D4、D5With resonant capacitance Cr1、Cr2；The high frequency transformer Tr includes primary side First winding NP1, the second winding of primary side NP2, vice-side winding NsAnd the equivalent magnetizing inductance L of primary sidem2、Lm1；The resonant inductance Lr Leakage inductance including transformer；First, second and third power tube includes its anti-paralleled diode D1、D2、D3With junction capacity C1、C2、 C3.Circuit connecting relation are as follows: DC voltage source VinAnode with input inductance LbLeft end be connected, input inductance LbRight end connect In the first, second power tube S1、S2Drain electrode and third power tube S3Source electrode, third power tube S3Drain electrode and clamp capacitor Cc Upper end be connected, the first power tube S1Source electrode be connected to transformer primary winding Np1Different name end, the second power tube S2Source electrode It is connected to transformer primary winding Np2Same Name of Ends, Np1Same Name of Ends and Np2Different name end jointly with clamp capacitor CcLower end and DC voltage source VinCathode be connected；Transformer secondary winding NsSame Name of Ends and resonant inductance LrLeft end be connected, resonance electricity Feel LrRight end and resonant capacitance Cr1Lower end and Cr2Upper end be connected, transformer secondary winding NsDifferent name end and rectification two poles Pipe D4Anode and D5Cathode be connected, D4Cathode and resonant capacitance Cr1Upper end be connected to filter capacitor C jointlyoAnd load Ro Upper end, D5Anode and resonant capacitance Cr2Lower end jointly with filter capacitor CoAnd load RoLower end be connected.
Current-resonance type Sofe Switch of the present invention recommends DC converter power tube S1~S3PWM drive signal are as follows: First power tube S1Driving signal be duty ratio be greater than 0.5 square-wave signal, the second power tube S2Driving signal be first Phase shift 180 degree on the basis of power tube driving signal, third power tube S3Driving signal be the first power tube S1With the second power Pipe S2Complementary signal.In addition, increasing certain dead time between each driving signal.
Of the present invention, second, third power tube S1、S2、S3For power MOSFET, the first, second power tube underloading Achievable no-voltage is open-minded down, and third power tube realizes that no-voltage is open-minded in wide loading range, and all power tube both ends are without electricity Pointing peak.
Rectifier diode D of the present invention4With D5For nature commutation, zero-current switching can be achieved in wide loading range, Diode both ends no-voltage spike, voltage stress are output voltage.
Clamp circuit of the present invention can not only be realized to power tube S1、S2、S3Both end voltage carries out clamper, while The energy of absorbable high frequency transformer and loop of power circuit leakage inductance.
The present invention main technical characterstic compared with original technology are as follows: on the basis of conventional push-pull converter, pass through tune The position of whole transformer primary side power tube, increasing third power tube and clamp capacitor can be realized and answer all power tube voltages The clamper of power, while leakage inductance energy is recycled, the voltage stress of device is reduced, power tube can realize that no-voltage is open-minded, reduces Switching loss；In addition, the rectifier diode of transformer secondary utilizes resonant inductance LrWith resonant capacitance Cr1、Cr2Resonance can realize Zero-current switching, output voltage clamper is on diode, no-voltage spike；Transformer configuration it is relatively easy, it can be achieved that high energy efficiency, The transformation of electrical energy of high reliability.
Detailed description of the invention
Attached drawing 1 is that current-resonance type Sofe Switch proposed by the present invention recommends DC converter structural schematic diagram.
Attached drawing 2 is that current-resonance type Sofe Switch of the invention recommends DC converter implementation structural schematic diagram.
Attached drawing 3 is that current-resonance type Sofe Switch of the invention recommends the main waveform diagram of DC converter implementing circuit.
4~attached drawing of attached drawing 8 is each switch that current-resonance type Sofe Switch of the invention recommends DC converter embodiment Mode schematic diagram.
Primary symbols title in the figures above: Vin: input direct-current voltage；Lb: input inductance；S1~S3: power tube (MOSFET)；C1~C3: power tube S1~S3Junction capacity；D1~D3: power tube S1~S3Inverse parallel body diode；Cc: clamper Capacitor；Tr: high frequency transformer；Lm1、Lm2: primary side winding NP1、NP2Equivalent magnetizing inductance；Lr: resonant inductance；D4~D5: rectification Diode；Cr1~Cr2: resonant capacitance；Co: filter capacitor；Ro: load resistance；iLb: flow through the electric current of input inductance；iLm1、iLm2: Flow through transformer primary winding NP1、NP2Exciting current；ILm1: the maximum value of exciting current；i1~i3: flow through power tube S1~S3 Electric current；is: flow through transformer secondary side current；icr1、icr2: flow through resonant capacitance Cr1、Cr2Electric current；iD4: flow through two poles of rectification Pipe D4Electric current；vD4: diode D4The backward voltage of receiving；Vo: output voltage；Ts: switch periods, D: duty ratio.
Specific embodiment
Technical solution of the present invention is described in detail with reference to the accompanying drawings and embodiments.
Attached drawing 1 is that current-resonance type Sofe Switch proposed by the present invention recommends DC converter structural schematic diagram.
Attached drawing 2, attached drawing 3 be respectively current-resonance type Sofe Switch of the invention recommend DC converter implement structure chart and its Main waveform diagram.As shown in Fig. 2, structure by input voltage source 1, input inductance 2, clamp circuit 3, main power tube 4, High frequency transformer 5, multiplication of voltage resonance circuit 6 and filtering output circuit 7 form.Wherein, VinFor input direct-current voltage source, LbFor input Inductance, power tube S3With clamp capacitor CcForm clamp circuit, S1With S2For the first and second main power tube, D1~D3And C1~C3Respectively For power tube S1~S3Body diode and junction capacity, Tr be high frequency transformer, resonant inductance Lr, diode D4、D5And capacitor Cr1、Cr2Form multiplication of voltage resonance circuit, CoFor filter capacitor, RoFor output loading.This inverter power pipe S1~S3The driving of use Signal are as follows: power tube S1Driving signal using duty ratio be greater than 0.5 square-wave signal, power tube S2Driving signal be the Phase shift 180 degree on the basis of one power tube driving signal, power tube S3Driving signal be then power tube S1With power tube S2It is mutual Complement signal increases certain dead time at the same time between each driving signal.
It is main circuit structure with attached drawing 2, recommends direct current in conjunction with 8 pairs of 3~attached drawing of attached drawing current-resonance type Sofe Switch of the present invention The concrete operating principle of converter carries out detailed discussion.By attached drawing 3 it is found that work of the converter in a switch periods can It is divided into 10 sub- mode, respectively [t0~t1]、[t1~t2]、[t2~t3]、[t3~t4]、[t4~t5]、[t5~t6]、[t6~ t7]、[t7~t8]、[t8~t9]、[t9~t10], wherein [t0~t5] it is that first half cycle works, [t6~t10] it is later half period work Make.Since the work of forward and backward half period is similar, the course of work of each submodule state of first half cycle is analyzed in detail below.
For the ease of analysis, following hypothesis: 1) power tube S is first done1~S3With rectifier diode D4~D5For ideal component, Conduction voltage drop is zero；2) clamp capacitor CcWith output filter capacitor CoIt is sufficiently large, clamp voltage VcWith output voltage VoTwo can be regarded as A constant pressure source；3) resonant capacitance is equal in magnitude and is Cr1=Cr2=Cr, power tube S1~S3Junction capacity it is equal in magnitude and be C1= C2=C3=C；4) pair of high frequency transformer Tr, the primary side winding turn ratio are n and size are as follows: n=Ns/NP1=Ns/NP2, primary side excitation Inductance Lm1=Lm2=Lm, transformer leakage inductance refracts to secondary side and for resonant inductance LrA part.
1 mode, 1 [t0~t1] [respective figure 4]
In t0~t1Stage, primary side power tube S2Shutdown, S1And S3Common conducting；Secondary side rectifier diode D4Conducting afterflow, D5Cut-off；Power is transmitted from primary side to secondary side.In this mode, clamp capacitor voltage VcAct on transformer winding NP1On, refraction To transformer secondary winding NsOn voltage be nVc, secondary side resonant capacitance Cr1Charging, Cr2Electric discharge and with resonant inductance LrIt is common humorous Vibration；Secondary current i can be obtained according to Kirchoff s voltage current lawsWith capacitor Cr1On voltage change are as follows:
In formula, IspeakFor secondary current isPeak value, vcr1(t0) it is t0Moment capacitor Cr1On voltage value, in addition, resonance Impedance and resonance angular frequency are respectively as follows:
Due to capacitor Cr1With Cr2Both capacitance is equal and a switch periods are interior charge and discharge symmetrically work, and therefore, flow through Cr1 With Cr2On electric current be respectively secondary current isHalf be is/2。
Under the mode, transformer magnetizing current iLmBy winding NP1It provides and in voltage VcUnder the action of linear rise；Input Inductive current iLbBecause of input voltage VinWith capacitance voltage VcVoltage difference and linear decline, equation of change can derive are as follows:
In formula, iLm1(t0) it is t0Moment exciting current iLm1Size, ILb maxFor the maximum value of input current.In addition, root According to transformer primary pair frontier juncture, system can obtain primary current i1=nis(t)+iLm1(t), i3=il(t)-iLb(t)。
t1Moment, secondary current isResonance is to zero, corresponding primary current i1Resonance to exciting current iLm1It is equal, this mould State terminates.
2 mode, 2 [t1~t2] [respective figure 5]
Work as t=t1Moment, secondary current isResonance is to zero, diode D4Zero-current switching can be achieved.Hereafter, secondary two pole of side Pipe D4、D5It is turned off, output filter capacitor CoPowering load inputs inductive current iLbContinue to decline, descending slope mode 1 one It causes.Under this mode, exciting current is from power tube S1It flows through, primary current i1With i3Variation are as follows:
t2Moment, power tube S3Shutdown inputs inductive current iLbWith exciting current iLm1Respectively reach minimum value ILbminWith most Big value ILm, this mode terminates.
3 mode, 3 [t2~t3]
t2Moment, power tube S3Shutdown, due to C3Effect, S3Zero voltage turn-off may be implemented.According to input inductive current Minimum value ILbminWith exciting current maximum value ILmSize, there are two kinds of situations for this mode.
Situation A) ILm> ILbmin[respective figure 6]: electric current i3Direction is positive (reference direction is as shown in Fig. 2), in t2When It carves, switch-off power pipe S3, current difference ILm-ILbminGive capacitor C3Charging, C2Electric discharge, power tube S2With S3Voltage vC2、vC3Change It turns to:
t3Moment, power tube S3Voltage vC3Rise to Vc, power tube S2Voltage vC2Diode D after dropping to zero2It leads It is logical, S2It is open-minded that no-voltage can be realized.
Situation B) ILm≤ILbmin[respective figure 5]: electric current i3Direction is negative (reference direction is as shown in Fig. 2), in t2When It carves, switch-off power pipe S3, i3Still from diode D3It flows through, this process and mode 2 are consistent, until next mode arrives.
By above feasible, the situation A) it is only possible in the case where appearing in light load, therefore, the main function of converter of the invention Rate pipe S1With S2It is open-minded that no-voltage may be implemented under underloading.
4 mode, 4 [t3~t4] [respective figure 7]
t3Moment opens power tube S2, situation A) under S2Open-minded, the situation B for no-voltage) under S2To be still that hard switching is open-minded. S2Open so that transformer winding voltage is reduced to zero, input inductive current iLbLinear rise and variation are as follows:
iLb(t)=ILb_min+Vin(t-t3)/Lb (6)
Under this mode, transformer winding voltage is zero, and due to magnetic flux equilibrium relation, exciting current is by two windings of primary side It is common to provide, exciting current iLm1From ILmDrop to ILm/ 2, iLm2Reversely drop to-I from 0Lm/ 2, input inductive current average mark With flowing through winding Np1With Np2, therefore, primary current i1、i2Size are as follows:
Secondary side diode D in the mode4With D5It still works in off state, bearing power is by output filter capacitor CoIt provides.
5 mode, 5 [t4~t5] [respective figure 8]
t4Moment turns off main power tube S1, due to C1Effect, S1Zero voltage turn-off can be achieved.Due to inputting inductive current It cannot be mutated, so that a upper mode flows through S1Electric current be diverted to flow through clamp circuit, i.e., from diode D3It flows through, D3Conducting make Obtain auxiliary power pipe S3It is open-minded that no-voltage may be implemented.Since input inductance energy is sufficiently large, power tube S3It can be in width Realize that no-voltage is open-minded in loading range.
Under this mode, power tube S1Both end voltage is raised to 2V from above freezingc, power tube S3Both end voltage is from VcDrop to zero.Become Depressor winding Np1On the exciting current that flows through all go to winding Np2On, secondary current isStart because of the variation of primary current anti- It ramps up.t5Moment, no-voltage open power tube S3, into next Modality work, the course of work is similar with mode 1.
t5After moment, converter enters second half of the cycle [t5~t10] work, the course of work is similar to preceding half period [t0~t1], it no longer repeats herein.
In summary it is known that current-resonance type Sofe Switch of the invention recommends DC converter with following several respects Advantage:
1) compared to having similar topology, the converter topology structure invented is simpler, reduces manufacturing cost.
2) clamp circuit can not only carry out clamper to power tube both end voltage, reduce power tube voltage stress, while can also It realizes that no-voltage is open-minded with auxiliary power pipe, reduces switching loss, improve conversion efficiency.
3) rectifier diode is nature commutation, realizes that zero-current switching, diode both ends no-voltage spike, voltage stress are Output voltage.

Claims (5)

1. a kind of current-resonance type Sofe Switch recommends DC converter, it is characterised in that: structure includes input direct-current voltage source Vin、 Input inductance Lb, clamp circuit, the first power tube S1, the second power tube S2, high frequency transformer Tr, resonant inductance Lr, multiplication of voltage resonance Circuit, filter capacitor CoAnd load Ro.The clamp circuit includes third power tube S3With clamp capacitor Cc；The multiplication of voltage Resonance circuit includes resonant inductance Lr, diode D4、D5With resonant capacitance Cr1、Cr2；The high frequency transformer Tr includes primary side First winding NP1, the second winding of primary side NP2, vice-side winding NsAnd the equivalent magnetizing inductance L of primary sidem2、Lm1；The resonant inductance Lr Leakage inductance including transformer；First, second and third power tube includes its anti-paralleled diode D1、D2、D3With junction capacity C1、C2、 C3.Circuit connecting relation are as follows: DC voltage source VinAnode with input inductance LbLeft end be connected, input inductance LbRight end connect In the first, second power tube S1、S2Drain electrode and third power tube S3Source electrode, third power tube S3Drain electrode and clamp capacitor Cc Upper end be connected, the first power tube S1Source electrode be connected to transformer primary winding Np1Different name end, the second power tube S2Source electrode It is connected to transformer primary winding Np2Same Name of Ends, Np1Same Name of Ends and Np2Different name end jointly with clamp capacitor CcLower end and DC voltage source VinCathode be connected；Transformer secondary winding NsSame Name of Ends and resonant inductance LrLeft end be connected, resonance electricity Feel LrRight end and resonant capacitance Cr1Lower end and Cr2Upper end be connected, transformer secondary winding NsDifferent name end and rectification two poles Pipe D4Anode and D5Cathode be connected, D4Cathode and resonant capacitance Cr1Upper end be connected to filter capacitor C jointlyoAnd load Ro Upper end, D5Anode and resonant capacitance Cr2Lower end jointly with filter capacitor CoAnd load RoLower end be connected.
2. a kind of current-resonance type Sofe Switch according to claim 1 recommends DC converter, it is characterised in that: power tube S1~S3PWM drive signal are as follows: the first power tube S1Driving signal be duty ratio be greater than 0.5 square-wave signal, the second power Pipe S2Driving signal be on the basis of the first power tube driving signal phase shift 180 degree, third power tube S3Driving signal be First power tube S1With the second power tube S2Complementary signal.
3. according to claim 1, a kind of current-resonance type Sofe Switch described in 2 recommends DC converter, it is characterised in that: One, second, third power tube S1、S2、S3It is for power MOSFET, achievable no-voltage is opened under the first, second power tube underloading Logical, third power tube realizes that no-voltage is open-minded in wide loading range, all power tube both ends no-voltage spikes.
4. according to claim 1, a kind of current-resonance type Sofe Switch described in 2 recommends DC converter, it is characterised in that: rectification Diode D4With D5For nature commutation, zero-current switching, diode both ends no-voltage spike, electricity can be achieved in wide loading range Compression is output voltage.
5. according to claim 1, a kind of current-resonance type Sofe Switch described in 2 recommends DC converter, it is characterised in that: clamper Circuit not only can carry out clamper to power tube both end voltage, while also can absorb the energy of high frequency transformer and circuit leakage inductance.
CN201710483217.6A 2017-06-19 2017-06-19 A kind of current-resonance type Sofe Switch recommends DC converter Pending CN109149952A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN110581649A (en) * 2019-09-20 2019-12-17 福州大学 high-gain soft-switching direct-current converter and control method thereof
CN112087143A (en) * 2020-08-21 2020-12-15 南京理工大学 Quasi-parallel resonant converter with multi-end input and single-end output
CN112821760A (en) * 2021-01-22 2021-05-18 上海空间电源研究所 Weinberg soft switching converter for spacecraft
CN113541503A (en) * 2021-02-26 2021-10-22 南京航空航天大学 Zero-current switch active clamping current type push-pull direct-current converter
RU2810649C1 (en) * 2023-04-03 2023-12-28 Акционерное Общество "Концерн "Океанприбор" Key stabilized converter
CN117937951A (en) * 2024-03-22 2024-04-26 江苏展芯半导体技术股份有限公司 DC/DC converter

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CN105048824A (en) * 2015-07-02 2015-11-11 南京航空航天大学 Voltage clamping soft switch push-pull direct current converter
CN105141138A (en) * 2015-10-21 2015-12-09 南京航空航天大学 Voltage-doubling type soft switching push-pull DC converter

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US20140169041A1 (en) * 2012-12-17 2014-06-19 Chung-Shan Institute Of Science And Technology Dc to dc converting circuit
CN103078514A (en) * 2013-01-05 2013-05-01 浙江大学 Push-pull converter with voltage multiplying resonance capability
CN105048824A (en) * 2015-07-02 2015-11-11 南京航空航天大学 Voltage clamping soft switch push-pull direct current converter
CN105141138A (en) * 2015-10-21 2015-12-09 南京航空航天大学 Voltage-doubling type soft switching push-pull DC converter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110581649A (en) * 2019-09-20 2019-12-17 福州大学 high-gain soft-switching direct-current converter and control method thereof
CN110581649B (en) * 2019-09-20 2021-03-02 福州大学 High-gain soft-switching direct-current converter and control method thereof
CN112087143A (en) * 2020-08-21 2020-12-15 南京理工大学 Quasi-parallel resonant converter with multi-end input and single-end output
CN112087143B (en) * 2020-08-21 2022-11-04 南京理工大学 Quasi-parallel resonant converter with multi-end input and single-end output
CN112821760A (en) * 2021-01-22 2021-05-18 上海空间电源研究所 Weinberg soft switching converter for spacecraft
CN113541503A (en) * 2021-02-26 2021-10-22 南京航空航天大学 Zero-current switch active clamping current type push-pull direct-current converter
RU2810649C1 (en) * 2023-04-03 2023-12-28 Акционерное Общество "Концерн "Океанприбор" Key stabilized converter
CN117937951A (en) * 2024-03-22 2024-04-26 江苏展芯半导体技术股份有限公司 DC/DC converter
CN117937951B (en) * 2024-03-22 2024-06-04 江苏展芯半导体技术股份有限公司 DC/DC converter

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Application publication date: 20190104