CN105896977A - Soft switch of interlaced parallel DC-DC converter - Google Patents

Soft switch of interlaced parallel DC-DC converter Download PDF

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Publication number
CN105896977A
CN105896977A CN201610213077.6A CN201610213077A CN105896977A CN 105896977 A CN105896977 A CN 105896977A CN 201610213077 A CN201610213077 A CN 201610213077A CN 105896977 A CN105896977 A CN 105896977A
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side winding
coupling inductance
resonant
inductance
capacitance
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CN201610213077.6A
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CN105896977B (en
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何良宗
廖育贤
程琛
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Xiamen University
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Xiamen 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
    • 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
    • H02M3/1584—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 with a plurality of power processing stages connected in parallel
    • 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
    • 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
    • H02M3/1584—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 with a plurality of power processing stages connected in parallel
    • H02M3/1586—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 with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
    • 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)
  • Inverter Devices (AREA)

Abstract

A soft switch of an interlaced parallel DC-DC converter relates to a DC-DC converter, and is equipped with a power supply, an output capacitor, a power switching tube, a freewheel diode, an absorbing capacitor, a clamping capacitor, an auxiliary switch, a resonant inductor, a resonant capacitor, switched capacitors, an output diode, a first coupling inductor and a second coupling inductor. The first and second coupling inductors are three-winding coupling inductors, and each three-winding coupling inductor comprises a primary winding, a first secondary winding and a second secondary winding. The soft switch realizes the no-voltage conduction and the no-voltage turn-off of the power switching tube, possesses an automatic current sharing capability, and solves the reverse recovery problem of the diode at turn-off by utilizing the leakage inductance of the two three-winding coupling inductors to control the current falling rate in the diode. The second and third windings of the three-winding coupling inductors are utilized to realize the high-gain output of the converter, and the two switched capacitors are utilized to expand the voltage output of the converter and reduce the voltage stress of a power device, so that the power loss is small, and the structure is concise.

Description

A kind of Sofe Switch of crisscross parallel type DC-DC converter
Technical field
The present invention relates to DC-DC converter, especially relate to the Sofe Switch of a kind of crisscross parallel type DC-DC converter.
Background technology
Along with increasingly sharpening of the energy and environmental issue, the new energy grid-connected power technology such as photovoltaic cell, fuel cell obtains extensively Pay close attention to.And the output voltage grade of photovoltaic cell, fuel cell is relatively low, it is impossible to meet the power reguirements of existing electrical equipment, also Cannot be carried out grid-connected transmission, so it is low to need to insert a high gain and high efficiency between these electricity generation module and common DC bus The high-performance DC-DC converter of input current ripple.In order to be effectively improved the voltage gain of DC converter, many scholars propose The multiple converter topology structure with high boost function.Anti exciting converter circuit is simple, by adjusting the circle of flyback transformer Than realizing high voltage gain, but inputting High voltage output application scenario in low pressure, the transformer primary side number of turn is little, causes transformator The ratio of magnetizing inductance shared by leakage inductance significantly increases, and leakage inductance does not only result in conversion efficiency and reduces, and switching tube can be caused to close power-off simultaneously Pointing peak is too high.In recent years, crisscross parallel Boost and obtained many in fuel cell and photovoltaic generating system The extensive concern of scholar, uses crisscross parallel mode can reduce input, output current ripple, improves the dynamic response of changer. But, the voltage stress of switching tube is still equal to output voltage, and the voltage gain of changer is not the most improved.
Summary of the invention
It is an object of the invention to provide power switch pipe no-voltage open, the output of the high-gain of zero voltage turn-off and low voltage stress The Sofe Switch of a kind of crisscross parallel type DC-DC converter.
The present invention be provided with power supply, output capacitance, two power switch pipes, two fly-wheel diodes, two Absorption Capacitances, two Clamping capacitance, two auxiliary switches, two resonant inductances, two resonant capacitances, two switching capacities, two output diodes, First coupling inductance and the second coupling inductance；Described first coupling inductance and the second coupling inductance are three winding coupling inductance, described Three winding coupling inductance comprises a primary side winding and the first vice-side winding and the second vice-side winding；
One end of one end of the primary side winding of described first coupling inductance and described second coupling inductance primary side winding and described power supply Positive pole is connected, the other end of the primary side winding of described first coupling inductance and the drain electrode and described first of described first power switch pipe One end of Absorption Capacitance, the drain electrode of described first auxiliary switch, one end of described first switching capacity, described first clamp two poles The anode of pipe is connected；The source electrode of described first auxiliary switch is connected with one end of described first resonant inductance；Described first resonance electricity The other end of sense is connected with one end of described first resonant capacitance；The other end of described first switching capacity couples electricity with described first One end of first vice-side winding of sense is connected；The other end of the first vice-side winding of described first coupling inductance couples with described second One end of second vice-side winding of inductance is connected；The other end of the second vice-side winding of described second coupling inductance continues with described first The negative electrode of stream diode and the anode of described first output diode are connected；
The other end of the primary side winding of described second coupling inductance and the drain electrode of described second power switch pipe, described second absorption electricity One end of appearance, the drain electrode of described second auxiliary switch, one end of described second switch electric capacity, the sun of described second clamp diode The most connected；The source electrode of described second auxiliary switch is connected with one end of described second resonant inductance；Described second resonant inductance another One end is connected with one end of described second resonant capacitance；The of the other end of described second switch electric capacity and described second coupling inductance One end of one vice-side winding is connected；The other end of the first vice-side winding of described second coupling inductance and described first coupling inductance One end of second vice-side winding is connected；The other end of the second vice-side winding of described first coupling inductance and described second afterflow two pole The negative electrode of pipe and the anode of described second output diode are connected；
The negative electrode of described first output diode is connected with the negative electrode of described second output diode and one end of described output capacitance, The other end of described output capacitance and the negative pole of described power supply, the drain electrode of described first power switch pipe, described second power switch The drain electrode of pipe, one end of described first Absorption Capacitance, one end of described second Absorption Capacitance, one end of described first resonant capacitance, One end of described second resonant capacitance is commonly connected together.
As preferably, also include the first resonance circuit and the second resonance circuit.
As preferably, one end of described first passive-clamp resonance circuit and the drain electrode and described first of described first power switch pipe One end of switching capacity connects, the other end ground of described first passive-clamp resonance circuit and the anode of described second fly-wheel diode It is connected；One end of described second passive-clamp resonance circuit and the drain electrode of described second power switch pipe and described second switch electric capacity One end connect, be connected with the anode of described first fly-wheel diode the other end of described second passive clamp circuit.Described One resonance circuit includes the first Absorption Capacitance, the first auxiliary switch, the first resonant inductance, the first resonant capacitance；Described second humorous The circuit that shakes includes the second Absorption Capacitance, the second auxiliary switch, the second resonant inductance, the second resonant capacitance.
During work, before main switch turns on, auxiliary switch first turns on.After auxiliary switch conducting, master switch electric current declines, finally Backward diode turns on, and realizes no-voltage conducting for master switch and prepares.When switching tube turns off under the effect of Absorption Capacitance, main Switch achieves zero voltage turn-off.The electric current opening front resonant inductance is zero, and auxiliary switch achieves zero current passing.Before shutoff The anti-parallel diodes conducting of auxiliary switch, auxiliary switch achieves zero voltage turn-off.
The present invention proposes a kind of band coupling inductance and the high-gain DC-DC converter of switching capacity.This converter voltage gain height, Power grade is high, input current ripple voltage stress little, main switch is little.Under the effect of auxiliary circuit, master switch realizes No-voltage is opened and zero voltage turn-off, and auxiliary switch achieves zero current passing and zero voltage turn-off.Friendship due to coupling inductance Fork coupling, changer has automatic current equalizing ability.
Accompanying drawing explanation
Fig. 1 is the circuit theory of constitution figure of the embodiment of the present invention.
Fig. 2 is the equivalent circuit of the embodiment of the present invention.
Fig. 3 is the switch mode 1 [t of the embodiment of the present invention0t1] equivalent circuit diagram.
Fig. 4 is the switch mode 2 [t of the embodiment of the present invention1t2] equivalent circuit diagram.
Fig. 5 is the switch mode 3 [t of the embodiment of the present invention2t3] equivalent circuit diagram.
Fig. 6 is the switch mode 4 [t of the embodiment of the present invention3t4] equivalent circuit diagram.
Fig. 7 is the switch mode 5 [t of the embodiment of the present invention4t5] equivalent circuit diagram.
Fig. 8 is the switch mode 6 [t of the embodiment of the present invention5t6] equivalent circuit diagram.
Fig. 9 is the switch mode 7 [t of the embodiment of the present invention6t7] equivalent circuit diagram.
Figure 10 is the switch mode 8 [t of the embodiment of the present invention7t8] equivalent circuit diagram.
Figure 11 is the switch mode 9 [t of the embodiment of the present invention8t9] equivalent circuit diagram.
Figure 12 is the switch mode 10 [t of the embodiment of the present invention9t10] equivalent circuit diagram.
Figure 13 is the switch mode 11 [t of the embodiment of the present invention10t11] equivalent circuit diagram.
Figure 14 is the key waveforms figure of the embodiment of the present invention.
Detailed description of the invention
Below by the present invention will be further described in conjunction with the accompanying drawings and embodiments.
See Fig. 1, a kind of soft-switching and high-gain DC-DC converter that the present invention provides, comprise two power tube (S1、S2), Two Absorption Capacitance (CS1、CS2), two auxiliary switch (Sr1、Sr2), two resonant inductance (Lr1、Lr2), two resonance electricity Hold (Cr1、Cr2), two clamp diode (DC1、DC2), two clamping capacitance (CC1、CC2), two fly-wheel diode (Df1、 Df2), two switching capacity (Cf1、Cf2), two output diode (Do1、Do2), an output capacitance (Co) and two three around Group coupling inductance, is characterized in that the primary side winding (L of the first coupling inductance1p) the primary side winding (L of one end and the second coupling inductance2p) One end and power supply (Vin) anode be connected, the other end then with the first power tube (S1) drain electrode, the first clamp diode (DC1) Anode and the first switching capacity (Cf1) one end and the first Absorption Capacitance (CS1) one end and the first auxiliary switch (Sr1) Drain electrode is connected；First clamp diode (Dc1) negative electrode and the first clamping capacitance (CC1) one end and second fly-wheel diode (Df2) anode be connected, the first switching capacity (Cf1) the other end and the first vice-side winding (L of the first three winding coupling inductance1s1) One end be connected, the first vice-side winding (L of the first three winding coupling inductance1s1) the other end and the second coupling inductance second secondary Limit winding (L2s2) one end be connected, the second vice-side winding (L of the second three winding coupling inductance2s2) the other end and the first afterflow Diode (Df1) negative electrode and the first output diode (Do1) anode be connected；Second three winding coupling inductance primary side winding (L2p) The other end and the second power switch pipe (S2) drain electrode and the second clamp diode (DC2) anode and second switch electric capacity (Cf2) one end and the second Absorption Capacitance (CS2) one end and the second auxiliary switch (Sr2) drain electrode be connected, second clamp Diode (Dc2) negative electrode and the second clamping capacitance (CC2) one end and the first fly-wheel diode (Df1) anode be connected, the Two switching capacity (Cf2) the other end and the first vice-side winding (L of the second three winding coupling inductance2s1) one end be connected, second First vice-side winding (L of three winding coupling inductance2s1) the other end and the second vice-side winding (L of the first three winding coupling inductance1s2) One end be connected, first three winding coupling inductance the second vice-side winding (L1s2) the other end and the second fly-wheel diode (Df2) Negative electrode and the second output diode (Do2) anode be connected, the second output diode (Do2) negative electrode and the first output diode (Do1) negative electrode and output capacitance (Co) one end be connected, output capacitance (Co) the other end and power supply (Vin) negative terminal, First power switch pipe (S1) source electrode, the second power switch pipe (S2) source electrode, the first Absorption Capacitance (CS1) one end, Second Absorption Capacitance (CS2) one end, the first resonant capacitance (Cr1) one end, the second resonant capacitance (Cr2) one end, One clamping capacitance (CC1) one end and the second clamping capacitance (CC2) one end be commonly connected together.
Former limit (the L of the first above-mentioned coupling inductance1p) and power supply (Vin) the connection end of anode and the first coupling inductance secondary second Winding (L1s1) and the first switching capacity (Cf1) connection end and first coupling inductance the second vice-side winding (L1s2) continue with second Stream diode (Df2) end that connects of negative electrode is the Same Name of Ends of the first coupling inductance；Primary side winding (the L of the second coupling inductance2p) with Power supply (Vin) anode connect end and the first vice-side winding (L of the second coupling inductance2s1) and second switch electric capacity (Cf2) company Meet end and the second vice-side winding (L of the second coupling inductance2s2) and the first fly-wheel diode (Df1) the connection end of negative electrode is second The Same Name of Ends of coupling inductance.
Described a kind of boost converter equivalent circuit as in figure 2 it is shown, the leakage inductance reduction of first and second coupling inductance secondary is to former limit, Use L respectivelyka、LkaRepresenting, changer has 22 operation modes, as shown in Fig. 3～13.Due to the symmetry of circuit, only 11 mode therein are analyzed:
Mode 1 [t0t1]: power switch pipe (S1)、(S2) it is in opening state, output diode (Do1)、(Do2) it is all reverse Biasing, clamp diode (Dc1)、(Dc2) and fly-wheel diode (Df1)、(Df2) it being off state, input voltage is to encouraging Magnetoelectricity sense (L1p), (L2p) and respective leakage inductance (Lka), (Lka) linear-charging.
Mode 2 [t1t2]: at t1Moment, (S1) turn off, the magnetizing inductance of the first coupling inductance and leakage inductance are to the first Absorption Capacitance (CS1) Linear-charging.t1In the moment, the voltage of Absorption Capacitance is zero, and main switch achieves zero voltage turn-off.
Mode 3 [t2t3]: at t2Moment, the first clamper tube (DC1) reversely pressure drop be down to zero and begin to turn on, the first coupling inductance Primary current to the first clamping capacitance (CC1) charging, the first power tube S1Still turn off, and its drain-source voltage is by the first clamp Electric capacity (CC1) pincers puts, the first three winding coupling inductance leakage inductance (LkaEnergy in) transfers to the first clamping capacitance (CC1In).
Mode 4 [t3t4]: at t3Moment, the first output diode (Do1) begin to turn on, the first switching capacity (Cf1Energy in) Amount starts to load transfer.Second fly-wheel diode (D simultaneouslyf2) conducting, the first clamping capacitance (CC1Energy in) is transferred to Second switch electric capacity (Cf2In).
Mode 5 [t4t5]: at t4Moment, the first clamp diode (DC1) turn off.
Mode 6 [t5t6]: at t5Moment, the first auxiliary switch (Sr1) conducting.Master switch (S1) drain-source voltage starts resonance Decline, the first auxiliary switch (Sr1) current resonance rise, at the first resonant inductance (Lr1) effect under, first auxiliary open Close pipe (Sr1) achieve zero current passing.First output diode (Do1), the second fly-wheel diode (Df2) electric current start under Fall.
Harmonic period is:
T = 2 π L r 1 · C - - - ( 1 )
Wherein
Mode 7 [t6t7]: at t6Moment, the first output diode (Do1) and the second fly-wheel diode (Df2) turn off.Now, One Absorption Capacitance (CS1) and the first resonant capacitance (Cr1) be together in series and the first resonant inductance (Lr1) resonance.Harmonic period is:
T = 2 π L r 1 · C s 1 · C r 1 C s 1 + C r 1 - - - ( 3 )
Mode 8 [t7t8]: at t7Moment, the first Absorption Capacitance (Cs1) voltage resonance to zero, the first power switch pipe (S1) Anti-parallel diodes turns on.First resonant inductance (Lr1) and the first resonant capacitance (Cr1) resonance.
Harmonic period is:
T = 2 π L r 1 · C r 1 - - - ( 4 )
Mode 9 [t8t9]: at t8Moment, the first power switch pipe (S1) conducting, owing to backward diode turns on, the first merit Rate pipe (S1) achieve no-voltage conducting.
Mode 10 [t9t10]: at t9Moment, the first resonant inductance (Lr1) current resonance to zero and inversely increase, first auxiliary Switching tube (Sr1) anti-parallel diodes conducting.
Mode 11 [t10t11]: at t10Moment, the first auxiliary switch pipe (Sr1) conducting, owing to its anti-parallel diodes has been turned on, Therefore, the first auxiliary switch (Sr1) achieve zero voltage turn-off.
The voltage gain of described changer is:
M = 2 · ( 1 + N ) 1 - D - - - ( 5 )
WhereinT is the cycle of master switch, T1The time of auxiliary switch conducting it is conducted to for master switch.
Seeing Fig. 3～13, the process that realizes of current-sharing is: set first and second power switch tube S1、S2Conducting duty ratio respectively is for D1、 D2, two vice-side winding of two coupling inductances are all N to the turn ratio of respective primary side winding, then the voltage gain of the first branch road 1 For:
V o 1 = V i n + V L 1 p + V C f 1 + V L 1 s 1 + V L 2 s 2 = ( ( ND 2 1 - D 2 + 1 1 - D 2 + N ) + ( 1 + N ) + ( 1 + N ) D 1 1 - D 1 ) V i n = ( 1 + N ) ( 1 1 - D 1 + 1 1 - D 2 ) - - - ( 6 )
It is also possible to the voltage gain obtaining the second branch road 2 is:
V o 2 = V i n + V L 2 p + V C f 2 + V L 2 s 1 + V L 1 s 2 = ( ( ND 1 1 - D 1 + 1 1 - D 1 + N ) + ( 1 + N ) + ( 1 + N ) D 2 1 - D 2 ) V i n = ( 1 + N ) ( 1 1 - D 2 + 1 1 - D 1 ) - - - ( 7 )
Visible Vo1=Vo2, so two branch roads still can realize from current-sharing in the case of respective dutycycle does not waits.
Figure 14 is the key waveforms figure during work of this changer.
The present invention utilizes the leakage inductance of two three winding coupling inductances to control current fall rate in diode, thus solves diode Reverse-recovery problems when off.Second and third winding utilizing two three winding coupling inductances achieves the high-gain of changer Output, utilizes two switching capacities the most further to expand the voltage output of changer, and the voltage also reducing power device should Power, the loss of whole inverter power is little, and structure is the most succinct.

Claims (3)

1. the Sofe Switch of a crisscross parallel type DC-DC converter, it is characterised in that be provided with power supply, output capacitance, two power Switching tube, two fly-wheel diodes, two Absorption Capacitances, two clamping capacitances, two auxiliary switches, two resonant inductances, Two resonant capacitances, two switching capacities, two output diodes, the first coupling inductance and the second coupling inductance；Described first Coupling inductance and the second coupling inductance are three winding coupling inductance, and described three winding coupling inductance comprises a primary side winding and first Vice-side winding and the second vice-side winding；
One end of one end of the primary side winding of described first coupling inductance and described second coupling inductance primary side winding and described power supply Positive pole is connected, the other end of the primary side winding of described first coupling inductance and the drain electrode and described first of described first power switch pipe One end of Absorption Capacitance, the drain electrode of described first auxiliary switch, one end of described first switching capacity, described first clamp two poles The anode of pipe is connected；The source electrode of described first auxiliary switch is connected with one end of described first resonant inductance；Described first resonance electricity The other end of sense is connected with one end of described first resonant capacitance；The other end of described first switching capacity couples electricity with described first One end of first vice-side winding of sense is connected；The other end of the first vice-side winding of described first coupling inductance couples with described second One end of second vice-side winding of inductance is connected；The other end of the second vice-side winding of described second coupling inductance continues with described first The negative electrode of stream diode and the anode of described first output diode are connected；
The other end of the primary side winding of described second coupling inductance and the drain electrode of described second power switch pipe, described second absorption electricity One end of appearance, the drain electrode of described second auxiliary switch, one end of described second switch electric capacity, the sun of described second clamp diode The most connected；The source electrode of described second auxiliary switch is connected with one end of described second resonant inductance；Described second resonant inductance another One end is connected with one end of described second resonant capacitance；The of the other end of described second switch electric capacity and described second coupling inductance One end of one vice-side winding is connected；The other end of the first vice-side winding of described second coupling inductance and described first coupling inductance One end of second vice-side winding is connected；The other end of the second vice-side winding of described first coupling inductance and described second afterflow two pole The negative electrode of pipe and the anode of described second output diode are connected；
The negative electrode of described first output diode is connected with the negative electrode of described second output diode and one end of described output capacitance, The other end of described output capacitance and the negative pole of described power supply, the drain electrode of described first power switch pipe, described second power switch The drain electrode of pipe, one end of described first Absorption Capacitance, one end of described second Absorption Capacitance, one end of described first resonant capacitance, One end of described second resonant capacitance is commonly connected together.
The Sofe Switch of a kind of crisscross parallel type DC-DC converter the most as claimed in claim 1, it is characterised in that also include that first is humorous Shake circuit and the second resonance circuit.
The Sofe Switch of a kind of crisscross parallel type DC-DC converter the most as claimed in claim 1, it is characterised in that described first passive One end of clamp resonance circuit is connected with one end of the drain electrode of described first power switch pipe and described first switching capacity, and described the The other end ground of one passive-clamp resonance circuit is connected with the anode of described second fly-wheel diode；Described second passive-clamp resonance One end of circuit is connected with one end of the drain electrode of described second power switch pipe and described second switch electric capacity, described second passive pincers The other end ground of position circuit is connected with the anode of described first fly-wheel diode；Described first resonance circuit include the first Absorption Capacitance, First auxiliary switch, the first resonant inductance, the first resonant capacitance；Described second resonance circuit include the second Absorption Capacitance, second Auxiliary switch, the second resonant inductance, the second resonant capacitance.
CN201610213077.6A 2016-04-07 2016-04-07 A kind of Sofe Switch of crisscross parallel type DC-DC converter Active CN105896977B (en)

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CN112821760A (en) * 2021-01-22 2021-05-18 上海空间电源研究所 Weinberg soft switching converter for spacecraft
CN116073653A (en) * 2023-02-20 2023-05-05 国网湖南省电力有限公司 Non-isolated direct current converter suitable for low-voltage photovoltaic

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CN103457460A (en) * 2013-08-26 2013-12-18 华南理工大学 High-gain boost converter based on coupling inductance and voltage transfer technology
CN103618446A (en) * 2013-12-16 2014-03-05 厦门大学 Passive clamping parallel type boost converter with coupling inductors and switch capacitors
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CN201383753Y (en) * 2009-03-23 2010-01-13 浙江大学 Pressure raising type staggered parallel connection convertor realizing inactive clamping through coupling inductance added with switching capacity
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CN103618446A (en) * 2013-12-16 2014-03-05 厦门大学 Passive clamping parallel type boost converter with coupling inductors and switch capacitors
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CN112821760A (en) * 2021-01-22 2021-05-18 上海空间电源研究所 Weinberg soft switching converter for spacecraft
CN116073653A (en) * 2023-02-20 2023-05-05 国网湖南省电力有限公司 Non-isolated direct current converter suitable for low-voltage photovoltaic
CN116073653B (en) * 2023-02-20 2024-06-18 国网湖南省电力有限公司 Non-isolated direct current converter suitable for low-voltage photovoltaic

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