CN109194140A - Low switch tube voltage stress voltage type export resonance converter - Google Patents

Low switch tube voltage stress voltage type export resonance converter Download PDF

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Publication number
CN109194140A
CN109194140A CN201811136390.XA CN201811136390A CN109194140A CN 109194140 A CN109194140 A CN 109194140A CN 201811136390 A CN201811136390 A CN 201811136390A CN 109194140 A CN109194140 A CN 109194140A
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resonant
resonant capacitance
inductance
switching tube
capacitance
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CN109194140B (en
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顾玲
向园祉
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • 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 present invention provides a kind of low switch tube voltage stress voltage type export resonance converters, including isolating transformer, primary circuit, secondary circuit；One end of first resonant inductance of primary circuit is connect with DC power supply anode, the other end and one end of magnetizing inductance, transformer primary side Same Name of Ends of first resonant inductance connect, the other end of magnetizing inductance is connect with one end of transformer primary side different name end, switching tube drain electrode, one end of the first resonant capacitance, the second resonant inductance, the other end of second resonant inductance is connect with one end of the second resonant capacitance, switching tube source electrode, the other end of the first resonant capacitance, the second resonant capacitance the other end connect with DC power supply negative terminal；The transformer secondary Same Name of Ends of secondary circuit is connect with the anode of one end of third resonant capacitance, diode, the anode of the other end of third resonant capacitance, the cathode of diode and output capacitance connects, and the negative terminal of transformer secondary different name end and output filter capacitor connects.

Description

Low switch tube voltage stress voltage type export resonance converter
Technical field
The present invention relates to a kind of controlled resonant converter technology, especially a kind of low switch tube voltage stress voltage type export resonance Converter.
Background technique
As power inverter becomes to be increasingly stringenter in terms of weight and volume design, soft switch technique becomes change Switching frequency is improved in exchanger design and increases the ideal chose of power density.It is humorous in all zero voltage switch converters Vibration converter due to have soft switch technique not only may be implemented, can with absorbing circuit parasitic parameter (leakage inductance of such as transformer, Switching tube and the junction capacity of diode etc.) reduce the advantages that parasitic parameter influences circuit under high-frequency work and is concerned.
Zero voltage switch controlled resonant converter is had conducted extensive research in modern power electronics technology development process.Its In, quasi resonant convertor only can just realize zero voltage switch by the resonant capacitance with paralleled power switches.In order to realize two poles The soft switch technique of pipe, the multi-resonance converter based on multi-resonant switch are suggested in turn.However, traditional multi-resonance converter Still problem high with switch tube voltage stress.
Summary of the invention
The purpose of the present invention is to provide a kind of low switch tube voltage stress voltage type export resonance converters, including isolation Type and non-isolation type.
Realize a kind of technical solution of the object of the invention are as follows: a kind of low switch tube voltage stress isolation type voltage-type output is humorous Shake converter, including isolating transformer, primary circuit, secondary circuit, and the primary circuit includes DC power supply, the first resonance electricity Sense, magnetizing inductance, switching tube, the first resonant capacitance, the second resonant inductance, the second resonant capacitance, the secondary circuit include two Pole pipe, third resonant capacitance, output filter capacitor；One end of first resonant inductance is connected with DC power supply anode, and first is humorous The other end of vibration inductance is connected with the Same Name of Ends of one end of magnetizing inductance, transformer primary side, the other end of magnetizing inductance and change The different name end of depressor primary side, switching tube drain electrode, one end of the first resonant capacitance, the second resonant inductance one end be connected, second The other end of resonant inductance is connect with one end of the second resonant capacitance, switching tube source electrode, the other end of the first resonant capacitance, second The other end of resonant capacitance is connected with the negative terminal of DC power supply；The Same Name of Ends of transformer secondary and the one of third resonant capacitance End, diode anode be connected, the other end, the cathode of diode of third resonant capacitance are connected with the anode of output capacitance It connects, transformer secondary different name end is connected with the negative terminal of output filter capacitor.
Using above-mentioned controlled resonant converter, one parasitic body diode of paralleled power switches, parasitic body diode anode with open It closes pipe source electrode to be connected, parasitic body diode cathode is connected with switching tube drain electrode.
Using above-mentioned controlled resonant converter, the first resonant capacitance capacity is equivalent to switch junction capacitance capacity and is connected in parallel on The sum of the capacity of resonant capacitance between switching tube source electrode, drain electrode；The third resonant capacitance capacity is equivalent to diode junction electricity Hold capacity and the sum of the capacity of resonant capacitance for being connected in parallel on two interpolar of diode；The first resonant inductance inductance value is equivalent to and becomes The sum of the concatenated resonant inductance inductance value of depressor and transformer leakage inductance.
Realize second of technical solution of the object of the invention are as follows: a kind of low switch tube voltage stress non-isolation type voltage-type is defeated Controlled resonant converter out, including DC power supply, the first resonant inductance, energy storage inductor, the first resonant capacitance, the second resonant inductance, Two resonant capacitances, diode, third resonant capacitance, output filter capacitor；One end of first resonant inductance and DC power supply anode It is connected, the first resonant inductance other end is connected with one end of one end of energy storage inductor, the anode of diode, third resonant capacitance Connect, the other end, the cathode of diode of third resonant capacitance are connected with the anode of output filter capacitor, energy storage inductor it is another End, the drain electrode of switching tube, one end of the first resonant capacitance, one end of the second resonant inductance are connected with the negative terminal of output filter capacitor It connects, the other end of the second resonant inductance is connected with one end of the second resonant capacitance, the other end of the second resonant capacitance, first humorous The other end, the source electrode of switching tube of vibration capacitor are connected with the negative terminal of DC power supply.
Using above-mentioned controlled resonant converter, one parasitic body diode of paralleled power switches, parasitic body diode anode with open It closes pipe source electrode to be connected, parasitic body diode cathode is connected with switching tube drain electrode.
Using above-mentioned controlled resonant converter, the first resonant capacitance capacity is equivalent to switch junction capacitance capacity and is connected in parallel on The sum of the capacity of resonant capacitance between switching tube source electrode, drain electrode；The third resonant capacitance capacity is equivalent to diode junction electricity Hold capacity and the sum of the capacity of resonant capacitance for being connected in parallel on two interpolar of diode.
Compared with prior art, the present invention having the advantage that
(1) low switch tube voltage stress voltage type export resonance converter can be realized simultaneously switching tube no-voltage it is open-minded It can reduce switch tube voltage stress and compared with existing multi-resonance converter with the zero-current switching of diode, and Conduction loss is smaller, more efficient；(2) low switch tube voltage stress voltage type export resonance converter of the present invention includes Low switch tube voltage stress non-isolation type voltage-type export resonance converter and low switch tube voltage stress isolation type voltage-type are defeated Controlled resonant converter out can select low switch tube voltage stress isolation type voltage-type to export in the application for needing electrical isolation Controlled resonant converter can select low switch tube voltage stress non-isolation type voltage-type defeated in the application for not needing electrical isolation Controlled resonant converter out；(3) resonance circuit that the connection type of transformer and resonant inductance, resonant capacitance form reduces switching tube Voltage stress；(4) low switch tube voltage stress voltage type export resonance converter absorbs junction capacity and two poles of switching tube The a part of the junction capacity of pipe as resonant capacitance had not only solved the problems, such as that parasitic parameter was influenced obvious but also improved under high-frequency work Transducer effciency；(5) output rectification circuit of low switch tube voltage stress voltage type export resonance converter only includes two poles Pipe, third resonant capacitance and output filter capacitor, have the advantages that structure is simple.
The invention will be further described with reference to the accompanying drawings of the specification.
Detailed description of the invention
Fig. 1 is low switch tube voltage stress isolation type voltage-type export resonance converter circuit structural schematic diagram.
Fig. 2 is low switch tube voltage stress non-isolation type voltage-type export resonance converter circuit structural schematic diagram.
Fig. 3 is equivalent circuit structure schematic diagram of the present invention.
Fig. 4 is primary waves under the first operating mode of low switch tube voltage stress isolation type voltage-type export resonance converter Shape schematic diagram.
Fig. 5 is the equivalent circuit knot for switching mode 1 in operating mode one of the present invention, switching mode 1 and 3 in operating mode two Structure schematic diagram.
Fig. 6 is the equivalent circuit structure for switching mode 2 in operating mode one of the present invention, switching mode 2 in operating mode two Schematic diagram.
Fig. 7 is the equivalent circuit structure schematic diagram that mode 3 is switched in operating mode one of the present invention.
Fig. 8 is the equivalent circuit structure for switching mode 4 in operating mode one of the present invention, switching mode 4 in operating mode two Schematic diagram.
Fig. 9 is primary waves under low switch tube voltage stress isolation type voltage-type export resonance second of operating mode of converter Shape schematic diagram.
Description of symbols in figure: input voltage Vin, the first resonant inductance Ls, magnetizing inductance Lm(Fig. 2 energy storage inductor) is opened Close pipe S, switching tube parasitic body diode Ds, the first resonant capacitance Cs, the second resonant capacitance Cr, the second resonant inductance Lr, isolation change Depressor Tr, diode D, third resonant capacitance Cd, output filter capacitor Co, export electric current Io, output voltage Vo, switching tube grid source electrode Driving voltage vgs, switching tube drain-source voltage vs, diode both end voltage vd, the first resonant inductance electric current iL, the second resonant inductance Electric current ir, the second resonant capacitance both end voltage vr。
Specific embodiment
In conjunction with Fig. 1, a kind of low switch tube voltage stress isolation type voltage-type export resonance converter, DC power supply Vin, One resonant inductance Ls, magnetizing inductance Lm, switching tube S, the first resonant capacitance Cs, the second resonant capacitance Cr, the second resonant inductance Lr, every From transformer Tr, diode D, third resonant capacitance Cd, output filter capacitor Co。
First resonant inductance LsOne end and DC power supply VinAnode is connected, the first resonant inductance LsThe other end with encourage Magnetoelectricity sense LmOne end, transformer TrThe Same Name of Ends of primary side is connected, magnetizing inductance LmThe other end and transformer TrPrimary side different name End, switching tube S drain electrode, the first resonant capacitance CsOne end, the second resonant inductance LrOne end be connected, the second resonant inductance Lr The other end and the second resonant capacitance CrOne end be connected, the source electrode of switching tube S, the first resonant capacitance CsThe other end, second Resonant capacitance CrThe other end and DC power supply VinNegative terminal be connected, transformer TrThe Same Name of Ends and third resonant capacitance on secondary side CdOne end, diode D anode be connected, third resonant capacitance CdThe other end, diode D cathode and output capacitance Co Anode be connected, transformer TrSecondary side different name end and output filter capacitor CoNegative terminal be connected.Wherein, switching tube S includes simultaneously The switching tube parasitic body diode D being associated between its drain electrode, source electrodes, the first resonant capacitance CsKnot electricity including switching tube S itself Appearance and the additional capacitor for being connected in parallel on the both ends switching tube S, third resonant capacitance CdJunction capacity including diode D itself and outer Adduction is associated in the capacitor at the both ends diode D.
In conjunction with Fig. 2, low switch tube voltage stress non-isolation type voltage-type export resonance converter, DC power supply Vin, first Resonant inductance Ls, energy storage inductor Lm, switching tube S, the first resonant capacitance Cs, the second resonant capacitance Cr, the second resonant inductance Lr, two poles Pipe D, third resonant capacitance Cd, output filter capacitor Co。
First resonant inductance LsOne end and DC power supply VinAnode be connected, the first resonant inductance LsThe other end and storage It can inductance LmOne end, diode D anode, third resonant capacitance CdOne end be connected, third resonant capacitance CdIt is another It holds, the C of the cathode of diode D and output filter capacitoroAnode be connected, energy storage inductor LmThe other end, switching tube S leakage Pole, the first resonant capacitance CsOne end, the second resonant inductance LrOne end and output filter capacitor CoNegative terminal be connected, second Resonant inductance LrThe other end and the second resonant capacitance CrOne end be connected, the second resonant capacitance CrThe other end, the first resonance Capacitor CsThe other end, switching tube S source electrode and DC power supply VinNegative terminal be connected.
Low switch tube voltage stress non-isolation type voltage-type export resonance converter and Fig. 1 low switch tube voltage in Fig. 2 Stress isolation type voltage-type export resonance converter working principle is similar, and difference is low switch tube voltage stress isolation type voltage The a part of leakage inductance as resonant inductance of isolating transformer can be absorbed in type export resonance converter；Both it can be absorbed out The a part of the junction capacity of the junction capacity and diode of closing pipe as resonant capacitance, can solve parasitic parameter shadow under high-frequency work Ring obvious problem；Low switch tube voltage stress isolation type voltage-type can be selected to export in the application for needing electrical isolation Controlled resonant converter can select low switch tube voltage stress non-isolation type voltage-type defeated in the application for not needing electrical isolation Controlled resonant converter out；In addition compared with traditional multi-resonance converter, the transformation of low switch tube voltage stress voltage type export resonance Resonant network can be obviously improved the high problem of switch tube voltage stress in device primary circuit.
The concrete operating principle of low switch tube voltage stress voltage type export resonance converter is described in conjunction with Fig. 4 to Fig. 9, Middle isolated form is identical with the working principle of non-isolation type.There are two types of operating mode, corresponding key operation waveforms for such converter Respectively as shown in fig. 4, fig. 9.
Before being analyzed, make the following assumptions: (1) all inductance, capacitor and transformer are ideal element；(2) it encourages Magnetoelectricity sense is sufficiently large, and can be approximately considered is a current source Io-Iin, IoTo export electric current, IinFor input current；(3) output filter Wave capacitor is sufficiently large, and can be approximately considered is a voltage source Vo, VoFor output voltage；(4) assume that transformer turns ratio is 1:1.
Embodiment one
Converter has 4 kinds of switch mode in each switch periods of operating mode 1 as shown in Figure 3, is [t respectively0, t1]、[t1, t2]、[t2, t3]、[t3, t4], corresponding switch mode is Fig. 5~Fig. 8.The working condition of each switch mode is carried out below specific Analysis.
1,1 [t of mode is switched0, t1]
The switch mode equivalent circuit is as shown in figure 5, switching tube S is in an off state, t0Moment, the first resonant inductance electricity Flow iLReach Iin-Io, third resonant capacitance C at this timedBegin to flow through electric current, diode D zero-current switching, third resonant capacitance Cd Participate in resonance, third resonant capacitance CdBoth end voltage (as diode both end voltage vd) resonance rising.First under this switch mode Resonant inductance Ls, the first resonant capacitance Cs, the second resonant inductance Lr, the second resonant capacitance Cr, third resonant capacitance CdParticipate in resonance.
2,2 [t of mode is switched1, t2]
The equivalent circuit of the switch mode is as shown in fig. 6, diode D is in an off state, t1Moment, the first resonant capacitance CsBoth end voltage (as switching tube drain-source voltage vs) for resonance to 0, switching tube S no-voltage is open-minded, the first resonant capacitance C at this times Exit resonance, the first resonant inductance Ls, the second resonant inductance Lr, the second resonant capacitance Cr, third resonant capacitance CdResonance is participated in, Wherein the second resonant inductance Lr, the second resonant capacitance CrSeries resonance occurs for inside, is zero to external voltage.
3,3 [t of mode is switched2, t3]
The equivalent circuit of the switch mode is as shown in fig. 7, switching tube S is in opening state, t3Moment, resonant capacitance CdTwo The voltage v at enddTo 0, diode D is connected resonance.This stage inductive current linear change, change rate areThis is opened Close the second resonant inductance L under moder, the second resonant capacitance CrSeries resonance occurs for inside, is zero to external voltage.
4,4 [t of mode is switched3, t4]
The equivalent circuit of the switch mode is as shown in figure 8, diode D is in the conductive state, t3Moment, switching tube S shutdown, Resonant capacitance CsThe voltage v at both endssResonance rises, the first resonant inductance L under the modes, the first resonant capacitance Cs, the second resonance Inductance Lr, the second resonant capacitance CrParticipate in resonance.t4Moment, diode D shutdown return to switch mode 1.
Embodiment two
The operating mode 2 unlike operating mode 1 will appear the second diode D and not turn on what switching tube S was just turned off also State, main waveform diagram are as shown in Figure 9.Converter has 4 kinds to open in each switch periods of operating mode 2 as shown in Figure 8 Mode is closed, is [t respectively0, t1]、[t1, t2]、[t2, t3]、[t3, t4].The working condition of each switch mode is carried out below specific Analysis.
1,1 [t of mode is switched0, t1]
The switch mode equivalent circuit is as shown in figure 5, switching tube S is in an off state, t0Moment, inductive current iLReach Iin-Io, third resonant capacitance CdBegin to flow through electric current, diode D zero-current switching, third resonant capacitance CdBoth end voltage vdIt is humorous Vibration rises, the first resonant inductance Ls, the second resonant inductance Lr, the first resonant capacitance Cs, the second resonant capacitance CrWith third resonance electricity Hold CdParticipate in resonance.
2,2 [t of mode is switched1, t2]
The equivalent circuit of the switch mode is as shown in fig. 6, diode D is in an off state, t1Moment, the first resonant capacitance CsBoth end voltage (i.e. switching tube S hourglass source electrode both end voltage vs) for resonance to 0, switching tube S no-voltage is open-minded, the second resonance is electric at this time Hold CsExit resonance, the first resonant inductance Ls, the second resonant inductance Lr, the second resonant capacitance Cr, third resonant capacitance CdIt participates in humorous Vibration, the second resonant inductance Lr, the second resonant capacitance CrSeries resonance occurs for inside, and externally showing voltage is zero.
3,3 [t of mode is switched2, t3]
The equivalent circuit of the switch mode is as shown in figure 5, diode D is in an off state, t2Moment, switching tube S shutdown, First resonant capacitance CsBoth end voltage vsResonance rises, at this time the first resonant capacitance Cs, the first resonant inductance Ls, the second resonance electricity Feel Lr, the second resonant capacitance Cr, third resonant capacitance CdParticipate in resonance, third resonant capacitance CdVoltage (the as diode at both ends The voltage v at the both ends Dd) continue to decline.
4,4 [t of mode is switched3, t4]
The equivalent circuit of the switch mode is as shown in figure 8, switching tube S is in an off state, t3Moment, CdThe voltage at both ends vdResonance is to 0, and diode D is connected, the first resonant inductance Ls, the second resonant inductance Lr, the second resonant capacitance CrParticipate in resonance；t4When It carves, diode D shutdown returns to switch mode 1.

Claims (6)

1. a kind of low switch tube voltage stress isolation type voltage-type export resonance converter, which is characterized in that including transformation is isolated Device, primary circuit, secondary circuit,
The primary circuit includes DC power supply (Vin), the first resonant inductance (Ls), magnetizing inductance (Lm), switching tube (S), first Resonant capacitance (Cs), the second resonant inductance (Lr), the second resonant capacitance (Cr),
The secondary circuit includes diode (D), third resonant capacitance (Cd), output filter capacitor (Co)；
First resonant inductance (Ls) one end and DC power supply (Vin) anode is connected,
First resonant inductance (Ls) other end and magnetizing inductance (Lm) one end, transformer (Tr) Same Name of Ends of primary side is connected,
Magnetizing inductance (Lm) the other end and transformer (Tr) primary side different name end, switching tube (S) drain electrode, the first resonant capacitance (Cs) one end, the second resonant inductance (Lr) one end be connected,
Second resonant inductance (Lr) the other end and the second resonant capacitance (Cr) one end connection,
Switching tube (S) source electrode, the first resonant capacitance (Cs) the other end, the second resonant capacitance (Cr) the other end and DC power supply (Vin) negative terminal be connected；
Transformer (Tr) secondary side Same Name of Ends and third resonant capacitance (Cd) one end, diode (D) anode be connected,
Third resonant capacitance (Cd) the other end, diode (D) cathode and output capacitance (Co) anode be connected,
Transformer (Tr) secondary side different name end and output filter capacitor (Co) negative terminal be connected.
2. controlled resonant converter according to claim 1, which is characterized in that two pole of the switching tube (S) parasitic body in parallel Manage (Ds), parasitic body diode (Ds) anode is connected with switching tube (S) source electrode, parasitic body diode (Ds) cathode and switching tube (S) drain electrode is connected.
3. controlled resonant converter according to claim 2, which is characterized in that
First resonant capacitance (the Cs) capacity is equivalent to switching tube (S) junction capacity capacity and be connected in parallel on switching tube (S) source electrode, leakage The sum of capacity of resonant capacitance between pole；
Third resonant capacitance (the Cd) capacity is equivalent to diode (D) junction capacity capacity and be connected in parallel on two interpolar of diode (D) The sum of capacity of resonant capacitance；
First resonant inductance (the Ls) inductance value is equivalent to and transformer (Tr) concatenated resonant inductance inductance value and transformer leakage inductance it With.
4. a kind of low switch tube voltage stress non-isolation type voltage-type export resonance converter, which is characterized in that including direct current Source (Vin), the first resonant inductance (Ls), energy storage inductor (Lm), switching tube (S), the first resonant capacitance (Cs), the second resonant inductance (Lr), the second resonant capacitance (Cr), diode (D), third resonant capacitance (Cd), output filter capacitor (Co), wherein
First resonant inductance (Ls) one end and DC power supply (Vin) anode be connected,
First resonant inductance (Ls) the other end and energy storage inductor (Lm) one end, third resonant capacitance (Cd) one end, diode (D) anode is connected,
Third resonant capacitance (Cd) the other end and diode (D) cathode, output filter capacitor (Co) anode be connected,
Energy storage inductor (Lm) the other end, switching tube (S) drain electrode, the first resonant capacitance (Cs) one end, the second resonant inductance (Lr) One end and output filter capacitor (Co) negative terminal be connected,
Second resonant inductance (Lr) the other end and the second resonant capacitance (Cr) one end be connected,
Switching tube (S) source electrode, the first resonant capacitance (Cs) the other end, the second resonant capacitance (Cr) the other end and DC power supply (Vin) negative terminal be connected.
5. controlled resonant converter according to claim 4, which is characterized in that two pole of the switching tube (S) parasitic body in parallel Manage (Ds), parasitic body diode (Ds) anode is connected with switching tube (S) source electrode, parasitic body diode (Ds) cathode and switching tube (S) drain electrode is connected.
6. controlled resonant converter according to claim 5, which is characterized in that
First resonant capacitance (the Cs) capacity is equivalent to switching tube (S) junction capacity capacity and be connected in parallel on switching tube (S) source electrode, leakage The sum of capacity of resonant capacitance between pole；
Third resonant capacitance (the Cd) capacity is equivalent to diode (D) junction capacity capacity and be connected in parallel on two interpolar of diode (D) The sum of capacity of resonant capacitance.
CN201811136390.XA 2018-09-28 2018-09-28 Low switch tube voltage stress voltage type output resonant converter Active CN109194140B (en)

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