CN107733236A - A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method - Google Patents

A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method Download PDF

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Publication number
CN107733236A
CN107733236A CN201711025676.6A CN201711025676A CN107733236A CN 107733236 A CN107733236 A CN 107733236A CN 201711025676 A CN201711025676 A CN 201711025676A CN 107733236 A CN107733236 A CN 107733236A
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CN
China
Prior art keywords
circuit
bridge arm
switch pipe
sub
resonant
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Granted
Application number
CN201711025676.6A
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Chinese (zh)
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CN107733236B (en
Inventor
李伦全
谢立海
郑车晓
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SHENZHEN BOYN ELECTRIC Co Ltd
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SHENZHEN BOYN ELECTRIC Co Ltd
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Priority to CN201711025676.6A priority Critical patent/CN107733236B/en
Priority to PCT/CN2017/113027 priority patent/WO2019080245A1/en
Publication of CN107733236A publication Critical patent/CN107733236A/en
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Classifications

    • 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
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal 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
    • H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal 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
    • 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
    • H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal 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
    • H02M7/81—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal 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 arranged for operation in parallel
    • 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)
  • Inverter Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The present invention provides a kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method.The circuit includes at least one first sub- translation circuit, at least one second sub- translation circuit and at least one controller；The first sub- translation circuit includes the first series-resonant inverting circuit, the first high-frequency isolation transformer, shares bridge arm and the first bridge arm；The second sub- translation circuit includes the second series-resonant inverting circuit, the second high-frequency isolation transformer and the second bridge arm.Methods described needs the voltage that exports according to translation circuit and needs positive or reverse operation, control forward or backwards open sequential and the control shared bridge arm break-make make the described first sub- translation circuit, the second sub- translation circuit forward or backwards alone or in combination output voltage to realize wide scope two-way changing.The circuit structure of the present invention is succinct, control is simple, has high performance-price ratio, can meet the work of wide scope.

Description

A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method
Technical field
The present invention relates to DC-DC converter, the two-way Sofe Switch DC transfer circuit of more particularly to a kind of wide scope and Its control method.
Background technology
With the fast development of energy storaging product and battery apparatus association area, the power supply that can carry out two-way changing is produced Product demand is also more and more, while in view of the compatibility of different product, corresponding voltage range is also more and more wider, therefore conventional Realize that two-way changing does not possess cost advantage using two sets of circuits (charging, electric discharge), while common circuit is being imitated Rate and meet also there is deficiency in terms of wide-voltage range；Exist in the more use of the existing solution of product of one direction work A winding is added on transformer, with reference to figure 1, winding needs to switch over access with Switch device S1 according to voltage；With reference to Fig. 2, and if necessary to the voltage using two coils, then needing two-way switches switch S1, S2, same on the basis of original Transformer Multiple coil then means that each voltage group is required for adding switching device, then circuit can seem sufficiently complex, and efficiency meeting Reduce.If twocouese works, with reference to figure 3, although the commutation diode of transformer secondary output is replaced by into HF switch pipe, The shortcomings that circuit complexity and low efficiency, can still be present, while the power output of the single phase transformer is also limited, if according to Conventional reasoning adds a foregoing unit to expand power, and circuit is more complicated, and cost performance is very low.
The content of the invention
The main object of the present invention is aiming at the deficiencies in the prior art, there is provided a kind of two-way Sofe Switch direct current of wide scope becomes Change circuit and its control method.
The present invention uses following technical scheme：
A kind of two-way Sofe Switch DC transfer circuit of wide scope, including it is at least one first sub- translation circuit, at least one Second sub- translation circuit and at least one controller；The first sub- translation circuit includes the first series-resonant inverting circuit, the One high-frequency isolation transformer, share bridge arm and the first bridge arm；The second sub- translation circuit includes the second series-resonant inverting electricity Road, the second high-frequency isolation transformer and the second bridge arm；The side of first and second series-resonant inverting circuit be used for it is first straight Flow side connection, the opposite side of first and second series-resonant inverting circuit original with first and second high-frequency isolation transformer respectively The both ends connection on side；The controller is used to control first and second series-resonant inverting circuit, the shared bridge arm, the institute State the first bridge arm and second bridge arm；In one end of the secondary of first high-frequency isolation transformer and first bridge arm Between put connection, the other end is connected with the intermediate point of the shared bridge arm；One end of the secondary of second high-frequency isolation transformer It is connected with the intermediate point of the shared bridge arm, the other end is connected with the intermediate point of second bridge arm；The two of the shared bridge arm End is connected to form first via rectification circuit respectively with the both ends of first bridge arm；The both ends of the shared bridge arm and described second The both ends of bridge arm connect to form No. second rectification circuit respectively；The both ends of the first via rectification circuit, second tunnel rectification The both ends of circuit are used to be connected with the second DC side；The voltage and need just that the controller exports according to translation circuit needs To still reverse operation, sequential and the break-make of the control shared bridge arm are opened in control forward or backwards becomes first son Change circuit, the second sub- translation circuit forward or backwards alone or in combination output voltage to realize wide scope two-way changing.
In some preferred embodiments, the first series-resonant inverting circuit include two HF switch pipe Q3A and Q4A, the first drive circuit, the first filter capacitor, the first resonant capacitance and the first resonant inductance, the HF switch pipe Q3A's Source electrode connects the drain electrode of the HF switch pipe Q4A, one end of first resonant capacitance and the one of first filter capacitor End connection, the drain electrode of the HF switch pipe Q3A are connected with the other end of first filter capacitor, the HF switch pipe Q4A source electrode is connected with the other end of first resonant capacitance, and an input of the first high-frequency isolation transformer passes through institute State the intermediate point that the first resonant inductance is connected to the HF switch pipe Q3A and the HF switch pipe Q4A, first high frequency Another input of isolating transformer is connected with the intermediate point of first resonant capacitance and first filter capacitor, described First drive circuit is connected with the HF switch pipe Q3A and the HF switch pipe Q4A；
Second series-resonant inverting circuit includes two HF switch pipe Q3B, Q4B, the second drive circuit, the second filtered electricals Hold, the second resonant capacitance and the second resonant inductance, the source electrode of the HF switch pipe Q3B connect the HF switch pipe Q4B's Drain electrode, one end of second resonant capacitance are connected with one end of second filter capacitor, the leakage of the HF switch pipe Q3B Pole is connected with the other end of second filter capacitor, source electrode and second resonant capacitance of the HF switch pipe Q4B The other end connects, and an input of the second high-frequency isolation transformer is connected to the high frequency by second resonant inductance and opened Close pipe Q3B and the HF switch pipe Q4B intermediate point, another input of second high-frequency isolation transformer with it is described Second resonant capacitance connects with the intermediate point of second filter capacitor, second drive circuit and the HF switch pipe Q3B connects with the HF switch pipe Q4B；
The shared bridge arm includes two HF switch pipes Q11A and Q12A, the drain electrode of the HF switch pipe Q12A and institute State HF switch pipe Q11A source electrode connection；
First bridge arm includes two HF switch pipes Q9A and Q10A, the drain electrode of the HF switch pipe Q10A and institute State HF switch pipe Q9A source electrode connection；
Second bridge arm includes two HF switch pipes Q9B and Q10B, the drain electrode of the HF switch pipe Q10B and institute State HF switch pipe Q9B source electrode connection.
In some preferred embodiments, the form of first and second series-resonant inverting circuit includes semibridge system Circuit and full bridge circuit.
In some preferred embodiments, first DC side, second DC side are that can provide or can Absorb the device or circuit of energy.
On the other hand, the present invention also provides a kind of control method of the two-way Sofe Switch DC transfer circuit of wide scope, bag Include following steps：
Detection translation circuit needs the voltage exported and detection translation circuit to need positive or reverse operation；It is described just Refer to the first DC side to work for input, the second DC side is output；The reverse operation refers to the second DC side for input, First DC side is output；
The working condition of translation circuit is controlled according to testing result, including：If desired the first sub- translation circuit or the second son Translation circuit output voltage, then the first sub- translation circuit or the second sub- translation circuit is controlled to enter working condition；If desired first The output voltage sum of sub- translation circuit and the second sub- translation circuit, then control the first sub- translation circuit and the second sub- translation circuit Enter working condition；
The first sub- translation circuit of the control includes into working condition：Make the first series-resonant inverting circuit, first high Frequency isolating transformer, shared bridge arm and the first bridge arm are operated according to LLC conversion and synchronous full-bridge rectification, forward or backwards Control is opened sequential and worked forward or backwards with realizing；
The second sub- translation circuit of the control includes into working condition：Make the second series-resonant inverting circuit, second high Frequency isolating transformer, shared bridge arm and the second bridge arm are operated according to LLC conversion and synchronous full-bridge rectification, forward or backwards Control is opened sequential and worked forward or backwards with realizing；
The first sub- translation circuit of the control and the second sub- translation circuit include into working condition：
The primary side of transformer forms LLC conversion performance loops, controls shared bridge arm not work, the first high-frequency isolation transformer Coupled voltages and the second high-frequency isolation transformer coupled voltages secondary formed overlaying relation；Make to form electricity in translation circuit Logical circulation road, so as to realize positive work；
Control shares bridge arm and not worked, the first bridge arm and the work of the second bridge arm, the secondary of the first high-frequency isolation transformer Bearing the voltage sum of bearing of voltage and the secondary of the second high-frequency isolation transformer forms current path, the primary side sense of transformer Voltage should be gone out；The primary side of transformer forms LLC conversion performance loops, realizes reverse operation.
In some preferred embodiments, the first sub- translation circuit and the second sub- translation circuit is controlled to enter work shape State, under positive working condition：According to the corresponding relation of the working frequency of series-resonant inverting circuit and resonant frequency, and according to The needs of output voltage export a positive specific frequency after controlling computing, if positive specific frequency is more than resonant frequency, It is then dropping voltage characteristic；It is boosting characteristic if positive specific frequency is less than resonant frequency.
In some preferred embodiments, the first sub- translation circuit and the second sub- translation circuit is controlled to enter work shape State, under reverse operation state：According to series-resonant inverting circuit work frequency and the corresponding relation of resonant frequency, and according to defeated The needs for going out voltage export a reverse specific frequency after controlling computing, if reversely specific frequency is more than resonant frequency, It is boosting characteristic, is dropping voltage characteristic if reversely specific frequency is less than resonant frequency.
In further preferred embodiment, the first series-resonant inverting circuit include two HF switch pipe Q3A and Q4A, the HF switch pipe Q3A source electrode connect the drain electrode of the HF switch pipe Q4A；Second series-resonant inverting circuit bag Two HF switch pipes Q3B and Q4B are included, the source electrode of the HF switch pipe Q3B connects the drain electrode of the HF switch pipe Q4B； Under reverse operation state：
When the HF switch pipe Q3A and the HF switch pipe Q3B are by positively biased, to the HF switch pipe Q3A and institute State HF switch pipe Q3B and apply driving voltage to form synchronous rectification.
In further preferred embodiment, the HF switch pipe (Q4A) and the HF switch pipe Q4B are by positively biased When, apply driving voltage to the HF switch pipe Q4A and HF switch pipe Q4B to form synchronous rectification.
The present invention also provides a kind of electrical energy changer, including signal processor, memory and one or more programs, institute State one or more programs to be stored in the memory, and be configured to be performed by the signal processor, the journey Sequence includes being used for the instruction for performing the above method.
Compared with prior art, beneficial effects of the present invention have：
Avoid the circuit complexity brought in the two-way HF switch led to of transformer circuit series connection and loss, multiplexing Share bridge arm so that simple circuit, control are simple, and control forward or backwards opens sequential to realize two-way changing, has high property Valency ratio, it is efficiency high when the work of different voltage sections, reliable.By control, the first high-frequency isolation transformer, the second high frequency can be made Translation circuit where isolating transformer is independent or combines output voltage simultaneously, can export different voltages, particularly combine Output voltage is superimposed during output voltage, the work of wide scope can be met.
In a preferred embodiment, the present invention also has the advantages that：
Further, inverter circuit uses full bridge circuit, the input current of translation circuit is identical, input voltage also phase With in the case of, the original edge voltage of full bridge circuit is twice of half bridge circuit, then the output work of power full formula circuit Rate is twice of half bridge circuit, namely full bridge circuit is adapted to high-power output.
Brief description of the drawings
Fig. 1 is a kind of structural representation of DC transfer circuit of the prior art；
Fig. 2 is a kind of structural representation of Fig. 1 variant；
The electrical block diagram of transformer secondary when Fig. 3 is the circuit twocouese work in Fig. 1；
Fig. 4 is the electrical block diagram of the present invention；
Fig. 5 is the flow chart of the control method of the present invention；
Control sequential figure when Fig. 6 is the positive work of the circuit of the present invention；
Control sequential figure when Fig. 7 is the reverse operation of the circuit of the present invention；
Fig. 8 is a kind of electrical block diagram of mode of texturing of the present invention.
Embodiment
Embodiments of the present invention are elaborated below.It is emphasized that what the description below was merely exemplary, The scope being not intended to be limiting of the invention and its application.
With reference to figure 4, a kind of two-way Sofe Switch DC transfer circuit of wide scope, including the first sub- translation circuit and the second son become Circuit is changed, specifically includes first and second series-resonant inverting circuit 210 and 220, first and second high-frequency isolation transformer TRA And TRB, share bridge arm 330, first and second bridge arm 310 and 320 and controller 400；First and second series-resonant inverting circuit 210 and 220 side be used for be connected with the first DC side 110, first and second series-resonant inverting circuit 210 and 220 it is another Side respectively with first and second high-frequency isolation transformer TRAAnd TRBPrimary side both ends connection；Controller 400 is used to control the One and the second series-resonant inverting circuit 210 and 220, share bridge arm 330, first and second bridge arm 310 and 320；First high frequency Isolating transformer TRAOne end 1A of secondary be connected with the intermediate point of the first bridge arm 310, other end 2A with shared bridge arm 330 Between put connection；Second high-frequency isolation transformer TRBOne end 1B of secondary be connected with the intermediate point of shared bridge arm 330, other end 2B It is connected with the intermediate point of the second bridge arm 320；The both ends for sharing bridge arm 330 are connected to form the first via respectively with the both ends of the first bridge arm Rectification circuit；The both ends for sharing bridge arm 330 are connected to form No. second rectification circuit respectively with the both ends of the second bridge arm 320；First The both ends of road rectification circuit, the both ends of No. second rectification circuit are used to be connected with the second DC side 120；With regard to the first sub- translation circuit For, it includes the first series-resonant inverting circuit 210, the first high-frequency isolation transformer TRA, share bridge arm 330, the first bridge arm 310；For the second sub- translation circuit, it includes the second series-resonant inverting circuit 220, the second high-frequency isolation transformer TRB、 Share bridge arm 330, the second bridge arm 320.First sub- translation circuit and the second sub- translation circuit are two independent different circuits, can Individually to export or input, output or input can also be combined simultaneously, controlled respectively by controller 400；Controller 400 is according to change Voltage and needs forward direction or reverse operation that circuit needs to export are changed, control forward or backwards opens sequential and control altogether Make the first sub- translation circuit, the second sub- translation circuit output voltage alone or in combination forward or backwards with the break-make of bridge arm 330 To realize wide scope two-way changing.
It is specifically, high with reference to figure 4, the first series-resonant inverting circuit 210, the second series-resonant inverting circuit 220, first Frequency isolating transformer TRAWith the second high-frequency isolation transformer TRBQuantity be one, the He of the first series-resonant inverting circuit 210 Second series-resonant inverting circuit 220 is half bridge circuit, shares bridge arm 330, the first bridge arm 310, the rectification of the second bridge arm 320 Element is the HF switch pipe for possessing anti-parallel diodes.First series-resonant inverting circuit 210 is opened including two high frequencies Close pipe Q3A and Q4A, the first drive circuit 211, the first filter capacitor Cr2a, the first resonant capacitance Cr1a and the first resonant inductance Lra, HF switch pipe Q3A source electrode connection HF switch pipe Q4A drain electrode, the first resonant capacitance Cr1a one end and the first filter Ripple electric capacity Cr2a one end connection, HF switch pipe Q3A drain electrode are connected with the first filter capacitor Cr2a other end, and high frequency is opened The source electrode for closing pipe Q4A is connected with the first resonant capacitance Cr1a other end, the first high-frequency isolation transformer TRAAn input 4A is connected to HF switch pipe Q3A and HF switch pipe Q4A intermediate point, the first high-frequency isolation by the first resonant inductance Lra Transformer TRAAnother input 5A be connected with the first resonant capacitance Cr1a with the first filter capacitor Cr2a intermediate point, first Drive circuit 211 is connected with HF switch pipe Q3A and HF switch pipe Q4A.
Second series-resonant inverting circuit bag 220 includes two HF switch pipes Q3B and Q4B, the second drive circuit 221, Two filter capacitor Cr2b, the second resonant capacitance Cr1b and the second resonant inductance Lrb, HF switch pipe Q3B source electrode connection high frequency Switching tube Q4B drain electrode, the second resonant capacitance Cr1b one end are connected with the second filter capacitor Cr2b one end, HF switch pipe Q3B drain electrode is connected with the second filter capacitor Cr2b other end, HF switch pipe Q4B source electrode and the second resonant capacitance Cr1b The other end connection, the second high-frequency isolation transformer TRBAn input 4B high frequency is connected to by the second resonant inductance Lrb Switching tube Q3B and HF switch pipe Q4B intermediate point, the second high-frequency isolation transformer TRBAnother input 5B and second it is humorous The electric capacity Cr1b that shakes is connected with the second filter capacitor Cr2b intermediate point, the second drive circuit 221 and HF switch pipe Q3B and high frequency Switching tube Q4B connections；Sharing bridge arm 330 includes two HF switches pipe Q11A and Q12A, HF switch pipe Q12A drain electrode and HF switch pipe Q11A source electrode connection；
First bridge arm 310 includes two HF switches pipe Q9A and Q10A, HF switch pipe Q10A drain electrode and HF switch Pipe Q9A source electrode connection.
Second bridge arm 320 includes two HF switches pipe Q9B and Q10B, HF switch pipe Q10B drain electrode and HF switch Pipe Q9B source electrode connection.
With reference to figure 4, the first bridge arm 310 and shared bridge arm 330 are connected with the 3rd drive circuit 303, the second bridge arm 320 with 4th drive circuit 304 connects, and controller 400 sends control signals to the 3rd drive circuit 303 and the 4th drive circuit 304, So as to control the break-make of the first bridge arm 310, the second bridge arm 320 and shared bridge arm 330；First high-frequency isolation transformer TRASecondary One end 1A draws the intermediate point that a lead O is connected to the first bridge arm 310, and other end 2A is connected and drawn with shared bridge arm 330 One lead A；Second high-frequency isolation transformer TRBOne end 1B also accordingly draw a lead A and the first high-frequency isolation transformer TRALead A connections, with the first high-frequency isolation transformer TRAIt is multiplexed together and shares bridge arm 330, other end 2B is then connected to second One lead B of intermediate point and extraction of bridge arm 320.
Filter capacitor Cr2a, resonant capacitance Cr1a, resonant inductance Lra, HF switch pipe in first sub- translation circuit Q3A, HF switch pipe Q4A parameter are identical with the second sub- translation circuit, the first high-frequency isolation transformer TRAPrimary side around Group and the second high-frequency isolation transformer TRBIt is consistent.
First DC side 110, the second DC side 120 are the device or circuit that can provide either energy-absorbing, its In one as input, another then as output.First DC side 110 includes DC source V1 and high-voltage energy storage filter capacitor C1, high-voltage energy storage filter capacitor C1 positive and negative both ends are connected with DC source V1 positive and negative both ends respectively.Second DC side includes straight Both ends of stream source V2 and filter capacitor C2, filter capacitor the C2 both ends respectively with DC source V2 are connected.DC source V1 and V2 shape Formula includes the power supply after dc source, battery and AC rectification conversion.Certainly, high-voltage energy storage filter capacitor C1 and filter capacitor C2 It can also bring into the first sub- translation circuit or the second sub- translation circuit, the present invention is not limited thereto.
The input sample signal of one end 401 of controller 400, the other end 402 export sampled signal.With reference to figure 4, in transformer Primary side, the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 are approximate relations in parallel, both Both ends+BUS and-BUS after parallel connection with high-voltage energy storage filter capacitor C1 are connected, namely the first series-resonant inverting circuit 210 with Both ends after the parallel connection of second series-resonant inverting circuit 220 are connected with DC source V1.In the secondary of transformer, first via rectified current The both ends of the both ends on road, the both ends of No. second rectification circuit with filter capacitor C2 are connected, namely the two of first via rectification circuit End, the both ends of No. second rectification circuit are connected with DC source V2.
HF switch pipe Q3A and Q4A, the first filter capacitor in DC source V1 side, the first sub- translation circuit Cr2a, the first resonant capacitance Cr1a and the first resonant inductance Lra are identical with the second sub- translation circuit, and the first high-frequency isolation becomes Depressor TRAWith the second high-frequency isolation transformer TRBPrimary side winding it is also consistent.
With reference to figure 5, the two-way Sofe Switch DC transfer circuit of wide scope of the invention uses following control method：
Detection translation circuit needs the voltage exported and detection translation circuit to need positive or reverse operation；Positive work Work refers to the first DC side 110 for input, and the second DC side 120 is output；Reverse operation refers to that the second DC side 120 is defeated Enter, the first DC side 110 is output.Due to first, second sub- translation circuit be present, they both can individually be exported, can also Simultaneously combine output, moreover, the first DC side 110, the second DC side 120 be can provide or the device of energy-absorbing or Person's circuit, then can realizes two-way changing, can meet the needs of different occasions, it is therefore desirable to determine first, second son How translation circuit works.
The working condition of translation circuit is controlled according to testing result, including：If desired the first sub- translation circuit or the second son Translation circuit output voltage, then the first sub- translation circuit or the second sub- translation circuit is controlled to enter working condition；If desired first The output voltage sum of sub- translation circuit and the second sub- translation circuit, then control the first sub- translation circuit and the second sub- translation circuit Enter working condition.That is, according to testing result, first, second sub- translation circuit is controlled to carry out work by controller 400 Make, including which strip translation circuit is opened and positive or reverse operation.
The first sub- translation circuit is controlled to include into working condition：Make the first series-resonant inverting circuit 210, the first high frequency Isolating transformer TRA, share that the bridge arm 310 of bridge arm 330 and first is converted according to LLC and synchronous full-bridge rectification is operated, it is positive Or Reverse Turning Control is opened sequential and worked forward or backwards with realizing.It is specific as follows：
As the first high-frequency isolation transformer T of needsRAThe translation circuit at place forward or backwards output voltage when, namely first Output voltage, controller 400 control open sequential forward or backwards, send signal, make first sub- translation circuit forward or backwards Sub- translation circuit work.First high-frequency isolation transformer TRAPrimary side be half-bridge LLC transformation loops, secondary is by sharing bridge arm 330 Synchronous full bridge rectifier is formed with the first bridge arm 310, now the second bridge arm 320 does not work.According to the half-bridge or full-bridge of routine LLC is converted and the control principle of synchronous full-bridge rectification is controlled.
The second sub- translation circuit is controlled to include into working condition：Make the second series-resonant inverting circuit, the second high frequency every From transformer, shared bridge arm and the second bridge arm is converted according to LLC and synchronous full-bridge rectification is operated, and controls forward or backwards Open sequential and worked forward or backwards with realizing.It is specific as follows：
As the second high-frequency isolation transformer T of needsRBThe translation circuit at place forward or backwards output voltage when, namely second Output voltage, controller 400 control open sequential forward or backwards, send signal, make second sub- translation circuit forward or backwards Sub- translation circuit work.Second high-frequency isolation transformer TRBPrimary side be half-bridge LLC transformation loops, secondary is by sharing bridge arm 330 Synchronous full bridge rectifier is formed with the second bridge arm 320, now the first bridge arm 310 does not work.According to the half-bridge or full-bridge of routine LLC is converted and the control principle of synchronous full-bridge rectification is controlled.
The first sub- translation circuit and the second sub- translation circuit is controlled to include into working condition：
The primary side of transformer forms LLC conversion performance loops, controls shared bridge arm 330 not work, the first high-frequency isolation becomes Depressor TRACoupled voltages and the second high-frequency isolation transformer TRBCoupled voltages secondary formed overlaying relation；Make conversion electric Current path is formed in road, so as to realize positive work.It is specific as follows：
When the first sub- translation circuit of needs and the second sub- translation circuit work joint output voltage together, then pass through control Device 400 controls the high frequency of the sub- translation circuits of HF switch pipe Q3A, Q4A, Q9A, Q10A and second in the first sub- translation circuit Switching tube Q3B, Q4B, Q9B, Q10B break-make, HF switch the pipe Q11A and Q12A now shared in bridge arm 330 do not work.
Control sequential is with reference to figure 6, and HF switch pipe Q3A and Q3B is open-minded, or HF switch pipe Q4A and Q4B open-minded, then The performance loop of resonance oscillation semi-bridge is formed in the primary side of two transformers；After HF switch pipe Q3A and Q3B are opened, two transformers The coupled voltages of secondary be respectively VTa and VTb, according to Same Name of Ends principle, upper just lower negative, the two voltages can natural shape bunchiness Connection relation, shared bridge arm 330, which is equal to, to be not present, and therefore, O lead ends end is just, B lead ends is negative；When coupled voltages VTa with When coupled voltages VTb sums are more than DC source V2 voltage or make HF switch pipe Q9A and Q10B diode positively biased, electric current Path is formed, so as to output voltage.Similarly, after HF switch pipe Q4A and Q4B are opened, the coupling of the secondary of two transformers Voltage is respectively VTa and VTb, according to Same Name of Ends principle, it is upper it is negative under just, the two voltages also can self-assembling formation series relationship, altogether It is equal to bridge arm 330 and is not present, therefore, O lead ends is negative, and B lead ends is just；As coupled voltages VTa and coupled voltages VTb When sum is more than DC source V2 voltage or makes HF switch pipe Q10A and Q9B diode positively biased, current path is formed, from And output voltage.
Further, the first sub- translation circuit and the second sub- translation circuit is controlled to enter working condition, forward direction work shape Under state：According to the corresponding relation of the working frequency of series-resonant inverting circuit and resonant frequency, and the need according to output voltage A positive specific frequency is exported after controlling computing, is dropping voltage characteristic if positive specific frequency is more than resonant frequency； It is boosting characteristic if positive specific frequency is less than resonant frequency.Specifically, if dropping voltage characteristic, then transformer secondary HF switch pipe Q9A and Q10B it is open-minded, or HF switch pipe Q10A and Q9B be open-minded, with reference to figure 6, they when opening Between can move afterwards relatively, the turn-off time can level off to HF switch pipe Q3A or Q3B, while be opened according to the reduction of load current size The logical time；If boosting characteristic, with reference to figure 7, their service time, the turn-off time can court in addition to it can move afterwards relatively Off-centring, the front and rear turn-off time is set to level off to symmetrically.
Control shares bridge arm 330 and not worked, and the first bridge arm 310 and the second bridge arm 320 work, the first high-frequency isolation transformer TRASecondary bear voltage and the second high-frequency isolation transformer TRBThe voltage sum of bearing of secondary form current path, The primary side of transformer induces voltage；The primary side of transformer forms LLC conversion performance loops, realizes reverse operation.It is specific as follows：
When the first sub- translation circuit of needs and the second sub- translation circuit work joint output voltage together, then pass through control Device 400 controls the high frequency of the sub- translation circuits of HF switch pipe Q3A, Q4A, Q9A, Q10A and second in the first sub- translation circuit Switching tube Q3B, Q4B, Q9B, Q10B break-make, HF switch the pipe Q11A and Q12A now shared in bridge arm 330 do not work.
Control sequential is with reference to figure 7, and after HF switch pipe Q9A and Q10B are opened, the secondary of two transformers can be according to equivalent Impedance is respectively subjected to voltage VTa and VTb automatically, and according to Same Name of Ends principle, upper just lower negative, shared bridge arm 330 is not opened equivalent In in the absence of therefore, O lead ends is just, B lead ends are negative, i.e. voltage VTa is approximately equal to DC source V2 with voltage VTb sums Voltage, current path formed, and now the primary coil of two transformers can induce voltage, because both in parallel close to be approximate System, therefore its partial pressure that can be connected to voltage VTa and VTb have and reversely clamp down on effect.Now primary side induced voltage 4A, 4B ends is just, 5A, 5B end are negative, and therefore, when HF switch pipe Q3A and Q3B is by positively biased, electric current can be exported to the first DC side 110, if Apply driving voltage to HF switch pipe Q3A and Q3B, then form the relation of synchronous rectification；Similarly, HF switch pipe Q9B and After Q10A is opened, the secondary of two transformers is respectively subjected to voltage VTa and VTb, according to Same Name of Ends principle, it is upper it is negative under just, it is former Shared bridge arm 330, which is not opened to be equal to, to be not present；Therefore, i.e., O lead ends are negative, and B lead ends are just voltage VTa and voltage VTb Sum is approximately equal to DC source V2 voltage, and current path is formed, and the primary coil of two transformers can induce voltage, due to Both be approximate parallel relationship, therefore its partial pressure that can be connected to voltage VTa and VTb have and reversely clamp down on effect, now primary side sensing Voltage 5A, 5B ends is just, and 4A, 4B end are negative, and therefore, when HF switch pipe Q4A and Q4B is by positively biased, electric current can be exported to the One DC side 110, if applying driving voltage to HF switch pipe Q4A and Q4B, form the relation of synchronous rectification.
Further, the first sub- translation circuit and the second sub- translation circuit is controlled to enter working condition, reverse operation shape Under state：According to series-resonant inverting circuit work frequency and the corresponding relation of resonant frequency, and the needs according to output voltage A reverse specific frequency is exported after controlling computing, is boosting characteristic, such as if reversely specific frequency is more than resonant frequency The reverse specific frequency of fruit is less than resonant frequency, then is dropping voltage characteristic.If dropping voltage characteristic, the HF switch pipe of transformer secondary Q3A and Q3B, or HF switch pipe Q4A and Q4B, the time that can be opened according to load current size and voltage reduction.
Understood according to above-mentioned, present invention, avoiding the circuit brought in the two-way HF switch led to of transformer circuit series connection Complexity and loss, it is multiplexed and shares bridge arm so that simple circuit, control is simple, and control forward or backwards opens sequential with reality Existing two-way changing, improves cost performance, efficiency high when different voltage sections work, reliable.By control, can make the first high frequency every Individually or simultaneously combine output voltage from the translation circuit where transformer, the second high-frequency isolation transformer, can export not Same voltage, output voltage is superimposed when particularly combining output voltage, the work of wide scope can be met.In addition, utilize The mode of resonance of first and second series-resonant inverting circuit can realize Sofe Switch, can reduce each electronic component in inverter circuit Stress is opened and turned off, so as to reduce switching loss, is favorably improved the working frequency or efficiency of inverter circuit, and then reduce Volume improves power density.
The present invention is described above, but the present invention can also have the form of some modifications, such as：
With reference to figure 8, the form of the first series-resonant inverting circuit 210 and the second series-resonant inverting circuit 220 can be with It is full bridge circuit；Inverter circuit uses full bridge circuit, the input current of translation circuit is identical, input voltage also identical In the case of, the original edge voltage of full bridge circuit is twice of half bridge circuit, then the power output of power full formula circuit is Twice of half bridge circuit, namely full bridge circuit are adapted to high-power output；
If necessary to broader output voltage, then a way translation circuit is further added by, two leads of corresponding transformer are B And C, share the second bridge arm 320 of original, the newly-increased conversion bridge arm being connected with lead C.
The present invention also provides a kind of electrical energy changer, including signal processor, memory and one or more programs, and one Individual or multiple programs are stored in memory, and are configured to be performed by signal processor, and program includes being used to perform State the instruction of method.
Above content is to combine specific/preferred embodiment further description made for the present invention, it is impossible to is recognized The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention, Without departing from the inventive concept of the premise, it can also make some replacements or modification to the embodiment that these have been described, And these are substituted or variant should all be considered as belonging to protection scope of the present invention.

Claims (10)

  1. A kind of 1. two-way Sofe Switch DC transfer circuit of wide scope, it is characterised in that：Including at least one first sub- translation circuit, At least one second sub- translation circuit and at least one controller；The first sub- translation circuit includes the first series-resonant inverting Circuit, the first high-frequency isolation transformer, share bridge arm and the first bridge arm；The second sub- translation circuit includes the second series resonance Inverter circuit, the second high-frequency isolation transformer and the second bridge arm；The side of first and second series-resonant inverting circuit be used for First DC side connects, the opposite side of first and second series-resonant inverting circuit respectively with first and second high-frequency isolation transformation The both ends connection of the primary side of device；The controller is used to controlling first and second described series-resonant inverting circuit, described shared Bridge arm, first bridge arm and second bridge arm；One end of the secondary of first high-frequency isolation transformer and described first The intermediate point connection of bridge arm, the other end are connected with the intermediate point of the shared bridge arm；The pair of second high-frequency isolation transformer The one end on side is connected with the intermediate point of the shared bridge arm, and the other end is connected with the intermediate point of second bridge arm；It is described to share The both ends of bridge arm are connected to form first via rectification circuit respectively with the both ends of first bridge arm；The both ends of the shared bridge arm with The both ends of second bridge arm connect to form No. second rectification circuit respectively；The both ends of the first via rectification circuit, described The both ends of No. two rectification circuits are used to be connected with the second DC side；The controller according to translation circuit need the voltage that exports with And positive or reverse operation is needed, control the break-make for opening sequential and the control shared bridge arm to make forward or backwards described First sub- translation circuit, the second sub- translation circuit forward or backwards alone or in combination output voltage to realize that wide scope is double To conversion.
  2. 2. the two-way Sofe Switch DC transfer circuit of wide scope according to claim 1, it is characterised in that：
    First series-resonant inverting circuit include two HF switch pipes Q3A and Q4A, the first drive circuit, the first filter capacitor, First resonant capacitance and the first resonant inductance, the source electrode of the HF switch pipe Q3A connect the leakage of the HF switch pipe Q4A Pole, one end of first resonant capacitance are connected with one end of first filter capacitor, the drain electrode of the HF switch pipe Q3A It is connected with the other end of first filter capacitor, the source electrode of the HF switch pipe Q4A is another with first resonant capacitance One end connects, and an input of the first high-frequency isolation transformer is connected to the HF switch by first resonant inductance Pipe Q3A and the HF switch pipe Q4A intermediate point, another input of first high-frequency isolation transformer and described the One resonant capacitance connects with the intermediate point of first filter capacitor, first drive circuit and the HF switch pipe Q3A Connected with the HF switch pipe Q4A；
    Second series-resonant inverting circuit include two HF switch pipe Q3B, Q4B, the second drive circuit, the second filter capacitor, Second resonant capacitance and the second resonant inductance, the source electrode of the HF switch pipe Q3B connect the leakage of the HF switch pipe Q4B Pole, one end of second resonant capacitance are connected with one end of second filter capacitor, the drain electrode of the HF switch pipe Q3B It is connected with the other end of second filter capacitor, the source electrode of the HF switch pipe Q4B is another with second resonant capacitance One end connects, and an input of the second high-frequency isolation transformer is connected to the HF switch by second resonant inductance Pipe Q3B and the HF switch pipe Q4B intermediate point, another input of second high-frequency isolation transformer and described the Two resonant capacitances connect with the intermediate point of second filter capacitor, second drive circuit and the HF switch pipe Q3B Connected with the HF switch pipe Q4B；
    The shared bridge arm includes two HF switch pipes Q11A and Q12A, drain electrode and the height of the HF switch pipe Q12A Frequency switching tube Q11A source electrode connection；
    First bridge arm includes two HF switch pipes Q9A and Q10A, drain electrode and the height of the HF switch pipe Q10A Frequency switching tube Q9A source electrode connection；
    Second bridge arm includes two HF switch pipes Q9B and Q10B, drain electrode and the height of the HF switch pipe Q10B Frequency switching tube Q9B source electrode connection.
  3. 3. the two-way Sofe Switch DC transfer circuit of wide scope according to claim 1, it is characterised in that：Described first and The form of two series-resonant inverting circuits includes half bridge circuit and full bridge circuit.
  4. 4. the two-way Sofe Switch DC transfer circuit of wide scope according to any one of claims 1 to 3, it is characterised in that：Institute State the first DC side, second DC side is the device or circuit that can provide either energy-absorbing.
  5. 5. a kind of control method of the two-way Sofe Switch DC transfer circuit of wide scope, it is characterised in that comprise the following steps：
    Detection translation circuit needs the voltage exported and detection translation circuit to need positive or reverse operation；The positive work Work refers to the first DC side for input, and the second DC side is output；The reverse operation refers to the second DC side for input, first DC side is output；
    The working condition of translation circuit is controlled according to testing result, including：If desired the first sub- translation circuit or the second son conversion Circuit output voltage, then the first sub- translation circuit or the second sub- translation circuit is controlled to enter working condition；If desired the first son becomes The output voltage sum of circuit and the second sub- translation circuit is changed, then controls the first sub- translation circuit and the second sub- translation circuit to enter Enter working condition；
    The first sub- translation circuit of the control includes into working condition：Make the first series-resonant inverting circuit, the first high frequency every From transformer, shared bridge arm and the first bridge arm is converted according to LLC and synchronous full-bridge rectification is operated, and controls forward or backwards Open sequential and worked forward or backwards with realizing；
    The second sub- translation circuit of the control includes into working condition：Make the second series-resonant inverting circuit, the second high frequency every From transformer, shared bridge arm and the second bridge arm is converted according to LLC and synchronous full-bridge rectification is operated, and controls forward or backwards Open sequential and worked forward or backwards with realizing；
    The first sub- translation circuit of the control and the second sub- translation circuit include into working condition：
    The primary side of transformer forms LLC conversion performance loops, controls shared bridge arm not work, the coupling of the first high-frequency isolation transformer The coupled voltages for closing voltage and the second high-frequency isolation transformer form overlaying relation in secondary；Lead to formation electric current in translation circuit Road, so as to realize positive work；
    Control shares bridge arm and not worked, and the first bridge arm and the work of the second bridge arm, the secondary of the first high-frequency isolation transformer are born The voltage sum of bearing of voltage and the secondary of the second high-frequency isolation transformer forms current path, and the primary side of transformer induces Voltage；The primary side of transformer forms LLC conversion performance loops, realizes reverse operation.
  6. 6. control method according to claim 5, it is characterised in that the first sub- translation circuit of control and the second son conversion electricity Road enters working condition, under positive working condition：According to pair of the working frequency of series-resonant inverting circuit and resonant frequency It should be related to, and a positive specific frequency is exported after controlling computing according to the needs of output voltage, if positive specific frequency Rate is more than resonant frequency, then is dropping voltage characteristic；It is boosting characteristic if positive specific frequency is less than resonant frequency.
  7. 7. control method according to claim 5, it is characterised in that the first sub- translation circuit of control and the second son conversion electricity Road enters working condition, under reverse operation state：It is corresponding with resonant frequency according to series-resonant inverting circuit work frequency Relation, and a reverse specific frequency is exported after controlling computing according to the needs of output voltage, if reverse specific frequency More than resonant frequency, then it is boosting characteristic, is dropping voltage characteristic if reversely specific frequency is less than resonant frequency.
  8. 8. the control method according to claim 5 or 7, it is characterised in that：First series-resonant inverting circuit includes two HF switch pipe Q3A and Q4A, the source electrode of the HF switch pipe Q3A connect the drain electrode of the HF switch pipe Q4A；Second string Joining resonance inversion circuit includes two HF switch pipes Q3B and Q4B, and the source electrode of the HF switch pipe Q3B connects the high frequency Switching tube Q4B drain electrode；Under reverse operation state：
    When the HF switch pipe Q3A and the HF switch pipe Q3B are by positively biased, to the HF switch pipe Q3A and the height Frequency switching tube Q3B applies driving voltage to form synchronous rectification.
  9. 9. control method according to claim 8, it is characterised in that：The HF switch pipe (Q4A) and the high frequency are opened When closing pipe Q4B by positively biased, apply driving voltage to the HF switch pipe Q4A and HF switch pipe Q4B to form synchronization Rectification.
  10. 10. a kind of electrical energy changer, including signal processor, memory and one or more programs, one or more of Program is stored in the memory, and is configured to be performed by the signal processor, and described program includes being used to hold The instruction of method of the row as described in claim any one of 5-9.
CN201711025676.6A 2017-10-27 2017-10-27 A kind of two-way Sofe Switch DC transfer circuit of wide scope and its control method Active CN107733236B (en)

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CN109039121A (en) * 2018-10-31 2018-12-18 深圳市高益智能电气有限公司 A kind of high-frequency isolation type ac-dc conversion circuit and its control method
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CN114268213A (en) * 2022-03-01 2022-04-01 常州索维尔电子科技有限公司 Soft switching circuit based on LLC circuit, control method and control device
CN116614003A (en) * 2023-07-20 2023-08-18 深圳市能效电气技术有限公司 Isolated bidirectional DC/DC conversion circuit
CN116614003B (en) * 2023-07-20 2024-03-15 深圳市能效电气技术有限公司 Isolated bidirectional DC/DC conversion circuit

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