CN107800320A - A kind of circuit control method - Google Patents

A kind of circuit control method Download PDF

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Publication number
CN107800320A
CN107800320A CN201710888673.9A CN201710888673A CN107800320A CN 107800320 A CN107800320 A CN 107800320A CN 201710888673 A CN201710888673 A CN 201710888673A CN 107800320 A CN107800320 A CN 107800320A
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CN
China
Prior art keywords
sequential
switching tube
high frequency
circuit
half bridge
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Pending
Application number
CN201710888673.9A
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Chinese (zh)
Inventor
李伦全
郑车晓
谢立海
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SHENZHEN BOYN ELECTRIC Co Ltd
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SHENZHEN BOYN ELECTRIC Co Ltd
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Priority to CN201710888673.9A priority Critical patent/CN107800320A/en
Publication of CN107800320A publication Critical patent/CN107800320A/en
Pending legal-status Critical Current

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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
    • 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
    • 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

Abstract

A kind of circuit control method, for controlling high-frequency isolation ac-dc conversion circuit switching working mode：Control three-phase full-bridge inverting circuit works in PFC rectification states and boosted；First, second high frequency half bridge inverter circuit is controlled to work in inverter mode；If DC source receives electric current more than or equal to 0.1 times of rated current, drive the first and second rectification circuits open-minded with pwm signal；The on/off sequential of first, second rectification circuit enters line displacement based on the center of the on/off sequential of first, second high frequency half bridge inverter circuit respectively, and dutycycle size is opened to improve efficiency according to switching frequency adjustment, to work in rectification mode；First, second high frequency half bridge inverter circuit is controlled to carry out on/off based on the center of the on/off sequential of first, second rectification circuit respectively according to the voltage of DC source, and enter line displacement according to the voltage levels of DC source and adjustment opens dutycycle size to improve efficiency, to work in inverter mode.

Description

A kind of circuit control method
Technical field
The present invention relates to a kind of control method of efficient high-frequency isolation ac-dc conversion circuit.
Background technology
Needing carry out alternating current-direct current two-way changing (i.e. discharge and recharge) application scenario, as energy storage inverter, off-network inverter, The links such as Battery Plant's aging chemical conversion, detection, mostly based on low frequency isolation scheme, the two-way change of mainly high-frequency isolation of tracing it to its cause Change that technology is complex, while the HF switch loss caused by high frequency conversion causes efficiency low, loses more than gain.And low frequency becomes Depressor isolation technology relative maturity is stable, but for relative high frequency isolation technology, its shortcoming is also apparent from：The method of low frequency isolation Middle volume of transformer Pang is necessarily large and bulky, therefore is difficult to promote in many application scenarios, using limited.Thus, it is thus proposed that two kinds More compromise scheme：A kind of is to use the method for separating charge-discharge circuit, realizes the high frequency of transformer isolation, volume has Certain diminution, efficiency can also be higher, but relative volume or larger；Another is using having two-way changing function Circuit, certain efficiency is sacrificed, realize the high frequency of isolation, so can largely reduce volume, and relative to unidirectional Converter technique, power density and efficiency improve, but efficiency has still made certain sacrifice.
Therefore, it is necessary to a kind of new circuit is designed, can by rational translation circuit and suitable control method To realize high power density, high efficiency and electrical isolation, while the relatively wide-voltage range of different battery types can be met again Conversion.
The content of the invention
It is a primary object of the present invention to propose a kind of circuit control method, a high-frequency isolation ac-dc conversion circuit is controlled Switch between rectification mode and inverter mode and work, to solve existing alternating current-direct current two-way changing complex circuit designs, be difficult to Realize high-frequency isolation and ineffective technical problem.
One embodiment of the invention proposes a kind of circuit control method, for controlling a high-frequency isolation ac-dc conversion circuit The switch operating between rectification mode and inverter mode；The translation circuit by a three-phase alternating current source, a DC source, to described three Filter circuit that cross streams source is filtered, filter capacitor, high-voltage energy storage wave filter, the three phase full bridge for being parallel to the DC source Inverter circuit, the first to the second high frequency half bridge inverter circuit, the first to the second inductance, the first to the second high-frequency isolation transformer, The first to the second rectification circuit, the drive circuit for driving switch pipe and the control circuit structure being connected with the drive circuit Into；Wherein, first and second high-frequency isolation transformer be respectively provided with positioned at the first to the 3rd end of the DC source side with And positioned at the 4th and the 5th end of three-phase alternating current source side；
The filter circuit is connected to the exchanging between end of the three-phase alternating current source and the three-phase full-bridge inverting circuit；Institute State three-phase full-bridge inverting circuit and the high-voltage energy storage wave filter is connected in parallel to by two DC terminal；
The first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit pass through respective two respectively DC terminal is connected in parallel to the high-voltage energy storage wave filter；Or the first high frequency half bridge inverter circuit and second high frequency half Bridge inverter circuit is connected, and two by being formed after series connection DC terminals are connected in parallel to the high-voltage energy storage wave filter；
First exchange end of the first high frequency half bridge inverter circuit is by first inductance connection to described first high 4th end of frequency isolating transformer, and, the second exchange end is connected to the 5th end of first high-frequency isolation transformer；
First exchange end of the second high frequency half bridge inverter circuit is by second inductance connection to described second high 4th end of frequency isolating transformer, and, the second exchange end is connected to the 5th end of second high-frequency isolation transformer；
First and second rectification circuit is the half-bridge or full bridge rectifier being made up of switching tube, and is respectively provided with Two exchange ends and two DC terminals；Two exchange ends of first rectification circuit are respectively connecting to first high-frequency isolation The first end of transformer and the 3rd end, and, two DC terminals are commonly connected to the negative pole of the DC source；Second rectification Two exchange ends of circuit are respectively connecting to first end and the 3rd end of second high-frequency isolation transformer, and, two are straight Stream end is commonly connected to the negative pole of the DC source；Second end of first and second high-frequency isolation transformer is connected to institute State the positive pole of DC source；
The control method includes：
When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC rectification states are simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；It is if described DC source receives electric current more than or equal to 0.1 times of rated current, then：First and second rectification is driven with pwm signal All switching tubes of circuit are open-minded；Wherein, the on/off sequential of the switching tube of first rectification circuit is high with described first Enter line displacement based on the center of the on/off sequential of frequency half-bridge inversion circuit, the switching tube of second rectification circuit On/off sequential enters line displacement based on the center of the on/off sequential of the second high frequency half bridge inverter circuit, and And dutycycle size is opened to improve efficiency according to switching frequency adjustment；
When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, described in control First high frequency half bridge inverter circuit based on the center of the on/off sequential of first rectification circuit open/close It is disconnected, and control the second high frequency half bridge inverter circuit using the center of the on/off sequential of second rectification circuit as Basis carry out on/off, and according to the voltage levels of the DC source enter line displacement and adjustment open dutycycle size with Improve efficiency；
Wherein, during the on/off of the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit Sequence is the same as 90 ° of phase or misphase.
Another embodiment of the present invention provides a kind of circuit control method, for controlling high-frequency isolation ac-dc conversion electricity Road switch operating between rectification mode and inverter mode；The translation circuit by a three-phase alternating current source, a DC source, to described Filter circuit that three-phase alternating current source is filtered, filter capacitor, high-voltage energy storage wave filter, the three-phase for being parallel to the DC source are complete Bridge inverter circuit, the first to the second high frequency half bridge inverter circuit, the first to the second inductance, the first to the second high-frequency isolation transformation Device, the first to the second voltage doubling rectifing circuit, the drive circuit for driving switch pipe and the control being connected with the drive circuit Circuit processed is formed；Wherein, first and second high-frequency isolation transformer is respectively provided with first positioned at the DC source side, Two ends and positioned at the three, the 4th ends of three-phase alternating current source side；
The filter circuit is connected to the exchanging between end of the three-phase alternating current source and the three-phase full-bridge inverting circuit；Institute State three-phase full-bridge inverting circuit and the high-voltage energy storage wave filter is connected in parallel to by two DC terminal；
The first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit pass through respective two respectively DC terminal is connected in parallel to the high-voltage energy storage wave filter；Or the first high frequency half bridge inverter circuit and described second high Frequency half-bridge inversion circuit is connected, and two by being formed after series connection DC terminals are connected in parallel to the high-voltage energy storage wave filter；
First exchange end of the first high frequency half bridge inverter circuit is by first inductance connection to described first high 3rd end of frequency isolating transformer, and, the second exchange end is connected to the 4th end of first high-frequency isolation transformer；
First exchange end of the second high frequency half bridge inverter circuit is by second inductance connection to described second high 3rd end of frequency isolating transformer, and, the second exchange end is connected to the 4th end of second high-frequency isolation transformer；
First and second rectification circuit is made up of two switching tubes and two electric capacity, and is respectively provided with two friendships Flow end and two DC terminals；Two exchange ends of first voltage doubling rectifing circuit are respectively connecting to first high-frequency isolation and become The first end of depressor and the second end, and, two DC terminals are connected to the positive pole and negative pole of the DC source；Described second Two exchange ends of voltage doubling rectifing circuit are respectively connecting to first end and the second end of second high-frequency isolation transformer, with And two DC terminals are connected to the positive pole and negative pole of the DC source；
The control method includes：
When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC rectification states are simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；It is if described DC source receives electric current more than or equal to 0.1 times of rated current, then：First and second multiplication of voltage is driven with pwm signal All switching tubes of rectification circuit are open-minded；Wherein, the on/off sequential of the switching tube of first voltage doubling rectifing circuit is with institute State and enter line displacement based on the center of the on/off sequential of the first high frequency half bridge inverter circuit, the second voltage multiplying rectifier electricity The on/off sequential of the switching tube on road is using the center of the on/off sequential of the second high frequency half bridge inverter circuit as base Plinth enters line displacement, and opens dutycycle size according to switching frequency adjustment to improve efficiency；
When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, described in control First high frequency half bridge inverter circuit is opened based on the center of the on/off sequential of first voltage doubling rectifing circuit Logical/shut-off, and control the second high frequency half bridge inverter circuit is with the on/off sequential of second voltage doubling rectifing circuit Center based on carry out on/off, and enter line displacement according to the voltage levels of the DC source and duty is opened in adjustment Than size to improve efficiency；
Wherein, during the on/off of the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit Sequence is the same as 90 ° of phase or misphase.
Foregoing circuit control method provided by the invention, on the basis of the DC source reference voltage of setting, according to direct current The monitoring of the real-time voltage in source, the translation circuit switch operating is controlled in rectification mode and inverter mode, and worked According to the real-time voltage of DC source and release or absorption (inverter mode in journey：Release；Rectification mode：Absorb) size of current, come Change high-frequency inversion bridge (including first, second foregoing high frequency half bridge inverter circuit) and the rectification circuit of DC source side The frequency and dutycycle size of (first, second rectification circuit or first, second voltage doubling rectifing circuit), are opened up using high-frequency inversion bridge The resonant condition flutterred realizes Sofe Switch, and reduce each switching tube in bridge inverter main circuit opens and turn off stress, reduces out Loss is closed, contributes to the working frequency of inverter circuit to improve or efficiency improves so as to improve power density and reduce volume；From And high power density is realized, high efficiency and high frequency electrical isolation.In addition, using the SECO of opening of high-frequency inversion bridge, it is real The reverse conversion of existing wide-range direct current voltage so that the topology in battery etc. compared with Width funtion excursion similar application High efficiency is obtained, is improved than traditional transducer effciency a lot.
Brief description of the drawings
Fig. 1, Fig. 2, Fig. 7 and Fig. 8 are the high-frequency isolation ac-dc conversion circuit that different embodiments of the invention provide respectively Schematic diagram；
Fig. 3 and Fig. 4 is the control method of the high-frequency isolation ac-dc conversion circuit of the present invention respectively in rectification mode Two kinds of different PWM driver' s timing figures；
Fig. 5 and Fig. 6 is the control method of the high-frequency isolation ac-dc conversion circuit of the present invention respectively in inverter mode Two kinds of different PWM driver' s timing figures.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
The wherein embodiment of the present invention discloses a kind of high-frequency isolation ac-dc conversion circuit, with reference to the He of figure 1 Fig. 2, by a three-phase alternating current source (three-phase is V1a, V1b, V1c respectively), a DC source V2, the three-phase alternating current source is filtered Filter circuit, be parallel to the DC source filter capacitor C2, high-voltage energy storage wave filter C, three-phase full-bridge inverting circuit 100, The first to the second high frequency half bridge inverter circuit 201 and the 202, the first to the second inductance L1 and L2, the first to the second high-frequency isolation become Depressor T1 and T2, the first to the second rectification circuit 301 and 302, the drive circuit for driving switch pipe and with the driving The control circuit of circuit connection is formed.Wherein, the first and second high-frequency isolation transformer T1 and T2 are respectively provided with positioned at the direct current The first of source side is to the 3rd end 11/21,12/22,13/23 and positioned at the 4th and the 5th end of three-phase alternating current source side 14/24、15/25；What the filter circuit was connected to the three-phase alternating current source and the three-phase full-bridge inverting circuit 100 exchanges end Between (port of AC signal input/output)；The three-phase full-bridge inverting circuit 100 by two DC terminal, (believe by direct current The port of number input/output) it is connected in parallel to the high-voltage energy storage wave filter C.The first high frequency half bridge inverter circuit 201 and described Second high frequency half bridge inverter circuit 201 is connected in parallel to the high-voltage energy storage wave filter C by respective two DC terminals respectively, that is, schemes Connected mode shown in 1；Or as shown in Fig. 2 the first high frequency half bridge inverter circuit 201 and second high frequency half Bridge inverter circuit 202 is connected, and two by being formed after series connection DC terminals are connected in parallel to the high-voltage energy storage wave filter C.Institute The the first exchange end for stating the first high frequency half bridge inverter circuit 201 is connected to first high-frequency isolation by the first inductance L1 Transformer T1 the 4th end 14, and, the second exchange end is connected to the 5th end 15 of the first high-frequency isolation transformer T1；Institute The the first exchange end for stating the second high frequency half bridge inverter circuit 201 is connected to second high-frequency isolation by the second inductance L2 Transformer T2 the 4th end 24, and, the second exchange end is connected to the 5th end 25 of the second high-frequency isolation transformer T2.Institute It is the half-bridge or full bridge rectifier being made up of switching tube to state the first and second rectification circuits 301,302, and is respectively provided with two Individual exchange end and two DC terminals；Two of first rectification circuit 301 exchange ends be respectively connecting to first high frequency every The end 13 of first end 11 and the 3rd from transformer T1, and, two DC terminals are commonly connected to the negative pole of the DC source V2；Institute State the first end 21 and that two of the second rectification circuit 302 exchange ends are respectively connecting to the second high-frequency isolation transformer T2 Three ends 23, and, two DC terminals are commonly connected to the negative pole of the DC source V2；The first and second high-frequency isolations transformation Second end 12,22 of device is connected to the positive pole of the DC source V2.
In a kind of specific embodiment, the filter circuit is made up of three LC filter circuits, is respectively used to described The three-phase signal in three-phase alternating current source is filtered；The exchange end of the three-phase full-bridge inverting circuit 100 has three, connects respectively In three LC filter circuits.As depicted in figs. 1 and 2, three-phase full-bridge inverting circuit 300 is by 6 switching tube Q11~Q16 structures It is connected into, switching tube Q11 source electrode with switching tube Q14 drain electrode and draws to form first of the three-phase full-bridge inverting circuit End is exchanged, this first exchange end is connected to wherein first LC filter circuit, switching tube Q12 source electrode and switching tube Q15's Drain electrode is connected and draws the second exchange end to form the three-phase full-bridge inverting circuit, and this second exchange end is connected to wherein Second LC filter circuit, the drain electrode of switching tube Q13 source electrode and switching tube Q16 are connected and draw that to form the three phase full bridge inverse Become the 3rd exchange end of circuit, the 3rd exchange end is connected to wherein the 3rd LC filter circuit.The grid of switching tube connects Drive circuit is connected to, is opened/is closed by drive circuit driving.Switching tube used in the present invention is preferably NMOS FETs.
In some specific embodiments, the first high frequency half bridge inverter circuit 201 is by electric capacity C4, C5 and switching tube Q5, Q6 are formed；The second high frequency half bridge inverter circuit 202 is made up of electric capacity C7, C8 and switching tube Q7, Q8.
In the exemplary embodiment shown in Fig. 1, electric capacity C5 first end is connected with switching tube Q5 drain electrode and draws shape Into the first DC terminal of the first high frequency half bridge inverter circuit 201, first DC terminal is connected to the high-voltage energy storage filtering Device C positive pole+BUS；Electric capacity C6 first end is connected with switching tube Q6 source electrode and draws that to form first high frequency half bridge inverse Become the second DC terminal of circuit 201, second DC terminal is connected to the negative pole-BUS of the high-voltage energy storage wave filter C；Switching tube Q5 source electrode and switching tube Q6 drain electrode are connected and drawn to form the first of the first high frequency half bridge inverter circuit 201 and exchange End；Electric capacity C5, C6 the second end be connected and draw to be formed the first high frequency half bridge inverter circuit 201 second exchange end；Electricity The first end for holding C7 is connected with switching tube Q7 drain electrode and draws to form the first straight of the second high frequency half bridge inverter circuit 202 End is flowed, first DC terminal is connected to the positive pole+BUS of the high-voltage energy storage wave filter C；Electric capacity C8 first end and switching tube Q8 Source electrode be connected and draw the second DC terminal to form the second high frequency half bridge inverter circuit 202, second DC terminal connection To the negative pole-BUS of the high-voltage energy storage wave filter C；Switching tube Q7 source electrode is connected and drawn with switching tube Q8 drain electrode to be formed First exchange end of the second high frequency half bridge inverter circuit 202；Electric capacity C7, C8 the second end are connected and draw to form described Second exchange end of two high frequency half bridge inverter circuits 202.
In the embodiment shown in Figure 2, electric capacity C5 first end and switching tube Q5 drain electrode are commonly connected to the high pressure Energy storage filter C positive pole+BUS；Electric capacity C6 first end is connected with switching tube Q6 source electrode, and is commonly connected to electric capacity C7's The common end that first end is connected with switching tube Q7 drain electrode；Switching tube Q5 source electrode is connected with switching tube Q6 drain electrode and draws shape First into the first high frequency half bridge inverter circuit 201 exchanges end；Electric capacity C5, C6 the second end are connected and drawn described in formation Second exchange end of the first high frequency half bridge inverter circuit 201；Electric capacity C8 first end and switching tube Q8 source electrode are commonly connected to Negative pole-the BUS of the high-voltage energy storage wave filter；Switching tube Q7 source electrode is connected and drawn described in formation with switching tube Q8 drain electrode First exchange end of the second high frequency half bridge inverter circuit 202；Electric capacity C7, C8 the second end are connected and draw that to form described second high Second exchange end of frequency half-bridge inversion circuit 202.
In embodiment as depicted in figs. 1 and 2, first, second rectification circuit 301 and 302 is all by two switching tube structures Into Half bridge rectifier circuit or the full bridge rectifier that is made up of four switching tubes.Exemplified by shown in Fig. 1 and Fig. 2, First rectification circuit 301 is made up of two switching tubes Q1 and Q2, and the second rectification circuit 302 is made up of two switching tubes Q3 and Q4, Q1 and Q2 drain electrode is respectively two DC terminals of the first rectification circuit 301, and is connected to the first high-frequency isolation transformer T1 first end 11, the 3rd end 13；Q1 and Q2 source electrode is commonly connected to DC source V2 negative pole.Q3 and Q4 drain electrode is respectively Two DC terminals of the second rectification circuit 302, and it is connected to the second high-frequency isolation transformer T2 first end 21, the 3rd end 32；Q3 and Q4 source electrode is commonly connected to DC source V2 negative pole.The second of first and second high-frequency isolation transformer T1 and T2 End 12,22.
The embodiment of the present invention also proposed high-frequency isolation ac-dc conversion circuit as depicted in figs. 1 and 2 Control method, for the real-time voltage value according to DC source V2 come mode of operation (rectification mode or the inversion mould of switching circuit Formula).The control method includes：
When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC rectification states are simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；It is if described DC source receives electric current more than or equal to 0.1 times of rated current, then：First and second rectification is driven with pwm signal All switching tubes of circuit are open-minded；Wherein, the on/off sequential of the switching tube of first rectification circuit is high with described first Enter line displacement based on the center of the on/off sequential of frequency half-bridge inversion circuit, the switching tube of second rectification circuit On/off sequential enters line displacement based on the center of the on/off sequential of the second high frequency half bridge inverter circuit, and And dutycycle size is opened to improve efficiency according to switching frequency adjustment；
When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, described in control First high frequency half bridge inverter circuit based on the center of the on/off sequential of first rectification circuit open/close It is disconnected, and control the second high frequency half bridge inverter circuit using the center of the on/off sequential of second rectification circuit as Basis carry out on/off, and according to the voltage levels of the DC source enter line displacement and adjustment open dutycycle size with Improve efficiency；
Wherein, during the on/off of the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit Sequence is the same as 90 ° of phase or misphase.As shown in Figure 3 and Figure 4, Fig. 3 is same phase to the control sequential of switching tube under rectification mode, and Fig. 4 is 90 ° of misphase；As shown in Figure 5 and Figure 6, Fig. 5 is same phase to switch controlled sequential under inverter mode, and Fig. 6 is 90 ° of misphase.
As shown in figure 3, under the rectification mode, the first high frequency half bridge inverter circuit and second high frequency half bridge When the on/off sequential of inverter circuit is with phase：The same phase of on/off sequential of 5th and the 7th switching tube, the 6th and the 8th The same phase of on/off sequential of switching tube；First and the 3rd switching tube the same phase of on/off sequential, and with the 5th and Enter line displacement based on the center of the on/off sequential of seven switching tubes；Second and the 4th switching tube on/off sequential it is same Phase, and enter line displacement based on the center of the on/off sequential of the 6th and the 8th switching tube.
As shown in figure 4, under the rectification mode, the first high frequency half bridge inverter circuit and second high frequency half bridge During 90 ° of the on/off sequential misphase of inverter circuit：90 ° of the on/off sequential misphase of 5th and the 7th switching tube, the 6th With 90 ° of the on/off sequential misphase of the 8th switching tube；First and the 3rd switching tube 90 ° of on/off sequential misphase, and And the on/off sequential of first switch pipe enters line displacement based on the center of the on/off sequential of the 5th switching tube, The on/off sequential of 3rd switching tube enters line displacement based on the center of the on/off sequential of the 7th switching tube；Second With 90 ° of the on/off sequential misphase of the 4th switching tube, also, the on/off sequential of second switch pipe is with the 6th switching tube On/off sequential center based on enter line displacement, on/off sequential the opening with the 8th switching tube of the 4th switching tube Enter line displacement based on the center of logical/shut-off sequential.
As shown in figure 5, under the inverter mode, the first high frequency half bridge inverter circuit and second high frequency half bridge When the on/off sequential of inverter circuit is with phase：First and the 3rd switching tube the same phase of on/off sequential, second and the 4th The same phase of on/off sequential of switching tube；The same phase of on/off sequential of 5th and the 7th switching tube, and with first and Enter line displacement based on the center of the on/off sequential of three switching tubes；The on/off sequential of 6th and the 8th switching tube is same Phase, and by second and the 4th switching tube on/off sequential center based on enter line displacement.
Under the inverter mode, the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit During 90 ° of on/off sequential misphase：First and the 3rd switching tube 90 ° of on/off sequential misphase, second and the 4th switch 90 ° of the on/off sequential misphase of pipe；90 ° of the on/off sequential misphase of 5th and the 7th switching tube, also, the 5th switch The on/off sequential of pipe enters line displacement based on the center of the on/off sequential of first switch pipe, the 7th switching tube On/off sequential enters line displacement based on the center of the on/off sequential of the 3rd switching tube；6th and the 8th switching tube 90 ° of on/off sequential misphase, also, the on/off sequential of the 6th switching tube is with the on/off of second switch pipe Enter line displacement based on the center of sequential, the on/off sequential of the 8th switching tube is with the on/off sequential of the 4th switching tube Center based on enter line displacement.
The present invention is another to additionally provide a kind of high-frequency isolation ac-dc conversion circuit, with reference to the change shown in figure 7 and Fig. 8, Fig. 7 The difference for changing circuit and the translation circuit shown in Fig. 1 is, the first rectification circuit 301 in Fig. 1 is used into voltage doubling rectifing circuit 301 ' are substituted, and the second rectification circuit 302 in Fig. 1 is substituted with voltage doubling rectifing circuit 302 '.Fig. 8 and Fig. 7 difference exists In first, second high frequency half bridge inverter circuit 201,202 in Fig. 7 is in parallel with high-voltage energy storage wave filter C respectively；And Fig. 8 In, the first high frequency half bridge inverter circuit 201 is series at the second high frequency half bridge inverter circuit 202, common in parallel paramount again after series connection Press energy storage filter C.Specifically, as shown in fig. 7, voltage doubling rectifing circuit 301 ' is by switching tube Q1, Q2 and electric capacity C1, C2 structure Into；Switching tube Q1 source electrode is commonly connected to the first high-frequency isolation transformer T1 the second end 12 with switching tube Q2 drain electrode, opens Close the positive pole that pipe Q1 drain electrode is commonly connected to the DC source V2 with electric capacity C1 first end, switching tube Q2 source electrode and electric capacity C2 first end is commonly connected to the negative pole of the DC source V2, and electric capacity C1 the second end and electric capacity C2 the second end connect jointly To the first high-frequency isolation transformer T1 first end 11.The composition of voltage doubling rectifing circuit 302 ' and the structure of voltage doubling rectifing circuit 301 ' Into identical.
A kind of circuit control method that another embodiment provides, handed over for the high-frequency isolation of control example as shown in Figure 7 and Figure 8 DC transfer circuit switch operating between rectification mode and inverter mode, the circuit control method include：
When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC rectification states are simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；It is if described DC source receives electric current more than or equal to 0.1 times of rated current, then：First and second multiplication of voltage is driven with pwm signal All switching tubes of rectification circuit are open-minded；Wherein, the on/off sequential of the switching tube of first voltage doubling rectifing circuit is with institute State and enter line displacement based on the center of the on/off sequential of the first high frequency half bridge inverter circuit, the second voltage multiplying rectifier electricity The on/off sequential of the switching tube on road is using the center of the on/off sequential of the second high frequency half bridge inverter circuit as base Plinth enters line displacement, and opens dutycycle size according to switching frequency adjustment to improve efficiency.
When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, described in control First high frequency half bridge inverter circuit is opened based on the center of the on/off sequential of first voltage doubling rectifing circuit Logical/shut-off, and control the second high frequency half bridge inverter circuit is with the on/off sequential of second voltage doubling rectifing circuit Center based on carry out on/off, and enter line displacement according to the voltage levels of the DC source and duty is opened in adjustment Than size to improve efficiency.
The control method of translation circuit exemplified by Fig. 7 and Fig. 8 and the controlling party of the translation circuit exemplified by Fig. 1 and Fig. 2 Method is identical for the control sequential of switching tube, i.e., as shown in Fig. 3 to 6.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert The specific implementation of the present invention is confined to these explanations.For those skilled in the art, do not taking off On the premise of from present inventive concept, some equivalent substitutes or obvious modification can also be made, and performance or purposes are identical, all should When being considered as belonging to protection scope of the present invention.

Claims (8)

  1. A kind of 1. circuit control method, it is characterised in that：For controlling a high-frequency isolation ac-dc conversion circuit in rectification mode The switch operating between inverter mode；
    The translation circuit is by a three-phase alternating current source, a DC source, the filter circuit being filtered to the three-phase alternating current source, simultaneously It is inverse to be coupled to the filter capacitor of the DC source, high-voltage energy storage wave filter, three-phase full-bridge inverting circuit, the first to the second high frequency half bridge Become circuit, the first to the second inductance, the first to the second high-frequency isolation transformer, the first to the second rectification circuit, for drive open The control circuit closed the drive circuit of pipe and be connected with the drive circuit is formed；Wherein, first and second high frequency every Positioned at the first to the 3rd end of the DC source side and positioned at three-phase alternating current source side is respectively provided with from transformer Four and the 5th end；
    The filter circuit is connected to the exchanging between end of the three-phase alternating current source and the three-phase full-bridge inverting circuit；Described three Phase full bridge inverter is connected in parallel to the high-voltage energy storage wave filter by two DC terminal；
    The first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit pass through respective two direct currents respectively End is connected in parallel to the high-voltage energy storage wave filter；Or the first high frequency half bridge inverter circuit and second high frequency half bridge it is inverse Become circuit connected in series, and two by being formed after series connection DC terminals are connected in parallel to the high-voltage energy storage wave filter；
    The first high frequency half bridge inverter circuit first exchange end by first inductance connection to first high frequency every From the 4th end of transformer, and, the second exchange end is connected to the 5th end of first high-frequency isolation transformer；
    The second high frequency half bridge inverter circuit first exchange end by second inductance connection to second high frequency every From the 4th end of transformer, and, the second exchange end is connected to the 5th end of second high-frequency isolation transformer；
    First and second rectification circuit is the half-bridge or full bridge rectifier being made up of switching tube, and is respectively provided with two Exchange end and two DC terminals；Two exchange ends of first rectification circuit are respectively connecting to the first high-frequency isolation transformation The first end of device and the 3rd end, and, two DC terminals are commonly connected to the negative pole of the DC source；Second rectification circuit Two exchange ends be respectively connecting to first end and the 3rd end of second high-frequency isolation transformer, and, two DC terminals It is commonly connected to the negative pole of the DC source；
    Second end of first and second high-frequency isolation transformer is connected to the positive pole of the DC source；
    The control method includes：
    When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC Rectification state is simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；If the direct current Electric current is received more than or equal to 0.1 times of rated current in source, then：First and second rectification circuit is driven with pwm signal All switching tubes it is open-minded；Wherein, the on/off sequential of the switching tube of first rectification circuit is with first high frequency half Enter line displacement based on the center of the on/off sequential of bridge inverter circuit, the opening of the switching tube of second rectification circuit/ Shut-off sequential enters line displacement, and root based on the center of the on/off sequential of the second high frequency half bridge inverter circuit Dutycycle size is opened to improve efficiency according to switching frequency adjustment；
    When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, control described first High frequency half bridge inverter circuit carries out on/off based on the center of the on/off sequential of first rectification circuit, with And enter based on the center of on/off sequential of control the second high frequency half bridge inverter circuit by second rectification circuit Row on/off, and enter line displacement and adjust to open dutycycle size to improve effect according to the voltage levels of the DC source Rate；
    Wherein, the on/off sequential of the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit is same 90 ° of phase or misphase.
  2. 2. control method as claimed in claim 1, it is characterised in that：The first high frequency half bridge inverter circuit (201) is by 5th, the 6th electric capacity (C4, C5) and the five, the 6th switching tubes (Q5, Q6) are formed；The second high frequency half bridge inverter circuit (202) it is made up of the seven, the 8th electric capacity (C7, C8) and the seven, the 8th switching tubes (Q7, Q8)；
    When the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit are straight by respective two respectively When stream end is connected in parallel to the high-voltage energy storage wave filter：
    The first end of 5th electric capacity (C5) is connected and drawn to form first high frequency with the drain electrode of the 5th switching tube (Q5) First DC terminal of half-bridge inversion circuit (201), first DC terminal be connected to the high-voltage energy storage wave filter positive pole (+ BUS)；The first end of 6th electric capacity (C6) is connected and drawn to form first high frequency half bridge with the source electrode of the 6th switching tube (Q6) Second DC terminal of inverter circuit (201), second DC terminal are connected to the negative pole (- BUS) of the high-voltage energy storage wave filter；The The source electrode of five switching tubes (Q5) is connected with the drain electrode of the 6th switching tube (Q6) and draws to form the first high frequency half bridge inversion electricity The first exchange end on road (201)；Second end of the five, the 6th electric capacity (C5, C6) is connected and draws to form first high frequency half Second exchange end of bridge inverter circuit (201)；
    The first end of 7th electric capacity (C7) is connected and drawn to form second high frequency with the drain electrode of the 7th switching tube (Q7) First DC terminal of half-bridge inversion circuit (202), first DC terminal be connected to the high-voltage energy storage wave filter positive pole (+ BUS)；The first end of 8th electric capacity is connected and drawn to form the second high frequency half bridge inversion with the source electrode of the 8th switching tube (Q8) Second DC terminal of circuit (202), second DC terminal are connected to the negative pole (- BUS) of the high-voltage energy storage wave filter；7th opens The source electrode for closing pipe (Q7) is connected and drawn to form the second high frequency half bridge inverter circuit with the drain electrode of the 8th switching tube (Q8) (202) the first exchange end；Second end of the seven, the 8th electric capacity (C7, C8) is connected and draws to form second high frequency half bridge Second exchange end of inverter circuit (202)；
    First rectification circuit is the Half bridge rectifier circuit being made up of the first and second switching tubes (Q1, Q2), and described second is whole Current circuit is the Half bridge rectifier circuit being made up of the third and fourth switching tube (Q3, Q4)；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：The same phase of on/off sequential of 5th and the 7th switching tube, the opening of the 6th and the 8th switching tube/ Turn off the same phase of sequential；First and the 3rd switching tube the same phase of on/off sequential, and opening with the 5th and the 7th switching tube Enter line displacement based on the center of logical/shut-off sequential；Second and the 4th switching tube the same phase of on/off sequential, and with Enter line displacement based on the center of the on/off sequential of six and the 8th switching tube；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：90 ° of the on/off sequential misphase of 5th and the 7th switching tube, the 6th and the 8th switching tube 90 ° of on/off sequential misphase；First and the 3rd switching tube 90 ° of on/off sequential misphase, also, first switch pipe On/off sequential enter line displacement based on the center of the on/off sequential of the 5th switching tube, the 3rd switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 7th switching tube；Second and the 4th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of second switch pipe is with the on/off of the 6th switching tube Enter line displacement based on the center of sequence, the on/off sequential of the 4th switching tube is with the on/off sequential of the 8th switching tube Enter line displacement based on center；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：First and the 3rd switching tube the same phase of on/off sequential, second and the 4th the opening of switching tube/ Turn off the same phase of sequential；The same phase of on/off sequential of 5th and the 7th switching tube, and with first and the 3rd switching tube open Enter line displacement based on the center of logical/shut-off sequential；The same phase of on/off sequential of 6th and the 8th switching tube, and with Enter line displacement based on the center of the on/off sequential of two and the 4th switching tube；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：First and the 3rd switching tube 90 ° of on/off sequential misphase, second and the 4th switching tube 90 ° of on/off sequential misphase；90 ° of the on/off sequential misphase of 5th and the 7th switching tube, also, the 5th switching tube On/off sequential enter line displacement based on the center of the on/off sequential of first switch pipe, the 7th switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 3rd switching tube；6th and the 8th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of the 6th switching tube is with the on/off of second switch pipe Enter line displacement based on the center of sequence, the on/off sequential of the 8th switching tube is with the on/off sequential of the 4th switching tube Enter line displacement based on center.
  3. 3. control method as claimed in claim 1, it is characterised in that：The first high frequency half bridge inverter circuit (201) is by 5th, the 6th electric capacity (C4, C5) and the five, the 6th switching tubes (Q5, Q6) are formed；The second high frequency half bridge inverter circuit (202) it is made up of the seven, the 8th electric capacity (C7, C8) and the seven, the 8th switching tubes (Q7, Q8)；
    When the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit series connection, and pass through series connection When two DC terminals formed afterwards are connected in parallel to the high-voltage energy storage wave filter：
    The first end of 5th electric capacity (C5) is commonly connected to the high-voltage energy storage with the drain electrode of the 5th switching tube (Q5) and filtered The positive pole (+BUS) of device；The first end of 6th electric capacity (C6) is connected with the source electrode of the 6th switching tube (Q6), and is commonly connected to The common end that the first end of seven electric capacity (C7) is connected with the drain electrode of the 7th switching tube (Q7)；The source electrode of 5th switching tube (Q5) and The drain electrode of six switching tubes (Q6) be connected and draw to be formed the first high frequency half bridge inverter circuit (201) first exchange end；The 5th, the second end of the 6th electric capacity (C5, C6) be connected and draw to be formed the first high frequency half bridge inverter circuit (201) second hand over Flow end；
    The first end of 8th electric capacity (C8) is commonly connected to the high-voltage energy storage wave filter with the source electrode of the 8th switching tube (Q8) Negative pole (- BUS)；The source electrode of 7th switching tube (Q7) is connected with the drain electrode of the 8th switching tube (Q8) and draws that to form described second high First exchange end of frequency half-bridge inversion circuit (202)；Second end of the seven, the 8th electric capacity (C7, C8) is connected and draws to form institute State the second exchange end of the second high frequency half bridge inverter circuit (202)；
    First rectification circuit is the Half bridge rectifier circuit being made up of the first and second switching tubes (Q1, Q2), and described second is whole Current circuit is the Half bridge rectifier circuit being made up of the third and fourth switching tube (Q3, Q4)；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：The same phase of on/off sequential of 5th and the 7th switching tube, the opening of the 6th and the 8th switching tube/ Turn off the same phase of sequential；First and the 3rd switching tube the same phase of on/off sequential, and opening with the 5th and the 7th switching tube Enter line displacement based on the center of logical/shut-off sequential；Second and the 4th switching tube the same phase of on/off sequential, and with Enter line displacement based on the center of the on/off sequential of six and the 8th switching tube；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：90 ° of the on/off sequential misphase of 5th and the 7th switching tube, the 6th and the 8th switching tube 90 ° of on/off sequential misphase；First and the 3rd switching tube 90 ° of on/off sequential misphase, also, first switch pipe On/off sequential enter line displacement based on the center of the on/off sequential of the 5th switching tube, the 3rd switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 7th switching tube；Second and the 4th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of second switch pipe is with the on/off of the 6th switching tube Enter line displacement based on the center of sequence, the on/off sequential of the 4th switching tube is with the on/off sequential of the 8th switching tube Enter line displacement based on center；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：First and the 3rd switching tube the same phase of on/off sequential, second and the 4th the opening of switching tube/ Turn off the same phase of sequential；The same phase of on/off sequential of 5th and the 7th switching tube, and with first and the 3rd switching tube open Enter line displacement based on the center of logical/shut-off sequential；The same phase of on/off sequential of 6th and the 8th switching tube, and with Enter line displacement based on the center of the on/off sequential of two and the 4th switching tube；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：First and the 3rd switching tube 90 ° of on/off sequential misphase, second and the 4th switching tube 90 ° of on/off sequential misphase；90 ° of the on/off sequential misphase of 5th and the 7th switching tube, also, the 5th switching tube On/off sequential enter line displacement based on the center of the on/off sequential of first switch pipe, the 7th switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 3rd switching tube；6th and the 8th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of the 6th switching tube is with the on/off of second switch pipe Enter line displacement based on the center of sequence, the on/off sequential of the 8th switching tube is with the on/off sequential of the 4th switching tube Enter line displacement based on center.
  4. 4. circuit control method as claimed in claim 1, it is characterised in that：The conversion is judged by the control circuit The current desired mode of operation of circuit.
  5. A kind of 5. circuit control method, it is characterised in that：For controlling a high-frequency isolation ac-dc conversion circuit in rectification mode The switch operating between inverter mode；
    The translation circuit is by a three-phase alternating current source, a DC source, the filter circuit being filtered to the three-phase alternating current source, simultaneously It is inverse to be coupled to the filter capacitor of the DC source, high-voltage energy storage wave filter, three-phase full-bridge inverting circuit, the first to the second high frequency half bridge Become circuit, the first to the second inductance, the first to the second high-frequency isolation transformer, the first to the second voltage doubling rectifing circuit, for driving The drive circuit of dynamic switching tube and the control circuit being connected with the drive circuit are formed；Wherein, described first and second is high Frequency isolating transformer is respectively provided with positioned at first, second end of the DC source side and positioned at three-phase alternating current source side Three, the 4th ends；
    The filter circuit is connected to the exchanging between end of the three-phase alternating current source and the three-phase full-bridge inverting circuit；Described three Phase full bridge inverter is connected in parallel to the high-voltage energy storage wave filter by two DC terminal；
    The first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit pass through respective two direct currents respectively End is connected in parallel to the high-voltage energy storage wave filter；Or the first high frequency half bridge inverter circuit and second high frequency half Bridge inverter circuit is connected, and two by being formed after series connection DC terminals are connected in parallel to the high-voltage energy storage wave filter；
    The first high frequency half bridge inverter circuit first exchange end by first inductance connection to first high frequency every From the 3rd end of transformer, and, the second exchange end is connected to the 4th end of first high-frequency isolation transformer；
    The second high frequency half bridge inverter circuit first exchange end by second inductance connection to second high frequency every From the 3rd end of transformer, and, the second exchange end is connected to the 4th end of second high-frequency isolation transformer；
    First and second rectification circuit is made up of two switching tubes and two electric capacity, and is respectively provided with two exchange ends With two DC terminals；Two exchange ends of first voltage doubling rectifing circuit are respectively connecting to first high-frequency isolation transformer First end and the second end, and, two DC terminals are connected to the positive pole and negative pole of the DC source；Second multiplication of voltage Two exchange ends of rectification circuit are respectively connecting to first end and the second end of second high-frequency isolation transformer, and, two Individual DC terminal is connected to the positive pole and negative pole of the DC source；
    The control method includes：
    When judging that the translation circuit need to work in rectification mode：The three-phase full-bridge inverting circuit is controlled to work in PFC Rectification state is simultaneously boosted；The first, second high frequency half bridge inverter circuit is controlled to work in inverter mode；If the direct current Electric current is received more than or equal to 0.1 times of rated current in source, then：First and second voltage multiplying rectifier is driven with pwm signal All switching tubes of circuit are open-minded；Wherein, the on/off sequential of the switching tube of first voltage doubling rectifing circuit is with described Enter line displacement based on the center of the on/off sequential of one high frequency half bridge inverter circuit, second voltage doubling rectifing circuit The on/off sequential of switching tube is entered based on the center of the on/off sequential of the second high frequency half bridge inverter circuit Line displacement, and dutycycle size is opened to improve efficiency according to switching frequency adjustment；
    When judging that the translation circuit need to work in inverter mode：According to the voltage of the DC source, control described first High frequency half bridge inverter circuit based on the center of the on/off sequential of first voltage doubling rectifing circuit open/close It is disconnected, and control the second high frequency half bridge inverter circuit is with the on/off sequential of second voltage doubling rectifing circuit Carry out on/off based on the heart, and according to the voltage levels of the DC source enter line displacement and adjustment to open dutycycle big It is small to improve efficiency；
    Wherein, the on/off sequential of the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit is same 90 ° of phase or misphase.
  6. 6. control method as claimed in claim 5, it is characterised in that：The first high frequency half bridge inverter circuit (201) is by 5th, the 6th electric capacity (C4, C5) and the five, the 6th switching tubes (Q5, Q6) are formed；The second high frequency half bridge inverter circuit (202) it is made up of the seven, the 8th 6 electric capacity (C7, C8) and the seven, the 8th switching tubes (Q7, Q8)；
    When the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit are straight by respective two respectively When stream end is connected in parallel to the high-voltage energy storage wave filter：
    The first end of 5th electric capacity (C5) is connected and drawn to form first high frequency with the drain electrode of the 5th switching tube (Q5) First DC terminal of half-bridge inversion circuit (201), first DC terminal be connected to the high-voltage energy storage wave filter positive pole (+ BUS)；The first end of 6th electric capacity (C6) is connected and drawn to form first high frequency half bridge with the source electrode of the 6th switching tube (Q6) Second DC terminal of inverter circuit (201), second DC terminal are connected to the negative pole (- BUS) of the high-voltage energy storage wave filter；The The source electrode of five switching tubes (Q5) is connected with the drain electrode of the 6th switching tube (Q6) and draws to form the first high frequency half bridge inversion electricity The first exchange end on road (201)；Second end of the five, the 6th electric capacity (C5, C6) is connected and draws to form first high frequency half Second exchange end of bridge inverter circuit (201)；
    The first end of 7th electric capacity (C7) is connected and drawn to form second high frequency with the drain electrode of the 7th switching tube (Q7) First DC terminal of half-bridge inversion circuit (202), first DC terminal be connected to the high-voltage energy storage wave filter positive pole (+ BUS)；The first end of 8th electric capacity is connected and drawn to form the second high frequency half bridge inversion with the source electrode of the 8th switching tube (Q8) Second DC terminal of circuit (202), second DC terminal are connected to the negative pole (- BUS) of the high-voltage energy storage wave filter；7th opens The source electrode for closing pipe (Q7) is connected and drawn to form the second high frequency half bridge inverter circuit with the drain electrode of the 8th switching tube (Q8) (202) the first exchange end；Second end of the seven, the 8th electric capacity (C7, C8) is connected and draws to form second high frequency half bridge Second exchange end of inverter circuit (202)；
    First voltage doubling rectifing circuit is made up of first, second switching tube (Q1, Q2) and first, second electric capacity (C1, C2)； The source electrode of first switch pipe (Q1) is commonly connected to the first high-frequency isolation transformer (T1) with the drain electrode of second switch pipe (Q2) Second end (12), the drain electrode of first switch pipe (Q1) are commonly connected to the DC source (V2) with the first end of the first electric capacity (C1) Positive pole, the source electrode of second switch pipe (Q2) and the first end of the second electric capacity (C2) are commonly connected to the negative of the DC source (V2) Pole, the second end of the first electric capacity and the second end of the second electric capacity are commonly connected to the first high-frequency isolation transformer (T1) first end (11)；
    Second voltage doubling rectifing circuit is made up of the three, the 4th switching tubes (Q3, Q4) and the three, the 4th electric capacity (C3, C4)； The drain electrode of the source electrode and the 4th switching tube (Q4) of 3rd switching tube (Q3) is commonly connected to the second high-frequency isolation transformer (T2) Second end (22), the drain electrode of the 3rd switching tube (Q3) are commonly connected to the DC source (V2) with the first end of the 3rd electric capacity (C3) Positive pole, the source electrode of the 4th switching tube (Q4) and the first end of the 4th electric capacity (C4) are commonly connected to the negative of the DC source (V2) Pole, the second end of the 3rd electric capacity and the second end of the 4th electric capacity are commonly connected to the second high-frequency isolation transformer (T2) first end (21)；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：The same phase of on/off sequential of 5th and the 7th switching tube, the opening of the 6th and the 8th switching tube/ Turn off the same phase of sequential；First and the 3rd switching tube the same phase of on/off sequential, and opening with the 5th and the 7th switching tube Enter line displacement based on the center of logical/shut-off sequential；Second and the 4th switching tube the same phase of on/off sequential, and with Enter line displacement based on the center of the on/off sequential of six and the 8th switching tube；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：90 ° of the on/off sequential misphase of 5th and the 7th switching tube, the 6th and the 8th switching tube 90 ° of on/off sequential misphase；First and the 3rd switching tube 90 ° of on/off sequential misphase, also, first switch pipe On/off sequential enter line displacement based on the center of the on/off sequential of the 5th switching tube, the 3rd switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 7th switching tube；Second and the 4th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of second switch pipe is with the on/off of the 6th switching tube Enter line displacement based on the center of sequence, the on/off sequential of the 4th switching tube is with the on/off sequential of the 8th switching tube Enter line displacement based on center；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：First and the 3rd switching tube the same phase of on/off sequential, second and the 4th the opening of switching tube/ Turn off the same phase of sequential；The same phase of on/off sequential of 5th and the 7th switching tube, and with first and the 3rd switching tube open Enter line displacement based on the center of logical/shut-off sequential；The same phase of on/off sequential of 6th and the 8th switching tube, and with Enter line displacement based on the center of the on/off sequential of two and the 4th switching tube；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：First and the 3rd switching tube 90 ° of on/off sequential misphase, second and the 4th switching tube 90 ° of on/off sequential misphase；90 ° of the on/off sequential misphase of 5th and the 7th switching tube, also, the 5th switching tube On/off sequential enter line displacement based on the center of the on/off sequential of first switch pipe, the 7th switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 3rd switching tube；6th and the 8th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of the 6th switching tube is with the on/off of second switch pipe Enter line displacement based on the center of sequence, the on/off sequential of the 8th switching tube is with the on/off sequential of the 4th switching tube Enter line displacement based on center.
  7. 7. control method as claimed in claim 5, it is characterised in that：The first high frequency half bridge inverter circuit (201) is by 5th, the 6th electric capacity (C4, C5) and the five, the 6th switching tubes (Q5, Q6) are formed；The second high frequency half bridge inverter circuit (202) it is made up of the seven, the 8th 6 electric capacity (C7, C8) and the seven, the 8th switching tubes (Q7, Q8)；
    When the first high frequency half bridge inverter circuit and the second high frequency half bridge inverter circuit series connection, and pass through series connection When two DC terminals formed afterwards are connected in parallel to the high-voltage energy storage wave filter：
    The first end of 5th electric capacity (C5) is commonly connected to the high-voltage energy storage with the drain electrode of the 5th switching tube (Q5) and filtered The positive pole (+BUS) of device；The first end of 6th electric capacity (C6) is connected with the source electrode of the 6th switching tube (Q6), and is commonly connected to The common end that the first end of seven electric capacity (C7) is connected with the drain electrode of the 7th switching tube (Q7)；The source electrode of 5th switching tube (Q5) and The drain electrode of six switching tubes (Q6) be connected and draw to be formed the first high frequency half bridge inverter circuit (201) first exchange end；The 5th, the second end of the 6th electric capacity (C5, C6) be connected and draw to be formed the first high frequency half bridge inverter circuit (201) second hand over Flow end；
    The first end of 8th electric capacity (C8) is commonly connected to the high-voltage energy storage wave filter with the source electrode of the 8th switching tube (Q8) Negative pole (- BUS)；The source electrode of 7th switching tube (Q7) is connected with the drain electrode of the 8th switching tube (Q8) and draws that to form described second high First exchange end of frequency half-bridge inversion circuit (202)；Second end of the seven, the 8th electric capacity (C7, C8) is connected and draws to form institute State the second exchange end of the second high frequency half bridge inverter circuit (202)；
    First voltage doubling rectifing circuit is made up of first, second switching tube (Q1, Q2) and first, second electric capacity (C1, C2)； The source electrode of first switch pipe (Q1) is commonly connected to the first high-frequency isolation transformer (T1) with the drain electrode of second switch pipe (Q2) Second end (12), the drain electrode of first switch pipe (Q1) are commonly connected to the DC source (V2) with the first end of the first electric capacity (C1) Positive pole, the source electrode of second switch pipe (Q2) and the first end of the second electric capacity (C2) are commonly connected to the negative of the DC source (V2) Pole, the second end of the first electric capacity and the second end of the second electric capacity are commonly connected to the first high-frequency isolation transformer (T1) first end (11)；
    Second voltage doubling rectifing circuit is made up of the three, the 4th switching tubes (Q3, Q4) and the three, the 4th electric capacity (C3, C4)； The drain electrode of the source electrode and the 4th switching tube (Q4) of 3rd switching tube (Q3) is commonly connected to the second high-frequency isolation transformer (T2) Second end (22), the drain electrode of the 3rd switching tube (Q3) are commonly connected to the DC source (V2) with the first end of the 3rd electric capacity (C3) Positive pole, the source electrode of the 4th switching tube (Q4) and the first end of the 4th electric capacity (C4) are commonly connected to the negative of the DC source (V2) Pole, the second end of the 3rd electric capacity and the second end of the 4th electric capacity are commonly connected to the second high-frequency isolation transformer (T2) first end (21)；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：The same phase of on/off sequential of 5th and the 7th switching tube, the opening of the 6th and the 8th switching tube/ Turn off the same phase of sequential；First and the 3rd switching tube the same phase of on/off sequential, and opening with the 5th and the 7th switching tube Enter line displacement based on the center of logical/shut-off sequential；Second and the 4th switching tube the same phase of on/off sequential, and with Enter line displacement based on the center of the on/off sequential of six and the 8th switching tube；
    Under the rectification mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：90 ° of the on/off sequential misphase of 5th and the 7th switching tube, the 6th and the 8th switching tube 90 ° of on/off sequential misphase；First and the 3rd switching tube 90 ° of on/off sequential misphase, also, first switch pipe On/off sequential enter line displacement based on the center of the on/off sequential of the 5th switching tube, the 3rd switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 7th switching tube；Second and the 4th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of second switch pipe is with the on/off of the 6th switching tube Enter line displacement based on the center of sequence, the on/off sequential of the 4th switching tube is with the on/off sequential of the 8th switching tube Enter line displacement based on center；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit When logical/shut-off sequential is with phase：First and the 3rd switching tube the same phase of on/off sequential, second and the 4th the opening of switching tube/ Turn off the same phase of sequential；The same phase of on/off sequential of 5th and the 7th switching tube, and with first and the 3rd switching tube open Enter line displacement based on the center of logical/shut-off sequential；The same phase of on/off sequential of 6th and the 8th switching tube, and with Enter line displacement based on the center of the on/off sequential of two and the 4th switching tube；
    Under the inverter mode, the first high frequency half bridge inverter circuit is opened with the second high frequency half bridge inverter circuit During logical/90 ° of shut-off sequential misphase：First and the 3rd switching tube 90 ° of on/off sequential misphase, second and the 4th switching tube 90 ° of on/off sequential misphase；90 ° of the on/off sequential misphase of 5th and the 7th switching tube, also, the 5th switching tube On/off sequential enter line displacement based on the center of the on/off sequential of first switch pipe, the 7th switching tube is opened Logical/shut-off sequential enters line displacement based on the center of the on/off sequential of the 3rd switching tube；6th and the 8th switching tube 90 ° of on/off sequential misphase, also, when the on/off sequential of the 6th switching tube is with the on/off of second switch pipe Enter line displacement based on the center of sequence, the on/off sequential of the 8th switching tube is with the on/off sequential of the 4th switching tube Enter line displacement based on center.
  8. 8. circuit control method as claimed in claim 5, it is characterised in that：The conversion is judged by the control circuit The current desired mode of operation of circuit.
CN201710888673.9A 2017-09-27 2017-09-27 A kind of circuit control method Pending CN107800320A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362535A (en) * 2021-11-30 2022-04-15 漳州科华技术有限责任公司 Direct current conversion circuit and control method thereof

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CN103457471A (en) * 2013-09-13 2013-12-18 华为技术有限公司 Resonant converter
CN104753369A (en) * 2015-03-18 2015-07-01 深圳市保益新能电气有限公司 High-frequency isolating AC/ DC switching circuit and control method thereof
CN204465374U (en) * 2015-03-18 2015-07-08 深圳市保益新能电气有限公司 A kind of high-frequency isolation ac-dc conversion circuit
CN106230268A (en) * 2016-08-31 2016-12-14 中天昱品科技有限公司 A kind of crisscross parallel LLC resonance DC/DC power inverter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103457471A (en) * 2013-09-13 2013-12-18 华为技术有限公司 Resonant converter
CN104753369A (en) * 2015-03-18 2015-07-01 深圳市保益新能电气有限公司 High-frequency isolating AC/ DC switching circuit and control method thereof
CN204465374U (en) * 2015-03-18 2015-07-08 深圳市保益新能电气有限公司 A kind of high-frequency isolation ac-dc conversion circuit
CN106230268A (en) * 2016-08-31 2016-12-14 中天昱品科技有限公司 A kind of crisscross parallel LLC resonance DC/DC power inverter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362535A (en) * 2021-11-30 2022-04-15 漳州科华技术有限责任公司 Direct current conversion circuit and control method thereof
CN114362535B (en) * 2021-11-30 2023-10-27 漳州科华电气技术有限公司 Direct current conversion circuit and control method thereof

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Application publication date: 20180313