CN108988634A - A kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its control method - Google Patents

A kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its control method Download PDF

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Publication number
CN108988634A
CN108988634A CN201811008710.3A CN201811008710A CN108988634A CN 108988634 A CN108988634 A CN 108988634A CN 201811008710 A CN201811008710 A CN 201811008710A CN 108988634 A CN108988634 A CN 108988634A
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CN
China
Prior art keywords
switching tube
switch
bridge arm
inductance
pressure
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Application number
CN201811008710.3A
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Chinese (zh)
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CN108988634B (en
Inventor
张丽
李先允
周喜章
戴宁
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Nanjing Kangni Ring Network Switch Equipment Co Ltd
Nanjing Institute of Technology
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Nanjing Kangni Ring Network Switch Equipment Co Ltd
Nanjing Institute of Technology
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Priority to CN201811008710.3A priority Critical patent/CN108988634B/en
Publication of CN108988634A publication Critical patent/CN108988634A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/14Arrangements for reducing ripples from dc input or output
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582Buck-boost converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0067Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0077Plural converter units whose outputs are connected in series
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H02M3/1586Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved

Abstract

The invention discloses a kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its control methods, and including low-pressure side, bridge arm unit and the high-pressure side being sequentially connected, the low-pressure side is connected with the first power supply;The high-pressure side is connected with second source;According to the voltage relationship between the voltage value of second source and the difference and the first power supply and second source of a reference value, the control of different timing is carried out to the two-way large velocity ratio dcdc converter of three-phase alternating expression, realizes two kinds of operating modes of Boost and Buck.For the two-way large velocity ratio dcdc converter work of three-phase alternating expression of the invention at the direction Boost, input terminal crisscross parallel reduces input current ripple, and output end interleaved series improve boosting no-load voltage ratio;At the direction Buck, input terminal interleaved series, output end crisscross parallel has biggish step-down ratio, while reducing output current ripple the two-way large velocity ratio dcdc converter work of three-phase alternating expression.

Description

A kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its control method
Technical field
The invention belongs to power electronics fields, and in particular to a kind of two-way large velocity ratio dcdc converter of three-phase alternating expression And its control method.
Background technique
DC-DC converter, abbreviation DC-DC converter are that a kind of DC power supply is transformed to other to have difference defeated The power electronic equipment of the DC power supply of characteristic out.It is controlled by the quick on-off to power electronic devices constant DC voltage A series of pulse voltages are cut into, changes the pulse width of this series of pulses series by the variation of control duty ratio, realizes defeated The adjusting of average voltage out obtains target DC voltage.It is widely used in the fields such as solar power generation, uninterruptible power supply.
Energy two-way changing may be implemented in traditional two-way DC converter, is functionally equivalent to a basic Boost and becomes The advantages of parallel operation and a basic Buck converter, structure is simple, at low cost, and no transformation is lost, but there is input current and The disadvantages of output current ripple is big, capacity is small, filter element is big.
Currently, dcdc converter using more and more extensive, have three-phase crisscross parallel bidirectional DC/DC converter three Inductive current crisscross parallel reduces input current ripple, and the dynamic for being conducive to improve the efficiency optimization converter of converter is rung It answers.But three-phase crisscross parallel two-way DC converter does not improve transformation ratio, it is difficult to be suitable for input and output voltage conversion ratio Big occasion.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of two-way large velocity ratio dcdc converter of three-phase alternating expression and its controlling party Method improves transformation ratio, realizes the conversion of direct current for reducing current ripples.
It realizes above-mentioned technical purpose, reaches above-mentioned technical effect, the invention is realized by the following technical scheme:
In a first aspect, the present invention provides a kind of two-way large velocity ratio dcdc converters of three-phase alternating expression, including it is sequentially connected Low-pressure side, bridge arm unit and high-pressure side, the bridge arm unit includes the first bridge arm module sequentially in parallel, the second bridge arm module With third bridge arm module;
First bridge arm module includes the first inductance, first switch tube and second switch;
Second bridge arm module includes the second inductance, third switching tube and the 4th switching tube;
The third bridge arm module includes third inductance, the 5th switching tube, the 6th switching tube and the 7th switching tube;
Wherein, the first end of first inductance, the second inductance and third inductance is all connected to the anode of low-pressure side;It is described The second end of first inductance, the second inductance and third inductance respectively with first switch tube, third switching tube and the 5th switching tube First end is connected;The first switch tube, third switching tube, the first end of the second end of the 5th switching tube and the 7th switching tube are equal It is connected to the negative terminal of low-pressure side;The anode and negative terminal of the low-pressure side are respectively used to be connected with the anode and cathode of the first power supply;
The second end of first inductance, the second inductance and third inductance also respectively with second switch, the 4th switching tube It is connected with the second end of the 6th switching tube;The second switch, the 4th switching tube, the 6th switching tube first end and the 7th open The second end for closing pipe is sequentially connected respectively to high-pressure side, and wherein the first end of second switch is connected on high-tension side anode;Institute The second end for stating the 7th switching tube is connected on high-tension side negative terminal;The on high-tension side anode and negative terminal are respectively used to and the second electricity The anode in source is connected with cathode.
Preferably, the low-pressure side includes low pressure lateral capacitance;The first of first inductance, the second inductance and third inductance End is all connected to the anode of low pressure lateral capacitance;The second end and the 7th of the first switch tube, third switching tube, the 5th switching tube The first end of switching tube is all connected to the negative terminal of low pressure lateral capacitance.
Preferably, the high-pressure side includes the high-pressure side first capacitor being sequentially arranged, the second capacitor of high-pressure side and high-pressure side Third capacitor, the high-pressure side first capacitor are set between second switch and the 4th switching tube;Second capacitor of high-pressure side Between the 4th switching tube and the 6th switching tube;The high-pressure side third capacitor be set to the 6th switching tube and the 7th switching tube it Between.
Preferably, the first switch tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube are equal It is made of coupled in parallel body diode, the 4th switching tube and the 6th switching tube are made of the transistor of two reverse parallel connections.
Preferably, the first switch tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube First end and second end is respectively collector and emitter.
Preferably, the driving signal reverse phase of the first switch tube and second switch;The third switching tube and the 4th The driving signal reverse phase of switching tube;The driving signal reverse phase of 5th switching tube and the 6th switching tube.
Preferably, 120 ° of the driving signal interval of the first switch tube, third switching tube and the 5th switching tube.
Second aspect, the present invention provides a kind of control method of the two-way large velocity ratio dcdc converter of three-phase alternating expression, packets It includes:
Obtain the demand for control that second source carries out charge and discharge to the first power supply;
Sample the voltage of current first power supply and the voltage of second source;
When second source voltage is lower than a reference value, T1-T6 timing control first is successively used in a control period The two-way large velocity ratio dcdc converter of three-phase alternating expression described in aspect, makes its work in Boost mode, and the first power supply is in and puts Power mode;
When second source voltage is higher than a reference value, T1 '-T6 ' timing control the is successively used in a control period The two-way large velocity ratio dcdc converter of three-phase alternating expression described in one side, makes its work in Buck mode, and the first power supply is in Charge mode.
Preferably, the first switch tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube are equal It is made of coupled in parallel body diode, the 4th switching tube and the 6th switching tube are made of the transistor of two reverse parallel connections;
Under control in T1, T3 and T5 timing, the first switch tube, third switching tube and the 5th switching tube are led Logical, rest switch pipe is turned off;
Under control in T2 timing, the first switch tube, the 4th switching tube, the 5th switching tube and the 6th switching tube It is both turned on, rest switch pipe is turned off;
Under control in T4 timing, the first switch tube, third switching tube, the 6th switching tube and the 7th switching tube It is both turned on, rest switch pipe is turned off;
Under control in T6 timing, the second switch, third switching tube, the 4th switching tube and the 5th switching tube It is both turned on, rest switch pipe is turned off.
Preferably, when under the control in T1 ' timing: the second switch, third switching tube, the 4th switching tube and the Five switching tubes are both turned on, and rest switch pipe is turned off;
Under control in T3 ' timing, the first switch tube, the 4th switching tube, the 5th switching tube, the 6th switching tube It is both turned on, rest switch pipe is turned off;
Under control in T5 ' timing, the first switch tube, third switching tube, the 6th switching tube and the 7th switch Pipe is both turned on, and rest switch pipe is turned off;
Under control in T2 ', T4 ' and T6 ' timing, the first switch tube, third switching tube, the 5th switching tube are equal Conducting, rest switch pipe are turned off.
Three-phase alternating expression dcdc converter provided by the present invention and its control method, can be according to the voltage value of second source Two-way changing is carried out with the difference of a reference value, buck transformation is realized, compared with prior art, has the advantages that
(1) when the work of three-phase alternating expression dcdc converter is at the direction Boost, input terminal progress crisscross parallel reduces defeated Enter current ripples, output end carries out interleaved series and improves boosting no-load voltage ratio;When three-phase alternating expression dcdc converter works in Buck When direction, input terminal carries out interleaved series, and output end carries out crisscross parallel, has biggish decompression no-load voltage ratio, while reducing defeated Current ripples out.
(2) under two kinds of operating modes, first switch tube S1, third switching tube S2, the switch of the 5th switching tube S3 and the 6th The maximum voltage stress that pipe S7 (S7 ') is born is the 1/3 of high side voltage, the 7th switching tube S5 and the 4th switching tube S6 (S6 ') The maximum voltage stress of receiving is the 2/3 of high side voltage, and the maximum voltage stress that second switch S4 is born is equal to high-pressure side The voltage stress of voltage, power device is reduced, therefore can select the lesser energy-storage travelling wave tube of capacity, is more suitable for big function Rate occasion is conducive to increasing storage battery service life.
(3) electric current of the inductive energy storage with the conversion for releasing energy two states and in each switching tube is in two pole IGBT and body It is converted in pipe, so that loop of power circuit is inconsistent, is conducive to power tube dispersion heat dissipation, reduces cooling requirements, improve system application Reliability.
(4) it can be realized energy in bidirectional flow, be conducive to system control and stablize;The symmetrical control of driving, control program are simple.
Detailed description of the invention
Fig. 1 is the topological diagram of the two-way large velocity ratio dcdc converter of three-phase alternating expression in an embodiment of the present invention;
Fig. 2 is the timing diagram of Boost circuit when second source voltage is lower than a reference value in an embodiment of the present invention;
Fig. 3 is the timing diagram of Buck circuit when second source voltage is higher than a reference value in an embodiment of the present invention;
Fig. 4 is T1, T3, T5 timing current flow diagrams in Fig. 2;
Fig. 5 is T2 timing current flow diagrams in Fig. 2;
Fig. 6 is T4 timing current flow diagrams in Fig. 2;
Fig. 7 is T6 timing current flow diagrams in Fig. 2;
Fig. 8 is T1 ' timing current flow diagrams in Fig. 3;
Fig. 9 is T3 ' timing current flow diagrams in Fig. 3;
Figure 10 is T5 ' timing current flow diagrams in Fig. 3;
Figure 11 is T2 ', T4 ', T6 ' timing current direction in Fig. 3.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Embodiment 1
The embodiment of the invention provides a kind of two-way large velocity ratio dcdc converter of three-phase alternating expression, Fig. 1 is that the present invention is implemented A kind of topological diagram for the two-way large velocity ratio dcdc converter of three-phase alternating expression that example provides.As shown in Figure 1, the three-phase alternating expression is two-way Large velocity ratio dcdc converter include: low pressure lateral capacitance CL, bridge arm unit (respectively the first bridge arm module, the second bridge arm module and Third bridge arm module) and connect with the first bridge arm module, the second bridge arm module and third bridge arm module high pressure lateral capacitance (respectively It is denoted as high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3).First electricity of high-pressure side The parameter for holding CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 is all the same.
First bridge arm module includes the first inductance L1, first switch tube S1, second switch S4;Second bridge arm module Including the second inductance L2, third switching tube S2, the 4th switching tube (by S6 and S6 ' reverse parallel connection form), third bridge arm module packet Include third inductance L3, the 5th switching tube S3, the 6th switching tube (by S7 and S7 ' reverse parallel connection form) and the 7th switching tube S5;Its In, the inductance parameters on each bridge arm module are all the same.
In a kind of specific embodiment of the embodiment of the present invention, specific connection relationship is as follows:
1) the specific connection relationship of first bridge arm module are as follows: the current collection of the first switch tube S1 in the first bridge arm module Pole is connected with the emitter of the second switch S4 of the first bridge arm, and connects the second end of the first inductance L1 of the first bridge arm, the The collector of two switching tube S4 is connect with the first end of high-pressure side first capacitor CH1.It should be noted that high-pressure side first capacitor CH1 is polarized, and the first end of high-pressure side first capacitor CH1 is anode, and the second end of high-pressure side first capacitor CH1 is negative Pole.
2) the specific connection relationship of second bridge arm module are as follows: the collector of the third switching tube S2 of the second bridge arm module It is connected with the collector of the S6 in the 4th switching tube of the second bridge arm module (by S6 and S6 ' reverse parallel connection form), and connects the The second end of second inductance L2 of two bridge arm modules, the emitter of the S6 in the 4th switching tube and the second capacitor of high-pressure side CH2's First end connection.It should be noted that high-pressure side the second capacitor CH2 is polarized, the first end of high-pressure side the second capacitor CH2 For anode, the second end of high-pressure side the second capacitor CH2 is cathode.
3) the specific connection relationship of the third bridge arm module are as follows: the collector of the 5th switching tube S3 of third bridge arm module It is connected with the collector of the S7 in the 6th switching tube of third bridge arm module (by S7 and S7 ' reverse parallel connection form), and connects the The first of the second end of the third inductance L3 of three bridge arms, the emitter of the S7 in the 6th switching tube and high-pressure side third capacitor CH3 End connection.It should be noted that high-pressure side third capacitor CH3 is polarized, the first end of high-pressure side third capacitor CH3 is positive Pole, the second end of high-pressure side third capacitor CH3 are cathode.
The second end high-pressure side corresponding with the second bridge arm module of the corresponding high-pressure side first capacitor CH1 of first bridge arm module The first end of second capacitor CH2 is connected, the second end and third bridge arm of corresponding the second capacitor of the high-pressure side CH2 of the second bridge arm module The first end of the corresponding high-pressure side third capacitor CH3 of module is connected, the corresponding high-pressure side third capacitor CH3's of third bridge arm module Second end is connected with the emitter of the 7th switching tube S5 in third bridge arm module.
The hair of the emitter of first switch tube S1 in first bridge arm module, third switching tube S2 in the second bridge arm module Emitter-base bandgap grading is connected with the emitter of the 5th switching tube S3 in third bridge arm module, as the negative terminal of the first power supply, the first bridge arm mould In the first end of the first inductance L1 in block, the first end of the second inductance L2 in the second bridge arm module and third bridge arm module The first end of third inductance L3 is connected, the anode as the first power supply.
Anode of the first end of the corresponding high-pressure side first capacitor CH1 of first bridge arm module as second source, third bridge Negative terminal of the second end of the corresponding high-pressure side third capacitor CH3 of arm module as second source.
It should be noted that the first power supply in topological structure in Fig. 1 is battery group, second source is that direct current is female Line, but in being embodied, the first power supply and second source can be chosen with concrete condition, be not only limited in field shown in Fig. 1 Scape.
Embodiment 2
Based on the two-way large velocity ratio dcdc converter of three-phase alternating expression in embodiment 1, following two transformation may be implemented:
1, Boost circuit is constructed when second source voltage is lower than a reference value, is realized to the first corona discharge;
2, Buck circuit is constructed when second source voltage is higher than a reference value, is realized to the first power source charges;
The embodiment of the invention provides a kind of control methods of the two-way large velocity ratio dcdc converter of three-phase alternating expression, in order to allow The control method of the more clear DCDC reversible transducer provided by the present invention of those skilled in the art, below in conjunction with switching tube Control sequential and attached drawing, are described further control method.
1, Boost circuit is constructed when second source voltage is lower than a reference value, realizes the control of discharge to the first power supply, control Method processed specifically:
When the electric discharge for needing to control the first power supply, and when second source voltage is lower than a reference value, in a switch periods Successively using the two-way large velocity ratio DCDC transformation of three-phase alternating expression described in T1, T2, T3, T4, T5, T6 timing control as shown in Figure 2 Device, specific as follows:
T1, T3, T5 timing: third switching tube in first switch tube, the second bridge arm module in the first bridge arm module and The 5th switching tube in third bridge arm module is both turned on, and rest switch pipe is turned off.As shown in figure 4, at this point, current direction is, The first end (i.e. the anode of the first power supply) of low pressure lateral capacitance CL passes through the first inductance L1, the first bridge arm in the first bridge arm module First switch tube S1 in module, until the second end (i.e. the negative terminal of the first power supply) of low pressure lateral capacitance CL;Low pressure lateral capacitance CL's First end is by the second inductance L2, the third switching tube S2 in the second bridge arm module in the second bridge arm module, until low-pressure side is electric Hold the second end of CL;The first end of low pressure lateral capacitance CL passes through third inductance L3, the third bridge arm module in third bridge arm module In the 5th switching tube S3, until the second end of low pressure lateral capacitance CL.Define the electric current of the first inductance L1 in the first bridge arm module Direction is electric current " just " flow direction from left to right, and the current direction of the second inductance L2 in the second bridge arm module is electric current from left to right " just " it flows to, the current direction of the third inductance L3 in third bridge arm module is electric current " just " flow direction from left to right, hereinafter It is all made of this definition.Should during, the second inductance L2 in the first inductance L1, the second bridge arm module in the first bridge arm module and The electric current of third inductance L3 in third bridge arm module is " just " flow direction, and electric current is gradually increased, in the first bridge arm module The second inductance L2 in first inductance L1, the second bridge arm module and the equal energy storage of third inductance L3 in third bridge arm module, until Next timing.
High-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 join end to end, electric current by The first end of first capacitor CH1 flows to the anode of second source, and the negative terminal of third capacitor CH3 is flowed back to from the negative terminal of second source, The current direction for defining high-pressure side first capacitor CH1 is electric current " just " flow direction, the electric current of high-pressure side the second capacitor CH2 from the top down Direction is electric current " just " flow direction from the top down, and the current direction of high-pressure side third capacitor CH3 is electric current " just " flow direction from the top down, Hereinafter it is all made of this definition.During being somebody's turn to do, high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third Capacitor CH3 releases energy, and high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 are " negative " stream To, and electric current is gradually reduced, and is charged to second source, until next timing.
T2 timing: the 4th switching tube in first switch tube, the second bridge arm module, third bridge arm in the first bridge arm module The 5th switching tube and the 6th switching tube in module are both turned on, and rest switch pipe is turned off.As shown in figure 5, at this point, current direction It is opened for the first end of, low pressure lateral capacitance CL by first in the first inductance L1 in the first bridge arm module, the first bridge arm module Pipe S1 is closed, until the second end of low pressure lateral capacitance CL;The first end of low pressure lateral capacitance CL passes through the second electricity in the second bridge arm module The 6th in the S6 in the 4th switching tube, high-pressure side the second capacitor CH2, third bridge arm module in sense L2, the second bridge arm module The 5th switching tube S3 in S7 ', third bridge arm module in switching tube, until the second end of low pressure lateral capacitance CL;Low pressure lateral capacitance The first end of CL is by third inductance L3, the 5th switching tube S3 in third bridge arm module in third bridge arm module, until low pressure The second end of lateral capacitance CL.During being somebody's turn to do, the first inductance L1 in the first bridge arm module and the third electricity in third bridge arm module Sense L3 is " just " flow direction, and electric current is gradually increased, in the first inductance L1 and third bridge arm module in the first bridge arm module The equal energy storage of third inductance L3, the electric current of the second inductance L2 in the second bridge arm module is " just " flow direction, but electric current is gradually reduced, The second inductance L2 in second bridge arm module releases energy, charges to high-pressure side the second capacitor CH2, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, and electric current is by first capacitor CH1 First end flow to the anode of second source, the negative terminal of third capacitor CH3 is flowed back to from the negative terminal of second source.During being somebody's turn to do, the One capacitor CH1, the second capacitor CH2 and third capacitor CH3 release energy, and first capacitor CH1, the second capacitor CH2 and third capacitor CH3 are equal It flows to, and electric current is gradually reduced, charges to second source, until next timing to be " negative ".
T4 timing: the third switching tube in first switch tube, the second bridge arm module, third bridge arm in the first bridge arm module The 6th switching tube and the 7th switching tube in module are both turned on, and rest switch pipe is turned off.As shown in fig. 6, at this point, current direction It is opened for the first end of, low pressure lateral capacitance CL by first in the first inductance L1 in the first bridge arm module, the first bridge arm module Pipe S1 is closed, until the second end of low pressure lateral capacitance CL;The first end of low pressure lateral capacitance CL passes through the second electricity in the second bridge arm module Third switching tube S2 in sense L2, the second bridge arm module, until the second end of low pressure lateral capacitance CL;The first end of low pressure lateral capacitance CL Pass through the third inductance L3 in third bridge arm module, the S7 in the 6th switching tube in third bridge arm module, high-pressure side third electricity The body diode D5 for holding CH3, the 7th switching tube S5 in third bridge arm module, until the second end of low pressure lateral capacitance CL.The process In, the first inductance L1 in the first bridge arm module and the second inductance L2 in the second bridge arm module are " just " flow direction, and electric current It is gradually increased, the first inductance L1 in the first bridge arm module and the second equal energy storage of inductance L2 in the second bridge arm module, third bridge The electric current of third inductance L3 in arm module is " just " flow direction, but electric current is gradually reduced, the third inductance in third bridge arm module L3 releases energy, charges to high-pressure side third capacitor CH3, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, and electric current is by first capacitor CH1 First end flow to the anode of second source, the negative terminal of third capacitor CH3 is flowed back to from the negative terminal of second source.During being somebody's turn to do, the One capacitor CH1, the second capacitor CH2 and third capacitor CH3 release energy, and first capacitor CH1, the second capacitor CH2 and third capacitor CH3 are equal It flows to, and electric current is gradually reduced, charges to second source, until next timing to be " negative ".
T6 timing: the second switch in the first bridge arm module, the third in the second bridge arm module, the 4th switching tube and The 5th switching tube in three bridge arm modules is both turned on, and rest switch pipe is turned off.As shown in fig. 7, at this point, current direction is, it is low The first end of lateral capacitance CL is pressed to pass through the first inductance L1, the second switch S4 in the first bridge arm module in the first bridge arm module Body diode D4, high-pressure side first capacitor CH1, the S6 ' in the second bridge arm module in the 4th switching tube, in the second bridge arm module Third switching tube S2, until the second end of low pressure lateral capacitance CL;The first end of low pressure lateral capacitance CL passes through in the second bridge arm module The second inductance L2, the third switching tube S2 in the second bridge arm module, until the second end of low pressure lateral capacitance CL;Low pressure lateral capacitance CL First end by third inductance L3, the 5th switching tube S3 in third bridge arm module in third bridge arm module, until low-pressure side The second end of capacitor CL.During being somebody's turn to do, the second inductance L2 in the second bridge arm module and the third inductance in third bridge arm module L3 is " just " flow direction, and electric current is gradually increased, the second inductance L2 in the second bridge arm module and the in third bridge arm module The three equal energy storage of inductance L3, the electric current of the first inductance L1 in the first bridge arm module is " just " flow direction, but electric current is gradually reduced, first The first inductance L1 in bridge arm module releases energy, charges to high-pressure side first capacitor CH1, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, and electric current is by first capacitor CH1 First end flow to the anode of second source, the negative terminal of third capacitor CH3 is flowed back to from the negative terminal of second source.During being somebody's turn to do, the One capacitor CH1, the second capacitor CH2 and third capacitor CH3 release energy, and first capacitor CH1, the second capacitor CH2 and third capacitor CH3 are equal It flows to, and electric current is gradually reduced, charges to second source, until next timing to be " negative ".
2, Buck circuit is constructed when second source voltage is higher than a reference value, realizes the charge control to the first power supply, side Method is as follows:
T1 ' timing: second switch in the first bridge arm module, third, the 4th switching tube and third in the second bridge arm module The 5th switching tube is both turned in bridge arm module, and rest switch pipe is turned off.As shown in figure 8, at this point, current direction is, high-pressure side The first end of first capacitor CH1 passes through the second switch S4 in the first bridge arm module, the first inductance in the first bridge arm module L1, it low pressure lateral capacitance CL, the body diode D2 of third switching tube S2 in the second bridge arm module, the 4th opens in the second bridge arm module Close the second end that the S6 in pipe is back to high-pressure side first capacitor CH1;The second inductance L2 passes through low-pressure side electricity in second bridge arm module Hold CL, the body diode D2 of third switching tube S2 in the second bridge arm module is back to the second inductance L2 in the second bridge arm module and carries out Release energy;Third inductance L3 passes through low pressure lateral capacitance CL, the 5th switching tube S3 in third bridge arm module in third bridge arm module Body diode D3 is back to third inductance L3 in third bridge arm module and carries out releasing energy.During being somebody's turn to do, second in the second bridge arm module Third inductance L3 in inductance L2 and third bridge arm module is " negative " flow direction, and electric current is gradually reduced, to the first power source charges, The second inductance L2 in the second bridge arm module and third inductance L3 in third bridge arm module release can, in the first bridge arm module The electric current of first inductance L1 is " negative " flow direction, but electric current is gradually increased, the first inductance L1 energy storage in the first bridge arm module, high pressure Side first capacitor CH1 the first inductance L1 and first power source charges into the first bridge arm module, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, electric current by second source just The negative of second source is flowed back to by high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 in end End.During being somebody's turn to do, high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and the equal energy storage of high-pressure side third capacitor CH3, electric current It is " just " flow direction, and electric current is gradually increased, until next timing.
T3 ' timing: first switch tube in the first bridge arm module, the 4th switching tube and third bridge arm mould in the second bridge arm module The five, the 6th switching tubes are both turned in block, and rest switch pipe is turned off.As shown in figure 9, at this point, current direction is, the first bridge arm The first inductance L1 is back to by the body diode D1 of the first switch tube S1 in low pressure lateral capacitance CL, the first bridge arm module in module The first inductance L1 carries out releasing energy in first bridge arm module;The first end of high-pressure side the second capacitor CH2 passes through in the second bridge arm module The 4th switching tube in S6 ', the second inductance L2 in the second bridge arm module, low pressure lateral capacitance CL, in third bridge arm module S7 in the body diode D3 of 5th switching tube S3, third bridge arm module in the 6th switching tube is back to high-pressure side the second capacitor CH2 Second end;Third inductance L3 passes through the 5th switching tube in low pressure lateral capacitance CL, third bridge arm module in third bridge arm module The body diode D3 of S3 is back to third inductance L3 in third bridge arm module and carries out releasing energy.During being somebody's turn to do, in the first bridge arm module Third inductance L3 in first inductance L1 and third bridge arm module is " negative " flow direction, and electric current is gradually reduced, to the first power supply It charges, the third inductance L3 in the first inductance L1 and third bridge arm module in the first bridge arm module releases energy, the second bridge arm mould The electric current of the second inductance L2 in block is " negative " flow direction, but electric current is gradually increased, the second inductance L2 storage in the second bridge arm module Can, high-pressure side the second capacitor CH2 the second inductance L2 and first power source charges into the second bridge arm module, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, electric current by second source just The negative of second source is flowed back to by high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 in end End.During being somebody's turn to do, high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and the equal energy storage of high-pressure side third capacitor CH3, electric current It is " just " flow direction, and electric current is gradually increased, until next timing.
T5 ' timing: first switch tube in the first bridge arm module, third switching tube and third bridge arm mould in the second bridge arm module The six, the 7th switching tubes are both turned in block, and rest switch pipe is turned off.As shown in Figure 10, at this point, current direction is, the first bridge The first inductance L1 is returned by the body diode D1 of low pressure lateral capacitance CL, first switch tube S1 in the first bridge arm module in arm module Into the first bridge arm module, the first inductance L1 carries out releasing energy;In second bridge arm module the second inductance L2 by low pressure lateral capacitance CL, The body diode D2 of third switching tube S2 in second bridge arm module is back to the second inductance L2 in the second bridge arm module and carries out releasing energy; The first end of high-pressure side third capacitor CH3 passes through in S7 ' in the 6th switching tube in third bridge arm module, third bridge arm module Third inductance L3, low pressure lateral capacitance CL, the 7th switching tube S5 in third bridge arm module be back to high-pressure side third capacitor CH3's Second end;During being somebody's turn to do, the first inductance L1 in the first bridge arm module and the second inductance L2 in the second bridge arm module are " negative " flow direction, and electric current is gradually reduced, the first inductance L1 and the second bridge arm mould to the first power source charges, in the first bridge arm module The second inductance L2 in block releases energy, and the electric current of the third inductance L3 in third bridge arm module is " negative " flow direction, but electric current is gradually Increase, the third inductance L3 energy storage in third bridge arm module, high-pressure side third capacitor CH3 third inductance into third bridge arm module L3 and the first power source charges, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, electric current by second source just The negative of second source is flowed back to by high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 in end End.During being somebody's turn to do, high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and the equal energy storage of high-pressure side third capacitor CH3, electric current It is " just " flow direction, and electric current is gradually increased, until next timing.
T2 ', T4 ' and T6 ' timing: first switch tube in the first bridge arm module, in the second bridge arm module third switching tube and The 5th switching tube is both turned in third bridge arm module, and rest switch pipe is turned off.As shown in figure 11, at this point, current direction is, the The body diode that the first inductance L1 passes through low pressure lateral capacitance CL, first switch tube S1 in the first bridge arm module in one bridge arm module D1 is back to the first inductance L1 in the first bridge arm module and carries out releasing energy;The second inductance L2 passes through low pressure lateral capacitance in second bridge arm module The body diode D2 of third switching tube S2 in CL, the second bridge arm module is back to the second inductance L2 in the second bridge arm module and is released Energy;The body that third inductance L3 passes through low pressure lateral capacitance CL, the 5th switching tube S3 in third bridge arm module in third bridge arm module Diode D3 is back to third inductance L3 in third bridge arm module and carries out releasing energy.The first electricity during being somebody's turn to do, in the first bridge arm module The third inductance L3 in the second inductance L2 and third bridge arm module in sense L1, the second bridge arm module is " negative " flow direction, and electric Stream is gradually reduced, to the first power source charges, the first inductance L1 in the first bridge arm module, the second inductance in the second bridge arm module Third inductance L3 in L2 and third bridge arm module releases energy, until next timing.
High-pressure side first capacitor CH1, the second capacitor CH2 and third capacitor CH3 join end to end, electric current by second source just The negative of second source is flowed back to by high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and high-pressure side third capacitor CH3 in end End.During being somebody's turn to do, high-pressure side first capacitor CH1, high-pressure side the second capacitor CH2 and the equal energy storage of high-pressure side third capacitor CH3, electric current It is " just " flow direction, and electric current is gradually increased, until next timing.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (10)

1. a kind of two-way large velocity ratio dcdc converter of three-phase alternating expression, including low-pressure side, bridge arm unit and the high pressure being sequentially connected Side, it is characterised in that: the bridge arm unit includes the first bridge arm module, the second bridge arm module and third bridge arm mould sequentially in parallel Block;
First bridge arm module includes the first inductance, first switch tube and second switch;
Second bridge arm module includes the second inductance, third switching tube and the 4th switching tube;
The third bridge arm module includes third inductance, the 5th switching tube, the 6th switching tube and the 7th switching tube;
Wherein, the first end of first inductance, the second inductance and third inductance is all connected to the anode of low-pressure side;Described first The second end of inductance, the second inductance and third inductance respectively with first switch tube, third switching tube and the 5th switching tube first End is connected;The first switch tube, third switching tube, the second end of the 5th switching tube and the 7th switching tube first end be all connected with To the negative terminal of low-pressure side;The anode and negative terminal of the low-pressure side are respectively used to be connected with the anode and cathode of the first power supply;
The second end of first inductance, the second inductance and third inductance also respectively with second switch, the 4th switching tube and The second end of six switching tubes is connected;The first end and the 7th switching tube of the second switch, the 4th switching tube, the 6th switching tube Second end be sequentially connected respectively to high-pressure side, wherein the first end of second switch is connected on high-tension side anode;Described The second end of seven switching tubes is connected on high-tension side negative terminal;The on high-tension side anode and negative terminal are respectively used to and second source Anode is connected with cathode.
2. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 1, it is characterised in that: described low Pressing side includes low pressure lateral capacitance;The first end of first inductance, the second inductance and third inductance is all connected to low pressure lateral capacitance Anode;The first switch tube, third switching tube, the second end of the 5th switching tube and the 7th switching tube first end be all connected with To the negative terminal of low pressure lateral capacitance.
3. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 1, it is characterised in that: the height Pressure side includes the high-pressure side first capacitor being sequentially arranged, the second capacitor of high-pressure side and high-pressure side third capacitor, the high-pressure side the One capacitor is set between second switch and the 4th switching tube;Second capacitor of high-pressure side is set to the 4th switching tube and the 6th and opens It closes between pipe;The high-pressure side third capacitor is set between the 6th switching tube and the 7th switching tube.
4. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 1, it is characterised in that: described One switching tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube are by coupled in parallel body diode group At the 4th switching tube and the 6th switching tube are made of the transistor of two reverse parallel connections.
5. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 4, it is characterised in that: described One switching tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube first end and second end be respectively to collect Electrode and emitter.
6. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 1, it is characterised in that: described The driving signal reverse phase of one switching tube and second switch;The driving signal reverse phase of the third switching tube and the 4th switching tube; The driving signal reverse phase of 5th switching tube and the 6th switching tube.
7. the two-way large velocity ratio dcdc converter of a kind of three-phase alternating expression according to claim 1, it is characterised in that: described 120 ° of the driving signal interval of one switching tube, third switching tube and the 5th switching tube.
8. a kind of control method of the two-way large velocity ratio dcdc converter of three-phase alternating expression characterized by comprising
Obtain the demand for control that second source carries out charge and discharge to the first power supply;
Sample the voltage of current first power supply and the voltage of second source;
When second source voltage is lower than a reference value, successively using right described in T1-T6 timing control in a control period It is required that the two-way large velocity ratio dcdc converter of three-phase alternating expression described in any one of 1-7, make its work in Boost mode, first Power supply is in discharge mode;
When second source voltage is higher than a reference value, successively weighed using described in T1 '-T6 ' timing control in a control period Benefit requires the two-way large velocity ratio dcdc converter of three-phase alternating expression described in any one of 1-7, makes its work in Buck mode, and first Power supply is in charge mode.
9. the control method of the two-way large velocity ratio dcdc converter of three-phase alternating expression according to claim 8, it is characterised in that: The first switch tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube are by coupled in parallel body two Pole pipe composition, the 4th switching tube and the 6th switching tube are made of the transistor of two reverse parallel connections;
Under control in T1, T3 and T5 timing, the first switch tube, third switching tube and the 5th switching tube are both turned on, Rest switch pipe is turned off;
Under control in T2 timing, the first switch tube, the 4th switching tube, the 5th switching tube and the 6th switching tube are led Logical, rest switch pipe is turned off;
Under control in T4 timing, the first switch tube, third switching tube, the 6th switching tube and the 7th switching tube are led Logical, rest switch pipe is turned off;
Under control in T6 timing, the second switch, third switching tube, the 4th switching tube and the 5th switching tube are led Logical, rest switch pipe is turned off.
10. the control method of the two-way large velocity ratio dcdc converter of three-phase alternating expression according to claim 8, feature exist In: the first switch tube, second switch, third switching tube, the 5th switching tube and the 7th switching tube are by coupled in parallel Body diode composition, the 4th switching tube and the 6th switching tube are made of the transistor of two reverse parallel connections;
When under the control in T1 ' timing: the second switch, third switching tube, the 4th switching tube and the 5th switching tube are equal Conducting, rest switch pipe are turned off;
Under control in T3 ' timing, the first switch tube, the 4th switching tube, the 5th switching tube, the 6th switching tube are led Logical, rest switch pipe is turned off;
Under control in T5 ' timing, the first switch tube, third switching tube, the 6th switching tube and the 7th switching tube are equal Conducting, rest switch pipe are turned off;
Under control in T2 ', T4 ' and T6 ' timing, the first switch tube, third switching tube, the 5th switching tube are led Logical, rest switch pipe is turned off.
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CN112510980A (en) * 2020-11-30 2021-03-16 潍柴动力股份有限公司 Active discharge method and device of bidirectional DCDC converter and storage medium
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CN109617408A (en) * 2018-12-24 2019-04-12 北京交通大学 Based on the capacitor-clamped super high-gain boost converter of three-phase crisscross parallel
CN112583260A (en) * 2019-09-27 2021-03-30 株洲中车时代电气股份有限公司 Voltage stabilizing circuit, converter and rail train
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