CN108448906A - Vector closes 360 ° of phase and amplitude controllable AC converters and its working method - Google Patents
Vector closes 360 ° of phase and amplitude controllable AC converters and its working method Download PDFInfo
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- CN108448906A CN108448906A CN201810427128.4A CN201810427128A CN108448906A CN 108448906 A CN108448906 A CN 108448906A CN 201810427128 A CN201810427128 A CN 201810427128A CN 108448906 A CN108448906 A CN 108448906A
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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, current or power
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
- H02M5/2932—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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, current or power
- H02M5/2937—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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, current or power using whole cycle control, i.e. switching an integer number of whole or half cycles of the AC input voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ac-Ac Conversion (AREA)
Abstract
The invention discloses a kind of vectors to close 360 ° of phase and amplitude controllable AC converters and its working method comprising sequentially connected three-phase input voltage changing module, single-phase Buck alternating current units circuit module and LC output filters；The external three-phase alternating current input voltage of three-phase input voltage changing module；The single-phase Buck alternating current units circuit module includes that the consistent A phase Buck alternating current units circuit of three circuit structures, B phases Buck alternating current units circuit and C phase Buck alternating current unit circuits, the output of the A phases Buck alternating current units circuit, B phases Buck alternating current units circuit and C phase Buck alternating current unit circuits are sequentially connected in series.The present invention can separately and continuously adjust the phase and amplitude of output voltage, and the phase angle of output voltage can be [00,3600] be adjusted in range, the failure rate of equipment is significantly reduced, extends the life cycle of equipment, and reduce maintenance cost, high-voltage fence can be easily accessed, so as to be transmitted control to the electric energy in high-voltage fence.
Description
Technical field
The present invention relates to Technics of Power Electronic Conversion technical fields, and in particular to a kind of 360 ° of phase and amplitude of vector conjunction are controllably handed over
Current converter and its working method.
Background technology
AC converter techniques are the technologies that a kind of AC energy is converted to another AC energy.
AC-DC-AC AC converters are two-stage circuit structure, can generally have buck amplitude to adjust and phase tune simultaneously
Energy saving power, but among it dc-link capacitance be generally easy to cause converter apparatus high failure rate, life cycle it is short and repair
The problems such as costly.
The application scenario of electrical isolation is converted and is not needed in same frequency, compared to other AC-AC AC converter techniques, in body
Product weight, audio-frequency noise, circuit structure, control strategy, conversion efficiency, net side power factor, current on line side harmonic content, output
Voltage waveform quality, dynamic property and reliability etc., Buck types, Boost type and Buck-Boost type AC-AC exchange conversions
Utensil has opposite comprehensive advantage.But Buck types, Boost type and Buck-Boost, Cuk, Sepic, the Zeta being derived
Equal AC-AC AC converters can only buck, i.e., can only adjusting amplitude, without phase adjusted ability.
In order to make AC-AC AC converters can buck adjusting amplitude and phase, those skilled in the art exist
It proposes that 2 frequency multiplication AC compounents are added in prime duty ratio on the basis of Buck-Boost cascade connection type AC-AC AC converters
（" phase and amplitude displaying controllable voltage regulator ",《Proceedings of the CSEE》, 2010, Vol.30, No.36, pp.86 ~ 92）, allow
Prime control phase, rear class control amplitude, but its control strategy slightly complicated, and be two-stage circuit structure, exist in circuit
Triple harmonic current and third harmonic voltage, furthermore the output voltage phase angle of the circuit can only be [- 300,300] in range into
Row is adjusted.
Therefore, a kind of new structural vector of design closes 360 ° of phase and amplitude controllable AC converters and its work side
Method makes it with more the application value in industry, which only has level-one, and the phase angle of output voltage can be [00,3600]
It is adjusted in range.
Invention content
The goal of the invention of the present invention is to provide a kind of vector and closes 360 ° of phase and amplitude controllable AC converters and its work
Method.
To achieve the above object of the invention, the technical solution adopted by the present invention is：A kind of 360 ° of phase and amplitude of vector conjunction can
Control AC converter comprising sequentially connected three-phase input voltage changing module, single-phase Buck alternating current units circuit module and LC are defeated
Go out filter；
The external three-phase alternating current input voltage of three-phase input voltage changing module；
The single-phase Buck alternating current units circuit module includes the consistent A phase Buck alternating current units circuit of three circuit structures, B phases
Buck alternating current units circuit and C phase Buck alternating current unit circuits, the A phases Buck alternating current units circuit, B phase Buck alternating current units
The output of circuit and C phase Buck alternating current unit circuits is sequentially connected in series.
In above-mentioned technical proposal, the three-phase input voltage changing module is three-phase input transformer or three-phase input transformer
Group.
In above-mentioned technical proposal, the primary side of the three-phase input transformer or three-phase input transformer group connects for triangle
It connects or star-like connection；
The A phase output terminals of the three-phase input transformer or the secondary side of three-phase input transformer group are connected to the Buck exchanges of A phases
The B phase output terminals of the secondary side of the input terminal of element circuit, the three-phase input transformer or three-phase input transformer group connect
To the input terminal of B phase Buck alternating current unit circuits, the secondary side of the three-phase input transformer or three-phase input transformer group
C phase output terminals are connected to the input terminal of C phase Buck alternating current unit circuits.
In above-mentioned technical proposal, the A phases Buck alternating current unit circuits include first switch pipe, second switch pipe, third
The emitter of switching tube and the 4th switching tube, the first switch pipe is connected with the emitter of second switch pipe, and the third is opened
The emitter of the emitter and the 4th switching tube that close pipe is connected, the current collection of the collector and third switching tube of the second switch pipe
Extremely it is connected, the collector of the first switch pipe is connected to the first exit point of the A phase output terminals of three-phase input voltage changing module,
The collector of 4th switching tube is connected to the second output terminal point of the A phase output terminals of three-phase input voltage changing module, and described
The collector of two switching tubes and the collector of third switching tube are connected to the front end of the filter inductance of LC output filters；
The B phases Buck alternating current unit circuits include the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube,
The emitter of 5th switching tube and the emitter of the 6th switching tube are connected, and the emitter and the 8th of the 7th switching tube is opened
The emitter for closing pipe is connected, and the collector of the 6th switching tube and the collector of the 7th switching tube are connected, the 5th switch
The collector of pipe is connected to the first exit point of the B phase output terminals of three-phase input voltage changing module, the collection of the 8th switching tube
Electrode is connected to the second output terminal point of the B phase output terminals of three-phase input voltage changing module；
The C phases Buck alternating current unit circuits include the 9th switching tube, the tenth switching tube, the 11st switching tube and the 12nd switch
Pipe, the emitter of the 9th switching tube and the emitter of the tenth switching tube are connected, the emitter of the 11st switching tube and
The emitter of 12nd switching tube is connected, and the collector of the tenth switching tube and the collector of the 11st switching tube are connected, institute
State the 9th switching tube collector be connected to three-phase input voltage changing module C phase output terminals the first exit point, the described tenth
The collector of two switching tubes is connected to the second output terminal point of the C phase output terminals of three-phase input voltage changing module；
The collector of 4th switching tube is connected to the public of the collector of the 6th switching tube and the collector of the 7th switching tube
End, the collector of the 8th switching tube are connected to the public of the collector of the tenth switching tube and the collector of the 11st switching tube
End.
In above-mentioned technical proposal, the LC output filters include output inductor and output filter capacitor；
The input terminal of the output inductor is connected with the collector of the collector of second switch pipe and third switching tube, described
The output end of output inductor is connected with output filter capacitor one end, and the other end of the output filter capacitor is opened with the 12nd
The collector for closing pipe is connected.
A kind of vector closes the working method of 360 ° of phase and amplitude controllable AC converters, defeated according to preset three-phase alternating current
Enter voltage, the connection type of three-phase input voltage changing module input terminal and the turn ratio and obtain AC converter, by adjusting the exchange
The duty ratio of the A phase Buck alternating current unit circuits of converter, the duty ratio of B phase Buck alternating current unit circuits are exchanged with C phases Buck
The duty ratio of element circuit determines the amplitude and phase of ac output voltage so that the phase angle of the phasor of ac output voltage
Change in three different interval ranges continuously in a circumferential respectively with amplitude, and the sum of three sections are 360 °.
Above, three sections refer to that two neighboring section has and only boundary is to overlap continuously in a circumferential.
In above-mentioned technical proposal, it is zero to make the duty ratio of the B phases Buck alternating current unit circuits, the Buck exchanges of control A phases
The duty ratio of the duty ratio and C phase Buck alternating current unit circuits of element circuit, controls phase angle and the width of the phasor of output voltage
Value changes within the scope of first interval；
It is zero to make the duty ratio of the C phases Buck alternating current unit circuits, controls the duty ratio and B of A phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, the phase angle and amplitude for controlling the phasor of output voltage become within the scope of second interval
Change；
It is zero to make the duty ratio of the A phases Buck alternating current unit circuits, controls the duty ratio and C of B phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, the phase angle and amplitude for controlling the phasor of output voltage become within the scope of 3rd interval
Change,
The first interval, second interval and 3rd interval continuously in a circumferential and itself and be 360 °.
In above-mentioned technical proposal, the first interval is [00,1200], the second interval is [2400,3600], it is described
3rd interval is [1200,2400]。
The operation principle of the present invention is that：When A phase Buck alternating current unit circuits input voltage be timing, first switch pipe,
Third switching tube high frequency complementation is connected, second switch pipe, the conducting of the 4th switching tube perseverance, and when A phase Buck alternating current unit circuits
When input voltage is negative, first switch pipe, the conducting of third switching tube perseverance, second switch pipe, the 4th switching tube high frequency complementation conducting；
When the input voltage of B phase Buck alternating current unit circuits is timing, the 5th switching tube, the 7th switching tube high frequency complementation are connected, and the 6th
Switching tube, the conducting of the 8th switching tube perseverance, and when the input voltage of B phase Buck alternating current unit circuits is negative, the 5th switching tube, the
Seven switching tube perseverances are connected, the 6th switching tube, the 8th switching tube high frequency complementation conducting；When the input of C phase Buck alternating current unit circuits
Voltage is timing, and the 9th switching tube, the 11st switching tube high frequency complementation are connected, the tenth switching tube, the conducting of the 12nd switching tube perseverance,
And when the input voltage of C phase Buck alternating current unit circuits is negative, the 9th switching tube, the conducting of the 11st switching tube perseverance, the tenth opens
Guan Guan, the 12nd switching tube high frequency complementation conducting.
Include frequency voltage components, base in the output voltage of the single-phase Buck alternating current units circuit of A phase, B phase, C phase three
Wave voltage component；And LC output filters filter out frequency voltage components, obtain containing only fundamental wave point at output filter capacitor both ends
The output voltage of amount；Relative to AC-input voltage, the amplitude and phase of ac output voltage are by three-phase input transformer or three
The duty ratio determination of the connection type, the turn ratio and each phase Buck alternating current unit circuits of the input terminal of phase input transformer group.
Since above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
1. the present invention discriminably continuously adjusts the amplitude of output voltage and phase, and the phase angle of output voltage can be
[00,3600] be adjusted in range, circuit topological structure is simple, control strategy is easy to implement, and improves the effect of converter
Rate and reliability, due to the intermediate dc bus energy-storage travelling wave tube without containing high failure rate（Capacitance）, significantly reduce equipment
Failure rate extends the life cycle of equipment, and reduces maintenance cost；
2. the present invention uses three-phase input transformer or three-phase input transformer group so that it is controllable that vector closes 360 ° of phase and amplitude
AC converter can easily access high-voltage fence, so as to be transmitted control to the electric energy in high-voltage fence；
3. the corresponding three different output voltage phase adjusted sections of the present invention, [00,1200], [1200,2400], [2400,
3600], combination obtains [00,3600] phase adjusted section.
Description of the drawings
Fig. 1 is that the vector of the embodiment of the present invention one closes the topological diagram of 360 ° of phase and amplitude controllable AC converters.
Fig. 2 is the schematic diagram of the phase and amplitude adjustable extent of the controllable AC converter of the embodiment of the present invention one.
Fig. 3 is the embodiment of the present invention one within a fundamental voltage period, each switching tube drive signal figure of A phases.
Wherein：1, three-phase alternating current input voltage；2, three-phase input voltage changing module；3, single-phase Buck alternating current units circuit mould
Block；4, LC output filters；5, ac output voltage；6, A phases Buck alternating current unit circuits；7, B phases Buck alternating current unit circuits；
8, C phases Buck alternating current unit circuits.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment one：
It is shown in Figure 1,360 ° of phase and amplitude controllable AC converters of a kind of vector conjunction comprising sequentially connected three-phase is defeated
Enter voltage changing module 2, single-phase Buck alternating current units circuit module 3 and LC output filters 4；
The external three-phase alternating current input voltage of the three-phase input voltage changing module 1；
The single-phase Buck alternating current units circuit module includes the consistent A phase Buck alternating current units circuit 6 of three circuit structures, B
Phase Buck alternating current units circuit 7 and C phase Buck alternating current units circuit 8, the A phases Buck alternating current units circuit, the Buck exchanges of B phases
The output of element circuit and C phase Buck alternating current unit circuits is sequentially connected in series.
In the present embodiment, the three-phase input voltage changing module is three-phase input transformer or three-phase input transformer group.
The three-phase input transformer or the primary side of three-phase input transformer group are that triangle connects or star-like connection,
After primary side three-phase alternating current is electrically isolated transformation, in secondary side for three Buck alternating current units processing of A phase, B phase, C phase；
Specifically, the A phase output terminals of the three-phase input transformer or the secondary side of three-phase input transformer group are connected to A phases
The B phases of the secondary side of the input terminal of Buck alternating current unit circuits, the three-phase input transformer or three-phase input transformer group are defeated
Outlet is connected to the input terminal of B phase Buck alternating current unit circuits, the three-phase input transformer or three-phase input transformer group
The C phase output terminals of secondary side are connected to the input terminal of C phase Buck alternating current unit circuits.
The A phases Buck alternating current unit circuits include first switch pipe S1, second switch pipe S2, third switching tube S3With
Four switching tube S4, the first switch pipe S1Emitter and second switch pipe S2Emitter be connected, the third switching tube S3
Emitter and the 4th switching tube S4Emitter be connected, the second switch pipe S2Collector and third switching tube S3Collection
Electrode is connected, the first switch pipe S1Collector be connected to three-phase input voltage changing module A phase output terminals first output
Terminal A 1, the 4th switching tube S4Collector be connected to three-phase input voltage changing module A phase output terminals second output terminal
Point A2, the second switch pipe S2Collector and third switching tube S3Collector be connected to the filtered electricals of LC output filters
Feel LfFront end；
The B phases Buck alternating current unit circuits include the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube
（It is indicated with block diagram in Fig. 1）, the emitter of the 5th switching tube and the emitter of the 6th switching tube are connected, the 7th switch
The emitter of the emitter of pipe and the 8th switching tube is connected, the collector of the collector and the 7th switching tube of the 6th switching tube
It is connected, the collector of the 5th switching tube is connected to the first exit point B1 of the B phase output terminals of three-phase input voltage changing module,
The collector of 8th switching tube is connected to the second output terminal point B2 of the B phase output terminals of three-phase input voltage changing module；
The C phases Buck alternating current unit circuits include the 9th switching tube, the tenth switching tube, the 11st switching tube and the 12nd switch
Pipe（It is indicated with block diagram in Fig. 1）, the emitter of the 9th switching tube and the emitter of the tenth switching tube are connected, and the described 11st
The emitter of the emitter of switching tube and the 12nd switching tube is connected, the collector and the 11st switching tube of the tenth switching tube
Collector be connected, it is first defeated to be connected to the C phase output terminals of three-phase input voltage changing module for the collector of the 9th switching tube
Go out endpoint C1, the collector of the 12nd switching tube is connected to the second output of the C phase output terminals of three-phase input voltage changing module
Endpoint C2；
The 4th switching tube S4Collector be connected to the public affairs of the collector of the 6th switching tube and the collector of the 7th switching tube
End, the collector of the 8th switching tube are connected to the public affairs of the collector of the tenth switching tube and the collector of the 11st switching tube altogether
End altogether.
Switching tube used is IGBT switching tubes in the present embodiment, however the present invention is not limited in switching using IGBT
Pipe, can also be replaced with switch mosfet pipe etc., by taking switch mosfet pipe as an example, at this point, the source electrode of switch mosfet pipe
The emitter of corresponding IGBT switching tubes, the collector of the corresponding IGBT switching tubes of drain electrode of switch mosfet pipe.
The LC output filters are for filtering out in single-phase Buck alternating current units circuit module because switching tube high frequency break-make is produced
Raw high frequency harmonic components, including output inductor LfWith output filter capacitor Cf；
The output inductor LfInput terminal and second switch pipe S2Collector and third switching tube S3Collector phase
Even, the output inductor LfOutput end and output filter capacitor CfOne end is connected, the output filter capacitor CfIt is another
End is connected with the collector of the 12nd switching tube.
A kind of vector closes the working method of 360 ° of phase and amplitude controllable AC converters, defeated according to preset three-phase alternating current
Enter voltage, the connection type of three-phase input voltage changing module input terminal and the turn ratio and obtain AC converter, by adjusting the exchange
The duty ratio of the A phase Buck alternating current unit circuits of converter, the duty ratio of B phase Buck alternating current unit circuits are exchanged with C phases Buck
The duty ratio of element circuit determines the amplitude and phase of ac output voltage so that the phase angle of the phasor of ac output voltage
Change in three different interval ranges continuously in a circumferential respectively with amplitude, and the sum of three sections are 360 °.
Shown in Figure 2, it is zero to make the duty ratio of the B phases Buck alternating current unit circuits, controls A phase Buck alternating current units
The duty ratio of the duty ratio and C phase Buck alternating current unit circuits of circuit, the phase angle and amplitude for controlling the phasor of output voltage exist
The first interval 1. interior variation of range；
It is zero to make the duty ratio of the C phases Buck alternating current unit circuits, controls the duty ratio and B of A phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, control the phasor of output voltage phase angle and amplitude in second interval 2. range
Variation；
It is zero to make the duty ratio of the A phases Buck alternating current unit circuits, controls the duty ratio and C of B phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, control the phasor of output voltage phase angle and amplitude in 3rd interval 3. range
Variation,
The first interval 1., second interval 2. with 3rd interval 3. continuously in a circumferential and itself and be 360 °.
Wherein, 1. the first interval is [00,1200], 2. the second interval is [2400,3600], the third area
Between 3. be [1200,2400]。
Specifically, if A phase Buck alternating current unit input voltages areu ia1=UiA1Sin ω t, B phase Buck alternating current units input electricity
Pressure isu ib1=UiB1Sin (ω t-120 °), C phase Buck alternating current unit input voltagesu ic1=UiC1sin(ωt+120°)；If it is expected that handing over
Flow output voltageu oPhase first interval 1. in, thenu o=u ic1 d c +u ia1 d a , wherein B phases duty ratiod b =0；If it is expected that exchange
The phase of output voltage is 2. interior in second interval, thenu o=u ib1 d b +u ia1 d a , wherein C phases duty ratiod c =0；If desired output voltage
Phase 3rd interval 3. in, thenu o=u ib1 d b +u ic1 d c , wherein A phases duty ratiod a =0；If the phase of output voltage is in section
1., 2., 3. in variation, thenu o=u ia1 d a +u ib1 d b +u ic1 d c .By first interval 1. for,u o=u ic1 d c +u ia1 d a =u oc1+ u oa1,
Inu oc1For the fundametal compoment of C phase Buck alternating current unit circuit output ends,u oa1For the base of A phase Buck alternating current unit circuit output ends
Wave component,u oFor ac output voltage.
It is shown in Figure 3, by taking A phase Buck alternating current unit circuits as an example, gives A phases in a fundamental voltage period and respectively open
Close pipe drive signal sequential.When the input voltage of A phase Buck alternating current unit circuitsu ia1For timing, first switch pipe S1, third opens
Close pipe S3High frequency complementation is connected, second switch pipe S2, the 4th switching tube S4Perseverance conducting, and work as the defeated of A phase Buck alternating current unit circuits
Enter voltageu ia1When being negative, first switch pipe S1, third switching tube S3Perseverance conducting, second switch pipe S2, the 4th switching tube S4High frequency
Complementation conducting.Similar, when the input voltage of B phase Buck alternating current unit circuitsu ib1For timing, the 5th switching tube, the 7th switch
Pipe high frequency complementation is connected, the 6th switching tube, the conducting of the 8th switching tube perseverance, and when the input voltage of B phase Buck alternating current unit circuitsu ib1When being negative, the 5th switching tube, the conducting of the 7th switching tube perseverance, the 6th switching tube, the 8th switching tube high frequency complementation conducting；When C phases
The input voltage of Buck alternating current unit circuitsu ic1For timing, the 9th switching tube, the 11st switching tube high frequency complementation are connected, and the tenth
Switching tube, the conducting of the 12nd switching tube perseverance, and when the input voltage of C phase Buck alternating current unit circuitsu ic1When being negative, the 9th switch
Pipe, the conducting of the 11st switching tube perseverance, the tenth switching tube, the 12nd switching tube high frequency complementation conducting.
Include frequency voltage components, base in the output voltage of the single-phase Buck alternating current units circuit of A phase, B phase, C phase three
Wave voltage component；And LC output filters filter out frequency voltage components；Relative to three-phase alternating current input voltage, ac output voltage
Amplitude and phase by three-phase input alternating voltage, three-phase input transformer or three-phase input transformer group TiThe connection of input terminal
Mode, the turn ratio and each phase duty ratio determine.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
A variety of modifications of above-described embodiment will be apparent to those skilled in the art, it is as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to above-described embodiment shown in this article, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (8)
1. a kind of vector closes 360 ° of phase and amplitude controllable AC converters, it is characterised in that：It includes sequentially connected three-phase
Input voltage changing module, single-phase Buck alternating current units circuit module and LC output filters；
The external three-phase alternating current input voltage of three-phase input voltage changing module；
The single-phase Buck alternating current units circuit module includes the consistent A phase Buck alternating current units circuit of three circuit structures, B phases
Buck alternating current units circuit and C phase Buck alternating current unit circuits, the A phases Buck alternating current units circuit, B phase Buck alternating current units
The output of circuit and C phase Buck alternating current unit circuits is sequentially connected in series.
2. vector according to claim 1 closes 360 ° of phase and amplitude controllable AC converters, it is characterised in that：Described three
Mutually input voltage changing module is three-phase input transformer or three-phase input transformer group.
3. vector according to claim 2 closes 360 ° of phase and amplitude controllable AC converters, it is characterised in that：Described three
Phase input transformer or the primary side of three-phase input transformer group are triangle connection or star-like connection；
The A phase output terminals of the three-phase input transformer or the secondary side of three-phase input transformer group are connected to the Buck exchanges of A phases
The B phase output terminals of the secondary side of the input terminal of element circuit, the three-phase input transformer or three-phase input transformer group connect
To the input terminal of B phase Buck alternating current unit circuits, the secondary side of the three-phase input transformer or three-phase input transformer group
C phase output terminals are connected to the input terminal of C phase Buck alternating current unit circuits.
4. vector according to claim 1 closes 360 ° of phase and amplitude controllable AC converters, it is characterised in that：The A
Phase Buck alternating current unit circuits include first switch pipe, second switch pipe, third switching tube and the 4th switching tube, and described first opens
The emitter for closing pipe is connected with the emitter of second switch pipe, the transmitting of the emitter and the 4th switching tube of the third switching tube
Extremely it is connected, the collector of the second switch pipe is connected with the collector of third switching tube, the collector of the first switch pipe
It is connected to the first exit point of the A phase output terminals of three-phase input voltage changing module, the collector of the 4th switching tube is connected to
The second output terminal point of the A phase output terminals of three-phase input voltage changing module, the collector and third switching tube of the second switch pipe
Collector be connected to LC output filters filter inductance front end；
The B phases Buck alternating current unit circuits include the 5th switching tube, the 6th switching tube, the 7th switching tube and the 8th switching tube,
The emitter of 5th switching tube and the emitter of the 6th switching tube are connected, and the emitter and the 8th of the 7th switching tube is opened
The emitter for closing pipe is connected, and the collector of the 6th switching tube and the collector of the 7th switching tube are connected, the 5th switch
The collector of pipe is connected to the first exit point of the B phase output terminals of three-phase input voltage changing module, the collection of the 8th switching tube
Electrode is connected to the second output terminal point of the B phase output terminals of three-phase input voltage changing module；
The C phases Buck alternating current unit circuits include the 9th switching tube, the tenth switching tube, the 11st switching tube and the 12nd switch
Pipe, the emitter of the 9th switching tube and the emitter of the tenth switching tube are connected, the emitter of the 11st switching tube and
The emitter of 12nd switching tube is connected, and the collector of the tenth switching tube and the collector of the 11st switching tube are connected, institute
State the 9th switching tube collector be connected to three-phase input voltage changing module C phase output terminals the first exit point, the described tenth
The collector of two switching tubes is connected to the second output terminal point of the C phase output terminals of three-phase input voltage changing module；
The collector of 4th switching tube is connected to the public of the collector of the 6th switching tube and the collector of the 7th switching tube
End, the collector of the 8th switching tube are connected to the public of the collector of the tenth switching tube and the collector of the 11st switching tube
End.
5. vector according to claim 4 closes 360 ° of phase and amplitude controllable AC converters, it is characterised in that：The LC
Output filter includes output inductor and output filter capacitor；
The input terminal of the output inductor is connected with the collector of the collector of second switch pipe and third switching tube, described
The output end of output inductor is connected with output filter capacitor one end, and the other end of the output filter capacitor is opened with the 12nd
The collector for closing pipe is connected.
6. a kind of vector according to any one of claim 1 ~ 5 closes the work of 360 ° of phase and amplitude controllable AC converters
Make method, it is characterised in that：According to the connection type of preset three-phase alternating current input voltage, three-phase input voltage changing module input terminal
AC converter is obtained with the turn ratio, by adjusting duty ratio, the B phases of the A phase Buck alternating current unit circuits of the AC converter
The duty ratio of Buck alternating current unit circuits and the duty ratio of C phase Buck alternating current unit circuits determine the amplitude of ac output voltage
And phase so that the phase angle of the phasor of ac output voltage and amplitude are respectively in three different section models continuously in a circumferential
Interior variation is enclosed, and the sum of three sections are 360 °.
7. vector according to claim 6 closes the working method of 360 ° of phase and amplitude controllable AC converters, feature
It is：It is zero to make the duty ratio of the B phases Buck alternating current unit circuits, controls the duty ratio and C of A phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, the phase angle and amplitude for controlling the phasor of output voltage become within the scope of first interval
Change；
It is zero to make the duty ratio of the C phases Buck alternating current unit circuits, controls the duty ratio and B of A phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, the phase angle and amplitude for controlling the phasor of output voltage become within the scope of second interval
Change；
It is zero to make the duty ratio of the A phases Buck alternating current unit circuits, controls the duty ratio and C of B phase Buck alternating current unit circuits
The duty ratio of phase Buck alternating current unit circuits, the phase angle and amplitude for controlling the phasor of output voltage become within the scope of 3rd interval
Change,
The first interval, second interval and 3rd interval continuously in a circumferential and itself and be 360 °.
8. vector according to claim 7 closes the working method of 360 ° of phase and amplitude controllable AC converters, feature
It is：The first interval is [00,1200], the second interval is [2400,3600], the 3rd interval is [1200,
2400]。
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