CN108306543A - A kind of Multi-function ac/dc translation circuit and its control method - Google Patents
A kind of Multi-function ac/dc translation circuit and its control method Download PDFInfo
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- CN108306543A CN108306543A CN201810196045.9A CN201810196045A CN108306543A CN 108306543 A CN108306543 A CN 108306543A CN 201810196045 A CN201810196045 A CN 201810196045A CN 108306543 A CN108306543 A CN 108306543A
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- 230000006837 decompression Effects 0.000 claims description 27
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- 230000005611 electricity Effects 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000007600 charging Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 3
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- 238000000518 rheometry Methods 0.000 claims 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of Multi-function ac/dc translation circuit and its control methods, including first to fourth capacitance, first to fourth switching tube and transformation bridge, first to fourth capacitance to be located at DC side, and the transformation bridge location is in exchange side；The each segment of the present invention work in PWM mode only have first to second switch pipe or third to the 4th switching tube and with transformation bridge in some switching tube, totally three；Exchange can be both changed into direct current by this circuit, can also be exchange by DC inversion；When converting direct current function as exchange, input voltage can be followed per phase current, therefore have the function of PFC；No matter turning direct current as exchange in addition or direct current delivering the function of stream, this circuit all has the characteristics of more current potentials (voltage platform), therefore either which switching tube, it is to be much smaller than traditional voltage that it, which is opened and turns off born voltage, therefore its switching loss substantially reduces, and efficiency improves.
Description
Technical field
The present invention relates to ac-dc conversion fields, more particularly to a kind of Multi-function ac/dc translation circuit and its controlling party
Method.
Background technology
Existing ac-dc conversion circuit, there are larger switching losses, in addition, the voltage stress that switching tube is born
Greatly, it is unfavorable for the selection of component, influences properties of product.
The disclosure of background above technology contents is only used for inventive concept and the technical solution that auxiliary understands the present invention, not
The prior art for necessarily belonging to present patent application, no tangible proof show the above present patent application the applying date
In the case of having disclosed, above-mentioned background technology should not be taken to the novelty and creativeness of evaluation the application.
Invention content
It is above-mentioned existing to solve present invention aims at a kind of Multi-function ac/dc translation circuit of proposition and its control method
The big technical problem of switching loss existing for technology.
For this purpose, the present invention proposes a kind of Multi-function ac/dc translation circuit, including first to fourth capacitance, first to fourth
Switching tube and transformation bridge, first to fourth capacitance are located at DC side, and the transformation bridge location is in exchange side；The transformation bridge packet
The the 5th to the tenth switching tube is included, the drain electrode of first switch pipe is connected with the anode of third capacitance, the source electrode of first switch pipe and
The drain electrode of three switching tubes is connected, and the source electrode of third switching tube is connected with the anode of the cathode of third capacitance and the first capacitance, the 5th,
The drain electrode of six, the 9th switching tubes is connected with the drain electrode of the source electrode of first switch pipe and third switching tube, and the seven, the eight, the tenth
The source electrode of switching tube is connected with the drain electrode of the source electrode of the 4th switching tube and second switch pipe, the leakage of the seven, the eight, the tenth switching tubes
Pole is connected with the source electrode of the five, the six, the 9th switching tubes respectively, and is connected to inductive cell respectively, the source electrode of second switch pipe
It is connected with the cathode of the 4th capacitance, the drain electrode of second switch pipe is connected with the source electrode of the 4th switching tube, the 4th switching tube
Drain electrode is connected with the cathode of the anode of the 4th capacitance and the second capacitance, and the cathode of first capacitance and second capacitance are just
Extremely it is connected.
Preferably, the translation circuit of the Multi-function ac/dc translation circuit for realizing exchange conversion at the work(of direct current
Energy；Including three-phase alternating current source, described first to third inductance is connected with the three-phase alternating current source respectively, first to fourth electricity
Hold is that DC load is powered.
Preferably, the translation circuit of the Multi-function ac/dc translation circuit for realizing DC inversion at the work(of exchange
Energy；Including first to fourth DC source, first to fourth DC source is connected in series with, and first to fourth capacitance is connected in parallel on respectively
The both ends of first to fourth DC source；Described first is connected to third inductance with AC load.
Preferably, by first to fourth switching tube first switch pipe and second switch pipe be substituted for the one or two pole
Pipe and the second diode；The positive drain electrode and third switching tube with the five, the six, the 9th switching tubes of first diode
Drain electrode is connected, and the cathode of the first diode is connected with the anode of third capacitance；The cathode of second diode and the 7th,
Eight, the source electrode of the source electrode of the tenth switching tube and the 4th switching tube is connected, the positive phase of the anode and the 4th capacitance of the second diode
Even.
Preferably, by first to fourth switching tube third switching tube and the 4th switching tube be substituted for the three or two pole
Pipe and the 4th diode；The drain electrode of the cathode and the five, the six, the 9th switching tubes of the third diode and first switch pipe
Source electrode is connected, and the anode of the third diode is connected with the anode of the cathode of third capacitance and the first capacitance；Described 4th 2
The anode of pole pipe is connected with the drain electrode of the source electrode and second switch pipe of the seven, the eight, the tenth switching tubes, the third diode
Cathode is connected with the anode of the cathode of the second capacitance and the 4th capacitance.
Preferably, the exchange side of the Multi-function ac/dc translation circuit is additionally provided with filter.
Preferably, the inductive cell includes first to third inductance, and described first to third inductance is arranged described
Bridge location is converted in one end of exchange side, the above-mentioned first to third inductance drain electrode with the ten, the eight, the 7th switching tube respectively
It is connected, and is connected respectively with the source electrode of the nine, the six, the 5th switching tube.
Preferably, the inductive cell is negative by the three-phase perception of the three-phase connectivity port access of the transformation bridge
It carries.
In addition, the invention also provides a kind of control methods of Multi-function ac/dc translation circuit, according to the three of exchange side
Phase, the voltage magnitude Relation acquisition segment of phase AC signal；To each phase voltage and the first to the second under current interval section
The total voltage of capacitance is compared, and is converted and is met the switching tube that the two-phase voltage of turn-on condition respectively correspond tos on bridge and be connected, and
Pwm control signal is applied to first to second switch pipe or third to the 4th switching tube；In three-phase compared with the total voltage of setting,
It is unsatisfactory for a phase voltage of turn-on condition, passes through two switching tubes on pair bridge arm of the transformation bridge corresponding with the phase voltage
In one apply pwm control signal conducting.
Preferably, the translation circuit of the control method for realizing exchange conversion at the function of direct current；Including three-phase
Alternating current source, for providing three-phase ac signal in exchange side；Described first to third inductance respectively with three-phase alternating current source phase
Even, first to fourth capacitance is powered for DC load；The total voltage is less than first voltage in the three-phase ac signal
With the absolute amplitude of second voltage；The third to the 4th switching tube apply pwm control signal, described first to second switch pipe
Meet the switching tube that the two-phase voltage of turn-on condition respectively correspond tos for afterflow, on the transformation bridge and passes through its anti-and diode
Automatic conducting.
Preferably, the translation circuit of the control method for realizing DC inversion at the function of exchange；Including first
To the 4th DC source, for providing direct current signal in DC side；First to fourth DC source is connected in series with, and first to fourth
Capacitance is connected in parallel on the both ends of first to fourth DC source respectively；Described first is connected to third inductance with AC load；It is described total
Voltage is higher than the absolute amplitude of first voltage and second voltage in the three-phase ac signal；Described first applies to second switch pipe
Pwm control signal, the third to the 4th switching tube is added to be used for afterflow, the two-phase voltage of turn-on condition is met on the transformation bridge
The switching tube respectively correspond toed is turned it on by applying high voltage platform.
Preferably, which leads to when the third to the 4th switching tube is both turned under pwm control signal control
It crosses corresponding inductance in exchange side two-phase voltage to carry out energy storage and divide, into decompression mode；When third to the 4th switch
When the cut-off of one or two of pipe, by corresponding inductance in exchange side two-phase voltage and described first in second switch pipe
The anti-and diode of one or two release can afterflow, into boost mode；When the phase for being unsatisfactory for turn-on condition
When the corresponding switching tube for applying pwm control signal of voltage is connected, energy storage is carried out by the corresponding inductance of exchange side and is boosted, into
Enter boost mode；When the phase voltage for being unsatisfactory for turn-on condition is corresponding applies the switching tube cut-off of pwm control signal,
Pass through other one of two switching tubes on the bridge arm of the corresponding inductance of exchange side and the transformation bridge corresponding with the phase voltage
The anti-and diode of a switching tube carries out releasing energy afterflow, keeps boost mode.
Preferably, which passes through when described first to second switch pipe is connected under pwm control signal control
Corresponding inductance carries out energy storage and divides in exchange side two-phase voltage, into decompression mode；It opens when described the first to the second
When closing the cut-off of one or two of pipe, pass through corresponding inductance in exchange side two-phase voltage and the third to the 4th switching tube
The anti-and diode of one or two release can afterflow, into platform model；When the phase for being unsatisfactory for turn-on condition
When the corresponding switching tube for applying pwm control signal of voltage is connected, energy storage is carried out by the corresponding inductance of exchange side and is divided, into
Enter decompression mode；When the phase voltage for being unsatisfactory for turn-on condition is corresponding applies the switching tube cut-off of pwm control signal,
Pass through other one of two switching tubes on the bridge arm of the corresponding inductance of exchange side and the transformation bridge corresponding with the phase voltage
The anti-and diode of a switching tube carries out releasing energy afterflow, into platform model.
Preferably, the control method is in afterflow, by first of conducting as afterflow to second switch pipe to reach same
Walk the purpose of rectification.
Finally, the invention also provides a kind of control methods of Multi-function ac/dc translation circuit, wherein the translation circuit
Including first to third capacitance, first to fourth switching tube, transformation bridge, the first inductance, described first to third capacitance is located at directly
Stream side, first inductance are located at exchange side；The transformation bridge include the 5th to the 8th switching tube, the drain electrode of first switch pipe with
The anode of third capacitance is connected, and the source electrode of first switch pipe is connected with the drain electrode of third switching tube, the source electrode of third switching tube and
The anode of the cathode of third capacitance and the first capacitance is connected, the drain electrode of the five, the 6th switching tubes and the source electrode of first switch pipe and
The drain electrode of third switching tube is connected, the leakage of the source electrode of the seven, the 8th switching tubes and the source electrode and second switch pipe of the 4th switching tube
Extremely it is connected, the drain electrode of the seven, the 8th switching tubes is connected with the source electrode of the five, the 6th switching tubes respectively, and with the one of the first inductance
End is connected, and the source electrode of second switch pipe is connected with the cathode of the second capacitance, the source of the drain electrode and the 4th switching tube of second switch pipe
Extremely it is connected, the drain electrode of the 4th switching tube is connected with the cathode of the anode of the second capacitance and the first capacitance；The translation circuit
For realizing exchange conversion at the function of direct current；Including alternating current source, for providing AC signal in exchange side；First inductance
It is connected with the alternating current source, described first to third capacitance powers for DC load；
To the voltage of AC signal compared with the voltage of the DC load of the first capacitance, when the alternating current source of the exchange side
When voltage is less than the voltage of the DC load of first capacitance, pass through a pair bridge arm for the transformation bridge corresponding with the phase voltage
On two switching tubes in apply pwm control signal with the opposite in phase one of first inductance and be connected, and convert on bridge
Switching tube on another bridge arm constitutes circuit, the first inductive energy storage boosting, into boost mode；
When voltage of the voltage of the alternating current source of the exchange side higher than first capacitance of the DC side：
Transformation bridge on meet turn-on condition corresponds to switching tube by its instead and diode be connected automatically；And extremely to the third
4th switching tube applies pwm control signal and is connected, and is the first capacitor charging, into decompression mode；It is controlled when in the PWM
Under signal, when one or two of described third to the 4th switching tube is ended, pass through the first inductance and described the first to the second
One or two of switching tube carries out afterflow, into boost mode.
Preferably, under the control of pwm control signal, when the cut-off of third switching tube, the conducting of the 4th switching tube, transformation electricity
Road is first and third capacitor charging；Or, under the control of pwm control signal, when the conducting of third switching tube, the 4th switching tube are cut
When only, translation circuit is the first and second capacitor chargings；Or, under the control of pwm control signal, when third to the 4th switching tube
When being turned off, translation circuit is first to third capacitor charging.
The beneficial effect of the present invention compared with the prior art includes：
The each segment of the present invention work in PWM mode only have first to second switch pipe or third to the 4th switching tube with
And with transformation bridge in some switching tube, totally three；Exchange can be both changed into direct current by this circuit, can also be by DC inversion
To exchange, therefore has the function of PFC；No matter turning direct current as exchange in addition or direct current delivering the function of stream, this circuit is all
Have the characteristics of more current potentials (voltage platform), therefore either which switching tube, it is remote small to open and turn off born voltage
In traditional voltage, therefore its switching loss substantially reduces, and efficiency improves.
Description of the drawings
Fig. 1 is the translation circuit structural schematic diagram of the specific embodiment of the invention；
Fig. 2 is the three-phase alternating current oscillogram in the three-phase alternating current source of the input of the specific embodiment of the invention.
Fig. 3 is that the exchange of the specific embodiment of the invention turns circuit decompression working condition signal one when direct current.
Fig. 4 is that the exchange of the specific embodiment of the invention turns circuit decompression working condition signal two when direct current.
Fig. 5 is that the exchange of the specific embodiment of the invention turns circuit boosting working condition signal one when direct current.
Fig. 6 is that the exchange of the specific embodiment of the invention turns circuit boosting working condition signal two when direct current.
Fig. 7 is the three-phase alternating current oscillogram of the output of the specific embodiment of the invention.
Fig. 8 is inversion decompression work signal one when the direct current of the specific embodiment of the invention delivers stream.
Fig. 9 is inversion decompression work signal two when the direct current of the specific embodiment of the invention delivers stream.
Figure 10 is inversion afterflow work signal one when the direct current of the specific embodiment of the invention delivers stream.
Figure 11 is inversion afterflow work signal two when the direct current of the specific embodiment of the invention delivers stream.
Figure 12 is the equivalent signal of the translation circuit DC side of the specific embodiment of the invention.
Figure 13 is the signal of the translation circuit exchange side setting N lines of the specific embodiment of the invention.
Figure 14 is the monodial dilatation electrical block diagram of the specific embodiment of the invention.
Specific implementation mode
With reference to embodiment and compares attached drawing invention is further described in detail.It is emphasized that
Following the description is only exemplary, the range being not intended to be limiting of the invention and its application.
With reference to the following drawings, non-limiting and nonexcludability embodiment will be described, wherein identical reference numeral indicates
Identical component, unless stated otherwise.
Embodiment 1：
As shown in Figure 1, the present embodiment proposes a kind of Multi-function ac/dc translation circuit, including first to fourth capacitance
C11, C12, C3, C2, first to fourth switching tube Q1~Q4, transformation bridge, first to third inductance L1~L3, the left side of attached drawing 1
For exchange side, the right is DC side, and exchange side can be used as the output or input of three-phase ac signal, and three-phase ac signal is divided into A
Phase, B phases and C phases, ideal voltage waveform is as shown in Fig. 2 between each phase, and phase differs 120 °.DC side be equipped with first to
4th capacitance C11, C12, C3, C2, exchange side are equipped with first to third inductance L1~L3；In the present embodiment, as shown in Fig. 1,
It is additionally provided with filter in exchange side, which can be electromagnetic interface filter, for filtering out electromagnetic interference；As shown in Figure 1, first
It is separately positioned in A phases, B phases and C phases to third inductance L1~L3, it, can also in some variant embodiments of the present embodiment
It is not provided with filter；In the present embodiment, one end of filter is connected to first to third inductance L1~L3, and the other end can be used as three
The output of phase AC signal for AC load to provide electric energy, and the function of translation circuit is that direct current delivers stream (inversion) at this time；
Three-phase alternating current source can be connected and provide electric energy for translation circuit, the function of translation circuit is that exchange turns direct current at this time；The present embodiment
In, as shown in Figure 1, the DC side on 1 the right of attached drawing includes the first DC source DC11, the second DC source DC12, third DC source DC3
With the 4th DC source DC2, the first DC source DC11, the second DC source DC12, third DC source DC3 and the 4th DC source DC2 that
This series connection, four DC sources can be the equivalent of DC load, by the first capacitance C11, the second capacitance C12, third capacitance C3 and
4th capacitance C2 is respectively as the first DC source DC11 of equivalent load, the second DC source DC12, third DC source DC3 and the
Four DC source DC2 provide voltage, and the function that translation circuit is realized at this time is that exchange turns direct current；Certainly, the first DC source DC11,
Two DC source DC12, third DC source DC3 and the 4th DC source DC2 can also be to provide what DC inversion exchanged for translation circuit
Power supply, the function of translation circuit is that direct current delivers stream (inversion) at this time；In the present embodiment, direct current delivers stream, the conduct of DC side
The DC source (first to fourth DC source DC11, DC12, DC3, DC2) of power supply, it should be appreciated that the DC source should not be simple
Be understood as battery or DC power supply, should also include other can provide the circuit of direct current energy, such as the inversion electricity of DC to DC
Road or DC inversion are the translation circuit of exchange.Conversely, when AC to DC, the Equivalent DC being connect with DC side loads
Also battery or DC power supply should not be simply understood as, can also be absorb direct current energy DC to DC inverter circuit or
Person's inversion is the translation circuit of exchange.
As shown in Figure 1, the transformation bridge includes the 5th to the tenth switching tube Q5~Q10, the first inductance L1, the second inductance L2
It is connected respectively with transformation bridge with third inductance L3, the 5th switching tube Q5 and the 7th switching tube Q7 are arranged on same bridge arm, accordingly
, the 6th switching tube Q6 and the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10 are also disposed on same bridge arm；
There are first to fourth switching tube Q1~Q4, the positive phase of the drain electrode and third capacitance C3 of first switch Q1 with what transformation bridging connect
Even, the source electrode of first switch pipe Q1 is connected with the drain electrode of third switching tube Q3, source electrode and the third capacitance C3 of third switching tube Q3
Cathode and the first capacitance C11 anode be connected, the drain electrode of the five, the six, the 9th switching tubes (Q5, Q6, Q9) and first switch
The drain electrode of the source electrode and third switching tube Q3 of pipe Q1 is connected, the source electrode of the 7th, the 8th, the tenth switching tube (Q7, Q8, Q10) and the
The drain electrode of the source electrode and second switch pipe Q2 of four switching tube Q4 is connected, the leakage of the seven, the eight, the tenth switching tubes (Q7, Q8, Q10)
Pole is connected with the source electrode of the five, the six, the 9th switching tubes (Q5, Q6, Q9) respectively, and respectively with the inductance of third, second and first
The one end of (L3, L2, L1) is connected, and the source electrode of second switch pipe Q2 is connected with the cathode of the 4th capacitance C2, second switch pipe Q2's
Drain electrode is connected with the source electrode of the 4th switching tube Q4, drain electrode and the anode of the 4th capacitance C2 and the second electricity of the 4th switching tube Q4
The cathode for holding C12 is connected, and the cathode of the first capacitance C11 is connected with the anode of the second capacitance C12.
Power switch Q1~Q10 is connect by driver with the grid of each switching tube, and driver is controlled by controller, control
Device realizes the conducting and cut-off of each switching tube by communicating, sampling.
In the present embodiment, the inductive cell being connect with converter is first to third inductance, as shown in Figure 1, first
It is arranged to third inductance in transformation bridge location in one end of exchange side, is connected respectively with the drain electrode of the ten, the eight, the 7th switching tubes,
And it is connected respectively with the source electrode of the nine, the six, the 5th switching tubes.In some alternative embodiments of the present embodiment, if converter
The access of three-phase connectivity port be three-phase inductive load, then can not have to setting first to third inductance, because three-phase is perceptual
First can be played in load to the equivalent effect of third inductance, therefore the inductive cell of translation circuit can be to pass through three-phase
Connectivity port access is three-phase inductive load, such as generator, motor.
The present embodiment combination attached drawing 2-6 will be described in the detailed embodiment that this translation circuit turns direct current as exchange；
To realize that exchange turns the function of direct current, in exchange side setting three-phase alternating current source, three-phase alternating current source is the translation circuit
Phase three-wire three alternating current source, as described above, including A phases, B phases and C phases, three-phase alternating current waveform is as shown in Fig. 2, should know
It is that the present embodiment is with the three-phase alternating current waveform of three-phase alternating current source standard as an example, purpose is to state this reality for convenience
Example is applied, in actual use, amplitude, the phase of the waveform in three-phase alternating current source will likely have mutation, however, can also
Same transform method is implemented to off-gauge three-phase alternating current source on the basic principle of the present embodiment and principle, the present invention will not
Exclude such situation.
In Fig. 1, input A represents input A phases, and input B represents input B phases, and input C represents input C phases；It retouches for convenience
It states, if three-phase voltage differs 120 °, and is sinusoidal voltage, every 360 ° cycles；In view of stating intuitive and convenient, arrived with 30 °
390 ° (30 ° of points in next period) be a complete cycle, therefore as shown in Fig. 2, each joint be respectively defined as AC (30 °),
BC(90°)、BA(150°)、CA(210°)、CB(270°)、AB(330°)、AC(30°/390°)；Zero crossing is designated as " O " point.Three
In phase AC wave shape, note AC points, BA points, CB points voltage be first voltage V1, note BC points, CA points, AB points voltage be second
Voltage V2, in DC side, according to the first voltage V1 and second voltage V2 of the three-phase ac signal in three-phase alternating current source, when each phase electricity
When pressure amplitude value is more than first voltage V1 or is less than second voltage V2, by the total voltage of equivalent DC load DC11+DC12
V11-V12 is set at less than V1-V2 absolute amplitudes, which is nominally VBuck；According to decompression principle, third switching tube Q3 and
4th switching tube Q4 is connected together, then meets the correspondence two-phase voltage of the voltage conditions and can be connected, after conducting, higher than VBuck's
Voltage can then constitute partial pressure on input inductance L (L1~L3), at this time inductive energy storage, meanwhile, which is in intermediate magnitude
Low pressure is to be unsatisfactory for a phase voltage of turn-on condition, then can open corresponding switching tube and amplitude direction phase on transformation bridge bridge arm
An anti-other phase is connected so that input inductance L corresponding with this also carries out energy storage, when Q3Q4 (or wherein
One) cut-off conducting after, then the inductance L electromotive force in the two-phase is reversed, is connected in series through first switch pipe with input voltage at this time
The anti-and diode of Q1 and second switch pipe Q2 carry out energy release；
For ease of description, the present embodiment takes the sections AC-BC to carry out schematic operational state；If since AC points, BC points are arrived, are
The sections AC-BC, section A phases are higher than C phases with B phase voltage amplitude absolute values, therefore in AC-BC segments, the width of A phase B phases
Value meets pressure-lowering condition (being higher than first voltage V1 and V2, be also higher than VBuck), and C phases are unsatisfactory for turn-on condition (less than the first electricity
V1 and V2 is pressed, VBuck is also lower than) it can only then boost after inductive energy storage, similar, remaining 5 segment in a cycle
(segment BC-BA；BA-CA；CA-CB；CB-AB；AB-AC) can also this analogize.
It is ACO sections and OBC sections that segment AC-BC can divide according to zero crossing O；ACO sections are first stated, as shown in figure 3, at this
The amplitude of section, A phase B phases meets pressure-lowering condition, and C phases can only then boost after inductive energy storage, therefore in ACO and OBC segments,
Convert bridge on correspond to the two-phase switching tube be the 9th switching tube Q9 and the 8th switching tube Q8, can by itself it is anti-simultaneously
Diode is connected and (can also impose high voltage platform to above-mentioned two switching tube, keep constantly on) automatically；When third switchs
After pipe Q3 and the 4th switching tube Q4 applies pwm control signal conducting, due to meeting pressure-lowering condition, electric current is from A phases by the first electricity
Feel L1, (electric current is anti-by it and diode, without applying drive signal, naturally it is also possible to impose high voltage by the 9th switching tube Q9
Platform), third switching tube Q3 and corresponding output equivalent load, then to the 4th switching tube Q4, (electric current passes through it to the 8th switching tube Q8
Anti- and diode, without applying drive signal, naturally it is also possible to impose high voltage platform), the second inductance L2 returns to B phases, simultaneously
7th switching tube Q7 applies PWM and is connected, and electric current converges to the 8th from C phases by third switching tube L3, the 7th switching tube Q7
Switching tube Q8 (electric current is anti-by it and diode, without applying drive signal, naturally it is also possible to impose high voltage platform) and B phases
Circuit is constituted, during this period, first switch pipe L1 and second switch pipe L2 constitute partial pressure state, i.e. energy storage, and L3 is also at energy storage
State.Under this state, the inductive energy storage of A phase B phases divides, and is decompression mode, and the inductive energy storage of C phases boosts, and is boost mode.
As shown in figure 4, according to the needs of control, in the state, boost by energy storage of the third inductance under laststate,
It makes it possible to the 5th switching tube Q5 and occurs forward bias after the pwm control signal of the 7th switching tube Q7 is closed, therefore C phases
Electric current may meet control needs, at this time can close the pwm control signal of the 7th switching tube Q7, then the phase first exits electricity
Feel energy storage pattern, due to the presence of third inductance, electromotive force reversely releases energy, and is boost mode, i.e. the electric current of A, B phases return
Road remains unchanged, and electric current passes through third inductance L3 from C phases, and the anti-and diode of the 5th switching tube Q5 converges to third switching tube
Q3 constitutes circuit.If according to control condition, the driving of third switching tube Q3 and the 4th switching tube Q4 is closed, the first inductance L1 and
Second inductance L2 electromotive force reversely releases energy, then enters boost mode, as shown in figure 5, electric current passes through the first inductance L1 from A phases, the
The anti-and diode of nine switching tube Q9, first switch pipe Q1 and corresponding output equivalent load, then to second switch pipe Q2 it is anti-simultaneously
Diode, the 8th switching tube Q8, the first inductance L2 return to B phases, while electric current is switched from C phases by third switching tube L3, the 5th
Pipe Q5 converges to first switch pipe Q1 and constitutes circuit.Certainly, if control needs, between Fig. 4 and the state of Fig. 5, it is also possible to
Before and after there is Q3 and Q4 respectively the case where shutdown, if Q3 is first turned off, in freewheel current circuit as the aforementioned, negative terminal (- Bus
End) electric current can only pass through Q4 reflux forming circuits, if Q4 is first turned off, the electric current of anode (+Bus) can only be flowed back shape by Q3
At circuit.
In the above process, due to the boosting of third inductance, then the voltage of the 5th one end switching tube Q5 is clamped by third inductance
Position is in certain value, and the current potential of the switching tube other end is by the total voltage VBuck clampers of the first capacitance and the second capacitance, therefore this will
Reduce voltage stress when the 5th switching tube afterflow, with it is traditional, from 0 current potential come the switching tube that turns off or be connected compared with have more
Small voltage stress；In third switching tube Q3 and the 4th switching tube Q4 conductings, the current potential close to exchange side is input voltage, is handed over
Flow the current potential of side by the total voltage VBuck clampers of the first capacitance and the second capacitance, therefore, voltage stress also smaller, when being ended
When, due to energy storage of the first to the second inductance in decompression mode, the inverse electromotive force of L1 and L2 will make Q1, Q2, Q3, Q4
One terminal potential continues to keep clamper in certain value, and for Q3 and Q4, voltage stress also by smaller, bears it
Voltage also than existing traditional voltage stress smaller, meanwhile, because when by Q1 and Q2 afterflows, Q1Q2 is close to DC side one end
Current potential is by the voltage clamping of the voltage of third capacitance and the 4th capacitance, in addition the inverse electromotive force of L1L2, then the electricity of Q1 and Q2
Compression also smaller.
It since threshold voltage phase C phase inductance energy storage is less by a narrow margin, can first stop, then can enter mould as shown in FIG. 6
Formula.
In conclusion during segment ACO work, that in PWM working conditions is only Q3, Q4 and Q7.
In OBC sections of sections, because between C phases have been changed to minus zone, but still it is that belong to amplitude relatively low, is unsatisfactory for decompression item
Part, so in the section, all in boost mode, it is therefore desirable to open the 5th switching tube Q5 and constitute circuit storage from positive section
Can, inductance releases energy, and is to constitute circuit by negative terminal, in addition quarter-phase circuit is then constant.Therefore its schematic diagram no longer table one by one
Show.Only Q3, Q4 and Q5 in PWM working conditions during the segment.
As shown in the following table 1 and 2, with the passage of phase, when each phase voltage enters other segments together, class like this
It pushes away, each segment, which works in PWM mode, to be only had third switching tube Q3 and the 4th switching tube Q4 and connect with three-phase alternating current source
Transformation bridge in some switching tube.When turning direct current as exchange, current potential more than one can be provided for DC load, and (voltage is flat
Platform) power supply, used for more current potentials (voltage platform) DC load, i.e., include intermediate N current potentials (voltage platform) in DC side,
Current potential (voltage platform) V11 of first capacitance C11 anodes, current potential (voltage platform) V3 of third capacitance C3 anodes, the second capacitance
Cathode potential (voltage platform) V4 of cathode potential (voltage platform) V12, the 4th capacitance C2 of C12 amounts to 5 current potential (voltages
Platform).Therefore, this circuit can provide electric energy for the DC load of different potentials demand.(voltage is flat for more current potentials of this circuit
Platform) the characteristics of, either which switching tube, it is the three phase full bridge much smaller than traditional mode to open and turn off born voltage
PFC rectifier voltages.Therefore its switching loss substantially reduces, and efficiency improves.
Meanwhile exchange as described above, when carrying out PWM control conductings to Q3 and Q4, meets turn-on condition when turning direct current
Two-phase is formed into a loop, and when Q3 and Q4 ends, then can be realized afterflow by Q1 and Q2, can be constituted circuit, correspondingly, discontented
One phase of sufficient turn-on condition can also constitute circuit by converting corresponding switching tube on bridge with other two-phase, thus it is guaranteed that
The waveform of voltage and electric current mutually follows, and realizes Active PFC (PFC).
In some alternative embodiments in the present embodiment, in above process, if in order to reduce loss, work as switching tube
Anti- and diode operation when rectification conducting state, driving can also be applied to it and reach synchronous rectification effect.I.e. to Fig. 5 and
During shown in Fig. 6, opens first switch pipe Q1 and second switch pipe Q2 then constitutes synchronous rectification, so as to obtain low conducting
Voltage improves efficiency.
Table 1, switching tube state table
Table 2, operating mode table
Above-mentioned state and integrated mode are routine, in this process, may there is dynamic or other feelings
Condition, it is therefore possible to can form other combination according to control needs.
In some alternative embodiments of the present embodiment, when this translation circuit only turns direct current as exchange, because first
Switching tube Q1 and second switch pipe Q2 only play afterflow, it is possible to by the first switch pipe Q1 in first to fourth switching tube
It is substituted for the first diode and the second diode with second switch pipe Q2；The anode of first diode is opened with the five, the six, the 9th
The drain electrode of the drain electrode and third switching tube Q3 of closing pipe is connected, and the cathode of the first diode is connected with the anode of third capacitance C3；The
The cathode of two diodes is connected with the source electrode of the source electrode of the seven, the eight, the tenth switching tubes and the 4th switching tube Q4, the second diode
Anode be connected with the anode of the 4th capacitance C2.
The present embodiment combination attached drawing 7-11 will be described in the detailed embodiment party that this translation circuit delivers stream as direct current
Formula；
To realize that exchange turns the function of direct current, the translation circuit DC side be arranged first to fourth DC source DC11,
DC12, DC3 and DC2, described first to fourth DC source DC11, DC12, DC3 and DC2 are connected in series with, first to fourth capacitance
C11, C12, C3 and C2 are connected in parallel on the both ends of first to fourth DC source DC11, DC12, DC3 and DC2 respectively；Described first to
Third inductance L1~L3 is connected with AC load.
The AC load includes that A phases, B phases are exported with C phases, and three-phase alternating current waveform is as shown in Figure 7.It should know,
The present embodiment is the three-phase alternating current waveform with standard as an example, purpose is, in order to facilitate statement the present embodiment, actually to make
Used time, amplitude, the phase of the three-phase alternating current waveform of output will likely have mutation, however, can also be in the present embodiment
Basic principle on same inverse method and principle, the present invention are implemented to the output of off-gauge three-phase alternating current will be not excluded for this
Class situation.
In Fig. 8, output A represents output A phases, and output B represents output B phases, and output C represents output C phases；It retouches for convenience
It states, if the three-phase voltage of output differs 120 °, and is sinusoidal voltage, every 360 ° cycles；In view of stating intuitive and convenient, with
30 ° to 390 ° (30 ° of points in next period) are a complete cycle, therefore as shown in fig. 7, each joint is respectively defined as AC
(30°)、BC(90°)、BA(150°)、CA(210°)、CB(270°)、AB(330°)、AC(30°/390°)；Zero crossing is designated as " O "
Point.In three-phase alternating current waveform, note AC points, BA points, CB points voltage be first voltage V1, note BC points, CA points, AB points voltage
For second voltage V2, in DC side, according to the first voltage V1 and second voltage V2 of the three-phase ac signal of output, when each phase electricity
Pressure amplitude value is more than first voltage V1 or when less than second voltage V2, by the first DC source and the second DC source (herein for etc.
Effect DC load) the total voltage V11-V12 of DC11+DC12 is set higher than V1-V2 absolute amplitudes, and which is nominally VStep；
According to inversion decompression principle, if output voltage is higher than first voltage V1 or is less than first voltage V2, first switch pipe Q1 and
Second switch pipe Q2 is connected together, while the switching tube at the correspondence bridge arm end for each phase being attached thereto is also open-minded, then meets the electricity
The correspondence two-phase voltage of press strip part can be connected, after conducting, voltage higher than VStep then can in input inductance L (L1~L3) structure
At partial pressure, inductive energy storage at this time connects the correspondence bridge arm of each phase after first switch pipe Q1 and the Q2 conductings of second switch pipe are closed
End switch pipe still keeps open-minded, then the inductance electromotive force in the two-phase is reversed, is opened at this time by third switching tube Q3 and the 4th
The anti-and diode and input voltage continuous current circuit in series for closing pipe Q4 carry out energy release；Meanwhile the moment is in centre
The low pressure of amplitude is to be unsatisfactory for a phase voltage of turn-on condition, then can open the switch that amplitude direction is corresponded on transformation bridge bridge arm
Pipe output voltage after control time is enough, is closed this and is opened so that outputting inductance L corresponding with this also carries out energy storage
Guan Guan is continued by the anti-and diode of another switching tube on a same bridge arm other phase opposite with amplitude direction
Conductance is logical, and energy release afterflow is carried out to input inductance.
For ease of description, the present embodiment takes the sections AC-BC to carry out schematic operational state；If since AC points, BC points are arrived, are
The sections AC-BC, section A phases are higher than C phases with B phase voltage amplitude absolute values, therefore in AC-BC segments, the width of A phase B phases
Value meets pressure-lowering condition and (is higher than first voltage V1 and V2, need to pass through third DC source DC3, the 4th DC source DC2 and total voltage
VStep is higher than the DC11 of V1-V2, and DC12 DC sources provide electric energy), C phases be unsatisfactory for turn-on condition (less than first voltage V1 and
V2 can provide electric energy by DC source DC11 and DC12), similar, remaining 5 segment (segment in a cycle
BC-BA；BA-CA；CA-CB；CB-AB；AB-AC) can also this analogize.
It is ACO sections and OBC sections that segment AC-BC can divide according to zero crossing O；ACO sections and OBC sections are taken to illustrate now
Working condition, remaining 5 sections in a cycle can with and so on.ACO sections are first stated, as shown in figure 8, in the section, A phases B
The amplitude of phase meets pressure-lowering condition, when first switch pipe Q1 and second switch pipe Q2 applies PWM controls conducting and three-phase bridge arm
8th switching tube Q8 and the 9th switching tube Q9 applies together after high voltage platform is held on, electric current by first switch pipe Q1,
9th switching tube Q9, the first inductance L1 reach A phase output terminals, while constituting voltage by three-phase equivalent load etc. and B phases (C phases)
The electric current in circuit, B phases passes through the first inductance L2, the 8th switching tube Q8, then arrives second switch pipe Q2, returns to DC power supply terminal,
During this, the first inductance L1 and the second inductance L2 constitute partial pressure state, i.e. energy storage is decompression mode.
As shown in figure 9, according to the needs of control, first switch pipe Q1 is closed, the PWM of second switch pipe Q2 drives, and the
One switching tube Q8 and the 9th switching tube Q9 drivings remain unchanged, this moment since A, the current loop of B phases can remain unchanged, then should
Inductance (the first inductance L1 and the second inductance L2) electromotive force in two-phase is reversed, passes through third switching tube Q3, the 4th switch at this time
The anti-and diode of pipe Q4 carries out energy release with input voltage continuous current circuit in series, then enters freewheeling mode (platform mould
Formula), the platform of the afterflow is the total voltage of the first DC source and the second DC source, therefore the voltage of afterflow is avoided as traditional
Three-phase inverting circuit is the same to carry out afterflow by platform voltage of 0 voltage platform, to increase the voltage stress of switching tube；Simultaneously
5th switching tube Q5 applies PWM and is connected, and electric current passes through third inductance L3 from the 5th switching tube Q5, reaches C phase output terminals, will
Voltage circuit is constituted with B phases (A phases) after equivalent load, third inductance L3 is in partial pressure energy storage state at this time, into decompression
Pattern；When the voltage or electric current of C phases may meet control needs, then the PWM of the 5th switching tube Q5 is closed, then the phase
Inductive energy storage pattern is first exited, electromotive force is reversed, and releases energy by the anti-and diode of the 7th switching tube Q7, into afterflow
Pattern (platform model), afterflow platform at this time is also the total voltage of the first DC source and the second DC source.I.e. as shown in Figure 10.
During the segment, that in PWM working conditions is only first switch pipe Q1, second switch pipe Q2, Yi Ji
Five switching tube Q5；8th switching tube Q8 and the 9th switching tube Q9 is then long logical, can be referred to as "high" driving.
If in OBC sections of sections, because between C phases have been changed to minus zone, but still it is that belong to amplitude relatively low, is unsatisfactory for being depressured
Condition, so in the section, it is therefore desirable to open the 7th switching tube Q7 and be divided from inversion reduction voltage loop, inductance is constituted between minus zone
Energy storage, after the 7th switching tube Q7 is closed, electric discharge is then that and diode anti-by the 5th switching tube Q5 constitutes circuit, in addition two-phase
Circuit is then constant.Therefore its schematic diagram no longer faithful representation.Only first switch pipe Q1 in PWM working conditions during this
With second switch pipe Q2 and the 7th switching tube Q7.8th switching tube Q8 and the 9th switching tube Q9 is then long logical.
With the passage of phase, when each phase voltage enters other segments together, draw analogous conclusions, each segment work
Make in PWM mode and there was only certain in third switching tube Q3 and the 4th switching tube Q4 and the three phase full bridge being connect with three-phase equivalent load
One switching tube.Certainly, if control needs, between Fig. 8 and state shown in Fig. 9, it is also possible to before there is Q1 and Q2 respectively
After the case where turning off, if Q2 is first turned off, in current loop as the aforementioned, negative terminal (- Bus) electric current can only pass through Q4 afterflow shapes
At circuit, if Q1 is first turned off, the electric current of anode (+Bus) can only be formed into a loop by Q3 afterflows.
When delivering stream as direct current, in the power supply that DC side is multiple current potentials (voltage platform), i.e., in DC side includes
Between N current potentials (voltage platform), current potential (voltage platform) V11 of the first capacitance C11 anodes, the current potential of third capacitance C3 anodes
(voltage is flat for the cathode potential of cathode potential (voltage platform) V12, the 4th capacitance C2 of (voltage platform) V3, the second capacitance C12
Platform) V4, amount to 5 current potentials (voltage platform).Due to being inputted with more current potentials, due to the multiple current potentials of DC side (voltage platform)
In the presence of, either which switching tube opens the voltage for turning off that born voltage is the inverter circuit much smaller than traditional mode,
Therefore its switching loss substantially reduces, and efficiency improves.
Table 3, switching tube state table
Table 4, inverter voltage pattern table
Such as preceding statement, need to enter back into freewheeling state after high voltage+BUS (V3) or low-voltage-BUS (V4) decompressions
We term it decompressions, if afterflow from other level-one medium voltage (such as V11 and V12) afterflow, it is continuous that we term it platforms
Stream, abbreviation platform.And known to the Such analysis when voltage is in amplitude absolute value medium voltate, when decompression is from correspondence
The platform decompression (C phases as shown in Figure 9, Q5 apply PWM controls, and when conducting is depressured using V11 as platform) in amplitude direction, simultaneously
Its afterflow be certainly from reversed platform afterflow (C phases as shown in Figure 10 carry out afterflow when Q5 ends by platform of V12), rather than
From minimum-BUS or ceiling voltage+BUS afterflows；If being in amplitude absolute value high voltage, when decompression is from corresponding amplitude side
To highest (or minimum) voltage step-down (as shown in figure 8, circuit is realized with voltage V3 and V4 by Q1 and Q2 when decompression), together
When its afterflow be from the platform afterflow of corresponding direction (completing afterflow by Q3 and Q4 with V11 and V12), so whole process certainly
In voltage stress reduce, switching loss substantially reduces；Efficiency is substantially better than traditional two voltage platforms or three voltage platforms.
In some alternative embodiments of the present embodiment, when translation circuit only delivers the function of stream as direct current, at this time
Because third switching tube Q3 and the 4th switching tube Q4 are only used as afterflow to act on, it is possible to by the in first to fourth switching tube
Three switching tube Q3 and the 4th switching tube Q4 are substituted for third diode and the 4th diode；The cathode of the third diode and
Five, the source electrode of the drain electrode of the six, the 9th switching tubes and first switch pipe Q1 are connected, anode and the third electricity of the third diode
The anode of the cathode and the first capacitance C11 that hold C3 is connected；Anode and the seven, the eight, the tenth switching tubes of 4th diode
Source electrode and second switch pipe Q2 drain electrode be connected, the cathode and the 4th of the cathode of the third diode and the second capacitance C12
The anode of capacitance C2 is connected.
In the present embodiment, DC side can also be equivalent to circuit structure as shown in figure 12, or deformation as shown in figure 13,
N lines are provided in exchange side.
Embodiment 2：
In the present embodiment, single-phase or multiphase voltage transformation can also be realized by multiple single-phase Multi-functional changeover circuits
Or inversion；
As shown in figure 14, it is a single-phase Multi-functional changeover circuit, including the translation circuit includes first electric to third
Hold C1, C2, C3, first to fourth switching tube Q1, Q2, Q3, Q4, transformation bridge, the first inductance L1, described first to third capacitance position
It is located at exchange side in DC side, first inductance；The transformation bridge includes the 5th to the 8th switching tube Q5, Q6, Q7, Q8, the
The drain electrode of one switching tube Q1 is connected with the anode of third capacitance C3, the drain electrode of the source electrode and third switching tube Q3 of first switch pipe Q1
It is connected, the source electrode of third switching tube Q3 is connected with the anode of the cathode of third capacitance C3 and the first capacitance C1, the five, the 6th switches
The drain electrode of pipe Q5, Q6 are connected with the drain electrode of the source electrode of first switch pipe Q1 and third switching tube Q3, the seven, the 8th switching tube Q7,
The source electrode of Q8 is connected with the drain electrode of the source electrode of the 4th switching tube Q4 and second switch pipe Q2, the leakage of the seven, the 8th switching tube Q7, Q8
Pole is connected with the source electrode of the five, the 6th switching tube Q5, Q6 respectively, and is connected with one end of the first inductance L1, second switch pipe Q2
Source electrode be connected with the cathode of the second capacitance C2, the drain electrode of second switch pipe Q2 is connected with the source electrode of the 4th switching tube Q4, described
The drain electrode of 4th switching tube Q4 is connected with the cathode of the anode of the second capacitance C2 and the first capacitance C1；
The present embodiment proposes that exchange turns the control method of direct current based on the circuit, at this point, being equipped with alternating current source in exchange side, hands over
Stream source can be L phase input exchange signals, and O is inputted as N lines, can also be that L phases input a phase AC signal, O phases also input
One phase AC signal, when inputting two-phase voltage, O phases are opposite with the phase difference of L phases.First inductance is arranged in L phases, and described the
One powers to third capacitance for DC load.
To the voltage of AC signal compared with the voltage of the DC load of the first capacitance, when the alternating current source of the exchange side
When voltage is less than the voltage of the DC load of first capacitance, pass through a pair bridge arm for the transformation bridge corresponding with the phase voltage
On two switching tubes in apply pwm control signal with the opposite in phase one of first inductance and be connected, and convert on bridge
Switching tube on another bridge arm constitutes circuit, the first inductive energy storage boosting, into boost mode；
For example, with reference to the waveform of the A phase voltages in figure 2, A phase voltages are inputted to L phases, then when the voltage that L phases input is in
When positive half-wave, when voltage of the voltage of the alternating current source of exchange side less than the DC load of first capacitance, then it is unsatisfactory for dropping
Press strip part, at this point, Q8 need to be connected, electric current passes through the anti-and diode of the first inductance L1, the 8th switching tube Q8, the 7th switching tube Q7
O phases are returned to, under this state, the boosting of the first inductive energy storage.When in negative half-wave, similarly, then conducting Q6 is needed.
When voltage of the voltage of the alternating current source of exchange side higher than first capacitance of the DC side：
Transformation bridge on meet turn-on condition corresponds to switching tube by its instead and diode be connected automatically；And extremely to the third
4th switching tube applies pwm control signal and is connected, and is the first capacitor charging, into decompression mode；It is controlled when in the PWM
Under signal, when one or two of described third to the 4th switching tube is ended, pass through the first inductance and described the first to the second
One or two of switching tube carries out afterflow, into boost mode.
For example, with reference to the waveform of the A phase voltages in figure 2, A phase voltages are inputted to L phases, then when the voltage that L phases input is in
When positive half-wave, when voltage of the voltage of the alternating current source of exchange side higher than the DC load of first capacitance, then meet decompression
Condition, at this point, the anti-and diode forward biasing of Q6Q7, and pwm control signal is applied to Q3 and Q4, when Q3Q4 is controlled in PWM
When being connected under the control of signal, electric current will pass through the first inductance, the anti-and diode of the 6th switching tube, third switching tube, first
DC load (is equivalent to DC source) in figure, the anti-and diode of the 7th switching tube is formed into a loop to O phases, under this state, first
Inductive energy storage divides.When in negative half-wave, similarly, then conducting Q5Q8 forward bias is needed.
When meeting pressure-lowering condition, i.e., the voltage of the alternating current source of exchange side is higher than the electricity of the DC load of first capacitance
When pressure, the charge rule of three capacitances of DC side, general feelings can be selected as by the duty ratio of control pwm control signal
Under condition, it may make that one in third switching tube and the 4th switching tube is ended, a conducting, or both on or off.
Under the control of pwm control signal, when the cut-off of third switching tube, the conducting of the 4th switching tube, translation circuit the
One and third capacitor charging；At this point, being positive half-wave if it is L AC signals, energy is reversely released in the first inductance electromotive force, is entered
Boost mode, electric current pass through the first inductance, the anti-and diode of first switch pipe, and third DC load (is equivalent to direct current in figure
Source), the first DC load (is equivalent to DC source) in figure, the 4th switching tube, the 7th switching tube to O phases is formed into a loop.
Under the control of pwm control signal, when the conducting of third switching tube, the cut-off of the 4th switching tube, translation circuit the
One and second capacitor charging；At this point, being positive half-wave if it is L AC signals, energy is reversely released in the first inductance electromotive force, is entered
Boost mode, electric current pass through the first inductance, third switching tube, and the first DC load (is equivalent to DC source) in figure, the second direct current
It loads (DC source is equivalent in figure), the anti-and diode of second switch pipe, the 7th switching tube to O phases is formed into a loop.
Under the control of pwm control signal, when third is turned off to the 4th switching tube, translation circuit is first to third
Capacitor charging.At this point, being positive half-wave if it is L AC signals, energy is reversely released in the first inductance electromotive force, into boosting mould
Formula, electric current pass through the first inductance, the anti-and diode of first switch pipe, and the first DC load (is equivalent to DC source) in figure, the
Two DC loads (are equivalent to DC source) in figure, the anti-and diode of second switch pipe, the 7th switching tube to O phases is formed into a loop.
No matter under the pwm control signal control of which kind of duty ratio, it is similar to one same principle of embodiment, can be made
The voltage stress of each switching tube reduces, and has the function of PFC.
Single-phase circuit can form three-phase by three independent circuits by crisscross parallel, realize three phase rectifier.
It would be recognized by those skilled in the art that it is possible to make numerous accommodations to above description, so embodiment is only
For describing one or more particular implementations.
Although having been described and describing the example embodiment for being counted as the present invention, it will be apparent to those skilled in the art that
It can be variously modified and is replaced, without departing from the spirit of the present invention.Furthermore it is possible to make many modifications with will be special
Condition of pledging love is fitted to the religious doctrine of the present invention, without departing from invention described herein central concept.So the present invention is unrestricted
In specific embodiment disclosed here, but the present invention may further include belonging to all embodiments of the scope of the invention and its being equal
Object.
Claims (16)
1. a kind of Multi-function ac/dc translation circuit, it is characterised in that：Including first to fourth capacitance, first to fourth switching tube
With transformation bridge, first to fourth capacitance is located at DC side, and the transformation bridge location is in exchange side；
The transformation bridge includes the 5th to the tenth switching tube, and the drain electrode of first switch pipe is connected with the anode of third capacitance, and first
The source electrode of switching tube is connected with the drain electrode of third switching tube, the source electrode of third switching tube and the cathode of third capacitance and the first capacitance
Anode be connected, drain electrode and the source electrode of first switch pipe and the drain electrode phase of third switching tube of the five, the six, the 9th switching tubes
Even, the source electrode of the seven, the eight, the tenth switching tubes is connected with the drain electrode of the source electrode of the 4th switching tube and second switch pipe, and the 7th, the
Eight, the drain electrode of the tenth switching tube is connected with the source electrode of the five, the six, the 9th switching tubes respectively, and is connected to inductive cell respectively,
The source electrode of second switch pipe is connected with the cathode of the 4th capacitance, and the drain electrode of second switch pipe is connected with the source electrode of the 4th switching tube,
The drain electrode of 4th switching tube is connected with the cathode of the anode of the 4th capacitance and the second capacitance, the cathode of first capacitance with
The anode of second capacitance is connected.
2. Multi-function ac/dc translation circuit as described in claim 1, it is characterised in that：The translation circuit is for realizing friendship
Rheology changes the function of direct current into；Including three-phase alternating current source, described first to third inductance is connected with the three-phase alternating current source respectively,
First to fourth capacitance is powered for DC load.
3. Multi-function ac/dc translation circuit as described in claim 1, it is characterised in that：The translation circuit is for realizing straight
Stream is reverse into the function of exchange；Including first to fourth DC source, first to fourth DC source is connected in series with, and first to
Four capacitances are connected in parallel on the both ends of first to fourth DC source respectively；Described first is connected to third inductance with AC load.
4. Multi-function ac/dc translation circuit as claimed in claim 2, it is characterised in that：By first to fourth switching tube
In first switch pipe and second switch pipe be substituted for the first diode and the second diode；First diode anode with
The drain electrode of five, the six, the 9th switching tubes and the drain electrode of third switching tube are connected, cathode and the third capacitance of the first diode
Anode is connected；The cathode of second diode and the source electrode of the seven, the eight, the tenth switching tubes and the source electrode phase of the 4th switching tube
Even, the anode of the second diode is connected with the anode of the 4th capacitance.
5. Multi-function ac/dc translation circuit as claimed in claim 3, it is characterised in that：By first to fourth switching tube
In third switching tube and the 4th switching tube be substituted for third diode and the 4th diode；The cathode of the third diode with
The drain electrode of five, the six, the 9th switching tubes and the source electrode of first switch pipe are connected, anode and the third electricity of the third diode
The anode of the cathode of appearance and the first capacitance is connected；The source electrode of the anode and the seven, the eight, the tenth switching tubes of 4th diode
And the drain electrode of second switch pipe is connected, the positive phase of the cathode of the third diode and the cathode of the second capacitance and the 4th capacitance
Even.
6. Multi-function ac/dc translation circuit according to any one of claims 1 to 5, it is characterised in that：Exchange side is additionally provided with filtering
Device.
7. Multi-function ac/dc translation circuit as described in claim 1, it is characterised in that：The inductive cell includes first
To third inductance, described first to third inductance is arranged in the transformation bridge location in one end of exchange side, and above-mentioned first to third
Inductance is connected with the drain electrode of the ten, the eight, the 7th switching tube respectively, and respectively with the nine, the six, the 5th switching tube
Source electrode be connected.
8. Multi-function ac/dc translation circuit as described in claim 1, it is characterised in that：The inductive cell is passes through
State the three-phase inductive load of the three-phase connectivity port access of transformation bridge.
9. a kind of control method of the Multi-function ac/dc translation circuit as described in claim 1-8 is any, it is characterised in that：According to
Phase, the voltage magnitude Relation acquisition segment of the three-phase ac signal of exchange side；
To each phase voltage under current interval section compared with the total voltage of the first to the second capacitance, converts and meet turn-on condition on bridge
The switching tube that respectively correspond tos of two-phase voltage be connected, and first to second switch pipe or third to the 4th switching tube are applied
Add pwm control signal；In three-phase compared with the total voltage of setting, be unsatisfactory for a phase voltage of turn-on condition, by pair with the phase
One in two switching tubes on the bridge arm of the corresponding transformation bridge of voltage applies pwm control signal conducting.
10. control method as claimed in claim 9, which is characterized in that the translation circuit is for realizing exchange conversion Cheng Zhi
The function of stream；Including three-phase alternating current source, for providing three-phase ac signal in exchange side；Described first to third inductance respectively with
The three-phase alternating current source is connected, and first to fourth capacitance is powered for DC load；
The total voltage is less than the absolute amplitude of first voltage and second voltage in the three-phase ac signal；
The third to the 4th switching tube applies pwm control signal, and described first to second switch pipe is used for afterflow, the transformation
Meet the switching tube that the two-phase voltage of turn-on condition respectively correspond tos on bridge to be connected automatically by its anti-and diode.
11. control method as claimed in claim 9, which is characterized in that the translation circuit strikes a bargain for realizing DC inversion
The function of stream；Including first to fourth DC source, for providing direct current signal in DC side；The first to fourth direct current subject string
Connection connection, first to fourth capacitance are connected in parallel on the both ends of first to fourth DC source respectively；Described first to third inductance with hand over
Current load is connected；
The total voltage is higher than the absolute amplitude of first voltage and second voltage in the three-phase ac signal；
Described first applies pwm control signal to second switch pipe, and the third to the 4th switching tube is used for afterflow, the transformation
Meet the switching tube that the two-phase voltage of turn-on condition respectively correspond tos on bridge to turn it on by applying high voltage platform.
12. control method as claimed in claim 10, which is characterized in that when the third to the 4th switching tube is controlled in PWM
When being both turned under signal control, energy storage is carried out by corresponding inductance in exchange side two-phase voltage and is divided, into decompression
Pattern；When one or two of third to the 4th switching tube is ended, by corresponding inductance in exchange side two-phase voltage and
Described first to one or two of second switch pipe anti-and diode release can afterflow, into boost mode；
When the phase voltage for being unsatisfactory for turn-on condition is corresponding applies the switching tube conducting of pwm control signal, pass through friendship
The corresponding inductance in stream side carries out energy storage and boosts, into boost mode；When the phase voltage for being unsatisfactory for turn-on condition corresponds to
Application pwm control signal switching tube cut-off when, pass through the corresponding inductance of exchange side and the change corresponding with the phase voltage
The anti-and diode of another switching tube of two switching tubes changed on the bridge arm of bridge carries out releasing energy afterflow, keeps boosting mould
Formula.
13. control method as claimed in claim 11, which is characterized in that when described first to second switch pipe in PWM controls
Under signal control when conducting, energy storage is carried out by corresponding inductance in exchange side two-phase voltage and is divided, into decompression mould
Formula；When one or two of described first to second switch pipe ends, pass through corresponding inductance in exchange side two-phase voltage
It carries out releasing energy afterflow with the anti-and diode of one or two of the third to the 4th switching tube, into platform model；
When the phase voltage for being unsatisfactory for turn-on condition is corresponding applies the switching tube conducting of pwm control signal, pass through friendship
The corresponding inductance in stream side carries out energy storage and divides, into decompression mode；When the phase voltage for being unsatisfactory for turn-on condition corresponds to
Application pwm control signal switching tube cut-off when, pass through the corresponding inductance of exchange side and the change corresponding with the phase voltage
The anti-and diode of another switching tube of two switching tubes changed on the bridge arm of bridge carries out releasing energy afterflow, into platform mould
Formula.
14. control method as claimed in claim 12, which is characterized in that in afterflow, pass through first of conducting as afterflow
To second switch pipe to achieve the purpose that synchronous rectification.
15. a kind of control method of Multi-function ac/dc translation circuit, the translation circuit include first to third capacitance, first to
4th switching tube, transformation bridge, the first inductance, described first to third capacitance is located at DC side, first inductance is located at exchange
Side；The transformation bridge includes the 5th to the 8th switching tube, and the drain electrode of first switch pipe is connected with the anode of third capacitance, and first opens
The source electrode for closing pipe is connected with the drain electrode of third switching tube, the source electrode of third switching tube and the cathode of third capacitance and the first capacitance
Anode is connected, and the drain electrode of the five, the 6th switching tubes is connected with the drain electrode of the source electrode of first switch pipe and third switching tube, the 7th,
The source electrode of 8th switching tube is connected with the drain electrode of the source electrode of the 4th switching tube and second switch pipe, the leakage of the seven, the 8th switching tubes
Pole is connected with the source electrode of the five, the 6th switching tubes respectively, and is connected with one end of the first inductance, the source electrode of second switch pipe and
The cathode of two capacitances is connected, and the drain electrode of second switch pipe is connected with the source electrode of the 4th switching tube, the drain electrode of the 4th switching tube
It is connected with the cathode of the anode of the second capacitance and the first capacitance；It is characterized in that：The translation circuit is for realizing exchange conversion
At the function of direct current；Including alternating current source, for providing AC signal in exchange side；First inductance and the alternating current source phase
Even, it described first to third capacitance powers for DC load；
To the voltage of AC signal compared with the voltage of the DC load of the first capacitance, when the voltage of the alternating current source of the exchange side
Less than the DC load of first capacitance voltage when, on the bridge arm by pair corresponding with the phase voltage transformation bridge
Being connected with one application pwm control signal of opposite in phase of first inductance in two switching tubes, it is another on bridge with converting
Switching tube on bridge arm constitutes circuit, the first inductive energy storage boosting, into boost mode；
When voltage of the voltage of the alternating current source of the exchange side higher than first capacitance of the DC side：
Transformation bridge on meet turn-on condition corresponds to switching tube by its instead and diode be connected automatically；And to the third to the 4th
Switching tube applies pwm control signal and is connected, and is the first capacitor charging, into decompression mode；When in the pwm control signal
Under, when one or two of described third to the 4th switching tube is ended, by the first inductance and described first to second switch
One or two of pipe carries out afterflow, into boost mode.
16. control method as claimed in claim 15, which is characterized in that under the control of pwm control signal, when third switchs
When pipe cut-off, the conducting of the 4th switching tube, translation circuit is first and third capacitor charging；
Or, under the control of pwm control signal, when the conducting of third switching tube, the cut-off of the 4th switching tube, translation circuit first
With the second capacitor charging；
Or, under the control of pwm control signal, when third is turned off to the 4th switching tube, translation circuit is first to third
Capacitor charging.
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| CN110198124A (en) * | 2019-06-14 | 2019-09-03 | 天津大学 | The two-way wide gain DC converter of switching capacity type three-phase crisscross parallel |
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