CN106257816A - Including the three-phase alternating current of three single-phase modules to the control of DC power converter - Google Patents
Including the three-phase alternating current of three single-phase modules to the control of DC power converter Download PDFInfo
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- CN106257816A CN106257816A CN201510531074.2A CN201510531074A CN106257816A CN 106257816 A CN106257816 A CN 106257816A CN 201510531074 A CN201510531074 A CN 201510531074A CN 106257816 A CN106257816 A CN 106257816A
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- 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
Abstract
It relates to a kind of electric power converter and the method for control electric power converter.A kind of isolation AC to DC electric power converter worked from three-phase AC power source in the case of not having neutral point to connect while wide bandwidth output being provided and exempts high source impedance.This transducer includes three single-phase two-stage AC to DC transducers, and its input star (or Y shape) connects and its output-parallel connects.Control three single-phase two-stage AC to DC transducers in a new way and with balance punctate opacity of the cornea and equalize shared power.Can be for this single phase converter of cost, efficiency and reliability optimization.
Description
Technical field
The invention belongs to power electronic equipment field, more particularly, to from three-phase alternating current (AC)
It is input to electric power conversion and control thereof that single isolated DC (DC) exports.
Background technology
In three-phase power is changed, it is desirable to equally extract electric power from whole three phases, with from AC electricity
Source obtains maximum output and the minimal losses obtaining in AC power supplies.Although existing many admissible
Three-phase power converter topologies, but attracting be, it is considered to use enjoy high efficiency, high reliability,
Low noise and three single-phase AC to DC transducers of low cost.These single phase converter are at its parts
Rated value aspect optimize for phase voltage (phase to neutral voltage), so logical
Chang Buneng phase is to these single phase converter that are connected (occurring 1.7 times of this voltage in this case).
These transducers and parallel connection can be connected between neutral point and each phase simply with star like arrangement
, to realize the purpose of balance phase power, but there are some to this practice and oppose in its output.
In certain aspects, it is insecure that neutral point connects, and if it occur that neutral point disconnects,
Then single phase converter will likely closedown due to AC overvoltage or under-voltage, and be likely to therefore
Barrier.And in some instances, neutral point is not run wires to the junction point of equipment, and
Sometimes due to triangle connect secondary windings and neutral point can not be obtained from main supply transformator.
Because above reason, many users are not intended to the neutral point in their three-phase power transducer
Connect.
Exist and allow to use three single-phase turn in a star fashion in the case of not there is neutral point connection
The various schemes of parallel operation.Be identified as D1 to D3 below with reference to document in describe three and show
Example, is integrally incorporated into each list of references in present disclosure by cross reference.
At list of references D1 (" the A Three Phase of Gauger et al. on INTELEC in 1986
Off-Line Switching Power Supply with Unity Power Factor and Low TIF”)
In, cause the co-controlling of whole three voltage-boosting stages with or without the neutral point connected is steady
Determine punctate opacity of the cornea.Delay control is used to control to drive the least storage electric capacity before DC-DC converter
The output of the boosting power factor adjusting level of device, wherein DC-DC converter causes each single-phase conversion
Device carries the pulsating power of 100Hz, and it reduces efficiency and output is produced noise, in addition output ring
The low broadband on road is to weakening produced 300Hz output ripple almost without effect.This list of references
Teaching uses the co-controlling to voltage-boosting stage to be capable of stable punctate opacity of the cornea, but does not realize low in output
Noise, and need to arrange each DCDC for the peak power doubling mean power and turn
The size of parallel operation, this has significant cost loss.
At list of references D2 (" the Power Converter with of Tuch et al. in US 5757637
Star Configured Modules ") in, additional circuit is by punctate opacity of the cornea and the reason formed by three resistors
Think that neutral point compares, and provide quick correcting circuit to each voltage-boosting stage.Do not analyze this layout
Stability.Complexity is higher.This list of references provides the reference literary composition realizing punctate opacity of the cornea stability
Offering the alternative method of 1, this alternative method need not the pulsating power in any DC-DC converter,
But there is sizable complexity and uncertain performance.
At list of references D3 (" the A Simple of Heldwein et al. on the PESC of 1999
Control Strategy Applied to Three-Phase Rectifier Units for
Telecommunication Applications Using Single-Phase Rectifier Modules”)
In, supply single current demands to whole three the DCDC levels causing low output noise, but stay
Lower voltage-boosting stage self regulation.Unless be connected to neutral point, otherwise this arranges unstable at high power.
Inventor is expected to sacrifice never in any form in the case of the performance of transducer in three phase arrangement
The existing design of the single-phase two-stage converter of middle use.Develop for this purpose new control method and
Circuit, and be described below.
Summary of the invention
One aspect of the present invention provide a kind of do not have neutral point connect in the case of work three
Phase AC to DC electric power converter, this three-phase AC to DC electric power converter includes:
A) three Monophase electric power conversion modules, each Monophase electric power conversion module includes:
PFC (PFC) level, this power factor correction stage is configured to extract by its input
The input current that voltage is multiplied by controlled input demand signal and determines；
Energy-storage capacitor, this energy-storage capacitor is connected to the output of PFC level；And
DC to DC transducer (DCDC) level, this DC to DC converter level is connected to energy storage
Capacitor, and there is the output that can be output demand signal control,
Wherein, three Monophase electric power conversion modules are in its input Y-connection and at its output
It is connected in parallel；And
B) control circuit, this control circuit is used for determining input demand signal and output demand signal,
Make in use:
By the equal input demand signal one determined by the average voltage on three energy-storage capacitors
Rise and control whole three PFC levels；And
Individually controlling each DCDC level by output demand signal, this output demand signal includes:
Based on the total output electric current required for the load being connected to three-phase power transducer share
Output demand current, and
Voltage on the relevant energy-storage capacitor of corresponding module is adjusted required correction
Amount.
Another aspect provides one to control to work in the case of not having neutral point to connect
The method of three-phase AC to DC electric power converter, this transducer includes:
Three Monophase electric power conversion modules, each Monophase electric power conversion module includes:
PFC (PFC) level, this power factor correction stage is configured to extract by its input
The input current that voltage is multiplied by controlled input demand signal and determines；
Energy-storage capacitor, this energy-storage capacitor is connected to the output of power factor correction stage；And
DC to DC converter level (DCDC), this DC to DC converter level is connected to energy storage electricity
Container, and there is the output that can be output demand signal control,
Wherein, three Monophase electric power conversion modules are in its input Y-connection and at its output
It is connected in parallel, and
The method comprises the following steps:
Measure the voltage on each energy-storage capacitor；
Determine the average capacitor voltage on three energy-storage capacitors；
Generate the input demand signal of regulation average capacitor voltage；
By applying equal input demand signal to control whole three power factor correction stage together；
Measure the electric current output of the DCDC level from each module；And
Generating output demand signal for each DCDC level, this output demand signal includes:
Based on be connected to three-phase power transducer be supported on set under output voltage required
Total shared output demand current exporting electric current, and
Voltage on the relevant energy-storage capacitor of corresponding module is adjusted required correction
Amount；And
Each DCDC level is controlled based on corresponding output demand signal.
The further preferred feature of the present invention can be the feature as outlined in claims,
By cross reference, claims are merged into the part herein as present disclosure.
Make in the input impedance of PFC level to the equal input demand signal of three PFC levels is each
Behave like the resistor with equal value, and this is in the case of without connecting neutral point conductor
Make punctate opacity of the cornea stable.
The average voltage of three energy-storage capacitors of regulation rather than their each value, this permission to send
To equal input demand signal and the punctate opacity of the cornea stability to be maintained of PFC level, regardless of the most not
Balance or transient behaviour.In a preferred embodiment, as at single-phase two-stage AC-DC electric power converter
In generally occur, the closed-loop bandwidth relatively low (such as, 5Hz) of control loop can be made, this allows
High impedance source, such as motor generator is connected in the case of there is no stability problem.
It is preferably set up the size of each energy-storage capacitor to have little ripple voltage under total power,
Thus the conversion ratio that each DCDC level experience is nearly constant.In one embodiment, voltage loop
The output voltage of three DCDC levels is compared by amplifier with benchmark, and produces single sharing
DCDC exports current demand signal, thus suppresses any remaining 100Hz and 300Hz at output
Ripple (assumes 50Hz power supply).This amplifier ensures that the low noise in output and good transient state are rung
Should.
Preferably shared DCDC output demand signal is fed to three single output current loops
In amplifier, these output current loop amplifier by three of each DCDC level output electric currents with
Shared demand compares, and controls each DCDC level output electric current required for realizing also
Suppress the 100Hz ripple occurred at each DCDC output.Three DCDC levels are in parallel even due to it
Connect and realize equal output electric current and have equal output voltage, thus transmit equal output work
Rate.
In a preferred embodiment, use the loop amplifier with appropriate DC gain by each energy storage electricity
Condenser voltage compares with average energy-storage capacitor voltage, and its output is added to from each
The current feedback signal of DCDC level, or by from the current feedback signal from each DCDC level
Deduct, enabling carry out the control to each energy-storage capacitor voltage.It is advantageous that these loops
There is low closed-loop bandwidth (such as 4Hz), or 100Hz ripple will be applied to that the defeated of DCDC level
Go out on electric current.What the DC gain preferably making loop amplifier be enough to realize energy-storage capacitor voltage can
Accept coupling but not higher so that avoid the saturated of loop amplifier and from three loop amplifier
Be averagely output as zero, thus the existence that energy-storage capacitor controls is several to the output of voltage loop amplifier
Not impact.
When including (comprises/comprising) and grammatical variants is used in this specification,
Feature, entirety, step or parts or the existence of their group that explanation stated should be taken as, but
Do not preclude the presence or addition of one or more further feature, entirety, step, parts or they
Combination.
Accompanying drawing explanation
Fig. 1 shows prior art single-phase two-stage AC to the DC conversion with energy-storage capacitor C
The block diagram of device.
Fig. 2 shows three single phase converter as shown in Figure 1, and these three single phase converter is at it
Input Y-connection and be connected to three phase mains in the case of not having neutral point, and export also
Connection.
Fig. 3 shows the present invention preferred utilizing the circuit shown in Fig. 1 and Fig. 2 with ideal form
Embodiment.
Fig. 4 shows that of the single phase converter of the type that can use in the present invention may be real
Existing.This transducer includes diode bridge, booster circuit, capacitor C and isolation LLC resonance level.
Boost pressure controller includes making apparent input resistance with the multiplier controlling change in voltage.
Fig. 5 shows and makes punctate opacity of the cornea stablize and keep the cloth of average D/C voltage on three energy-storage capacitors
The realization put.
Fig. 6 shows that the stable punctate opacity of the cornea comprising Fig. 5 is arranged and each output electric current and sense of output voltage
Survey and the realization of the present invention of isolation control signal to DCDC level.
Fig. 7 shows the realization of control program according to a preferred embodiment of the invention.
Detailed description of the invention
Description, Fig. 1 shows the single phase converter with two power conversion stage.Power because of
Number correction (PFC) level comprises fairing and current control device so that PFC level can be extracted
The electric current proportional to input voltage, and transmit its energy to energy-storage capacitor C.Because AC is defeated
Enter voltage be such as the sine wave at 50Hz (depending on supply frequency) place, so being transferred into
The electric current of capacitor C will change from zero to twice meansigma methods with twice incoming frequency or 100Hz.Electricity
The size of container C must be configured to bear 100Hz ripple current, and also allows at 100Hz
Voltage ripple the least.
Generally in single phase converter, determine input current by the voltage on regulation capacitor C
The bandwidth of demand and this regulation is relatively low (such as 5Hz) so that the ripple electricity occurred on capacitor
Press inconspicuous exogenous disturbances current needs (this can cause the power of input current distortion and reduction because of
Number).The power factor generally realized by PFC level is close to 1 (usually 0.98-0.99) and defeated
Enter current distortion below 5%.
The many that there is the power factor correction stage including the bridge rectifier before voltage-boosting stage may be real
The phase branch that existing, Bridgeless boost includes two voltage-boosting stages and two diodes, have two diodes is defeated
Enter, full-bridge inputs and other, the input current that all these realizations are proportional to input voltage, from
And show as resistor, thus provide PFC.
DCDC level subsequently includes isolating device and generally comprises the regulation with loop amplifier
Device with the output noise of the per unit ripple that output noise is reduced on C below.There is also bag
The many of the isolation DC-DC level including the phase-shifting full-bridge useful to high efficiency and LLC resonance may be real
Existing.
Fig. 2 show the input of three single-phase two-stage converters star (or Y shape) connect with
And output be connected in parallel.
Fig. 3 shows the present invention utilizing the circuit arrangement shown in Fig. 1 and Fig. 2 with ideal form
Preferred embodiment.It is modeled as PFC level extracting the defeated of the electric current proportional to input voltage AC in
Enter resistor Ri1, Ri2, Ri3, and under voltage VC1, VC2, VC3, electric current is sent to
Output current source I1, I2, I3 in capacitor C1, C2, C3, each output current source transmit with
The identical power of power that input resistor extracts.
Each input is set by input demand signal PFCdem1, PFCdem2, PFCdem3
The value of resistor Ri1, Ri2, Ri3, wherein, make input demand signal PFCdem1, PFCdem2,
PFCdem3 is equal, so input resistor has equal value.
DCDC level is modeled as from PFC level output extract the current sink Ii1 of power, Ii2,
Ii3 and power is sent to export current source Io1, Io2, Io3 of DC out, and by exporting
Demand signal DCDCdem1, DCDCdem2, DCDCdem3 determine the value of DC out.
Under condenser voltage VC1, VC2, VC3 by each DCDC input current absorber Ii1, Ii2,
The power that Ii3 extracts is equal under output voltage Vout by each output current source Io1, Io2, Io3
The power transmitted.
In order to control this layout, control average capacitor voltage by loop amplifier G7, at ring
It is averaged to form VCave to each condenser voltage Vc1, Vc2, Vc3 at the amplifier G7 of road
And compare with benchmark VCaveref, error signal is amplified by gain G 7 and by as equal
Input demand signal PFCdem1, PFCdem2, PFCdem3 equally send to control every
Individual PFC level.These equal input demand signals ensure that due to equal input resistance value
From equal power consumption and the stable punctate opacity of the cornea of each grade.According to this control, only control average
Condenser voltage VCave, so each capacitor can have the voltage different from meansigma methods.
Output voltage Vout is regulated, by measurement at loop amplifier G8 by loop amplifier G8
Output voltage Vout compares with benchmark Voutref, and is carried out fault in enlargement with shape by gain G 8
Become the shared output current needs being used as the output current needs for whole three DCDC levels
Ioutdem.Each output electric current is controlled by each output current loop amplifier G4, G5, G6,
Each output current loop amplifier G4, G5, G6 at by each output electric current Io1, Io2,
Io3 compares with sharing output current needs Ioutdem, and by gain G 4, G5, G6
Come fault in enlargement signal with formed output current demand signal DCDCdem1, DCDCdem2,
DCDCdem3。
Because output electric current is equal in this arrangement, so the power from each grade exports equal.But
Be the most additional control change these output electric currents with by by three error signals VCe1, VCe2,
VCe3 adds output electric current Io1, Io2, Io3 to regulate each condenser voltage.By each electricity
Condenser voltage loop amplifier G1, G2, G3 generate these capacitor voltage error signal VCe1,
VCe2, VCe3, wherein, each condenser voltage loop amplifier G1, G2, G3 will average electricity
Condenser voltage VCave compares, then by gain with each voltage VC1, VC2, VC3
G1, G2, G3 carry out fault in enlargement signal.Therefore, if any condenser voltage VC1, VC2,
VC3 is different from meansigma methods, then be modified repairing this voltage to output electric current.
By limiting the DC gain of each condenser voltage loop amplifier G1, G2, G3, three
It is zero that individual control signal (i.e. capacitor voltage error signal VCe1, VCe2, VCe3) has
Meansigma methods, even if so each output electric current may be greater than or less than by shared output current needs
Their meansigma methods set by Ioutdem, also can maintain average output current.By individually adjusting
Output electric current achieves the control to whole three condenser voltages.
Fig. 4 shows that of single-phase two-stage converter may topology.Ac input voltage AC in quilt
Diode bridge rectification, the most boosted processing of circuit, booster circuit is by boost inductor LB, boosting
Switch SWB and booster diode DB is constituted, and this booster circuit delivers power to storage capacitor
In device C.Make defeated by using pulse-width modulator (PWM) to control boosted switch SWB
Enter the size of electric current and be multiplied by demand signal PFCdem equal to the size of input voltage, this level show as
With the resistor of AC input, and achieve the power factor close to 1.
By switch SW1 and SW2, resonant element LR, CR1, CR2, and transformator Tx
Magnetizing inductance, and be connected to the secondary diode bridge composition isolation LLC of transformator Tx
DCDC level.By by similar 50% Duty ratio control switch inverse, and use frequency modulation(PFM)
Device (FM) carrys out change frequency, it is possible to use the characteristic of resonant network by demand signal DCDCdem
Realize output voltage and the control of electric current.
Fig. 5 shows three Single-phase PFC levels according to Fig. 2 combination so that its input star (or
Y shape) connect, and eliminate DCDC level for purposes of clarity, and Fig. 3 shows
Stablize the control circuit of punctate opacity of the cornea.The control circuit (such as, as shown in Figure 4) of each PFC
Ensure that extracted input current is multiplied by required value to input voltage proportional, thus formed apparent defeated
Enter resistance.By change demand, the input power of change will be extracted.
In single phase converter, change demand is to regulate single energy-storage capacitor voltage, but does not has here
Have and do like that.Each PFC level input demand signal PFCdem1, PFCdem2, PFCdem3
Identical, and controlled by single loop amplifier A7, loop amplifier A7 will as by R1,
The average capacitor voltage of the meansigma methods of three condenser voltages Vc1, Vc2, Vc3 of R2, R3
VCave control is made equal to benchmark VCaveref.
The reason using single control signal is to ensure that the demand of whole three circuit is identical,
So the apparent input resistance of whole three circuit is identical.Even if this is in the unbalanced situation of AC
Under also ensure that the stability of punctate opacity of the cornea.The closed-loop bandwidth of average capacitor voltage loop amplifier A7 is relatively
Low (such as 5Hz) so that the demand signal at its output during power frequency cycle substantially
Constant, thus allow low distortion and the high noise immunity to AC high line impedance, have single with typical case
The performance that phase control circuit is similar.
The gain of each PFC control circuit should mesh well in span of control (such as
+/-5%), to realize similar apparent input resistance value and equal AC input electricity for each level
Pressure.Any gain mismatch causes unequal AC voltage due to unequal apparent resistance, and
Though undesirably, this situation is stablized because apparent resistance is constant.
When controlling the average capacitor voltage VCave of whole three capacitors, each capacitor electricity
Pressure Vc1, Vc2, Vc3 can have a small amount of or substantial amounts of difference each other and still meet meansigma methods requirement.
This be not both less desirable and can be with causing trouble.So solving punctate opacity of the cornea stability but occurring
New problem.
With reference to Fig. 6, it is combined with three single phase converter according to Fig. 1, Fig. 2 and Fig. 5 so that they
Input Y-connection and their output-parallel connect.Together with isolation DC/DC control signal
Output electric current and the sensing points of voltage are shown, and figure 7 illustrates the electricity controlling DCDC level
Road.
With reference to Fig. 7, output voltage loop amplifier A8 by via R13 output voltage Vout with
Benchmark Voutref compares, and have high closed-loop bandwidth (such as 2kHz) with resist make an uproar
Sound the exactly output of regulation voltage.Its output is equally fed to each output current loop and is put
Shared output demand current Ioutdem of big device A4, A5, A6.As will be described below, by ring
Road amplifier A4, A5, A6 control each DCDC level, and this individually controls to make it possible to solve
Capacitor unbalance problem the most outlined above.
Each output current loop amplifier A4, A5, A6 are by the output via R4, R5, R6
Electric current Iout1, Iout2, Iout3 and the demand current from output voltage loop amplifier A8
Ioutdem compares, and regulates each DCDC level with high closed-loop bandwidth (such as 5kHz)
(false with any 100Hz ripple that the electric current required by realization suppression occur on energy-storage capacitor
If 50Hz line frequency).Manipulator Mod 1, Mod 2, Mod 3 are illustrated in isolation level
At the output of the loop amplifier before DCDCdem1, DCDCdem2, DCDCdem3, but
It is same after they can be placed on the isolation level with identical function.
Equal output electric current and equal output voltage is realized due to being connected in parallel of output
Result is equal output and equal defeated from three single phase converter therefore obtained
Enter power, therefore realize the equal of the power between transducer and share.But it is discussed further below the most not phase
Hope equal power.
Consider that the coupling of apparent input resistor of three transducers is defective or three output electric currents
The defective situation of sensing.Any situation all will cause energy-storage capacitor continuous loss or continue
Obtain energy, thus out of control to zero or the highest voltage, and the unlatching of protection circuit or transducer
It is likely to fault.Expect to regulate each condenser voltage so that this situation alleviates.
Consider the unbalanced situation of AC phase, in this case, a phase compared with other two phase voltage
Voltage is relatively low.PFC level may proceed to present to link together at punctate opacity of the cornea by three equal capacitance devices
AC input.Because input voltage is less, so the electric current being extracted in low phase can be less,
So the mean power extracted by the PFC level being connected to this phase can be less.
In order to realize balance, DCDC level must consume the mean power as PFC level, otherwise
Condenser voltage will stably decline or raise.Regulate each by change DCDC power consumption
Condenser voltage so that the power in each DCDC and the power match provided by PFC level.
Each condenser voltage loop amplifier A1, A2, A3 by change output electric current Iout1,
Iout2, Iout3 realize condenser voltage regulation.They each by via R10, R11, R12
Individual condenser voltage compares with average capacitor voltage VCave, and via loop amplifier
R7, R8, R9 at the input node of A4, A5, A6 by correction signal VCe1, VCe2,
VCe3 provide output electric current in each.
The closed-loop bandwidth of each condenser voltage loop amplifier A1, A2, A3 relatively low (such as
4Hz) so that the ripple occurred at the 100Hz on condenser voltage Vc1, Vc2, Vc3 is the most not
Occur in the output of condenser voltage loop amplifier A1, A2, A3, and exported by each
The DCDC level that current loop amplifier A4, A5, A6 control the most does not carries 100Hz ripple.
The DC gain of each condenser voltage loop amplifier A1, A2, A3 can be restricted to valuably
Be enough to realize the value (such as in 2%) of the acceptable match of condenser voltage, and have following
Benefit: avoid the amplitude limit (clipping) of these amplifiers A1, A2, A3, and capacitor error
The meansigma methods of voltage VCe1, VCe2, VCe3 is zero, therefore output voltage loop amplifier A8
Behavior the most do not regulated by condenser voltage and affect.
When use in a preferred embodiment of the invention control more than all time, punctate opacity of the cornea is stable, and
And input current enjoys the low distortion similar to single phase converter, control condenser voltage, DCDC
100Hz ripple in Ji is low, and in addition to mutually unbalanced situation, three transducers are balancedly altogether
With power, and export and enjoy the low noise similar with single phase converter.
Finally, although the preferred embodiments of the present invention are described in detail in this article, but ability
Skilled artisan will appreciate that of territory, other embodiments is possible, and such embodiment is wrapped
Include within the scope of the appended claims.Such as, as shown in Figure 7, can realize with hardware attached
Control circuit shown in figure, or can completely or partially realize with software.It is believed that
The software of control circuit realizes in the ability of complete those skilled in the art, the most in this article
Need not describe in detail.It is considered as such realization to be within the purview of the appended claims.
Claims (13)
1. the three-phase alternating current worked in the case of not having neutral point to connect is changed to direct current power
Device, including:
A) three Monophase electric power conversion modules, each Monophase electric power conversion module includes:
PFC (PFC) level, it is defeated by it that described power factor correction stage is configured to extraction
Enter voltage and be multiplied by controlled input demand signal and the input current that determines；
Energy-storage capacitor, described energy-storage capacitor is connected to the output of described power factor correction stage；With
And
DC to DC converter (DCDC) level, described DC to DC converter level is connected to institute
State energy-storage capacitor, and there is the output that can be output demand signal control,
Wherein, described three Monophase electric power conversion modules are in its input Y-connection and defeated at it
Source is connected in parallel；And
B) control circuit, described control circuit is used for determining that described input demand signal and output need
Seek signal so that in use:
By the equal input demand determined by the average voltage on three energy-storage capacitors of regulation
Signal controls whole three power factor correction stage together；And
Individually being controlled each DC to DC converter level by output demand signal, described output demand is believed
Number include:
Based on the total output electric current required for the load being connected to described three-phase power transducer
Share output demand current, and
Voltage on the relevant energy-storage capacitor of corresponding module is adjusted required correction
Amount.
Transducer the most according to claim 1, wherein, by (i) each storage capacitor relevant
Difference between each voltage on device and the described average voltage on (ii) described three energy-storage capacitors
Determine described correcting value.
Transducer the most according to claim 2, wherein, is controlled described three by loop amplifier
Described average voltage on individual energy-storage capacitor, to each condenser voltage at described loop amplifier
It is averaged and then compares with reference voltage.
Transducer the most according to claim 3, wherein, is put by each condenser voltage loop
Big device determines the described correcting value required for the regulation realizing described energy-storage capacitor, each electric capacity described
Described flat by each condenser voltage described and described three capacitors of device voltage loop amplifier
All voltage compares.
Transducer the most according to claim 4, wherein, each condenser voltage loop described
The closed-loop bandwidth of amplifier is of a sufficiently low so that occur in the ripple voltage on described condenser voltage in institute
State and substantially occur without at the described output of each condenser voltage loop amplifier.
Transducer the most according to claim 5, wherein, limits each condenser voltage described
The DC current gain of loop amplifier so that avoid the amplitude limit of these amplifiers.
7. according to the transducer described in any one in claim 1 to 7, wherein, by output electricity
Pressure loop amplifier determines described shared output demand current, and described output voltage loop amplifier is by institute
State three-phase alternating current to compare to the output voltage of direct current transducer with output reference voltage.
Transducer the most according to claim 7, wherein, described output voltage loop amplifier
There is high closed-loop bandwidth.
Transducer the most according to claim 7, wherein, described shared output demand current quilt
Equally being fed to each output current loop amplifier, each described output current loop amplifier will
The actual output current transmitted by described corresponding DC to DC converter level needs with described shared output
Electric current is asked to compare.
Transducer the most according to claim 9, wherein, each output current loop described is put
Big device regulates each DC to DC converter level with high closed-loop bandwidth.
11. according to the transducer described in any one in aforementioned claim, wherein, isolate each directly
Flow to direct current transducer level so that the output of each module inputs isolation with it.
12. 1 kinds of three-phase alternating currents controlling to work in the case of not having neutral point to connect are to unidirectional current
The method of force transducer, described transducer includes:
Three Monophase electric power conversion modules, each Monophase electric power conversion module includes:
PFC (PFC) level, it is defeated by it that described power factor correction stage is configured to extraction
Enter voltage and be multiplied by controlled input demand signal and the input current that determines；
Energy-storage capacitor, described energy-storage capacitor is connected to the output of described power factor correction stage；With
And
DC to DC converter (DCDC) level, described DC to DC converter level is connected to institute
State energy-storage capacitor, and there is the output that can be output demand signal control,
Wherein, described three Monophase electric power transducers are in its input Y-connection and at its output
It is connected in parallel, and
Said method comprising the steps of:
Measure the voltage on each energy-storage capacitor；
Determine the average capacitor voltage on three energy-storage capacitors；
Generate equal input demand signal to regulate described average capacitor voltage；
By applying described equal input demand signal to control whole three power factor schools together
Positive level；
Measure the electric current output of the described DC to DC converter level from each module；And
Output demand signal, described output demand signal is generated for each DC to DC converter level
Including:
Based on by be connected to described three-phase power transducer be supported on setting output voltage under institute
The total shared output demand current exporting electric current needed, and
Voltage on the relevant energy-storage capacitor of corresponding module is adjusted required correction
Amount；And
Each DC to DC converter level is controlled based on corresponding output demand signal.
13. methods according to claim 12, wherein, by (i) described three storage capacitors
The difference between each voltage on average voltage on device relevant energy-storage capacitor described to (ii) is come really
Fixed described correcting value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2015203405 | 2015-06-19 | ||
| AU2015203405A AU2015203405B2 (en) | 2015-06-19 | 2015-06-19 | Control of a three phase AC-DC power converter comprising three single phase modules |
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| CN106257816B CN106257816B (en) | 2020-02-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10153710B1 (en) | 2017-07-25 | 2018-12-11 | Delta Electronics, Inc. | Power supply and control method thereof |
| CN110011548A (en) * | 2018-01-05 | 2019-07-12 | 首利实业股份有限公司 | The improved efficiency method and its structure of LLC resonance converter |
| CN113302831A (en) * | 2019-01-28 | 2021-08-24 | 三菱电机株式会社 | Power conversion device |
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| WO2011147128A1 (en) * | 2010-05-25 | 2011-12-01 | 新能动力（北京）电气科技有限公司 | Converting device of electrical energy |
| EP2509209A2 (en) * | 2011-04-05 | 2012-10-10 | Hamilton Sundstrand Corporation | Active rectification output capacitor balancing |
| CN203674997U (en) * | 2012-11-30 | 2014-06-25 | 控制技术有限公司 | Rectifier circuit |
| CN104518656A (en) * | 2013-10-08 | 2015-04-15 | 中兴通讯股份有限公司 | Totem-pole bridgeless power factor correction soft switching control device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011147128A1 (en) * | 2010-05-25 | 2011-12-01 | 新能动力（北京）电气科技有限公司 | Converting device of electrical energy |
| EP2509209A2 (en) * | 2011-04-05 | 2012-10-10 | Hamilton Sundstrand Corporation | Active rectification output capacitor balancing |
| CN203674997U (en) * | 2012-11-30 | 2014-06-25 | 控制技术有限公司 | Rectifier circuit |
| CN104518656A (en) * | 2013-10-08 | 2015-04-15 | 中兴通讯股份有限公司 | Totem-pole bridgeless power factor correction soft switching control device and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10153710B1 (en) | 2017-07-25 | 2018-12-11 | Delta Electronics, Inc. | Power supply and control method thereof |
| CN110011548A (en) * | 2018-01-05 | 2019-07-12 | 首利实业股份有限公司 | The improved efficiency method and its structure of LLC resonance converter |
| CN113302831A (en) * | 2019-01-28 | 2021-08-24 | 三菱电机株式会社 | Power conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2015203405A1 (en) | 2017-01-12 |
| AU2015203405B2 (en) | 2018-03-08 |
| CN106257816B (en) | 2020-02-21 |
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