CN101741235B - Buck three-phase power factor corrector with controlled output voltage - Google Patents
Buck three-phase power factor corrector with controlled output voltage Download PDFInfo
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- CN101741235B CN101741235B CN2009102510440A CN200910251044A CN101741235B CN 101741235 B CN101741235 B CN 101741235B CN 2009102510440 A CN2009102510440 A CN 2009102510440A CN 200910251044 A CN200910251044 A CN 200910251044A CN 101741235 B CN101741235 B CN 101741235B
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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
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- 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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Abstract
The invention relates to a buck three-phase power factor corrector with a controlled output voltage. A generalized active electric power filter is introduced to a three-phase uncontrollable rectifying unit, and an output direct-current voltage feedback of the three-phase uncontrollable rectifying unit is introduced to the control of a three-phase voltage type inverter of which the energy can flow bidirectionally, so that the control of the output direct-current voltage of the three-phase uncontrollable rectifying unit is realized through amplitude phase control or dq axis component control (vector control), wherein the three-phase uncontrollable rectifying unit can be a 6 pulse uncontrolled rectifying unit, and also can be 12 or 18 pulse or other three-phase uncontrollable rectifying units; and any three-phase voltage type inverters of which the energy can flow bidirectionally can be applied to the buck three-phase power factor corrector, and the three-phase voltage type inverter only needs to process harmonic waves and part of reactive power. The buck three-phase power factor corrector has the advantages of superior inhibition performance of the harmonic waves, high efficiency and controlled buck and output voltage, and is particularly suitable for correcting aviation three-phase power factors in the future 'more electric aircrafts'.
Description
Technical field
The present invention relates to power factor correction technology, be specifically related to buck three-phase power factor corrector.
Background technology
The uncontrollable rectifier bridge of the three-phase that uses in the electric power system is the main source that produces harmonic wave.In order to suppress this rahmonic, the method that generally adopts mainly is three-phase activity coefficient adjustment (PFC) and three phase active electric power filtering (APF) at present.Three-phase PFC is a kind of active harmonic wave control scheme, and it administers harmonic pollution from the angle in harmonic carcellation source.Its structure mainly comprises: triphase single-switch structure, three Single-phase PFC structures, the two Boost structures of three-phase series/parallel, Vienna structure and three-phase two level and three-level PWM rectifier, and step-down Buck type etc.Wherein the triphase single-switch structure has obtained wider application at middle low power, but this scheme is operated in interrupted conduction mode, and its harmonic suppression effect is not ideal enough, and the power capacity of single construction of switch is restricted in addition; Three structures that Single-phase PFC is combined, this scenario-frame complexity, alternate degree of coupling height in three-phase three wire system, conduction loss is big, and efficient is low; The two Boost structures of three-phase series/parallel, Vienna and two level and three-level PWM rectifier, though can realize harmonic wave control performance preferably, but the HF switch in all structures all needs to handle whole bearing powers, on cost and efficient, do not have advantage, and this class circuit of power factor correction all adopts the Boost structure, belong to booster type, its output needs extra voltage-dropping type circuit and back level coupling, will increase system complexity; Though step-down Buck type structure can realize the function of output buck, owing to be operated in interrupted conduction mode, the harmonic wave control effect is undesirable, is difficult to realize high performance power factor correction.
Three phase active electric power filtering (APF) does not need to change the structure of original uncontrollable rectifier bridge voltage-dropping type, and the HF switch part only needs processing section power simultaneously, has higher efficient.But no matter be tandem type, parallel connection type or hybrid type, all need to realize harmonic wave control by detecting load harmonic voltage or electric current, voltage or electric current loop bandwidth to APF have proposed very high requirement, need higher switching frequency could realize harmonic wave control effect preferably, under existing power device level, be difficult to realize the harmonic compensation of superior performance.The broad sense Active Power Filter-APF of another report can be realized harmonic wave control effect preferably under lower switching frequency, but it is the same with the APF scheme of other structure, the rectifier bridge output dc voltage is uncontrollable, when fluctuation appears in supply voltage, will there be bigger fluctuation in dc voltage, and this uses in (for example " how electric aircraft ") and can not meet the demands at majority.
In sum, there is the harmonic wave control poor performance in existing three-phase power factor corrector, the not high and uncontrollable defective of output voltage of efficient.
Summary of the invention
The objective of the invention is, a kind of harmonic wave control better performances is provided, the higher and controlled buck three-phase power factor corrector of output voltage of efficient.
Technical scheme of the present invention is the controlled buck three-phase power factor corrector of a kind of like this output voltage, and its part same as the prior art is: this power factor corrector is made of main circuit, sample circuit and control circuit; But comprise inductance before low pass filter behind the uncontrollable rectification unit of three-phase voltage-type inverter, three-phase, the uncontrollable rectification unit of three-phase of energy two-way flow, three mains side inductance and three the uncontrollable rectification units of three-phase in its main circuit; Wherein, three mains side inductance correspondence respectively are serially connected in before three phase mains and three the uncontrollable rectification units of three-phase between the inductance, and the other end of inductance is connected to three ac input ends of the uncontrollable rectification unit of three-phase before these three uncontrollable rectification units of three-phase; Low pass filter is the second-order low-pass filter that is made of inductance and electric capacity behind the uncontrollable rectification unit of three-phase, perhaps the low-pass first order filter that only is made of an electric capacity.But the three-phase voltage-type inverter of energy two-way flow is made of three phase inverter bridge and the electric capacity that is connected in parallel on this three-phase inversion bridge DC side, but the interchange end correspondence of the three-phase voltage-type inverter of this energy two-way flow is attempted by the connected node place of three mains side inductance and three preceding inductance of the uncontrollable rectification unit of three-phase; But but sample circuit comprise be connected in parallel on this three-phase power input end with the voltage sensor unit of sampling three-phase input voltage, be connected in the three-phase power input end two-phase arbitrarily with two current sensors of the two-phase input current in the sampling three-phase input current, be connected in parallel on the DC side of three-phase voltage-type inverter of energy two-way flow with the voltage sensor I of the three-phase voltage-type inverter dc voltage of sampled energy two-way flow; The signal output part of voltage sensor unit, two current sensors and voltage sensor I is all corresponding to be connected on the link of control and calculation unit.Improvements of the present invention are, at the dc output end of the uncontrollable rectification unit of three-phase voltage sensor II in parallel with the uncontrollable rectification unit VD of this three-phase of sampling, the signal output part of this voltage sensor II also is connected on the link of control and calculation unit accordingly, to constitute control circuit.
In the controlled buck three-phase power factor corrector of output voltage after above-mentioned improvement, control and calculation unit in its control circuit is also improved in the lump, improvement structure by the computing of amplitude phase control or the improvement structure by dq axle component control computing are arranged respectively.
By in the structure of amplitude phase control computing, its control and calculation unit comprises switch drive generation unit I, adjuster I, adjuster II, subtracter I and subtracter II improved; Wherein, subtracter I receives the uncontrollable rectification unit VD of three-phase and the three-phase uncontrollable rectification unit direct current output reference voltage that is obtained by sample circuit and carries out subtraction, produces then and imports the uncontrollable rectification unit VD of three-phase error signal to adjuster I; But but the three-phase voltage-type inverter DC side reference voltage of the three-phase voltage-type inverter dc voltage that subtracter II receives the energy two-way flow that is obtained by sample circuit and energy two-way flow and carry out subtraction, but generation and to the three-phase voltage-type inverter dc voltage error signal of adjuster II intake two-way flow then; Adjuster I produces the input current phase reference signal after receiving the uncontrollable rectification unit VD of three-phase error signal, then this signal is given switch drive generation unit I; But after the dc voltage error signal of the three-phase voltage-type inverter of adjuster II received energy two-way flow, produce input current amplitude reference signal, then this signal is given switch drive generation unit I; Switch drive generation unit I receives any two input current signals and input voltage signal in the input current signal that is obtained by sample circuit simultaneously, switch drive generation unit I obtains in input current phase reference signal, input current amplitude reference signal, the input current signal behind any two input current signals and input voltage signal, but produces the drive signal of the three-phase voltage-type inverter that drives the energy two-way flow.
In improved structure by dq axle component control computing, its control and calculation unit comprises that switch drive generation unit II, adjuster III, adjuster IV, phase-locked loop, three phase static coordinate are tied to the converter unit I of two-phase rotating coordinate system, subtracter III and subtracter IV; Wherein, subtracter III receives the uncontrollable rectification unit VD of three-phase and the three-phase uncontrollable rectification unit direct current output reference voltage that is obtained by sample circuit and carries out subtraction, produces then and imports the uncontrollable rectification unit VD of three-phase error signal to adjuster III; But but the three-phase voltage-type inverter DC side reference voltage of the three-phase voltage-type inverter dc voltage that subtracter IV receives the energy two-way flow that is obtained by sample circuit and energy two-way flow and carry out subtraction, but generation and to the three-phase voltage-type inverter dc voltage error signal of adjuster IV intake two-way flow then; After adjuster III receives the uncontrollable rectification unit VD of three-phase error signal, produce input current quadrature axis component reference signal, then this signal is given switch drive generation unit II; But after the dc voltage error signal of the three-phase voltage-type inverter of adjuster IV received energy two-way flow, produce input current direct axis component reference signal, then this signal is given switch drive generation unit II; Phase-locked loop receives the input voltage signal that obtains from sample circuit, produces and characterize to the converter unit I input that the three phase static coordinate is tied to the two-phase rotating coordinate system sine and the cosine signal of input voltage frequency and phase place then; After the converter unit I that the three phase static coordinate is tied to the two-phase rotating coordinate system receives any two input current signals from the input current signal that sample circuit obtains at the same time, produce input current direct axis component and input current quadrature axis component, give switch drive generation unit II with input current direct axis component and input current quadrature axis component signal then; After switch drive generation unit II obtains input current quadrature axis component reference signal, input current direct axis component reference signal, input current direct axis component and input current quadrature axis component signal, but generation drives the drive signal of the three-phase voltage-type inverter of energy two-way flow.
From scheme as can be seen, the present invention with broad sense Active Power Filter-APF (being part same as the prior art) but be incorporated in the circuit of the present invention, and the VD of the uncontrollable rectification unit of three-phase fed back in the control of the three-phase voltage-type inverter that is incorporated into the energy two-way flow, so just solved the uncontrollable problem of output voltage.Superiority of the present invention is as follows:
1. high-performance.Under identical switching frequency condition, harmonic wave rejection of the present invention is similar to existing Three-Phase PWM Rectifier, and is better than schemes such as three phase active electric power filter.
2. high efficiency.But the three-phase voltage-type inverter of energy two-way flow only need be handled harmonic wave and part reactive power, has reduced the capacity of inverter effectively, can reduce installed capacity, raises the efficiency.
3. voltage-dropping type.Realize step-down by the uncontrollable rectification unit of three-phase, can obtain being lower than the decompression DC bus of input ac power voltage magnitude.
4. VD is controlled.Under AC side mains fluctuations condition, still can keep the stable of VD preferably.
In brief, the present invention is a kind of harmonic wave control better performances, the higher and controlled buck three-phase power factor corrector of output voltage of efficient; It is particularly useful for the aviation three-phase activity coefficient adjustment in future " how electric aircraft ".
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1---circuit structure diagram of the present invention
Fig. 2 a---amplitude phase control block diagram of the present invention
Fig. 2 b---dq axle component controlling party block diagram of the present invention
Fig. 3 a---A phase input voltage, current waveform figure when input voltage 400Hz, 115V
Fig. 3 b---VD oscillogram when input voltage 400Hz, 115V
Fig. 4 a---A phase input voltage, current waveform figure when input voltage 400Hz, 100V
Fig. 4 b---VD oscillogram when input voltage 400Hz, 100V
Fig. 5 a---A phase input voltage, current waveform figure when input voltage 400Hz, 122V
Fig. 5 b---VD oscillogram when input voltage 400Hz, 122V
Fig. 6 a---A phase input voltage, current waveform figure when input voltage 50Hz, 220V
Fig. 6 b---VD oscillogram when input voltage 50Hz, 220V
Embodiment
The present invention has two schemes with identical specified features.For saving space, at first the concrete structure that wherein relates to the controlled buck three-phase power factor corrector of output voltage itself is concentrated disclosure with the form of global schema; And then disclose respectively the control and calculation unit CONU in the global schema is carried out concrete improved different structure.For keeping necessary continuity, when disclosing the different structure of control and calculation unit CONU wherein, identical between the two specified features has not just been omitted.
Described global schema is as follows:
The buck three-phase power factor corrector (with reference to figure 1) that output voltage is controlled, this power factor corrector is made of main circuit, sample circuit and control circuit.But in main circuit, comprise low pass filter (L behind the uncontrollable rectification unit of three-phase voltage-type inverter, three-phase, the uncontrollable rectification unit of three-phase of energy two-way flow
1, C
1), three mains side inductance (L
Sa, L
Sb, L
Sc) and three preceding inductance (L of the uncontrollable rectification unit of three-phase
Da, L
Db, L
Dc); Wherein, three mains side inductance (L
Sa, L
Sb, L
Sc) respectively correspondence be serially connected in inductance (L before three phase mains and three the uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) between, inductance (L before these three uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) the other end be connected to three ac input ends of the uncontrollable rectification unit of three-phase; Low pass filter is by inductance L behind the uncontrollable rectification unit of three-phase
1And capacitor C
1The second-order low-pass filter that constitutes is perhaps only by a capacitor C
1Back level dc bus after the low-pass first order filter that constitutes---this low pass filter is the output of the controlled buck three-phase power factor corrector of output voltage of the present invention, and (what drawn out among Fig. 1 is " by inductance L
1With filter capacitor C
1The second-order low-pass filter that constitutes ", remove inductance L wherein
1After be " low-pass first order filter ", therefore, the latter draws separately.In addition, reaching under the prerequisite of the object of the invention, also can replace above-mentioned second-order low-pass filter or low-pass first order filter with other forms of low pass filter.R among Fig. 1
LBe to connect load equivalent resistance after the output of this invention).But the three-phase voltage-type inverter of energy two-way flow is by three phase inverter bridge BDPIB and the capacitor C that is connected in parallel on this three phase inverter bridge BDPIB DC side
2Constitute, but the interchange end correspondence of the three-phase voltage-type inverter of this energy two-way flow is attempted by three mains side inductance (L
Sa, L
Sb, L
Sc) and three preceding inductance (L of the uncontrollable rectification unit of three-phase
Da, L
Db, L
Dc) the connected node place.Sample circuit comprises and is connected in parallel on this three-phase power input end with sampling three-phase input voltage (v
a, v
b, v
c) voltage sensor unit VT, be connected in the three-phase power input end arbitrarily two-phase with sampling three-phase input current (i
a, i
b, i
c) in the two-phase input current (that marked among Fig. 1, Fig. 2 a and Fig. 2 b is i in them
aAnd i
b) two current sensor (CT
1, CT
2) (illustrate: can calculate three-phase input current (i according to the two-phase input current wherein of the Kirchhoff's current law (KCL) collection in the circuit theory
a, i
b, i
c), therefore adopt three-phase current sensor directly to survey three-phase input current here and also be fine) but but, be connected in parallel on the DC side of three-phase voltage-type inverter of energy two-way flow with the three-phase voltage-type inverter dc voltage v of sampled energy two-way flow
DcVoltage sensor I VT
1Voltage sensor unit VT, two current sensor (CT
1, CT
2) and voltage sensor I VT
1The equal correspondence of signal output part be connected on the link of control and calculation unit CONU; In the present invention, at the uncontrollable rectification unit dc output end of three-phase voltage sensor II VT in parallel
2With the uncontrollable rectification unit VD of this three-phase v that samples
Out, this voltage sensor II VT
2Signal output part also is connected on the link of control and calculation unit CONU accordingly, to constitute control circuit---also be control and calculation unit CONU, according to the signal of sample circuit input, but but carry out work (the specific implementation method back of above-mentioned control circuit can 2 be described in detail in conjunction with the accompanying drawings) by the three-phase voltage-type inverter that the drive signal that corresponding amplitude phase control or dq axle component control computing obtain the three-phase voltage-type inverter of energy two-way flow drives the energy two-way flow.
The different structure of control and calculation unit CONU is as follows in the global schema.
One, pass through the improvement structure (with reference to figure 2a) of amplitude phase control computing:
In above-mentioned global schema, control and calculation unit CONU comprises switch drive generation unit I GDU I, adjuster I, adjuster II, subtracter I S
1With subtracter II S
2Wherein, subtracter I S
1The uncontrollable rectification unit VD of the three-phase v that reception is obtained by sample circuit
OutWith the uncontrollable rectification unit direct current of three-phase output reference voltage v
Out_refAnd carry out subtraction, produce then and to the uncontrollable rectification unit VD of adjuster I input three-phase error signal Δ v
OutSubtracter II S
2But the three-phase voltage-type inverter dc voltage v of the energy two-way flow that reception is obtained by sample circuit
DcBut three-phase voltage-type inverter DC side reference voltage v with the energy two-way flow
Dc_refAnd carry out subtraction, but produce then and to the three-phase voltage-type inverter dc voltage error signal Δ v of adjuster II intake two-way flow
DcAdjuster I receives the uncontrollable rectification unit VD of three-phase error signal Δ v
OutAfter, produce input current phase reference signal θ
*, then this signal is given switch drive generation unit I GDU I; But the dc voltage error signal Δ v of the three-phase voltage-type inverter of adjuster II received energy two-way flow
DcAfter, produce input current amplitude reference signal I
s *, then this signal is given switch drive generation unit I GDU I; Switch drive generation unit I GDU I receives the input current signal (i that is obtained by sample circuit simultaneously
a, i
b, i
c) in any two input current signals and input voltage signal (v
a, v
b, v
c), switch drive generation unit I GDU I obtains input current phase reference signal θ
*, input current amplitude reference signal I
s *, input current signal (i
a, i
b, i
c) in any two input current signals and input voltage signal (v
a, v
b, v
c) after, but generation drives the drive signal (S of the three-phase voltage-type inverter of energy two-way flow
1, S
2S
n).
Two, the improvement structure by dq axle component control computing (with reference to figure 2b, dotted lines partly except):
In above-mentioned global schema, control and calculation unit CONU comprises that switch drive generation unit II GDU II, adjuster III, adjuster IV, phase-locked loop pll, three phase static coordinate are tied to the converter unit I (C of two-phase rotating coordinate system
3s/2rI), subtracter IIIS
3With subtracter IVS
4Wherein, subtracter IIIS
3The uncontrollable rectification unit VD of the three-phase v that reception is obtained by sample circuit
OutWith the uncontrollable rectification unit direct current of three-phase output reference voltage v
Out_refAnd carry out subtraction, produce then and to the uncontrollable rectification unit VD of adjuster III input three-phase error signal Δ v
OutSubtracter IVS
4But the three-phase voltage-type inverter dc voltage v of the energy two-way flow that reception is obtained by sample circuit
DcBut three-phase voltage-type inverter DC side reference voltage v with the energy two-way flow
Dc_refAnd carry out subtraction, but produce then and to the three-phase voltage-type inverter dc voltage error signal Δ v of adjuster IV intake two-way flow
DcAdjuster III receives the uncontrollable rectification unit VD of three-phase error signal Δ v
OutAfter, produce input current quadrature axis component reference signal I
q *, then this signal is given switch drive generation unit II GDU II; But the dc voltage error signal Δ v of the three-phase voltage-type inverter of adjuster IV received energy two-way flow
DcAfter, produce input current direct axis component reference signal I
d *, then this signal is given switch drive generation unit II GDU II; Phase-locked loop pll receives the input voltage signal (v that obtains from sample circuit
a, v
b, v
c), produce and be tied to the converter unit I (C of two-phase rotating coordinate system then to the three phase static coordinate
3s/2rI) input characterizes the sine and the cosine signal (sin ω t, cos ω t) of input voltage frequency and phase place; The three phase static coordinate is tied to the converter unit I (C of two-phase rotating coordinate system
3s/2rI) receive the input current signal (i that obtains from sample circuit at the same time
a, i
b, i
c) in any two input current signals after, produce input current direct axis component i
dWith input current quadrature axis component i
q, then with input current direct axis component i
dWith input current quadrature axis component i
qSignal is given switch drive generation unit II GDU II; Switch drive generation unit II GDU II obtains input current quadrature axis component reference signal I
q *, input current direct axis component reference signal I
d *, input current direct axis component i
dWith input current quadrature axis component i
qBehind the signal, but generation drives the drive signal (S of the three-phase voltage-type inverter of energy two-way flow
1, S
2S
n).
Further, control in the improvement structure of computing (with reference to figure 2b at the above-mentioned dq axle component that passes through, especially dotted lines part), dotted portion is input voltage feed forward and introduces part, by introducing electric voltage feed forward, to realize the decoupling zero control of input current direct axis component and quadrature axis component, can obtain better dynamic property.In control and calculation unit CONU, also have the three phase static coordinate to be tied to the converter unit II (C of two-phase rotating coordinate system
3s/2rII); Phase-locked loop pll receives the input voltage signal (v that obtains from sample circuit
a, v
b, v
c) after, the while is tied to the converter unit II (C of two-phase rotating coordinate system to this three phase static coordinate
3s/2rII) input characterizes the sine and the cosine signal (sin ω t, cos ω t) of input voltage frequency and phase place; This three phase static coordinate is tied to the converter unit II (C of two-phase rotating coordinate system
3s/2rII) receive the input voltage signal (v that obtains from sample circuit at the same time
a, v
b, v
c) after, produce input voltage direct axis component v
dWith input voltage quadrature axis component v
q, then this signal is given switch drive generation unit II GDU II.
In above-mentioned embodiment, the uncontrollable rectification unit of its three-phase is by six diode (D
1～D
6) the uncontrollable rectifier bridge (Fig. 1 draws according to this) formed.Certainly, the uncontrollable rectification unit of the three-phase among the present invention can also be 12 pulse waves or 18 pulse waves and the uncontrollable rectification unit of other three-phase.Wherein, the uncontrollable rectification unit structure of being made up of 6 diodes of 6 pulse wave three-phases is the simplest, most economical.
The present invention has passed through the checking of l-G simulation test, below in conjunction with simulation result operating characteristic of the present invention is described.At specified input voltage is 115V, and DC bus-bar voltage is the aviation power system of 270V, will get off to illustrate that the present invention has harmonic wave rejection and buck functionality preferably from different input voltage situations below, simultaneously can stable DC voltage 270V output.Fig. 3 a is input voltage 400Hz, A phase input voltage, current waveform during 115V, A phase input voltage, current waveform when Fig. 4 a is input voltage 400Hz, 110V, A phase input voltage, current waveform when Fig. 5 a is input voltage 400Hz, 122V, current waveform can be reached a conclusion under the more different input voltage conditions: the present invention has harmonic wave rejection preferably; Fig. 3 b is input voltage 400Hz, the uncontrollable rectification unit VD of three-phase waveform during 115V, Fig. 4 b is input voltage 400Hz, the uncontrollable rectification unit VD of three-phase waveform during 110V, Fig. 5 b is input voltage 400Hz, the uncontrollable rectification unit VD of three-phase waveform during 122V, the waveform of the uncontrollable rectification unit VD of three-phase can be reached a conclusion under the more different input voltage conditions: the present invention can realize the step-down output function, under the input voltage fluctuation condition, the present invention can control VD and stabilize to set point 270V simultaneously.
In the 50Hz industrial power system, the controlled buck three-phase power factor corrector of output voltage of the present invention has harmonic wave rejection and the controlled buck functionality of output voltage preferably equally.With typical 220V, 50Hz industrial power system is example, and setting the uncontrollable rectification unit VD of three-phase is 515V.A phase input voltage, current waveform when Fig. 6 a is input voltage 50Hz, 220V, the uncontrollable rectification unit VD of three-phase waveform when Fig. 6 b is input voltage 50Hz, 220V.It can be said that bright: this invention is applied among the industrial 50Hz power-supply system three-phase PFC, it has harmonic wave rejection preferably equally, can realize buck functionality, under the input voltage fluctuation condition, can stablize the uncontrollable rectification unit VD of three-phase simultaneously.
Claims (4)
1. the controlled buck three-phase power factor corrector of output voltage, this power factor corrector is made of main circuit, sample circuit and control circuit; But comprise inductance before low pass filter behind the uncontrollable rectification unit of three-phase voltage-type inverter, three-phase, the uncontrollable rectification unit of three-phase of energy two-way flow, three mains side inductance and three the uncontrollable rectification units of three-phase in the described main circuit; Wherein, three mains side inductance (L
Sa, L
Sb, L
Sc) respectively correspondence be serially connected in inductance (L before three phase mains and three the uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) between, inductance (L before these three uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) the other end be connected to three ac input ends of the uncontrollable rectification unit of described three-phase; Low pass filter is by inductance (L behind the uncontrollable rectification unit of described three-phase
1) and electric capacity (C
1) second-order low-pass filter that constitutes, perhaps only by an electric capacity (C
1) low-pass first order filter that constitutes; But the three-phase voltage-type inverter of described energy two-way flow is by three phase inverter bridge (BDPIB) and be connected in parallel on the electric capacity (C of this three phase inverter bridge (BDPIB) DC side
2) constitute, but the interchange end correspondence of the three-phase voltage-type inverter of this energy two-way flow is attempted by three mains side inductance (L
Sa, L
Sb, L
Sc) and three preceding inductance (L of the uncontrollable rectification unit of three-phase
Da, L
Db, L
Dc) the connected node place; Described sample circuit comprises and is connected in parallel on this three-phase power input end with sampling three-phase input voltage (v
a, v
b, v
c) voltage sensor unit (VT), be connected in the three-phase power input end arbitrarily two-phase with sampling three-phase output current (i
a, i
b, i
c) in two current sensor (CT of two-phase input current
1, CT
2But) but, be connected in parallel on the DC side of three-phase voltage-type inverter of energy two-way flow with the three-phase voltage-type inverter dc voltage (v of sampled energy two-way flow
Dc) voltage sensor I (VT
1); Described voltage sensor unit (VT), two current sensor (CT
1, CT
2) and voltage sensor I (VT
1) signal output part all correspondence be connected on the link of control and calculation unit (CONU); The invention is characterized in, at the dc output end of the uncontrollable rectification unit of described three-phase voltage sensor II (VT in parallel
2) with the VD (v of the uncontrollable rectification unit of this three-phase of sampling
Out), this voltage sensor II (VT
2) signal output part also be connected accordingly on the link of described control and calculation unit (CONU), to constitute described control circuit;
Described control and calculation unit (CONU) comprises switch drive generation unit I (GDU I), adjuster I, adjuster II, subtracter I (S
1) and subtracter II (S
2); Wherein, described subtracter I (S
1) receive the uncontrollable rectification unit VD of the three-phase (v that obtains by described sample circuit
Out) and the uncontrollable rectification unit direct current of three-phase output reference voltage (v
Out_ref) and carry out subtraction, produce then and to the uncontrollable rectification unit VD of described adjuster I input three-phase error signal (Δ v
Out); Described subtracter II (S
2But) receive the three-phase voltage-type inverter dc voltage (v of the energy two-way flow that obtains by described sample circuit
DcBut) with the three-phase voltage-type inverter DC side reference voltage (v of energy two-way flow
Dc_ref) and carry out subtraction, but produce then and to three-phase voltage-type inverter dc voltage error signal (the Δ v of described adjuster II intake two-way flow
Dc); Described adjuster I receives the uncontrollable rectification unit VD of described three-phase error signal (Δ v
Out) after, produce input current phase reference signal (θ
*), then this signal is given described switch drive generation unit I (GDU I); But described adjuster II receives dc voltage error signal (the Δ v of the three-phase voltage-type inverter of described energy two-way flow
Dc) after, produce input current amplitude reference signal (I
s *), then this signal is given described switch drive generation unit I (GDU I); Described switch drive generation unit I (GDU I) receives the input current signal (i that is obtained by sample circuit simultaneously
a, i
b, i
c) in any two input current signals and input voltage signal (v
a, v
b, v
c), described switch drive generation unit I (GDU I) obtains input current phase reference signal (θ
*), input current amplitude reference signal (I
s *), input current signal (i
a, i
b, i
c) in any two input current signals and input voltage signal (v
a, v
b, v
c) after, but generation drives the drive signal (S of the three-phase voltage-type inverter of described energy two-way flow
1, S
2S
n).
2. the controlled buck three-phase power factor corrector of output voltage, this power factor corrector is made of main circuit, sample circuit and control circuit; But comprise inductance before low pass filter behind the uncontrollable rectification unit of three-phase voltage-type inverter, three-phase, the uncontrollable rectification unit of three-phase of energy two-way flow, three mains side inductance and three the uncontrollable rectification units of three-phase in the described main circuit; Wherein, three mains side inductance (L
Sa, L
Sb, L
Sc) respectively correspondence be serially connected in inductance (L before three phase mains and three the uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) between, inductance (L before these three uncontrollable rectification units of three-phase
Da, L
Db, L
Dc) the other end be connected to three ac input ends of the uncontrollable rectification unit of described three-phase; Low pass filter is by inductance (L behind the uncontrollable rectification unit of described three-phase
1) and electric capacity (C
1) second-order low-pass filter that constitutes, perhaps only by an electric capacity (C
1) low-pass first order filter that constitutes; But the three-phase voltage-type inverter of described energy two-way flow is by three phase inverter bridge (BDPIB) and be connected in parallel on the electric capacity (C of this three phase inverter bridge (BDPIB) DC side
2) constitute, but the interchange end correspondence of the three-phase voltage-type inverter of this energy two-way flow is attempted by three mains side inductance (L
Sa, L
Sb, L
Sc) and three preceding inductance (L of the uncontrollable rectification unit of three-phase
Da, L
Db, L
Dc) the connected node place; Described sample circuit comprises and is connected in parallel on this three-phase power input end with sampling three-phase input voltage (v
a, v
b, v
c) voltage sensor unit (VT), be connected in the three-phase power input end arbitrarily two-phase with sampling three-phase output current (i
a, i
b, i
c) in two current sensor (CT of two-phase input current
1, CT
2But) but, be connected in parallel on the DC side of three-phase voltage-type inverter of energy two-way flow with the three-phase voltage-type inverter dc voltage (v of sampled energy two-way flow
Dc) voltage sensor I (VT
1); Described voltage sensor unit (VT), two current sensor (CT
1, CT
2) and voltage sensor I (VT
1) signal output part all correspondence be connected on the link of control and calculation unit (CONU); The invention is characterized in, at the dc output end of the uncontrollable rectification unit of described three-phase voltage sensor II (VT in parallel
2) with the VD (v of the uncontrollable rectification unit of this three-phase of sampling
Out), this voltage sensor II (VT
2) signal output part also be connected accordingly on the link of described control and calculation unit (CONU), to constitute described control circuit;
Described control and calculation unit (CONU) comprises that switch drive generation unit II (GDUII), adjuster III, adjuster IV, phase-locked loop (PLL), three phase static coordinate are tied to the converter unit I (C of two-phase rotating coordinate system
3s/2rI), subtracter III (S
3) and subtracter IV (S
4); Wherein, described subtracter III (S
3) receive the uncontrollable rectification unit VD of the three-phase (v that obtains by described sample circuit
Out) and the uncontrollable rectification unit direct current of three-phase output reference voltage (v
Out_ref) and carry out subtraction, produce then and to the uncontrollable rectification unit VD of described adjuster III input three-phase error signal (Δ v
Out); Described subtracter IV (S
4But) receive the three-phase voltage-type inverter dc voltage (v of the energy two-way flow that obtains by described sample circuit
DcBut) with the three-phase voltage-type inverter DC side reference voltage (v of energy two-way flow
Dc_ref) and carry out subtraction, but produce then and to three-phase voltage-type inverter dc voltage error signal (the Δ v of described adjuster IV intake two-way flow
Dc); Described adjuster III receives the uncontrollable rectification unit VD of described three-phase error signal (Δ v
Out) after, produce input current quadrature axis component reference signal (I
q *), then this signal is given described switch drive generation unit II (GDUII); But described adjuster IV receives dc voltage error signal (the Δ v of the three-phase voltage-type inverter of described energy two-way flow
Dc) after, produce input current direct axis component reference signal (I
d *), then this signal is given described switch drive generation unit II (GDUII); Described phase-locked loop (PLL) receives the input voltage signal (v that obtains from described sample circuit
a, v
b, v
c), produce and be tied to the converter unit I (C of two-phase rotating coordinate system then to described three phase static coordinate
3s/2rI) input characterizes the sine and the cosine signal (sin ω t, cos ω t) of input voltage frequency and phase place; Described three phase static coordinate is tied to the converter unit I (C of two-phase rotating coordinate system
3s/2rI) receive the input current signal (i that obtains from sample circuit at the same time
a, i
b, i
c) in any two input current signals after, produce input current direct axis component (i
d) and input current quadrature axis component (i
q), then with input current direct axis component (i
d) and input current quadrature axis component (i
q) signal gives described switch drive generation unit II (GDUII); Described switch drive generation unit II (GDU II) obtains input current quadrature axis component reference signal (I
q *), input current direct axis component reference signal (I
d *), input current direct axis component (i
d) and input current quadrature axis component (i
q) behind the signal, but the drive signal (S of the three-phase voltage-type inverter that drives described energy two-way flow produced
1, S
2S
n).
3. according to the controlled buck three-phase power factor corrector of the described output voltage of claim 2, it is characterized in that in described control and calculation unit (CONU), also having the three phase static coordinate to be tied to the converter unit II (C of two-phase rotating coordinate system
3s/2rII); Described phase-locked loop (PLL) receives and obtains input voltage signal (v from described sample circuit
a, v
b, v
c) after, the while is tied to the converter unit II (C of two-phase rotating coordinate system to this three phase static coordinate
3s/2rII) input characterizes the sine and the cosine signal (sin ω t, cos ω t) of input voltage frequency and phase place; This three phase static coordinate is tied to the converter unit II (C of two-phase rotating coordinate system
3s/2rII) receive the input voltage signal (v that obtains from sample circuit at the same time
a, v
b, v
c) behind the signal, produce input voltage direct axis component (v
d) and input voltage quadrature axis component (v
q), then this signal is given described switch drive generation unit II (GDU II).
4. according to claim 1, the controlled buck three-phase power factor corrector of 2 or 3 described output voltages, it is characterized in that the uncontrollable rectification unit of described three-phase is by six diode (D
1～D
6) the uncontrollable rectification unit of 6 pulse waves formed, or 12 pulse waves or 18 pulse waves or 24 pulse waves or the uncontrollable rectification unit of 36 pulse wave three-phases.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102510440A CN101741235B (en) | 2009-12-29 | 2009-12-29 | Buck three-phase power factor corrector with controlled output voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102510440A CN101741235B (en) | 2009-12-29 | 2009-12-29 | Buck three-phase power factor corrector with controlled output voltage |
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| Publication Number | Publication Date |
|---|---|
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| CN101741235B true CN101741235B (en) | 2011-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101174819B1 (en) * | 2012-01-12 | 2012-08-23 | 주식회사 애니홈스 | A electrical energy saver with improved power quality and the saving method thereof |
| CN103378600A (en) * | 2012-04-24 | 2013-10-30 | 张佩佩 | Three-phase power factor correcting circuit and power factor improving method thereof |
| CN104426376B (en) * | 2013-09-02 | 2017-04-12 | 康舒科技股份有限公司 | Switching mode power supply provided with resonant converter and control method thereof |
| CN105790605A (en) * | 2014-12-19 | 2016-07-20 | 力博特公司 | Rectifier assembly and uninterruptible power supply device with rectifier assembly |
| CN104836461A (en) * | 2015-03-20 | 2015-08-12 | 南京理工大学 | Intermittent boost converter controlled by switching period optimum utilization rate |
| CN104836463B (en) | 2015-04-30 | 2018-01-05 | 华南理工大学 | Mixing transformation system based on three-phase PWM rectification Yu multiple-unit uncontrollable rectifier |
| CN111711353B (en) * | 2020-06-17 | 2023-06-20 | 中国国家铁路集团有限公司 | Reactive component detection method, control method and device of single-phase rectifier |
| CN114552988B (en) * | 2022-03-02 | 2023-04-28 | 电子科技大学 | Soft start method of Buck type power factor correction circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6026006A (en) * | 1998-09-21 | 2000-02-15 | Lucent Technologies Inc. | Integrated three-phase power converter and method of operation thereof |
| CN1540848A (en) * | 2003-04-22 | 2004-10-27 | 深圳市中兴通讯股份有限公司南京分公 | Circuit providing output in three electrical levels for correcting two-phase power factor |
| CN101257250A (en) * | 2008-04-16 | 2008-09-03 | 哈尔滨工业大学 | Transformer primary voltage nip bit three phase single-stage bridge type power factor correcting converter |
-
2009
- 2009-12-29 CN CN2009102510440A patent/CN101741235B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6026006A (en) * | 1998-09-21 | 2000-02-15 | Lucent Technologies Inc. | Integrated three-phase power converter and method of operation thereof |
| CN1540848A (en) * | 2003-04-22 | 2004-10-27 | 深圳市中兴通讯股份有限公司南京分公 | Circuit providing output in three electrical levels for correcting two-phase power factor |
| CN101257250A (en) * | 2008-04-16 | 2008-09-03 | 哈尔滨工业大学 | Transformer primary voltage nip bit three phase single-stage bridge type power factor correcting converter |
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