CN104638952B - Three-phase power supply rectifier, control method thereof and three-phase power supply frequency converter - Google Patents
Three-phase power supply rectifier, control method thereof and three-phase power supply frequency converter Download PDFInfo
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- CN104638952B CN104638952B CN201310567812.XA CN201310567812A CN104638952B CN 104638952 B CN104638952 B CN 104638952B CN 201310567812 A CN201310567812 A CN 201310567812A CN 104638952 B CN104638952 B CN 104638952B
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- 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
- H02M7/2173—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 biphase or polyphase circuit arrangement
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Abstract
The invention discloses a three-phase power supply rectifier, a control method thereof and a three-phase power supply frequency converter. Wherein, three-phase power rectifier includes: the current sampling circuit is connected with the three-phase power supply and is used for sampling phase current of the three-phase power supply; the voltage sampling circuit is connected with the three-phase power supply and is used for sampling the line voltage of the three-phase power supply; the processor comprises a current input end, a voltage input end and a signal output end, wherein the current input end is connected with the current sampling circuit, and the voltage input end is connected with the voltage sampling circuit; the three-phase PWM rectifying circuit is respectively connected with a three-phase power supply and a signal output end; and the capacitor bank is connected with the three-phase PWM rectifying circuit. According to the invention, the effect of improving the power factor of the three-phase power supply rectifier is achieved.
Description
Technical field
The present invention relates to three phase mains field, in particular to a kind of three phase mains rectifier and its control method and
Three phase mains frequency converter.
Background technology
Currently, three-phase Passive Power factor correction（Power Factor Correction, referred to as PFC）It is applied to
In three phase mains harmonic management.The main special parameter L- in parallel or in series in each phase of three phase mains R, S, T of the passive PFC of three-phase
C circuit modes handle three phase mains harmonic problem.The special parameter L-C in parallel or in series in each phase of three phase mains R, S, T
Circuit mode so that the current phase offset of each phase current, to make electric current and voltage in phase, to improve power factor.On
The shortcomings that stating to three phase mains harmonic management is big for the inductance volume of L-C circuits, and parameter is determined by load, once it is determined that, very
Hardly possible modification, and power factor is relatively low, part times harmonic is more difficult to be passed through.
For the low problem of three phase mains rectifier power factor in the prior art, effective solution side is not yet proposed at present
Case.
Invention content
The main purpose of the present invention is to provide a kind of three phase mains rectifier and its control method and three phase mains frequency conversions
Device, to solve the problems, such as that three phase mains rectifier power factor is low.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of three phase mains rectifier.According to this
The three phase mains rectifier of invention includes：Current sampling circuit is connected with three phase mains, the phase electricity for sampling three-phase power supply
Stream；Voltage sampling circuit is connected with three phase mains, is used for the line voltage of sampling three-phase power supply；Processor, including electric current input
End, voltage input end and signal output end, current input terminal are connected with current sampling circuit, voltage input end and voltage sample
Circuit is connected；Three-phase PWM rectification circuit, is respectively connected with three phase mains and signal output end；And capacitance group, with three-phase
PWM rectification circuits are connected.
Further, three phase mains includes：R phases, S phases and T-phase, wherein voltage sampling circuit includes：First voltage samples
The incoming end of sub-circuit, first voltage sampling sub-circuit is connected with three phase mains, and first voltage samples the output end of sub-circuit
Be connected with voltage input end, first voltage sample sub-circuit for sample the first line voltage, the first line voltage be R phases, S phases and
Line voltage in T-phase between arbitrary two-phase；And second voltage sample sub-circuit, second voltage sample sub-circuit incoming end with
Three phase mains is connected, and the output end of second voltage sampling sub-circuit is connected with voltage input end, second voltage sampling son electricity
Road is the line voltage between arbitrary two-phase in R phases, S phases and T-phase for sampling the second line voltage, the second line voltage, wherein second
Line voltage is different line voltages from the first line voltage.
Further, current sampling circuit includes：First current sample sub-circuit, the access of the first current sample sub-circuit
End is connected with three phase mains, and the output end of the first current sample sub-circuit is connected with current input terminal, the first current sample
Sub-circuit is the phase current of any phase in R phases, S phases and T-phase for sampling the first phase current, the first phase current；Second electric current is adopted
The incoming end of appearance circuit, the second current sample sub-circuit is connected with three phase mains, the output of the second current sample sub-circuit
End is connected with current input terminal, and the second current sample sub-circuit is R phases, S phases for sampling the second phase current, the second phase current
With the phase current of any phase in T-phase, wherein the second phase current and the first phase current are different phase currents.
Further, first voltage sampling sub-circuit includes the first operational amplifier OP1, the first operational amplifier OP1's
First input end is connected with any one phase in R phases, S phases and T-phase, the second input terminal and R phases, the S of the first operational amplifier OP1
Mutually it is connected with any phase in T-phase, wherein the first input end and the second input terminal and three-phase electricity of the first operational amplifier OP1
The phase that source is connected is different, and the output end of the first operational amplifier OP1 is connected with the voltage input end of processor, wherein the
The second input terminal of one operational amplifier OP1 is connected with the output end of the first operational amplifier OP1；Second voltage sampling son electricity
Road includes second operational amplifier OP2, the first input end of second operational amplifier OP2 and any phase phase in R phases, S phases and T-phase
Connection, the second input terminal of second operational amplifier OP2 are connected with any phase in R phases, S phases and T-phase, wherein the second operation
The first input end of amplifier OP2 and the second input terminal be connected from three phase mains it is mutually different, second operational amplifier OP2's
Two input terminals connect mutually being all different for three phase mains, second operational amplifier with two input terminals of the first operational amplifier OP1
The output end of OP2 is connected with the voltage input end of processor, wherein the second input terminal of second operational amplifier OP2 and
The output end of two operational amplifier OP2 is connected；And first operational amplifier OP1 first input end and the second operation amplifier
The first input end of device OP2 is respectively connected to reference voltage Verf.
Further, the first current sample sub-circuit includes：First current sensor is arranged in R phases, S phases and T-phase and appoints
In one phase；Resistance R9, the first end of resistance R9 are connected with the first current sensor；Resistance R10, the first end of resistance R10 with
The second end of resistance R9 is connected, the second end ground connection of resistance R10；Third operational amplifier OP3, third operational amplifier OP3
First input end be respectively connected with the second end of resistance R9 and the first end of resistance R10, the of third operational amplifier OP3
Two input terminals are connected with the output end of third operational amplifier OP3, the output end of third operational amplifier OP3 also with processor
Voltage input end be connected；Second current sample sub-circuit includes：Second current sensor is arranged in R phases, S phases and T-phase
In any phase different from the first current sensor；Resistance R11, the first end of resistance R11 are connected with the second current sensor；
The first end of resistance R12, resistance R12 are connected with the second end of resistance R11, the second end ground connection of resistance R12；4th operation is put
The difference phase of the first input end and the second end and resistance R12 first ends of resistance R11 of big device OP4, four-operational amplifier OP4
Connection, the second input terminal of four-operational amplifier OP4 and the output end of four-operational amplifier OP4 are connected, the 4th operation
The output end of amplifier OP4 is also connected with the voltage input end of processor.
Further, three phase mains rectifier further includes busbar voltage sample circuit, and busbar voltage sample circuit includes：Electricity
R13 is hindered, the first end of resistance R13 is connected with the anode of capacitance group；The first end of resistance R14, resistance R14 are with resistance R13's
Second end is connected, and the second end of resistance R14 is connected with the cathode of capacitance group, wherein the first end and processor of resistance R14
Voltage input end be connected.
Further, three-phase PWM rectification circuit is intelligent power module.
To achieve the goals above, according to another aspect of the present invention, a kind of three phase mains frequency converter is provided.According to this
The three phase mains frequency converter of invention includes：Inverter；And any one of above-mentioned three phase mains rectifier, three phase mains rectification
The both ends of the capacitance group of device are connected with inverter.
To achieve the goals above, according to another aspect of the present invention, a kind of control of three phase mains frequency converter is provided
Method.The control method of three phase mains frequency converter according to the present invention includes：Three phase mains rectifier includes：Current sample electricity
Road is connected with three phase mains, is used for the phase current of sampling three-phase power supply；Voltage sampling circuit is connected with three phase mains, uses
In the line voltage of sampling three-phase power supply；Processor, including current input terminal, voltage input end and signal output end, electric current input
End is connected with current sampling circuit, and voltage input end is connected with voltage sampling circuit；Three-phase PWM rectification circuit, with three-phase
Power supply and signal output end are respectively connected with；Capacitance group is connected with three-phase PWM rectification circuit；
Control method includes：The phase voltage of three phase mains is calculated by phase current and line voltage；By the phase of three phase mains
Electric current and phase voltage obtain the reference value of the phase voltage of three phase mains；And the reference value adjustments of the phase voltage according to three phase mains
The phase of phase current follows the phase of phase voltage.
Further, three phase mains includes：R phases, S phases and T-phase, wherein by current sampling circuit sampling phase current and
The line voltage of voltage sampling circuit sampling is calculated the phase voltage of three phase mains and includes：The first current sample sub-circuit is received to adopt
First phase current of sample, the first phase current are the phase current of any one of R phases, S phases and T-phase；Receive the second current sample electricity
Second phase current of road sampling, the second phase current are the phase current of any phase in R phases, S phases and T-phase, wherein the second phase current with
First phase current is out of phase phase current；Receive the first line voltage of first voltage sampling sub-circuit sampling, the first line voltage
For the phase voltage between arbitrary two-phase in R phases, S phases and T-phase；The second line voltage of second voltage sampling sub-circuit sampling is received,
Second line voltage is the phase voltage between arbitrary two-phase in R phases, S phases and T-phase, wherein the second line voltage is with the first line voltage
Different line voltages；Three phase mains is calculated by the first phase current, the second phase current, the first line voltage and the second line voltage
The phase voltage of phase current and three phase mains except first phase current, the second phase current.
Further, the phase of phase voltage is followed according to the phase of the reference value adjustments phase current of the phase voltage of three phase mains
Including：Using the reference value of the phase voltage of three phase mains as input signal；Input signal is modulated by SPWM, obtains arteries and veins
Rush bandwidth modulation signals；Calculate the duty ratio of pulse width modulating signal；Pulse width modulating signal control is sent out according to duty ratio
Three-phase PWM rectification circuit processed is to adjust the phase that the phase of phase current follows phase voltage.
Through the invention, include using three phase mains rectifier：Current sampling circuit is connected with three phase mains, is used for
The phase current of sampling three-phase power supply；Voltage sampling circuit is connected with three phase mains, is used for the line voltage of sampling three-phase power supply；
Processor, including current input terminal, voltage input end and signal output end, current input terminal are connected with current sampling circuit,
Voltage input end is connected with voltage sampling circuit；Three-phase PWM rectification circuit, is respectively connected with three phase mains and signal output end
It connects；And capacitance group, be connected with three-phase PWM rectification circuit, voltage sampling circuit is sampled by processor line voltage and
Current sampling circuit sampling phase current handled, output pulse width modulated signal with control three-phase PWM rectification circuit into
Row rectification so that the waveform of phase current follows the waveform of phase voltage, solves the problems, such as that three phase mains rectifier power factor is low,
And then achieve the effect that improve three phase mains rectifier power factor.
Description of the drawings
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the circuit diagram of three phase mains rectifier according to a first embodiment of the present invention；
Fig. 2 is the circuit diagram of three phase mains rectifier according to a second embodiment of the present invention；
Fig. 3 is the flow chart of the control method of three phase mains rectifier according to a first embodiment of the present invention；
Fig. 4 is the flow chart of the control method of three phase mains rectifier according to a second embodiment of the present invention；
Fig. 5 is the flow chart of the closed-loop control of three phase mains rectifier according to the ... of the embodiment of the present invention；
Fig. 6 is the circuit diagram of three phase mains frequency converter according to the ... of the embodiment of the present invention；
According to the oscillogram of the phase current of three phase mains in the prior art and phase voltage when Fig. 7；
Fig. 8 is the phase current of three phase mains according to the ... of the embodiment of the present invention and the oscillogram of phase voltage；
Fig. 9 is the subharmonic distribution map according to three phase mains in the prior art；And
Figure 10 is the subharmonic distribution map of three phase mains according to the ... of the embodiment of the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
An embodiment of the present invention provides a kind of three phase mains rectifier, which can be used for air conditioner.
Fig. 1 is the circuit diagram of three phase mains rectifier according to a first embodiment of the present invention.As shown in Figure 1, the three-phase electricity
Source rectifier includes：Current sampling circuit 2, voltage sampling circuit 1, processor, three-phase PWM rectification circuit 3 and capacitance group C1.
Current sampling circuit 2 is connected with three phase mains, is used for the phase current of sampling three-phase power supply.Current sampling circuit 2
The phase current of sampling can be R phases in three phase mains, in S phases and T-phase any phase phase current, can also be plurality of phase
Phase current.Wherein, R phases, S phases and T-phase are alternating current AC in three phase mains.The phase electricity that current sampling circuit 2 obtains sampling
Stream I is exported to be handled to processor.
Voltage sampling circuit 1 is connected with three phase mains, is used for the line voltage of sampling three-phase power supply.Voltage sampling circuit 1
The line voltage of sampling can be the line voltage between wantonly two in R phases in three phase mains, S phases and T-phase, can be one line of sampling
Voltage, can also when sample multiple line voltages.Voltage sampling circuit 1 by the line voltage V sampled export to processor into
Row processing.
Processor includes current input terminal, voltage input end and signal output end, current input terminal and current sampling circuit
It is connected, voltage input end is connected with voltage sampling circuit.Processor can be digital signal processor（digital
Signal processor, referred to as DSP）, can also be other processors.The current input terminal current sample electricity of processor
Road is connected the phase current for receiving current sampling circuit sampling, and voltage input end is connected with voltage sampling circuit for connecing
Receive the line voltage of voltage sampling circuit sampling.By current sampling circuit and voltage input end by analog input to processor
In, by the control method calculation process of three-phase PFC, finally press SPWM（Sinusoidal Pulse Width
Modulation, a kind of pulse-width modulation method）Rule exports six tunnels PWM1-PWM6 by signal output end and controls signal.
Three-phase PWM rectification circuit 3 is respectively connected with three phase mains and signal output end.The three-phase PWM rectification circuit 3 wraps
The switch tube assembly for constituting upper and lower bridge arm is included, which can be power module, it is preferred that three-phase PWM is whole
Current circuit 3 is the intelligent power module of integrated chip（Intelligent Power Module, referred to as IPM）, such as Fig. 1 institutes
Show, which includes insulated gate bipolar transistor（Insulated Gate Bipolar
Transistor, referred to as IGBT）Q1, Q2, Q3, Q4, Q5 and Q6 and sustained diode 1, D2, D3, D4, D5 and D6.Three-phase
In PWM rectification circuits 3, the grid of Q1, Q2, Q3, Q4, Q5 and Q6 are sequentially connected with PWM1~PWM6 of processor respectively to be connect,
The collector of IGBT pipes Q1 is connected with 1 cathode of sustained diode, emitter and the 1 anode phase of sustained diode of IGBT pipes Q1
Connection, IGBT pipes Q2, Q3, Q4, Q5 and Q6 with IGBT pipes Q1 and continue with sustained diode 2, the connection relation of D3, D4, D5 and D6
The connection relation for flowing diode D1 is similar, does not repeat here.The emitter of IGBT pipes Q1 is connected with IGBT pipe Q2 collectors
It connects, the emitter of IGBT pipes Q3 is connected with IGBT pipe Q4 collectors, emitter and the IGBT pipe Q6 collector phases of IGBT pipes Q5
Connection.The R phases of three phase mains are connected with the emitter of IGBT pipes Q1, and voltage is denoted as ua, and S phases and the IGBT of three phase mains are managed
The emitter of Q3 is connected, and voltage is denoted as ub, and the T-phase of three phase mains is connected with the emitter of IGBT pipes Q5, voltage note
For uc.
Processor is modulated by output driving pulse width（Pulse Width Modulation, abbreviation PWM）Output
PWM1~PWM6 controls the break-make of the IGBT pipes in Q1~Q6 of three-phase PWM rectification circuit 3 respectively.
Capacitance group C1 is connected with three-phase PWM rectification circuit 3.As shown in Figure 1, the anode of capacitance group and three-phase PWM rectification
In circuit 3, IGBT pipes Q1, Q3 is connected with the collector of Q5, and cathode is connected with the emitter of IGBT pipes Q2, Q4 and Q6.Electricity
Appearance group C1 is used to store carries out the direct current after rectification to three phase mains, and has certain filter action.
The three phase mains rectifier of the embodiment of the present invention further includes reactor LR、LSAnd LT, wherein r indicates each reactor pair
The internal resistance answered.
According to embodiments of the present invention, by voltage sampling circuit 1 and current sampling circuit 2 to the phase current of three phase mains and
Line voltage is sampled, and by the analog input to processor of sampling, by the control method calculation process of three-phase PFC,
SPWM rules are finally pressed to export in six tunnels PWM1~PWM6 control signal control three-phase PWM rectification circuit 3 by signal output end
IGBT pipes break-make, so that R, S, T three-phase current is passed through reactor, IGBT pipes and fly-wheel diode and capacitance group according to certain rules
C1, in reactor LR~LTIt interior storage energy and releases energy, to make R, S, T three-phase current phase follow corresponding electricity in real time
Press phase so that the phase sinusoidal of electric current, to achieve the effect that improve power factor.
Preferably, voltage sampling circuit 1 includes that first voltage sampling sub-circuit and second voltage sample sub-circuit.First electricity
The incoming end of pressure sampling sub-circuit is connected with three phase mains, and first voltage samples the voltage of the output end and processor of sub-circuit
Input terminal is connected, and it is in R phases, S phases and T-phase that first voltage, which samples sub-circuit for sampling the first line voltage, the first line voltage,
Line voltage between arbitrary two-phase.First line voltage can be the line voltage between R phases and S phases, can also be R phases and T-phase it
Between line voltage, can be the line voltage between arbitrary two-phase.
The incoming end of second voltage sampling sub-circuit is connected with three phase mains, and second voltage samples the output end of sub-circuit
Be connected with voltage input end, second voltage sample sub-circuit for sample the second line voltage, the second line voltage be R phases, S phases and
Line voltage in T-phase between arbitrary two-phase, wherein the second line voltage is different line voltages from the first line voltage.Second line electricity
Pressure can be that line voltage between R phases and S phases can also be line voltage between S phases and T-phase.First line voltage and the second line electricity
Pressure is different line voltage.
It should be noted that " first " in " first voltage sampling sub-circuit " and " second voltage sampling sub-circuit " and
" second " there is no ordinal relation, here only to facilitate a kind of description side that distinguish two sampling sub-circuits and use
Method, " the first line voltage " and " the second line voltage " similarly, do not have improper restriction to the present invention.
Preferably, current sampling circuit 2 includes the first current sample sub-circuit and the second current sample sub-circuit.
The incoming end of first current sample sub-circuit is connected with three phase mains, the output end of the first current sample sub-circuit
Be connected with current input terminal, the first current sample sub-circuit for sample the first phase current, the first phase current be R phases, S phases and
The phase current of any phase in T-phase.First phase current can be the phase current of R phases, can also be the phase current of S phases, can appoint
The phase current for a phase of anticipating.
The incoming end of second current sample sub-circuit is connected with three phase mains, the output end of the second current sample sub-circuit
Be connected with current input terminal, the second current sample sub-circuit for sample the second phase current, the second phase current be R phases, S phases and
The phase current of any phase in T-phase, wherein the second phase current is different phase currents from the first phase current.Second phase current can be
The phase current of S phases can also be the phase current of T-phase.Second phase current can be the phase of other phases different from the first phase current
Electric current.
It should be noted that " first " and " second " at this has phase with " first ", " second " among the above aforementioned
Similar function does not have improper restriction to the present invention.
Through the embodiment of the present invention, only with two-way voltage sampling circuit for detecting two different line voltages and two-way
Current detection circuit is for detecting the different phase current of two-phase, according to phase current, the phase current and line voltage of phase voltage and sampling
Between mathematical relationship other phase currents and all phase voltages are calculated so that sampled signal simplify, circuit is simple, subtracts
Sampling error is lacked.
Fig. 2 is the circuit diagram of three phase mains rectifier according to a second embodiment of the present invention.The three phase mains of the embodiment
Rectifier can be as a kind of preferred embodiment of the three phase mains rectifier of above-described embodiment.As shown in Fig. 2, the three-phase electricity
Source rectifier includes：Current sampling circuit, voltage sampling circuit, processor, three-phase PWM rectification circuit and capacitance group C1.Wherein,
Voltage sampling circuit includes first voltage sampling sub-circuit and second voltage sampling sub-circuit, and current sampling circuit includes the first electricity
Stream sampling sub-circuit and the second current sample sub-circuit.Wherein, in processor, three-phase PWM rectification circuit and capacitance group C1 and Fig. 1
Shown in processor, three-phase PWM rectification circuit 3 it is identical with capacitance group C1 functions, do not repeat here.
It includes the first operational amplifier OP1, the first input of first operational amplifier OP1 that first voltage, which samples sub-circuit,
End is connected with any one phase in R phases, S phases and T-phase, the second input terminal and R phases, S phases and the T-phase of the first operational amplifier OP1
In any phase be connected, wherein the first input end and the second input terminal of the first operational amplifier OP1 is connected with three phase mains
Phase it is different, the output end of the first operational amplifier OP1 is connected with the voltage input end of processor, wherein the first operation is put
The second input terminal of big device OP1 is connected with the output end of the first operational amplifier OP1.Since first voltage sampling sub-circuit is used
Line voltage in sampling three-phase power supply between arbitrary two-phase, therefore the first input end and second of the first operational amplifier OP1
Input terminal is connected in different phases.
As shown in Fig. 2, the first line voltage of the first voltage sampling sub-circuit sampling in the present embodiment can be for adopting
Line voltage V between sample R phases and T-phaseTR, wherein the first input end of the first operational amplifier OP1 passes through resistance R1 and three-phase electricity
The T-phase in source is connected, and the second input terminal of the first operational amplifier OP1 is connected by resistance R3 with the R phases of three phase mains.It will
Sample obtained line voltage VTRIt is exported to processor by the output end of the first operational amplifier OP1.
Second voltage sampling sub-circuit includes second operational amplifier OP2, the first input of second operational amplifier OP2
End be connected with any phase in R phases, S phases and T-phase, the second input terminal of second operational amplifier OP2 in R phases, S phases and T-phase
Any phase is connected, wherein what the first input end of second operational amplifier OP2 and the second input terminal were connected with three phase mains
Mutually different, two input terminals of second operational amplifier OP2 connect three phase mains with two input terminals of the first operational amplifier OP1
It is mutually all different, the output end of second operational amplifier OP2 is connected with the voltage input end of processor, wherein the second operation
The second input terminal of amplifier OP2 is connected with the output end of second operational amplifier OP2.Since second voltage samples sub-circuit
The line voltage of sampling is different from the line voltage of the first sampling sub-circuit sampling, and therefore, second voltage samples second in sub-circuit
The phase that two input terminals of operational amplifier OP2 and two input terminals of the first operational amplifier OP1 are connect with three phase mains not phase
Together.
As shown in Fig. 2, the second line voltage of the second operational amplifier OP2 samplings in the present embodiment can be for sampling
Line voltage V between R phases and S phasesRS, wherein the first input end of second operational amplifier OP2 passes through resistance R4 and three phase mains
T-phase be connected, the second input terminal of second operational amplifier OP2 is connected by resistance R2 with the R phases of three phase mains.It will adopt
The line voltage V that sample obtainsRSIt is exported to processor by the output end of second operational amplifier OP2.
The first input end of first operational amplifier OP1 and the first input end of second operational amplifier OP2 are respectively connected to
Reference voltage Verf.Connection is by resistance R5 between reference voltage Verf and the first input end of the first operational amplifier OP1,
Connection is by resistance R6 between reference voltage Verf and the first input end of second operational amplifier OP2.
First current sample sub-circuit includes：First current sensor 4 is arranged in R phases, S phases and T-phase in any phase；
Resistance R9, the first end of resistance R9 are connected with the first current sensor 4；The first end of resistance R10, resistance R10 and electricity
The second end of resistance R9 is connected, the second end ground connection of resistance R10；Third operational amplifier OP3, third operational amplifier OP3
First input end be respectively connected with the second end of resistance R9 and the first end of resistance R10, the of third operational amplifier OP3
Two input terminals are connected with the output end of third operational amplifier OP3, the output end of third operational amplifier OP3 also with processor
Voltage input end be connected.First phase current of the first current sample sub-circuit sampling can be the phase current in arbitrary phase,
Therefore, the first current sensor 4 can be arranged in R phases, S phases and T-phase in any phase, for sampling the phase current in the phase.
As shown in Fig. 2, the first phase current of the first current sample sub-circuit sampling of the present embodiment can be the phase in R phases
Electric current IR, the first current sensor 4 is arranged in R phases.
Second current sample sub-circuit includes：Second current sensor 5 is arranged in R phases, S phases and T-phase and the first electric current
In the different any phase of sensor 4；Resistance R11, the first end of resistance R11 are connected with the second current sensor 5；Resistance R12,
The first end of resistance R12 is connected with the second end of resistance R11, the second end ground connection of resistance R12；Four-operational amplifier OP4,
The first input end of four-operational amplifier OP4 and the second end of resistance R11 and being respectively connected with for resistance R12 first ends, the
The second input terminal of four-operational amplifier OP4 and the output end of four-operational amplifier OP4 are connected, four-operational amplifier
The output end of OP4 is also connected with the voltage input end of processor.Second phase current of the second current sample sub-circuit sampling can
To be phase current different from the first phase current in arbitrary phase, therefore, the second current sensor 5 can be arranged in R phases, S phases and T
In phase in any phase different from the first current sensor, for sampling the phase current in the phase.
As shown in Fig. 2, the second phase current of the second current sample sub-circuit sampling of the present embodiment can be the phase in S phases
Electric current IS, the second current sensor 5 is arranged in S phases.
The phase current I of current sampling circuit samplingR、ISAnd the line voltage V of voltage sampling circuit samplingRS、VTR, Yi Jixiang
Electric current IR、IS、ITWith phase voltage VR、VS、VTBetween mathematical relationship, I is calculated by dsp processorT, VR、VS、VT.Only sample
The phase current of two-phase and two phase voltages so that sampled signal simplifies, and circuit is simple, reduces sampling error, avoids and passes through
Complicated position of source appraising model is established, estimates VR、VS、VTPosition improves reliability, therefore the three-phase in the present embodiment
Power rectifier is suitably applied in the product of three phase mains transducer air conditioning.
Preferably, the three phase mains rectifier of the present embodiment further includes busbar voltage sample circuit, busbar voltage sampling
Circuit includes resistance R13 and resistance R14, for sampling through the busbar voltage V after rectifier rectificationDC。
As shown in Fig. 2, the first end of resistance R13 is connected with the anode of capacitance group.The first end and resistance of resistance R14
The second end of R13 is connected, and the second end of resistance R14 is connected with the cathode of capacitance group, wherein the first end of resistance R14 with
The voltage input end of processor is connected.The voltage input end of processor includes：First line voltage VTRInput terminal, the second line voltage
VRSInput terminal and busbar voltage VDCThe current input terminal of input terminal, processor includes the first phase current input terminal IRWith two phase electricity
Flow input terminal IS。
According to embodiments of the present invention, by busbar voltage sampling circuit samples busbar voltage, and busbar voltage is sent to
Processor is handled, and while processor carries out the control of phase current and phase voltage, control bus voltage stabilization is in busbar
On the given value Vref of voltage.
In three-phase PWM rectification circuit, Q1 and D1, Q3 and D3, Q5 and D5 are upper bridge arm, complementary Q2 and D2, Q4 and
D4, Q6 and D6 are lower bridge arm, and corresponding driving PWM1 and PWM2, PWM3 and PWM4, PWM5 and PWM6 signals are also complementary, i.e.,
PWM1, PWM3, PWM5 are logical（It is disconnected）, then it is disconnected to correspond to PWM2, PWM4, PWM6 respectively（It is logical）.When original state, Q1~Q6 is
It disconnects, dsp processor is according to duty ratio dXSend out the pwm signal of the break-make of control IGBT pipes, duty ratio
Wherein, any phase in the R phases in X expressions three phase mains, S phases, T-phase, V0For the initial voltage after rectification, that is,
The DC voltage exported from three-phase PWM rectification circuit, VXFor the line voltage of X phases, the inductance of the reactor in the corresponding phases of L, IX
For the phase current of corresponding phase, r is the internal resistance of reactor in corresponding phase, Vdc-For the voltage of the negative terminal of capacitance group.
When pwm signal is high level, the IGBT pipes for corresponding to bridge arm are connected, and complementary pair answers the IGBT of bridge arm to turn off.With R phases
For, other are mutually similar, and when Q2 is connected, electric current flows through D4 or D6 from R phase Q2, reaches S phases or T-phase and its corresponding reactor.
Reactor current rises, and stores energy, and when Q2 is turned off, reactor current declines, and the energy of storage is transferred to by D4 or D6
It in capacitance group, is used for load, then reaches S phases or T-phase.By adjust pwm signal duty ratio, make three-phase input current with
Corresponding input voltage same-phase, improves power factor (PF), and the busbar voltage of output is made to be increased to a steady state value.
The embodiment of the present invention additionally provides a kind of control method of three phase mains rectifier.This method operates in three phase mains
On the processor of rectifier.It should be noted that the control method of the three phase mains rectifier of the embodiment of the present invention can be used for
The three phase mains rectifier of the embodiment of the present invention is controlled, the three phase mains rectifier of the embodiment of the present invention can be real through the invention
The control method for applying the three phase mains rectifier of example is controlled.
Fig. 3 is the flow chart of the control method of three phase mains rectifier according to a first embodiment of the present invention.Such as Fig. 3 institutes
Show, the control method of the three phase mains rectifier is for controlling three phase mains rectifier shown in FIG. 1, and the method comprising the steps of such as
Under：
The phase voltage of three phase mains is calculated by phase current and line voltage by step S101.Phase current is current sample electricity
The phase current that road samples, line voltage are the line voltage of voltage sampling circuit sampling.Due to the phase current in three phase mains, phase
There is certain mathematical relationships between voltage and line voltage, when the phase current of sampling is a phase or two-phase phase current, root
According to the line voltage of the phase current and voltage sampling circuit sampling of current sampling circuit sampling, can be calculated in addition to sampling obtains
Phase current except phase current and all phase voltages；When the phase current of sampling is three phase currents, according to current sample
The line voltage of phase current and the voltage sampling circuit sampling of circuit sampling, it is only necessary to calculate all phase voltages.For example, electric current is adopted
The phase current of sample circuit sampling is IR、IS, the line voltage of voltage sampling circuit sampling is VRS、VTR, according to phase current IR、IS、ITWith
Phase voltage VR、VS、VTMathematical relationship between the phase current and line voltage of sampling, so that it may I is calculatedT、VR、VS、VT。
Step S102 is obtained the reference value of the phase voltage of three phase mains by the phase current and phase voltage of three phase mains.The phase
The reference value of voltage includes the phase voltage reference value V of R phasesPWM_R, the phase voltage reference value V of S phasesPWM_S, the phase voltage reference of T-phase
Value VPWM_T.Phase current I by the three phase mains being calculatedR、IS、ITAnd the given value I of phase currentref_R、Iref_S、Iref_TIt is logical
Cross PID（Proportional integral differential）It adjusts, the amount after adjusting is carried out transformation successively with the phase voltage being calculated obtains three-phase electricity
The reference value of the phase voltage in source.
Step S103 follows the phase of phase voltage according to the phase of the reference value adjustments phase current of the phase voltage of three phase mains
Position.Can the reference value of the phase voltage of three phase mains be subjected to pulse width modulation by SPWM methods, obtain pulse width modulation
Signal, that is, pwm signal, the phase that phase current is adjusted by exporting the pwm signal follow the phase of phase voltage, carried to reach
The effect of high power factor.
Preferably, step S101 can be realized by following steps：
Step S1011, receives the first phase current of the first current sample sub-circuit sampling, and the first phase current is R phases, S phases
With the phase current of any one of T-phase.First phase current can be the phase current in R phases, can also be the phase current of other phases.
Step S1012, receives the second phase current of the second current sample sub-circuit sampling, and the second phase current is R phases, S phases
With the phase current of any phase in T-phase, wherein the second phase current and the first phase current are out of phase phase current.When the first electric current
When the first phase current for sampling sub-circuit sampling is the phase current of R phases, the second phase current can be the phase current of S phases, can also
It is the phase current of T-phase.
Step S1013, receives the first line voltage of first voltage sampling sub-circuit sampling, and the first line voltage is R phases, S phases
And the phase voltage in T-phase between arbitrary two-phase.First line voltage can be the line voltage between R phases and S phases, can also be other
Two-phase between line voltage.
Step S1014, receives the second line voltage of second voltage sampling sub-circuit sampling, and the second line voltage is R phases, S phases
And the phase voltage in T-phase between arbitrary two-phase, wherein the second line voltage is different line voltages from the first line voltage.When first
When line voltage of first line voltage between R phases and S phases of voltage sample sub-circuit sampling, the second line voltage can be R phases and T
Line voltage between phase can also be the line voltage between S phases and T-phase.
Three-phase is calculated by the first phase current, the second phase current, the first line voltage and the second line voltage in step S1015
The phase voltage of phase current and three phase mains except first phase current of power supply, the second phase current.According to phase current, phase voltage and
Mathematical relationship between line voltage passes through the first phase current, the second phase current, the first line voltage and the second line voltage received
The phase current and phase voltage except the first phase current of three phase mains, the second phase current can be calculated.
According to embodiments of the present invention, by phase current, the mathematics between phase voltage and the phase current and line voltage of sampling closes
Other phase currents and all phase voltages are calculated in system so that sampled signal simplifies, and circuit is simple, reduces sampling error.
Fig. 4 is the flow chart of the control method of three phase mains rectifier according to a second embodiment of the present invention.The present embodiment
The control method of three phase mains rectifier can be as the one of the control method of the three phase mains rectifier in above-described embodiment
Kind preferred embodiment.As shown in figure 4, the control method of the three phase mains rectifier includes that steps are as follows：
The phase voltage of three phase mains is calculated by phase current and line voltage by step S201.Phase current is current sample electricity
The phase current that road samples, line voltage are the line voltage of voltage sampling circuit sampling.Due to the phase current in three phase mains, phase
There is certain mathematical relationships between voltage and line voltage, when the phase current of sampling is a phase or two-phase phase current, root
According to the line voltage of the phase current and voltage sampling circuit sampling of current sampling circuit sampling, can be calculated in addition to sampling obtains
Phase current except phase current and all phase voltages；When the phase current of sampling is three phase currents, according to current sample
The line voltage of phase current and the voltage sampling circuit sampling of circuit sampling, it is only necessary to calculate all phase voltages.For example, electric current is adopted
The phase current of sample circuit sampling is IR、IS, the line voltage of voltage sampling circuit sampling is VRS、VTR, according to phase current IR、IS、ITWith
Phase voltage VR、VS、VTMathematical relationship between the phase current and line voltage of sampling, so that it may I is calculatedT、VR、VS、VT。
Step S102 is obtained the reference value of the phase voltage of three phase mains by the phase current and phase voltage of three phase mains.The phase
The reference value of voltage includes the phase voltage reference value V of R phasesPWM_R, the phase voltage reference value V of S phasesPWM_S, the phase voltage reference of T-phase
Value VPWM_T.Phase current I by the three phase mains being calculatedR、IS、ITAnd the given value I of phase currentref_R、Iref_S、Iref_TIt is logical
Cross PID（Proportional integral differential）It adjusts, the amount after adjusting is carried out transformation successively with the phase voltage being calculated obtains three-phase electricity
The reference value of the phase voltage in source.
Step S203, using the reference value of the phase voltage of three phase mains as input signal.The input signal can be used for arteries and veins
Width modulated is rushed, drive signal is generated.
Step S204 is modulated input signal by SPWM, obtains pulse width modulating signal.Sample SPWM methods pair
The reference value of the phase voltage of three phase mains is modulated, and obtains pwm signal, i.e. drive signal, to control the break-make of IGBT pipes,
To achieve the purpose that adjust the waveform of phase current.
Step S205 calculates the duty ratio of pulse width modulating signal.Pwm signal duty ratio is calculated according to formula
Wherein, any phase in the R phases in X expressions three phase mains, S phases, T-phase, V0For the initial voltage after rectification, that is,
The DC voltage exported from three-phase PWM rectification circuit, VXFor the line voltage of X phases, the inductance of the reactor in the corresponding phases of L, IX
For the phase current of corresponding phase, r is the internal resistance of reactor in corresponding phase, Vdc-For the voltage of the negative terminal of capacitance group.According to duty
Than the output for controlling pwm signal.
Step S206 sends out pulse width modulating signal control three-phase PWM rectification circuit to adjust mutually electricity according to duty ratio
The phase of stream follows the phase of phase voltage.By the output time of the Duty ratio control pwm signal of pwm signal so that three-phase input
Electric current and corresponding input voltage same-phase.
Fig. 5 is the flow chart of the closed-loop control of three phase mains rectifier according to the ... of the embodiment of the present invention.
As seen from Figure 5, the embodiment of the present invention is using current inner loop, the Three-phase PWM Voltage Rectifier of outer voltage
The Direct Current Control method of system.Analog quantity Sampling interrupt is triggered by PWM first, and in wherein disconnected interior reading and processing sampling
The phase current of circuit, the sampled data of line voltage and busbar voltage.Then input current, voltage are carried out, busbar voltage is abnormal
It is detected with protections such as IPM module temperature exceptions.After receiving PFC open commands, voltage is first calculated using the control flow of attached drawing 5
Outer shroud, then calculating current inner ring finally calculate the fiducial value of PWM comparand registers.Dsp processor is according to the PWM of real-time update
The fiducial value of comparand register and fixed periodic quantity obtain the drive signal of control IGBT pipes, i.e. pwm signal.
A kind of three phase mains frequency converter is additionally provided according to embodiments of the present invention.
Fig. 6 is the circuit diagram of three phase mains frequency converter according to the ... of the embodiment of the present invention.As shown in fig. 6, the three phase mains becomes
Frequency device includes：Inverter 6 and three phase mains rectifier provided in an embodiment of the present invention.Wherein, the capacitance of three phase mains rectifier
The both ends of group C1 are connected with inverter 6.
Three phase mains rectifier according to the ... of the embodiment of the present invention and its control method and three phase mains frequency converter, can make
Each harmonic content in three phase mains reduces, and power factor (PF) is increased to 0.999, the total harmonic current virtual value and base of electric current
The ratio of wave current effective value（Referred to as THDi）Less than 5%, relative to the passive PFC of three-phase, power factor (PF) improves 0.2, electric current
THDi reduces 15%, in addition, by busbar voltage lifting values given value so that three phase mains rectifier and frequency converter are in air conditioner
Application in, the torque range of the compressor of air conditioner can be expanded, increase the carrying load ability of air conditioner.
According to the oscillogram of the phase current of three phase mains in the prior art and phase voltage when Fig. 7.As shown in fig. 7, identical
Moment, the phase and the phase of phase voltage V ' of phase current I ' differ.
Fig. 8 is the phase current of three phase mains according to the ... of the embodiment of the present invention and the oscillogram of phase voltage.As shown in figure 8, phase
The phase of electric current I follows the phase of phase voltage V.
Phase current is enabled to follow phase voltage using the scheme of the embodiment of the present invention it can be seen from Fig. 7 and Fig. 8, from
And improve power factor (PF).
Fig. 9 is the subharmonic distribution map according to three phase mains in the prior art.As shown in figure 9, in figure block diagram length
Indicate the size of subharmonic, subharmonic is very big in the three phase mains before this programme is not used.
Figure 10 is the subharmonic distribution map of three phase mains according to the ... of the embodiment of the present invention.As shown in Figure 10, block diagram in figure
The subharmonic of expression is greatly reduced relative to subharmonic shown in Fig. 9.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is executed in computer system, although also, logical order is shown in flow charts, and it in some cases, can be with not
The sequence being same as herein executes shown or described step.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of three phase mains rectifier, which is characterized in that including：
Current sampling circuit is connected with three phase mains, the phase current for sampling the three phase mains；
Voltage sampling circuit is connected with the three phase mains, the line voltage for sampling the three phase mains；
Processor, including current input terminal, voltage input end and signal output end, the current input terminal and the control source
End is by analog input to processor, by the control method calculation process of three-phase PFC, the current input terminal and the electricity
Stream sample circuit is connected, and the voltage input end is connected with the voltage sampling circuit；
Three-phase PWM rectification circuit is respectively connected with the three phase mains and the signal output end, the three-phase PWM rectification
Circuit includes six insulated gate bipolar transistors and six fly-wheel diodes, the collector of each insulated gate bipolar transistor
Connect respectively with the cathode of each fly-wheel diode, the emitter of each insulated gate bipolar transistor respectively with each afterflow two
The anode of pole pipe connects；And
Capacitance group is connected with the three-phase PWM rectification circuit；
It includes the first operational amplifier OP1, the first input end of the first operational amplifier OP1 that first voltage, which samples sub-circuit,
It is connected with any one phase in R phases, S phases and T-phase, the second input terminal and the R phases, the institute of the first operational amplifier OP1
It states S phases with any phase in the T-phase to be connected, wherein the first input end of the first operational amplifier OP1 and the second input
Hold mutually different, the electricity of the output end and the processor of the first operational amplifier OP1 that is connected from the three phase mains
Pressure input terminal is connected, wherein the second input terminal of the first operational amplifier OP1 and the first operational amplifier OP1
Output end be connected；
It includes second operational amplifier OP2 that second voltage, which samples sub-circuit, the first input end of the second operational amplifier OP2
Be connected with any phase in the R phases, the S phases and the T-phase, the second input terminal of the second operational amplifier OP2 with
The R phases, the S phases are connected with any phase in the T-phase, wherein the first input end of the second operational amplifier OP2
It is connected with the second input terminal from the three phase mains mutually different, two input terminals of the second operational amplifier OP2 and institute
Two input terminals for stating the first operational amplifier OP1 connect mutually being all different for the three phase mains, the second operational amplifier
The output end of OP2 is connected with the voltage input end of the processor, wherein the second of the second operational amplifier OP2 is defeated
Enter end with the output end of the second operational amplifier OP2 to be connected；And
The first input end of the first operational amplifier OP1 and the first input end difference of the second operational amplifier OP2
Access reference voltage Verf.
2. three phase mains rectifier according to claim 1, which is characterized in that the three phase mains includes：R phases, S phases and
T-phase, wherein
First voltage samples sub-circuit, and the incoming end of the first voltage sampling sub-circuit is connected with the three phase mains, institute
The output end for stating first voltage sampling sub-circuit is connected with the voltage input end, and the first voltage sampling sub-circuit is used for
The first line voltage is sampled, first line voltage is the line electricity between arbitrary two-phase in the R phases, the S phases and the T-phase
Pressure；And
Second voltage samples sub-circuit, and the incoming end of the second voltage sampling sub-circuit is connected with the three phase mains, institute
The output end for stating second voltage sampling sub-circuit is connected with the voltage input end, and the second voltage sampling sub-circuit is used for
The second line voltage is sampled, second line voltage is the line electricity between arbitrary two-phase in the R phases, the S phases and the T-phase
Pressure, wherein second line voltage is different line voltages from first line voltage.
3. three phase mains rectifier according to claim 2, which is characterized in that the current sampling circuit includes：
The incoming end of first current sample sub-circuit, the first current sample sub-circuit is connected with the three phase mains, institute
The output end for stating the first current sample sub-circuit is connected with the current input terminal, and the first current sample sub-circuit is used for
Sample the first phase current, first phase current is the phase current of any phase in the R phases, the S phases and the T-phase；
The incoming end of second current sample sub-circuit, the second current sample sub-circuit is connected with the three phase mains, institute
The output end for stating the second current sample sub-circuit is connected with the current input terminal, and the second current sample sub-circuit is used for
Sampling the second phase current, second phase current is the phase current of any phase in the R phases, the S phases and the T-phase, wherein
Second phase current is different phase currents from first phase current.
4. three phase mains rectifier according to claim 3, which is characterized in that
The first current sample sub-circuit includes：First current sensor is arranged in the R phases, the S phases and the T-phase
In in any phase；Resistance R9, the first end of the resistance R9 are connected with first current sensor；Resistance R10, the electricity
The first end of resistance R10 is connected with the second end of the resistance R9, the second end ground connection of the resistance R10；Third operation amplifier
The of device OP3, the first input end of the third operational amplifier OP3 and the second end of the resistance R9 and the resistance R10
One end is respectively connected with, the output of the second input terminal of the third operational amplifier OP3 and the third operational amplifier OP3
End is connected, and the output end of the third operational amplifier OP3 is also connected with the voltage input end of the processor；
The second current sample sub-circuit includes：Second current sensor is arranged in the R phases, the S phases and the T-phase
In in any phase different from first current sensor；Resistance R11, the first end of the resistance R11 and second electricity
Flow sensor is connected；Resistance R12, the first end of the resistance R12 are connected with the second end of the resistance R11, the electricity
Hinder the second end ground connection of R12；The first input end of four-operational amplifier OP4, the four-operational amplifier OP4 and the electricity
Hinder the second end of R11 and being respectively connected with for the resistance R12 first ends, the second input of the four-operational amplifier OP4
End is connected with the output end of the four-operational amplifier OP4, the output end of the four-operational amplifier OP4 also with it is described
The current input terminal of processor is connected.
5. three phase mains rectifier according to claim 1, which is characterized in that the three phase mains rectifier further includes mother
Line voltage sample circuit, the busbar voltage sample circuit include：
Resistance R13, the first end of the resistance R13 are connected with the anode of the capacitance group；
Resistance R14, the first end of the resistance R14 are connected with the second end of the resistance R13, and the second of the resistance R14
End is connected with the cathode of the capacitance group, wherein the first end of the resistance R14 and the control source of the processor
End is connected.
6. three phase mains rectifier according to any one of claims 1 to 5, which is characterized in that the three-phase PWM rectified current
Road is intelligent power module.
7. a kind of three phase mains frequency converter, which is characterized in that including：
Inverter；And
Claim 1 to 6 any one of them three phase mains rectifier, the both ends of the capacitance group of the three phase mains rectifier with
The inverter is connected.
8. a kind of control method of three phase mains rectifier, which is characterized in that
The three phase mains rectifier includes：
Current sampling circuit is connected with three phase mains, the phase current for sampling the three phase mains；
Voltage sampling circuit is connected with the three phase mains, the line voltage for sampling the three phase mains；
Processor, including current input terminal, voltage input end and signal output end, the current input terminal and the control source
End is by analog input to processor, by the control method calculation process of three-phase PFC, the current input terminal and the electricity
Stream sample circuit is connected, and the voltage input end is connected with the voltage sampling circuit；
Three-phase PWM rectification circuit is respectively connected with the three phase mains and the signal output end, the three-phase PWM rectification
Circuit includes six insulated gate bipolar transistors and six fly-wheel diodes, the collector of each insulated gate bipolar transistor
Connect respectively with the cathode of each fly-wheel diode, the emitter of each insulated gate bipolar transistor respectively with each afterflow two
The anode of pole pipe connects；
Capacitance group is connected with the three-phase PWM rectification circuit；
The control method includes：
The phase voltage of the three phase mains is calculated by the phase current and the line voltage；
The reference value of the phase voltage of the three phase mains is obtained by the phase current and phase voltage of the three phase mains, wherein mutually electricity
The reference value of pressure includes the phase voltage reference value V of R phasesPWM_R, the phase voltage reference value V of S phasesPWM_S, the phase voltage reference value of T-phase
VPWM_T, by the phase current I for the three phase mains being calculatedR、IS、ITAnd the given value I of phase currentref_R、Iref_S、Iref_TPass through
Proportional integral differential PID is adjusted, and the amount after adjusting is carried out transformation successively with the phase voltage being calculated obtains three phase mains
The reference value of phase voltage；And
The phase of the phase voltage is followed according to the phase of phase current described in the reference value adjustments of the phase voltage of the three phase mains.
9. the control method of three phase mains rectifier according to claim 8, which is characterized in that the three phase mains packet
It includes：R phases, S phases and T-phase, wherein the line of the phase current sampled by the current sampling circuit and voltage sampling circuit sampling
The phase voltage that the three phase mains is calculated in voltage includes：
Receive the first current sample sub-circuit sampling the first phase current, first phase current be the R phases, the S phases and
The phase current of any one of the T-phase；
The second phase current of the second current sample sub-circuit sampling is received, second phase current is any in R phases, S phases and T-phase
The phase current of phase, wherein second phase current is out of phase phase current with first phase current；
Receive first voltage sampling sub-circuit sampling the first line voltage, first line voltage be the R phases, the S phases and
Phase voltage in the T-phase between arbitrary two-phase；
Receive second voltage sampling sub-circuit sampling the second line voltage, second line voltage be the R phases, the S phases and
Phase voltage in the T-phase between arbitrary two-phase, wherein second line voltage is that different lines is electric from first line voltage
Pressure；
Institute is calculated by first phase current, second phase current, first line voltage and second line voltage
State the phase voltage of the phase current and the three phase mains except first phase current of three phase mains, second phase current.
10. the control method of three phase mains rectifier according to claim 9, which is characterized in that according to the three-phase electricity
The phase of phase current described in the reference value adjustments of the phase voltage in source follows the phase of the phase voltage to include：
Using the reference value of the phase voltage of the three phase mains as input signal；
The input signal is modulated by SPWM, obtains pulse width modulating signal；
Calculate the duty ratio of the pulse width modulating signal；
The pulse width modulating signal, which is sent out, according to the duty ratio controls the three-phase PWM rectification circuit to adjust the phase
The phase of electric current follows the phase of the phase voltage.
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| CN106452127B (en) * | 2016-10-08 | 2018-11-09 | 珠海格力电器股份有限公司 | Voltage regulation method and device and dual IPM module driver |
| CN108075670A (en) * | 2016-11-14 | 2018-05-25 | 青岛海尔智能技术研发有限公司 | For the power supply change-over device and its control method of transducer air conditioning |
| CN108288910A (en) * | 2018-04-04 | 2018-07-17 | 奥克斯空调股份有限公司 | Correcting circuit, method and the air conditioner of three-phase APFC |
| CN108288911A (en) * | 2018-04-04 | 2018-07-17 | 奥克斯空调股份有限公司 | Correcting circuit, method and the air conditioner of three-phase APFC |
| CN111446877B (en) * | 2020-03-25 | 2021-06-04 | 广东寰宇电子科技股份有限公司 | Control method and system based on two-phase three-bridge-arm inverter circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322650C (en) * | 2004-09-17 | 2007-06-20 | 清华大学 | Distributive continuous reactive generator |
| US7205749B2 (en) * | 2005-02-28 | 2007-04-17 | Texas Instruments Incorporated | Power line communication using power factor correction circuits |
| CN201340561Y (en) * | 2009-01-19 | 2009-11-04 | 中国北车股份有限公司大连电力牵引研发中心 | DC voltage-stabilized power supply based on three-phase pulsed rectifier |
| CN201860286U (en) * | 2010-08-03 | 2011-06-08 | 戴薇 | Control system for pumping unit in oil field |
| CN202906547U (en) * | 2012-10-31 | 2013-04-24 | 浙江吉利汽车研究院有限公司杭州分公司 | Vehicle-mounted battery charging device |
| CN202957609U (en) * | 2012-12-19 | 2013-05-29 | 河南恩耐基电气有限公司 | 400V grid line dynamic reactive power compensation device |
| CN203537255U (en) * | 2013-11-14 | 2014-04-09 | 珠海格力电器股份有限公司 | Three-phase power rectifier and three-phase power converter |
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2013
- 2013-11-14 CN CN201310567812.XA patent/CN104638952B/en active Active
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