CN106452046A - Switching tube control method and device of PFC circuit - Google Patents
Switching tube control method and device of PFC circuit Download PDFInfo
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- CN106452046A CN106452046A CN201610895311.8A CN201610895311A CN106452046A CN 106452046 A CN106452046 A CN 106452046A CN 201610895311 A CN201610895311 A CN 201610895311A CN 106452046 A CN106452046 A CN 106452046A
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Classifications
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a switching tube control method of a PFC circuit, which comprises the following steps: acquiring input current, input voltage and bus voltage of the PFC circuit based on each control period of the switching tube; performing deviation control on the voltage ring based on the difference value between the bus voltage set value and the bus voltage to obtain the output quantity of the voltage ring; determining a current loop reference value of the current period based on the voltage loop output quantity and a current loop reference value change threshold; performing deviation control on the current loop based on the difference value between the current loop reference value and the input current value of the current period to obtain the current loop output quantity; and adding the current loop output quantity and the feedforward quantity to obtain a duty ratio signal for controlling the on and off of a switching tube of the PFC circuit. The switching tube control method of the PFC circuit provided by the invention can effectively eliminate the phenomena of overcurrent and bus overvoltage and undervoltage caused by voltage flicker in the PFC circuit, ensures the stability of the PFC device, and is safe and effective.
Description
Technical field
The present invention relates to control field, the switch controlled method and device of more particularly, to a kind of pfc circuit.
Background technology
Pfc circuit, i.e. circuit of power factor correction, it is mainly used in electric current in processing AC to DC transition process for the power supply abnormal
Change problem.Pfc circuit mainly has two kinds, and a kind of is active pfc circuit, and another kind of is passive PFC circuit.Active PFC
Be equivalent to a Switching Power Supply, by the conducting of control chip controlling switch pipe and cut-off to make input current waveform become with
Be similar shape and synchronous sinusoidal wave shape, therefore power factor of input voltage waveform is improved.
If Fig. 1 is typical pfc circuit, this circuit is using the boost topological structure of boosting.This pfc circuit utilizes
Rectification circuit carries out bridge rectifier and obtains voltage Vac being supplied to inductor to alternating voltage, and the conducting of controlling switch pipe and cutting
Input current Iac is only made to follow the change of Vac.The operation principle of this circuit is that inductance stores energy when MOS switch pipe turns on
The energy of storage is passed through diode when switching tube ends and charges to big filter capacitor, this filter capacitor can export by amount
Smoothing and the output voltage Vdc stabilizing.
In the more fragile area of some electrical networks, voltage flicker phenomenon is very frequent, and traditional PFC control method runs into this
The situation of kind, typically all can trigger excessively stream or bus overvoltage/undervoltage fault, PFC device locking pulse stoppage protection, wait fault clearance
Restart again afterwards.Fig. 2 is the voltage flicker experiment of pfc circuit, as shown in Fig. 2 when AC-input voltage drops to from 250V
Over-current phenomenon avoidance can occur during 170V, therefore pfc circuit enters stoppage protection state.Voltage PFC device is frequently restarted, on the one hand
Infringement is produced to PFC device device lifetime itself, on the other hand electrical network can be caused than larger impact so that electrical network is more crisp
Weak.The switch controlled method of existing pfc circuit can't solve the problems, such as voltage flicker well, can cause user power utilization
Inconvenience.
Content of the invention
The purpose of the embodiment of the present invention is the switch controlled method and device providing a kind of pfc circuit, can effectively solving
That causes PFC device because of voltage flicker frequently restarts problem.
For achieving the above object, embodiments provide a kind of switch controlled method of pfc circuit, including step
Suddenly：
Each controlling cycle based on described switching tube obtains input current, input voltage and the bus electricity of pfc circuit
Pressure；
Calculate the difference of busbar voltage setting value and described busbar voltage, described difference is Voltage loop difference；Based on described
The deviation that Voltage loop difference carries out Voltage loop controls, and obtains Voltage loop output quantity；Wherein, when described Voltage loop difference is more than first
Voltage loop judgment threshold and during less than second voltage ring judgment threshold, the deviation control parameter of described Voltage loop passes through linear interpolation
Mode set；
Calculate the electric current loop reference value of current period based on described Voltage loop output quantity；Calculate the electric current of described current period
The difference of the electric current loop reference value in ring reference value and a upper cycle, if described difference is more than change threshold, described current period
Electric current loop reference value be further configured to the electric current loop reference value in a described upper cycle and the value preset of described change threshold；
Calculate the electric current loop reference value of described current period and the difference of described input current, described difference is that electric current loop is poor
Value；Controlled based on the deviation that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, when described electric current loop
When difference is more than the first electric current loop judgment threshold and is less than the second electric current loop judgment threshold, the deviation control parameter of described electric current loop
Set by way of linear interpolation；
Described electric current loop output quantity is added the switching tube conducting obtaining controlling described pfc circuit and switching tube with feedforward amount
The duty cycle signals of cut-off.
Compared with prior art, the switch controlled method of pfc circuit disclosed by the invention is by way of linear interpolation
Carry out the deviation control parameter of setting voltage ring and electric current loop, and limit the scope of electric current loop reference change, and pass through further
The deviation of electric current loop controls output valve to carry out the duty cycle signals that feedforward control show that the switching tube of control PFC turns on and ends,
Solve prior art PFC control circuit can not eliminate because the PFC device that causes of voltage flicker frequently restart problem it is ensured that
The stability of pfc circuit work, safely and effectively.
As the improvement of such scheme, the controlling cycle of described switching tube is 50us.
As the improvement of such scheme, based on described Voltage loop output quantity calculating current ring reference value specifically by following
Formula calculating current ring reference value：
IacRef=VdcOut*Vac/Vrms^2
Wherein, described IacRef is the electric current loop reference value of described current period；Described VdcOut is that described Voltage loop is defeated
Output；Described Vac is described input voltage；Described Vrms is the virtual value of described input voltage.
As the improvement of such scheme, described feedforward amount is obtained by below equation：
PWMOutFF=1-Vac/Vdc
Wherein, described PWMOutFF is described feedforward amount；Described Vac is described input voltage；Described Vdc is described bus
Voltage.
As the improvement of such scheme, the deviation of described Voltage loop controls and the deviation control of electric current loop is proportional integral
Control.Proportional plus integral control has the timely rapidly of ratio control, have again integration control eliminate more than difference ability.
As the improvement of such scheme, the deviation of described Voltage loop controls and the deviation of electric current loop controls the ratio that is-long-pending
Point-differential control.The differential action in described proportional integral differential control has the function of controls in advance.
As the improvement of such scheme, when described Voltage loop difference is more than described first voltage ring judgment threshold and is less than institute
When stating second voltage ring judgment threshold, the proportional integral control that linear interpolation is calculated described Voltage loop is carried out by below equation
Parameter processed：
Wherein, described VdcKpSet and VdcKiSet is respectively described Voltage loop difference and judges more than described first voltage ring
Threshold value and the proportionality coefficient of proportional plus integral control less than Voltage loop during described second voltage ring judgment threshold and integral coefficient；Institute
State the ratio that Kp1 and Ki1 is respectively the described Voltage loop when described Voltage loop difference is less than described first voltage ring judgment threshold
The proportionality coefficient of integration control and integral coefficient；Described Kp2 and Ki2 is respectively and works as described Voltage loop difference more than described second electricity
The proportionality coefficient of the proportional plus integral control of described Voltage loop and integral coefficient during pressure ring judgment threshold；Described VdcErr is described electricity
Pressure ring difference；Described VdcErrThrold1 and VdcErrThrold2 is respectively described Voltage loop first judgment threshold and Voltage loop
Second judgment threshold.
As the improvement of such scheme, when described electric current loop difference is more than described first electric current loop judgment threshold and is less than institute
When stating the second electric current loop judgment threshold, the proportional integral control that linear interpolation is calculated described electric current loop is carried out by below equation
Parameter processed：
Wherein, described IacKpSet and IacKiSet is respectively described electric current loop difference and judges more than described first electric current loop
Threshold value and the proportionality coefficient of proportional plus integral control less than electric current loop during described second electric current loop judgment threshold and integral coefficient；Institute
State the ratio that IKp1 and IKi1 is respectively the described electric current loop when described electric current loop difference is less than described first electric current loop judgment threshold
The proportionality coefficient of example integration control and integral coefficient；Described IKp2 and IKi2 is respectively and works as described electric current loop difference and be more than described the
The proportionality coefficient of the proportional plus integral control of described electric current loop and integral coefficient during two electric current loop judgment thresholds；Described IacErr is institute
State electric current loop difference；Described IacErrThrold1 and IacErrThrold2 is respectively described electric current loop first judgment threshold and electricity
Stream ring second judgment threshold.
As the improvement of such scheme, described switching tube is metal-oxide-semiconductor.
Further, the present invention also correspondence provides a kind of switch controlled device of pfc circuit, including：
Sampling unit, for the input current of each controlling cycle sampling pfc circuit based on described switching tube, input
Voltage and busbar voltage；
Voltage loop deviation control unit, for calculating the difference of busbar voltage setting value and busbar voltage, described difference is
Voltage loop difference；Controlled based on the deviation that described Voltage loop difference carries out Voltage loop, obtain Voltage loop output quantity；Wherein, work as institute
State Voltage loop difference be more than first voltage ring judgment threshold and less than second voltage ring judgment threshold when, the deviation of described Voltage loop
Control parameter is set by way of linear interpolation；
Electric current loop reference value computing unit, for calculating the electric current loop reference of current period based on described Voltage loop output quantity
Value；Described electric current loop reference value computing unit was additionally operable to calculate the electricity with a upper cycle for the electric current loop reference value of described current period
The difference of stream ring reference value, if described difference is more than change threshold, will be further for the electric current loop reference value of described current period
It was set as the electric current loop reference value in a described upper cycle and the value preset of described change threshold；
Electric current loop deviation control unit, for the difference of calculating current ring reference value and input current value, described difference is
Electric current loop difference；Controlled based on the deviation that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, work as institute
State electric current loop difference be more than the first electric current loop judgment threshold and less than the second electric current loop judgment threshold when, the deviation of described electric current loop
Control parameter is set by way of linear interpolation；
Duty cycle signals output unit, obtains controlling described pfc circuit for being added electric current loop output quantity with feedforward amount
Switching tube conducting and cut-off duty cycle signals.
Brief description
Fig. 1 is a kind of schematic diagram of typical case's pfc circuit.
Fig. 2 is the oscillogram of voltage flicker experiment in pfc circuit.
Fig. 3 is the flow chart of the switch controlled method of pfc circuit that the embodiment of the present invention 1 provides.
Fig. 4 is the flow chart of the switch controlled method of pfc circuit that the embodiment of the present invention 2 provides.
Fig. 5 is the technical controlling block diagram of the switch controlled method of pfc circuit that the embodiment of the present invention 2 provides.
Fig. 6 is a kind of structural representation of the switch controlled device of pfc circuit that the embodiment of the present invention 3 provides.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
Referring to Fig. 3, it is the flow chart of the switch controlled method of pfc circuit that the embodiment of the present invention 1 provides.Shown in Fig. 3
Pfc circuit switch controlled method, including step：
S11, each controlling cycle based on described switching tube obtain input current, input voltage and the mother of pfc circuit
Line voltage；
Wherein, described input current is obtained by a current detecting resistance of connecting in pfc circuit；Described bus electricity
Pressure is obtained by bleeder circuit；
The difference of S12, calculating busbar voltage setting value and described busbar voltage, described difference is Voltage loop difference；It is based on
The deviation that described Voltage loop difference carries out Voltage loop controls, and obtains Voltage loop output quantity；Wherein, when described Voltage loop difference is more than
First voltage ring judgment threshold and during less than second voltage ring judgment threshold, the deviation control parameter of described Voltage loop is passed through linear
The mode of interpolation sets；
Carry out the deviation control parameter of setting voltage ring by the way of linear interpolation, be to increase when Voltage loop difference
When, the deviation control parameter of described Voltage loop also increases therewith, can be with the control action of reinforcing feedback.
S13, the electric current loop reference value based on described Voltage loop output quantity calculating current period；Calculate described current period
The difference of the electric current loop reference value in electric current loop reference value and a upper cycle, if described difference is more than described change threshold, described
The electric current loop reference value of current period was further configured to the electric current loop reference value in a described upper cycle and described change threshold
Value preset；
In this step, the restriction of excursion has been carried out to described electric current loop reference value, can with current limit ring each
The changing value of controlling cycle, thus avoid big dash current to produce.
S14, the calculating electric current loop reference value of described current period and the difference of input current value, described difference is electric current loop
Interpolation；Controlled based on the deviation that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, when described electric current
When ring difference is more than the first electric current loop judgment threshold and is less than the second electric current loop judgment threshold, the deviation of described electric current loop controls ginseng
Number is set by way of linear interpolation；
Carry out the deviation control parameter of setting electric current ring by the way of linear interpolation, be in order to the difference when electric current loop increases
When, the deviation control parameter of described electric current loop also increases therewith, thus the control action of reinforcing feedback and dynamic response.
S15, described electric current loop output quantity is added the switching tube conducting obtaining controlling described pfc circuit with feedforward amount and opens
Close the duty cycle signals of pipe cut-off.
Employ feedforward control in step S15, equally have and strengthen the effect controlling dynamic response.It should be understood that
The described switching tube obtaining controlling described pfc circuit turn on and switching tube cut-off duty cycle signals specifically, using above-mentioned will
Described electric current loop output quantity is added the value obtaining and carries out after scale operation with feedforward amount, and the control signal of switch tube carries out PWM
Two-valued function pulse signal is exported after modulation.
Referring to Fig. 4, it is the flow chart of the switch controlled method of pfc circuit that the embodiment of the present invention 2 provides.Shown in Fig. 4
Pfc circuit switch controlled method, including step：
S21, each controlling cycle based on described switching tube obtain input current, input voltage and the mother of pfc circuit
Line voltage；
Wherein, in the present embodiment, the setup control cycle is 50us.
The difference of S22, calculating busbar voltage setting value and described busbar voltage, described difference is Voltage loop difference；It is based on
The proportional integral (PI) that described Voltage loop difference carries out Voltage loop controls, and obtains Voltage loop output quantity；When described Voltage loop difference
During more than first voltage ring judgment threshold and less than second voltage ring judgment threshold, the proportionality coefficient that the PI of described Voltage loop controls
It is calculated by following linear interpolation with integral coefficient：
Wherein, described VdcKpSet and VdcKiSet is respectively described Voltage loop difference more than first voltage ring judgment threshold
And the proportionality coefficient of PI less than Voltage loop during second voltage ring judgment threshold and integral coefficient；Described Kp1 and Ki1 is respectively and works as
Proportionality coefficient and integral coefficient that when described Voltage loop difference is less than first voltage ring judgment threshold, the PI of Voltage loop controls, described
Kp2 and Ki2 be respectively when Voltage loop difference be more than second voltage ring judgment threshold when Voltage loop PI control proportionality coefficient and
Integral coefficient；Described VdcErr is described Voltage loop difference；Described VdcErrThrold1 and VdcErrThrold2 is respectively institute
State Voltage loop first judgment threshold and Voltage loop second judgment threshold；
S23, the electric current loop reference value based on described Voltage loop output quantity and below equation calculating current period；
IacRef=VdcOut*Vac/Vrms^2
Wherein, described IacRef is the electric current loop reference value of described current period；Described VdcOut is that described Voltage loop is defeated
Output；Described Vac is input voltage；Described Vrms is the virtual value of input voltage；Calculate the electric current loop ginseng of described current period
Examined the difference of value and the electric current loop reference value in a upper cycle, if described difference is more than described change threshold, described current period
Electric current loop reference value be further configured to the electric current loop reference value in a described upper cycle and the value preset of described change threshold；
In this step, the change threshold of described electric current loop reference value is to be calculated based on the input current peak value limiting
Arrive, therefore, can avoid because input voltage declines suddenly by the excursion of current limit ring reference value causing
Over-current phenomenon avoidance, is effectively protected circuit, and the PFC device preventing voltage flicker and causing enters fault closed mode,
The normal use of impact equipment.
S24, the calculating electric current loop reference value of described current period and the difference of input current value, described difference is electric current loop
Difference；Controlled based on the proportional integral (PI) that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, when
When described electric current loop difference is more than the first electric current loop judgment threshold and is less than the second electric current loop judgment threshold, the ratio of described electric current loop
Example integration control parameter is calculated by following linear interpolation：
Wherein, described IacKpSet and IacKiSet is respectively described electric current loop difference more than the first electric current loop judgment threshold
And less than the proportionality coefficient of the PI control of electric current loop and integral coefficient during the second electric current loop judgment threshold；Described IKp1 and IKi1 divides
It is not the proportionality coefficient and integration system that the PI of the electric current loop when described electric current loop difference is less than the first electric current loop judgment threshold controls
Number, described IKp2 and IKi2 is respectively the ratio that the PI of the electric current loop when electric current loop difference is more than the second electric current loop judgment threshold controls
Example coefficient and integral coefficient；Described IacErr is described electric current loop difference；Described IacErrThrold1 and IacErrThrold2
It is respectively described electric current loop first judgment threshold and electric current loop second judgment threshold.
S25, described electric current loop output quantity is added the switching tube conducting obtaining controlling described pfc circuit with feedforward amount and opens
Close the duty cycle signals of pipe cut-off；Wherein, described feedforward amount is obtained by below equation：
PWMOutFF=1-Vac/Vdc
Wherein, described PWMOutFF is described feedforward amount；Described Vac is described input voltage value；Described Vdc is described mother
Line voltage value.
It should be noted that the present embodiment can adopt metal-oxide-semiconductor or triode as the switching tube of pfc circuit.
Referring to Fig. 5, it is the technical controlling block diagram of the switch controlled method of pfc circuit that the embodiment of the present invention 2 provides.As
Shown in Fig. 5, first bias adjustment process is carried out to busbar voltage Vdc, first difference is carried out to busbar voltage Vdc and setting value VdcSet
Calculate, more described difference is carried out with PI control and obtain Voltage loop output quantity VdcOut, by Voltage loop output quantity VdcOut and input
Voltage Vac, input voltage virtual value square inverseCarry out multiplying, output current ring reference value IacRef,
Again electric current loop reference value IacRef and input current value Iac are carried out mathematic interpolation, and described difference are carried out PI controlling and can obtaining
To electric current loop output quantity IacOut, finally electric current loop output quantity IacOut is added and can be modulated with feedforward amount PWMOutFF
The dutycycle command signal of pwm signal, described pwm signal is the pulse signal of the conducting of controlling switch pipe and cut-off.
It should be understood that in another preferred embodiment adoption rate-Integrated Derivative (PID) control as Voltage loop and
The deviation control mode of electric current loop, can improve the precision of control.
Referring to Fig. 6, it is a kind of structural representation of the switch controlled device of pfc circuit that the embodiment of the present invention 3 provides.
As shown in figure 5, the switch controlled device 100 of described pfc circuit includes sampling unit 101, Voltage loop deviation control unit
102nd, electric current loop reference value computing unit 103, electric current loop deviation control unit 104, duty cycle signals output unit 105.Wherein
Described sampling unit 101 is electric for the input current of each controlling cycle sampling pfc circuit based on described switching tube, input
Pressure and busbar voltage；Described Voltage loop deviation control unit 102 is used for calculating the difference of busbar voltage setting value and busbar voltage,
Controlled based on the deviation that described difference carries out Voltage loop, output-voltage loop output quantity；Described electric current loop reference value computing unit 103
For determining the electric current loop reference of current period based on the Voltage loop output quantity that described Voltage loop deviation control unit 102 exports
Value；Described electric current loop deviation control unit 104, for calculating the electric current loop of described electric current loop reference value computing unit 103 output
Reference value and the difference of input current value, are controlled based on the deviation that described difference carries out electric current loop, output current ring output quantity；Institute
State duty cycle signals output unit 105, for electric current loop output quantity that described electric current loop deviation control unit 104 is exported with front
Feedback amount is added the duty cycle signals obtaining controlling the switching tube of described pfc circuit to turn on and end.
Below, the course of work of the switch controlled device to the pfc circuit shown in Fig. 6 is specifically described.Described
Voltage loop deviation control unit 102 first carries out mathematic interpolation to the bus voltage value that described sampling unit 101 obtains with setting value,
Again deviation control is carried out based on described difference, obtain Voltage loop output quantity；Wherein, when described Voltage loop difference is more than first voltage
Ring judgment threshold and during less than second voltage ring judgment threshold, the deviation control parameter of the described Voltage loop side by linear interpolation
Formula sets, and the deviation of described Voltage loop is controlled to PI control or PID control；Then, above-mentioned Voltage loop output quantity is delivered to
The electric current loop reference value that described electric current loop reference value computing unit 103 carries out current period calculates；Electricity when described current period
When the difference of the electric current loop reference value in stream ring reference value and a upper cycle is more than change threshold, by the electric current loop of described current period
Reference value was further configured to the electric current loop reference value in a described upper cycle and the value preset of described change threshold；Then, described electricity
The electric current loop reference value of fixed current period is delivered to described electric current loop deviation and controls by stream ring reference value computing unit 103
The difference of unit 104, calculating current ring reference value and input current value, and carry out the deviation control of electric current loop based on described difference
System, obtains electric current loop output quantity；Wherein, when described electric current loop difference is more than the first electric current loop judgment threshold and is less than the second electric current
During ring judgment threshold, the deviation control parameter of described electric current loop is set by way of linear interpolation, the deviation of described electric current loop
It is controlled to PI control or PID control；Finally, described duty cycle signals output unit 105 by above-mentioned electric current loop output quantity with front
Feedback amount determines the dutycycle output pulse signal of pwm signal after being added, thus the cut-off of the conducting of controlling switch pipe and switching tube.
Switch controlled device provided in an embodiment of the present invention is carried out to the parameter controlling in the deviation of Voltage loop and electric current loop controls
Linear interpolation processing, and limit the excursion of current reference value, also add feedforward control in a device further, can prevent
Excessively stream during voltage flicker and bus overvoltage/undervoltage phenomenon produce it is ensured that the stability of PFC device work.
In sum, the switch controlled method of pfc circuit provided in an embodiment of the present invention, by way of linear interpolation
Carry out the deviation control parameter of setting voltage ring and electric current loop, and limit the scope of electric current loop reference change, and further to electricity
The deviation of stream ring controls output valve to carry out the duty cycle signals that feedforward control show that the switching tube of control PFC turns on and ends, solution
Prior art of having determined PFC control circuit can not eliminate because the excessively stream of pfc circuit that causes of voltage flicker or bus overvoltage/undervoltage are existing
As effectively prevent PFC device and frequently restart phenomenon because of voltage flicker it is ensured that the stability of network operation, improve
The life-span of PFC device work.
The above is the preferred embodiment of the present invention it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of switch controlled method of pfc circuit is it is characterised in that include step：
Each controlling cycle based on described switching tube obtains input current, input voltage and the busbar voltage of pfc circuit；
Calculate the difference of busbar voltage setting value and described busbar voltage, described difference is Voltage loop difference；Based on described voltage
The deviation that ring difference carries out Voltage loop controls, and obtains Voltage loop output quantity；Wherein, when described Voltage loop difference is more than first voltage
Ring judgment threshold and during less than second voltage ring judgment threshold, the deviation control parameter of the described Voltage loop side by linear interpolation
Formula sets；
Calculate the electric current loop reference value of current period based on described Voltage loop output quantity；Calculate the electric current loop ginseng of described current period
Examined the difference of value and the electric current loop reference value in a upper cycle, if described difference is more than change threshold, the electricity of described current period
Stream ring reference value was further configured to the electric current loop reference value in a described upper cycle and the value preset of described change threshold；
Calculate the electric current loop reference value of described current period and the difference of described input current, described difference is electric current loop difference；
Controlled based on the deviation that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, when described electric current loop difference
More than the first electric current loop judgment threshold and less than the second electric current loop judgment threshold when, the deviation control parameter of described electric current loop is passed through
The mode of linear interpolation sets；
Described electric current loop output quantity is added the switching tube conducting obtaining controlling described pfc circuit and switching tube cut-off with feedforward amount
Duty cycle signals.
2. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that the control of described switching tube is all
Phase is 50us.
3. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that exported based on described Voltage loop
Amount and below equation calculating current ring reference value：
IacRef=VdcOut*Vac/Vrms^2
Wherein, described IacRef is the electric current loop reference value of described current period；Described VdcOut is described Voltage loop output quantity；
Described Vac is described input voltage；Described Vrms is the virtual value of described input voltage.
4. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that described feedforward amount is by following
Formula obtains：
PWMOutFF=1-Vac/Vdc
Wherein, described PWMOutFF is described feedforward amount；Described Vac is described input voltage；Described Vdc is described bus electricity
Pressure.
5. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that the deviation control of described Voltage loop
The deviation control of system and electric current loop is proportional plus integral control.
6. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that the deviation control of described Voltage loop
The deviation control of system and electric current loop is proportional integral differential control.
7. pfc circuit as claimed in claim 5 switch controlled method it is characterised in that when described Voltage loop difference big
In described first voltage ring judgment threshold and less than described second voltage ring judgment threshold when, linearly inserted by below equation
Value is calculated the proportional plus integral control parameter of described Voltage loop：
Wherein, described VdcKpSet and VdcKiSet is respectively described Voltage loop difference more than described first voltage ring judgment threshold
And the proportionality coefficient of proportional plus integral control less than described Voltage loop during described second voltage ring judgment threshold and integral coefficient；Institute
State the ratio that Kp1 and Ki1 is respectively the described Voltage loop when described Voltage loop difference is less than described first voltage ring judgment threshold
The proportionality coefficient of integration control and integral coefficient；Described Kp2 and Ki2 is respectively and works as described Voltage loop difference more than described second electricity
The proportionality coefficient of the proportional plus integral control of described Voltage loop and integral coefficient during pressure ring judgment threshold；Described VdcErr is described electricity
Pressure ring difference；VdcErrThrold1 and VdcErrThrold2 is respectively described Voltage loop first judgment threshold and Voltage loop second
Judgment threshold.
8. pfc circuit as claimed in claim 5 switch controlled method it is characterised in that when described electric current loop difference big
In described first electric current loop judgment threshold and less than described second electric current loop judgment threshold when, linearly inserted by below equation
Value is calculated the proportional plus integral control parameter of described electric current loop：
Wherein, described IacKpSet and IacKiSet is respectively described electric current loop difference more than described first electric current loop judgment threshold
And the proportionality coefficient of proportional plus integral control less than described electric current loop during described second electric current loop judgment threshold and integral coefficient；Institute
State the ratio that IKp1 and IKi1 is respectively the described electric current loop when described electric current loop difference is less than described first electric current loop judgment threshold
The proportionality coefficient of example integration control and integral coefficient；Described IKp2 and IKi2 is respectively and works as described electric current loop difference and be more than described the
The proportionality coefficient of the proportional plus integral control of described electric current loop and integral coefficient during two electric current loop judgment thresholds；Described IacErr is institute
State electric current loop difference；Described IacErrThrold1 and IacErrThrold2 is respectively described electric current loop first judgment threshold and electricity
Stream ring second judgment threshold.
9. the switch controlled method of pfc circuit as claimed in claim 1 is it is characterised in that described switching tube is metal-oxide-semiconductor.
10. a kind of switch controlled device of pfc circuit is it is characterised in that include：
Sampling unit, for the input current of each controlling cycle sampling pfc circuit based on described switching tube, input voltage
And busbar voltage；
Voltage loop deviation control unit, for calculating the difference of busbar voltage setting value and busbar voltage, described difference is voltage
Ring difference；Controlled based on the deviation that described Voltage loop difference carries out Voltage loop, obtain Voltage loop output quantity；Wherein, when described electricity
When pressure ring difference is more than first voltage ring judgment threshold and is less than second voltage ring judgment threshold, the deviation of described Voltage loop controls
Parameter is set by way of linear interpolation；
Electric current loop reference value computing unit, for calculating the electric current loop reference value of current period based on described Voltage loop output quantity；
Described electric current loop reference value computing unit was additionally operable to calculate the electric current with a upper cycle for the electric current loop reference value of described current period
The difference of ring reference value, if described difference is more than change threshold, the electric current loop reference value of described current period is set further
It was set to the electric current loop reference value in a described upper cycle and the value preset of described change threshold；
Electric current loop deviation control unit, for the difference of calculating current ring reference value and input current, described difference is electric current loop
Difference；Controlled based on the deviation that described electric current loop difference carries out electric current loop, obtain electric current loop output quantity；Wherein, when described electric current
When ring difference is more than the first electric current loop judgment threshold and is less than the second electric current loop judgment threshold, the deviation of described electric current loop controls ginseng
Number is set by way of linear interpolation；
Duty cycle signals output unit, obtains controlling opening of described pfc circuit for being added electric current loop output quantity with feedforward amount
Close the duty cycle signals of pipe conducting and cut-off.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294370A (en) * | 2017-08-11 | 2017-10-24 | 广州视源电子科技股份有限公司 | Control method, device and equipment of PFC circuit and storage medium |
| CN107656131A (en) * | 2017-09-25 | 2018-02-02 | 联想(北京)有限公司 | A kind of over-voltage detection circuit and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605142A (en) * | 2012-03-23 | 2012-07-25 | 中冶南方工程技术有限公司 | Method of auto-setting calculation for proportional coefficient of electrode regulator of ladle refining furnace |
| CN102684470A (en) * | 2012-04-01 | 2012-09-19 | 中南大学 | Method for controlling stable operation of integer power factor of variable-frequency air conditioner |
| CN102857087A (en) * | 2012-09-17 | 2013-01-02 | 海信（山东）空调有限公司 | Adaptive control method of power factor |
| CN103746552A (en) * | 2014-01-23 | 2014-04-23 | 厦门科华恒盛股份有限公司 | Control system and control method for stepless current limiting of switch power supply |
| CN104362844A (en) * | 2014-11-28 | 2015-02-18 | 广州视源电子科技股份有限公司 | Control method and device for power factor correction |
| CN104467396A (en) * | 2013-09-24 | 2015-03-25 | 厦门蓝溪科技有限公司 | Digital PFC control system for power source products |
| CN205195552U (en) * | 2015-11-20 | 2016-04-27 | 南京理工大学 | Power factor correction converter of wide load scope |
-
2016
- 2016-10-13 CN CN201610895311.8A patent/CN106452046B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605142A (en) * | 2012-03-23 | 2012-07-25 | 中冶南方工程技术有限公司 | Method of auto-setting calculation for proportional coefficient of electrode regulator of ladle refining furnace |
| CN102684470A (en) * | 2012-04-01 | 2012-09-19 | 中南大学 | Method for controlling stable operation of integer power factor of variable-frequency air conditioner |
| CN102857087A (en) * | 2012-09-17 | 2013-01-02 | 海信（山东）空调有限公司 | Adaptive control method of power factor |
| CN104467396A (en) * | 2013-09-24 | 2015-03-25 | 厦门蓝溪科技有限公司 | Digital PFC control system for power source products |
| CN103746552A (en) * | 2014-01-23 | 2014-04-23 | 厦门科华恒盛股份有限公司 | Control system and control method for stepless current limiting of switch power supply |
| CN104362844A (en) * | 2014-11-28 | 2015-02-18 | 广州视源电子科技股份有限公司 | Control method and device for power factor correction |
| CN205195552U (en) * | 2015-11-20 | 2016-04-27 | 南京理工大学 | Power factor correction converter of wide load scope |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294370A (en) * | 2017-08-11 | 2017-10-24 | 广州视源电子科技股份有限公司 | Control method, device and equipment of PFC circuit and storage medium |
| CN107656131A (en) * | 2017-09-25 | 2018-02-02 | 联想(北京)有限公司 | A kind of over-voltage detection circuit and method |
| CN107863880A (en) * | 2017-11-28 | 2018-03-30 | 华中科技大学 | A kind of totem PFC full digital control method and device |
| CN107863880B (en) * | 2017-11-28 | 2019-05-14 | 华中科技大学 | A kind of full digital control method and device of totem PFC |
| CN109936203A (en) * | 2017-12-18 | 2019-06-25 | 奥克斯空调股份有限公司 | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit |
| CN111600476B (en) * | 2020-06-08 | 2023-11-07 | 深圳威迈斯新能源股份有限公司 | PFC circuit control signal adjusting system and method |
| CN111600476A (en) * | 2020-06-08 | 2020-08-28 | 深圳威迈斯新能源股份有限公司 | System and method for adjusting PFC circuit control signal |
| CN112019037A (en) * | 2020-08-07 | 2020-12-01 | 珠海格力电器股份有限公司 | PFC circuit start control method, device, equipment and computer readable medium |
| CN112290506A (en) * | 2020-09-29 | 2021-01-29 | 四川虹美智能科技有限公司 | Surge protection device and method |
| CN112467972A (en) * | 2020-11-17 | 2021-03-09 | 四川虹美智能科技有限公司 | Control method and device of PFC circuit |
| CN112821744B (en) * | 2021-03-25 | 2022-07-12 | 漳州科华技术有限责任公司 | Control method and system of converter with booster circuit |
| CN112821744A (en) * | 2021-03-25 | 2021-05-18 | 漳州科华技术有限责任公司 | Control method and system of converter with booster circuit |
| CN113258760A (en) * | 2021-05-14 | 2021-08-13 | 珠海格力电器股份有限公司 | Circuit control method and device, electronic equipment and storage medium |
| CN113258760B (en) * | 2021-05-14 | 2022-11-11 | 珠海格力电器股份有限公司 | Circuit control method and device, electronic equipment and storage medium |
| CN116581821A (en) * | 2023-07-12 | 2023-08-11 | 深圳天邦达科技有限公司 | Method for improving running stability of PFC weak current network |
| CN116581821B (en) * | 2023-07-12 | 2024-02-23 | 深圳天邦达科技有限公司 | Method for improving running stability of PFC weak current network |
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