CN106533210B - A kind of single-phase falling-rising pressure type AC-DC converter and its control method - Google Patents
A kind of single-phase falling-rising pressure type AC-DC converter and its control method Download PDFInfo
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- CN106533210B CN106533210B CN201611065239.2A CN201611065239A CN106533210B CN 106533210 B CN106533210 B CN 106533210B CN 201611065239 A CN201611065239 A CN 201611065239A CN 106533210 B CN106533210 B CN 106533210B
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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
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a kind of single-phase falling-rising pressure type AC DC converters and its control methods, it includes the diode rectifier and falling-rising voltage type transducer main circuit of connection, falling-rising voltage type transducer main circuit includes voltage reduction module switch and Boost-Mode switch, master controller is according to input voltage signal, input current signal and output voltage signal determine converter operating mode, control voltage reduction module switch only switches under decompression and falling-rising die pressing type respectively, it is fully under boost mode, Boost-Mode switch only switches under boosting and falling-rising die pressing type, it is completely switched off in buck mode；The present invention has the advantages that reduce electric current of surging, improves transfer efficiency, the conducting damage of reduction switch and switching damage, wide input voltage range, the response of voltage circuit will not change with the change of input voltage, it is to maintain good dynamic response, and reach the purpose of high work(factor and good voltage regulation factor simultaneously in full voltage range.
Description
Technical field
The present invention relates to converter more particularly to a kind of single-phase falling-rising pressure AC-DC formulas converter and its control methods.
Background technology
Boost type AC to DC converter is the front stage circuits for being most commonly used for switched-mode power supply（As shown in Figure 1）, use
To provide the function of adjustment input power factor (PFC), circuit is made to have High Power Factor and input current low distortion.However
Input voltage can directly charge to the bulky capacitor of output end when boost type AC to DC converter starts, and cause larger surge
Electric current (Inrush current), next output voltage necessarily are greater than the peak value of input voltage, and for needing to adapt to Global Link
With the application requirement of input voltage (universal AC voltage), at a low input voltages, circuit step-up ratio is high, efficiency compared with
Difference.To overcome the problems, such as that this uses in the industry falling-rising voltage type transducer as shown in Figure 2, input voltage will not be straight on startup for this circuit
It connects and charges to output capacitance, without current problems of surging, secondary circuit can be suitble to the application of global general-use input voltage with buck
It is required that；However this circuit has compared with conventional boost formula circuit compared with multicompartment, generally believes that its efficiency is poor, next inductance is also
It is non-to be located at input side, it is difficult to directly control this electric current and reach the purpose for making input current involve low distortion for sine.
Invention content
The present invention is to solve electric currents of surging in the prior art it is larger, efficiency is poor, component is more the defects of, propose a kind of
Single-phase falling-rising pressure type AC-DC converter and its control method.
Turn in order to solve the above technical problems, technical solution proposed by the present invention is a kind of single-phase falling-rising pressure type AC-DC of design
Parallel operation, including sequentially connected diode rectifier and falling-rising voltage type transducer main circuit, in falling-rising voltage type transducer main circuit
Boosting including the voltage reduction module switching tube and connection diode rectifier output negative pole that connect diode rectifier output cathode
Mode switch pipe further includes：Input voltage sense circuit is connected to the output end of diode rectifier, to sense input
Voltage signal；Input current sensing circuit, is connected in the output loop of diode rectifier, and by feeling after low-pass filter
Survey input current signal；Output voltage sensing circuit connects the output end of this converter, to sense output voltage；Master control
Device, according to the input voltage signal, input current signal and output voltage signal of sensing determine converter work in decompression mode,
Or boost mode or falling-rising die pressing type, the first and second pulse width modulation circuits are controlled respectively；First pulse width modulation electricity
Road sends out PWM switching signals under the control of master controller, makes the voltage reduction module switching tube only in decompression and falling-rising die pressing type
It is lower to switch, is fully under boost mode；Second pulse width modulation circuit, under the control of master controller sending out PWM cuts
Signal is changed, the Boost-Mode switch pipe is made to switch only under boosting and falling-rising die pressing type, is completely switched off in buck mode；
Under falling-rising die pressing type, voltage reduction module switching tube and Boost-Mode switch pipe will not simultaneously turn on cut-off.Above-mentioned master controller will be defeated
Go out the output voltage that voltage sensing circuit senses to compare with predeterminated voltage order, the error amount of the two is via voltage controller
Error transfer factor signal is obtained after adjustment, which is multiplied again divided by has been multiplied with the input voltage signal again adjusts system
The square value of several input voltage signals, obtains input current control command, and input current control command subtracts the input electricity
Pwm voltage signal is obtained after current error amplifier adjusts after stream signal, which is conveyed to simultaneously
The in-phase input end of first and second pulse width modulation circuits.The anti-phase input of above-mentioned first pulse width modulation circuit terminates
One fixes sawtooth wave, the anti-phase input termination of second pulse width modulation circuit always flow can shifted sawtooth wave, this is straight
Flow can shifted sawtooth wave be fixed sawtooth wave with a DC offset and, the DC offset includes preset fixed value
Offset and float value offset, the float value offset are multiplied by a gain by the error transfer factor signalKIt is obtained.
A kind of control method of single-phase falling-rising pressure type AC-DC converter, including sequentially connected two have also been devised in the present invention
Pole pipe rectifier and falling-rising voltage type transducer main circuit, falling-rising voltage type transducer main circuit include that connection diode rectifier is defeated
Go out the Boost-Mode switch pipe of the voltage reduction module switching tube and connection diode rectifier output negative pole of anode comprising：With defeated
Enter the output end that voltage sensing circuit is connected to diode rectifier, to sense input voltage signal；Electricity is sensed with input current
Road is connected in the output loop of diode rectifier, and by sensing input current signal after low-pass filter；With output electricity
Pressure sensitivity slowdown monitoring circuit connects the output end of this converter, to sense output voltage；Master controller according to the input voltage signal of sensing,
Input current signal and output voltage signal determine that converter works in decompression mode or boost mode or falling-rising die pressing type, point
The first and second pulse width modulation circuits are not controlled；First pulse width modulation circuit is sent out under the control of master controller
PWM switching signals make the voltage reduction module switching tube switch only under decompression and falling-rising die pressing type, be led completely under boost mode
It is logical；Second pulse width modulation circuit sends out PWM switching signals under the control of master controller, makes the Boost-Mode switch
Pipe switches only under boosting and falling-rising die pressing type, is completely switched off in buck mode；Under falling-rising die pressing type, voltage reduction module switch
Pipe and Boost-Mode switch pipe will not simultaneously turn on cut-off.The output that above-mentioned master controller arrives output voltage sensing circuit senses
Voltage is compared with predeterminated voltage order, and the error amount of the two obtains error transfer factor signal after being adjusted via voltage controller, should
Error transfer factor signal be multiplied again divided by multiplied with the input voltage signal again regulation coefficient input voltage signal square value,
Obtain input current control command, input current control command subtracts after the input current signal through current error amplifier tune
Pwm voltage signal is obtained after whole, which is conveyed to the first and second pulse width modulation circuits simultaneously
In-phase input end.The anti-phase input termination one of above-mentioned first pulse width modulation circuit fixes sawtooth wave, second pulse
The anti-phase input termination of width modulation circuit always flow can shifted sawtooth wave, the DC quantity can shifted sawtooth wave be fixed sawtooth
Wave and a DC offset and, the DC offset includes preset fixed value offset and float value offset, described
Float value offset is multiplied by a gain by the error transfer factor signalKIt is obtained.
Compared with prior art, the present invention can change its operating mode according to input voltage and load, in falling-rising
Switch in die pressing type, boost mode and falling-rising die pressing type these three operating modes, has and reduce electric current of surging, improve conversion effect
The advantages of rate, the conducting damage for reducing switch are damaged with switching, the response of wide input voltage range, voltage circuit will not be with input voltage
Change and change, be to maintain good dynamic response, and reach high work(factor and good electricity simultaneously in full voltage range
Press the purpose of regulation.
Description of the drawings
Fig. 1 is existing boost type AC to DC converter main circuit diagram；
Fig. 2 is existing falling-rising pressure type AC to DC converter main circuit diagram；
Fig. 3 is the circuit diagram of present pre-ferred embodiments；
Fig. 4 is converter operating mode and switching waveform compares figure；
Fig. 5 is the proof diagram of software simulation drawing 3；
Input current oscillogram corresponding with output voltage when Fig. 6 is circuit start；
Fig. 7 is working waveform figure in buck mode；
Fig. 8 is the working waveform figure under boost mode；
Fig. 9 is the trigger signal and output voltage waveforms compares figure of switch；
Figure 10 is the response wave shape figure in the case where 230Vac input voltages and 300W are fully loaded；
Figure 11 is the response diagram under 230Vac input voltages and 60W underloadings.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is described in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not
For limiting the present invention.
Present invention is disclosed a kind of single-phase falling-rising pressure type AC-DC converters, referring to Fig. 3 comprising since alternating voltage
Sequentially connected electromagnetic interface filter diode rectifier and falling-rising voltage type transducer main circuit.The wherein main electricity of falling-rising voltage type transducer
Road includes the voltage reduction module switching tube Q1 and connection diode rectifier output negative pole for connecting diode rectifier output cathode
Boost-Mode switch pipe Q2.Converter further includes input voltage sense circuit, and the anode for being connected to diode rectifier is defeated
Outlet, by voltage sensing ratioK v Transformation obtain input voltage signalK v V in ；Further include input current sensing circuit, connection
In the output loop negative electrode bus of diode rectifier, and by sensing input current signal after low-pass filterK s I in （Figure
InI s =K s I in ）；Further include output voltage sensing circuit, connect the output end of this converter, to sense output voltage；Also
Including master controller, according to the input voltage signal of sensingK v V in , input current signalK s I in It is determined with output voltage signal
Converter works in decompression mode or boost mode or falling-rising die pressing type.The selection of these three patterns is by master controller point
The first and second pulse width modulation circuits are not controlled（PWM1、PWM2）, and then control voltage reduction module switching tube Q1 and boosting mould
The combination of formula switching tube Q2 switches to realize.First pulse width modulation circuit PWM1, sends out under the control of master controller
PWM switching signals make the voltage reduction module switching tube Q1 switch only under decompression and falling-rising die pressing type, are complete under boost mode
Conducting；Second pulse width modulation circuit PWM2, sends out PWM switching signals under the control of master controller, makes the boosting mould
Formula switching tube Q2 switches only under boosting and falling-rising die pressing type, is completely switched off in buck mode；Under falling-rising die pressing type, decompression
Module switch pipe and Boost-Mode switch pipe will not simultaneously turn on cut-off.
Referring to Fig. 3, in the preferred embodiment, the output voltage that the master controller arrives output voltage sensing circuit senses
With predeterminated voltage orderV d * It compares（Predeterminated voltage bid value subtracts output voltage values）, the error amount of the two controls via voltage
DeviceG v Error transfer factor signal is obtained after adjustmentV ea , the error transfer factor signalV ea Again with the input voltage signalK v V in Multiplication removes again
WithK 1 (K v V in )2Obtain input current control commandI s *, whereinK 1 (K v V in )2Adjustment is multiplied for the square value of input voltage signal
CoefficientK 1 , input current control commandI s *Subtract the input current signalK s I in By current error amplifierG CA After adjustment
To pwm voltage signalV con , the pwm voltage signalV con It is conveyed to the first and second pulse width modulation circuits simultaneously
（PWM1、PWM2）In-phase input end.It may be noted that sensing input current by low-pass filter purpose be to acquire it is defeated
The average current entered, this average current pass through current error amplifier（G CA ）, a Current Feedback Control is formed after PWM1, PWM2
Circuit so that it can closely follow input current control commandI s *, then input current must be with input voltage with the sine of phase
Wave reaches the purpose of control input power factor and low current distortion.
Switching damage is undermined with raising efficiency in order to reduce conducting, this converter is provided with three kinds of operating modes.Referring to Fig. 4,
Wherein in input voltage waveform | Vs | boost mode is operated in when far below output voltage Vd, in input voltage waveform | and Vs | in defeated
The grey voltage area gone out near voltage Vd then operates in falling-rising die pressing type, in input voltage waveform | Vs | it is far above output voltage
Decompression mode is operated in when Vd.This operating mode can obtain preferable efficiency reasons and be：(1) voltage reduction module switching tube Q1 only exists
Switch under decompression and falling-rising die pressing type, it reduces switching damage to be fully under boost mode.(2) Boost-Mode switch pipe Q2
Only switch under boosting and falling-rising die pressing type, it reduces switching and conducting damage to be completely switched off under decompression mode.(3) in falling-rising
Under die pressing type, switch Q1 and Q2 will not simultaneously turn on cut-off and exist as traditional lift converter energy need to be stored in inductance completely
Conversion, but the interactive action that is depressured and boosts, reduce inductive energy storage demand and electric current, reduce iron loss and conducting damage, promotion electricity
Road efficiency.
In order to automatically switch between three kinds of operating modes, two pulse width modulation circuits use different sawtooth waves.
Referring to Fig. 3, the anti-phase input termination one of the first pulse width modulation circuit PWM1 fixes sawtooth waveV t1 （V t1 By sawtooth wave
Generator automatically generates）, flow can shifted sawtooth always for the anti-phase input termination of the second pulse width modulation circuit PWM2
WaveV t2 .The DC quantity can shifted sawtooth waveV t2 For fixed sawtooth waveV t1 With a DC offsetV os Sum.The DC offsetV os Including preset fixed value offsetV os1 （V os1 For being set in the most lower limit of buck-boost mode at light load）It is inclined with float value
Shifting amountV os2 （It is setting the range of falling-rising die pressing type）.The float value offset Vos2 is by the error transfer factor signal Vea
A gain K is multiplied by be obtained, in underloading or high input voltage, Vos2 is lower value, otherwise in heavy duty or low input
Vos2 is high value.When Vos2 is lower value, Vt1 and Vt2 size waveforms overlapping areas are smaller, that is, the range of decompression mode is got over
Greatly, the switching times of switch Q2 are lower, and changing automatic reduce with operating point switches damage.
In order to become apparent from the work for illustrating foregoing circuit, the system that Fig. 5 establishes a 300W with software, exports 210Vdc is main
Circuit and control circuit are established according to above-mentioned principle.Input current wave corresponding with output voltage when Fig. 6 show circuit start
Shape figure, display output voltage can linearly be risen to the output voltage of setting by no-voltage.The input current of sensing can be tight
It is close to follow its current order, therefore the sine wave that the input current exchanged is low distortion.Fig. 7 and Fig. 8 be respectively displayed on decompression and
Work wave under boost mode, the sawtooth wave Vt1 and Vt2 of two pwm pulse width modulation circuits can also understand thus two
Figure is learnt, and generates the trigger signal of switch as shown in figure 9, may achieve mode shown in Fig. 4 really reduces the switching time of switch
Number and conducting damage.Final output waveform is as shown in Figures 10 and 11, either heavy duty or underloading can obtain high power because
Number and low distortion electric current.
Present invention further teaches the control methods of single-phase falling-rising pressure type AC-DC converter, including sequentially connected diode
Rectifier and falling-rising voltage type transducer main circuit, falling-rising voltage type transducer main circuit include that connection diode rectifier exports just
The Boost-Mode switch pipe Q2 of the voltage reduction module switching tube Q1 of pole and connection diode rectifier output negative pole further includes：With
Input voltage sense circuit is connected to the output end of diode rectifier, to sense input voltage signalK v V in ；Use input current
Sensing circuit is connected in the output loop of diode rectifier, and by sensing input current signal after low-pass filterK s I in ；The output end that this converter is connected with output voltage sensing circuit, to sense output voltage；Master controller is according to sensing
Input voltage signalK v V in , input current signalK s I in Determine that converter works in decompression mode or liter with output voltage signal
Die pressing type or falling-rising die pressing type, control the first and second pulse width modulation circuits respectively（PWM1、PWM2）；First pulse is wide
Modulation circuit PWM1 is spent, PWM switching signals are sent out under the control of master controller, the voltage reduction module switching tube Q1 is made only to drop
Switch under pressure and falling-rising die pressing type, is fully under boost mode；Second pulse width modulation circuit PWM2, in master controller
Control under send out PWM switching signals, so that the Boost-Mode switch pipe Q2 switched only under boosting and falling-rising die pressing type, dropped
It is completely switched off under die pressing type；Under falling-rising die pressing type, voltage reduction module switching tube and Boost-Mode switch pipe will not be simultaneously turned on and be cut
Only.
Referring to Fig. 3, in the preferred embodiment, the output voltage that above-mentioned master controller arrives output voltage sensing circuit senses
With predeterminated voltage orderV d * It compares（Predeterminated voltage bid value subtracts output voltage values）, the error amount of the two controls via voltage
DeviceG v Error transfer factor signal is obtained after adjustmentV ea , the error transfer factor signalV ea Again with the input voltage signalK v V in Multiplication removes again
To have multiplied regulation coefficientK 1 Input voltage signal square valueK 1 (K v V in )2, obtain input current control commandI s *, input electricity
Flow control orderI s *Subtract the input current signalK s I in By current error amplifierG CA PWM control electricity is obtained after adjustment
Press signalV con , the pwm voltage signalV con It is conveyed to the first and second pulse width modulation circuits simultaneously（PWM1、PWM2）
In-phase input end.It may be noted that the input current of sensing is by the average electricity that the purpose of low-pass filter is input to be acquired
Stream, this average current pass through current error amplifier（G CA ）, a current feedback control loop is formed after PWM1, PWM2 so that
It can closely follow input current control commandI s *, then input current must be to reach control with the sine wave of phase with input voltage
The purpose of input power factor and low current distortion processed.
Switching damage is undermined with raising efficiency in order to reduce conducting, this converter is provided with three kinds of operating modes.Referring to Fig. 4,
Wherein in input voltage waveform | Vs | boost mode is operated in when far below output voltage Vd, in input voltage waveform | and Vs | in defeated
The grey voltage area gone out near voltage Vd then operates in falling-rising die pressing type, in input voltage waveform | Vs | it is far above output voltage
Decompression mode is operated in when Vd.This operating mode can obtain preferable efficiency reasons and be：(1) voltage reduction module switching tube Q1 only exists
Switch under decompression and falling-rising die pressing type, it reduces switching damage to be fully under boost mode.(2) Boost-Mode switch pipe Q2
Only switch under boosting and falling-rising die pressing type, it reduces switching and conducting damage to be completely switched off under decompression mode.(3) in falling-rising
Under die pressing type, switch Q1 and Q2 will not simultaneously turn on cut-off and exist as traditional lift converter energy need to be stored in inductance completely
Conversion, but the interactive action that is depressured and boosts, reduce inductive energy storage demand and electric current, reduce iron loss and conducting damage, promotion electricity
Road efficiency.
In order to automatically switch between three kinds of operating modes, two pulse width modulation circuits use different sawtooth waves.
Referring to Fig. 3, the anti-phase input termination one of the first pulse width modulation circuit PWM1 fixes sawtooth waveV t1 （V t1 By sawtooth wave
Generator automatically generates）, flow can shifted sawtooth always for the anti-phase input termination of the second pulse width modulation circuit PWM2
WaveV t2 .The DC quantity can shifted sawtooth waveV t2 For fixed sawtooth waveV t1 With a DC offsetV os Sum.The DC offsetV os Including preset fixed value offsetV os1 （V os1 For being set in the most lower limit of buck-boost mode at light load）It is inclined with float value
Shifting amountV os2 （It is setting the range of falling-rising die pressing type）, the float value offset Vos2 is by the error transfer factor signal Vea
A gain K is multiplied by be obtained, in underloading or high input voltage, Vos2 is lower value, otherwise in heavy duty or low input
Vos2 is high value.When Vos2 is lower value, Vt1 and Vt2 size waveforms overlapping areas are smaller, that is, the range of decompression mode is got over
Greatly, the switching times of switch Q2 are lower, and changing automatic reduce with operating point switches damage.
In order to become apparent from the work for illustrating foregoing circuit, the system that Fig. 5 establishes a 300W with software, exports 210Vdc is main
Circuit and control circuit are established according to above-mentioned principle.Input current wave corresponding with output voltage when Fig. 6 show circuit start
Shape figure, display output voltage can linearly be risen to the output voltage of setting by no-voltage.The input current of sensing can be tight
It is close to follow its current order, therefore the sine wave that the input current exchanged is low distortion.Fig. 7 and Fig. 8 be respectively displayed on decompression and
Work wave under boost mode, the sawtooth wave Vt1 and Vt2 of two pwm pulse width modulation circuits can also understand thus two
Figure is learnt, and generates the trigger signal of switch as shown in figure 9, may achieve mode shown in Fig. 4 really reduces the switching time of switch
Number and conducting damage.Final output waveform is as shown in Figures 10 and 11, either heavy duty or underloading can obtain high power because
Number and low distortion electric current.
Above example is by way of example only, non-to provide constraints.It is any without departing from the application spirit and scope, and to it
The equivalent modifications of progress or change, shall be included in the scope of claims of this application.
Claims (2)
1. a kind of single-phase falling-rising pressure type AC-DC converter, including sequentially connected diode rectifier and falling-rising voltage type transducer
Main circuit, falling-rising voltage type transducer main circuit include the voltage reduction module switching tube (Q1) for connecting diode rectifier output cathode
With the Boost-Mode switch pipe (Q2) of connection diode rectifier output negative pole, it is characterised in that further include：
Input voltage sense circuit is connected to the output end of diode rectifier, to sense input voltage signalK v V in ；
Input current sensing circuit, is connected in the output loop of diode rectifier, and defeated by being sensed after low-pass filter
Enter current signalK s I in ；
Output voltage sensing circuit connects the output end of this converter, to sense output voltage；
Master controller, according to the input voltage signal of sensingK v V in , input current signalK s I in It determines and turns with output voltage signal
Parallel operation works in decompression mode or boost mode or falling-rising die pressing type, controls the first and second pulse width modulation circuits respectively
（PWM1、PWM2）；
First pulse width modulation circuit（PWM1）, PWM switching signals are sent out under the control of master controller, make the decompression mould
Block switching tube (Q1) switches only under decompression and falling-rising die pressing type, is fully under boost mode；Second pulse width is modulated
Circuit（PWM2）, PWM switching signals are sent out under the control of master controller, and the Boost-Mode switch pipe (Q2) is made only to boost
And switches under falling-rising die pressing type, is completely switched off in buck mode；Under falling-rising die pressing type, voltage reduction module switching tube and boosting mould
Formula switching tube will not simultaneously turn on cut-off；
The output voltage that the master controller arrives output voltage sensing circuit senses and predeterminated voltage orderV d * It compares, the two
Error amount via voltage controllerG v Error transfer factor signal is obtained after adjustmentV ea , the error transfer factor signalV ea Again with the input
Voltage signalK v V in It is multiplied again divided by has multiplied regulation coefficientK 1 Input voltage signal square valueK 1 (K v V in )2, obtain input electricity
Flow control orderI s *, input current control commandI s *Subtract the input current signalK s I in By current error amplifierG CA
Pwm voltage signal is obtained after adjustmentV con , the pwm voltage signalV con It is conveyed to the first and second pulse widths simultaneously
Modulation circuit（PWM1、PWM2）In-phase input end；
First pulse width modulation circuit（PWM1）Anti-phase input termination one fix sawtooth waveV t1 , second pulse is wide
Spend modulation circuit（PWM2）Anti-phase input termination flow can shifted sawtooth wave alwaysV t2 , which can shifted sawtooth waveV t2
For fixed sawtooth waveV t1 With a DC offsetV os Sum, the DC offsetV os Including preset fixed value offsetV os1
With float value offsetV os2 , the float value offsetV os2 By the error transfer factor signalV ea It is multiplied by a gainKIt is obtained.
2. a kind of control method of single-phase falling-rising pressure type AC-DC converter, including sequentially connected diode rectifier and falling-rising
Voltage type transducer main circuit, falling-rising voltage type transducer main circuit include the voltage reduction module for connecting diode rectifier output cathode
Switching tube (Q1) and the Boost-Mode switch pipe (Q2) for connecting diode rectifier output negative pole, it is characterised in that：
The output end of diode rectifier is connected to input voltage sense circuit, to sense input voltage signalK v V in ；
It is connected in the output loop of diode rectifier with input current sensing circuit, and defeated by being sensed after low-pass filter
Enter current signalK s I in ；
The output end that this converter is connected with output voltage sensing circuit, to sense output voltage；
Master controller is according to the input voltage signal of sensingK v V in , input current signalK s I in It determines and converts with output voltage signal
Device works in decompression mode or boost mode or falling-rising die pressing type, controls the first and second pulse width modulation circuits respectively
（PWM1、PWM2）；
First pulse width modulation circuit（PWM1）, PWM switching signals are sent out under the control of master controller, make the decompression mould
Block switching tube (Q1) switches only under decompression and falling-rising die pressing type, is fully under boost mode；Second pulse width is modulated
Circuit（PWM2）, PWM switching signals are sent out under the control of master controller, and the Boost-Mode switch pipe (Q2) is made only to boost
And switches under falling-rising die pressing type, is completely switched off in buck mode；Under falling-rising die pressing type, voltage reduction module switching tube and boosting mould
Formula switching tube will not simultaneously turn on cut-off；
The output voltage that the master controller arrives output voltage sensing circuit senses and predeterminated voltage orderV d * It compares, the two
Error amount via voltage controllerG v Error transfer factor signal is obtained after adjustmentV ea , the error transfer factor signalV ea Again with the input
Voltage signalK v V in It is multiplied again divided by has multiplied regulation coefficientK 1 Input voltage signal square valueK 1 (K v V in )2, obtain input electricity
Flow control orderI s *, input current control commandI s *Subtract the input current signalK s I in By current error amplifierG CA
Pwm voltage signal is obtained after adjustmentV con , the pwm voltage signalV con It is conveyed to the first and second pulse widths simultaneously
Modulation circuit（PWM1、PWM2）In-phase input end；
First pulse width modulation circuit（PWM1）Anti-phase input termination one fix sawtooth waveV t1 , second pulse is wide
Spend modulation circuit（PWM2）Anti-phase input termination flow can shifted sawtooth wave alwaysV t2 , which can shifted sawtooth waveV t2
For fixed sawtooth waveV t1 With a DC offsetV os Sum, the DC offsetV os Including preset fixed value offsetV os1
With float value offsetV os2 , the float value offsetV os2 By the error transfer factor signalV ea It is multiplied by a gainKIt is obtained.
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|---|---|---|---|---|
| US5602463A (en) * | 1995-12-11 | 1997-02-11 | Lockheed Martin Corporation | DC power supply with enhanced input power factor using a buck and boost converter |
| CN102882371A (en) * | 2011-03-08 | 2013-01-16 | 英特赛尔美国有限公司 | High efficiency pfm control for buck-boost converter |
| CN105141133A (en) * | 2015-10-26 | 2015-12-09 | 南京信息工程大学 | MIT model reference adaptive control method for double-tube type booster and buck converter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5602463A (en) * | 1995-12-11 | 1997-02-11 | Lockheed Martin Corporation | DC power supply with enhanced input power factor using a buck and boost converter |
| CN102882371A (en) * | 2011-03-08 | 2013-01-16 | 英特赛尔美国有限公司 | High efficiency pfm control for buck-boost converter |
| CN105141133A (en) * | 2015-10-26 | 2015-12-09 | 南京信息工程大学 | MIT model reference adaptive control method for double-tube type booster and buck converter |
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