CN106533210A - Single-phase buck-boost AC-DC converter and control method thereof - Google Patents

Single-phase buck-boost AC-DC converter and control method thereof Download PDF

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Publication number
CN106533210A
CN106533210A CN201611065239.2A CN201611065239A CN106533210A CN 106533210 A CN106533210 A CN 106533210A CN 201611065239 A CN201611065239 A CN 201611065239A CN 106533210 A CN106533210 A CN 106533210A
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China
Prior art keywords
voltage
input
boost
falling
mode
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CN201611065239.2A
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CN106533210B (en
Inventor
李光
吴国军
梅欢欢
吴国勇
余蓓
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Shenzhen Top Leather Technology Co Ltd
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Shenzhen Top Leather Technology Co Ltd
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion 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
    • H02M7/21Conversion 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
    • H02M7/217Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/156Conversion 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
    • H02M3/158Conversion 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
    • H02M3/1582Buck-boost converters

Abstract

The invention discloses a single-phase buck-boost AC-DC converter and a control method thereof. The single-phase buck-boost AC-DC converter comprises a diode rectifier and a buck-boost converter main circuit which are connected, wherein the buck-boost converter main circuit comprises a buck module switch and a boost mode switch; and a master controller determines converter working modes according to an input voltage signal, an input current signal and an output voltage signal, controls the buck module switch to be switched only in a buck mode and a buck-boost mode and to be completely conducted in a boost mode, and controls the boost mode switch to be switched only in the boost mode and the buck-boost mode and to be completely cut off in the buck mode. The single-phase buck-boost AC-DC converter has the advantages that the surge current is reduced, the conversion efficiency is improved, conduction losses and switching losses of the switches are reduced, the input voltage range is wide, the response of a voltage circuit does not change along with the change of input voltage, a good dynamic response is maintained in a full-voltage range, and meanwhile, the targets of a high power factor and a good voltage regulation rate are achieved.

Description

A kind of single-phase falling-rising pressure type AC-DC converter and its control method
Technical field
The present invention relates to transducer, more particularly to a kind of single-phase falling-rising pressure AC-DC formulas transducer and its control method.
Background technology
Boost type AC to DC converter is the most frequently used front stage circuits to do switched-mode power supply(As shown in Figure 1), use To provide the function of adjustment input power factor (PFC), circuit is made to possess High Power Factor and input current low distortion.But When boost type AC to DC converter starts, input voltage directly can charge to the bulky capacitor of outfan, cause larger surging Electric current (Inrush current), secondly output voltage necessarily be 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 this problem in the industry using falling-rising voltage type transducer as shown in Figure 2, input voltage will not be straight on startup for this circuit Connect and output capacitance is charged, without current problems of surging, its secondary circuit can be adapted to the application of global general-use input voltage with buck Require;But this circuit possesses compared with multicompartment compared with conventional boost formula circuit, generally believe that its efficiency is poor, next inductance is also It is non-positioned at input side, it is difficult to directly control this electric current and reach the purpose for making input current and involving for sine low distortion.
The content of the invention
The present invention is to solve the defect such as electric current of surging in prior art is larger, efficiency is poor, component is more, proposes a kind of Single-phase falling-rising pressure type AC-DC converter and its control method.
To solve above-mentioned technical problem, technical scheme proposed by the present invention is that a kind of single-phase falling-rising pressure type AC-DC of design turns Parallel operation, including the diode rectifier and falling-rising voltage type transducer main circuit that are sequentially connected, in falling-rising voltage type transducer main circuit Including the liter pressing mold of the voltage reduction module switch and connection diode rectifier output negative pole of connection diode rectifier output cathode Formula is switched, and which also includes:Input voltage sense circuit, is connected to the outfan of diode rectifier, to sense input voltage Signal;Input current sensing circuit, is connected in the output loop of diode rectifier, and is sensed after low pass filter defeated Enter current signal;Output voltage sensing circuit, connects the outfan of this transducer, to sense output voltage;Master controller, root Determine that transducer works in decompression mode or liter according to the input voltage signal of sensing, input current signal and output voltage signal Die pressing type or falling-rising die pressing type, control the first and second pulse width modulation circuits respectively;First pulse width modulation circuit, PWM switching signals are sent under the control of master controller, the voltage reduction module is switched only in blood pressure lowering and falling-rising die pressing type incision Change, it is fully under boost mode;Second pulse width modulation circuit, sends PWM switching letters under the control of master controller Number, make the Boost-Mode switch only boosting and falling-rising die pressing type under switching, it is completely switched off in buck mode;In falling-rising pressure Under pattern, voltage reduction module switch and Boost-Mode switch will not simultaneously turn on cut-off.Output voltage is sensed by above-mentioned master controller Circuits sense to output voltage compare with predeterminated voltage order, both error amount is via obtaining after voltage controller adjustment Error transfer factor signal, the error transfer factor signal are multiplied with the input voltage signal again again divided by the input electricity for having taken advantage of regulation coefficient The square value of pressure signal, obtains input current control command, and input current control command deducts Jing after the input current signal Pwm voltage signal is obtained after current error amplifier adjustment, the pwm voltage signal is conveyed to first and second simultaneously The in-phase input end of pulse width modulation circuit.The anti-phase input termination one of above-mentioned first pulse width modulation circuit fixes sawtooth Ripple, the anti-phase input termination of second pulse width modulation circuit always flow can shifted sawtooth ripple, the DC quantity can offset Sawtooth waveforms be fix sawtooth waveforms and a DC offset and, the DC offset includes default fixed value side-play amount and floating Dynamic value side-play amount, the float value side-play amount are multiplied by a gain by the error transfer factor signalKObtained.
The present invention have also been devised a kind of control method of single-phase falling-rising pressure type AC-DC converter, including being sequentially connected two poles Pipe commutator and falling-rising voltage type transducer main circuit, falling-rising voltage type transducer main circuit include connecting diode rectifier output The Boost-Mode switch of the voltage reduction module switch and connection diode rectifier output negative pole of positive pole, which includes:Use input voltage Sensing circuit is connected to the outfan of diode rectifier, to sense input voltage signal;Connected with input current sensing circuit In the output loop of diode rectifier, and input current signal is sensed after low pass filter;Sensed with output voltage Circuit connects the outfan of this transducer, to sense output voltage;Input voltage signal, input electricity of the master controller according to sensing Stream signal and output voltage signal determine that transducer works in decompression mode or boost mode or falling-rising die pressing type, control respectively First and second pulse width modulation circuits;First pulse width modulation circuit, sends PWM switchings under the control of master controller Signal, makes the switching, fully under boost mode only under blood pressure lowering and falling-rising die pressing type of voltage reduction module switch;Second arteries and veins Rush width modulation circuit, PWM switching signals sent under the control of master controller, make the Boost-Mode switch only boosting and Under falling-rising die pressing type switching, it is completely switched off in buck mode;Under falling-rising die pressing type, voltage reduction module switch and boost mode are opened Pass will not simultaneously turn on cut-off.The output voltage that output voltage sensing circuit senses are arrived by above-mentioned master controller is ordered with predeterminated voltage Order is compared, both error amount via obtaining error transfer factor signal after voltage controller adjustment, the error transfer factor signal again with The square value that the input voltage signal is multiplied again divided by the input voltage signal for having taken advantage of regulation coefficient, obtains input current control Order, input current control command obtain PWM controls after deducting the input current signal Jing after current error amplifier adjustment Voltage signal, the pwm voltage signal are conveyed to the in-phase input end of the first and second pulse width modulation circuits simultaneously.On State the first pulse width modulation circuit anti-phase input termination one fix sawtooth waveforms, second pulse width modulation circuit it is anti- Mutually input termination always flow can shifted sawtooth ripple, the DC quantity can shifted sawtooth ripple be fixed sawtooth waveforms and a DC offset Sum, the DC offset includes default fixed value side-play amount and float value side-play amount, and the float value side-play amount is by institute State error transfer factor signal and be multiplied by a gainKObtained.
Compared with prior art, the present invention can change its mode of operation according to input voltage and load, in falling-rising Switch in die pressing type, boost mode and falling-rising die pressing type these three mode of operations, with reduction surge electric current, improve conversion effect The advantage that rate, the conducting damage for reducing switch and switching are damaged, wide input voltage range, the response of voltage circuit will not be with input voltage Change and change, be in full voltage range and maintain good dynamic response, and while reach high work(factor and good electricity The purpose of pressure 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;
Circuit diagrams of the Fig. 3 for present pre-ferred embodiments;
Fig. 4 is transducer mode of operation and switch switching waveform compares figure;
Fig. 5 simulates the proof diagram of Fig. 3 for software;
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 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 with;
Figure 11 is the response diagram under 230Vac input voltages and 60W underloadings.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, 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 converter, referring to Fig. 3, which is included from the beginning of alternating voltage The electromagnetic interface filter diode rectifier being sequentially connected and falling-rising voltage type transducer main circuit.The wherein main electricity of falling-rising voltage type transducer Road includes the voltage reduction module switch Q1 for connecting diode rectifier output cathode and connects diode rectifier output negative pole Boost-Mode switch Q2.Transducer also includes input voltage sense circuit, and which is connected to the cathode output end of diode rectifier, Through voltage sensing ratioK v Conversion obtain input voltage signalK v V in ;Also include input current sensing circuit, which is connected to two In the output loop negative electrode bus of pole pipe commutator, and input current signal is sensed after low pass filterK s I in (In figureI s =K s I in );Also include output voltage sensing circuit, which connects the outfan of this transducer, to sense output voltage;Also include total Controller, its input voltage signal according to sensingK v V in , input current signalK s I in Transducer is determined with output voltage signal Work in decompression mode or boost mode or falling-rising die pressing type.The selection of these three patterns, is to be controlled by master controller respectively First and second pulse width modulation circuits(PWM1、PWM2), and then control voltage reduction module switch Q1 and Boost-Mode switch Q2 Combination switching realizing.First pulse width modulation circuit PWM1, sends PWM switching letters under the control of master controller Number, voltage reduction module switch Q1 is switched only under blood pressure lowering and falling-rising die pressing type, fully under boost mode;Second arteries and veins Width modulation circuit PWM2 is rushed, PWM switching signals are sent under the control of master controller, make the Boost-Mode switch Q2 only exist Boosting and falling-rising die pressing type under switching, it is completely switched off in buck mode;Under falling-rising die pressing type, voltage reduction module is switched and is boosted Mode switch will not simultaneously turn on cut-off.
Referring to Fig. 3, in the preferred embodiment, the output voltage that output voltage sensing circuit senses are arrived by the master controller With predeterminated voltage orderV d * Compare(Predeterminated voltage bid value deducts output voltage values), both error amounts are via voltage control 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 is removed again WithK 1 (K v V in )2Obtain input current control commandI s *, whereinK 1 (K v V in )2Square value for input voltage signal has taken advantage of adjustment CoefficientK 1 , input current control commandI s *Deduct 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 through the purpose of low pass filter be to try to achieve it is defeated The average current for entering, this average current is through current error amplifier(G CA ), a Current Feedback Control is formed after PWM1, PWM2 Loop so which can closely follow input current control commandI s *, then input current must be the sine with input voltage homophase Ripple, 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 transducer is provided with three kinds of mode of operations.Referring to Fig. 4, Wherein boost mode is operated in when input voltage waveform | Vs | is far below output voltage Vd, in input voltage waveform | Vs | in defeated The Lycoperdon polymorphum Vitt voltage area gone out near voltage Vd then operates in falling-rising die pressing type, in input voltage waveform | Vs | far above output voltage Decompression mode is operated in during Vd.This mode of operation can obtain preferable efficiency reasons:(1) voltage reduction module switch Q1 is only in drop Pressure and falling-rising die pressing type under switch, under boost mode its be it is fully on reduce switching damage.(2) Boost-Mode switch Q2 only exists Switch under boosting and falling-rising die pressing type, under decompression mode, which is completely switched off to reduce switching and turning on damage.(3) in falling-rising pressing mold Under formula, switch Q1 and Q2 will not simultaneously turn on cut-off and turn as traditional lift converter energy need to be stored in inductance completely Change, but blood pressure lowering and boosting interactive action, inductive energy storage demand and electric current are reduced, iron loss is reduced and conducting is damaged, lift circuit Efficiency.
In order to automatically switch between three kinds of mode of operations, two pulse width modulation circuits adopt different sawtooth waveforms. Referring to Fig. 3, the anti-phase input termination one of the first pulse width modulation circuit PWM1 fixes sawtooth waveformsV t1 V t1 By sawtooth waveforms Generator is automatically generated), flow can shifted sawtooth always for the anti-phase input termination of the second pulse width modulation circuit PWM2 RippleV t2 .The DC quantity can shifted sawtooth rippleV t2 For fixed sawtooth waveformsV t1 With a DC offsetV os Sum.The DC offsetV os Comprising default fixed value side-play amountV os1 V os1 The lower limit of buck-boost mode during for being set in most underloading)It is inclined with float value Shifting amountV os2 (Its scope to set falling-rising die pressing type).Float value side-play amount Vos2 is by the error transfer factor signal Vea It is multiplied by a gain K to 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 less, that is, the scope of decompression mode is got over Greatly, the switching times for switching Q2 are lower, to change reduce automatically to switch with operating point and damage.
In order to become apparent from illustrating the work of foregoing circuit, the system that Fig. 5 sets up a 300W, output 210Vdc with software is main Circuit and control circuit are set up according to above-mentioned principle.Input current ripple corresponding with output voltage when Fig. 6 show circuit start Shape figure, its display output voltage can linearly be risen to the output voltage of setting by no-voltage.The input current of sensing can be tight Close its current order, therefore the input current for exchanging of following is for the sine wave of low distortion.Fig. 7 and Fig. 8 be respectively displayed on blood pressure lowering and Work wave under boost mode, the sawtooth waveforms Vt1 and Vt2 of two pwm pulse width modulation circuits can also understand thus two Figure is learnt, and produces the trigger of switch as shown in figure 9, the mode that may achieve shown in Fig. 4 really reduces the switching time for switching Number and conducting are damaged.Final output waveform 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 method of single-phase falling-rising pressure type AC-DC converter, whole including diode is sequentially connected Stream device and falling-rising voltage type transducer main circuit, falling-rising voltage type transducer main circuit include connecting diode rectifier output cathode Voltage reduction module switch Q1 and connection diode rectifier output negative pole Boost-Mode switch Q2, which also includes:With input electricity Pressure sensitivity slowdown monitoring circuit is connected to the outfan of diode rectifier, to sense input voltage signalK v V in ;With input current sensing electricity Road is connected in the output loop of diode rectifier, and input current signal is sensed after low pass filterK s I in ;With defeated Go out the outfan that voltage sensing circuit connects this transducer, to sense output voltage;Input voltage of the master controller according to sensing SignalK v V in , input current signalK s I in With output voltage signal determine transducer work 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, sends PWM switching signals under the control of master controller, makes the voltage reduction module switch Q1 only in blood pressure lowering and falling-rising pressing mold Under formula switching, it is fully under boost mode;Second pulse width modulation circuit PWM2, sends under the control of master controller PWM switching signals, make the Boost-Mode switch Q2 only switch under boosting and falling-rising die pressing type, cut completely in buck mode Only;Under falling-rising die pressing type, voltage reduction module switch and Boost-Mode switch will not simultaneously turn on cut-off.
Referring to Fig. 3, in the preferred embodiment, the output voltage that output voltage sensing circuit senses are arrived by above-mentioned master controller With predeterminated voltage orderV d * Compare(Predeterminated voltage bid value deducts output voltage values), both error amounts are via voltage control 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 is removed again To have taken advantage of 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 *Deduct the input current signalK s I in By current error amplifierG CA PWM control electricity is obtained after adjustment Pressure 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 the average electricity tried to achieve by input through the purpose of low pass filter Stream, this average current is through current error amplifier(G CA ), a current feedback control loop is formed after PWM1, PWM2 so that Which can closely follow input current control commandI s *, then input current must be the sine wave with input voltage homophase, reach control Input power factor processed and the purpose of low current distortion.
Switching damage is undermined with raising efficiency in order to reduce conducting, this transducer is provided with three kinds of mode of operations.Referring to Fig. 4, Wherein boost mode is operated in when input voltage waveform | Vs | is far below output voltage Vd, in input voltage waveform | Vs | in defeated The Lycoperdon polymorphum Vitt voltage area gone out near voltage Vd then operates in falling-rising die pressing type, in input voltage waveform | Vs | far above output voltage Decompression mode is operated in during Vd.This mode of operation can obtain preferable efficiency reasons:(1) voltage reduction module switch Q1 is only in drop Pressure and falling-rising die pressing type under switch, under boost mode its be it is fully on reduce switching damage.(2) Boost-Mode switch Q2 only exists Switch under boosting and falling-rising die pressing type, under decompression mode, which is completely switched off to reduce switching and turning on damage.(3) in falling-rising pressing mold Under formula, switch Q1 and Q2 will not simultaneously turn on cut-off and turn as traditional lift converter energy need to be stored in inductance completely Change, but blood pressure lowering and boosting interactive action, inductive energy storage demand and electric current are reduced, iron loss is reduced and conducting is damaged, lift circuit Efficiency.
In order to automatically switch between three kinds of mode of operations, two pulse width modulation circuits adopt different sawtooth waveforms. Referring to Fig. 3, the anti-phase input termination one of the first pulse width modulation circuit PWM1 fixes sawtooth waveformsV t1 V t1 By sawtooth waveforms Generator is automatically generated), flow can shifted sawtooth always for the anti-phase input termination of the second pulse width modulation circuit PWM2 RippleV t2 .The DC quantity can shifted sawtooth rippleV t2 For fixed sawtooth waveformsV t1 With a DC offsetV os Sum.The DC offsetV os Comprising default fixed value side-play amountV os1 V os1 The lower limit of buck-boost mode during for being set in most underloading)It is inclined with float value Shifting amountV os2 (Its scope to set falling-rising die pressing type), float value side-play amount Vos2 is by the error transfer factor signal Vea It is multiplied by a gain K to 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 less, that is, the scope of decompression mode is got over Greatly, the switching times for switching Q2 are lower, to change reduce automatically to switch with operating point and damage.
In order to become apparent from illustrating the work of foregoing circuit, the system that Fig. 5 sets up a 300W, output 210Vdc with software is main Circuit and control circuit are set up according to above-mentioned principle.Input current ripple corresponding with output voltage when Fig. 6 show circuit start Shape figure, its display output voltage can linearly be risen to the output voltage of setting by no-voltage.The input current of sensing can be tight Close its current order, therefore the input current for exchanging of following is for the sine wave of low distortion.Fig. 7 and Fig. 8 be respectively displayed on blood pressure lowering and Work wave under boost mode, the sawtooth waveforms Vt1 and Vt2 of two pwm pulse width modulation circuits can also understand thus two Figure is learnt, and produces the trigger of switch as shown in figure 9, the mode that may achieve shown in Fig. 4 really reduces the switching time for switching Number and conducting are damaged.Final output waveform 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 which The equivalent modifications for carrying out or change, among being intended to be limited solely by claims hereof scope.

Claims (6)

1. a kind of single-phase falling-rising pressure type AC-DC converter, including the diode rectifier and falling-rising voltage type transducer that are sequentially connected Main circuit, falling-rising voltage type transducer main circuit include connect diode rectifier output cathode voltage reduction module switch (Q1) and The Boost-Mode switch (Q2) of connection diode rectifier output negative pole, it is characterised in that also include:
Input voltage sense circuit, is connected to the outfan of diode rectifier, to sense input voltage signal (K v V in );
Input current sensing circuit, is connected in the output loop of diode rectifier, and is sensed after low pass filter defeated Enter current signal (K s I in );
Output voltage sensing circuit, connects the outfan of this transducer, to sense output voltage;
Master controller, according to sensing input voltage signal (K v V in ), input current signal (K s I in ) and output voltage signal it is true Determine transducer and work in decompression mode or boost mode or falling-rising die pressing type, control the first and second pulse width modulations respectively Circuit(PWM1、PWM2);
First pulse width modulation circuit(PWM1), PWM switching signals are sent under the control of master controller, the blood pressure lowering mould is made Block switch (Q1) only under blood pressure lowering and falling-rising die pressing type switching, it is fully under boost mode;Second pulse width modulation electricity Road(PWM2), PWM switching signals are sent under the control of master controller, the Boost-Mode switch (Q2) are made only in boosting and are dropped Under boost mode switching, it is completely switched off in buck mode;Under falling-rising die pressing type, voltage reduction module is switched and Boost-Mode switch Cut-off will not be simultaneously turned on.
2. single-phase falling-rising pressure type AC-DC converter as claimed in claim 1, it is characterised in that:The master controller will be exported Output voltage that voltage sensing circuit is sensed and predeterminated voltage order (V d * ) compare, both error amounts are via voltage control Device (G v ) obtain after adjustment error transfer factor signal (V ea ), the error transfer factor signal (V ea ) again with the input voltage signal (K v V in ) It is multiplied again divided by having taken advantage of regulation coefficient(K 1 )Input voltage signal square value (K 1 (K v V in )2), obtain input current control life Make (I s *), input current control command (I s *) deduct the input current signal (K s I in ) by current error amplifier (G CA ) Pwm voltage signal is obtained after adjustment(V con ), the pwm voltage signal(V con )It is conveyed to the first and second pulses simultaneously Width modulation circuit(PWM1、PWM2)In-phase input end.
3. single-phase falling-rising pressure type AC-DC converter as claimed in claim 2, it is characterised in that:First pulse width is adjusted Circuit processed(PWM1)Anti-phase input termination one fix sawtooth waveforms (V t1 ), second pulse width modulation circuit(PWM2)It is anti- Mutually input termination always flow can shifted sawtooth ripple (V t2 ), the DC quantity can shifted sawtooth ripple (V t2 ) for fixed sawtooth waveforms (V t1 ) With a DC offset(V os )Sum, the DC offset(V os )Comprising default fixed value side-play amount(V os1 )And float value Side-play amount(V os2 ), the float value side-play amount(V os2 )By the error transfer factor signal (V ea ) it is multiplied by a gainKObtained.
4. a kind of control method of single-phase falling-rising pressure type AC-DC converter, including being sequentially connected diode rectifier and falling-rising pressure Formula transducer main circuit, falling-rising voltage type transducer main circuit include that the voltage reduction module for connecting diode rectifier output cathode is opened Close the Boost-Mode switch (Q2) of (Q1) and connection diode rectifier output negative pole, it is characterised in that:
The outfan of diode rectifier is connected to input voltage sense circuit, with sense input voltage signal (K v V in );
It is connected in the output loop of diode rectifier with input current sensing circuit, and is sensed after low pass filter defeated Enter current signal (K s I in );
Connect the outfan of this transducer with output voltage sensing circuit, to sense output voltage;
Master controller according to sensing input voltage signal (K v V in ), input current signal (K s I in ) and output voltage signal determination Transducer works in decompression mode or boost mode or falling-rising die pressing type, controls the first and second pulse width modulations electricity respectively Road(PWM1、PWM2);
First pulse width modulation circuit(PWM1), PWM switching signals are sent under the control of master controller, the blood pressure lowering mould is made Block switch (Q1) only under blood pressure lowering and falling-rising die pressing type switching, it is fully under boost mode;Second pulse width modulation electricity Road(PWM2), PWM switching signals are sent under the control of master controller, the Boost-Mode switch (Q2) are made only in boosting and are dropped Under boost mode switching, it is completely switched off in buck mode;Under falling-rising die pressing type, voltage reduction module is switched and Boost-Mode switch Cut-off will not be simultaneously turned on.
5. the control method of single-phase falling-rising pressure type AC-DC converter as claimed in claim 4, it is characterised in that:The master control Output voltage that output voltage sensing circuit senses are arrived by device processed and predeterminated voltage order (V d * ) compare, both error amount Jing By voltage controller (G v ) obtain after adjustment error transfer factor signal (V ea ), the error transfer factor signal (V ea ) again with the input voltage Signal (K v V in ) be multiplied again divided by having taken advantage of regulation coefficient(K 1 )Input voltage signal square value (K 1 (K v V in )2), it is input into Current control order (I s *), input current control command (I s *) deduct the input current signal (K s I in ) by current error Amplifier (G CA ) pwm voltage signal is obtained after adjustment(V con ), the pwm voltage signal(V con )It is conveyed to first simultaneously With the second pulse width modulation circuit(PWM1、PWM2)In-phase input end.
6. the control method of single-phase falling-rising pressure type AC-DC converter as claimed in claim 5, it is characterised in that:Described first Pulse width modulation circuit(PWM1)Anti-phase input termination one fix sawtooth waveforms (V t1 ), second pulse width modulation circuit (PWM2)Anti-phase input termination always flow can shifted sawtooth ripple (V t2 ), the DC quantity can shifted sawtooth ripple (V t2 ) for fixation Sawtooth waveforms (V t1 ) and a DC offset(V os )Sum, the DC offset(V os )Comprising default fixed value side-play amount (V os1 )With float value side-play amount(V os2 ), the float value side-play amount(V os2 )By the error transfer factor signal (V ea ) it is multiplied by an increasing BenefitKObtained.
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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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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
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