CN105186854B - Digitlization PFC acquisition control system and method based on DSP - Google Patents

Digitlization PFC acquisition control system and method based on DSP Download PDF

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Publication number
CN105186854B
CN105186854B CN201510655694.7A CN201510655694A CN105186854B CN 105186854 B CN105186854 B CN 105186854B CN 201510655694 A CN201510655694 A CN 201510655694A CN 105186854 B CN105186854 B CN 105186854B
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China
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signal
dsp
unit
pfc
control unit
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CN201510655694.7A
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Chinese (zh)
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CN105186854A (en
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丁绪星
王宸
黄薛龙
王兵兵
崔婷玉
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安徽师范大学
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion
    • Y02B70/12Power factor correction technologies for power supplies
    • Y02B70/126Active technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy
    • Y02P80/11Efficient use of energy of electric energy
    • Y02P80/112Power supplies with power electronics for efficient use of energy, e.g. power factor correction [PFC] or resonant converters

Abstract

The invention discloses a kind of digitlization PFC acquisition control system and method based on DSP, belong to power technique fields, acquisition control system includes signal acquisition unit, amplifying unit, DSP control unit and driving unit, the output end of signal acquisition unit connection pfc circuit is used to acquire the output signal of pfc circuit, signal acquisition unit connects amplifying unit and carries out signal filter amplifying processing to the signal of acquisition, filter and amplification unit connects DSP control unit, DSP control unit connects acquisition unit and driving unit, driving unit connects the on-off of the main switch of pfc circuit and the instruction control main switch according to DSP control unit.The present invention solves the problems, such as that pfc circuit component is easy to aging, control method is backward, transfer efficiency is low, has the advantages that total digitalization processing, simplifies pfc circuit design, high conversion efficiency, improves service life and substantially reduce cost, be suitable for mass production.

Description

Digitlization PFC acquisition control system and method based on DSP

Technical field

The invention belongs to power technique fields, and in particular to a kind of digitlization PFC acquisition control system and side based on DSP Method.

Background technique

The full name in English of PFC be " Power Factor Correction ", mean " PFC ", power because Number refers to relationships between effective power and total power consumption (apparent energy), that is, effective power divided by total power consumption (depending on In power) ratio.Substantially power factor can measure the degree that electric power is used effectively, when power factor value is bigger, generation Its electric power utilization rate of table is higher.Power factor is the parameter for measuring electrical equipment power consumption efficiency, and low power factor represents low Electric power efficiency.PFC is known as in order to improve the technology of electrical equipment power factor.

Pfc circuit in the market is mainly designed using analogy method, and there are components, and easy to aging, control method is fallen Afterwards, the disadvantages such as transfer efficiency is low, while that there are sampling precisions is low, A/D conversion rate is slow, periphery for the control of pfc circuit digital collection The problems such as circuit is lengthy and jumbled seriously hinders the development of pfc circuit technology.

Summary of the invention

According to the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to propose a kind of number based on DSP Word PFC acquisition control system and method realize the total digitalization processing to pfc circuit acquisition control by dsp chip, greatly Pfc circuit design is simplified greatly, solves the problems, such as that pfc circuit component is easy to aging, control method is backward, transfer efficiency is low, Have the advantages that total digitalization processing, simplify pfc circuit design, high conversion efficiency, improves service life and substantially reduce into This, is suitable for mass production.

In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of digitlization PFC based on DSP is adopted Collect control system, the digitlization PFC acquisition control system is connected to the rectification filter circuit output end and main switch of pfc circuit Between pipe, digitlization PFC acquisition control system includes signal acquisition unit, amplifying unit, DSP control unit and driving unit, The output end that the input terminal of signal acquisition unit is connected to pfc circuit is used to acquire the output signal of pfc circuit, signal acquisition list The input terminal of the output end connection filter and amplification unit of member carries out signal filtering by signal of the filter and amplification unit to acquisition and puts Big processing, the input terminal and the signal after input processing of the output end connection DSP control unit of filter and amplification unit are controlled to DSP Unit carries out signal judgement, and the output end connection acquisition unit and driving unit of DSP control unit, DSP control unit is according to defeated Enter the sampling rate that signal output order changes acquisition unit to acquisition unit and driving unit control, driving unit connects PFC The on-off of the main switch of circuit and the instruction control main switch according to DSP control unit.

In above system, filter and amplifying circuit are equipped in the amplifying unit, the input interface connection of filter is adopted The input terminal of collection unit is used to filter out the clutter in acquisition signal, the output interface connection amplifying circuit and input signal of filter The amplified signal into amplifying circuit.Comparand register and reference voltage value are equipped in the DSP control unit, comparand register will The signal of reference voltage value and input dsp controller carries out data comparison.D/A converting circuit is equipped in the DSP control unit And threshold value, D/A converting circuit to the signal of input carry out digital-to-analogue conversion and logarithmic mode conversion digital signal result and threshold value into Row multilevel iudge.The pfc circuit includes that rectifier bridge, filtering booster circuit, main switch, current rectifying and wave filtering circuit and relay turn Change circuit, voltage input bridge, by filtering booster circuit, main switch, current rectifying and wave filtering circuit, relay conversion circuit, Output extremely connects the secondary circuit of relay conversion circuit.

A kind of digitlization PFC collection control method based on DSP, the method step includes: Step 1: being adopted by signal Collect unit and acquires PFC output voltage U0Signal value, the voltage signal of acquisition passes through filter amplifying processing, obtains output signal Um;Step 2: Um is input in corresponding DSP control unit comparand register, while according to Um size to signal acquisition list The use rate of member is controlled, and the reference voltage Ut set of the acquisition signal Um and DSP in comparand register is compared, Judge whether Um is more than or equal to Ut;Step 3: DSP terminates output signal, and DSP, which is terminated, generates PWM if Um is more than or equal to Ut Wave, pfc circuit stop working;Step 4: if Um be less than Ut, DSP control unit according to algorithm to error information at Reason, DSP control unit adjust sampling algorithm, change sampling interval and sampling rate.Step 5: calculating signal value Um and with reference to electricity Whether the error signal St of pressure value Ut, error in judgement signal St are less than threshold value δ;Step 6: if error signal St is less than or equal to Threshold value δ, then DSP control unit terminates output, if error signal is greater than threshold value δ, adjusts modified PI algorithm, changes DSP Output signal, the sampling rate of adjustment signal acquisition unit.

In the above method, the method includes digital collection methods: by signal acquisition unit to PFC output signal into Row signal acquisition is amplified through wave filter filtering clutter, then to the signal, is input in DSP control unit, if Um is greater than Equal to Ut, pfc circuit stops working;If being obtained conversely, DSP control unit carries out digital-to-analogue conversion to sampled signal according to sampled value To accurate digital signal, and according to the sampling rate of sampling algorithm real-time control signal acquisition unit and sampled point interval.Institute The method of stating includes digitalization control method: presetting reference voltage Ut and threshold value δ according to actual needs, works as DSP control unit Sampled signal Um is obtained, if | Ut-Um |≤δ, DSP, which are terminated, generates driving signal, if | Ut-Um | > δ, by Um and comparand register In reference voltage Ut comparison, obtain error signal St, according to the size of St, modify the transmission function in modified PI algorithm, The number of iterations and target final value are regulated and controled, the drive signal duty cycle of output driving unit is changed.PI is calculated in the method The formula of method transmission function are as follows:K is proportionality coefficient, T in formulaiFor the time of integration.δ system Setting permissible value.DSP control unit converts digital signals into analog drive signal automatically in the method step 6, generates The PWM drive waveforms of one controllable duty ratio, are handled through driving unit, are converted to the signal for being switched on or off main switch, The running of main switch is driven to control pfc circuit output.

The medicine have the advantages that 1. realize the total digitalization processing to pfc circuit acquisition control by dsp chip, The circuit design for enormously simplifying PFC improves service life and substantially reduces cost, is suitable for mass production.2. improving PFC The working efficiency of circuit and the precision of acquisition, the conversion between digital signal and analog signal is also more quickly and efficiently.3. real Now to the real-time adjusting and control of driving signal, output voltage, stablizes output, protect secondary circuit.4. joined system permission Value optimizes the transmission function of PI algorithm, and DSP carries out real-time control using improved PI algorithm, realizes to PFC regulative mode more Add flexible and convenient.

Detailed description of the invention

Content expressed by this specification attached drawing and the label in figure are briefly described below:

Fig. 1 is the work structuring block diagram of the acquisition control system of a specific embodiment of the invention;

Fig. 2 is the DSP sampling flow chart of a specific embodiment of the invention;

Fig. 3 is the DSP control flow chart of a specific embodiment of the invention.

Specific embodiment

Below against attached drawing, by the description of the embodiment, for example related each component of a specific embodiment of the invention Shape, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle, manufacturing process and Operate with method etc., is described in further detail, to help those skilled in the art to inventive concept of the invention, technology Scheme has more complete, accurate and deep understanding.

A kind of digitlization PFC acquisition control system based on DSP, as shown in Figure 1, digitlization PFC acquisition control system connects Connect between the rectification filter circuit output end and main switch of pfc circuit, pfc circuit include rectifier bridge, filtering booster circuit, Main switch, current rectifying and wave filtering circuit and relay conversion circuit, 220V line voltage input rectifying bridge, by filtering boosting electricity Road, main switch, current rectifying and wave filtering circuit, relay conversion circuit, output to the secondary circuit for connecting relay conversion circuit.Number Word PFC acquisition control system is connected between the rectification filter circuit output end of pfc circuit and main switch, acquisition PFC electricity The output voltage signal on road simultaneously carries out sampled voltage judgement, and DSP control unit opens pfc circuit transfer change owner according to sampled result The sampling rate for closing pipe and acquisition control system carries out on-off control and self regulating and control.

Digitlization PFC acquisition control system includes signal acquisition unit, amplifying unit, DSP control unit and driving unit, Signal acquisition unit connects current rectifying and wave filtering circuit, amplifying unit connection signal acquisition unit, and DSP control unit connects amplifying unit And signal acquisition unit, driving unit connect main switch.The input terminal of signal acquisition unit is connected to the output end of pfc circuit For acquiring the output signal of pfc circuit, the input terminal of the output end connection filter and amplification unit of signal acquisition unit is through filtering Wave amplifying unit carries out signal filter amplifying processing to the signal of acquisition, and the output end connection DSP control of filter and amplification unit is single The input terminal of the member and signal after input processing carries out signal judgement to DSP control unit, the output end of DSP control unit connects Acquisition unit and driving unit, DSP control unit change according to input signal output order to acquisition unit and driving unit control Become the sampling rate of acquisition unit, driving unit connects the main switch of pfc circuit and controls according to the instruction of DSP control unit The on-off of main switch.

Filter and amplifying circuit are equipped in amplifying unit, the input terminal of the input interface connection acquisition unit of filter is used Come filter out acquisition signal in clutter, filter output interface connection amplifying circuit and input signal amplify into amplifying circuit Signal.The output signal of signal acquisition unit is input in amplifying unit progress signal filter amplifying processing, treated signal It is input in DSP control unit.Comparand register, reference voltage value, D/A converting circuit and threshold are equipped in DSP control unit The signal of reference voltage value and input dsp controller is carried out data comparison by value, comparand register, and collection voltages are more than or equal to ginseng It examines voltage value then DSP control unit output termination signal, closes main switch, otherwise treated that collection voltages are less than with reference to electricity Pressure value, D/A converting circuit carries out the digital signal result of digital-to-analogue conversion and logarithmic mode conversion to the signal of input and threshold value carries out Multilevel iudge adjusts the sampling rate of acquisition control system.For the digitlization PFC collection control method for realizing this DSP, use Green Hills Tools carries out programming.

A kind of digitlization PFC collection control method based on DSP, method and step include:

Step 1: signal acquisition unit acquires PFC output voltage U0Signal value, the voltage signal of acquisition puts by filtering Big processing, obtains output signal U m.The voltage value U of signal acquisition unit acquisition PFC output circuit0, it is input in amplifying unit It is filtered enhanced processing, filter out the clutter in signal and carries out signal amplification, obtains the output signal U m of amplifying unit.

Step 2: Um is input in corresponding DSP control unit comparand register, while being adopted according to Um size to signal The use rate of collection unit is controlled, and the reference voltage Ut of acquisition signal Um and DSP setting in comparand register are carried out Comparison, judges whether Um is more than or equal to Ut.

Step 3: DSP terminates output signal, and DSP, which is terminated, generates PWM wave, and pfc circuit stops if Um is more than or equal to Ut Only work.

Step 4: DSP control unit handles error information according to algorithm, is exported if Um is less than Ut Value signal Us, DSP control unit adjust sampling algorithm, change sampling interval and sampling rate.

Step 5: calculating the error signal St of signal value Um and reference voltage value Ut, whether error in judgement signal St is less than Threshold value δ;

Step 6: DSP control unit terminates output if error signal is less than or equal to threshold value δ, main switch is closed, If error signal is greater than threshold value δ, modified PI algorithm is adjusted, the output signal of DSP is changed, adjustment signal acquisition unit Sampling rate.The signal of DSP control unit is converted by D/A and driving unit, and being converted to is switched on or off main switch The output signal of signal, main switch passes through current rectifying and wave filtering circuit and relay conversion circuit, then passes to the secondary of pfc circuit Circuit.DSP control unit will convert digital signals into analog drive signal automatically, and the PWM for generating a controllable duty ratio drives Dynamic waveform, handles through driving unit, is converted to the signal for being switched on or off main switch, the running of main switch is driven to control Pfc circuit output processed.

Collection control method includes digital collection method and digitalization control method, as shown in Fig. 2, digital collection side Method specifically: signal acquisition is carried out to PFC output signal by signal acquisition unit, through wave filter filtering clutter, then to this Signal amplifies, and is input in DSP control unit, if Um is more than or equal to Ut, pfc circuit stops working;If conversely, DSP is controlled Unit processed carries out digital-to-analogue conversion to sampled signal according to sampled value, obtains accurate digital signal, and real-time according to sampling algorithm Control sampling rate and the sampled point interval of signal acquisition unit.

As shown in figure 3, digitalization control method specifically: reference voltage Ut and threshold value δ are preset according to actual needs, As DSP control unit acquisition sampled signal Um, if | Ut-Um |≤δ, DSP, which are terminated, generates driving signal, if | Ut-Um | > δ, by Um It is compared with the reference voltage Ut in comparand register, obtains error signal St, according to the size of St, modified in modified PI algorithm Transmission function, double regulation control can be carried out to the number of iterations and target final value simultaneously, further change accounting for for output drive signal Empty ratio achievees the purpose that stablize output.The formula of PI algorithm transmission function in method are as follows: K is proportionality coefficient, T in formulaiFor the time of integration.δ is the setting permissible value of system, and the size by the way that the threshold value is arranged is to determine The precision prescribed of system, k is proportionality coefficient, T in formulaiFor the time of integration.A/D, which is adopted, to be realized to output voltage by DSP control unit Sample and conversion, further realize full-digital control, D/A of the DSP control unit to driving signal to sampling interval and sampled point Conversion, generates the PWM square wave of adjustable duty cycle, the driving signal as PFC main switch.The present invention changes analog signal and adopts The shortcomings that circuit is cumbersome when collection, component aging, effectively raises sampling precision, improves sample rate.Follow-on PI is calculated Method acquires data by comparing, and the number of iterations and target final value of real-time control itself adjust the duty ratio of driving signal Section reduces energy loss, stablizes PFC output, increase power factor.

The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way Limitation, as long as the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out is used, or without changing It is within the scope of the present invention into the conception and technical scheme of the invention are directly applied to other occasions.This hair Bright protection scope should be determined by the scope of protection defined in the claims.

Claims (5)

1. a kind of digitlization PFC collection control method based on DSP, which is characterized in that adopted including the digitlization PFC based on DSP Collect control system, the digitlization PFC acquisition control system is connected to the rectification filter circuit output end and main switch of pfc circuit Between pipe, digitlization PFC acquisition control system includes that signal acquisition unit, filter and amplification unit, DSP control unit and driving are single Member, the output end that the input terminal of signal acquisition unit is connected to pfc circuit are used to acquire the output signal of pfc circuit, and signal is adopted The input terminal for collecting the output end connection filter and amplification unit of unit carries out signal filter by signal of the filter and amplification unit to acquisition Wave enhanced processing, the input terminal of the output end connection DSP control unit of filter and amplification unit and the signal after input processing are to DSP Control unit carries out signal judgement, the output end connection signal acquisition unit and driving unit of DSP control unit, DSP control list Member changes the sampling rate of signal acquisition unit according to input signal output order to signal acquisition unit and driving unit control, Driving unit connects the on-off of the main switch of pfc circuit and the instruction control main switch according to DSP control unit;The filter Filter and amplifying circuit are equipped in wave amplifying unit, the input terminal of the output interface connection signal acquisition unit of filter is used to The clutter in acquisition signal is filtered out, the output interface connection amplifying circuit and input signal of filter amplify letter into amplifying circuit Number;Comparand register and reference voltage value are equipped in the DSP control unit, comparand register is by reference voltage value and input The signal of DSP control unit carries out data comparison;Analog to digital conversion circuit and threshold value are equipped in the DSP control unit, modulus turns Circuit is changed to carry out analog-to-digital conversion to the signal of input and be compared judgement with threshold value to the digital signal result of analog-to-digital conversion;Institute Stating pfc circuit includes that rectifier bridge, filtering booster circuit, main switch, current rectifying and wave filtering circuit and relay conversion circuit, voltage are defeated Enter rectifier bridge, by filtering booster circuit, main switch, current rectifying and wave filtering circuit, relay conversion circuit, output to connection relay The secondary circuit of device conversion circuit;
The method step includes:
Step 1: acquiring the signal value of PFC output voltage U0 by signal acquisition unit, the voltage signal of acquisition is put by filtering Big processing, obtains output signal U m;
Step 2: Um is input in corresponding DSP control unit comparand register, by the acquisition signal Um in comparand register It is compared with the reference voltage Ut of DSP control unit setting, judges whether Um is more than or equal to Ut;
Step 3: DSP control unit terminates output signal, and DSP control unit, which terminates, generates PWM if Um is more than or equal to Ut Wave, pfc circuit stop working;
Step 4: DSP control unit is handled error information according to algorithm, DSP control unit tune if Um is less than Ut Sampling algorithm is saved, sampling interval and sampling rate are changed.
Step 5: calculating the error signal St of signal value Um and reference voltage value Ut, whether error in judgement signal St is less than threshold value δ;
Step 6: DSP control unit terminates output, if error signal is greater than if error signal St is less than or equal to threshold value δ Threshold value δ then adjusts modified PI algorithm, changes the output signal of DSP control unit, the sampling speed of adjustment signal acquisition unit Rate.
2. the digitlization PFC collection control method according to claim 1 based on DSP, which is characterized in that the method packet It includes digital collection method: signal acquisition being carried out to PFC output signal by signal acquisition unit, is filtered out through wave filter miscellaneous Wave, then the signal is amplified, it is input in DSP control unit, if Um is more than or equal to Ut, pfc circuit stops working;If anti- It, DSP control unit carries out analog-to-digital conversion to sampled signal according to sampled value, obtains accurate digital signal, and according to sampling The sampling rate of algorithm real-time control signal acquisition unit and sampled point interval.
3. the digitlization PFC collection control method according to claim 1 based on DSP, which is characterized in that the method packet It includes digitalization control method: presetting reference voltage Ut and threshold value δ according to actual needs, sampled when DSP control unit obtains Signal Um, if | Ut-Um |≤δ, DSP control unit, which terminates, generates driving signal, if | Ut-Um | > δ, by Um and comparand register In reference voltage Ut comparison, obtain error signal St, according to the size of St, modify the transmission function in modified PI algorithm, The number of iterations and target final value are regulated and controled, the drive signal duty cycle of output driving unit is changed.
4. the digitlization PFC collection control method according to claim 3 based on DSP, which is characterized in that in the method The formula of PI algorithm transmission function are as follows:
K is proportionality coefficient in formula, and Ti is the time of integration, and δ is the setting permissible value of system.
5. the digitlization PFC collection control method according to claim 1 based on DSP, which is characterized in that the method step DSP control unit converts digital signals into analog drive signal automatically in rapid, generates the PWM driving wave an of controllable duty ratio Shape is handled through driving unit, is converted to the signal for being switched on or off main switch, and the running of main switch is driven to control Pfc circuit output.
CN201510655694.7A 2015-10-09 2015-10-09 Digitlization PFC acquisition control system and method based on DSP CN105186854B (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546963A (en) * 2009-04-22 2009-09-30 南京航空航天大学 Digital monocyclic control method of PFC converter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101404446B (en) * 2008-11-11 2011-02-16 珠海格力电器股份有限公司 Monocycle power factor emendation method
CN102187559B (en) * 2008-11-25 2014-07-30 株式会社村田制作所 PFC converter
CN101552547B (en) * 2009-01-14 2011-07-20 西南交通大学 Pseudo-continuous work mode switch power supply power factor correcting method and device thereof
CN201438679U (en) * 2009-08-21 2010-04-14 朝阳无线电元件有限责任公司 Digital power circuit
CN102255490A (en) * 2011-04-29 2011-11-23 佛山市南海赛威科技技术有限公司 PFC (power factor correction) circuit based on delta-sigma modulation technique and duty ratio control method thereof
ITMO20130267A1 (en) * 2013-09-26 2015-03-27 Meta System Spa Charger for electric vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546963A (en) * 2009-04-22 2009-09-30 南京航空航天大学 Digital monocyclic control method of PFC converter

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