基于dsp的反激式數(shù)字開關(guān)電源設(shè)計(jì)

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1、皖西學(xué)院本科畢業(yè)論文（設(shè)計(jì)）基于DSP的反激式數(shù)字開關(guān)電源的設(shè)計(jì)摘要：開關(guān)電源具有體積小、效率高等非常多的優(yōu)越性，在微型計(jì)算機(jī)、通訊電源、家用電器等領(lǐng)域中得到了廣泛的應(yīng)用。采用模擬控制方式的開關(guān)電源存在參數(shù)溫度漂移、抗干擾能力差、可配置性不強(qiáng)等諸多缺點(diǎn)。隨著微電子技術(shù)的不斷發(fā)展，開關(guān)電源的數(shù)字化研究己成為開關(guān)電源的熱點(diǎn)。本文研究與開發(fā)了一種基于DSP的反激式數(shù)字開關(guān)電源，闡述了開關(guān)電源的基本原理，應(yīng)用狀態(tài)開關(guān)平均法建立其大信號(hào)模型。在此基礎(chǔ)上，結(jié)合設(shè)計(jì)指標(biāo)，詳細(xì)探討了基本參數(shù)的選取原則，如濾波電容、高頻變壓器、開關(guān)應(yīng)力、吸收電

2、路結(jié)構(gòu)和參數(shù)，這是開發(fā)出滿足用戶需求且具備較高性價(jià)比產(chǎn)品的重要環(huán)節(jié)。在硬件方面，為了保證輸出性能優(yōu)越和隔離要求，應(yīng)用高精度線性光禍設(shè)計(jì)了輸出電壓采樣電路;為了系統(tǒng)安全可靠的運(yùn)行，設(shè)計(jì)了度檢測(cè)環(huán)節(jié)，防止器件過(guò)溫失效;為了調(diào)試和應(yīng)用的方便，開發(fā)了基于LCD的友好人機(jī)接口。在控制策略方面，為了保證系統(tǒng)的動(dòng)態(tài)性能和魯棒性，本設(shè)計(jì)采用模糊PID控制算法，在系統(tǒng)小信號(hào)模型的基礎(chǔ)上，設(shè)計(jì)了模糊規(guī)則表，利用查表法選取參數(shù)，減小了算法的復(fù)雜度。為了克服開關(guān)干擾，設(shè)計(jì)了EMI濾波器，同時(shí)對(duì)系統(tǒng)抗干擾設(shè)計(jì)也進(jìn)行了詳細(xì)的闡述。關(guān)鍵詞：反激式開關(guān)電源D

3、SP模糊PID皖西學(xué)院本科畢業(yè)論文（設(shè)計(jì)）BasedOntheDSPFlybackDigitalSwitchingPowerSupplyDesignAbstract:Switchingpowersupplyhastheadvantagesofsmallvolume,highefficiencyadvantages,inthemicrocomputer,householdappliances,communicationpowersupplyandotherfieldshavebeenwidelyappliedin.Analogc

4、ontrolmodeswitchingpowersupplytemperaturedrift,pooranti-interferenceabilityisnotstrong,canbeconfigured.Withthedevelopmentofmicroelectronicstechnology,switchingpowersupplyswitchingpowersupplydigitaldesignhasbecomearesearchhotspot.Inthispaper,theresearchanddevelopment

5、ofaDSPbasedflybackdigitalswitchingpowersupply,switchingpowersupplyisintroduced.Thebasicprinciple,applicationstatusswitchaveragemethodtobuildthelargesignalmodel.Onthisbasis,combinedwiththedesigntarget,discussedthebasicprincipleofselectingtheparameters,suchasthefilter

6、capacitor,switchstress,highfrequencytransformer,absorbingcircuitstructureandparameter,whichisdevelopedtomeetuserneedsandhaveahighcost-effectiveproductsanimportantpart.Inthehardwareaspect,inordertoensuresuperioroutputperformanceandisolationrequirements,applicationofh

7、ighprecisionlinearopticalwoedesignedoutputvoltagesamplingcircuit;inordertosafeandreliableoperationofsystem,designofdetecting,preventingdeviceover-temperaturefailure;fortheconvenienceofdebuggingandapplication,developmentofthefriendlyman-machineinterfacebasedontheLCD.

8、Inthecontrolstrategy,inordertoensurethesystemdynamicperformanceandrobustness,thedesignofthefuzzyPIDcontrolalgorithm,thesystemsmallsignalmo