4. Umncedi unikezelo lwamandla {4905107} {490910}
Ibonelela ngamandla kwiimfuno ezahlukeneyo zazo zonke iisekethe enye.
Icandelo lesibini lomgaqo wolawulo lombane wolawulo lombane
iswitshi K ivulwa ngokuphindaphindiweyo kwaye icinywe ngamaxesha athile, kwaye xa iswitshi K ivuliwe, igalelo lamandla E linikezelwa kumthwalo RL ngokusebenzisa iswitshi K kunye nesekethe yokucoca.Ngexesha lokutshintsha lonke ixesha, i- unikezelo lwamandla E ibonelela ngamandla kumthwalo.Xa iswitshi K icinyiwe, igalelo unikezelo lwamandla E luphazamisa unikezelo lwamandla.Ingabonwa ukuba igalelo unikezelo lwamandla lubonelela ngamandla kumthwalo ngokunqamkileyo.Ukwenzela ukuba umthwalo ufumane unikezelo lwamandla oluqhubekayo, ukutshintshwa kulawulwa unikezelo lwamandla kufuneka lube neseti yezixhobo zokugcina amandla.Inxalenye yamandla igcinwa xa umtshini uvuliwe kwaye ukhululwe kumthwalo xa utshintsho lucinyiwe.
Umndilili wombane we-EAB phakathi kwe-AB unokubonakaliswa ngolu hlobo:
EAB=TON/T*E
Kwifomula, i-TON lixesha apho utshintsho luvuliwe ngexesha ngalinye, kwaye i-T ngumjikelezo womsebenzi wokutshintsha kunye nokucima (oko kukuthi, isixa sokutshintsha ngexesha le-TON kunye nexesha lokucimaTOFF).
Inokubonwa kwifomula ukuba ixabiso eliphakathi kombane phakathi kwe-AB litshintsha kwakhona ngokuguqula umlinganiselo wokutshintsha ngexesha kunye nomjikelo womsebenzi.Ke ngoko, ngotshintsho lomthwalo kunye negalelo unikezelo lwamandla i-voltage, umlinganiselo we-TON kunye ne-T unokuhlengahlengiswa ngokuzenzekelayo ukwenza i-voltage ye-V0 yokuphuma ihlale ifana.Ukutshintsha i-TON yexesha kunye nomlinganiselo womjikelezo womsebenzi kukutshintsha umjikelezo womsebenzi we-pulse.Le ndlela ibizwa ngokuba "yi-time ratio control" (TimeRatioControl, efinyeziweyo njenge-TRC).
Ngokomgaqo wolawulo we-TRC, kukho iindlela ezintathu:
1).UkuModareyitha koBububanzi bePulse (Uhlengahlengiso loBububanzi bePulse, lushunqulelwe njenge-PWM)
Ixesha lokutshintsha lihlala lihlala, kwaye umjikelo womsebenzi utshintshwa ngokutshintsha ububanzi be-pulse.
2).UkuModareyitha okuQhagamshelana ngokuQhutywayo (uKumodareyitha okuQhagamshelwayo, kufinyezwa njenge-PFM)
Ububanzi be-pulse yokuvula buhlala buhlala, kwaye umjikelo womsebenzi utshintshwa ngokutshintsha i-frequency switching.Ulwazi oluvela: UThutho kunye neNethiwekhi yeZixhobo zoSasazo
3).Ukumodareyitha kweHybrid
Ububanzi be-pulse kunye ne-frequency switching ayilungiswanga kwaye inokutshintshwa omnye nomnye.Ngumxube wezi ndlela zimbini zingasentla.
Ngo-1955, i-self-excillating oscillating push-pull transistor single-transformer DC converter eyaqanjwa ngu-American Roger (GH. Roger) yaba sisiqalo sofezekiso lweesekethe zolawulo loguqulo oluphezulu.I-Transformer, ngo-1964, izazinzulu zaseMelika zacebisa umbono wokurhoxisa uthotho lokutshintsha unikezelo lwamandla yoguqulo lwamandla ombane, olufumene indlela esisiseko yokunciphisa ubungakanani kunye nobunzima be-p.3948737} unikezelo lwabaxhasi. Ngo-1969, ngenxa yophuculo lokumelana nombane we-silicon transistors ephezulu yamandla kunye nokuncipha kwexesha lokubuyisela umva i-diode, ekugqibeleni unikezelo lwamandla okutshintsha lwe-25 kHz lwenziwa.
Okwangoku, izixhobo zombane zokutshintsha zisetyenziswa kakhulu phantse kuzo zonke izixhobo zombane ezifana nezixhobo ezahlukeneyo zetheminali kunye nezixhobo zonxibelelwano ezilawulwa ziikhompyuter zombane ngenxa yobungakanani bazo obuncinci, ubunzima bokukhanya kunye nokusebenza kakuhle.imo yamandla.Phakathi kombane otshintshayo ngoku kwimarike, i-100kHz unikezelo lwamandla eyenziwe ngee-bipolar transistors kunye ne-500kHz unikezelo lwamandla lwe-8 {5} 824 MOS 5 {82}-I-FET isetyenziswe ngendlela ebonakalayo, kodwa amaxesha azo kufuneka aphuculwe ngakumbi.Ukwandisa i-frequency yokutshintsha, kuyimfuneko ukunciphisa ilahleko zokutshintsha, kunye nokunciphisa ilahleko zokutshintsha, iinqununu zokutshintsha ngokukhawuleza zifunekayo.Nangona kunjalo, njengoko isantya sokutshintsha sikhula, ukunyuka okanye ingxolo inokuveliswa ngenxa ye-inductance esasazwayo kunye ne-capacitors kwisiphaluka okanye intlawulo egcinwe kwiidiode.Ngale ndlela, ayiyi kuchaphazela kuphela izixhobo zombane ezijikelezileyo, kodwa iya kunciphisa kakhulu ukuthembeka kwe- unikezelo lwamandla ngokwayo.Phakathi kwazo, ukuze kuthintelwe ukunyuka kwamandla ombane okwenzeka ngokuvulwa kunye nokuvalwa kokutshintsha, i-RC okanye i-LC buffers ingasetyenziswa, kunye nokunyuka kwangoku okubangelwa yintlawulo egciniweyo ye-diode, i-buffer magnetic eyenziwe nge-amorphous.undoqo wemagnethi unokusetyenziswa.Nangona kunjalo, kwii-frequencies eziphezulu ngaphezu kwe-1MHz, i-resonant circuit ifanele isetyenziswe, ukwenzela ukuba i-voltage kwi-switch okanye i-current ngokusebenzisa i-switch ibe yi-sine wave, engakwazi ukunciphisa ilahleko yokutshintsha kuphela, kodwa iphinde ilawule ukwenzeka kokunyuka.Le ndlela yokutshintsha ibizwa ngokuba yi-resonant switching.Okwangoku, uphando ngolu hlobo lokutshintsha unikezelo lwamandla lusebenza kakhulu, kuba le ndlela inokunciphisa ilahleko yokutshintshela kwi-zero ngaphandle kokunyusa kakhulu isantya sokutshintsha, kwaye ingxolonayo incinci, ekulindeleke ukuba ibe yenye yee-frequencies eziphezulu zokutshintsha unikezelo lwamandla .indlela ephambili.Okwangoku, amazwe amaninzi ehlabathini asebenza kuphando olusebenzayo lwabaguquli be-multi-terahertz.
