litaba

Har'aPhetoho ea motlakase ea PFC, phepelo ea motlakase e laolang phepelo ea motlakase ke karolo ea bohlokoa haholo.Ts'ebetso ea phepelo ea motlakase ho PFC ha e fapane haholo le phepelo ea motlakase e tloaelehileng, empa ho na le phapang ea phepelo ea motlakase.Phepelo e tloaelehileng ea phepelo ea motlakase e hloka phepelo ea motlakase ea 220V, ha phepelo ea motlakase ea PFC e tsamaisoa ke B+PFC.

Ka mor'a ho lokisoa, ha ho na capacitor ea filthara e eketsoang, 'me motlakase o sa hloekisoang o motle oa halofo ea potoloho o sebelisoa e le phepelo ea matla ea chopper.Kaha "voltage e ntle ea chopper" e "khetsoe" ho sebopeho sa maqhubu a hajoale, litšoaneleho tsa sebopeho sa wave ke:
1. Mokhoa oa hona joale oa maqhubu o khaotsa, 'me enfelopo ea eona e tšoana le maqhubu a motlakase,' me mohato oa enfelopo le wave wave wave o tšoana.
2. Ka lebaka la phello ea ho khaola, matla a DC a nang le halofo ea pulsating a fetoha maqhubu a phahameng (a khethiloeng ke maqhubu a ho khaola, hoo e ka bang 100khz) "AC" matla.Matla ana a maqhubu a phahameng a "AC" a tlameha ho lokisoa hape pele a ka laoloa ke tšebeliso e latelang ea PWM ea Power.
3. Ho latela pono e akaretsang ea phepelo ea matla a kantle, sistimi ea matla e fihlela hore motlakase oa AC le AC hona joale o maemong 'me maqhubu a motlakase le a hona joale a tsamaisana le sinusoidal waveform, e sa rarolleng feela bothata ba matšeliso a matla a matla, empa hape e rarolla mathata a ho lumellana ha motlakase le tšitiso ea motlakase.

Matla a "alternating current" a phahameng-frequency a lokisoa ke diode ea rectifier ebe e sefshoa ka har'a motlakase o tobileng oa hona joale ebe o fuoa phepelo ea motlakase ea phetoho ea PWM e latelang.Matla ana a DC a boetse a bitsoa B+PFC.Motlakase oa B+PFC o hlahisoang ke chopper hangata o phahame ho feta +300V ka mor'a tokiso ea pele ea 220 AC le ho sefa.Lebaka ke hore mohala o phahameng oa motlakase o khethiloe, bophara ba mohala oa inductor e nyenyane, 'me mohala oa motlakase o theoha o monyenyane.Bokhoni ba filthara capacitor bo nyane, mme phello ea ho sefa e ntle, 'me ho na le melemo e mengata joalo ka litlhoko tse tlase bakeng sa tube e tlase ea PWM.

Hajoale, karolong ea phepelo ea motlakase ea PFC, tube ea chopper e sebetsang e le switch e na le mekhoa e 'meli ea ho sebetsa:
1. Mokhoa o tsoelang pele oa ho khanna (CCM): Nako ea ts'ebetso ea tube e fetohang e lula e le teng, 'me potoloho ea mosebetsi oa ho khanna e fetoha ka amplitude ea motlakase oa ho khaola.
2. Discontinuous conduction mode (DCM): Maqhubu a ts'ebetso ea "chopper switch tube" a fetoha ka boholo ba motlakase oa ho khaola.

ThePhepelo ea motlakase ea PFCkarolo le karolo e tsosang takatso ea karolo ea phepelo ea matla ea PWM ea phepelo ea matla a matla a ho lokisa phepelo ea motlakase kaofela li phetheloa ke potoloho e kopaneng, 'me IC e le' ngoe e ka phethela moralo.