(A) Molao-motheo oa sebopeho sa phepelo ea motlakase e fetohang
1.1 Potoloho ea ho kenya
Potoloho ea li-linear filter, potoloho ea khatello ea hona joale, potoloho ea rectifier.
Mosebetsi: Fetolela marang-rang a kenyang motlakase oa AC hore e be phepelo ea motlakase ea DC ea phepelo ea motlakase e fihlelang litlhoko.
1.1.1 Linear filter circuit
Thibela li-harmonics le lerata
1.1.2 Potoloho ea filthara ea surge
Tobetsa ho phalla ha hona joale ho tsoa ho marang-rang
1.1.3 Potoloho ea ho lokisa
Fetolela AC ho DC
Ho na le mefuta e 'meli: mofuta oa ho kenya capacitor le mofuta oa ho kenya coil. Lisebelisoa tse ngata tsa ho fetola motlakase ke tsa pele
1.2 Phetoho ea potoloho
E na le switching circuit, output isolation (converter) circuit, joalo-joalo Ke mocha o ka sehloohong oaho fetola phepelo ea motlakasephetoho, 'me e phethela modulation ea chopping le tlhahiso ea waveform ea phepelo ea motlakase ka matla.
The switching power tube boemong bona ke sesebelisoa sa eona sa mantlha.
1.2.1 Ho fetola potoloho
Mokhoa oa ho khanna: ho ithabisa, ho thaba ka ntle
Phetoho ea potoloho: e ka thōko, e sa arohaneng, e resonant
Lisebelisoa tsa motlakase: Tse sebelisoang haholo ke GTR, MOSFET, IGBT
Mokhoa oa ho feto-fetoha: PWM, PFM, le lebasetere. PWM ke eona e sebelisoang hangata.
1.2.2 Sephetho sa converter
E arotsoe ka shaft-free le shaft-with. Ha ho na shaft e hlokahalang bakeng sa tokiso ea leqhubu le halofo le tokiso ea hajoale. Shaft ea hlokahala bakeng sa maqhubu a felletseng.
1.3 Ho laola potoloho
Fana ka li-pulses tsa khutlonnetsepa tse fetotsoeng ho potoloho ea koloi ho lokisa motlakase oa tlhahiso.
Reference circuit: Fana ka referense ea motlakase. Joalo ka litšupiso tse tšoanang LM358, AD589, letoto la litšupiso AD581, REF192, jj.
Sampling circuit: Nka kaofela kapa karolo ea motlakase o tsoang.
Amplification ea papiso: Bapisa lets'oao la sampole le lets'oao la litšupiso ho hlahisa lets'oao la phoso bakeng sa ho laola potoloho ea phepelo ea motlakase ea PM.
Phetoho ea V/F: Fetolela lets'oao la voltage ea phoso hore e be lets'oao la maqhubu.
Oscillator: Hlahisa maqhubu a phahameng a oscillation wave
Base drive circuit: Fetola lets'oao la oscillation le fetotsoeng hore e be lets'oao le loketseng la taolo ho khanna setsi sa switch tube.
1.4 Potoloho e hlahisoang
Ho lokisa le ho sefa
Lokisa motlakase oa motlakase ho pulsating DC ebe o o thethefatsa ho motlakase o tlase oa DC. Theknoloji ea ho lokisa sephetho hona joale e na le halofo ea leqhubu, leqhubu le felletseng, matla a sa feleng, ho habeli habeli, ho lumellana le mekhoa e meng ea tokiso.
(B) Tlhahlobo ea lisebelisoa tse fapaneng tsa matla a holimo
2.1 Buck converter
Buck circuit: Buck chopper, input le output polarity lia tšoana.
Kaha sehlahisoa sa volt-ea bobeli sa tefiso ea inductor le ho tsoa se lekana ka boemo bo tsitsitseng, motlakase oa ho kenya Ui, tlhahiso ea motlakase Uo; ka hona:
(Ui-Uo)ton=Uotoff
Uiton-Uoton=Uo*toff
Ui*ton=Uo(ton+toff)
Uo/Ui=ton/(ton+toff)=▲
Ke hore, kamano ea motlakase oa ho kenya le ho tsoa ke:
Uo/Ui=▲ (nako ea mosebetsi)
Buck potoloho topology
Ha sesebelisoa se buloa, matla a ho kenya a hloekisoa ke L inductor le C capacitor ho fana ka hona joale ho ea qetellong ea mojaro; ha sesebelisoa se tima, L inductor e tsoela pele ho phalla ka har'a diode ho boloka mojaro o ntse o tsoela pele. Phallo ea motlakase e ke ke ea feta matla a matla a ho kenya letsoho ka lebaka la potoloho ea mosebetsi.
2.2 Boost Converter
Boost circuit: chopper e matlafatsang, polarity ea ho kenya le ho tsoa e tšoana.
U sebelisa mokhoa o ts'oanang, ho ea ka molao-motheo oa hore ho tjhaja le ho ntša sehlahisoa sa bobeli sa volt ea inductor L se lekana le boemo bo tsitsitseng, kamano ea motlakase e ka fumanoa: Uo / Ui = 1 / (1-▲）
Matlafatsa topology ea potoloho
The switch tube Q1 le mojaro oa potoloho ena li hokahane ka tsela e tšoanang. Ha tube ea switjha e buletsoe, hona joale e feta ka har'a inductor L1 ho theola leqhubu, 'me motlakase o qosa inductor L1. Ha sesebelisoa sa switch se tingoa, inductor L e tsoa ho mojaro le phepelo ea motlakase, 'me motlakase o hlahisoang e tla ba motlakase oa Ui + UL, kahoo o na le phello e matlafatsang.
2.3 Flyback Converter
Potoloho ea Buck-Boost: Boost / Buck Chopper, polarity ea ho kenya le tlhahiso e fapane, 'me inductor e fetisoa.
Kamano ea motlakase: Uo/Ui=-▲/(1-▲）
Buck-Boost Potoloho ea Potoloho
Ha S e butsoe, phepelo ea matla a mojaro e qosa inductor feela. Ha S e tima, phepelo ea motlakase e ntšetsoa mojaro ka inductor ho fihlela phetisetso ea matla.
Ka hona, L inductor mona ke sesebelisoa sa ho fetisa matla.
(C) Libaka tsa kopo
Potoloho ea phepelo ea motlakase e na le melemo ea ts'ebetso e phahameng, boholo bo nyane, boima bo bobebe, le motlakase o tsitsitseng, ka hona e sebelisoa haholo mecheng ea likhokahano, likhomphutha, li-automation tsa indasteri, lisebelisoa tsa lapeng le likarolo tse ling. Ka mohlala, tšimong ea k'homphieutha, phepelo ea motlakase ea ho fetola e fetohile mokhoa o ka sehloohong oa phepelo ea matla a k'homphieutha, e ka netefatsang ts'ebetso e tsitsitseng ea lisebelisoa tsa k'homphieutha; lebaleng la matla a macha, phepelo ea matla a ho switjha e boetse e bapala karolo ea bohlokoa joalo ka sesebelisoa se ka fetolang matla ka botsitso.
Ka bokhutšoanyane, potoloho ea phepelo ea motlakase ke mokhoa o sebetsang hantle le o tšepahalang oa ho fetola matla. Molao-motheo oa eona oa ts'ebetso ke haholo-holo ho fetolela matla a motlakase a kentsoeng hore e be motlakase o tsitsitseng le o tšepahalang oa DC ka phetoho e phahameng ea maqhubu le ho sefa.
Nako ea poso: Oct-10-2024