Maemo a conduction a Thyristor: Ntlha ea pele, motlakase o ka pele o tlameha ho sebelisoa pakeng tsa anode le cathode ea thyristor; ea bobeli, motlakase oa pele o boetse o tlameha ho sebelisoa hekeng. Maemo ana ka bobeli a tlameha ho finyelloa ka nako e le 'ngoe hore thyristor e kene sebakeng sa conduction.


Slkor BTB16-800B Unidirectional Silicon Control Rectifier SCR TO-263 

Ho e beha ka tsela e bonolo, hore thyristor e tsamaise:

(1) Letšoao le tlameha ho sebelisoa;

(2) Anode e tlameha ho ba boemong bo phahameng ho feta cathode (ke hore, motlakase oa pele o tlameha ho ba teng pakeng tsa bona).

Hang ha thyristor e ntse e khanna, e ntse e sebetsa le haeba motlakase oa heke o fokotsehile kapa o tlosoa. Ka mantsoe a bonolo, e lula e le teng le ha lets'oao le felile.

Maemo a ho tima a Thyristor: Fokotsa kapa u tlose motlakase o ka pele pakeng tsa anode le cathode, e le hore anode ea hona joale e theohe ka tlase ho bonyane ba ho tšoara hona joale.

Ho nolofatsa:

● E le hore thyristor e bule, e hloka pontšo le anode hore e be boemong bo phahameng ho feta cathode.

● Hang ha e buletsoe, e lula e le teng le haeba letšoao le tlosoa (letšoao le le leng le lekaneng ho le qala).

● Ho e tima, e ka khaola phepelo ea motlakase ho potoloho ea anode-cathode kapa etsa hore bokhoni ba anode bo be tlase ho feta bokhoni ba cathode.

● Thyristor ea unidirectional e tšoana le diode e laoloang, e nang le tsamaiso ea eona e laoloang ke pontšo. Ka hona, e lumella metsi a tobileng ho feta a sa sitisoe; bakeng sa ho fapanyetsana hona joale, e tsamaisa nakong ea halofo ea potoloho e ntle empa e se halofo ea potoloho e mpe (diode mona e sebetsa e le rectifier).

A bidirectional thyristor (triac) e ka tsamaisa alternating current.

Tlhahlobo ea Nyeoe ea Lipotoloho tsa Taolo ea Thyristor

Unidirectional Thyristors (Likarolo tse ka laolang diode)

Phetoho ea Elektronike e Laoloang ke Leseli

● Sesebelisoa sa elektronike se laoloang ke khanya se sebelisa ho tsamaisa le ho thibela thyristor ho "bulela" le "tima". Ho tsamaisa le ho thibela thyristor ho laoloa ke matla a leseli la tlhaho (kapa leseli la maiketsetso).

● Sesebelisoa sena se loketse mabone a literata, mabone a liphasejeng tsa dormitory, kapa mabone libakeng tse ling tsa sechaba, se itimang motšehare le bosiu ho boloka motlakase.

Molao-motheo:

Joalokaha ho bontšitsoe setšoantšong sa potoloho ka holimo:

1. 220V AC e fetoleloa ho pulsating DC voltage ka tleloubu H le tokiso ea borokho bo felletseng, e sebetsang e le leeme la pele (hoo e ka bang 300V pulsating DC). Ha hona joale sena se phalla ka diode ea VS unidirectional thyristor ho ea pheletsong e 'ngoe, tleloubu e khantša. E le hore sena se etsahale, heke ea thyristor e tlameha ho fumana motlakase oa pontšo, o hlokang hore transistor ea 9014 e tsamaee.

2. 9014 e sebetsa joang?

300V pulsating DC e arotsoe ka R1 (100kΩ), R2 (470kΩ), le D (photoresistor). Ho sa le joalo, R1 le DW (zener diode) li etsa sekhetho sa motlakase, 'me DW e tiisa motlakase ho pholletsa le R2 le photoresistor ho 6.8V, e lokisetsa hore transistor e tsamaee.

● Motšehare, ha khanya e feta tekanyo e itseng, photoresistor D e bontša khanyetso e tlaase (≤1kΩ). Motlakase oohle oa 6.8V o theoha ho theosa le setsi sa transistor, o etsa hore transistor V e khaole (li-NPN transistors li khaotsoe maemong a phahameng). Ha ho na hona joale ho phallang ho tloha ho emitter ea eona, kahoo thyristor VS e sa sebetseng e ntse e koetsoe ka lebaka la ho haella ha motlakase oa motlakase, 'me bulb H ha e khantše. Resistor R1 le zener diode DW li fokotsa mocheso oa transistor hore o se ke oa feta 6.8V, o sireletsa transistor.

● Bosiu, ha khanya e oela ka tlaase ho tekanyo e itseng, photoresistor D e bontša khanyetso e phahameng (≥100kΩ). Sena se etsa hore transistor V e tsamaee pele (NPN transistors e tsamaisa maemong a tlase), ka hoo e ka bang 0.8V ho emitter, e leng se etsang hore thyristor VS e tsamaise le ho bonesa tleloubu H.

● Ho kenya le ho lokisa liphoso: Nakong ea ho kenya, beha boto ea potoloho e hatisitsoeng ka har'a mokotla oa polasetiki o bonaletsang 'me ue sireletse. E kopanye ka lebone le laoloang H, 'me u e behe ho shebana le leholimo kapa sebaka se khanyang haufi le fensetere ea moaho e amohelang mabone, ho qoba ho pepesetsoa mabone a bosiu ka har'a 3 metres.

● Debugging e lokela ho etsoa ka shoalane. Fetola khanyetso ea RP e le hore lebone le laoloang H le bulehe ka boemo bo loketseng ba khanya.

Mabone a ho lieha ha bonolo

● Molao-motheo oa potoloho: Potoloho ea leseli lena la ho lieha ho bonts'itsoe setšoantšong se khomaretsoeng, ka potoloho ea ho lieha e kentsoeng ka lebokoseng le nang le dashed. Setšoantšong, K ke switch.

● Ha K e koetsoe, hona joale e phalla ka ho toba ka K ho khantša tleloubu, 'me lipotoloho tse ling li lula li sa sebetse.

● Ha K e tingoa, motlakase oa 220V o lokisoa ke diode. Ka lehlakoreng le leng, e lefisa capacitor C ho isa ho R1; nakong ea ts'ebetso ea ho tjhaja C, ha ho na hona joale e phallang ka R2, kahoo transistor V e sala e khaotsoe. Ka lehlakoreng le leng, motlakase ona o fana ka motlakase oa trigger ho thyristor SCR ka R3 le R4, ho boloka thyristor e tsamaisa. Kahoo, lebone le lula le khantšitsoe ka nako e itseng ka mor'a hore le tingoe.

● Hang ha capacitor C e tjhaja ka botlalo, hona joale e phalla ka R1 le R2 ho ea botlaaseng ba transistor V, e fetola transistor V ho tloha ho khaola ho ea ho conduction. Ha transistor e tsamaisa, hona joale e phalla ka tleloubu ho ea ho R3 ebe e feta ka transistor ho ea pole e mpe. Ka nako ena, hobane transistor e na le impedance e tlaase, ha ho na hona joale e phallang ka R4 ho ea hekeng ea thyristor, kahoo thyristor SCR e tima. Kaha hona joale ho phalla ka tleloubu 'me R3 (220kΩ) e na le khanyetso e phahameng, motlakase ho pholletsa le tleloubu e tlaase haholo, 'me leseli lea tima.

● Nakong ea tieho ka mor'a hore lebone le tingoe potolohong ena, nako ea ho lieha e khethoa ke boleng ba resistor R1 le capacitor C.

● Potoloho ena e sebelisa thyristor unidirectional. Nakong ea tieho ka mor'a hore lebone le tingoe, khanya ea lebone e batla e le halofo ea khanya ea lona ha e khantšitsoe ka ho feletseng, e finyellang litlhoko tsa pono tsa batho ha e ntse e boloka matla.

● Tlhahiso ea potoloho: Bakeng sa unidirectional thyristor SCR potolohong ena, sebelisa MCR100－8 ka tekanyo ea motlakase ea bonyane 600V. Matla a bulb ha aa lokela ho feta 100W. VD ea diode ke 1N4007, 'me transistor V ke C1815. Lihanyetsi tsohle ke 1/8W carbon film resistors.

2. Bidirectional Thyristors (Likarolo tse ka laolang AC)

Se latelang ke "bilirectional thyristor circuit", e sebelisang ho itšehla thajana ea optocoupler ho laola lipotoloho tse phahameng tsa motlakase tse nang le matšoao a tlaase, tse nolofalletsang ho fifala ho tsoelang pele ha mabone.