Teeb meem kev soj ntsuam ntawm Thyristor Breakdown nyob rau hauv Induction Melting Rauv

Muaj ntau qhov laj thawj rau kev tawg ntawm thyristor nyob rau hauv induction melting rauv, nrog rau cov Circuit Court thiab qhov zoo ntawm thyristor nws tus kheej. Cov teeb meem tseem ceeb ntawm thyristor tawg tau txheeb xyuas hauv qab no.

(L) Lub winding tsis kam ntawm qhov tsis kam-capacitance absorption Circuit Court ntawm thyristor ntawm induction melting rauv yog tshuab los yog cov hlau tawg, uas ua rau lub thyristor tawg lossis deteriorate cov yam ntxwv. Vim tias muaj cov kab inductance nyob rau hauv Circuit Court (transformer to inductance LB, reactor), thyristor ua rau lub sij hawm tig-off overvoltage, thiab nws cov nqi tuaj yeem ncav cuag 5-6 npaug ntawm qhov ua haujlwm siab tshaj, yog li nws yog ib qho yooj yim ua rau lub thyristor tawg Los yog cov yam ntxwv ua phem.

(2) Induction melting rauv inverter choj hloov dua siab tshiab contactor vim kev sib cuag sintering, mechanical tsis ua hauj lwm, los yog qhov teeb tsa tus nqi ntawm lub converter potentiometer loj heev, tom qab lub inverter hloov, tus contactor tsis tuaj yeem qhib lossis hloov, ua rau muaj kev txwv tam sim no. Lub nplhaib sib nqus tsis ua haujlwm, ua rau thyristor tawg. Nyob rau hauv cov txheej txheem commutation ntawm thyristor, vim yog lub commutation tam sim no, lub capacitor paug, thiab lwm yam, nws yuav ua rau ib tug loj tam sim no nce tus nqi du / df, thiab ib tug loj tam sim no nce tus nqi yuav ua rau lub internal tam sim no ntawm lub thyristor lig dhau mus kis. rau tag nrho PN junctions. Yog li ntawd, PN hlws ris nyob ze ntawm lub rooj vag ntawm thyristor yog kub hnyiab vim yog tam sim no ntau ntom ntom, ua rau lub thyristor tawg. Lub nplhaib sib nqus teeb tsa ntawm tus choj inverter tuaj yeem txo qhov nce tam sim no d / / df thiab tiv thaiv thyristor.

(3) Tom qab qhov kev tiv thaiv overcurrent ntawm lub qhov cub induction melting tshwm sim, lub rectification trigger mem tes ploj, ua rau lub rectifier thyristor tua, ua rau lub thyristor tawg.

Peb paub tias thaum muaj kev tiv thaiv dhau tam sim no tshwm sim, lub rectifier trigger mem tes hloov mus rau 150 degrees, yog li ntawd tus choj rectifier nyob rau hauv lub cev muaj zog inverter, thiab lub zog khaws cia hauv lub lim reactor raug xa rov qab mus rau daim phiaj tiv thaiv. lub thyristor los ntawm over-tam sim no. , Qhov cuam tshuam ntawm overpressure. Thaum ib qho kev ua dhau los tam sim no tshwm sim, lub rectifier trigger mem tes ploj. Thaum lub rectifier thyristor raug muab tua, lub siab tig-tawm tshaj-voltage yuav raug tsim, kom lub thyristor yuav tiv taus qhov cuam tshuam ntawm over-tam sim no thiab dhau-voltage, uas tuaj yeem yooj yim ua rau tawg ntawm thyristor. Qhov kev ua tsis tiav no feem ntau yog tshwm sim los ntawm kev tsis zoo ntawm cov yam ntxwv ntawm cov zis qis-power thyristor ntawm lub thaiv thaiv kev tiv thaiv los yog qhov nce ntawm cov khoom siv hluav taws xob. Nws tuaj yeem daws tau los ntawm kev sib txuas 4.7k potentiometer hauv series hauv Circuit Court, thiab qhov tseeb tus nqi tiv thaiv yog txiav txim siab los ntawm kev debugging ntawm lub computer.

(4) Cov yeeb nkab dej txias ntawm thyristor ntawm lub qhov cub induction melting yog thaiv, ua rau lub thyristor tawg vim cov av noo ntau dhau.

(5) Qhov zoo ntawm thyristor nws tus kheej tsis zoo txaus lossis nws tau raug cuam tshuam los ntawm overcurrent thiab overvoltage rau ntau zaus, uas ua rau cov yam ntxwv ntawm thyristor deteriorate thiab tawg.