Binciken Matsala na Rushewar Thyristor a cikin Furnace Narkewar Induction

Akwai dalilai da yawa na rushewar thyristor a cikin tanderun narkewa, gami da kewayawa da ingancin thyristor kanta. Babban laifuffuka na rushewar thyristor an yi nazari a ƙasa.

(L) Juriya na juriya na juriya-ƙarar da’ira na thyristor na murhun narkewar induction yana busa ko kuma wayar ta karye, wanda ke sa thyristor ya lalace ko ya lalata halayen. Saboda kasancewar inductance na layi a cikin kewayawa (mai canzawa leakage inductance LB, reactor), thyristor yana haifar da jujjuyawar kashewa yayin aiwatar da kashewa, kuma ƙimarsa na iya kaiwa sau 5-6 mafi girman ƙarfin aiki, don haka yana da sauƙi don haifar da rushewar thyristor Ko halayen sun zama mafi muni.

(2) Induction narkewa tanderu inverter gada hira contactor saboda lamba sintering, inji gazawar, ko saitin darajar da tuba potentiometer ne da girma, bayan da inverter da aka kunna, da contactor ba za a iya bude ko canza, da contactor ba za a iya bude ko kunna, sakamakon a halin yanzu-iyakance. zoben maganadisu baya aiki, yana haifar da rushewar thyristor. A cikin commutation na thyristor, saboda commutation halin yanzu, capacitor fitarwa, da dai sauransu, zai haifar da mafi girma a halin yanzu tashin kudi du/df, kuma mafi girma a halin yanzu tashin kudi zai sa na ciki halin yanzu na thyristor yayi latti don yadawa. zuwa duk mahadar PN. Sakamakon haka, mahadar PN da ke kusa da ƙofar thyristor ta kone saboda yawan yawa na yanzu, wanda hakan ya sa thyristor ya rushe. Zoben maganadisu da aka saita akan gadar inverter na iya ƙayyadadden ƙimar tashin d//df na yanzu da kuma kare thyristor.

(3) Bayan aikin kariyar wuce gona da iri na induction narkewar tanderu ya auku, gyaran bugun bugun jini ya ɓace, yana sa mai gyara thyristor ya kashe, yana haifar da rushewar thyristor.

Mun san cewa lokacin da aikin kariya na yau da kullun ya faru, ana jujjuya bugun bugun bugun jini zuwa digiri 150, ta yadda gadar gyara ta kasance a cikin yanayin inverter mai aiki, kuma makamashin da aka adana a cikin injin tacewa ana aika shi zuwa grid don hanawa. thyristor daga kasancewa a kan halin yanzu. , Tasirin wuce gona da iri. Lokacin da abin da ya wuce-nauyi ya faru, bugun bugun jini mai gyara ya ɓace. Lokacin da aka kashe thyristor mai gyarawa, za a haifar da babban jujjuyawar wutar lantarki, ta yadda thyristor zai jure tasirin wuce gona da iri da ƙarfin ƙarfin lantarki, wanda zai iya haifar da rushewar thyristor cikin sauƙi. Irin wannan gazawar gabaɗaya yana faruwa ne sakamakon lalacewar halayen ƙaramar ƙaramar ƙarfi ta thyristor akan allon kariya ko haɓakar wutar lantarki. Ana iya warware shi ta hanyar haɗa nau’in potentiometer na 4.7k a cikin jerin a cikin da’irar, kuma ana ƙayyade ƙimar juriya ta ainihi ta hanyar lalatawa akan kwamfutar.

(4) An toshe bututun ruwan sanyi na thyristor na murhun narkewar induction, yana haifar da rushewar thyristor saboda tsananin zafi.

(5) Ingancin thyristor da kansa ba shi da kyau ko kuma an yi shi ne da tasirin wuce gona da iri da yawa da yawa, wanda ke sa halayen thyristor su lalace da rushewa.