Dambudziko Ongororo yeThyristor Kuputsika muInduction Melting Furnace

Pane zvikonzero zvakawanda zvekuputsika kwe thyristor mu induction melting furnace, kusanganisira dunhu uye hutano hwe thyristor pachayo. Kukanganisa kukuru kwekuparara kwe thyristor kunoongororwa pasi apa.

(L) Kupokana kwemhepo yekupikisa-capacitance absorption circuit ye ​​thyristor ye induction melting furnace inoputika kana waya yakaputsika, izvo zvinoita kuti thyristor iparadze kana kukanganisa maitiro. Nekuda kwekuvapo kwemutsara inductance mudunhu (transformer leakage inductance LB, reactor), iyo thyristor inokonzera kudzima overvoltage panguva yekudzima muitiro, uye kukosha kwayo kunogona kusvika 5-6 nguva peak kushanda voltage, saka zviri nyore kuita kuti thyristor iparare Kana maitiro acho atonyanya kuipa.

(2) Induction inonyungudutsa furnace inverter bhiriji rekushandura contactor nekuda kwekubata sintering, kutadza kwemuchina, kana kukosha kwekugadzika kweiyo shanduko potentiometer yakakura kwazvo, mushure mekunge inverter yachinja, iyo contactor haigone kuvhurwa kana kuchinjika, zvichikonzera ikozvino-kumisa. magnetic mhete Haishande, zvichiita kuti thyristor iparare. Mukufamba kweiyo thyristor, nekuda kweiyo commutation ikozvino, capacitor discharge, zvichingodaro, zvinokonzeresa yakakura ikozvino kusimuka rate du/df, uye yakakura ikozvino kusimuka kuchaita kuti mukati meiyo thyristor inonoke kupararira. kune ese PN junctions. Somugumisiro, iyo PN junction pedyo negedhi re thyristor inopiswa nekuda kwehuwandu hwemazuva ano, zvichiita kuti thyristor iparadze. Iyo magineti mhete yakaiswa pane inverter bhiriji inogona kunyatso kudzika yazvino kusimuka mwero d//df uye kudzivirira thyristor.

(3) Mushure mekudzivirira kwekudzivirira kwechiito che induction melting furnace inoitika, rectification trigger pulse inonyangarika, zvichiita kuti rectifier thyristor ivhare, zvichiita kuti thyristor iparadze.

Isu tinoziva kuti kana chiitiko chekudzivirira-chazvino chikaitika, iyo rectifier trigger pulse inochinjirwa kune 150 madhigirii, kuitira kuti bhiriji rekugadziridza riri munzvimbo inoshanda inverter state, uye simba rakachengetwa musefa reactor rinodzoserwa kune grid kudzivirira. thyristor kubva pakupfuura-ikozvino. , The kukanganisa overpressure. Kana chiitiko chepamusoro-chazvino chikaitika, rectifier trigger pulse inonyangarika. Kana iyo rectifier thyristor ichidzimwa, kutendeuka kwakakwirira-kubvisa pamusoro-voltage kuchagadzirwa, kuitira kuti thyristor igadzirise kukanganisa kwe-over-current and over-voltage, iyo inogona kukonzera nyore kuparara kwe thyristor. Kutadza kwerudzi urwu kunowanzo kukonzereswa nekudzikira kwehunhu hweiyo yakaderera-simba thyristor pane inovharira kudzivirira bhodhi kana kuwedzera kwesimba rekupa. Inogona kugadziriswa nekubatanidza 4.7k potentiometer munhevedzano munharaunda, uye iyo chaiyo yekupikisa kukosha inotarirwa nekugadzirisa pakombiyuta.

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(5) Unhu hwe thyristor pachahwo hauna kunaka zvakakwana kana kuti hwakave huri pasi pekugadzirisa kwepamusoro uye kudarika kwepamusoro kakawanda, izvo zvinoita kuti maitiro e thyristor awedzere uye kuparara.