Ndimele ndenze ntoni ngokhuseleko lwe-overcurrent xa ukuchithwa kwesithando somlilo ikwimveliso yamandla apheleleyo?

1. Isiganeko sokungaphumeleli

I-inverter iyasilela xa amandla ombane aphakathi akhutshwa ngamandla apheleleyo, kwaye ukhuseleko olugqithisiweyo luyasebenza. Kwimveliso yamandla aphantsi, i-frequency ephakathi iyancipha ngokukhawuleza, i-Ua iyancipha kwaye i-Id iyanda.

2. Uhlalutyo lokungaphumeleli kunye nonyango

Ngokwe-fault phenomenon, kugwetywa kwangaphambili ukuba ingalo enye yebhulorho yebhuloho ye-inverter ayiqhubeki. Ukuba ingalo yebhuloho yeNombolo ye-3 ayiqhubeki, ingalo yebhuloho yeNombolo ye-4 ayikwazi ukucima.

Ukujonga i-U4 nge-oscilloscope ikwangumgca othe ngqo. I-voltage ye-No. 3 ingalo yebhulorho ilingana nombane womthwalo, ngoko i-U3 waveform yi-sine wave epheleleyo. Xa iphutha elikhankanywe ngasentla lenzeka, okokuqala qaphela ukuba i-thyristor ayiqhubeki okanye enye inxalenye yengalo yebhuloho ivuliwe.

Ukuba i-thyristor ayiqhubeki, i-oscilloscope ingasetyenziselwa ukuqhubela phambili ukugqiba ukuba i-trigger circuit iphosakele, i-pale yokulawula i-thyristor iphosakele, okanye umgca uphosakeleyo.

Okokuqala sebenzisa i-oscilloscope ukujonga ukuba ngaba kukho i-trigger pulse kwingalo yebhulorho kunye nokuba i-trigger pulse iqhelekile. Ukuba i-trigger pulse ayiqhelekanga, impazamo ilele kwisiphaluka. Ukutshintsha kufuneka kumiselwe kwindawo yokuhlola, kwaye iifom ze-wave zecandelo ngalinye le-trigger yesiphaluka kufuneka zihlolwe inyathelo ngesinyathelo ukufumana iphoso. inqaku. Ukuba i-trigger pulse iyinto eqhelekileyo, sebenzisa i-multimeter ukujonga ukuba isibonda solawulo se-thyristor sivulekile okanye sifutshane.

Ukuba yinto eqhelekileyo, khangela ukuchasana phakathi kwe-electrode yokulawula kunye ne-cathode ye-thyristor. Ukuba ukuchasana kwangaphakathi kwepali yokulawula kukhulu kakhulu, buyisela i-thyristor.

Ukuba i-thyristor ihlala ivaliwe, khangela ukuba iqela le-thyristors elicinyiweyo lifutshane. Ukuba yinto eqhelekileyo, khangela ukuba ixesha lokucima i-thyristor lide kakhulu.