Yini okufanele ngiyenze ngokuvikelwa kwe-overcurrent lapho ukuchithwa kwesithando somlilo inamandla aphelele?

1. Isenzakalo sokwehluleka

I-inverter iyehluleka uma amandla efrikhwensi amaphakathi ephuma ngamandla aphelele, futhi nokuvikela okudlulele kuyasebenza. Ekuphumeni kwamandla aphansi, imvamisa emaphakathi yehla ngokuzumayo, i-Ua iyehla futhi i-Id iyanda.

2. Ukuhlaziywa kokwehluleka kanye nokwelashwa

Ngokuvumelana nephutha elenzeka, kunqunywa ngaphambilini ukuthi ingalo eyodwa yebhuloho yebhuloho eliguquguqukayo ayiqhubeki. Uma ingalo yebhuloho engunombolo 3 ingasebenzi, ingalo yebhuloho engunombolo 4 ayikwazi ukuvalwa.

Ukubuka i-U4 nge-oscilloscope nakho kuwumugqa oqondile. I-voltage yengalo yebhuloho engu-No. 3 ilingana ne-voltage yomthwalo, ngakho i-waveform ye-U3 iyigagasi le-sine eliphelele. Uma iphutha elishiwo ngenhla lenzeka, qala unqume ukuthi i-thyristor ayiqhubi noma enye ingxenye yengalo yebhuloho ivuliwe.

Uma i-thyristor ingaqhubi, i-oscilloscope ingasetshenziswa ukuze kuthuthukiswe ukuthi isifunda se-trigger sinephutha, i-thyristor control pole inephutha, noma umugqa unephutha.

Okokuqala sebenzisa i-oscilloscope ukuze uhlole ukuthi ingabe ikhona yini i-trigger pulse engalweni yebhuloho nokuthi i-trigger pulse ijwayelekile yini. Uma i-trigger pulse ingejwayelekile, iphutha lisendaweni ye-trigger. Ukushintsha kufanele kusethelwe endaweni yokuhlola, futhi ama-waveforms engxenye ngayinye ye-trigger circuit kufanele ahlolwe isinyathelo ngesinyathelo ukuze kutholwe iphutha. iphuzu. Uma i-trigger pulse ijwayelekile, sebenzisa i-multimeter ukuze uhlole ukuthi isigxobo sokulawula se-thyristor sivulekile noma sifushane.

Uma kuvamile, hlola ukumelana phakathi kwe-electrode yokulawula kanye ne-cathode ye-thyristor. Uma ukumelana kwangaphakathi kwesigxobo sokulawula kukhulu kakhulu, buyisela i-thyristor.

Uma i-thyristor ivaliwe njalo, hlola ukuthi iqembu lama-thyristors avaliwe lifushane. Uma kuvamile, hlola ukuthi isikhathi sokuvala se-thyristor side kakhulu.