Imibono yokuxazulula ukushisa okukhulu kwama-MOSFET

Angazi uma uthole inkinga, i-MOSFET yenza njengemishini yokunikeza amandla ngesikhathi sokusebenza kwesinye isikhathi ukushisa okukhulu, ifuna ukuxazulula inkinga yokushisisaI-MOSFET, okokuqala kudingeka sithole ukuthi yiziphi izimbangela, ngakho-ke kudingeka sihlole, ukuze sithole ukuthi inkinga ikuphi. Ngokutholakala kwe-Ukushisa kwe-MOS inkinga, hamba ukhethe okulungile ukuhlolwa kwephuzu elingukhiye, akuhambelani nokuhlaziya, okuyisihluthulelo sokuxazulula inkinga.

Ekuhlolweni kokunikezwa kwamandla, ngaphezu kokulinganisa umjikelezo wokulawula wezinye izisetshenziswa ze-pin voltage njengezisindayo, kulandele i-oscilloscope ukuze kukale i-voltage waveform efanele. Uma siya ukuze sinqume ukuthi ugesi oshintshwayo awusebenzi kahle yini, lapho ukulinganisa ukunikezwa kwamandla kungabonisa isimo sokusebenza asivamile, ukuphuma kwesilawuli se-PWM akuyona into evamile, umjikelezo we-pulse duty kanye ne-amplitude akuyona into evamile, ukushintsha i-MOSFET ukungasebenzi kahle, kufaka phakathi i-transformer yesibili kanye nohlangothi oluyinhloko futhi ukukhishwa kwempendulo akufanelekile.

Ukuthi iphoyinti lokuhlola liwukukhetha okunengqondo kubaluleke kakhulu, ukukhetha okulungile kungaba izilinganiso eziphephile nezithembekile, kodwa futhi kusivumela ukuthi sixazulule inkinga ngokushesha ukuze sithole imbangela.

Ngokuvamile imbangela yokushisisa kwe-MOSFET yilokhu:

1: I-G-pole drive voltage ayanele.

2: I-Id current emseleni kanye nomthombo iphezulu kakhulu.

3: Imvamisa yokushayela iphezulu kakhulu.

Ngakho-ke ukugxila kokuhlolwa ku-MOSFET, ukuhlola okunembile umsebenzi wayo, okuwumsuka wenkinga.

Kumele kuqashelwe ukuthi lapho sidinga ukusebenzisa ukuhlolwa kwe-oscilloscope, kufanele sinake ngokukhethekile ukwanda kancane kancane kwe-voltage yokufaka, uma sithola ukuthi i-voltage ephakeme noma yamanje ngaphezu kobubanzi bethu bokuklama, kulokhu kufanele sinake. ukushisisa kwe-MOSFET, uma kukhona okungahambi kahle, kufanele uvale ngokushesha ukunikezwa kwamandla, uxazulule inkinga lapho inkinga ilele, ukuvimbela i-MOSFET ukuthi yonakale.