Impamvu ebyiri nyamukuruof BYINSHI gutsindwa:
Kunanirwa kwamashanyarazi: ni ukuvuga, voltage ya BVdss hagati yumuyoboro nisoko irenze voltage yagenwe yaBYINSHI kandi bigera ubushobozi runaka, butera MOSFET kunanirwa.
Kunanirwa kw'umuvuduko w'irembo: Irembo rifite umuvuduko udasanzwe wa voltage, bigatuma irembo rya ogisijeni ryananirana.
Gusenyuka amakosa (gutsindwa na voltage)
Ni iki cyangiritse cyane? Muri make,MOSFET ni uburyo bwo kunanirwa bwakozwe na superposition hagati ya voltage ya bisi, transformateur yerekana voltage, voltage spike yamashanyarazi, nibindi na MOSFET. Muri make, ni kunanirwa bisanzwe bibaho mugihe voltage kumuyoboro wamazi-inkingi ya MOSFET irenze agaciro kayo kateganijwe kandi ikagera kumupaka runaka.
Ingamba zo gukumira ibyangiritse:
-Gabanya dosiye uko bikwiye. Muri uru ruganda, ubusanzwe rugabanukaho 80-95%. Hitamo ukurikije amasezerano ya garanti yisosiyete nibyihutirwa kumurongo.
-Ibikoresho byerekana imbaraga birumvikana.
-RCD, TVS yo kwinjiza ibizunguruka byumvikana.
-Icyuma kinini kigezweho kigomba kuba kinini gishoboka kugirango ugabanye inductance ya parasitike.
-Hitamo irwanya irembo Rg.
-Ongeraho RC damping cyangwa Zener diode iyinjizwa mumashanyarazi menshi nkuko bikenewe.
Kunanirwa kw'amashanyarazi
Hariho impamvu eshatu zingenzi zitera amashanyarazi adasanzwe adasanzwe: amashanyarazi ahamye mugihe cyo gukora, gutwara no guteranya; resonance yumuriro mwinshi itangwa nibintu bya parasitike yibikoresho nizunguruka mugihe cya sisitemu y'amashanyarazi; no guhererekanya ingufu nyinshi zinyuze muri Ggd kuri gride mugihe cya voltage nyinshi (ikosa rikunze kugaragara mugihe cyo kugerageza inkuba).
Ingamba zo gukumira amakosa ya voltage yumuryango:
Kurinda birenze urugero hagati y irembo ninkomoko: Iyo inzitizi iri hagati y irembo nisoko ari ndende cyane, ihinduka ritunguranye ryumubyigano hagati y irembo nisoko rihuzwa n irembo binyuze mubushobozi buri hagati ya electrode, bikavamo ingufu za UGS nyinshi cyane birenze urugero, biganisha ku kugenzura birenze irembo. Kwangiza burundu okiside. Niba UGS iri kuri voltage nziza yinzibacyuho, igikoresho nacyo gishobora gutera amakosa. Hashingiwe kuri ibyo, inzitizi z’umuzunguruko w’irembo zigomba kugabanywa mu buryo bukwiye kandi résistor de damping cyangwa 20V itunganya voltage igomba guhuzwa hagati y irembo nisoko. By'umwihariko hagomba kwitabwaho kugirango wirinde gukingura urugi.
Kurinda birenze urugero hagati yigituba gisohora: Niba hari inductor mumuzunguruko, impinduka zitunguranye mumashanyarazi (di / dt) mugihe igice kizimye bizavamo amashanyarazi ya voltage hejuru yumuriro utanga, bikangiza ibyangiritse. Kurinda bigomba gushiramo Zener clamp, RC clamp, cyangwa RC yo guhagarika.
Igihe cyoherejwe: Nyakanga-17-2024
