Ungakhetha kanjani kahle izingxenye ezilawulwa yi-silicon ukuchithwa kwesithando somlilo

Ukukhethwa okulungile kwemishini kagesi yamandla efana ne-thyristors kanye nezilungisi zokulungisa kubaluleke kakhulu ukuze kuqinisekiswe ukwethembeka kwesithando somlilo esincibilikisa induction nokunciphisa izindleko zesithando somlilo esincibilikayo. Ukukhethwa kwezingxenye kufanele kucabangele ngokuphelele izici ezifana nendawo esetshenziswa kuyo, indlela yokupholisa, uhlobo lwesekhethi, izakhiwo zokulayisha, njll., futhi kucabangele umnotho ngaphansi kombandela wokuqinisekisa ukuthi amapharamitha ezingxenye ezikhethiwe anamamajini.

Njengoba izinkundla zokufaka izicelo zemishini kagesi yamandla zibanzi kakhulu, futhi amafomu ezicelo athile ahlukene, okulandelayo kuchaza kuphela ukukhethwa kwezingxenye ze-thyristor kumasekhethi okulungisa kabusha kanye namasekhethi e-intermediate intermediate inverter yesigaba esisodwa.

1 Ukukhetha idivayisi yesekethe yesilungisi

Ukulungisa imvamisa yamandla kungenye yezinkambu ezisetshenziswa kakhulu zezingxenye ze-SCR. Ukukhethwa kwengxenye ikakhulukazi kubheka i-voltage yayo elinganiselwe kanye nesilinganiso samanje.

(1) Ama-voltage aphezulu aya phambili nangemuva i-VDRM ne-VRRM yedivayisi ye-thyristor:

Kufanele kube izikhathi ezingu-2-3 ze-voltage ephezulu ephezulu engu-UM ingxenye ethwalayo , okungukuthi, VDRM/RRM=(2-3)UM . Amanani e-UM ahambisana neziyingi ezihlukahlukene zokulungisa aboniswa kuThebula 1.

(2) Ilinganiselwe kusimo se-IT (AV) yamanje yedivayisi ye-thyristor :

Inani le-IT (AV) le-thyristor libhekisela enanini eliyisilinganiso se-sine half-wave yefrikhwensi yamandla, kanye nokusebenza okuhambisanayo kwayo ne-ITRMS=1.57IT(AV) . Ukuze uvimbele ingxenye ukuthi ingalinyazwa ukushisa ngokweqile ngesikhathi sokusebenza, inani langempela elisebenzayo eligeleza engxenyeni kufanele lilingane no-1.57IT(AV) ngemva kokuphindaphindwa isici sokuphepha esingu-1.5-2. Uma sicabanga ukuthi isilinganiso samanje somthwalo wesekethe yesilungisi siyi-Id futhi inani elisebenzayo lamanje eligeleza kudivayisi ngayinye lingu-KId, isilinganiso esikuso samanje sedivayisi ekhethiwe kufanele sibe :

IT(AV)=(1.5-2)KId/1.57=Kfd*Id

I-Kfd yi-coefficient yokubala. Nge-engeli yokulawula α= 0O , amanani e-Kfd ngaphansi kwamasekhethi ahlukahlukene aboniswa kuThebula 1.

Ithebula 1: I-voltage ephezulu ephezulu engu-UM yedivayisi yokulungisa kabusha kanye ne-coefficient yokubala i-Kfd yesilinganiso samanje sesimo

Qaphela : I-U2 inani elisebenzayo le-voltage yesigaba sesibili se-main loop transformer; isekethe eyodwa yomthwalo we-half-wave inductive ine-freewheeling diode.

Uma ukhetha inani le-IT (AV) yengxenye, imodi yokukhipha ukushisa yengxenye kufanele futhi icatshangelwe. Ngokuvamile, inani lamanje elilinganiselwe lengxenye efanayo yokupholisa umoya liphansi kunalelo lokupholisa amanzi; esimweni sokupholisa kwemvelo, umthamo olinganiselwe wengxenye kufanele uncishiswe ube ingxenye eyodwa kwezintathu yesimo sokupholisa esijwayelekile.