Momwe mungasankhire molondola zida zoyendetsedwa ndi silicon chowotcha kutentha

Kusankhidwa koyenera kwa zida zamagetsi zamagetsi monga thyristors ndi rectifiers ndizofunika kwambiri kuti zitsimikizire kudalirika kwa ng’anjo yosungunuka ndikuchepetsa mtengo wa ng’anjo yosungunuka. Kusankhidwa kwa zigawo kuyenera kuganizira mozama zinthu monga momwe amagwiritsira ntchito, njira yozizirira, mtundu wa dera, katundu wa katundu, ndi zina zotero, ndikuganizira zachuma pansi pa chikhalidwe chowonetsetsa kuti magawo a zigawo zosankhidwa ali ndi malire.

Popeza magawo ogwiritsira ntchito zida zamagetsi zamagetsi ndiakulu kwambiri, ndipo mafomu ogwiritsira ntchito ndi osiyanasiyana, zotsatirazi zimangofotokozera masankhidwe a magawo a thyristor m’mabwalo okonzanso komanso mabwalo apakati apakati apakati amtundu wa inverter.

1 Kusankha kwa chipangizo cha rectifier

Kuwongolera pafupipafupi mphamvu ndi imodzi mwamagawo omwe amagwiritsidwa ntchito kwambiri pazigawo za SCR. Kusankhidwa kwa chigawocho makamaka kumaganizira mphamvu zake zovotera komanso zomwe zidavotera pano.

(1) Ma voliyumu apamwamba kwambiri a VDRM ndi VRRM a chipangizo cha thyristor:

Iyenera kukhala nthawi 2-3 ya mphamvu yapamwamba kwambiri ya UM yomwe chigawocho chimanyamula, ndiko kuti, VDRM/RRM=(2-3)UM. Miyezo ya UM yogwirizana ndi maulendo osiyanasiyana okonzanso akuwonetsedwa mu Table 1.

(2) Yovoteledwa pa-state panopa IT (AV) ya chipangizo thyristor:

Mtengo wa IT (AV) wa thyristor umatanthawuza kuchuluka kwa mphamvu ya ma frequency sine theka-wave, ndi mphamvu yake yofananira ITRMS=1.57IT(AV) . Pofuna kuteteza chigawocho kuti chisawonongeke chifukwa cha kutentha kwambiri panthawi yogwira ntchito, phindu lenileni lomwe likuyenda mu gawoli liyenera kukhala lofanana ndi 1.57IT (AV) pambuyo pochulukitsa ndi chitetezo cha 1.5-2. Pongoganiza kuti kuchuluka kwazomwe zikuchitika pagawo lokonzanso ndi Id ndipo kufunikira kwaposachedwa pazida zilizonse ndi KId, zomwe zidavotera pa chipangizocho ziyenera kukhala:

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

Kfd ndiye chiŵerengero chowerengera. Pamakona owongolera α= 0O, ​​ma Kfd omwe ali pansi pa mabwalo osiyanasiyana owongolera akuwonetsedwa mu Gulu 1.

Table 1: Mphamvu yapamwamba kwambiri ya UM ya chipangizo chobwezeretsanso ndi mawerengero a Kfd pa avareji yapano

Zindikirani: U2 ndi mtengo wogwira ntchito wamagetsi achiwiri amtundu wa loop transformer; The single-wave inductive load circuit ili ndi freewheeling diode.

Posankha chigawo cha IT (AV) mtengo, njira yochepetsera kutentha ya chigawocho iyeneranso kuganiziridwa. Kawirikawiri, mtengo wamtengo wapatali wa gawo lomwelo la kuzizira kwa mpweya ndi wotsika kuposa madzi ozizira; pakakhala kuzizira kwachilengedwe, mphamvu yamagetsi yachigawo iyenera kuchepetsedwa kukhala gawo limodzi mwa magawo atatu a chikhalidwe chozizira chokhazikika.