Indlela yokukhetha ngokuchanekileyo amacandelo alawulwa yi-silicon ukuchithwa kwesithando somlilo

Ukukhethwa okuchanekileyo kwezixhobo zombane zamandla ezifana ne-thyristors kunye ne-rectifiers kubaluleke kakhulu ukuqinisekisa ukuthembeka kwesithando sokunyibilikisa i-induction kunye nokunciphisa iindleko zesithando sokunyibilikisa induction. Ukukhethwa kwamacandelo kufuneka kuthathelwe ingqalelo ngokubanzi imiba efana nemekobume yokusetyenziswa kwayo, indlela yokupholisa, uhlobo lwesekethe, iimpawu zomthwalo, njl. njl., kwaye ithathele ingqalelo uqoqosho phantsi komqathango wokuqinisekisa ukuba iiparamitha zamacandelo akhethiweyo anemida.

Ekubeni imimandla yesicelo sezixhobo zombane zamandla zibanzi kakhulu, kwaye iifom zesicelo ezithile zahlukene, oku kulandelayo kuchaza kuphela ukukhethwa kwamacandelo e-thyristor kwiisekethe zokulungisa kunye neesekethe ze-intermediate inverter zesigaba esisodwa.

1 Ukukhetha isixhobo sesekethe yesilungisi

Ukulungiswa kwamaza ombane yenye yezona ndawo ziqhelekileyo zisetyenziswa kumacandelo e-SCR. Ukhetho lwecandelo luqwalasela ubukhulu becala i-voltage yayo elinganisiweyo kunye nomlinganiselo wangoku.

(1) Incopho yombane yangaphambili kunye neyincopho yeVDRM kunye neVRRM yesixhobo se-thyristor:

Kufuneka kube ngamaxesha angama-2-3 owona mbane uphezulu we-Um owenziwe licandelo ngokwenene, oko kukuthi, VDRM/RRM=(2-3)UM. Amaxabiso e-UM ahambelana neesekethe ezahlukeneyo zokulungiswa ziboniswa kwiThebhile 1.

(2) Ilinganiswe kwi-IT yangoku ye-IT (AV) yesixhobo se-thyristor:

Ixabiso le-IT (AV) le-thyristor libhekiselele kumyinge wexabiso le-ine frequency ye-sine i-half-wave, kunye ne-ITRMS = 1.57IT(AV) ehambelana nayo. Ukuze kuthintelwe ukuba icandelo lingonakaliswe ngokugqithiswa ngexesha lokusebenza, ixabiso langempela elisebenzayo elihamba ngecandelo kufuneka lilingane ne-1.57IT (AV) emva kokuphindaphindwa kokhuseleko lwe-1.5-2. Kucingelwa ukuba umndilili womthwalo wangoku wesekethe yokuhlaziya yi-Id kunye nexabiso elisebenzayo langoku oqukuqelayo kwisixhobo ngasinye yi KId , umlinganiselo okwimeko yangoku wesixhobo esikhethiweyo kufuneka :

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

I-Kfd yi-coefficient yokubala. Kwi-angle yolawulo α= 0O , amaxabiso e-Kfd phantsi kweesekethe zokulungisa ezahlukeneyo ziboniswa kwiThebhile 1.

Itheyibhile 1: Owona mbane uphezulu wencopho ye-UM yesixhobo sokuhlaziya kunye ne-coefficient yokubala i-Kfd yomndilili kwimeko yangoku.

Qaphela : I-U2 lixabiso elisebenzayo lombane wesigaba sesibini se-transformer ye-loop engundoqo; i-half-wave inductive load circuit enye ine-freewheeling diode.

Xa ukhetha ixabiso le-IT (AV) yecandelo, imodi yokutshatyalaliswa kobushushu yecandelo kufuneka iqwalaselwe. Ngokubanzi, ixabiso langoku elilinganisiweyo lecandelo elifanayo lokupholisa umoya liphantsi kunelo lokupholisa kwamanzi; kwimeko yokupholisa kwendalo, umbane olinganisiweyo wecandelo kufuneka uncitshiswe kwisinye kwisithathu somgangatho wokupholisa.