nkhani

PakatiKusintha kwamagetsi kwa PFC, kusintha kwamagetsi komwe kumayendetsedwa ndi magetsi ndikofunikira kwambiri.Kusintha kwamagetsi mu PFC sikusiyana kwambiri ndi magetsi osinthira wamba, koma pali kusiyana kwamagetsi.Mphamvu zosinthira wamba zimafunikira magetsi okonzanso 220V, pomwe magetsi a PFC amayendetsedwa ndi B+PFC.

Pambuyo pokonzanso, palibe fyuluta capacitor yomwe imawonjezedwa, ndipo voteji yosasunthika yosasunthika yomwe imagwiritsidwa ntchito ngati mphamvu ya chopper.Popeza mpweya wabwino wa chopper "wadulidwa" kukhala mawonekedwe amakono, mawonekedwe a mawonekedwe ake ndi awa:
1. Mawonekedwe amakono ndi olekanitsidwa, ndipo envelopu yake ndi yofanana ndi mawonekedwe a voliyumu, ndipo gawo la envelopu ndi mawonekedwe amagetsi ndi ofanana.
2. Chifukwa cha zotsatira za kudula, mphamvu ya DC yothamanga theka imakhala yothamanga kwambiri (yosankhidwa ndi mafupipafupi odula, pafupifupi 100khz) "AC" mphamvu.Mphamvu ya "AC" yapamwambayi iyenera kukonzedwanso isanayambe kuyendetsedwa ndi kugwiritsa ntchito mphamvu kwa PWM.
3. Kuchokera pamawonedwe ambiri a magetsi akunja, mphamvu yamagetsi imakwaniritsa kuti AC voteji ndi AC panopa ali mu gawo ndi voteji ndi ma waveforms panopa mogwirizana ndi sinusoidal waveform, amene osati kuthetsa vuto la mphamvu factor compensation; komanso amathetsa mavuto a electromagnetic compatibility and electromagnetic interference.

Mphamvu ya "alternating current" yothamanga kwambiri imakonzedwanso ndi diode yokonzanso ndikusefedwa mumagetsi olunjika kenako ndikuperekedwa kumagetsi osinthira a PWM.Mphamvu ya DC iyi imatchedwanso B+PFC.Mphamvu yamagetsi ya B+PFC yopangidwa ndi chopper nthawi zambiri imakhala yokwera kuposa +300V pambuyo pakukonzanso ndi kusefa kwa 220 AC koyambirira.Chifukwa chake ndi chakuti mzere wothamanga kwambiri umasankhidwa, mzere wa mzere wa inductor ndi wochepa, ndipo mzere wamagetsi umatsika pang'ono.Mphamvu ya fyuluta capacitor ndi yaying'ono, ndipo zotsatira zosefera ndi zabwino, ndipo pali zabwino zambiri monga zofunikira zochepa za chubu chosinthira cha PWM chotsika.

Pakadali pano, mu gawo losinthira magetsi la PFC, chubu chowaza chomwe chimagwira ntchito ngati chosinthira chili ndi njira ziwiri zogwirira ntchito:
1. Njira yopititsira patsogolo (CCM): Kuthamanga kwa chubu chosinthira kumakhala kosalekeza, ndipo kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwekazi ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kamwemwemwemwemwemwemwemwedhamwedhakita kutsilingalingarire likhazikitse
2. Discontinuous conduction mode (DCM): Mafupipafupi ogwiritsira ntchito chubu cha chopper amasintha ndi kukula kwa magetsi odula.

TheKusintha kwamphamvu kwa PFCgawo ndi chisangalalo cha gawo la PWM losinthira magetsi mu gawo lamagetsi osinthira magetsi onse amamalizidwa ndi dera lophatikizika, ndipo IC imodzi imatha kumaliza kupanga.