Mphamvu yosinthira yoyendetsedwa ndi PFC yayikulu

PFC ndi tanthauzo la kukonza mphamvu, lomwe limagwiritsidwa ntchito makamaka pofotokoza momwe mphamvu zamagetsi zimagwiritsidwira ntchito bwino ndi zinthu zamagetsi. Mphamvu zamagetsi zikakwera, mphamvu zamagetsi zimagwirira ntchito bwino kwambiri.

Pali mitundu iwiri ya PFC: passive PFC ndi active PFC. Passive PFC nthawi zambiri imagwiritsa ntchito njira yolipirira inductance kuti ichepetse kusiyana kwa gawo pakati pa mphamvu yoyambira ndi voltage ya AC input kuti ikonze mphamvu, koma mphamvu ya passive PFC si yayikulu kwambiri ndipo imatha kufika pa 0.7 ~ 0.8 yokha; Active PFC imapangidwa ndi inductance, capacitance ndi zida zamagetsi, imatha kufika pa 0.99. Ndi yaying'ono ndipo imatha kufika pa mphamvu yayikulu, koma mtengo wake ndi wokwera kuposa wa passive PFC.

PFC nthawi zambiri imagwiritsidwa ntchito ngati magetsi ogwiritsira ntchito mu PC, ndipo PFC ili ndi makhalidwe otsatirawa:

1) Voltage yolowera ikhoza kukhala kuyambira 90V mpaka 270V;

2) Mphamvu ya mzere ndi yokwera kuposa 0.98, ndipo ili ndi ubwino wa kutayika kochepa komanso kudalirika kwakukulu;

3) PFC ya IC ingagwiritsidwenso ntchito ngati magetsi othandizira, kotero chosinthira choyimirira nthawi zambiri sichifunika pakugwiritsa ntchito dera logwira ntchito la PFC;

4) Mphamvu yotuluka siisinthasintha ndi mphamvu yolowera, kotero mphamvu yotuluka yokhazikika kwambiri ingapezeke;

5) Mphamvu ya DC voltage ripple ya active PFC ndi yaying'ono kwambiri ndipo imakhala ndi sine wave ya 100Hz / 120Hz (kawiri kuposa mphamvu). Chifukwa chake, magetsi omwe amagwiritsa ntchito active PFC safunika kugwiritsa ntchito filter capacitor yayikulu.

Active PFC imapangidwa ndi inductance, capacitance ndi zida zamagetsi. Ili ndi voliyumu yaying'ono. Imasintha mawonekedwe amagetsi kudzera mu IC yapadera kuti igwirizane ndi kusiyana kwa gawo pakati pa magetsi ndi magetsi. Active PFC imatha kukwaniritsa mphamvu yayikulu - nthawi zambiri yoposa 98%, koma mtengo wake ndi wokwera kwambiri. Kuphatikiza apo, active PFC ingagwiritsidwenso ntchito ngati magetsi othandizira. Chifukwa chake, pogwiritsa ntchito active PFC circuit, transformer yoyimirira nthawi zambiri siifunikira, ndipo kufalikira kwa mphamvu ya DC yotuluka ya active PFC ndi kochepa kwambiri. Mphamvu iyi sifunikira kugwiritsa ntchito capacitor yayikulu yoyatsira.

Posachedwapa tayambitsa magetsi osinthira a 2000W ndi 3000W ndi PFC. Mtengo wake ndi wabwino kwambiri. Ndi wotsika mtengo kwambiri kuposa magetsi omwewo omwe ali pamsika, ndipo magwiridwe antchito ake ndi okhazikika. Ngati mukufuna, chonde titumizireni uthenga. Zikomo!