Abahlinzeki abane be-quadrant frequency converter bakukhumbuza ukuthi iziguquli eziningi ezijwayelekile zisebenzisa amabhuloho e-diode rectifier ukuze ziguqule amandla e-AC zibe amandla e-DC, bese zisebenzisa ubuchwepheshe be-IGBT inverter ukuguqula amandla e-DC abe amandla e-AC ane-voltage eguquguqukayo kanye nemvamisa. Lolu hlobo lwesiguquli sefrikhwensi lungasebenza kuphela kumodi kagesi, ngakho lubizwa ngokuthi i-quadrant frequency converter. Ngenxa yokusetshenziswa kwebhuloho le-diode rectifier kusiguquli se-quadrant frequency frequency, akunakwenzeka ukufeza ukugeleza kwamandla okuqondiswa kabili, ngakho-ke akunakwenzeka ukubuyisela amandla asuka ohlelweni lwempendulo yemoto kugridi yamandla. Kwezinye izinhlelo zokusebenza lapho amamotho kagesi edinga ukunika impendulo amandla, njengamakheshi, ama-elevator, namasistimu e-centrifuge, iyunithi yamabhuleki ukumelana ingangezwa kuphela kusiguquli sefrikhwensi yamaquadrant amabili ukuze kusetshenziswe impendulo yamandla evela enjini kagesi. Ngaphezu kwalokho, kwezinye izinhlelo zokusebenza zamandla aphezulu, amabhuloho okulungisa i-diode abangela ukungcoliswa okubucayi kwe-harmonic kugridi yamandla.
Ukuze unike amandla isiguquli semvamisa ukuthi sisebenze esimweni sokukhiqiza amandla, siphendule amandla okubhuleka kugridi, sinciphise ukusetshenziswa kwamandla, futhi sifeze ukusebenza kwamaquadrant amane, ngokuvamile kunezindlela ezimbili:
1. Hlomisa isiguquli sefrikhwensi ngeyunithi eyodwa noma ngaphezulu yempendulo yamandla, engaxhunywa ngokuhambisana ukuze ibuyisele amandla kugridi, kodwa ayikwazi ukulungisa ngokuzenzakalelayo i-voltage yebhasi, ama-harmonics, nezici zamandla. Le ndlela inezindleko eziphansi futhi inganciphisa ukusetshenziswa kwamandla ngokwezinga elithile, kodwa umphumela uphansi uma kuqhathaniswa, futhi ayinawo umsebenzi wokuthuthukisa noma wokuvikela wokusebenza kwesiguquli semvamisa;
2. Ukuhlomisa isiguquli sefrikhwensi ngesiphetho sangaphambili esisebenzayo, esivame ukwaziwa ngokuthi i-AFE, kungafinyelela ukulungiswa okulawulwayo kanye nempendulo yamandla. I-voltage yebhasi kanye nesici samandla kungashintshwa, kunciphise ngempumelelo ama-harmonics. Phakathi kwebanga elithile, umthelela wokushintshashintsha kwamandla kagesi webhasi ungashaywa indiva. Le ndlela iyasebenza, kodwa izindleko ziphakeme kakhulu. Ivamise ukusetshenziswa ezimeni lapho izidingo zesici samandla ziphezulu noma kudingeka ukubhuleka njalo, njengamakheshi, ukuphakamisa nokwehlisa imayini, ukuphakamisa nokwehlisa, njll.
Isingeniso se-Active Front End AFE
Isiphetho esisebenzayo singafinyelela ukulungiswa okulawulwayo kanye nempendulo yamandla. I-MD050 yethu iyisiphetho esisebenzayo, esihlukile kumayunithi ajwayelekile wempendulo yamandla. Iphrosesa yangaphambili esebenzayo iyi-chip ye-DSP enesivinini esiphezulu engafinyelela ukulungiswa okulawulekayo. Isici samandla siphezulu kakhulu, ngokuvamile sifika ku-99%, futhi i-harmonic incane kakhulu, ngokuvamile ingaphansi kuka-5%. I-voltage yebhasi iyalungiseka, futhi noma i-voltage yokufaka ishintshashintsha, ingaqinisekisa i-voltage yebhasi engashintshi phakathi kwebanga elithile.