Yintoni i-zero crossing scr power regulator?

Ulawulo lokuwela u-Zero yindlela eqhelekileyo yokulawula iumlawuli wamandla, ngakumbi xa umthwalo luhlobo lokumelana.

I-thyristor ivuliwe okanye ivaliwe xa i-voltage ingu-zero, kwaye amandla anokulungiswa ngokulungelelanisa umlinganiselo we-thyristor kunye nexesha lokuvala.Imowudi yokulawula ukuwela i-Zero sinokwahlula ngokwexesha elimiselweyo elinguziro lolawulo lokuwela kunye nexesha eliguquguqukayo elinguziro lokuwela ulawulo ngeendlela ezimbini.

Ixesha elimiselweyo Imowudi yokulawula ukuwela i-zero (i-PWM i-zero crossing): Imowudi yokulawula i-zero-ixesha elimiselweyo kukulawula umlinganiselo wamandla omthwalo ngokulungelelanisa umjikelo wokuyeka umsebenzi kwixesha elimiselweyo.Ngenxa yokuba ivuliwe kwaye icinywe kwindawo ye-zero yonikezelo lwamandla, kwiyunithi ye-wave epheleleyo, akukho nxalenye yesiqingatha samaza, ayiyi kuvelisa ukuphazamiseka kwe-frequency ephezulu, kwaye i-factor factor inokufikelela, ngoko inamandla kakhulu. -ukugcina.

Ixesha eliguquguqukayo ulawulo lokuwela u-zero (i-CYCLE i-zero yokuwela): Ixesha eliguquguqukayo imowudi yokulawula ukuwela i-zero ikwayi-off-off kulawulo lokunqumla kwi-zero yonikezelo lombane.Xa kuthelekiswa nemodi ye-PWM, akukho xesha lokulawula elisisigxina, kodwa ixesha lokulawula lifutshane kangangoko kunokwenzeka, kwaye i-frequency ihlukaniswe ngokulinganayo ngokwepesenti yokuphuma ngaphakathi kwexesha lokulawula.Kwakhona kwi-wave epheleleyo njengeyunithi, akukho nxalenye yesiqingatha samaza, inokufikelela kumandla ombane, kodwa iphinde igcine umbane.

Ukusuka kulo mzobo ungezantsi, sinokubona ngokucacileyo ukuba phantsi kwendlela yokulawula ukuwela i-zero, ukuze kulungiswe amandla emveliso.abalawuli bamandla, sinokufezekisa injongo yokulawula amandla ngokulungelelanisa inani lemijikelezo ye-SCR kunye nokucima, into elula kakhulu.Nangona kunjalo, siya kubona kwakhona ukuba ulawulo lwamaza ombane lufanelekile kuphela kwizihlandlo apho ukuchaneka kokulawula kungabikho phezulu, ukuba iimfuno zokulawula ziphezulu, ngoko indlela yokulawula i-frequency ayifanelekanga.