Uhlahlelo kunye noKhetho lweSikimu soLungiso lwaMandla Induction Ubushushu zomlilo

Ekubeni ngexesha lokufudumala kwenkqubo yokufudumala, iiparitha ezilinganayo zomthwalo ziya kutshintsha kunye nobushushu kunye nokunyibilika kwentlawulo kunye neemfuno zenkqubo yokufudumala, ukunikezelwa kwamandla okufudumeza kwe-induction kufuneka kukwazi ukulungelelanisa amandla omthwalo. Ekubeni ii-inverters ze-resonant series zineendlela ezininzi ezahlukeneyo zohlengahlengiso lwamandla, kufuneka senze ukhetho olufanelekileyo kwinkqubo yophuhliso ngokwezicelo zangempela kunye neemfuno zokusebenza.

Iindlela zohlengahlengiso lwamandla enkqubo zinokwahlulwa ngokubanzi zibe ziindidi ezimbini: uhlengahlengiso lwamandla ecala le-DC kunye nohlengahlengiso lwamandla ecala le-inverter.

Ulawulo lwamandla ecala le-DC kukulungelelanisa amandla emveliso ye-inverter ngokulungelelanisa i-amplitude yegalelo lombane we-inverter link kwicala lamandla e-DC ye-inverter, oko kukuthi, imowudi yokulawula amandla ombane (PAM). Ngale ndlela, umthwalo unokusebenza kwi-resonance okanye i-frequency yokusebenza kufutshane ne-resonance ngokusebenzisa amanyathelo okuvala isigaba.

Kukho iindlela ezimbini zokulungisa i-voltage ephumayo yesithando sokufudumala se-induction: ukulungiswa okulawulwa yisigaba okanye ukulungiswa okungalawulwayo okulandelwa kukunqunyulwa.

Ulawulo lwamandla ecala lokuguqula i-inverter kukutshintsha imo yokusebenza yemveliso ye-inverter ngokulawula iimpawu zokutshintsha kwezixhobo zamandla ze-inverter ikhonkco kumlinganiselo wokuguqula, ukuze uqonde ukulawulwa kwamandla okukhutshwa kwe-inverter.

I-modulation yamandla ecala le-inverter inokwahlulwa ibe yi-pulse frequency modulation (PFM), i-pulse density modulation (PDM), kunye ne-pulse phase shift modulation. Xa iskimu sohlengahlengiso lwamandla ecala le-inverter samkelwa, ukulungiswa okungalawulwayo kungasetyenziswa kwicala le-DC, elenza lula i-rectifier induction heat furnace kunye nokuphucula i-grid-side power factor. Kwangaxeshanye, isantya sokuphendula sohlengahlengiso lwamandla e-inverter side sikhawuleza kuneso se-DC side.

Ukulungiswa kokulawulwa kwesigaba kunye nohlengahlengiso lwamandla okufudumala isithando somlilo silula kwaye sivuthiwe, kwaye ulawulo lufanelekile; ukusebenza kakuhle kunye nokuthembeka kokunikezelwa kwamandla okulungelelaniswa kombane we-chopper kuya kuncitshiswa kwiimeko eziphezulu zamandla, kwaye akufanelekanga ekusebenzeni okuqhelekileyo kombane. I-Pulse frequency modulation iya kuba nefuthe elikhulu kwi-workpiece yokufudumeza ngenxa yokutshintsha okuphindaphindiweyo ngexesha lenkqubo yokulungelelanisa amandla; ukumodareyitha koxinzelelo lwe-pulse kunozinzo olulambathayo lokusebenza kumandla avaliweyo kwizihlandlo ezijikelezileyo, kwaye zibonakalisa indlela yohlengahlengiso olunyathelweyo lwamandla; I-pulse phase shift shift uhlengahlengiso lwamandla luya Ukwandisa ilahleko yamandla, njengokusetyenziswa kokutshintsha okuthambileyo, kuya kwandisa ubunzima besithando sokufudumala sokufudumala.

Ukudibanisa izinto eziluncedo nezingeloncedo kwezi ndlela zintlanu zohlengahlengiso lwamandla, zidityaniswe nomsebenzi wesi sifundo kwiimeko zamandla aphezulu, khetha ukusebenzisa ulungiso olulawulwa yisigaba se thyristor ukulungiselela uhlengahlengiso lwamandla, kwaye ufumane ikhonkco eliguquguqukayo le-DC yemveliso yombane wonikezelo lombane ngokuhlengahlengisa thyristor conduction angle. Ngaloo ndlela utshintsha amandla emveliso yekhonkco yokuguqula. Olu hlobo lohlengahlengiso lwamandla ombane wokufudumeza isithando somlilo lulula kwaye luvuthiwe, kwaye ulawulo lufanelekile.