Maitiro ekusarudza nemazvo silicon inodzorwa zvikamu zve kudonhedzwa kunyorera vira

Sarudzo chaiyo yemagetsi emagetsi emagetsi akadai se thyristors uye rectifiers ane kukosha kukuru kuti ave nechokwadi chekuvimbika kweiyo induction yekunyungudutsa muchoto uye kuderedza mutengo weiyo induction melting furnace. Kusarudzwa kwezvikamu kunofanirwa kunyatso tarisa zvinhu zvakaita senzvimbo yekushandiswa kwayo, nzira yekutonhodza, rudzi rwedunhu, zvivakwa zvekutakura, nezvimwe, uye funga nezvehupfumi pasi pemamiriro ekuona kuti maparamendi ezvikamu zvakasarudzwa ane miganho.

Sezvo nzvimbo dzekushandisa dzemagetsi emagetsi emagetsi akafara kwazvo, uye iwo chaiwo mafomu ekunyorera akasiyana, anotevera anongotsanangura kusarudzwa kwezvikamu zvethyristor mumaseketi ekugadzirisa uye imwe-chikamu chepakati frequency inverter maseketi.

1 Rectifier redunhu mudziyo kusarudzwa

Simba frequency rectification ndeimwe yeanonyanya kushandiswa minda yeSCR zvikamu. Sarudzo yechikamu inonyanya kufunga nezvayo yakayerwa voltage uye yakayerwa ikozvino.

(1) Iyo yekumberi uye inodzosera kumashure epamusoro voltages VDRM uye VRRM ye thyristor mudziyo:

Inofanira kuva 2-3 nguva dzepamusoro peak voltage UM iyo chikamu chaicho chinotakura, kureva, VDRM/RRM=(2-3)UM . Izvo zviyero zveUM zvinoenderana nemasekete akasiyana ekugadzirisa anoratidzwa muTafura 1.

(2) Yakatemerwa pa-state ikozvino IT (AV) yeiyo thyristor mudziyo:

Iyo IT (AV) kukosha kwe thyristor inoreva kukosha kweavhareji yesimba frequency sine hafu-wave, uye inoenderana inoshanda ITRMS=1.57IT(AV) . Kuti udzivise chikamu kuti chisakanganiswa nekupisa panguva yekushanda, iyo chaiyo yakakosha kukosha inoyerera kuburikidza nechikamu inofanira kuenzana ne1.57IT (AV) mushure mekuwedzerwa nekuchengetedzwa kwe1.5-2. Tichifunga kuti avhareji yekuremerwa ikozvino yerectifier wedunhu iId uye kukosha kwazvino kuyerera kuburikidza nemudziyo wega wega KId, yakayerwa pa-nyika ikozvino yechishandiso chakasarudzwa inofanira kuva:

IT(AV)=(1.5-2)KId/1.57=Kfd*Id

Kfd ndiyo coefficient yekuverenga. Pakona yekudzora α= 0O , iyo Kfd kukosha pasi peakasiyana ekugadzirisa maseketi anoratidzwa muTafura 1.

Tafura 1: Iyo yakanyanya peak voltage UM yezvekugadzirisa mudziyo uye kuverenga coefficient Kfd yeavhareji pa-nyika ikozvino.

Cherechedza: U2 ndiyo yakakosha kukosha kwechipiri chikamu voltage cheiyo main loop transformer; iyo imwechete hafu-wave inductive load circuit ine freewheeling diode.

Paunosarudza chikamu cheIT (AV) kukosha, nzira yekupisa yekupisa yechikamu inofanirawo kutariswa. Muzhinji, chiyero chemazuva ano chechikamu chimwechete chekutonhora kwemhepo yakaderera pane iyo yekutonhora kwemvura; muchiitiko chekutonhora kwechisikigo, iyo yakayerwa ikozvino yechikamu inofanira kuderedzwa kusvika kune chimwe chetatu cheyakajairwa kutonhora mamiriro.