Ii-Variable Frequency Drives (VFDs): ULawulo lweMoto oluBanzi kunye noKhuseleko
Iidrive Frequency Drives (VFDs): ULawulo lweMoto oluBanzi kunye noKhuseleko
Intshayelelo
Ii-Variable Frequency Drives (VFDs) zizixhobo ezinamandla eziyilelwe ukomeleza ukusebenza kunye nokusebenza kakuhle kweemotor ekuqaleni ezilungiselelwe ukusebenza ngesantya esinye. Ngaphaya komsebenzi wabo ophambili, ii-VFDs zidlala indima ebalulekileyo ekukhuseleni iimoto kuluhlu lweempazamo ezinokuthi zibe kho, kubandakanywa i-overcurrent, overvoltage, undervoltage, undercurrent, stalling, phase reversal, ground faults, and phase-to-phase shorts. Kwiinkqubo zamandla ezigaba ezithathu, ukudityaniswa kwee-VFDs kunokukhokelela kwinzuzo enkulu yokusebenza kakuhle, ukuzibeka njengesisombululo esineendleko eziphezulu kumashishini ahlukeneyo.
Izinto eziluncedo kwiiVFDs
Ii-VFDs zibonelela ngeenzuzo ezininzi, kwaye ukonga amandla yeyona nto ibalulekileyo, kuxhomekeke kwisicelo esithile. Ngokuqhelekileyo zisetyenziswa kwiifeni ze-centrifugal, iimpompo, iicompressors, kunye nazo naziphi na ezinye iinkqubo zemoto ezinesantya esisisigxina. Ngokuphucula ukusebenza kakuhle kweemoto ze-AC, ii-VFDs zinegalelo kubomi obude bokusebenza kunye nokunciphisa iimfuno zokulondolozwa. Ngaphaya koko, ulawulo lwesantya esichanekileyo lunciphisa iimpazamo zokusebenza kunye nenkcitho. Xa kujongwa isakhono sabo sokugcina amandla, imbuyekezo kutyalo-mali kwii-VFDs inokufumaneka ngexeshana elifutshane, ukusuka kwiinyanga ezimbalwa ukuya kwiminyaka embalwa.
Iingqwalasela ezongezelelweyo zoFakelo lweVFD
Ukufakela i-VFD kubandakanya okungaphezulu nje kokuyidibanisa nemoto. Ngokuxhomekeke kwiimfuno ezithile, izinto ezongezelelekileyo ezifana nezihluzo zokuphazamiseka kombane, izihluzi zerediyo zamaza kanomathotholo, iindawo ezivaliweyo ezinkulu, iintambo ezintsha, okanye iintambo zombane/umthwalo wereactor zingafuneka. Ukwenza i-VFD ibe neempawu ezifana nezibane zokulingwa, iindawo zokudlula, izixhobo zokunciphisa i-harmonic, izixhobo zokucinezela amandla ombane wethutyana (TVSS), okanye izihluzi ze-dv/dt nazo ziyacetyiswa ukuqinisekisa ukusebenza ngokupheleleyo. Ukungahoywa kwezi zongezo kunokukhokelela ekungasebenzi kakuhle okanye ukonakala kwemoto.
Izinto ekufuneka ziqwalaselwe xa ukhetha i-VFD
Xa ukhetha i-VFD kwizigaba ezithathu zokusetyenziswa kwamandla, izinto ezininzi kufuneka zithathelwe ingqalelo:
- IiAmps zomthwalo ogcweleyo (FLA): Ibalulekile ekukhetheni ubungakanani obufanelekileyo beVFD.
- I-Voltage: Izinketho ziquka i-208 VAC, i-230/240 VAC, okanye i-460/480 VAC.
- Ukwahluka kweVoltage/Frequency
- Qhuba amabhanti
- RPMs
- Uhlobo Lomthwalo
- Uluhlu lwesantya
- iTorque efunekayo
- Umthamo wangoku wokuLayisha
- Indlela yokulawula
- Inverter Rating
Imisebenzi yeVFD
I-electronics ngaphakathi kweVFD iguqulela isigaba esinye sangoku kwi-DC isebenzisa ii-diode, kwaye isebenzise ii-capacitors ukuvelisa imveliso ye-AC efunekayo. La mandla e-pulsed alingisa i-AC yangoku. Ii-VFDs zixhasa imisebenzi emine yokuqhuba:
- Ukuqhubela phambili ngemoto (isantya esilungileyo kunye netorque)
- Ukubuyisela umva imoto (isantya esibi kunye netorque)
- Ukunyathela phambili (isantya esilungileyo kunye netorque engalunganga)
- Ukubuyisela umva isiqhoboshi (isantya esibi kunye netorque elungileyo)
Qala ngokuzenzekela & Misa
Uninzi lwee-VFDs ziyilelwe ukuqalisa ngokuzenzekelayo, ukuqalisa nge-frequency ephantsi kunye ne-voltage ukuthintela imisinga yokungena kunye nemiba yoomatshini ehambelana nokuqalisa ngokuthe ngqo kwi-line. Ukuseta i-wiring kufana neeyunithi zesigaba esinye kodwa kunye nezikhokelo eziguquliweyo. Ukubeka i-L1, i-L2, kunye ne-L3 kwikontraka iqalisa i-drive kwaye iguqule imveliso kwisantya esifunwayo, ivumela i-motor ukuba ivelise i-torque ebalulekileyo. Xa umisa, i-frequency kunye ne-voltage iyancipha ngokuthe ngcembe de i-motor icime.