Tib yamlub cev muaj zog peb theemtuaj yeem txuas nrog los ntawm kev sib txuas peb sab, sib raug rau qhov hluav taws xob qis; Nws kuj tseem tuaj yeem txuas nrog raws li txoj kev sib txuas hnub qub, sib raug rau qhov hluav taws xob siab; Qhov hluav taws xob siab yog 3 npaug ntawm cov hauv paus plaub fab ntawm qhov hluav taws xob qis. Piv txwv li, lub cev muaj zog 380V nrog kev sib txuas peb sab, yog tias txuas nrog los ntawm kev sib txuas hnub qub, qhov hluav taws xob sib xws yog 660V. Qhov kev sib txuas tshwj xeeb yuav tsum sib raug rau qhov hluav taws xob muab hluav taws xob.
Lub cev muaj zog txuas nrog lub hnub qub tsis tsim kev ncig sab hauv, uas yog qhov zoo dua li qhov kev sib txuas peb sab.
Vim tias peb theem winding tsis tuaj yeem sib npaug kiag li, yeej ib txwm muaj qhov sib txawv me me hauvLub cev muaj zog 3-theemQhov hluav taws xob, uas yuav tsim ib qho kev ncig hauv lub duab peb ceg, ua rau lub cev muaj zog cua sov thiab txo qis kev ua haujlwm. Qhov kev sib txuas peb ceg kuj tau ua rau cov laj thawj keeb kwm, uas yog, qhov hu ua lub hnub qub-peb ceg pib, lub hnub qub-peb ceg pib tuaj yeem txo qhov tam sim no pib, tab sis nws yuav txo qhov pib torque, yog li nws tsuas yog siv tau rau hauv lub xeev pib lub teeb lossis tsis muaj thauj khoom.
Peb pom tias lub tshuab cua txias tuaj yeem pib los ntawm lub hnub qub-peb ceg, tab sis yeej tsis muaj lub hnub qub-peb ceg pib ntawm lub crane, qhov kev nqa feem ntau yog pib los ntawm winding rotor series tsis kam, vim li cas thiaj ua teeb meem ntau, muaj ib qho laj thawj. Tau kawg, cov xwm txheej tam sim no ntawm kev hloov pauv zaus pib tau daws cov teeb meem zoo li no.
Txawm hais tias peb-xaim lossis plaub-xaim system (tsis muaj av), lub kaum sab xis hluav taws xob ntawm peb-theem voltages yog 120 degrees theem sib txawv nyob rau hauv cov xwm txheej zoo tagnrho. Nws xav tias vim muaj kev cuam tshuam tsis tu ncua, 3N harmonics raug tsim nyob rau hauv theem winding ntawm lub davhlau ya nyob twg load, 3N * 120 = 360N, qhia tias peb-theem 3N harmonic voltage theem yog tib yam, yog tias qhov amplitude yog tib yam, 3N harmonics ntawm peb pawg ntawm kab voltage yuav raug tshem tawm tag nrho, uas yog, tsis muaj integer ntau harmonics ntawm 3 hauv lub voltage ntawm cov kab.
Rau qhov kev sib txuas ntawm daim duab peb sab, cov harmonic currents saum toj no 3N hauv tib theem raug luv luv hauv daim duab peb sab no thiab khaws cia rau hauv daim duab peb sab no los tsim ib qho kev ncig tsis kawg. Yog li ntawd, rau qhov muaj harmonics, qhov kev sib txuas ntawm daim duab peb sab lossis lub hnub qub tuaj yeem xaiv raws li seb 3N harmonics puas ua tau hauv qhov voltage lossis tam sim no.
Lub sijhawm tshaj tawm: Cuaj hlis-19-2024