AC tsav fais fab
Excitation yog ze rau lub zog ntawm AC lub zog, thiab muab lub hwj huam reactive yuav tsum tau them tus nqi. Vim li no, qhov fais fab ntawm AC motor yog qhov tseem ceeb tshaj plaws los ntsuas nws qhov kev lag luam. Nws muaj peb yam tseem ceeb rau cov teebmeem ntawm qhov qis zog ntawm kev ua haujlwm ntawm cov haujlwm:
● Generators, transformers, thiab cov khoom siv kis tau los ntawm kVA (muaj peev) hloov kW (active power) vim lawv cov khoom poob thiab cua sov yeej txiav txim siab los ntawm cov khoom siv hluav taws xob thiab tam sim no, thiab muaj kev ywj pheej. Qhov loj me me thiab tus nqi ntawm cov khoom siv yog sib npaug ntawm nws cov peev txheej. Vim li no, cov peev nyiaj yuav tsum tau rau cov generators, transformers, thiab cov khoom siv kis tau los muab qee yam ntawm lub hwj chim muaj zog yog ntxim li cuam tshuam rau feem zog.
• Tsawg zog yuav tsum txhais tau tias tam sim no thiab I2R noj nyob rau hauv kev tsim hluav taws xob thiab cov khoom siv kis mus los.
● Tsawg zog yuav ua rau kev hloov hluav taws xob tsis zoo ntxiv.
Tawm fais fab thiab muaj zog
Los ntawm txoj kev sib raug zoo ntawm cov hluav taws xob reactive thiab kev tsim ntawm sib nqus cov plhaub, qhov teeb meem uas cuam tshuam lub hwj chim muaj zog yuav tsum tau los ntawm lub tshuab yuav pom tau yooj yim. Raws li nrog rau lwm yam khoom siv electromagnetic, qhov sib txuam sib nqus cov pa yuav tsum tau rau lub tshuab ua haujlwm yuav tsum yog tsim los ntawm cov khoom siv magnetization tam sim no. Txawm hais tias tsis yog qhov uas tam sim no magnetizing tam sim no nyob hauv stator winding los yog hauv rotor winding, tsis muaj qhov sib txawv hauv qhov sib luag ntawm cov hluav taws xob thiab cov txheej txheem hloov tshiab.
• Hauv ib lub tshuab hluav taws xob, tsis muaj teeb meem dab tsi uas siv los ua kom dhau qhov kev hloov siab tam sim no nyob rau hauv qhov kev hloov tshuab hluav taws xob, tsis muaj qhov sib txawv ntawm qhov tsim hluav taws xob ntau. Qee zaum, txhua qhov kev sib tw yuav muab ib qho excitation ib nrab. Yog hais tias tag nrho los yog ib feem ntawm qhov sib dhos ntawm AC lub zog, cov tswv yim ntawm qhov sib tw yuav tsum muaj cov hluav taws xob tsis sib luag vim tias tam sim no muaj teeb meem tom qab qhov hluav taws xob ntawm 90 °. Cov kab mob sib zog khaus uas tsim kom muaj zog ntawm lub cev muaj zog.
• Hauv kev xa hluav taws xob, qhov tsuas yog qhov kev cia siab ntawm yog kev tawm tswv yim ntawm stator. Vim li no, lub tshuab ua kom qhov qis yuav tsum ua haujlwm nyob rau hauv lub xeev qhov sib txawv ntawm lub zog, uas yog tsawg tsawg ntawm tsis muaj thauj khoom thiab nce mus rau 85% txog 90% los yog siab tshaj ntawm kev thauj khoom. Qhov kev txhim kho nyob rau hauv qhov zoo tshaj yuav yog los ntawm qhov nce hauv qhov yuav tsum tau ua kom muaj zog thaum lub pob nce.
• Rau cov tshuab ua synchronous, tej zaum yuav muaj ob qhov chaw ntawm kev cia siab: hloov tam sim no hauv qhov chaw khawb khaus los yog cov ncaj qha tam sim no hauv thaj chaw kev sib tw. Yog hais tias tam sim no ntawm kev sib tw ntawm lub tshav pob tsuas yog txaus los muab cov hlau nplaum uas yuav tsum tau muaj, qhov khoob khuab qaum tsis tas yuav tsum tau muaj cov khoom ntim khoom tam sim no los yog cov fais fab uas tsis tshua muaj zog, thiab lub tshuab ua haujlwm ntawm kev sib raug zoo ntawm ib qho. Yog hais tias qhov kev txo tam sim no raug txo, qhov ntawd yog, lub cev qis dua, qhov tsis muaj zog ntawm qhov sib txawv ntawm qhov sib txawv yuav tsum tau them nyiaj los ntawm lub qhov rooj hlua khi, kom lub cav yuav ua haujlwm nyob rau hauv lub xeev muaj zog. Yog hais tias qhov chaw nce zuj zus ntxiv, qhov ntawd yog, lub cev muaj zog heev tshaj, qhov sib txawv ntawm cov hlau nplaum yuav tsum tau los ntawm kev sib zog, thiab ib qho kev tivthaiv tau tshwm sim nyob rau hauv cov khoom siv tam sim no, thiab lub tshuab ua haujlwm hauv lub xeev muaj zog .
