Kev cais ntawm AC motors
Kev cais ntawm AC motors
Raws li kev txheeb cais, kev cais ntawm AC motors tuaj yeem ua tau raws li ob txoj hauv qab no:
Los ntawm kev ua haujlwm
AC motors feem ntau muab cais ua cov tsav tsheb, AC motors, thiab cov koob yees duab synchronous raws li lawv txoj haujlwm. Vim yog qhov hloov ntawm kev ua haujlwm ntawm lub tshuab ua haujlwm, tib lub cav yuav raug siv los ua ob qho tib si thiab lub tshuab hluav taws xob.
Nws tsis yog tseeb heev hais tias lub tshuab yog muab faib ua ib lub tshuab hluav taws xob thiab lub tshuab. Txawm li cas los xij, qee cov motors tsuas yog cov lag luam ua cov generators, thiab qee cov motors tsuas yog ua haujlwm.
Los ntawm ntau yam
AC motors muab faib ua ob pawg: synchronous motors thiab asynchronous motors. Cov kev sib hloov ceev ns ntawm lub cav synchronous rotor yog tib yam li cov kev sib hloov ntawm cov teb magnetic, thiab hu ua synchronous rotational ceev. Muaj ib txoj kev sib raug zoo ntawm ns thiab qhov sib txuas ntawm kev sib hloov tam sim no (f) thiab cov sib txuam sib txig ntawm lub cav (P) ntawm lub tshuab.
N = 60f / P
Nyob rau hauv Suav teb, qhov fais fab tuag yog 50 Hz, yog li qhov khiav ntawm kev sib tshuam ntawm ib tus qauv ntawm 3-theem AC lub cev yog 3000 rpm, thiab kev khiav ntawm kev sib tshuam ua haujlwm ntawm 2-ncej ntawm AC-3 theem AC 1500 rpm, thiab lwm yam. Kev ceev ntawm lub cav asynchronous rotor yog ib txwm qis dua los yog siab dua qhov kev sib hloov ntawm nws qhov chaw magnetic, thiab lub npe ntawm tus asynchronous yog li muab los. Qhov sib txawv ntawm qhov rotor speed ntawm ib qho asynchronous lub cev thiab cov kev sib hloov magnetic teb speed (hu ua lub ris hauv qab) feem ntau tsis pub dhau 10%.
