Tawm induction motors thiab teb induction motors nyob rau hauv txoj cai ntawm kev ua hauj lwm yog tsis tseem ceeb sib txawv. Tsuas yog cov neeg ua haujlwm tau zoo dua. Tab sis ob qho tib si hauv kev ua yeeb yam hauv tshuab electromagnetic muaj ntau qhov kev ua yeeb yam sib txawv, feem ntau ntawm cov hauv qab no:
(1) Qeeb qis qis qis qis qis ntawm tus qauv stator peb theem theem yog symmetrical. Li no yog hais tias qhov siv peb theem siab voltage yog symmetrical. Peb theem tam sim no yog symmetrical. Tab sis txoj kab theem peb theem ntawm cov kab kev tawm sab nraud yog qhov kev txiav txim siab hauv qhov chaw. Lub kauj ntawm ntug yog piv rau cov kauj nyob hauv nruab nrab. Qhov nqi inductance no txawv heev. Uas yog hais: theem reactance yog tsis sib npaug. Yog li ntawd, txawm tias peb theem siab yog qhov sib thooj. Peb-theem winding tam sim no tseem yog asymmetrical.
(2) Qog khoom qis qis qis qis, lub rotor ntawm cov kis cua sib txawv, tsis muaj lub taub hau tsis tw, nruam. Yog tsis muaj pib thiab kawg. Tab sis txoj kab kev tawm ntawm sab hauv nruab nrab ntawm cov thawj thiab theem ob yam huab cua tshwm sim thaum pib thiab thaum xaus. Thaum theem ob nkag lossis tawm hauv cov pa nruab nrab. Yuav tsum nyob rau hauv lub thib ob conductor inductive ntxiv tam sim no. Qhov no yog qhov hu ua "marginal effect". Vim muaj kev cuam tshuam ntawm cov nyhuv ntug, cov kev tawm ntawm sab linear thiab cov kauj khawm induction yog cov sib txawv hauv kev khiav hauj lwm yam ntxwv.
(3) vim hais tias txoj kev tawm ncaj qha rau sab qaum tsev, theem nrab nyob rau hauv cov kev taw qhia ntawm txoj kab ncaj nraim mus ntxiv rau qhov ntev, thiab lub cev hluav taws xob feem ntau yog tsis sib luag, yog li ntawm txhua tus thawj thiab theem nrab huab cua ntawm qhov ntev. xws li. Nws qhov hluav taws xob zoo tshaj yog qhov qis tshaj qhov qis ua haujlwm rau sab nraud.
