tə səstˈeɪn ɹoʊtˈeɪʃən, ðə stˈeɪɾɚ fˈiːld mˈʌst ɹoʊtˈeɪt ɪn ɐdvˈæns ʌvðə ɹˈoʊɾɚ pˈoʊlz, ðˈʌs kˈɑːnstəntli "pˈʊlɪŋ" ðə ɹˈoʊɾɚɹ ɐlˈɔŋ.
To sustain rotation, the stator field must rotate in advance of the rotor poles, thus constantly "pulling" the rotor along.