Good day All.
KIndly help me to find that why slip (s) is subtracted from synchronous speed (Ns) to get value for actual speed of Induction motor in "Separate-Winding Motor" case( a method for providing multi-speed control)??
i.e. Speed = 120*Frequency/No. of poles - Slip
Ref : STEP series by Siemens, Basics of Control Components, Page # 56