Explanation: A polyphase induction motor can be used as a frequency converter (or changer) for changing the supply frequency f to other frequencies sf and (2-s)f at the slip ring terminals. 11. The equation for slip speed is ____________
A. (ω-ωr)/ω
B. ω-ωr
C. (ωr-ω)/ω
D. ωr
Answer:A
Explanation: A polyphase induction motor can be used as a frequency converter (or changer) for changing the supply frequency f to other frequencies sf and (2-s)f at the slip ring terminals. 11. The equation for slip speed is ____________
A. (ω-ωr)/ω B. ω-ωr C. (ωr-ω)/ω D. ωr
Explanation: The relative speed between rotor and rotating flux wave, i.e, (ω-ωr) is referred to as the slip speed in rad/sec