A 4-pole, 3-phase slip ring induction motor is used as a frequency cha – McqOptions

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1.	A 4-pole, 3-phase slip ring induction motor is used as a frequency changer. Its stator is excited from 3-phase, 50 Hz supply. A load requiring 3-phase, 20 Hz supply is connected to the star-connected rotor through three slip-rings of SRIM.$
A.
B.	900 rpm
C.	600 rpm
Answer» B. 900 rpm

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