In a 3-phase induction motor, the rotor induced EMF per phase (Er) is equal to:

(Where Eo is rotor induced EMF at standstill and s is slip)

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MPPGCL JE Electrical 19 March 2019 Shift 2 Official Paper
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  1. sEo
  2. Eo
  3. \(\frac{E_{o}}{s}\)
  4. sEr

Answer (Detailed Solution Below)

Option 1 : sEo
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Detailed Solution

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Concept

The EMF induced in the rotor of an induction motor is given by:

\(E_r=sE_o\)

where, Er = Rotor induced EMF

Eo = Standstill EMF

s = Slip

The slip 's' is given by:

\(s={N_s-N_r\over N_s}\)

Ns = Synchronous speed

Nr = Rotor speed

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