What is relation between frequency of stator and rotor current of a dfim?
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The synchronous speed of the rotor in RPM N = 120f/P where f is the frequency of the stator current and P is the number of poles.
The operating speed No = N - Ns where Ns is the slip speed.
The frequency of the rotor current fr = Ns x P/120, so fr = 0 if the slip is zero.
If the operating speed is zero, Ns = N and the frequency of the rotor current is the same as the frequency of the stator current.
down vote
accepted
The synchronous speed of the rotor in RPM N = 120f/P where f is the frequency of the stator current and P is the number of poles.
The operating speed No = N - Ns where Ns is the slip speed.
The frequency of the rotor current fr = Ns x P/120, so fr = 0 if the slip is zero.
If the operating speed is zero, Ns = N and the frequency of the rotor current is the same as the frequency of the stator current.
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