Question
Download Solution PDFIn a three-phase induction motor which component represents mechanical load in the equivalent circuit?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFEquivalent circuit of a 3ϕ induction motor
The total resistance at the rotor is represented as \(\rm \frac{R_2}{s}\) where s is the slip.
Now, if we create an equivalent transformer circuit for an induction motor, the secondary resistance will be R2. Thus, the load resistance will be \(\rm \frac{R_2(1-s)}{s}\).
Induction motor modelled as a transformer:
When all the rotor parameters are shifted to the stator side induction motor circuit is given by:
\(\rm \frac{R_2(1-s)}{s}\) is the resistance that represents mechanical load in the equivalent circuit.
Last updated on Jun 7, 2025
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