GATE EE 2022 Set 1 — Question 35
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Electrical Machines → Three-Phase Induction Machines → Slip & Equivalent Circuit
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Question
The frequencies of the stator and rotor currents flowing in a three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in rpm, is _________________. (round off to nearest integer)
Correct answer
580 to 590
Solution
Given:
Stator frequency, Hz
Rotor frequency, Hz
Number of poles, The slip is given by:
The synchronous speed is:
rpmThe actual motor speed is:
rpm.
Stator frequency, Hz
Rotor frequency, Hz
Number of poles, The slip is given by:
The synchronous speed is:
rpmThe actual motor speed is:
rpm.
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