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- Q536 - Electrical, Electronic, & Control Engineering
582. What would be the actual rotor speed for a 4-pole three-phase squirrel-cage induction motor operating at 60 Hz if the rotor slip is 3%?
The rotor speed is calculated by subtracting the slip from the synchronous speed. Synchronous speed is determined by the formula 120f/P, where f is frequency and P is the number of poles. With a 4-pole motor at 60 Hz, the synchronous speed is 1800 RPM. A 3% slip results in a rotor speed of 1746 RPM.
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