SSE JE Electrical Engineering 29 Oct 2020 Shift 2 Papers

Question : 143 of 200

Marks: +1, -0

A three-phase induction motor with eight poles runs from a three-phase supply of 50 Hz. What is the synchronous speed of the motor?

Solution:

P = 8, f = 50 Hz
The synchronous speed of the induction motor is,

\N _{ \S }={120\f}/\P={120 ×50}/{8}=750 \rpm

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