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What is the formula for mmf for air gap?(a) mmf for air gap = 800000 * air gap flux density * air gap factor * length of air gap(b) mmf for air gap = 800000 / air gap flux density * air gap factor * length of air gap(c) mmf for air gap = 800000 * air gap flux density / air gap factor * length of air gap(d) mmf for air gap = 800000 * air gap flux density * air gap factor / length of air gapThis question was addressed to me during an internship interview.This interesting question is from No Load Current in section Three Phase Induction Motor of Design of Electrical Machines

Answer»

Correct choice is (a) MMF for air gap = 800000 * air gap flux density * air gap factor * length of air gap

The best explanation: For CALCULATING the mmf for air gap, the air gap flux density is FIRST calculated. NEXT the air gap factor is calculated along with the length of air gap.



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