7. The flux density in the 0.2in. air gap of an electric motor is 42,000 maxwells...

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7. The flux density in the 0.2in. air gap of an electric motor is 42,000 maxwells per sq in. If the mmf required to produce this flux density is 82 percent of the total mmf developed by the exciting coll (18 percent is needed for the iron portions of the magnetic circuit), calculate the number of turns in the windings, assuming a current of 2.2 amp. 7. The flux density in the 0.2in. air gap of an electric motor is 42,000 maxwells per sq in. If the mmf required to produce this flux density is 82 percent of the total mmf developed by the exciting coll (18 percent is needed for the iron portions of the magnetic circuit), calculate the number of turns in the windings, assuming a current of 2.2 amp.

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Airgap flux density Bag 42000 Mxinch 2 42000 10 8 Wb 000064516 m 2 0651 T Airgap length l a... View the full answer