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why 400Hz is used for aircraft systems ?
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Answer Posted / ravi
Higher than usual frequencies, such as 400 Hz, offer
several advantages over 60 Hz – notably in allowing
smaller, lighter power supplies to be used for military
hardware, commercial aircraft operations and computer
applications. As aircraft space is at a premium and weight
is critical to aircraft engine thrust and fuel burn (and
thus the aircraft range and engine horsepower per pound),
115 volts at 400 Hz offers a distinct advantage and is much
better than the usual 60 Hz used in utility power generation
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