MOTOR CONSTRUCTION


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MOTOR CONSTRUCTION
MOTOR CONSTRUCTION
Characteristics of Aircraft Electric Motors The power-to-weight ratio of aircraft electric motors must be high; that is, a small motor must deliver a maximum amount of power for a minimum of weight. A commercial motor may weigh as much as 100 lb/hp [60.8 kg/kW], but for aircraft purposes there are motors that weigh less than 5 lb/hp [3 kg/kW]. Reduced weight is attained by operating the motors at high speeds and high frequencies and with relatively high currents. This necessitates the use of heat-resistant insulation and enamels in the armature and field windings and perhaps ram air or cooling fans to help dissipate the motor's heat. Some fractional-horsepower motors used i…
Citation
Thomas K. Eismin: Aircraft Electricity and Electronics, Sixth Edition. MOTOR CONSTRUCTION, Chapter (McGraw-Hill Professional, 2014), AccessEngineering Export