Comparison of Aircraft Electrical Systems to Supply 20 KVA Variable Frequency and 5 KVA Constant Frequency

This paper discusses the suitability of four different generating systems for a hypothetical aircraft requiring 25 KVA of ac electric power, 5 KVA of which must be at constant frequency. The systems are examined in terms of weight and relative reliability using data representative of similar components on existing applications. The lightest, most reliable, system of those compared supplies all of its power at constant frequency.