1/ The selection of 400Hz for the aircraft is the result of extensive testing, where the generation and utilization of power equipment can be lightweight and compact within this frequency range, with mature performance. 2/ Generally speaking, if the system frequency is high, the amount of copper and steel used in generators and transformers is reduced, leading to lighter weight and lower costs. 3/ However, the disadvantages include increased inductive reactance of electrical equipment and lines, reduced capacitive reactance, increased losses, and reduced transmission efficiency. Compared to the aircraft's weight, these drawbacks are secondary. 4/ There is a famous saying in the aviation industry: "We should strive to reduce every gram." Therefore, to decrease volume and weight, aviation generators require high frequency. Calculations show that under 115V and 400Hz conditions, the power-to-weight ratio of the equipment is high, explaining its continued use. 36V aviation power supply, 400Hz frequency conversion power supply, 115/200V power supply, 27V DC power supply, 400Hz power supply, aviation power supply
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