Why is it that 400HZ power is generally used on planes, which is closely related to their own usage needs?
As a variable frequency power supply, a higher system frequency results in less copper and steel material used in generators and transformers, leading to lighter weight and lower costs. However, this is offset by increased inductive reactance of electrical equipment and reduced capacitive reactance, causing increased losses and reduced transmission efficiency. Conversely, a lower frequency increases material usage, weight, and cost for electrical equipment. Therefore, 50 and 60 Hz power supplies are suitable values.
The aviation industry has a famous saying: "Strive to reduce every gram!" Therefore, to reduce volume and weight, high-frequency generators are required for aviation applications. Since the transmission lines on aircraft are not excessively long, losses are no longer the primary contradiction. Thus, a 400Hz power source becomes an excellent choice. In fact, in the *field, there are even higher-frequency variable frequency power sources in use.
