What is the primary type of electrical power used in large jet aircrafts?

Large jet aircraft primarily use Alternating Current (AC) because it is efficient for powering various aircraft systems and can easily be transformed to different voltages for different applications. AC power is capable of transmitting electricity over long distances with reduced losses compared to Direct Current (DC), making it an ideal choice for the extensive electrical needs of large aircraft, including avionics, lighting, and climate control systems.

Additionally, AC systems allow for the use of smaller and lighter components such as transformers and generators, which contribute to overall fuel efficiency and weight savings in the design of the aircraft. The use of three-phase alternating current can also provide a more balanced load and reliable power distribution, enhancing the overall performance and safety of electrical systems onboard.

While DC is used in specific areas of aircraft systems, such as battery systems and some backup applications, it is primarily AC that provides the standard electrical power for flight operations in large jet aircraft.