What is the purpose of an alternator in an aircraft?

The role of an alternator in an aircraft is primarily to charge the battery and supply electrical power to the aircraft's systems during flight. This function is crucial because it ensures that all electrical components, such as navigation, communication, and lighting systems, receive the necessary power to operate effectively while the aircraft is in motion.

When the engine is running, the alternator generates electricity by converting mechanical energy into electrical energy, allowing it to not only maintain battery charge but also consistently supply power to the aircraft's auxiliary systems. A well-functioning alternator is vital for the reliability and safety of the aircraft's electrical system.

While emergency power supply and backup generators play important roles in overall aircraft electrical management, these functions are not the primary duty of the alternator itself. Similarly, regulating fuel pressure is unrelated to the electrical systems managed by the alternator.