What does the electrical system's voltage regulator do?

The electrical system's voltage regulator primarily functions to control the output of the alternator. In an aircraft's electrical system, the alternator generates electrical power, and the voltage regulator ensures that this output remains within a specified voltage range. This is crucial because excessive voltage can damage electrical components, while insufficient voltage can result in inadequate power supply for systems that rely on electricity.

By maintaining the voltage at an optimal level, the voltage regulator helps ensure the efficient operation of the aircraft's electrical system, including navigation and communication equipment, lights, and other critical instruments. This regulation is essential for the safety and reliability of the aircraft's operations, particularly during flight when power demands can vary significantly.