An alternator is a device that generates electrical energy by converting mechanical energy into electrical energy. It is commonly used in vehicles to charge the battery and power the electrical systems while the engine is running. Alternators have several specifications that determine their performance, including the voltage output, amperage output, and rotation speed.
The voltage output of an alternator is typically around 14 volts, which is sufficient to charge a 12-volt battery. The amperage output can vary depending on the size and capacity of the alternator, and can range from around 50 amps to over 200 amps. The rotation speed is typically around 2,000 to 10,000 RPM, depending on the application and design of the alternator.