What is an advantage of alternators over generators?

Delivering higher current at a lower RPM is a significant advantage of alternators over generators. This characteristic stems from the way alternators are designed. Unlike traditional generators, which operate using a commutator to convert mechanical energy into direct current (DC), alternators produce alternating current (AC) and have a more efficient design that allows them to function effectively at lower speeds.

At lower RPMs, alternators can still provide substantial power output due to their ability to generate AC, which can then be easily converted to DC as needed. This efficiency at low speeds is particularly beneficial in modern vehicles and applications where engine speeds may vary widely, as it ensures reliable power generation without the need for high RPMs, leading to overall improved fuel efficiency and engine performance. This makes alternators a preferred choice in many applications, especially in automotive systems where consistent performance is essential.

In contrast, the other options present characteristics that either do not align with typical advantages of alternators or are negative aspects that would not represent a real advantage. For instance, generating more heat and requiring more maintenance are generally drawbacks associated with generators rather than advantages of alternators. Being lighter in weight is also a consideration, but the ability to deliver higher current at lower RPM is a more critical advantage