What are the two ways rotors can be assembled in an AC generator?

In an AC generator, precision in rotor design is crucial for effective operation, and the salient and round configurations represent two distinct methods of assembly.

Salient rotors possess projecting poles that enhance the magnetic field, commonly used in low-speed applications, such as hydroelectric generators. This design allows for a strong magnetic pull and greater efficiency in converting mechanical energy into electrical energy, making it suitable for generators that operate at lower revolutions per minute.

Round rotors, on the other hand, feature a more streamlined design and are typically found in high-speed generators, such as those used in gas turbine applications. The round shape facilitates higher rotational speeds and smoother operation due to the simplified aerodynamic profile, hence reducing drag.

Thus, these two designs—salient and round—highlight the engineering considerations in rotor assembly and their appropriateness for various operational contexts within AC generators.