Fundamental Principles of A.C. Machines

Fundamental Principles of A.C. Machines:

AC rotating machines can be classified mainly in two categories Synchronous Machines and Asynchronous Machines. 

They are defined as-

•Synchronous Machines:

•Synchronous Generators: A primary source of electrical energy.

•Synchronous Motors: Used as motors as well as power factor compensators (synchronous condensers).

•Asynchronous (Induction) Machines:

•Induction Motors: Most widely used electrical motors in both domestic and industrial applications.

•Induction Generators: This generator runs at asynchronous speed and variable frequency voltage generated. Due to lack of a separate field excitation, these machines are rarely used as generators.