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 Generators: A primary source of electrical energy.
•Synchronous Motors: Used as motors as well as power factor compensators (synchronous condensers).
•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.
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