tell me whole construction and working of Ac motor and Generator
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Answer:
AC Generator Components Summary
The field in an AC generator consists of coils of conductors within the
generator that receive a voltage from a source (called excitation) and produce
a magnetic flux.
The armature is the part of an AC generator in which output voltage is
produced.
The prime mover is the component that is used to drive the AC generator.
The rotor of an AC generator is the part that is driven by the prime mover
and that rotates.
The stator of an AC generator is the part that is stationary.
Slip rings are electrical connections that are used to transfer power to and
from the rotor of an AC generator.
The two main types of AC motors are induction motors and synchronous motors. The induction motor (or asynchronous motor) always relies on a small difference in speed between the stator rotating magnetic field and the rotor shaft speed called slip to induce rotor current in the rotor AC winding. As a result, the induction motor cannot produce torque near synchronous speed where induction (or slip) is irrelevant or ceases to exist. In contrast, the synchronous motor does not rely on slip-induction for operation and uses either permanent magnets, salient poles (having projecting magnetic poles), or an independently excited rotor winding. The synchronous motor produces its rated torque at exactly synchronous speed. The brushless wound-rotor doubly fed synchronous motor system has an independently excited rotor winding that does not rely on the principles of slip-induction of current. The brushless wound-rotor doubly fed motor is a synchronous motor that can function exactly at the supply frequency or sub to super multiple of the supply frequency.
Other types of motors include eddy current motors, and AC and DC mechanically commutated machines in which speed is dependent on voltage and winding connection.