In 3phase induction motor why does rotar rotate?
Induction motors comprise a stator assembly and a rotor. The stator is an iron frame surrounding a number of field windings. In its simplest form, the rotor is of squirrel cage construction, comprising a number of parallel copper bars arranged in a circle attached to shorting rings at each end. When an electric current is applied to the field windings, a rotating magnetic field is induced. The speed of the rotation is directly related to the frequency of the AC supply. This magnetic field in turn causes an EMF to be produced in the rotor bars and this EMF results in a magnetic force in them of opposite polarity to the stator. As opposite poles attract, the rotor turns to follow the rotating field of the stator. This is the explanation in its simplest form. The rotational speed of the motor is expressed as :- RPM K x S divided by P. Where K is the constant 120, S is the supply frequency in Hertz and P is the number of stator poles. Why was this posted to Boats Boating?
Probably helps to create more power and conductivity. But that's just my guess.
