what is the difference between A.C. generator and D.C. generator as well as A.C motor A.C motor????
Case1:-
The only difference between a d.c. generator and an a.c. generator is in the way the two ends of the generator coil are linked to the outer circuit. In d.c. generator we connect the two ends of the coil to the commutator consisting of two half rings of copper. On the other hand, in an a.c. generator, we connect the two ends of the coil to two full rings of copper called slip rings. There is no commutator in an a.c. generator.
Case2:-
While both A.C. and D.C. motors serve the same function of converting electrical energy into mechanical energy, they are powered, constructed and controlled differently. The most basic difference is the power source. A.C. motors are powered from alternating current (A.C.) while D.C. motors are powered from direct current (D.C.), such as batteries, D.C. power supplies or an AC-to-DC power converter. D.C wound field motors are constructed with brushes and a commutator, which add to the maintenance, limit the speed and usually reduce the life expectancy of brushed D.C. motors. A.C. induction motors do not use brushes; they are very rugged and have long life expectancies. The final basic difference is speed control. The speed of a D.C. motor is controlled by varying the armature winding’s current while the speed of an A.C. motor is controlled by varying the frequency, which is commonly done with an adjustable frequency drive control.