Synchronous motors and induction motors as is a common AC motors . Features are: steady-state operation , there is a constant relationship n = ns = 60f / p between the rotor speed and grid frequency , ns become synchronous speed . If the frequency of the grid constant, synchronous motor when the speed is constant for steady state regardless of the size of the load . Synchronous motors are divided into synchronous generators and motors. Modern power plants to AC synchronous motor based machine .
Works
Establish the main magnetic field : the field winding through a DC excitation current , alternating polarity magnetic field established , namely to establish the main magnetic field .
Carrying conductors : three phase windings of the armature windings act as power , or become EMF induced current carrier.
Cutting sports : Drag the prime mover rotor rotation ( mechanical energy input to the motor ) , alternating polarity magnetic field excitation rotate with the shaft and the stator windings of each phase sequentially cut ( the equivalent of cutting conductors reverse winding excitation field ) .
Produce alternating potential : Due to the relatively cutting motion of the armature winding and the main magnetic field between the armature winding direction will be induced by cyclical changes in the size and symmetry of three-phase alternating potential . By Lead can provide AC power.
Pay degeneration and symmetry : As the rotating magnetic field polarity and white, making the pole alternating EMF 's ; due to the symmetry of the armature winding , ensuring the three-phase induction electric potential symmetry .