improper size fuses
worn out bearings or low voltage or overload
open circuit in the winding
short circuit in the winding
D.C. shunt motor
D.C. series motor
single phase induction motor
synchronous motor
single phase series motor
resistance split phase motor
shaded pole motor
hysteresis motor
capacitor motor
reluctance motor
universal motor
D.C. braking
plugging
phase reversal
mechanical device