if excitation of synchronous generator fails, operate as induction motor
Starting method of 1 phase I.M.
Split phase starting
Shaded pole starting
types of 1 phase I.M.
Resistor split phase motor
capacitor spit phase motor
Resistor split phase motors have poor starting torque
capacitor split phase motor, capacitor connect series with auxiliary winding make angle 90˚ result in optimum starting torque.