Electrical Machines
In a synchronous motor hunting can be reduced to minimum possible by

  any of above methods.
  providing damper winding in the rotor pole faces.
  designing the motor for adequate synchronizing power.
  using a flywheel.

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Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as

  they have maximum efficiency and maximum starting torque.
  they are capable of operation under range of leading and lagging pf.
  they have very good speed regulation.
  these are cheaper in cost, simple and rugged in construction.

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