Synchronous IM

In a synchronous induction motor, the stator and rotor rotate at the same speed.

• True

• False

The rotor in a synchronous induction motor is made of:

• a) Copper

• b) Aluminum

• c) Iron

• d) None of the above

The power factor of a synchronous induction motor is:

• a) Always lagging

• b) Always leading

• c) Unity

• d) None of the above

The starting torque of a synchronous induction motor is:

• a) Zero

• b) High

• c) Low

• d) None of the above

A synchronous induction motor is not self-starting because:

• a) It does not have a starting winding

• b) It has a low starting torque c) It has a high starting current

• d) None of the above Answer:

• a) It does not have a starting winding

The stator winding in a synchronous induction motor is:

• a) A 3-phase winding

• b) A single-phase winding

• c) A 2-phase winding

• d) None of the above