Examveda
Examveda

A synchronous motor can be made self starting by providing

A. Damper winding on rotor poles

B. Damper winding on stator

C. Damper winding on stator as well as rotor poles

D. None of the above

Answer: Option D


This Question Belongs to Electrical Engineering >> Synchronous Motors

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Comments ( 3 )

  1. Waqar Qureshi
    Waqar Qureshi :
    5 months ago

    Detailed Solution
    Option: A
    The synchronous motor is made self-starting by providing a special winding on the rotor poles, known as damper winding or squirrel cage winding. AC supply given to the stator produces a rotating magnetic field which causes the rotor to rotate. Therefore, in the beginning synchronous motor provided with damper winding starts as a squirrel cage induction motor. The exciter moves along the rotor. When the motor attains about 95%of synchronous speed, the rotor winding is connected to exciter terminals and the rotor is magnetically locked by the rotating field of the stator and the motor runs as a synchronous motor.

  2. Jagadish Pani
    Jagadish Pani :
    5 years ago

    Damper winding in rotor perifery just as sq induction motor for initial start

  3. Rajeeb Lochan
    Rajeeb Lochan :
    5 years ago

    Ans- c

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