A synchronous machine has its excitation winding on the stator and 3-phase armature winding on the rotor. When running under steady state condition, its armature field is
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Electrical Machines Questions and Answers – Starting of Synchronous Motors
This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on “Starting of Synchronous Motors”.
1. Synchronous motors are
a) not self starting
b) self starting
c) single excited
d) none of the mentioned
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2. I. Auxiliary motor
II. Dc motor
III. induction motor
The method is/are used to perform magnetic locking
a) I,II,III
b) II,III
c) II,I
d) II
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3. Auxiliary method of starting is not possib1e due to the fact that
a) it can not be started under load
b) it can be only started under load
c) it is less efficient
d) all of the mentioned
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4. Rating of the dc motor to be used in the starting of SM, should be higher than the synchronous motor.
a) True
b) False
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5. A synchronous machine with its field winding on stator and polyphase armature winding on rotor.
At steady state, which of the following is not true for its air gap field
a) stationary w.r.t. stator