engineering recuitment DVC Junior Engineer Mock Test 2024 Electrical Machines Alternator and Synchronous Motors Synchronous Motor Power
Consider the following statements about damper winding used to start a synchronous motor and choose the suitable combination of correct choices.
a) When a motor is overloaded it does not stop.
b) Synchronous motor made self-starting by providing damper winding.
c) Damper winding consists of short-circuited copper bars embedded in the face of the field poles.
d) Since damper winding resistance is high so it takes a small current from the supply mains.
1
Only a, b and c are true.
2
All a, b, c, d are true.
3
Both b and c are true.
4
Both b and d are true.