railway DFCCIL Executive 2025 Mock Test Electrical Machines Alternator and Synchronous Motors Salient Pole Alternator Operation
In a relation to the synchronous machines, which of the following statement is false
1
In a salient pole machine, the direct axis synchronous reactance is greater than the quadrature axis synchronous reactance
2
Damper bars help the synchronous motor self-start
3
Short circuit ratio is the ratio of the field current required to produce the rated voltage on open circuit to the rated armature current.
4
The V curve of a synchronous motor represents the variation in the armature current with field excitation, at a given output power