USCG USCG Electrical
Set 4 • Question #110 of 142
Launch Interactive Practice Room A synchronous motor maintains synchronism with the rotating field because __________.
A
field strength varies directly with rotor slip
B
DC current applied to the rotor coils causes the rotor magnets to lock in with the rotating flux of the stator
✓ Correct Answer
C
the stator poles are dragged around due to the flux created by the excitation current
D
the stator flux rotates in the opposite direction
USCG NMC Regulatory Explanation
In USCG Marine Electrical Systems (IEEE 45 and 46 CFR), regarding 'A synchronous motor maintains synchronism with the rotating field because', the compliant technical standard is: 'DC current applied to the rotor coils causes the rotor magnets to lock in with the rotating flux of the stator'.
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