What will be the running speed of a 6 -pole synchronous motor connected to a 3 -phase, 60-Hz supply, and having rated load?
What will be the running speed of a 6 -pole synchronous motor connected to a 3 -phase, 60-Hz supply, and having rated load?
Right Answer is:
1200 rpm
SOLUTION
Speed of synchronous motor is given as
Ns = 120f/P
Where
f = frequency = 60 Hz
P = Numbers of poles =6
Ns = (120 × 60)/6
Ns = 1200 RPM