Question
Download Solution PDFIn a DC machine, let ϕ be the flux per pole, ωm be the armature speed in rad / s, Nc be the number of coil turns in the armature and P be the number of poles. What will be the average coil EMF in that machine?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
E.M.F. generated by a generator is
Where,
ϕ = flux
Z = number of conductors
N = speed in RPM
P = number of poles
A = number of parallel paths
Application:
As the number of parallel paths is not given take A = 1
ωm = speed in rad/sec
ωm = 2πN/60
N = 30ωm / π ......(2)
Z = 2 × Nc .......(3)
Nc = number of coil turns
From equations (1), (2) and (3)
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