PPT Slide

Section 13.5: Performance Equations

emf equation

E = fnZ(p/a)/60

torque equation

Te = fZ(p/a)Ia/(2p)

Where:

f = Flux per pole (Wb.)

n = Armature speed in RPM

Z = Number of active armature conductors

p = Number of field poles = a for lap winding

a = Number of parallel paths in the armature winding

= 2 for wave winding

Ia = Armature current in Amperes