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Speed of a D.C. Motor

7.8. Speed of a D.C. Motor

We know that the voltage equation of a motor is given by

V=Eb+IaRa

Eb = V -IaRa34

Ia1 = armature current in the first case, and

ɸ1 = flux in the first case.

N2, Ia2 and ɸ2 = corresponding quantities in the second case. 3536