Electrical Machine -1 Unit-1
Equation of DC generator
Que. Derive an emf Equation of DC generator.
Ans. Electromagnetic induction in DC generator the emf is
flux cut by one conductor in one revolution
Number of revolution made per second
Time of one revolution of armature
The average emf induced in one conductor will be
Putting the value of dϕ & dt
Number of conductor in each circuit
The total generated emf between the terminals
E = Average emf induced in one conductor ✖️ number of conductor in each circuit
Where, Ï• = flux per pole in weber
Z = total number of armature conductors
P = number of poles
A = number of parallel path in the armature
N = rotational speed of armature in rpm
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