Question

Derive the emf equation of generator and find the emf of the DC machine which has 8 poles lap connected armature with 960 conductors and flux per pole is 40 mWb. It is driven at 400 rpm. Also calculate the emf if the lap connected armature is replaced by wave connected and speed at which it should be driven to generate 400V.​

Answer 1

Answer:

maths question. -----------------

Answer 2

Explanation:

Using again equation (6.5) we have

E=\frac{\Phi \, ZNP}{60\, A}E=

60A

ΦZNP

Here \Phi =40Φ=40 mWb ,Z=960, N=400 rpm, P=8 and since it is lap connected A=P=8.

Substituting these values we have

E=\frac{40\times 10^{-3}\times 960\times 400\times 8}{60\times 8}E=

60×8

40×10

−3

×960×400×8

= 256 volts