A 4 pole dynamo with wave wound armature has 51 slots containing 20 conductors in each slots.The induced emf is 357 volt and the speed is 8500 rpm . calculate the flux per pole. (GATE-EE-1996)

 A 4 pole dynamo with wave wound armature has 51 slots containing 20 conductors in each slots.The induced emf is 357 volt and the speed is 8500 rpm . calculate the flux per pole.  (GATE-EE-1996)



Explanatory answer :

 Given:


 P=4 , Wave(A=2) , slots S= 51 , cond/slot = 20 , E= 357 volt
 N = 8500 rpm , Ø = ?

 Sol:


Total conductors = slots * cond/slot = 51 *20 = 1020 conductors

Ø = E * 60 * A / ZNP

Ø = 357 * 60 * 2 / 1020 * 8500 * 4

Ans: Ø = 1.23 mwb