Formula for cancellation of reactance voltage on an average basis using interpoles ________(a) 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc)(b) [Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc)(c) 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (lc/tc)(d) Cannot be determinedThe question was posed to me in an online quiz.The above asked question is from Commutation Process -1 topic in section Commutation Process & Excitation Methods of DC Machines

Formula for cancellation of reactance voltage on an average basis usin

1.	Formula for cancellation of reactance voltage on an average basis using interpoles ________(a) 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc)(b) [Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc)(c) 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (lc/tc)(d) Cannot be determinedThe question was posed to me in an online quiz.The above asked question is from Commutation Process -1 topic in section Commutation Process & Excitation Methods of DC Machines
Answer» CORRECT option is (a) 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc) The best I can EXPLAIN: 2[Bi(av)liva] Nc = Lc (dic/dt) = Lc (2lc/tc). With Bi determined by above equation, the ampere-turns NEEDED to CANCEL the armature reaction ampere-turns and then to create the necessary flux density are given by, ATi = ATa (peak)+(Bi/µ0 )lgi

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