Which voltage is neutralized in voltage commutation process?(a) Armature(b) Reactance(c) Field(d) Cannot be determinedThis question was posed to me in an interview for job.This intriguing question comes from Commutation Process -1 topic in chapter Commutation Process & Excitation Methods of DC Machines

Which voltage is neutralized in voltage commutation process?(a) Armatu

1.	Which voltage is neutralized in voltage commutation process?(a) Armature(b) Reactance(c) Field(d) Cannot be determinedThis question was posed to me in an interview for job.This intriguing question comes from Commutation Process -1 topic in chapter Commutation Process & Excitation Methods of DC Machines
Answer» RIGHT option is (b) Reactance Explanation: To SPEED up the commutation PROCESS, the reactance voltage must be neutralized by injecting a suitable polarity dynamical (speed) voltage into the commutating coil. In order that this injection is RESTRICTED to commutating coils, narrow interpoles are provided in the interpolar region.

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