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Description of  Armature Reaction and Commutation Engineering Book: Electrical Engineering Book

The armature reaction simply shows the effect of armature field on the main field. In other words, the armature reaction represents the impact of the armature flux on the main field flux. The armature field is produced by the armature conductors when current flows through them. And the main field is produced by the magnetic poles. Armature Reaction Demagnetising and Cross- magnetising Conductors Demagnetising AT per Pole Cross-magnetising AT per pole Compensating Windings No. of Compensating Windings Commutation Value of Reactance Voltage Methods of Improving Commutation Resistance Commutation E.M.F. Commutation Interpoles or Compoles Equalising Connections Parallel Operation of Shunt Generators Paralleling D.C. Generator Load Sharing Procedure for Paralleling D.C. Generators Compound Generators in Parallel Series Generators in Parallel