Contactless Excitation System for Synchronous Generators.

Abstract

The paper proposes a new application of contact-less  power  supply  technology  to  transfer  electric  power  torotating  rotors  of  synchronous  electric  generators  (excitationsystem,  usually  placed  in  rotor).  The  design  and  operationsimulation  of  a  magnetic  collector,  the  main  part  of  a  contact-less  power  supply  of  a  synchronous  machine  excitation  systemis   presented.   This   new   excitation   system,   will   keep   theadvantages  of  rapidity  offered  by  static  excitation  combinedwith  slip  ring  collector  and  the  easy  maintenance  offered  bybrush-less    excitation    system,    avoiding    the    maintenanceproblems  of  the  first  system  and  the  high  time  constant  ofexciter  coil  of  the  later.  An  application  for  a  synchronousgenerator of 500 kW is also presented.