power systems loss

EDDY CURRENT LOSSES IN TRANSFORMER WINDINGS AND CIRCUIT WIRING By: Lloyd H.Dixon Jr. As  switching  power  supply  operating  frequencies  increase,  eddy  current  losses  and parasitic inductances  can greatly  impair  circuit performance.  These  high  frequency  effects  are caused  by  the  magnetic  field  resulting  from current  flow  in transformer  windings  and circuit wiring.This  paper is intended  to provide  insight  into these  phenomena  so  that  improved  high  frequency. performance  can  be  achieved.  Among other  things,  it  explains  (I)  why  eddy  current losses increase so dramatically  with  more  winding  layers,  (2)  why  parallelling  thin  strips  doesn't  work,  (3)  how  passive conductors  (Faraday shields  and  C. T .windings)  have  high  losses, and  (4)  why  increasing  conductor  surface  area will  actually  worsen  losses and  parasitic  inductance  if  the  configuration  is  not  correct. READ MORE >>>