can u plz tell me abt spiral core in a transformer ???

 

Enjoy.

Edit: In fact it does not give much (any) information about sprial cores, which by looking through current literature implies that this is a relatively new field. If you can get access, these two papers give a fair treatment of the subject:

http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/20/19613/00908886.pdf?arnumber=908886

http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/2194/27363/01216841.pdf?arnumber=1216841

Dave