Patent ID: 6377153
Filing Date: 2002-04-23
Classification: H01F

Abstract:
A transformer apparatus comprising:a first core having a first primary winding wound around said first core; a second core having a substantially same structure as that of said first core, and having a second primary winding wound around said second core, said second primary winding being connected in parallel to said first primary winding; a first conductor housing; a second conductor housing; and a third core having a secondary winding around said third core, said third core being entirely and electrostatically shielded by said first conductor housing, wherein said third core is arranged so as to be sandwiched between said first and second cores respectively via first and second electrostatically shielding disks electrically connected to said second conductor housing, and wherein said first, second and third cores are electrically connected by said second conductor housing operating as one-turn winding, and are electrostatically and magnetically shielded from the outside of said transformer apparatus by said second conductor housing.