Patent ID: 6617949
Filing Date: 2003-09-09
Classification: H01F,H03H

Abstract:
A choke coil including a coil pair having a winding ratio of 1:1, comprising:first and second coils forming said coil pair, respective of said first and second coils being divided into first and second segments wound on a single spool disposing intermediate insulations layers between respectively adjacent coil segments, said first and second coil segments being stackingly wound in sequential order of said first coil segment of said first coil, said first coil segment of said second coil, said second coil segment of said first coil and said second coil segment of said second coil from inside to outside, said first coil segment of said first coil and said second coil segment of said second coil being wound in a first winding number and said second coil segment of said first coil and said first coil segment of said second coil being wound in a second winding number, said second winding number being greater than said first winding number for reducing difference of winding resistance between said first and second coils less than or equal to 4%.