Patent ID: 7474193
Filing Date: 2009-01-06
Classification: H01F,H03H

Abstract:
1. A toroidal line filter comprising: an annular core; and a plurality of coils wound around the annular core, wherein the plurality of coils are configured in such a way that at least one of the plurality of coils is wound over a predetermined partial area of the annular core and at least another one of the plurality of coils is wound over the remaining area of the annular core; wherein a first coil of the plurality of coils is wound upwardly from the lowermost end to substantially the central part of the annular core, a second coil of the plurality of coils is wound downwardly from the central part to the lowermost end of the annular core, a third coil of the plurality of coils is wound upwardly from the lowermost end to the uppermost end of the annular core, a fourth coil of the plurality of coils is wound downwardly from the uppermost end to the central part of the annular core, and a fifth coil of the plurality of coils is wound upwardly from the central part to the uppermost end of the annular core.