Ringing choke for use in electronic fluorescent lamps has a symmetrical double E core, geometrically identical coil windows and rectangular parallel-piped center and outer branches

摘要

A ringing choke has two geometrically identical coil windows, a rectangular parallel-piped center branch (17) and two rectangular parallel-piped outer branches (18,19). A double E core is laid out in such a way that a cross-sectional surface of the center branch is greater than 90 mm2. A sectional envisaged as a lengthwise section would separate the double E core into two simple E cores. Independent claims are also included for a coil unit for use in swinging chokes and for a method for producing a swinging choke.