High frequency electronic circuit for load ballasting

摘要

A high frequency electronic ballast (128) having a transformer (104) in which the transformer (104) has a primary winding (106) which is coupled to a secondary winding (108) via a primary flux path (1) from which flux can be diverted by a secondary flux path (2) including an air gap (114) which can be adjustable. Use of the transformer (104) permits load operation from a rectified alternating current power source which can be compensated by a high frequency power supply (192) to present a favorable power factor to the alternating current supply.