Switchable self coupling auxiliary current unit for home digital equipment charges a holding capacitor from auxiliary transformer windings through a controller

摘要

A switchable self-coupling auxiliary current unit for a mains apparatus for charging a holding capacitor comprises a transformer (T1) with primary (10) and secondary sides, an auxiliary winding (Na) and an additional high-voltage auxiliary winding (Nb) for capacitor charging and control (102) and energy transfer (104) circuits.