STABILIZER OF A C VOLTAGE Russian patent published in 2003 - IPC

FIELD: electrical engineering, power supply systems employing stabilizers of A C voltage for stabilization of single-phase voltage of A C power supply source. SUBSTANCE: novelty of proposed design is attributed to usage in circuit of autotransformer and two optotriacs instead of transformer and four thyristors. Stabilizer of A C voltage includes transformer, keys to switch over branches of transformer and system controlling stabilizer that incorporates power supply unit, null detector and pulse formers. Autotransformer is used in the capacity of transformer and optotriacs are utilized instead of keys. System controlling stabilizer has in addition sawtooth voltage generator and comparator. EFFECT: raised operational reliability. 2 dwg