STABILIZED DC VOLTAGE SOURCE Russian patent published in 2003 - IPC

FIELD: electrical engineering. SUBSTANCE: invention is meant for use in electric power supply systems in the capacity of DC voltage source. Stabilized DC voltage source includes transformer with two primary windings, first winding being connected with its first leads directly to AC network, second winding being displaced in space relative to first winding through angle of 90 deg and is connected with first lead directly to network and with second lead through phase-shifting capacitor. Rectifier and filter are connected in series between secondary winding of transformer and leads for connection of load. Windings of transformer are placed on toroidal magnetic core. Commutation unit comprises two controlling elements connected in parallel opposition and phase shifting capacitor is connected in parallel. Transistors are used in commutation unit in the capacity of controlling elements. DC voltage source has stabilization system including voltage divider, pulse former, sawtooth voltage generator, sensor of voltage polarity, first and second logic AND gates, first and second pulse amplifiers. Input of voltage divider is connected to output of filter and its output is coupled to one input of pulse former which second input is connected to outputs of sawtooth voltage generator. Inputs of sawtooth voltage generator and sensor of voltage polarity are connected to leads for connection of AC network, outputs of sensor of voltage polarity are connected to first inputs of first and second logic AND gates which second inputs are connected to output of pulse former, outputs of first and second logic AND gates are connected through corresponding first and second pulse amplifiers to controlling electrodes of first and second transistors of commutation unit. EFFECT: increased functional reliability of source, raised speed of response of voltage stabilization system, improved form of curve of output voltage of transformer with rotary magnetic field. 4 dwg