VOLTAGE CONVERTER Russian patent published in 2002 - IPC

FIELD: ac-to-dc voltage conversion for feeding electronic or electrical equipment. SUBSTANCE: converter has diode bridge connected to ac supply mains through first capacitor that functions to reduce supply voltage across pulse regulator or converter. Voltage U_on built up across second capacitor used for filtering rectified voltage upon turning on the converter drives in conduction first transistor that passes dc voltage to regulator. Magnitude of U_on depends on stabilizing voltage of first regulator. Picking off ac voltage reduces input voltage of regulator. As soon as it drops to U_off value depending on stabilizing voltage of second regulator, fifth transistor stops passing current which drives in conduction fourth transistor followed by cutting off transistors forming transistor analog of thyristor. This de-energizes the converter. So converter uses two voltage threshold levels U_on and U_off for setting on- and off-operation moments. EFFECT: provision for eliminating self-excited oscillations in switching modes of operation of regulator or converter. 2 dwg