SINGLE-CYCLE D C/D C CONVERTER Russian patent published in 1994 - IPC

FIELD: radio engineering. SUBSTANCE: single-cycle D.C./D.C. converter is meant for conversion of direct voltage used in secondary power supply systems. It includes power multiwinding choke 1 forming together with capacitor 2 oscillatory circuit and connected in series with power transistor 4. Power multiwinding choke 1 is provided with secondary windings linked to rectifiers 7 and capacitive filters 8. Winding 1.4 of positive feedback is connected via current limiting unit to base of power transistor 4. Level of current limiting is set by current transformer 3 which primary winding 3.1 is placed into power circuit and which secondary winding 3.2 is linked to controlling input of current limiting unit. Switching off of current in each cycle is carried out by switch 10 coupled with input to comparator 9 and with output to second controlling input of current limiting unit. RC network 22 connected to input leads of converter and to third input of current limiting unit provides for triggering of converter. EFFECT: improved operational characteristics. 3 cl, 2 dwg