CONTROLLED KEY ELEMENT Russian patent published in 1994 - IPC

FIELD: conversion equipment. SUBSTANCE: controlled key element has input, common and output terminals to connect correspondingly voltage source and load 9 and capacitor 8. Network composed of element 6 limiting rate of current growth shunted with circuit 7 limiting overvoltage connected in series and of n completely controlled valves also coupled in series is placed between input and output terminals. Each of valves is shunted with network of threshold element 4 and diode 5 connected in opposition. Capacitor 8 is placed between input and output terminals. Each of completely controlled valves can be shunted with resistor and diode inserted in addition. Additional completely controlled valve shunted with RCD network and threshold element can be placed in series with basic completely controlled valve. EFFECT: increased operating voltage. 6 cl, 5 dwg