FIELD: electrical engineering. SUBSTANCE: device has charging capacitor C1 and discharging capacitor C2. Method involves charging final element with rated voltage Us applied from series-connected capacitors C1, C2 followed by discharge through recharging capacitor C2. Then charging capacitor is additionally charged by means of adjustable voltage supply to voltage UC1= US-UC2. EFFECT: reduced loss, simplified design. 7 cl, 3 dwg
