| 摘要 |
PURPOSE:To alleviate the di/dt duty of a GTO by removing the resistor of a snubber of a positive/negative arm element, connecting the snubber condenser side of a diode of both snubbers through a resistance circuit, thereby discharging the condenser through a reactor. CONSTITUTION:A snubber 6U has a snubber condenser 61u and a snubber diode 62u connected in series with the condenser, and is connected in parallel with a GTO1U. A snubber 6X has a snubber condenser 61x and a snubber diode 62x connected in series with the condenser, and is connected in parallel with a GTO1X. The anode side of the snubber diode 62u of the snubber 6U and the cathode side of the snubber diode 62x of the snubber 6X are connected through a resistance circuit 7. The condensers 61u, 61x are discharged through reactors 2U, 2X at the positive and negative arms. |
