| 摘要 |
PURPOSE:To obtain a gate drive circuit for semiconductor switch, e.g. thyristor, in the efficiency is enhanced by allowing power supply to the gate drive circuits of a plurality of semiconductor switches connected in series thereby reducing power loss. CONSTITUTION:The gate drive circuit for semiconductor switch comprises a series circuit of capacitors 6, 7 connected in parallel with the snubber capacitor 4 of a semiconductor switch 1, and an energy collection circuit 9 for charging a storage capacitor 8, serving as a power supply for a gate drive circuit 10 comprising the series circuit of the capacitors 6, 7, with a low voltage. |
