| 摘要 |
A unidirectional alternating current interrupter operable over full half cycles controls the passage of positive half cycles of a supply voltage VA into a load 2 disposed in series with a gate junction thyristor 10, a capacitor 13, an N-resistor 12 and a diode 11 are arranged at the terminals of the supply voltage. In this way, during negative half cycles, the capacitor 13 is charged and the gate junction thyristor 10 is rendered conducting from the beginning of the subsequent positive half cycle. To prevent energization of the gate junction thyristor 10 at the end of a negative half cycle, a controlled interrupter is arranged in parallel with the capacitor 13. When this interrupter 15 is closed, the gate junction thyristor 10 cannot be rendered conducting.
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