| 摘要 |
PURPOSE:To permit stabilizing analog/digital relay control by utilizing the junction capacitance of a diode bridge wherein on and off operations of an alternating voltage-current control circuit including a thyristor are done. CONSTITUTION:A controlled section 4 is connected to an AC power source 8 and a diode bridge 3 is also connected to the AC power source. A transistor 1 and a thyristor 2 are connected to the output side of the diode bridge 3, and a gate circuit 9 consists of resistors R9a, R9b and a capacitor C9 is connected across the base B of the transistor 1 and the gate G of the thyristor. A status amount detection section 6 is connected across the collector C and base B of the transistor 1. With the applied voltage to the base of the transistor 1 increased, the thyristor 2 is driven to on conditions by receiving the pulses in the gate circuit 9. The magnitude of the pulses of the gate circuit 9 is controlled by an integrating circuit including a capacitor C9, resistors R9a, R9b. Therefore, the desired triggers of the gate are obtained. |
