| 摘要 |
PURPOSE:To improve the reliability of a phase controlling device at the multiplexing time by calculating simpling pulses in a digital arithmetic unit and tripping a phase control signal from other system. CONSTITUTION:The controlling amount of a power converter using a thyristor is sampled in phase detecting means 11, and a phase synchronizing signal SYNC is outputted. A digital arithmetic unit 13 calculates phase control signals based on the signal SYNC, and butts the phase control signals EC1, EC2 calculated by other system connected to the power converter and the phase control signals calculated by the self system during the previous sampling to generate an optimum phase control signal EC. A gate logic 14 produces a gate pulse to the power converter based on the signal EC. |
