| 摘要 |
PURPOSE:To operate a voltage setter of an automatic voltage control system at both trial transmission and normal operation times by employing a field current control system at the switching time from the trial transmission to the normal transsmision. CONSTITUTION:A trial transmission switching contact 314 is closed at the trial transmission time, and the output of a voltage deviation amplifier 304 is outputted through a voltage control system contact 305. An automatic follow-up device 308 regulates a field current setter 310 so that the output of a voltage deviation amplifier 304 coincides with that of a field current deviation amplifier 311 at this time. When the trial transmission is switched to the normal transmission, a field current control system switching contact 312 is first closed, and a normal operation switching contact 315 is closed. The voltage setter 303 is regulated by the device 308 so that the outputs of amplifiers 311 and 304 coincide. Subsequently, a voltage control system switching contact 305 is closed to enter the normal operation. |
