| 摘要 |
PROBLEM TO BE SOLVED: To operate a generator motor continuously at allowable vibration level by sustaining the rotational speed of generator motor as it is when the vibration deviates from an allowable level and then increasing (decreasing) the rotational speed abruptly to an allowable high (low) rotational speed upon elapsing a predetermined time. SOLUTION: A controller 9 receives the rotational speed of a generator motor from a rotational speed detector 10 and the detection signal from a vibration sensor 12 for detecting the vibration of floor 8 of a control board 11 amplified through a vibrometer 13. The controller 9 delivers a control signal to a cycloconverter 5 and a guide vane 14 and controls the rotational speed and exciting current of generator motor such that the vibration of floor 8 of control board 11 is settled within an allowable value. When the vibration deviates from a predetermined allowable value, rotational speed of generator motor at that moment of time is sustained as it is and then the rotational speed is increased (decreased) abruptly to an allowable high (low) rotational speed upon elapsing a predetermined time. |
