| 摘要 |
<p>PURPOSE:To smoothly vary load speed by preventing the output of an integrator from being inputted to an internal speed computing element until the output of the integrator arrives at the load speed when a change-over switch on signal is turned on, and leaving a speed command change-over switch without being turned off. CONSTITUTION:A controller which controls speed is constituted of a speed loop computing element 1, the integrator 2, an internal speed loop computing element 3, a power amplifier 4, and the speed command change-over switch 6, etc. And an internal speed command change-over switch 12 and a timing circuit 13 are provided, and a speed command change-over switch on signal 14 is outputted. Thereby, when the above stated change-over switch on signal 14 is inputted, the above stated change-over switch 12 is turned on first via the timing circuit 13, and the speed command change-over switch 6 remains as being turned on. The time constant of an internal speed command 10 becomes large by integrating a speed error 9, and after the lapse of the time, a signal to turn on the change-over switch 12 and to turn off the speed command change- over switch 6 is outputted.</p> |
