| 摘要 |
<p>PURPOSE:To obtain a correction factor precisely by arithmetically operating the correction factor after a fixed time passes after operation mode is switched over to coasting from power running or regenerative running. CONSTITUTION:Pulse generators 4, 4a are installed to a motor 2 and a non-drive wheel 5. Since output frequency from the pulse generators is not necessarily made to correspond to the rotational speed of the motor 2 at the ratio of 1:1 by the difference of the diameters of a wheel 1 and the wheel 5, a correction- factor setting circuit 7 is mounted. The correction-factor setting circuit 7 sets a correction factor so that the difference of output frequency f0'' from a correction circuit 6 and output frequency f0 from the pulse generator 4 reaches zero on coasting. When a controller receives a command from a master controller 10 and the state of coasting continues for a fixed time at that time and deceleration of a specified value or less is detected by a deceleration counting circuit 9, the correction-factor setting circuit 7 is operated.</p> |
