| 摘要 |
PURPOSE:To improve response and to obtain stable control characteristic by providing motor start detecting means, means for detecting immediately before stop, increasing a gain by a signal of the start detecting means by gain varying means and decreasing the gain by a signal of stop detecting means. CONSTITUTION:A start command discriminator 14 for identifying whether a motor 10 becomes a driving state from a stopping state by a command speed signal or not is provided, and a gain of a gain varying PI compensator 4 is set to a high value by a signal output in a driving state. A stop command discriminator 15, and a stop discriminator 16 for identifying whether it is a state immediately before a stop by a signal from a speed sensor are provided, the outputs of the discriminators 15, 16 are inputted to the compensator 4 through an AND gate 17, and the gain can be set to a low value. Thus, satisfactory response and stable control characteristic of the motor 10 can be obtained. |
