| 摘要 |
PURPOSE:To improve the control accuracy by compensating for a delay in the response of a motor owing to a friction torque with generation of a compensation voltage reverse in the polarity but equal in the absolute value to the voltage which determines a current command value in the inputted of a direction reversion signal. CONSTITUTION:To ensure the control of a D.C. motor 10 according to a command from a command pulse generator circuit 16 of an NC control, a compensation voltage generator circuit 50 and a response compensation circuit 51 are attached to a phase compensation circuit 12 thereof. When a reversion signal of the motor 10 is provide, the compensation voltage generator circuit 50 detects a voltage of the phase compensation circuit 12 and generates a compensation voltage equal in the absolute value but opposite in the polarity thereto so that it may be compared with a command voltage in the response compensation circuit 51 to be fed back to the phase compensation circuit 12. This can make the command voltage equal to a voltage corresponding to a friction torque associated with the reversion of the motor as soon as possible after the inputting of a reversion signal thereby enabling the compensation for a delay in the response. |
