| 摘要 |
PURPOSE:To delete the number of memories thereby to prevent a rotating speed from varying due to a variation in a load torque and to alleviate the restriction of a calculating time by forming a new control signal whenever 1 new rotation error occurs, and updating one memory value whenever two or more new rotation errors are obtained. CONSTITUTION:A calculator 5 of a compensator 4 reads out a digital signal (b) of a speed detector 3 to correct it to a speed detection value S. This value S is subtracted from a reference value to calculate the rotating error E of a motor 1. A control signal Y is calculated from the error E and the output value V0 of a memory 6, output to a D/A converter 7, which converts it to a control signal C. In this case, a composite error Eg is formed from a plurality of errors E, aud the output value V0 of the memory 6 is updated and stored by using the error Eg. Since this series of operations are divided into a plurality of partial operations, necessary calculating amounts can be reduced. |
