| 摘要 |
PURPOSE:To obtain the shaft rotation of a motor having almost no ripple by multiplying to convert a stored data by an analog speed signal. CONSTITUTION:A compensating data 11 is written in a memory 10 made of a ROM by using the digital position signal 7 of a R/D converter 6. The data 11 is output as a stored data 13 for the same phase and reverse polarity with respect to a ripple 12. Since an analog speed signal 8 is multiplied by the data 13 by a multiplication type D/A converter 14 and then converted, an analog speed signal 15 of the stable state having no ripple after compensation is obtained. The signal 15 after the compensation is applied to an adder/subtractor 9, and supplied to a motor 3 through a controller 1. |
