| 摘要 |
PURPOSE:To form a digital processor in a circuit adapted to be integrated, and to accelerate a processing time by so setting counting means that the counted value when a motor is rotated at an instructed speed takes a specific value. CONSTITUTION:Counter means 14 for counting a signal from encoder signal generating means 2 is so set that the counted value when a motor 1 is rotated at an instructed speed takes a specific value. Speed error signal output means 20 outputs a bit initially varied in its code as counted from the less significant bit of all bits of the counter means 14 and a bit of less significant bit than this bit as speed error signals. The code of the bit varied initially in its code and the bit of more significant bit of the bit are inverted by code inverting means 16, and the output of the means 16 and a phase error signal are added. Then, the speed error signal and the phase error signal are added and output to a driving circuit 3. |
