| 摘要 |
PURPOSE:To control the number of revolutions with high accuracy regarding a motor control apparatus whereby the number of revolutions of a DC brushless motor is controlled. CONSTITUTION:Frequency dividers 24A to 24D which detect respective time intervals between pulse signals of the same pole on the basis of pulse signals corresponding to polar positions of a motor 1 are installed. Angular-velocity detectors 28A to 28D which generate respective angular-velocity signals on the basis of the time intervals from the individual frequency dividers 24A to 24D. And acceleration detectors 32A to 32D which generate angular acceleration signals on the basis of the difference between adjacent angular velocity signals are installed. Then, a phase detector 25 which detects a rotational phase from the frequency divider 24A is installed. An angular-velocity changeover device 29 which sequentially selects the individual angular-velocity signals is installed. An angular-acceleration change-over device 33 which sequentially selects the individual angular acceleration signals is installed. |
