| 摘要 |
PROBLEM TO BE SOLVED: To efficiently obtain a leading angle amount or an overlapping amount from rotational speed data of a motor. SOLUTION: A rise of a control signal of one phase (AB) in which the leading angle amount Tf is set by rising one sensor signal (AH) according to an output of a comparator when a period of (Tf/12-Tf) is elapsed from a fall of the signal (AH), is obtained. The overlapping amount can be set by deciding a fall of a control signal (BB) of another phase at a time point when an overlapping amount T is elapsed from the rise of the AB. Thus, the rise of the AB is decided from the fall of the AH, and the fall of the BB is decided from the rise of the AB. The rise of the BB and the fall of a CB are decided from the fall of a BH. Thus, the control signal obtained by considering the leading angle amount and the overlapping amount is formed. |
