| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a brushless motor which can be stably started and is capable of shortening a startup time.SOLUTION: When a rotation command is issued (S1), a control signal of a duty ratio D1 is applied to a predetermined two-phase motor winding for a predetermined time (Phase 1) (S2). Next, a control signal of a duty ratio D2 larger than the duty ratio D1 is applied to the two-phase motor winding (S3), and it is determined whether position detection of a motor is performed (S4). The control signal of the duty ratio D2 is set on the basis of a drive voltage applied to the motor, and is set so as to reduce the duty ratio as the drive voltage applied to the motor becomes higher. |
