| 摘要 |
PROBLEM TO BE SOLVED: To provide a sensorless motor device that requires no voltage sensor and eliminates the need to provide a data table for deriving a rotational position of a rotor from the inductance of a motor.SOLUTION: There is provided a sensorless motor device, including a two-phase motor, that includes: a drive circuit which supplies drive electric power to the two phases of a motor respectively; a current sensor which detects currents of the drive electric power supplied from the drive circuit to the two phases of the motor respectively; and control means of controlling the drive circuit so as to supply the same drive electric power to the two phases from the drive circuit to the two phases of the motor when starting rotating the motor, then comparing current values of the two phases with each other based upon a detection result of the current sensor, and controlling the drive circuit so as to stop supplying the drive electric power corresponding to a first current value when a current value (first current value) determined through the comparison to be lower reaches its peak. |
