| 摘要 |
PROBLEM TO BE SOLVED: To solve unstable operation, when a frequency detection means executes stepping driving and brushless drive, to stably operate respective drives and to precisely switch driving in the drive device of a stepping motor used in OA and an information unit. SOLUTION: A signal processing circuit 8 is installed and a signal for executing drive without brush is outputted from a drive circuit 2 from the signals of a position detection means 6 and a frequency detection means 7. At the switching of stepping drive, rotor information is outputted to a microstep circuit and therefore the drive device of a stepping motor, which is driven with a stable conduction signal and can precisely switch drive, is obtained. |
