| 摘要 |
The windings of a stepping motor are sequentially energized to drive the motor. A tachometer on the motor shaft produces a signal indicative of motor speed and direction which is converted to a binary signal indicative of whether or not the motor is rotating. The motor is stopped by a reverse torque braking signal produced in response to the concurrent presence of a control signal and a binary signal which indicates that the motor is rotating.
|
