| 摘要 |
PURPOSE:To prevent step-out and abnormal motion of an actuator, by providing a voltage discriminating means, which discriminates whether a source voltage exceeds a specified value and a means which stops energization of the actuator during a specified time. CONSTITUTION:When a source voltage VB becomes below a specified value E1, a signal from an output terminal T1 of a source voltage discriminating circuit 50 produces a low level. As a result, an inverter 60 outputs a stop signal of a high level to a driving direction switching circuit 59, and control of the position of an actuator 61 is stopped. When a source voltage is recovered to higher than the specified value E1, a stop signal fed to the driving direction switching circuit 59 is rendered ineffective. A signal from a one shot multi 53 is fed to an initial processing circuit 55. This enables prevention of step-out and abnormal motion of the actuator. |
