| 摘要 |
PURPOSE:To prevent a sheet from unintentionally moving when a motor is stopped by flowing an excitation holding current to the specific exciting coil even after the motor is stopped. CONSTITUTION:A switching circuit 12 is controlled by a clock pulse detector 13, and when a clock pulse CP is supplied to an input terminal 11, a reference DC voltage source 8 is selected, and after the prescribed time T is elapsed when the clock pulse CP to the terminal 11 is interrupted, a reference DC voltage source 8' is selected. Accordingly, currents flowed to an exciting coil and a switching transistor at the stopping time becomes values smaller than those at the operating time. |
