| 摘要 |
PURPOSE:To accurately control the rotating speed of a DC motor to the prescribed value with a simple structure by temporarily charging counterelectromotive force of the winding of the motor in a capacitor, and supplying the counterelectromotive force charged in the capacitor suitably in the winding of the motor. CONSTITUTION:When a motor is driven, a counterelectromotive force is generated in a direction that the voltage terminal 5 of a power source side becomes negative. A diode 6 is conducted by the counterelectromotive force, and a capacitor 7 is charged. The counterelectromotive force charged temporarily in the capacitor 7 is supplied to the winding 1 of the motor when the second SW transistor 4 which operates ON or OFF reversely to the first SW transistor 3 is turned ON. A reverse brake is applied to the motor at this time. |
