| 摘要 |
PURPOSE:To achieve an accurate driving at a high torque state even with a limited capacity of the power source by rotating a motor with a discharged current of a capacitor which is charged at each cycle of oscillation of a oscillator circuit. CONSTITUTION:When the output of a oscillator circuit 9 is at a level H, transistors Tr3, Tr4 and Tr2 are turned OFF and a transistor Tr1 is turned ON and current is fed to a capacitor 8 from a power source 6. Then, when the output of the oscillator circuit 9 turns to a level L, the transistors Tr3, Tr4 and Tr2 are turned ON and the transistor Tr1 is turned OFF and current discharged from the capacitor 8 is fed to a motor 1 to rotate the motor 1 for very short time. The oscillation cycle of the osillator circuit 9 is determined according to the capacity of the power source 6. This enables accurate rotation of the motor even at a high torque state with a small capacity of the power source. |
