| 摘要 |
PURPOSE:To simplify the circuit configuration by connecting four coil groups in series, and connecting transistors among the both ends of the coil groups, 3 connecting points and a power source, thereby reducing the number of the transistors. CONSTITUTION:Four coils phi1-phi4 of a stepping motor are connected in series, transistors SW1-SW5 are connected among the positive side of a power source E, the both ends (a), (e) of a coil group, connecting points (b), (c), (d), and transistors SW6-SW10 are connected among the negative side of the power souce E, the both ends of the coil group, and connecting points. In step 1, the transistors SW1, SW3, SW7, SW9, SW10 are closed to flow a current in a direction of a soild line, and in step 2, the transistors SW3, SW5, SW6, SW7, SW9 are closed to flow a current in a direction of a broken line. Thus, the exciting state of the coils are sequentially altered to drive the motor. |
