| 摘要 |
PURPOSE:To reduce an overshoot by obtusely forming the rise of a motor winding current with a switching signal for obtusely forming the rise. CONSTITUTION:Exciting signals are respectively applied to the corresponding terminals of a drive IC1, and simultaneously switching signals A', B for obtusely forming the rise are formed through OR gates 9, 8, a resistor R, and a capacitor C. Transistors 3, 4 are controlled by the signal in switching state. Thus, the rise of a reference signal to be applied to a comparator 1 is obtusely formed, and the rise of the motor winding current is obtusely formed. Thus, the overshoot can be reduced, and a noise caused thereby can be suppressed. |
