| 摘要 |
PURPOSE:To enable to drive a single motor by the voltages of a plurality of power sources by connecting a reactor and a capacitor between the power source and the motor, and regulating the voltage by switching the capacitor and the speed by switching the reactor windings. CONSTITUTION:A reactor for regulating a speed to switch taps 4-6 via a speed changing switch 7 and a capacitor 11 for decreasing capable of shortcircuiting via a voltage changing switch 12 are connected between a power source 1 and a motor 2. The capacitor 11 is shortcircuited by the switch 12 when the power source 1 is equal to the rated voltage of the motor 2, the speed is regulated by switching the taps of the reactor 3 by the switch 7. When the power source 1 is at a high voltage, the switch 12 is shifted to the capacitor 11 side to decrease the voltage, and the switch 7 is regulated at the speed. Accordingly, the same motor can be readily controlled at the speed by a plurality of power source voltages, thereby simplifying the structure to reduce the cost. |
