| 摘要 |
The invention relates to a device and method for generating a stabilized low operating voltage by means of the motor winding without the need of other winding items. A capacitor (3) mounted in series with a diode (2) and parallel to the motor winding (1) is charged with the discharge current of the motor winding that was previously charged from a voltage source (5) via a switch (4). The periodic closing and opening of the switch ensures a continuous re-charging of the capacitor. The low operating voltage at the capacitor is controlled by adjusting the ratio of the switched-on period to the total duration of a switch-on/off cycle. Alternatively, the connection between diode and capacitor can be opened via an additional switch and the diode can be mounted directly parallel to the motor winding so that the discharge current is short-circuited. The charging time of the capacitor and thus the voltage at the capacitor can be adjusted or regulated by means of a regulation loop. |
