| 摘要 |
<p>Switching device allowing to supply, without changing connection, from alternating or direct networks of substantially all voltages and frequencies, transportable apparatus such as electric razors, flash for cameras or luminescent tubes. To this effect, a stop transformer (5) is used which controls an output by means of two controlled semiconductors (T1, T2), which depend on the current (11) flowing through the primary winding (N1) of the transformer (5) and on the input voltage (U1), this output having the particular characteristic to be constant. When the consumer apparatus is an accumulator (2) with a motor (1) connected in parallel, the switching device may supply from the network either the total motor output power or, the motor (1) being switched off, the charge current of the accumulator. An additional regulation is dependent on the utilization current so that a motor may be regulated during operation. When supplying a luminescent tube, the light intensity may be adjusted. </p> |
