| 摘要 |
<p>Battery charging circuit having a mains transformer with a primary and a secondary winding, at least one capacitor connected in series with a terminal of the secondary winding, and a pair of diodes connected with their different electrodes to an other terminal of the secondary winding, wherein the other electrodes of the diodes (D1,D2) constitute output terminals for connection to a battery (B) to be charged, the terminal of the capacitor (C1) other than that connected to the secondary winding is connected to one of the output terminals, furthermore the capacitor (C1) is an electrolytic capacitor with at least 100 µF capacitance, and at least one further electrolytic capacitor (C2,C3) with similar capacitance can be connected in parallel to the first capacitor by means of a controlled semiconductor switch (K3), and at least one of the primary and secondary windings (1,2) comprise tap points lead out and connectable through an associated switch (K1,K2).</p> |
