Charging circuit for energy storage capacitors

摘要

The present invention describes a charging circuit for energy storage capacitors which is especially useful in charging the energy storage capacitors used to provide the voltage supply of flashlamps in photocopying machines. The charging circuit has two series-connected d.c. converters and a current limiting device. The current limiting device has a measuring circuit for determining the current through the second d.c. converter, which is related to the output current of the first converter, and a regulating circuit for regulating the output current of the first d.c. converter and thus indirectly regulating the output current of the second d.c. converter.