Current characteristic of high voltage capacitor charging power supply using a series resonant topology

Pulse power supply applications usually require short and intense bursts of energy that may be derived by rapidly discharging an energy storage capacitor. Series resonant topology is used in capacitor charging power supply because of its approximate constant current characteristic from zero volts to maximum voltage. But the series resonant topology with open-loop control is not accurate constant current charging characteristic because the DC bus voltage is variable and the transformer is not ideal. Furthermore, the high voltage rectifier diodes are also not ideal. This paper presents the current characteristic of series resonant power supply with ideal and actual components, respectively. And moreover, some valuable figures given in this paper can be used during the course of designing and debugging.