Feasible characteristic evaluations of resonant tank PWM inverter-linked DC-DC high-power converters for medical-use high-voltage application

The main purpose of this study is to describe the particular characteristic features and inherent benefits of series, parallel and series-parallel resonant tank inverter-fed DC-DC power converters with a high-voltage high-frequency transformer link for medical-use X-ray high-voltage power generators from a practical application viewpoint, along with a specially-designed high-voltage transformer and its dynamic circuit modeling considering iron and copper loss resistances. An effective method to take advantage of the harmful parasitic resonant circuit parameters of the high-voltage high-frequency transformers which are used in three typical resonant tank circuit topologies and their output voltage performances in both the steady and dynamic-states are comparatively discussed. The dynamic and steady-state characteristics of these resonant power converters are evaluated on the basis of computer simulation results under the conditions of wide allowable load ranges used in actual X-ray high-voltage DC power generators