Time-Sharing High-Frequency High-Power Thyristor Switching DC-DC Converters with Energy-Storage and-Transfer Reactor Links

This paper is mainly concerned with the latest strong technological developments on high-power fast-response switching dc-dc converters controlled by time-sharing/sequencial high-frequency thyristor resonant chopper comprising energy-storage and-transfer reactor assemblies, which can operate over an ultrasonic chopping frequency region in the extent of 20 KHz or more than 20 KHz or so. The possible time-sharing circuit configurations of some thyristorized step-up and-down switching converters relating to new magnetic-power semiconductor combination systems and their unique features are firstly described from a practical point of view and discussed on the basis of power transistor type switching dc-dc convertor. The general procedures of circuit analysis using analytical method and performance evaluations to clarify the operating characteristics and to offer some desirable design data are presented generally. The steady-state open-loop control strategy are elucidated on the basis of the theoretical and experimental results. Furthermore, a new thristorized high-power high-frequency energy-storage step-up switching dc-dc converter using successful time-sharing control technique and load voltage commutation procedures are originally examined and minutely discussed herein.