Prospects in the Field of Energy-Conversion Devices Design for High-Voltage Power Systems

In this paper the comparative analysis of the structures variants of spacecrafts power supply systems with the connection of accumulator battery charge and discharge devices to the output power bus and to the solar battery bus, based on the calculation of energy flows in the system and the calculation of weight dimension characteristics of the estimated components of the system was carried out. Recommendations for choosing the rational structure of space craft high-voltage power supply system in terms of improved specific weight dimension characteristics and requirements for its energy-converting devices design are presented. The need to develop energy-converting devices with high values of efficiency has been proved and the expediency of designing it on the basis of combined modules is justified. The integrated charge-discharge module for the high-voltage power supply system on the basis of the bridge boost converter with an active rectifier (1400 W), providing a reversible mode of operation, used to charge the accumulator battery, is proposed. Experimental studies of the charge-discharge module were carried out. It is proved that the module provides limitation of the battery discharge current (15 A), the implementation of transistors soft switching and the achievement of efficiency is not less than 96 %.