Two-cycle DC-DC Converter for Spacecraft Power Conversion Equipment

This paper investigates an autotransformer-based DC-DC converter capable of operating in various modes. The investigated converter will allow to reduce the mass and dimensions of the components of the power supply system of aircraft, due to the use of a single set of power switches to realize the charge and discharge of the battery. The selection of the mode of operation as well as the magnitude of the charge current or the magnitude of the load voltage depends on the duty cycle of the switches. This allows to use a similar algorithm for controlling the switches for different modes of operation of the converter. This paper investigates a converter without feedback. A mathematical model is developed for implementing the declared operating modes of the circuit in spacecraft power supply systems. Analytical expressions are derived for selecting the converter's operating mode, and simulation modeling and testing on a physical prototype are performed.