Developing a Battery Discharge Regulator Using Fuzzy Logic to Guarantee the Lowest Output Current Ripple for an Electrical Power System in a Geostationary Satellite

The conventional Weinberg converter is primarily used in battery discharge regulators (BDR), which are parts of the overall electrical power system for geostationary satellites. This is because of its high efficiency, continuous input and output current, and soft switching of its switches and diodes. Still, one major issue with this converter is that when its output diodes are commutating, there is a significant amount of output current ripple. As a result, there is a significant ripple in the output voltage and root mean square (RMS) current. This might have a direct impact on the bus capacitors’ lifespan and total capacitance, which would then have an impact on the geostationary satellite’s size and longevity. Therefore, while building the electrical power system for a geostationary satellite, decreasing the ripple in the BDR’s output current is crucial. Consequently, in order to lower the output voltage ripple and output current ripple, this research suggests an enhanced Weinberg converter. In particular, the suggested converter decreases the magnetizing current offset of the coupled inductor in addition to having a lower output current and voltage ripple than the standard converter. Additionally, it can achieve high efficiency and soft switch all switches, just like a normal converter, without having to deal with the diodes’ reverse recovery issue. Overall, test findings from a prototype with a 750 W rating validate the suggested converter.