SPACECRAFT ELECTRIC POWER SUPPLY SYSTEM Russian patent published in 2017 - IPC H02J7/34 

FIELD: physics, instrument-making.

SUBSTANCE: invention relates to conversion equipment, particularly to on-board electric power supply systems of spacecraft, and can be used when designing and making electric power supply systems of automated spacecraft based on solar and accumulator batteries. According to the invention, the spacecraft electric power supply system comprises a solar panel, an accumulator battery, a voltage stabiliser and a charging device, which are made in form of bridge control inverters, a discharge device, two separate matching transformers, two rectifiers, a control system with extremal power control, a device for monitoring charge condition of the accumulator battery, a current sensor and a load. The technical result of the invention is high energy efficiency of the spacecraft electric power supply system due to implementation of extremal power control of solar panels both in AB charge mode and in combined power mode of the on-board load from SB and AB, enabling use of a solar panel with operating point voltage both higher and lower than the stabilised output voltage of the load supply bus, enabling use of an accumulator battery with any nominal voltage lower than the output stabilised load supply voltage, as well as easy matching of SB, AB and load voltages, which prevents the open-circuit voltage of the solar panel from exceeding 170 V, which prevents electrostatic discharge between SB photodiode circuits and current terminal elements.

EFFECT: invention provides higher energy efficiency of spacecraft power supply system.

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