Research on Key Technologies of High-power Solid State Distribution for Spacecraft
High-power solid-state power distribution needs to solve the problem of high voltage and current change rate during the switching progress,and suppress the oscillation and high volt-age caused by the drain-source voltage of the power tube during the short-circuit protection process.The control method of"slow turn-on,slow turn-off"is adopted to reduce the voltage and current change rate during the on and off processes.The voltage stress and oscillation of the drain-source voltage of the power tube in the short-circuit protection shutdown are suppressed by reducing the current change rate during the shutdown process and increasing the damping of the oscillation circuit.On this basis,a 160 V/200 A solid-state power distribution prototype is devel-oped,and experimental verification shows that the method adopted is effective.It improves the power distribution reliability of high power loads,and can provide reference for the application of high-power solid-state power distribution in the aerospace field.
spacecraft power systemhigh power solid-state power distributionhigh reliabilityshort circuit protection
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