FIELD: electrical engineering.
SUBSTANCE: invention relates to power supply circuits of an electric propulsion system. Circuit (400, 700, 800) comprises a first power supply (402) supplying the first current to the load (470) during the first time period ("TP"); second power supply (416) supplying a second current to said load during a second TP; a unidirectional current valve ("UCV"), connected in series with the first power source; current detector (420, 702, 802) connected in series with (UCV) (422); and switch (424) connected in parallel to the series circuit of said current detector and UCV to shunt the UCV to the second TP. Current detector determines whether a second period of time has elapsed and the switch is closed.
EFFECT: increase the reliability of work by preventing damage to the UCV.
20 cl, 9 dwg
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