Power supply system for an aircraft actuator

A power supply architecture for powering aircraft actuators, the architecture comprising a single-phase on-board electricity network connected by a power supply circuit to an electric motor of at least one actuator, the power supply circuit comprising in succession an upstream converter device for converting a voltage of the single-phase on-board single-phase electricity network into a voltage adapted to the power supply circuit downstream therefrom, at least one supercapacitor associated with an electronic circuit for managing the operation of the supercapacitor, and a downstream converter device for connecting to the motor;

• the downstream converter device being reversible, so as to convert voltage both when the motor is operating in motor mode and also when the motor is operating in generator mode, the downstream converter device being arranged selectively to have a voltage-decreasing function and to have a voltage-increasing function regardless of the mode of operation of the motor, in such a manner as to enable the supercapacitor to power the motor when operating in motor mode and to be recharged by the motor when operating in generator mode, wherein the on-board single-phase electricity network delivers a DC voltage, the upstream converter device comprising a DC/DC converter arranged to be reversible and to have both a voltage-decreasing function and also a voltage-increasing function to allow energy to be delivered from the supercapacitor to the on-board electricity network.