Flight control system regenerative braking

A high lift system of an aircraft, comprising:

• a plurality of high lift surfaces movably arranged at a wing;
• a plurality of drive stations coupled with the high lift surfaces;
• a transmission shaft coupled with the plurality of drive stations;
• a power drive unit coupled with the transmission shaft for moving the high lift surfaces, the power drive unit comprising at least one electric motor operably;
• and
• a control unit, the control unit operably coupled to the power drive unit, the control unit configured to execute a method for regeneratively braking the at least one electric motor, the method including measuring magnitude of a motor control signal and a direction of the at least one electric motor, based on the braking requirement, applying a braking command to the at least one electric motor, the braking command comprising a command of substantially equivalent magnitude of the magnitude of motor command signal that will drive the at least one electric motor in an opposite direction, and reducing the braking command as the at least one electric motor comes to rest;
• the system further comprising a regenerative bus monitor operably connected to the control unit and a DC bus configured to provide energy to the at least one electric motor.

A high lift system of an aircraft, comprising:

• a plurality of high lift surfaces movably arranged at a wing;
• a plurality of drive stations coupled with the high lift surfaces;
• a transmission shaft coupled with the plurality of drive stations;
• a power drive unit coupled with the transmission shaft for moving the high lift surfaces, the power drive unit comprising at least one electric motor;
• a motor drive system operatively coupled to the at least one electric motor, the motor drive system including a regenerative monitor apparatus configured to shunt a DC bus of the motor drive system;
• a control unit, the control unit operably coupled to the motor drive, the control unit operably controlling the regenerative monitor apparatus to brake the at least one electric motor under selected conditions;
• and
• a power off brake, the power off brake operably coupled to at least one of the at least one electric motor and the control unit.