Patent ID: 8505697

Claim:
A braking system for an aircraft ( 2 ) provided with an undercarriage ( 7 ) including a wheel ( 10 ), comprising: an axial-flux reversible electrical machine ( 20 ) associated with at least one wheel of the undercarriage and set in rotation by the rotation of the wheel, the electrical machine having at least one rotor ( 32 a , 32 b , 32 c ) and at least one stator ( 34 a , 34 b ) with windings ( 36 a , 36 b , 36 c ); current-dissipator means ( 40 a , 40 b , 40 c ) to the windings ( 36 a , 36 b , 36 c ) of the axial-flux reversible electrical machine ( 20 ) during rotation of the wheel ( 10 ) in a landing phase for dissipating in the current-dissipator means ( 40 a , 40 b , 40 c ) the induced currents generated by the electrical machine ( 20 ), functioning as a current generator ( 20 ), and producing a braking effect that slows down the movement of the wheel ( 10 ); an epicyclic reducer ( 21 ) set between the wheel ( 10 ) of the undercarriage and the at least one rotor ( 32 a , 32 b , 32 c ) of said reversible electrical machine ( 20 ); an accumulation device ( 46 ) connectable to the axial-flux reversible electrical machine ( 20 ) for storing the electrical charge not dissipated in the current-dissipator means ( 40 a , 40 b , 40 c ); and control means ( 50 ) for governing the transfer of electrical charge from the accumulation device ( 46 ) to the axial-flux reversible electrical machine ( 20 ) for supplying further power for braking; the control means ( 50 ) also governing the transfer of electrical charge from the accumulation device ( 46 ) when the velocity of rotation of the wheel drops below a first threshold value; the control means ( 50 ) further governing the transfer of electrical energy from an electrical network ( 55 ) of the aircraft to the reversible electrical machine when the velocity of rotation of the wheel drops below a second threshold value lower than the first threshold value; the epicyclic reducer ( 21 ) providing a transmission ratio T in such a way that the at least one rotor ( 32 a , 32 b , 32 c ) will turn at a velocity Tω with respect to the velocity of rotation ω of the wheel ( 10 ).