IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0694694
(2010-01-27)
|
등록번호 |
US-8294394
(2012-10-23)
|
우선권정보 |
EP-09425022 (2009-01-28) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Alenia Aeronautica S.p.A.
|
대리인 / 주소 |
Gottlieb, Rackman & Reisman, P.C.
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
6 |
초록
▼
A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating resistors are provided, which can be connected to the windings of the axial-flux reversible electric machin
A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating resistors are provided, which can be connected to the windings of the axial-flux reversible electric machine during rotation of said wheel for dissipating by the Joule effect the induced currents generated by the axial-flux electric machine, which behaves as current generator, and producing a braking effect that slows down the movement of the wheel, thus exerting a braking action.
대표청구항
▼
1. A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating means being provided, which can be connected to the windings of said axial-flux reversible electric mach
1. A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating means being provided, which can be connected to the windings of said axial-flux reversible electric machine during turning of said wheel during landing for dissipating in the current-dissipating means the induced currents generated by the machine, which behaves as current generator, and producing a braking effect, which slows down the movement of said wheel wherein control means are provided, which are designed to carry out transfer of charge from said accumulation device to said axial-flux reversible electric machine, thus supplying further power for the braking action; andwherein said control means carry out charge transfer when the velocity of rotation of the wheel drops below a first threshold value. 2. The system according to claim 1, wherein the stator of the axial-flux reversible electric machine is fixed with respect to the frame, and the rotor of the axial-flux reversible electric machine is angularly fixed with respect to the wheel. 3. The system according to claim 1, wherein said current dissipator comprise resistor means. 4. The system according to claim 3, wherein said resistor means have variable resistance R(f) that varies on the basis of a command in order to modulate the braking action. 5. The system according to claim 1, wherein an accumulation device is provided, in which electric charge can be accumulated and which can be connected to said axial-flux reversible electric machine to store the charge that has not been dissipated in said current-dissipating means. 6. The system according to claim 1 wherein said control means carry out transfer of electrical energy from an electrical network of the aircraft to said axial-flux reversible electric machine, thus supplying further power for the braking action. 7. The system according to claim 6, wherein said control means carry out transfer of electrical energy from the electrical network of the aircraft to said reversible electric machine when the velocity of rotation of the wheel drops below a second threshold value lower than the first. 8. The system according to claim 1, wherein said control means, following upon completion of the braking operations, are configured for controlling a flow of current from the on-board electrical network to the electric machine in a direction such as to obtain rotation of the reversible electric machine and generation of a torque that obtains displacement of the aircraft on the runway. 9. A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating means being provided, which can be connected to the windings of said axial-flux reversible electric machine during turning of said wheel during landing for dissipating in the current-dissipating means the induced currents generated by the machine, which behaves as current generator, and producing a braking effect, which slows down the movement of said wheel, wherein the axial-flux electric machine is of a three-phase type and comprises a first winding, a second winding, and a third winding, which have first terminals connected to one another and second terminals connected, respectively, to a first electrical line, a second electrical line, and a third electrical line which can be connected to said current-dissipating means. 10. A braking system for an aircraft provided with undercarriage, wherein an axial-flux reversible electric machine is set between the wheel and the frame of the undercarriage; current-dissipating means being provided, which can be connected to the windings of said axial-flux reversible electric machine during turning of said wheel during landing for dissipating in the current-dissipating means the induced currents generated by the machine, which behaves as current generator, and producing a braking effect, which slows down the movement of said wheel wherein the axial-flux electric machine is of a hexaphase type. 11. The system according to claim 9, wherein the stator of the axial-flux reversible electric machine is fixed with respect to the frame, and the rotor of the axial-flux reversible electric machine is angularly fixed with respect to the wheel. 12. The system according to claim 9, wherein said current dissipator comprise resistor means. 13. The system according to claim 9, wherein an accumulation device is provided, in which electric charge can be accumulated and which can be connected to said axial-flux reversible electric machine to store the charge that has not been dissipated in said current-dissipating means. 14. The system according to claim 10, wherein the stator of the axial-flux reversible electric machine is fixed with respect to the frame, and the rotor of the axial-flux reversible electric machine is angularly fixed with respect to the wheel. 15. The system according to claim 10, wherein said current dissipator comprise resistor means. 16. The system according to claim 10, wherein an accumulation device is provided, in which electric charge can be accumulated and which can be connected to said axial-flux reversible electric machine to store the charge that has not been dissipated in said current-dissipating means. 17. The system according to claim 10, wherein the axial-flux electric machine is of a three-phase type and comprises a first winding, a second winding, and a third winding, which have first terminals connected to one another and second terminals connected, respectively, to a first electrical line, a second electrical line, and a third electrical line which can be connected to said current-dissipating means.
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