Electromechanical braking system with electrical energy back-up and regenerative energy management

• US 20060108867A1
• Filed: 11/30/2005
• Published: 05/25/2006
• Est. Priority Date: 09/17/2004
• Status: Abandoned Application

• Current Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Goodrich Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Ralea, Mihai
• Application Number:
  US11/292,334
• Publication Number:
  US 20060108867A1
• Time in Patent Office: Days
• US Class Current: 303/152
• CPC Class Codes: B60T 1/10 by utilising wheel movement for accumulating energy, e.g. driving air compressors
• CPC Class Codes: B60T 13/741 acting on an ultimate actuator
• CPC Class Codes: B60T 2270/404 Brake-by-wire or X-by-wire failsafe
• CPC Class Codes: B60T 2270/414 Power supply failure
• CPC Class Codes: B60T 2270/82 Brake-by-Wire, EHB
• CPC Class Codes: B60T 8/1703 for aircrafts
• CPC Class Codes: B60T 8/885 using electrical circuitry
• CPC Class Codes: H02J 2310/44 for aircrafts
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices

Abstract

An electromechanical system and system are provided where a controller generates an electrical drive signal for an actuator using power from a power source. A capacitor stores electrical energy and avails the stored energy to the controller when a voltage potential of the store electrical energy is higher than the supply voltage of the power source. The stored electrical energy may originate from the power source and/or regenerative energy produced by the actuator.

Claims

1. An electromechanical braking system for effecting braking of a wheel of an vehicle, comprising:

an electromechanical actuator controller that generates an electrical drive signal for an electromechanical actuator in response to a braking command, the electromechanical actuator controller configured to receive power for the electrical drive signal from a conductor that couples the electromechanical actuator controller to a DC supply voltage power source; and

a capacitive energy storage device configured to store electrical energy from the conductor and supply stored energy to the electromechanical actuator controller for electrical drive signal generation when a voltage potential of the stored electrical energy is higher than the DC supply voltage.

2. The electromechanical braking system of claim 1, wherein the availability of stored energy to the electromechanical actuator controller from the capacitive energy storage device is automatic when the voltage potential of the stored electrical energy is higher than the DC supply voltage.

3. The electromechanical braking system of claim 1, wherein the supply of stored energy to the electromechanical actuator controller from the capacitive energy storage device is made without switching between the capacitive energy storage device and the power source of the DC supply voltage.

4. The electromechanical braking system of claim 1, further comprising an electromechanical actuator that converts the electrical drive signal to mechanical braking force applied to a brake disk stack.

5. The electromechanical braking system of claim 1, wherein the vehicle comprises an aircraft.

6. The electromechanical braking system of claim 1, wherein the capacitive energy storage device is at least one capacitor connected in parallel with a motor driver of the electromechanical actuator controller.

7. An electromechanical braking system for effecting braking of a wheel of an vehicle, comprising:

an electromechanical actuator controller that generates an electrical drive signal for an electromechanical actuator in response to a braking command, the electromechanical actuator controller configured to receive power for the electrical drive signal from a conductor that couples the electromechanical actuator controller to a DC supply voltage power source and the electromechanical actuator controller configured to receive regenerative electrical energy from the electromechanical actuator and couple the regenerative electrical energy to the conductor; and

a capacitive energy storage device configured to store the regenerative electrical energy that has been coupled to the conductor.

8. The electromechanical braking system of claim 7, wherein the capacitive energy storage device supplies stored regenerative electrical energy to the electromechanical actuator controller for electrical drive signal generation when a voltage potential of the stored electrical energy is higher than the DC supply voltage.

9. The electromechanical braking system of claim 8, wherein the supply of stored energy to the electromechanical actuator controller from the capacitive energy storage device is automatic when the voltage potential of the stored electrical energy is higher than the DC supply voltage.

10. The electromechanical braking system of claim 8, wherein the supply of stored energy to the electromechanical actuator controller from the capacitive energy storage device is made without switching between the capacitive energy storage device and the power source of the DC supply voltage.

11. The electromechanical braking system of claim 7, further comprising an electromechanical actuator that converts the electrical drive signal to mechanical braking force applied to a brake disk stack.

12. The electromechanical braking system of claim 11, wherein the electromechanical actuator is back-drivable.

13. The electromechanical braking system of claim 7, wherein the vehicle comprises an aircraft.

14. The electromechanical braking system of claim 7, wherein the capacitive energy storage device is at least one capacitor connected in parallel with a motor driver of the electromechanical actuator controller.

15. The electromechanical braking system of claim 7, further comprising a reverse polarity protection device to reduce application of regenerative electrical energy or stored electrical energy to the power source.

16. The electromechanical braking system of claim 7, further comprising a regenerative clamp configured to dissipate regenerative electrical energy exceeding a predetermined threshold.

17. The electromechanical braking system of claim 7, wherein the stored regenerative electrical energy is generated and reused during an anti-skid operation of the electromechanical braking system.

18. The electromechanical braking system of claim 17, wherein during the anti-skid operation the electrical drive signal controls the electromechanical actuator to intermittently apply a braking force and retract, and the regenerative electrical energy is generated during at least one retraction and the stored electrical energy is supplied to support a subsequent braking force application.

19. A method of providing braking in an electromechanical braking system for a vehicle that includes an electromechanical actuator controller configured to receive power from a conductor that couples the electromechanical actuator controller and a DC supply voltage power source, comprising:

generating an electrical drive signal with the electromechanical actuator controller for an electromechanical actuator in response to a braking command using power from the conductor;

capacitively storing energy from the conductor; and

supplying the stored energy to the electromechanical actuator controller for electrical drive signal generation when a voltage potential of the stored electrical energy is higher than the DC supply voltage.

20. A method of providing braking in an electromechanical braking system for a vehicle that includes an electromechanical actuator controller configured to receive power from a conductor that couples the electromechanical actuator controller and a DC supply voltage power source, comprising:

generating an electrical drive signal with the electromechanical actuator controller for an electromechanical actuator in response to a braking command using power from the conductor; and

capacitively storing regenerative electrical energy from the electromechanical actuator.

21. The method of claim 22, further comprising supplying stored regenerative electrical energy to the electromechanical actuator controller for electrical drive signal generation when a voltage potential of the stored electrical energy is higher than the DC supply voltage.