IP Library › Granted Patent US 11,787,575
Granted Patent B2
US 11,787,575 · App. 17/840,463 · Granted Oct 17, 2023

Method of propulsor management in electric aircraft

Inventors: Christopher J. Woodall (Burlington, VT); Riley Griffin (Montpelier, VT); Herman Wiegman (Essex Junction, VT)
Assignee: BETA AIR, LLC
B64U30/296B64C29/0033B64D27/24B64D2221/00
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Quick Facts
Patent No.
US 11,787,575
App. No.
17/840,463
Granted
Oct 17, 2023
Kind
B2
Abstract

A system and method for management of propulsors for an electric aircraft, where the electric aircraft is configured to transition between a hover state and a fixed-wing flight state. The electric aircraft may include at least one set of a plurality of propulsors coupled to the electric aircraft. A flight controller may be coupled to the electric aircraft and configured to detect a state transition of the electric aircraft from the hover state to the fixed-wing flight state and send a parking command to the at least one set of a plurality of propulsors.

Claims (30)

1. A system for propulsion management of an electric aircraft, the system comprising:

an electric aircraft configured to transition between a hover state and a fixed-wing flight state;

at least one set of a plurality of propulsors coupled to the electric aircraft; and

a flight controller coupled to the electric aircraft, wherein the flight controller is configured to:

detect a state transition of the electric aircraft from the hover state to the fixed-wing flight state;

determine a minimal drag axis based on surrounding airflow of the electric aircraft; and

send a parking command to the at least one set of a plurality of propulsors, wherein the parking command causes a first inverter to move a first propulsor to a parked position aligned with the minimal drag axis.

2. The system of claim 1 , wherein the electric aircraft includes an eVTOL aircraft.

3. The system of claim 1 , wherein the at least one set of a plurality of propulsors is aligned with the minimal drag axis of a direction of airflow.

4. The system of claim 1 , wherein the at least one set of a plurality of propulsors is aligned with a longitudinal axis of the electric aircraft.

5. The system of claim 1 , wherein the at least one set of a plurality of propulsors further comprises two blades positioned opposite one another.

6. The system of claim 5 , wherein the minimal drag axis aligns along a path from one distal end of a first blade of the two blades to a second distal end of the second blade of the two blades.

7. The system of claim 1 , wherein the flight controller is configured to send a command to the at least one set of a plurality of propulsors to unpark.

8. The system of claim 1 , further comprising a first set of inverters and a second set of inverters, wherein the parking command causes the first set of inverters to hold the at least one set of a plurality of propulsors in a parked position and the second set to generate zero torque.

9. The system of claim 1 , wherein the flight controller is configured to send the parking command to park the at least one set of a plurality of propulsors within a 2-degree tolerance level.

10. A method of propulsor management of an electric aircraft, the method comprising:

selecting an electric aircraft configured to transition between a hover state and a fixed-wing flight state, wherein the electric aircraft has at least one set of a plurality of propulsors coupled to the electric aircraft;

determining a state of the electric aircraft via a flight controller, wherein the flight controller is configured to detect a state transition of the electric aircraft;

determining, via the flight controller, a minimal drag axis based on surrounding airflow of the electric aircraft; and

sending, via the flight controller, a parking command to the at least one set of a plurality of propulsors to move the at least one set of a plurality of propulsors into a parked position aligned with the minimal drag axis.

11. The method of claim 10 , further comprising moving, via at least a first set of inverters, at least one propulsor of the at least one set of propulsors into a parked position.

12. The method of claim 11 , wherein the at least first set of inverters is configured to apply a torque to the at least one propulsor in the at least one set of a plurality of propulsors.

13. The method of claim 11 , further comprising a second set of inverters.

14. The method of claim 13 , wherein the second set of inverters is configured to hold at least one propulsor of the at least one set of a plurality of propulsors in a fixed position.

15. The system of claim 10 , wherein the at least one set of a plurality of propulsors is aligned with the minimal drag axis of a direction of airflow.

16. The system of claim 10 , wherein the at least one set of a plurality of propulsors is aligned with the longitudinal axis of the electric aircraft.

17. The system of claim 10 , wherein the at least one set of a plurality of propulsors further comprises two blades positioned opposite one another.

18. The method of claim 17 , wherein the minimal drag axis aligns along a path from one distal end of a first blade of the two blades to a second distal end of the second blade of the two blades.

19. The system of claim 1 , wherein the minimum drag axis is angularly offset from a longitudinal axis of the electric aircraft.

20. The method of claim 10 , wherein the minimum drag axis is angularly offset from a longitudinal axis of the electric aircraft.

Continuity (2)
Continuation 17362454 · Jun 29, 2021
Related Publication 20220411051A1 · Dec 29, 2022
Cited By (1)
US 12,606,301