Rotating electric machine, force feedback mini-joystick and related aircraft

Patent metadata

Field	Value
Publication number	US-12407231-B2
Application number	US-202217938760-A
Country	US
Kind code	B2
Filing date	Oct 7, 2022
Priority date	Oct 7, 2021
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A rotating electric machine includes a rotor and a wound stator. The wound stator has a stator shaft, wherein the stator coils are inserted in the rotor, and the stator shaft is inserted in the center of the rotor. At least one angular position sensor of the rotor is inserted in the center of the space delimited by the stator shaft and the rotor.

First claim

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A rotating electric machine comprising:
a rotor; and
a wound stator including a stator shaft and stator coils, the stator coils being inserted in the rotor and the stator shaft being inserted in a center of the rotor,
wherein at least one angular position sensor of the rotor is inserted in a center of a space delimited by the stator shaft and the rotor, and in a center of a space delimited by the stator coils.

2. The electric machine according to claim 1 , wherein the stator further includes a toroid, wherein stator coils are wound around the toroid.

3. The electric machine according to claim 2 , wherein the toroid comprises two half-toroids, coils of each half-toroid being powered by a different power system.

4. The machine according to claim 1 , wherein the angular position sensor comprises a variable reluctance resolver comprising sets of control coils each including a field coil, a sine coil and a cosine coil arranged on the stator shaft and an elliptical magnetic flux guide arranged on the rotor, the control coils and the magnetic flux guide being separated by an air-gap.

5. The machine according to claim 1 , wherein the angular position sensor comprises an elliptical permanent magnet arranged on the rotor, and means for measuring a variation of a magnetic field in two perpendicular directions arranged on the stator shaft, the magnet and the measuring means being separated by an air-gap.

6. The machine according to claim 5 , wherein the measuring means include at least one Hall effect sensor.

7. The machine according to claim 1 , further comprising at least two redundant stacked angular position sensors.

8. The machine according to claim 7 , wherein a first angular position sensor includes a variable reluctance resolver comprising sets of control coils each including a field coil, a sine coil and a cosine coil arranged on the stator shaft and an elliptical magnetic flux guide arranged on the rotor, the control coils and the magnetic flux guide being separated by an air-gap, and the second angular position sensor comprises an elliptical permanent magnet arranged on the rotor, and means for measuring a variation of a magnetic field in two perpendicular directions arranged on the stator shaft, the magnet and the measuring means being separated by an air-gap.

9. A force feedback mini-joystick for aircraft comprising a rotating electric machine according to claim 1 .

10. An aircraft including a force feedback mini-joystick according to claim 9 .

Assignees

• Safran Electronics & Defense

Inventors

• Lapôtre Blaise
• Argenton Julien
• Attrazic Yannick
• Ferraud Xavier Marcel Adolphe

Classifications

• H02K1/27

  Rotor cores with permanent magnets · CPC title

• H02K1/12

  Stationary parts of the magnetic circuit · CPC title

• B64C13/507

  with artificial feel · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• G05G2009/04766

  providing feel, e.g. indexing means, means to create counterforce · CPC title