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US 11,056,955 B2Granted
Aircraft turbine with counter-rotating propellers
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorsMatthias Dorfner, Korbinian König-Petermaier
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Abstract
The invention relates to an aircraft turbine having counter-rotating propellers and a primary drive, the noise development of which is significantly reduced with respect to aircraft turbines which have a primary drive based on the internal combustion principle. The invention relates to an aircraft turbine having counter-rotating propellers and a primary drive, the primary drive of which is based on the electric drive principle.
Claims6
An aircraft turbine comprising:
- counter-rotating propellers;
- and a primary drive;
- wherein the primary drive uses an electric drive principle,
- wherein the primary drive is configured as a rotationally symmetrical synchronous motor comprising a stator, a first rotor, and a second rotor,
- wherein the stator includes a first double layer tooth coil winding having a first number of poles,
- wherein the first rotor includes a second double layer tooth coil winding having a second number of poles for a first propeller of the counter-rotating propellers,
- wherein the second rotor includes a third double layer tooth coil winding having a third number of poles for a second propeller of the counter-rotating propellers, and
- wherein the second number of poles of the second double layer tooth coil winding is different than the third number of poles of the third double layer tooth coil winding, such that the primary drive is configured to form an electric loading with multiple dominant harmonics.
5 more elements
Dependencies are inferred from the claim text.