ELECTRIC DRIVE DEVICE FOR AN AIRCRAFT
The invention relates to an electric drive ( 1 ) for an aircraft, especially for a helicopter ( 20 ) comprising at least one rotor ( 23 ) that is directly driven by a dynamoelectric machine ( 2 ). The dynamoelectric machine ( 2 ) is embodied in a duplex arrangement, a rotor ( 6 ) arranged in an air gap ( 12 ) comprising permanent magnets ( 13 ) on a carrier device ( 14 ), and the stators ( 4, 5 ) of the dynamoelectric machine ( 2 ) and/or the rotor ( 6 ) comprising coolant. A planetary gear ( 3 ) is especially provided between the driven rotor and the dynamoelectric machine ( 2 ), preferably in the axial extension of the dynamoelectric machine ( 2 ).
1 .- 8 . (canceled)
9 . An electric drive for an aircraft, comprising:
a dynamoelectric machine constructed in the form of a duplex arrangement and including a stator assembly demarcating an air gap, a rotor located in the air gap, and permanent magnets mounted to a carrier facility of the rotor, at least one of the stator assembly and the rotor being constructed for cooling thereof;
at least one rotor assembly driven directly by the dynamoelectric machine;
a planetary gear arranged between the rotor assembly and the dynamoelectric machine;
a common housing accommodating the dynamoelectric machine and the planetary gear; and
a common bearing disposed between the dynamoelectric machine and the planetary gear.
10 . The electric drive of claim 9 , wherein the aircraft is a helicopter.
11 . The electric drive of claim 9 , wherein the planetary gear is arranged in an axial extension of the dynamoelectric machine.
12 . The electric drive of claim 9 , wherein the carrier facility of the rotor comprises at least one member selected from the group consisting of soft iron and aramid.
13 . The electric drive of claim 9 , wherein the carrier facility of the rotor has a multipart construction.
14 . The electric drive of claim 9 , wherein the stator assembly has at least one stator having an oil circuit for cooling.
15 . The electric drive of claim 14 , wherein the stator assembly includes a winding, said oil circuit being configured to provide cooling of at least the winding of the stator assembly.
16 . The electric drive of claim 14 , wherein the oil circuit is configured to provide cooling of the at least one stator and the planetary gear.