Leonardo S.p.a.

Lucchi R. Elettromeccanica Srl

Gm Global Technolgoy Operations, Inc.

Giorgio Lucchi

Luigi Maria Bottasso

James Wang

Luca Medici

Massimo Brunetti

Antonio Zocchi

Khwaja M Rahman

James Michio Nagashima

Terence G Ward

Fabio Crescimbini

Federico Caricchi

Luigi Bottasso

A rotor for an aircraft capable of hovering includes a stationary support structure and a rotative element, which is rotatable about a first axis with respect to said stationary support structure with a first rotational speed. The rotor includes at least one blade, which is operatively connected with said rotative element; and a transmission group, which includes an output element rotatable about first axis with a second rotational speed different from first rotational speed.

Transmission for rotor for an aircraft capable of hovering

A rotor for an aircraft capable of hovering includes a stationary support structure and a rotative element which is rotatable about an axis with respect to the stationary support structure. The rotor has at least one blade, which is operatively connected with a rotative element. The rotor has a source of a magnetic field, which is either stationary or driven in rotation at a first rotational speed and an electric conductive element, which is operatively connected to the rotative element and can be driven in rotation at a second rotational speed different from first rotational speed. An electric conductive element is electromagnetically coupled so that an electromotive force is magnetically induced in electric conductive element itself Two rings extend radially inward from a tubular body of the rotor hub with the first ring connected to a plurality of thermally conductive rings of a flow deflector at an axial end of the rotor and the second ring supports the electric conductive element.

Rotor for an aircraft capable of hovering

A containing casing for a stator of an electric machine defines, around said axis, a compartment to house the stator. A first radially inner part and a second radially outer part are coupled to one another and define together at least one duct surrounding the axis for the passage of a cooling fluid. Said duct comprises, in turn, a plurality of first sections and a plurality of second sections, which are distributed around the axis alternated with one another. The first sections are arranged around the axis with an arrangement that supports the motion of the fluid around the axis. The second sections are transverse to the first sections and at least partially obtained inside respective protuberances of the first radially inner part, which project towards the inside of the compartment. A space for the insertion of radially projecting portions of electric windings of the stator is defined between two consecutive protuberances around the axis.

Containing casing for a stator of an electric machine and stator assembly using said casing

An axial-flux electric machine with a winding rotor comprises a stator section and a rotor section, both developing around and axis. The rotor section comprises a rotor, which, in turn, comprises a toroidal rotor core made of a ferromagnetic material and a plurality of windings and of teeth, which are angularly distributed on the rotor core in an alternated configuration. The teeth have, on at least one lateral surface of theirs, a shaped profile defining at least one holding surface, which is such as to cooperate with a resin matrix, which is suited to steadily lock the teeth on the rotor core.

Axial-flux electric machine with winding rotor and method for the production thereof

Methods and apparatus are provided for an axial electric motor. The apparatus comprises, a stator having coils thereon for producing a magnetic field, a rotor rotated by the magnetic field, an output shaft coupled to the rotor, and a ring incorporating a coolant channel circumferentially engaging the stator for absorbing heat and reaction torque from the stator. It is preferable that that the ring have inwardly extending teeth that mesh with the coils on the stator. The space between the teeth and the coils is preferably filled with a substantially solid thermally conductive material to transmit stator reaction torque to the teeth and cool the stator. The coils are preferably formed from a flat ribbon a portion of whose principal surface is perpendicular to the teeth. A supporting frame is desirably fixedly coupled to the ring and rotatably coupled to the output shaft.

Cooling and handling of reaction torque for an axial flux motor

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Rimini, Italy

Giorgio Lucchi