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1. (WO2018122371) ROTOR FOR AN AIRCRAFT CAPABLE OF HOVERING AND RELATIVE METHOD

Pub. No.:    WO/2018/122371    International Application No.:    PCT/EP2017/084806
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Sat Dec 30 00:59:59 CET 2017
IPC: B64C 27/12
B64C 27/68
B64C 27/605
H02K 16/02
Applicants: LEONARDO S.P.A.
Inventors: BRUNETTI, Massimo
Title: ROTOR FOR AN AIRCRAFT CAPABLE OF HOVERING AND RELATIVE METHOD
Abstract:
There is disclosed a rotor (3, 4, 4', 4'') for an aircraft (1) capable of hovering, comprising: a stator (10, 150); a rotatable element (11, 151), which is rotatable about an axis (A, B) with respect to stator (10, 150); a blade (13; 154), which is connected with element (11, 151); a support element (36; 161), which supports a source (30) of a magnetic field (BS) and is either stationary or driven in rotation at a first rotational speed (ω1); and a first electric circuit (32, 169), which is angularly integral with element (11, 151) and can be driven in rotation at a second rotational speed (ω2) different from first rotational speed (ω1); first electric circuit (32, 169) being electromagnetically coupled with source (30, 163), so that an electromotive force (emfR) is magnetically induced in first electric circuit (32, 169) and an first electric current (iR) flows in first electric circuit (32, 169); rotor (3, 4, 4', 4'') further comprises a second electric circuit (65; 65 70; 90) which is either stationary or driven in rotation at a first rotational speed (ω1), and a sensor (58) generating a signal (Vc) associated to a back electromotive force (bemfC, bemfS) induced on second electric circuit (65; 70; 90).