Centrifugal-effect vibration generator having coaxial contrarotating rotors
AssigneeEurocopter
InventorSylvain Clary
Life of this patent
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Abstract
A device for generating forces that are variable and controllable in amplitude, in direction, and in frequency, the device includes two unbalanced rotors (18, 20, 35 to 38) mounted coaxially in a casing (11). The device further includes electromagnetic drive elements for driving a first of the two rotors in rotation relative to the second of the two rotors, and brake elements (43 to 45) for braking the second rotor (20, 36, 38) relative to the casing.
Claims21
A device (10) for generating forces that are variable and controllable in frequency and in amplitude, and possibly in direction, the device comprising two unbalanced rotors (18, 20, 35 to 38) mounted coaxially in a casing (11), and further comprising electromagnetic drive means for driving a first of the two rotors in rotation from the second of the two rotors such that the rotors rotate in opposite directions, together with brake means (43 to 45) for braking the second rotor (20, 36, 38) relative to the casing, and means for controlling the speed of the rotors in order to maintain their absolute speeds substantially identical.
A force generator device comprising two coaxial unbalanced rotors mounted in a casing, a first of the two rotors having a magnetic first circuit, and a second of the two rotors having an electromagnetic second circuit provided and arranged to co-operate with the magnetic first circuit and to drive the first rotor in rotation about the common axis of the rotors relative to the second rotor when the electromagnetic second circuit is powered, the device further comprising second-rotor brake means for braking the rotation of the second rotor relative to the casing, brake control means for controlling the speed and the phase of the rotation of the second rotor relative to the casing, and drive control means for controlling the speed and the phase of rotation of the first rotor relative to the second rotor or relative to the casing.
Dependencies are inferred from the claim text.