Abstract: A hydroelectric turbine may include a stator comprising a first plurality of electricity-generating elements and a rotor comprising a second plurality of electricity-generating elements. The rotor may be disposed radially outward of an outer circumferential surface of the stator and configured to rotate around the stator about an axis of rotation. The rotor may be a flexible belt structure. The turbine may further include at least one bearing mechanism configured to support the rotor relative to the stator during rotation of the rotor around the stator.

Abstract: A hydroelectric turbine may include a stator comprising a first plurality of electricity-generating elements and a rotor comprising a second plurality of electricity-generating elements. The rotor may be disposed radially outward of an outer circumferential surface of the stator and configured to rotate around the stator about an axis of rotation. The rotor may be a flexible belt structure. The turbine may further include at least one bearing mechanism configured to support the rotor relative to the stator during rotation of the rotor around the stator.

Abstract: A system for generating electricity from fluid currents having one or more trolleys that move along a closed-loop track as a result of the action of fluid currents on one or more blades attached to each trolley. Spacing between trolleys is preferably maintained by a spacing ring to which the trolleys are attached. Optionally, one or more blades made be attached to the spacing ring. The trolleys are supported and guided either by wheels or magnetic levitation. Electrical energy is preferably created by the movement of magnets in an electrical ring attached to the trolleys with respect to a conductor connected to the track.