Abstract: The wheel device including a shaft, a reversible rotary electrical machine mounted coaxially about the shaft, an energy storage device coupled to the electrical machine, an electronic control unit for controlling the electrical machine and the energy storage device according to predetermined methods, and solar energy converters connected to at least one lateral portion of the wheel to convert the incident solar energy into electrical energy, and connectable to the energy storage device.

Abstract: The wheel comprises: a shaft adapted to be secured to a bearing structure of the vehicle and about which the wheel is mounted to rotate, a reversible rotary electrical machine mounted coaxially about the shaft and adapted selectively to act as an electrical generator and as an electric motor actuating the wheel, energy storage devices which may be coupled to the electrical machine, an electronic control unit adapted to control the electrical machine and the energy storage means according to predetermined methods, and solar energy converters connected to at least one lateral portion of the wheel and adapted to convert the incident solar energy into electrical energy, and which may be coupled to the energy storage means. The energy storage devices comprise at least one substantially planar or film rechargeable battery applied to at least one lateral portion of the wheel and rotating rigidly with this wheel.