The multi-piston bladeless wind turbine creates electrical energy using hydraulically connected pistons. The system may include a disk, a small piston in fluid communication with a large piston, and a crankshaft attached to the large piston. The disk transfers forces from the wind to the small piston. Hydraulic fluid then transfers the forces to the larger piston. When the disk and associated small piston have been forced to the end of their stroke by the wind, a gate in the disk is opened to reduce wind force on the disk by allowing air to travel through the disk. Subsequently, the disk and associated small piston are pushed back to the beginning of the stroke by the pressure created by the large piston's weight. This process is repeated by closing the gate in the disk. A crankshaft powering an electric generator is turned by the movement of the large piston.

An autonomous implantable capsule comprises a capsule body provided with an element for its anchoring to a patient's organ. An electronic unit is powered by an energy harvesting module provided with a pendular unit comprising an inertial mass coupled to an elastic piezoelectric beam forming a mechanical-electrical transducer for converting into electrical energy the oscillations of the beam. A mobile support, integral with the clamped end of the beam and mobile in axial rotation about the axis of the capsule body, can be directed by a controllable driver to adjust the angular position of the support so as to maximize the produced electrical power converted by the mechanical-electrical transducer.

A bladeless wind turbine may include a flexible support rod mounted on a support surface, an elongated rigid mast mounted on the flexible support rod, and a natural tuning mechanism coaxially mounted around a first portion of the flexible support rod. A natural tuning mechanism may include a housing coaxially attached to the flexible support rod, at least one extendable tube slidably housed within the housing and coaxially mounted and fitted around the flexible support rod. At least one extendable tube may be slidably moveable along the main axis of the flexible support rod and may be extendable beyond the top end of the housing by a predetermined height. A bladeless wind turbine may further include a control unit that may be coupled to the natural tuning mechanism and may be configured to urge the at least one extendable tube to extend beyond the top end of the housing by a predetermined height, where the predetermined height may be calculated by the control unit based on the wind and the elongated rigid mast.

An electrical power generator includes a first part configured to be located in a fluid such that, when the fluid moves, it generates vortices in the fluid so that a lift force is generated on the first part, which produces an oscillating movement of the first part, which has an amplitude. The natural oscillation frequency of the first part may be adjusted to wind speed by way of magnets, which repel each other. Magnets may also be used to generate electrical currents in coils. The first part can have a diameter that increases with distance above the base of the generator.

A cochlear implant device is disclosed, comprising an inductive antenna, a stimulation unit, an electrode array, and an energy harvesting apparatus. The inductive antenna is configured to receive energy to operate the cochlear implant and to receive signals for a stimulation of a cochlea via an electrode array comprising a plurality of electrodes. The stimulation unit is configured to process the signals received by the inductive antenna to be usable for the electrodes of the electrode array. The electrode array is configured to apply the signals processed by the stimulation unit to the cochlea for the stimulation thereof. The energy harvesting apparatus is connected to the stimulation unit or to the electrode array, and is configured to harvest energy based on at least one of thermal, biochemical, biophysical, and mechanical processes/phenomena pertaining to the cochlea, and is configured to provide harvested energy to the stimulation unit or the electrode array, respectively.

Power generators that incorporate porous electric generation layers composed of mechanoradical-forming polymers are provided. Also provided are methods for using the generators to convert mechanical energy into and electrical signal to power electronic devices. The porous electric generation material includes an organic polymer that forms free radicals when covalent bonds are homolytically ruptured upon the application of a compressive force to the porous structure.

A device, system and method for harvesting electrical power from hydraulic fluid of a hydraulic system determines at least one of hydraulic fluid flow or hydraulic fluid pressure in the hydraulic system. Based on rules and the determined at least one of the hydraulic fluid flow or hydraulic fluid pressure, an expected conversion efficiency of the power conversion device and an expected rectified power to be generated from the received input power by the power conversion device are determined. From the expected rectified power a potential conversion efficiency of the power conversion device is determined, and the power conversion device is commanded to produce the expected rectified power when the potential conversion efficiency is greater than or equal to the expected conversion efficiency. When the potential conversion efficiency is less than the expected conversion efficiency, the rules are updated.

The bluff body attaches to an elastic mount and is capable of generate vortex shedding when the elastic mount orients the bluff body in a flow-line traverse to a fluid flow and vibrates in response to the vortex shedding. A harvester is located within the bluff body and is capable of generating power above a specified threshold in response to the vibration.

The bluff body attaches to an elastic mount and is capable of generate vortex shedding when the elastic mount orients the bluff body in a flow-line traverse to a fluid flow and vibrates in response to the vortex shedding. A harvester is located within the bluff body and is capable of generating power above a specified threshold in response to the vibration.

The bluff body attaches to an elastic mount and is capable of generate vortex shedding when the elastic mount orients the bluff body in a flow-line traverse to a fluid flow and vibrates in response to the vortex shedding. A harvester is located within the bluff body and is capable of generating power above a specified threshold in response to the vibration.