An object of the invention is to provide a cheap, efficient and polyvalent energy harvesting system able to exploit several energy sources. The invention proposes an energy harvesting system (100) including a frame, at least one permanent magnet (101) having a North/South direction, and at least one winding (107, 108) wound according to a winding direction around a core (103a-103b) including a high magnetic permeability material, at least said at least one permanent magnet being mounted on the frame to be able to oscillate relatively to the winding, characterized in that the system includes a magnetic flux divider arranged between said at least one permanent magnet and said at least one winding in order to concentrate the magnetic flux at discrete positions of maximum magnetic flux then forming equilibrium positions where the winding faces one of the said discrete positions of maximum magnetic flux.

The present invention provides a power generating device, comprising the first shell, the sensor module, the second shell, the magnetic module, the cover and the elastic element. The sensor module is disposed in the first hollow portion. The second shell is disposed on the first shell. The magnetic module is disposed on the first fixture portion of the second shell. The cover is disposed on the external surface of the second shell, and the convex portion penetrates through the hole and holds the magnetic module in the first fixture portion. The elastic element is disposed between the first shell and the second shell. When the power generating device takes the external force, the second shell and the first shell do the relative movement; meanwhile, the first magnetism element of the magnetic module slides through the direction of the external force in the first slide gap and the induced current is generates on the induction coil by the change of the magnetic flux.

The present invention provides a power generating device, comprising the first shell, the sensor module, the second shell, the magnetic module, the cover and the elastic element. The sensor module is disposed in the first hollow portion. The second shell is disposed on the first shell. The magnetic module is disposed on the first fixture portion of the second shell. The cover is disposed on the external surface of the second shell, and the convex portion penetrates through the hole and holds the magnetic module in the first fixture portion. The elastic element is disposed between the first shell and the second shell. When the power generating device takes the external force, the second shell and the first shell do the relative movement; meanwhile, the first magnetism element of the magnetic module slides through the direction of the external force in the first slide gap and the induced current is generates on the induction coil by the change of the magnetic flux.

A linear generator includes a permanent magnet array having at least two magnets arranged end-to-end. A set of conductive coils is arranged around the permanent magnet array. A four-phase full wave rectifier is configured to accept alternating current inputs from the set of conductive coils and to produce one or more direct current outputs. A summing circuit is configured to aggregate the one or more direct current outputs from the rectifier to produce a combined, rectified direct current output.

A linear generator includes a permanent magnet array having at least two magnets arranged end-to-end. A set of conductive coils is arranged around the permanent magnet array. A four-phase full wave rectifier is configured to accept alternating current inputs from the set of conductive coils and to produce one or more direct current outputs. A summing circuit is configured to aggregate the one or more direct current outputs from the rectifier to produce a combined, rectified direct current output.

An electromagnetic transducer includes a magnetic assembly and a coil assembly. The magnetic assembly may include an inner magnet subassembly and an outer magnet subassembly. The inner magnet subassembly and the outer magnet subassembly each have a plurality of axial magnets arranged in a stacked configuration with a spacer disposed between vertically adjacent axial magnets. The coil assembly includes an inner coil subassembly and an outer coil subassembly. The inner coil subassembly is disposed between the inner magnet subassembly and the outer magnet subassembly, and the outer coil subassembly is disposed around the outer magnet subassembly. The coil assembly and the magnetic assembly are configured to move relative to each other.

An electromagnetic transducer includes a magnetic assembly and a coil assembly. The magnetic assembly may include an inner magnet subassembly and an outer magnet subassembly. The inner magnet subassembly and the outer magnet subassembly each have a plurality of axial magnets arranged in a stacked configuration with a spacer disposed between vertically adjacent axial magnets. The coil assembly includes an inner coil subassembly and an outer coil subassembly. The inner coil subassembly is disposed between the inner magnet subassembly and the outer magnet subassembly, and the outer coil subassembly is disposed around the outer magnet subassembly. The coil assembly and the magnetic assembly are configured to move relative to each other.

An energy harvester coupled to a vibration source includes a housing, a transducer, and an amplifier. The transducer may have a first part and a second part. The first part and the second part may move relative to each other along a central axis in response to a motion from the vibration source. The amplifier is coupled to the housing and operable to amplify an amplitude of the motion received from the vibration source. The amplifier has an input member coupled to the vibration source and an output member coupled to the first part of the transducer. The input member moves at a distance D1 in response to the motion from the vibration source. The output member moves the first part of the transducer in response to the input member moving. The first part of the transducer moves along the central axis by a distance D2, where D2>D1.

An energy harvester coupled to a vibration source includes a housing, a transducer, and an amplifier. The transducer may have a first part and a second part. The first part and the second part may move relative to each other along a central axis in response to a motion from the vibration source. The amplifier is coupled to the housing and operable to amplify an amplitude of the motion received from the vibration source. The amplifier has an input member coupled to the vibration source and an output member coupled to the first part of the transducer. The input member moves at a distance D1 in response to the motion from the vibration source. The output member moves the first part of the transducer in response to the input member moving. The first part of the transducer moves along the central axis by a distance D2, where D2>D1.

A buoy includes a flotation device configured to float at surface of a body of water. A vibrational linear electric generator (VLEG) is configured to generate power from vibrational oscillations caused by waves using compressed repulsive magnetic fields focused by end magnetic field deflecting magnets. A power collection circuit, which includes a first battery, is configured to collect and store energy generated by the VLEG. One or more electronic components are powered by the vibrational linear electric generator.