A power generator including: a vibration system configured to be attached to a vibrating member; and a power generating element attached to the vibration system. The vibration system is a multiple-degree-of-freedom vibration system that includes a first vibration system having a first mass member elastically supported by a first spring member, and a second vibration system having a second mass member elastically connected to the first mass member by a second spring member. The power generating element is arranged between the first and second mass members, and vibration applied from the vibrating member causes relative displacement of the first and second mass members so that vibration energy of the vibrating member is input to the power generating element. A natural frequency of the first vibration system is different from that of the second vibration system.

A vibration power generator includes a vibration system attached to a vibrating member. The vibration system includes a first vibration subsystem, and a second vibration subsystem attached to the first vibration subsystem. The first vibration subsystem includes an elastic member attached to the vibrating member, and a first mass member attached to the elastic member. The second vibration subsystem includes a plate spring integral with a piezoelectric element, and a second mass member attached to the plate spring. The first vibration subsystem has a resonant frequency that is substantially equal to a resonant frequency of the second vibration subsystem.

The present invention relates to an energy harvester device comprising an elongate resonator beam comprising a piezoelectric material, the resonator beam extending between first and second ends; a base connected to the resonator beam at the first end with the second end being freely extending from the base as a cantilever; a mass attached to the second end of the resonator beam; a package surrounding at least a portion of the second end of the resonator beam; and a compliant stopper connected to the package, where the stopper is configured to stabilize motion of the cantilever to prevent breakage. Also disclosed is a system, a method of powering an electrically powered apparatus, and methods of producing an energy harvester device.

An apparatus for charging a mobile terminal includes an energy harvesting device provided in shoes and generating energy generated by a movement of a human body, a charge control module attached to trousers and controlling charging of a mobile terminal using energy harvested by the energy harvesting device, and a resonant coil module wirelessly transmitting energy harvested by the energy harvesting device to the charge control module, wherein the resonant coil module includes a transmission resonant coil unit provided in the shoes and a reception resonant coil unit provided in the trousers, spaced apart from the transmission resonant coil unit by a predetermined distance, and magnetically coupled to the transmission resonant coil unit.

An energy harvesting cantilever formed from multiple curved sections, with each curved section wrapped within the prior curved section but in an opposing direction, is the proposed solution to the problems described above. Such an energy harvesting cantilever favors bending over torsion, can be manufactured at a small scale, and will generate useful electrical energy with low frequency inputs.

A vibrational multi-morph piezoelectric energy harvester includes a composite shim having a parallelepiped form with a thickness dimension made smaller than width and length dimensions, and having a stiffness shifting from one extremity to the other extremity to minimize mechanical constraints developed at a clamping area; a seismic mass mounted at an end opposite to the clamping area to mechanically match the system to the surrounding vibration resonance; one or more piezoelectric layers laminated on said composite shim; and electrodes plated onto the one or more piezoelectric layers for connection to an electronic harvesting circuit, a battery, or a super capacitor.

The module comprises a pendular unit with an elastically deformable piezoelectric beam having a clamped end and an opposite, free end, coupled to an inertial mass. The beam produces an oscillating electrical signal collected by electrodes, which is rectified and regulated to output a voltage for charging a battery. The number and configuration of the electrodes (T1, T2, B1, B2, N) carried by the piezoelectric beam define a plurality of pairs of electrodes between which a corresponding plurality of said oscillating signals can be simultaneously collected. A switching matrix, as a function of an input command, selectively switches the plurality of pairs of electrodes between each other according to a plurality of different series (S), parallel (P) and/or series-parallel (SP) configurations, the selected configuration being that which maximizes the power sent to the battery as a function of the voltage level (VBAT) present at the terminals of the latter.

A device for recovering or dampening vibratory energy from a mechanical resonator, comprising: an electrical generator comprising an element for converting mechanical vibration energy into electrical charges coupled to the resonator, the electrical generator periodically transferring a portion of the electrical charges from one terminal of the conversion element to the other; a frequency variation to phase variation conversion device, comprising an injection-locked oscillator of which the free-running oscillation frequency is equal to the resonance frequency of the resonator, and supplying to the electrical generator a control signal of frequency equal to that of the signal outputted by the conversion element and of which the phase shift depends on the difference between the frequency of the signal outputted by the conversion element and the resonance frequency of the resonator.

A power generating element according to the present invention includes: a support frame formed in a frame shape in plan view; a vibrating body provided inside the support frame; a first bridge portion and a second bridge portion that supports the vibrating body on the support frame; and a charge generating element to generate a charge at the time of displacement of the vibrating body. The support frame includes a first frame portion arranged on a first side with respect to the vibrating body and includes a second frame portion arranged on a second side opposite to the first side with respect to the vibrating body. The first bridge portion couples the vibrating body with the first frame portion. The second bridge portion couples the vibrating body with the second frame portion.

The implant comprises a tubular body housing an energy harvesting module adapted to convert external stresses applied to the implant into electrical energy, by means of an inertial pendular unit comprising an elastically deformable element coupled to an inertial mass, as well as a rechargeable battery adapted to be recharged by the energy harvesting module, the battery being previously charged at an initial charge level. The accessory comprises an external source of electrical energy for the temporary storage of an electrical energy during the transportation and storage of the implant, the external source being physically separated from the implant. A temporary electrical coupling link from the external source to the implant rechargeable battery ensures a power supply of the rechargeable battery by the external source and hence maintains, during the whole transportation and storage duration before implantation, a battery charge level higher than a minimum predetermined level. A protection support wedges the implant with respect to the accessory while ensuring the electrical coupling of the implant to the external source, thanks to a shock-absorbing structure and vibration-filtering structure, with a texture of elastically deformable strands or slats, wrapping and wedging the implant in position inside the protection support.