A device for generating electrical energy from mechanical motion includes a surface float and at least one force modifier disposed at least partially within the interior of the surface float, the force modifier to receive an input force at a pumping cylinder and apply a modified force to a generator through a driving cylinder. The pumping cylinder or the driving cylinder is a tandem cylinder.

A vibration power generation device that further improves power generation efficiency includes a vibration exciting body in which vibration is caused by a flowing fluid, a vibrated body that is oscillatable and connected to the vibration exciting body, and a power generator to generate electricity by oscillation of the vibrated body. The vibration exciting body is in proximity to a wall surface, and vibration is caused in the vibration exciting body by a fluid flowing along the wall surface.

[Problem] To provide a magnetostrictive material, an energy converter and a method for manufacturing the energy converter, and a vibration power generator, having improved energy efficiency and capable of reducing manufacturing costs.

[Solution] A magnetostrictive material includes a void. A plate-shaped magnetostrictive material includes a through hole in a plate thickness direction. An energy converter is formed by stacking and coupling a plate-shaped magnetostrictive material including a through hole in a plate thickness direction and a plate material in plate thickness direction to each other. The plate-shaped magnetostrictive material is formed of a honeycomb structure including a cell constituting the through hole. A cross sectional shape of the cell in the honeycomb structure is polygonal. The plate material is made of a magnetostrictive material, a soft magnetic material, or a nonmagnetic material. The plate-shaped magnetostrictive material and/or the plate material may be formed of a plurality of pieces, each of which is stacked and coupled in the plate thickness direction.

The task of the present invention is to provide a magnetostrictive power generation device that is low cost and excellent in durability and can achieve a power generation amount equal to or exceeding those of conventional magnetostrictive power generation devices. The present invention provides a power-generating magnetostrictive element that is formed from a laminate comprising at least one electromagnetic steel sheet layer which comprises at least one electromagnetic steel sheet and satisfies at least one of the following Condition A and Condition B. Condition A: The at least one electromagnetic steel sheet layer comprises two or more electromagnetic sheets, and the two or more electromagnetic sheets are bonded to each other through a brazing material part. Condition B: The laminate further comprises at least one elastic material layer, and the at least one electromagnetic steel sheet layer is bonded to the elastic material layer through a brazing material part.

The disclosure describes new apparatus, systems and methods utilizing magnetoelectric neural stimulators with tunable amplitude and waveform. Specific embodiments of the present disclosure include a magnetoelectric film, a magnetic field generator and an electrical circuit coupled to the magnetoelectric film, in particular embodiments, the electrical circuit comprises components configured modify an electrical output signal produced by the magnetoelectric film. In certain embodiments, the electrical circuit is configured to modify the electric signal to charge a charge storage element, to transmit data to an implantable wireless neural stimulator, and to provide a stimulation output to electrodes.

The magnetostrictive member is formed of a single crystal of an iron-based alloy having magnetostrictive characteristics, is a plate-like body having a long-side direction and a short-side direction, and has a lattice constant of a <100> orientation in the short-side direction larger than a lattice constant of a <100> orientation in the long-side direction.

Task of the present invention is to provide a power-generating magnetostrictive element and a magnetostrictive power generation device equipped with the same, which are capable of achieving the same or a greater magnetostrictive power generation amount compared to conventional technology while employing materials lower in cost compared to conventional magnetostrictive materials. The task is achieved by providing a magnetostrictive element comprising a magnetostrictive part formed of an electromagnetic metal sheet. The present invention also provides a power-generating magnetostrictive element and a power-generating magnetostrictive element having high voltage with little variation. The task is achieved by providing a magnetostrictive element comprising a magnetostrictive part formed from a magnetostrictive material and a stress control part formed from an elastic material, the materials each having a Young's modulus and a sheet thickness simultaneously satisfying specific relationships.

The present disclosure relates to improving power output of magnetoelectric (ME) films by fine-tuning different parameters of the films. These parameters may include e.g., resonance frequency, magnetic flux collection, interface adhesion, strain enhancement and coupling coefficient that may be fine-tuned through geometric modifications such as by adjusting thickness or layering, surface area or dimensions such as height and width aspect ratio, and patterning. Other configurations of ME film design may also include incorporating additional elements such as a flux-steering element for capturing more flux, additional coils or adding a bias magnet as a strain enhancer. ME films may offer miniaturization for integration into small-scale devices due to their sensitivity to electric and magnetic field, compact size, and low power consumption.