摘要:
A stator or a rotor for use in an electrical machine comprises a composite element having a rigid mass suitable for including at least one magnetostrictive electrode bar, at least one magnetostrictive electrode bar, and a piezoelectric material in between the rigid mass material and the magnetostrictive electrode bars. The rigid mass, the magnetostrictive electrode bars and the piezoelectric material are arranged such that applying a voltage between the rigid mass and one or more magnetostrictive electrodes, causes piezoelectric effects in the piezoelectric material inducing stress in the bi-axial plane of the at least one magnetostrictive bar and an altered permeability of the at least one magnetostrictive bar in a direction perpendicular to the bi-axial stress plane.
摘要:
There is provided a sapphire structure with a metal body including a sapphire structure that includes a flat surface and is provided with a concave portion on the flat surface; and a metal body that is disposed in the concave portion and bonded to an inner surface of the concave portion, in which the metal body includes a surface portion that is substantially with the flat surface.
摘要:
The invention relates to a converter for converting a variation in energy to be recovered, said converter comprising: a transducer layer (52) extending essentially parallel to a reference plane and capable of transforming the variation in the energy to be recovered into a mechanical deformation, said transducer layer comprising the following elements for this purpose, namely a plurality of first blocks (70-73) made from a magnetostrictive or shape-memory material, said first blocks being delimited in relation to one another by side edges, and regions (76-79) that do not contain the material of the first block, said regions being inserted between the side edges of the first blocks; and a piezoelectric layer secured to the transducer layer. Each of the first blocks (70-73) has a preferential axis of deformation parallel to the reference plane.
摘要:
An energy harvester having a mass element which is moveable along a line of vibration, housing and a spring for transferring external mechanical disturbances from the housing to the mass element. The mass element and the housing are each provided with respective plurality of permanent magnets configured to cooperate to generate a plurality of magnetic forces. The magnetic forces collectively cancel each other and therefore allow the mass element to move along the line of vibration.
摘要:
The invention relates to an energy recovery system comprising: a circuit (222) for collecting an excess of electric charges at a first connection terminal, said circuit being equipped with a first controllable mechanical switch (236); and a device for controlling the first switch, said device comprising a transducer (230) which, without consuming the excess electric charge at the first connection terminal, can directly transform the variation in the energy to be recovered into a mechanical deformation that moves the first switch from the open position to the closed position.
摘要:
A MEMS microphone. The MEMS microphone includes a back plate, a membrane, a support structure, a substrate, and an overtravel stop. The membrane is coupled to the back plate. The support structure includes a support structure opening and a first side of the support structure is coupled to a second side of the back plate. The substrate includes a substrate opening and a first side of the substrate is coupled to a second side of the support structure. The overtravel stop limits a movement of the membrane away from the back plate and includes at least one of an overtravel stop structure coupled to the substrate, an overtravel stop structure formed as part of a carrier chip, and an overtravel stop structure formed as part of the support structure in the support structure opening.
摘要:
The present invention relates to a magnetic actuation method according to which a magnetised mobile (4) is directed by means of at least one magnetic element (2, 2a, 2b) placed opposite said magnetised mobile, characterised in that the preferred direction (or easy axis) of magnetisation is made to turn at every point of said element by applying at least one mechanical constraint to said magnetic element(s) (2, 2, 2b), causing anisotropy within said element and thus moving the magnetised mobile in a preferred linear direction or causing the same to rotate.