An electromechanical transducer apparatus for converting between mechanical energy and electrical energy is disclosed and includes first and second magnetic flux generators including pole pieces coupled to direct magnetic flux. Th magnetic flux generators are disposed such that opposite polarity pole pieces are spaced apart in adjacent relation. A pair of reciprocators are coupled for reciprocating movement between the pole pieces and are spaced apart by first and second air gaps. A closing piece completes a magnetic circuit and when the reciprocators are disposed such that the first air gap is smaller than the second air gap, magnetic flux generated by the first magnetic flux generator flows in a first direction via the first air gap through the closing piece. When the reciprocators are disposed such that the second air gap is smaller than the first air gap, magnetic flux generated by the second magnetic flux generator flows in a second opposite direction via the second air gap through the closing piece. A current carrying coil is disposed to electromagnetically interact with the magnetic flux.

A smart ring is configured harvest mechanical energy using piezoelectricity. The smart ring includes a ring-shaped housing, a power source disposed within the ring-shaped housing, and a charging circuit. The charging circuit includes a piezoelectric harvesting element, and is configured to charge the power source when user motion causes a mechanical deformation in the piezoelectric harvesting element. The smart ring further includes a component, disposed within the ring-shaped housing and configured to draw energy from the power source, and further configured to perform at least one of: i) sense a physical phenomenon external to the ring-shaped housing, ii) send communication signals to a communication device external to the ring-shaped housing, or iii) implement a user interface.

The invention relates to an energy recovery device including: a)—at least one first magnet, able to be set in movement according to a rotational or translational movement; b)—a main magnet, able to be set in rotation about an axis (ZZ′) by said at least first magnet; c)—at least one second magnet, fixedly disposed with respect to the main magnet, for determining one or more position(s) of equilibrium of the latter; d)—at least one conductive coil for transforming a variation of orientation of the main magnet into electrical energy, wherein: in a 1st speed or frequency range, called low range, a coupling of said at least one first magnet and of said main magnet causes the rotation of the latter from at least one position of equilibrium, the oscillations of said main magnet around said at least one position of equilibrium resulting in the creation of an electrical energy in said at least one conductive coil; for a 2nd speed or frequency range, called mid-range, a coupling of said at least one first magnet and of said main magnet causes the rotation of the latter, without oscillations, and this rotation results in the creation of an electrical energy in the coil.

The invention relates to an energy recovery device including: a)—at least one first magnet, able to be set in movement according to a rotational or translational movement; b)—a main magnet, able to be set in rotation about an axis (ZZ′) by said at least first magnet; c)—at least one second magnet, fixedly disposed with respect to the main magnet, for determining one or more position(s) of equilibrium of the latter; d)—at least one conductive coil for transforming a variation of orientation of the main magnet into electrical energy, wherein: in a 1st speed or frequency range, called low range, a coupling of said at least one first magnet and of said main magnet causes the rotation of the latter from at least one position of equilibrium, the oscillations of said main magnet around said at least one position of equilibrium resulting in the creation of an electrical energy in said at least one conductive coil; for a 2nd speed or frequency range, called mid-range, a coupling of said at least one first magnet and of said main magnet causes the rotation of the latter, without oscillations, and this rotation results in the creation of an electrical energy in the coil.

In general, devices and systems for a tangentially actuated magnetic momentum transfer generator, and methods of use thereof, are provided. In an aspect, an electrical generator having a plurality of turns of wire forming a coil, a first magnet positioned in the coil, at least one focus magnet positioned about the coil, and an actuator movable relative to the first magnet in a direction tangential to an outer surface of the first magnet are provided. The actuator can be configured to cause rotation of the first magnet, and the rotation of the first magnet and/or an interaction of the first magnet with a magnetic field of one or more of the at least one focus magnet and the actuator magnet can induce a voltage across a first terminal end and a second terminal end of the plurality of turns of wire.

In general, devices and systems for a tangentially actuated magnetic momentum transfer generator, and methods of use thereof, are provided. In an aspect, an electrical generator having a plurality of turns of wire forming a coil, a first magnet positioned in the coil, at least one focus magnet positioned about the coil, and an actuator movable relative to the first magnet in a direction tangential to an outer surface of the first magnet are provided. The actuator can be configured to cause rotation of the first magnet, and the rotation of the first magnet and/or an interaction of the first magnet with a magnetic field of one or more of the at least one focus magnet and the actuator magnet can induce a voltage across a first terminal end and a second terminal end of the plurality of turns of wire.

An energy harvester having an electromagnet and a triboelectric nanogenerator. The triboelectric nanogenerator has triboelectric layers configured to be spaced apart by a gap width. Displacement of a magnet of the electromagnet is configured to enable the triboelectric layers to contact one another, in which the gap width is configured to be smaller than the displacement.

An energy harvester having an electromagnet and a triboelectric nanogenerator. The triboelectric nanogenerator has triboelectric layers configured to be spaced apart by a gap width. Displacement of a magnet of the electromagnet is configured to enable the triboelectric layers to contact one another, in which the gap width is configured to be smaller than the displacement.

For efficient presentation of pseudo force sense, a pseudo force sense generation apparatus includes: a base mechanism; and a contact mechanism that performs periodical asymmetric motion relative to the base mechanism and gives force based on the asymmetric motion to skin or mucous membrane with which the contact mechanism is in direct or indirect contact. A mass of the contact mechanism is smaller than a mass of the base mechanism, or the mass of the contact mechanism is smaller than a sum of the mass of the base mechanism and a mass of a mechanism that is attached to the base mechanism.

For efficient presentation of pseudo force sense, a pseudo force sense generation apparatus includes: a base mechanism; and a contact mechanism that performs periodical asymmetric motion relative to the base mechanism and gives force based on the asymmetric motion to skin or mucous membrane with which the contact mechanism is in direct or indirect contact. A mass of the contact mechanism is smaller than a mass of the base mechanism, or the mass of the contact mechanism is smaller than a sum of the mass of the base mechanism and a mass of a mechanism that is attached to the base mechanism.