Kinetic energy harvesting devices are disclosed including, but not limited to, portable and stationary devices that generate electricity from motion resulting from any type of movement including human movement, movement of traveling vehicles, gravitational movement, and movement resulting from stored spring energy. The kinetic energy harvesting devices can be used for charging batteries and powering devices such as personal electronic devices and electric vehicles.

An optical module and a projector including the optical module are provided. The optical module includes a base, a first frame body disposed in the base, an optical element disposed in the first frame body, and at least one driving assembly disposed between the base and the first frame body. The first frame body is configured to swing relative to the base through a magnetic force generated by the at least one driving assembly, and each of the at least one driving assembly includes a coil and a magnetic structure that is separated from the coil and includes a magnetic permeable plate, a separation medium, and a magnet element. The separation medium is located on one side of the magnetic permeable plate facing the coil. The magnet element is disposed on the side of the magnetic permeable plate facing the coil and is separated by the separation medium.

An optical module and a projector including the optical module are provided. The optical module includes a base, a first frame body disposed in the base, an optical element disposed in the first frame body, and at least one driving assembly disposed between the base and the first frame body. The first frame body is configured to swing relative to the base through a magnetic force generated by the at least one driving assembly, and each of the at least one driving assembly includes a coil and a magnetic structure that is separated from the coil and includes a magnetic permeable plate, a separation medium, and a magnet element. The separation medium is located on one side of the magnetic permeable plate facing the coil. The magnet element is disposed on the side of the magnetic permeable plate facing the coil and is separated by the separation medium.

Kinetic energy harvesting methods and devices are disclosed. A portable kinetic energy harvesting device includes a housing with a plurality of magnets fixed at spaced-apart locations in the housing. A wire coil is movably positioned in the housing for reciprocating movement past the magnets. The reciprocating movement of the wire coil through magnetic fields of the magnets generates an alternating current in the wire coil. A circuit electrically connected to the wire coil includes a rectifier to convert the alternating current generated by the wire coil into direct current. The device can be used to charge batteries including, e.g., batteries for powering portable electronic devices.

Kinetic energy harvesting methods and devices are disclosed. A portable kinetic energy harvesting device includes a housing with a plurality of magnets fixed at spaced-apart locations in the housing. A wire coil is movably positioned in the housing for reciprocating movement past the magnets. The reciprocating movement of the wire coil through magnetic fields of the magnets generates an alternating current in the wire coil. A circuit electrically connected to the wire coil includes a rectifier to convert the alternating current generated by the wire coil into direct current. The device can be used to charge batteries including, e.g., batteries for powering portable electronic devices.

A pumping system utilizes a linear actuator to move a shaft attached to two pistons within cylinders to pump a working fluid. A housing is designed with coolant passageways and one-way valves such that movement of the shaft also pumps coolant past cooling fins and over a motor. The shaft is formed of several sections joined by couplers which slide within a bore of the housing. The couplers have a non-round shape and the bore has a complimentary non-round cross section such that rotation of the shaft is prevented.

An energy harvesting device for generating electrical power from low-frequency oscillations includes a high-frequency cantilever, a plurality of low-frequency cantilevers each configured to contact the high-frequency cantilever in response to environmental vibrations having a frequency within a near-resonance frequency range associated with said low-frequency cantilever, an a generator that produces electrical power in response to contact between at least one of the plurality of low-frequency cantilevers and the high-frequency cantilever. The energy harvesting device may also include an impact mass coupled to a free end of each of the plurality of low-frequency cantilevers. Some aspects may include a common base to which the high-frequency cantilever and the plurality of low-frequency cantilevers are coupled. Other aspects may include the generator comprising one or more of an induction coil and magnet, a variable distance capacitor, or a piezo-electric material.

An energy harvesting device for generating electrical power from low-frequency oscillations includes a high-frequency cantilever, a plurality of low-frequency cantilevers each configured to contact the high-frequency cantilever in response to environmental vibrations having a frequency within a near-resonance frequency range associated with said low-frequency cantilever, an a generator that produces electrical power in response to contact between at least one of the plurality of low-frequency cantilevers and the high-frequency cantilever. The energy harvesting device may also include an impact mass coupled to a free end of each of the plurality of low-frequency cantilevers. Some aspects may include a common base to which the high-frequency cantilever and the plurality of low-frequency cantilevers are coupled. Other aspects may include the generator comprising one or more of an induction coil and magnet, a variable distance capacitor, or a piezo-electric material.

Kinetic energy harvesting methods and devices are disclosed. A portable kinetic energy harvesting device includes a housing with a plurality of magnets fixed at spaced-apart locations in the housing. A wire coil is movably positioned in the housing for reciprocating movement past the magnets. The reciprocating movement of the wire coil through magnetic fields of the magnets generates an alternating current in the wire coil. A circuit electrically connected to the wire coil includes a rectifier to convert the alternating current generated by the wire coil into direct current. The device can be used to charge batteries including, e.g., batteries for powering portable electronic devices.

Kinetic energy harvesting methods and devices are disclosed. A portable kinetic energy harvesting device includes a housing with a plurality of magnets fixed at spaced-apart locations in the housing. A wire coil is movably positioned in the housing for reciprocating movement past the magnets. The reciprocating movement of the wire coil through magnetic fields of the magnets generates an alternating current in the wire coil. A circuit electrically connected to the wire coil includes a rectifier to convert the alternating current generated by the wire coil into direct current. The device can be used to charge batteries including, e.g., batteries for powering portable electronic devices.