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US 2015/0084443 A1Published application
High energy density vibration energy harvesting device with high-mu material
AssigneeNortheastern University
InventorNian-Xiang SUN
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AssigneeNortheastern University
InventorNian-Xiang SUN
Estimating the term…
The present disclosure describes a vibration energy harvester with increased output power density. The vibration energy harvester has two magnetic solenoids, each with cores that include multiple layers of high permeability materials. The two magnetic solenoids are fixed at two sides of a movably supported hard magnetic core, such as a magnet pair with anti-parallel magnetization, which produces a spatially inhomogeneous bias magnetic field for switching the flux inside the solenoids during vibration of the magnetic core. An output voltage of 2.52 V and a power density 20.84 mW/cm3 at 42 Hz, with a half peak working bandwidth of 6 Hz.
An energy harvesting device, comprising:
In an energy harvesting device, comprising (1) a first and second solenoid, each solenoid comprising (a) a wire coil wrapped around (b) a high permeability core with two or more layers, and the first and second solenoid being disposed along a first path, and (2) a magnetic core disposed between the first and second solenoid such that the first solenoid is mounted on a first side of the first magnet, and the second solenoid is mounted on a second side of the first magnet, the magnetic core being mounted on a support such that the magnetic core can vibrate along a second path that is orthogonal to the first path, a method comprising:
Dependencies are inferred from the claim text.