07498681 is referenced by 34 patents and cites 34 patents.

Electromechanical devices that generate an electrical signal in response to an external source of mechanical vibrations can operate as a sensor of vibrations and as an energy harvester for converting mechanical vibration to electrical energy. The devices incorporate a magnet that is movable through a gap in a ferromagnetic circuit, wherein a coil is wound around a portion of the ferromagnetic circuit. A flexible coupling is used to attach the magnet to a frame for providing alignment of the magnet as it moves or oscillates through the gap in the ferromagnetic circuit. The motion of the magnet can be constrained to occur within a substantially linear range of magnetostatic force that develops due to the motion of the magnet. The devices can have ferromagnetic circuits with multiple arms, an array of magnets having alternating polarity and, encompass micro-electromechanical (MEM) devices.

Title
Mechanical vibration to electrical energy converter
Application Number
11/688981
Publication Number
7498681 (B1)
Application Date
March 21, 2007
Publication Date
March 3, 2009
Inventor
Jay Kristoffer Brotz
Albuquerque
NM, US
Rick Allen Kellogg
Tijeras
NM, US
Agent
William R Conley
Assignee
Sandia Corporation
NM, US
IPC
H02K 35/00
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