Multiple armature linear motor/alternator having magnetic spring with no fringe fields and increased power output
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United States of America Patent
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Nov 13, 2012
Grant Date -
May 6, 2010
app pub date -
Nov 2, 2009
filing date -
Nov 4, 2008
priority date (Note) -
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Abstract
An electromagnetic, reciprocating linear motor or alternator having at least two armatures that are adjacent along an axis of reciprocation. The armatures have gaps that are linearly aligned along a gap path parallel to the axis. Field magnets reciprocate within the gap path. The field magnets include a main field magnet associated with each armature, each main field magnet having a magnetic polarization in the same direction across the gap path. A secondary magnet provides a centering spring force and is interposed between the main magnets. The secondary magnet extends in an axial direction from within a gap of one armature core to within an adjacent gap of an adjacent armature core. The secondary magnet is magnetically polarized in a direction opposite the polarization of the main magnets.
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