Variable magnetic gears
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United States of America Patent
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Apr 21, 2015
Grant Date -
Feb 17, 2011
app pub date -
Feb 20, 2009
filing date -
Feb 21, 2008
priority date (Note) -
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Abstract
A magnetic gear comprising: a first movable member having a first set of magnetic poles, a second movable member having a second set of magnetic poles, and a third movable member having a set of pole pieces; wherein the first and second members have magnetic poles at different spacings and the pole pieces are arranged to modulate the magnetic field acting between the magnetic poles, and control means arranged to control rotation of one of the members so as to vary the gear ratio between the other two members.
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