Rotary electrical machine including pole pieces and permanent magnets
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United States of America Patent
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Mar 22, 2011
Grant Date -
Jan 8, 2009
app pub date -
Dec 26, 2006
filing date -
Jan 3, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a rotary electrical machine comprising: at least one stator; and at least one rotor; the rotor having an axis of rotation and co-operating with the stator to define at least one airgap, the rotor comprising permanent magnets and pole pieces between the magnets; at least one pole piece being associated with one or more permanent magnets to concentrate the magnetic flux from said magnet(s); and said magnet(s) defining at least three different directions of magnetization, the resultant flux in the pole piece towards the stator being non-coplanar with at least two of the directions of magnetization.
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