Appeal No. 1998-0506
Application 08/314,994
density of magnetic energy that is stored in
the air gap in the absence of stator slots, as
a function of a linear coordinate taken along
a circumference disposed within the air gap
and coaxial to the motor axis, exhibits an
increasing transition in magnitude in a first
angular position near a first end of a
magnetic polarity and a decreasing transition
in magnitude in a second angular position near
a second end of the magnetic polarity, the
transitions being asymmetrical with respect to
each other and the density of magnet energy
being substantially constant between
consecutive transitions; and
the slots of the stator are disposed in
positions such that during operation, if a
first slot is in a first angular position
corresponding to the first angular position of
the increasing transition in magnitude of the
distribution of magnetic energy density, a
second slot is in a second angular position
that corresponds to the second angular
position of the decreasing transition in
magnitude of the distribution of magnetic
energy density, each slot functioning to
modify the distribution of the density of
magnetic energy in the air gap according to a
modulation function which has a local
development symmetrical to a radial plane
passing through the center of the slot.
The Examiner relies on the following prior art:
De Filippis 5,233,250 August 3, 1993
Claim 1 stands rejected under 35 U.S.C. § 102(b) as
being unpatentable over De Filippis.
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