Electricity: motive power systems – Motor structure adjustment or control
Reexamination Certificate
2006-08-29
2008-09-23
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Motor structure adjustment or control
C310S114000, C310S179000, C310S268000
Reexamination Certificate
active
07427845
ABSTRACT:
The present invention relates to a unipolar current electrical machine operable as a switched reluctance motor, comprising a motor structure and a control unit. The motor structure comprises a plurality of disk-shaped annular stator elements stacked and spaced equidistantly from each other and mounted on a frame; a plurality of disk-shaped rotor elements mounted on a rotational axis and spaced equidistantly from each other such that successive rotor elements are positioned between successive stator elements; a plurality of electrical windings on each of the stator elements, which when energized with a current flow, produce a magnetic field in a direction substantially parallel to the axis; and a return path for completing a magnetic flux path in a second direction perpendicular to the first direction on successive stator elements and through the rotor elements for generating a rotational force in the rotor elements; and a rotor position sensor. A rotor position sensor provides a signal to the control unit. The control unit utilizes an input signal in combination with the rotor position signal to switch current to each of the windings of the stator elements in a controlled manner.
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E. I. du Pont de Nemours and Company
Ro Bentsu
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