Patent ID: 6720686
Filing Date: 2004-04-13
Classification: H02K

Abstract:
A switched reluctance machine, comprising:a rotor defining a plurality of salient rotor poles substantially equally spaced about the rotor, each rotor pole having a pole face construction and defining an angular width, wherein the angular width of the rotor pole with the widest width is: (a) substantially equal to or greater than the angular width of the rotor pole with the narrowest width, and (b) less than 1.5 times the angular width of the rotor pole with the narrowest width; a stator defining at least one pair of salient stator poles, the stator poles of the at least one pair being radially opposed to one another and having substantially the same pole face construction as one another; a phase winding for energizing the at least one pair of stator poles over a plurality of discrete intervals, the energizing of the phase winding producing a given desired output on the rotor and producing normal forces tending to cause movement of the energized stator poles towards the rotor; wherein a first profile of the normal forces experienced by the at least one pair of stator poles over a first discrete interval is different from a subsequent profile of the normal forces experienced by the at least one pair of stator poles over a subsequent discrete interval.