Switched reluctance machine
AssigneeROLLS-ROYCE plc
InventorsShanmukha RAMAKRISHNA, Ellis F H CHONG
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Abstract
A switched reluctance machine is provided, the machine includes a stator having a circumferential row of magnetically energizable teeth carrying coil windings. The machine further includes a coaxial variable reluctance rotor having a circumferential row of magnetisable poles, the reluctance of the rotor-to-stator magnetic flux path varying with rotor position. Each pole has first and second side flanks and a tip surface, one of the side flanks forming a leading edge surface of the pole, the other side flank forming an opposite, trailing edge surface of the pole, and the tip surface arcing from the leading edge surface to the trailing edge surface and facing the stator to form an air gap to the teeth of the stator. Also each pole contains one or more cavities.
Claims11
A switched reluctance machine including:
- a stator having a circumferential row of magnetically energizable teeth carrying coil windings;
- and
- a coaxial variable reluctance rotor having a circumferential row of magnetisable poles, the reluctance of the rotor-to-stator magnetic flux path varying with rotor position;
- wherein each pole has first and second side flanks and a tip surface, one of the side flanks forming a leading edge surface of the pole, the other side flank forming an opposite, trailing edge surface of the pole, and the tip surface arcing from the leading edge surface to the trailing edge surface and facing the stator to form an air gap to the teeth of the stator, and wherein each pole contains one or more cavities, the or each cavity being offset such that it is closer to one of the side flanks than the other side flank, and being located such that it is completely covered by the arc of the tip surface.
Dependencies are inferred from the claim text.