Rotor configuration for switched reluctance motor with minimized torque ripple
AssigneeBoard of Regents, The University of Texas System
InventorsBabak Fahimi, Seyed Ehsan Movahed Mohammadi, Mehdi Moallem
Life of this patent
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Abstract
A hybrid switched reluctance motor is provided that reduces torque ripple. A novel rotor design includes flux barriers. The flux barriers are positioned and shaped to create implicit saliency and reluctance torque for the motor. A gradual change in the motor reluctance results which avoids rapid increases in flux density. The rotor also increases efficiency by reducing acoustical and vibrational responses and associated energy loses.
Claims21
A hybrid switched reluctance motor comprising:
- a stator, having a plurality of stator poles;
- a rotor, having a plurality of rotor poles and a plurality of interpole segments located between the plurality of rotor poles;
- and,
- wherein each interpole segment of the plurality of interpole segments further comprises a concave void radially aligned with an arcuate flux barrier.
A method of operating a hybrid switched reluctance motor having a stator and a rotor having a plurality of interpole segments having a concave void and a plurality of flux barrier, the method comprising:
- energizing the stator to rotate the rotor relative to the stator;
- and,
- generating implicit saliency for the rotor using the concave void and a plurality of flux barriers located within each of the interpole segments.
A method of operating a hybrid switched reluctance motor comprising:
- providing a stator having a plurality of stator poles;
- providing a rotor having a plurality of rotor poles and a plurality of interpole segments located between the plurality of rotor poles;
- wherein each of the plurality of interpole segments has a concave void and a plurality of flux barriers, that generate reluctance torque within the hybrid switched reluctance motor;
- energizing the stator to rotate the rotor relative to the stator;
- and,
- generating implicit saliency for the rotor using the concave void and the plurality of flux barriers located within each of the interpole segments.
Dependencies are inferred from the claim text.