Sensorless electric machine
AssigneeGeneral Electric Company
InventorsKum Kang Huh, Patel Bhageerath Reddy, Ayman Mohamed Fawzi El-Refaie, Patrick Lee Jansen, Roy David Schultz, Lembit Salasoo
Life of this patent
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Abstract
A rotor component that comprises a rotor circuit configured for use with either an interior permanent magnet (IPM) machine or a synchronous reluctance machine (SRM) that includes a pole circuit made of a conductive, non-magnetic material and has a midpoint that substantially aligns with a d-axis of the IPM or SRM. An electric machine with a similar rotor component therein or having a loop or ring of a conductive, non-magnetic material that is substantially concentric about a d-axis of the electric machine.
Claims18
A rotor component comprising:
- a rotor circuit configured for use with one of an interior permanent magnet (IPM) machine and a synchronous reluctance machine (SRM), the rotor circuit comprising:
- at least one pole circuit, wherein the at least one pole circuit are made of a conductive, non-magnetic material and a midpoint of the least one pole circuit substantially aligns with a d-axis of the IPM or SRM.
An electric machine comprising:
- a rotor core;
- a stator configured with a plurality of stationary windings therein;
- a plurality of openings disposed within the rotor core;
- and
- a rotor circuit structure comprising at least one pole circuit disposed in a predetermined location, wherein said predetermined location is such that a midpoint of the least one pole circuit substantially aligns with a d-axis of the electric machine.
An electric machine comprising:
- a rotor core;
- a stator configured with a plurality of stationary windings therein;
- a plurality of openings disposed within the rotor core;
- a rotatable shaft therethrough;
- and
- a rotor circuit structure comprising at least one loop or ring of a conductive, non-magnetic material, wherein said at least one loop or ring is substantially concentric about a d-axis of the electric machine.
Dependencies are inferred from the claim text.