Wedges with Q-axis damper circuits
AssigneeHamilton Sundstrand Corporation
InventorsDhaval Patel, Andreas C. Koenig
Life of this patent
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Abstract
A rotor for an electrical machine includes a rotor core having a plurality of circumferentially spaced apart rotor poles. Windings are seated in gaps between circumferentially adjacent pairs of the rotor poles. A wedge secures the windings in each gap. The wedge includes a first member made of a first material and at least one second member made of a second material. The second material has a higher electrical conductivity than the first material. The wedge is configured to supply Q-axis damping. A pair of end plates is connected electrically to the at least one second member at opposing longitudinal ends thereof thereby completing a Q-axis winding circuit for each wedge.
Claims12
A rotor for an electrical machine comprising:
- a rotor core having a plurality of circumferentially spaced apart rotor poles;
- a plurality of windings seated in gaps between circumferentially adjacent pairs of the rotor poles;
- a wedge securing the windings in each gap, wherein the wedge includes a first member made of a first material and at least one second member made of a second material, the second material having a higher electrical conductivity than the first material, the wedge being configured to supply Q-axis damping, wherein the second member has a cross-section surrounded by the first member;
- and
- a pair of end plates connected electrically to the at least one second member at opposing longitudinal ends thereof thereby completing a Q-axis winding circuit for each wedge.
Dependencies are inferred from the claim text.