Rotor for an electric machine, retainer for retaining a winding in a slot in a rotor, and method of manufacturing a rotor
AssigneeLucas Industries Limited
InventorJohn Cooper
Life of this patent
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Abstract
A rotor for an electric machine, the rotor comprising: a rotor body having a plurality of axially extending, circumferentially spaced slots therein; at least one winding conductor disposed in each said slot; and a retainer located in each said slot radially outwardly of the or each said winding conductor for limiting radial outward movement of the or each winding conductor; wherein each retainer has a radially inwardly directed surface configured so as to locate the or each winding conductor in a predetermined position in its respective slot. The invention further resides in a retainer and in a method of manufacturing a rotor.
Claims11
A rotor for an electric machine, the rotor comprising:
- a rotor body having a plurality of axially extending, circumferentially spaced slots therein;
- at least one winding conductor disposed in each said slot;
- and
- a retainer located in each said slot radially outwardly of said at least one winding conductor for limiting radial outward movement of said at least one winding conductor;
- wherein each retainer has, in lateral cross-section, a radially inwardly presented concave surface and a radially outwardly presented convex surface, said convex surface and said concave surface having their centres of curvature spaced apart such that the thickness of the retainer in its central region exceeds the thickness of the retainer in its marginal regions, and said concave inner surface of said retainer co-operates with said at least one winding conductor to locate said at least one winding conductor in a predetermined position in its respective slot.
A rotor for an electric machine, the rotor comprising:
- a rotor body having axially extending, circumferentially spaced slots therein;
- at least one winding conductor disposed in each said slot;
- and
- a retainer located in each said slot radially outwardly of said at least one winding conductor for limiting radial outward movement of said at least one winding conductor,
- wherein each said retainer has, in lateral cross-section, a radially inwardly presented concave surface and a radially outwardly presented convex surface, said convex surface and said concave surface having their centres of curvature spaced so that the retainer has a greater thickness in its central region than in its opposite marginal regions, and said retainer presenting no axially extending corners to the wall of the slot in which it is located.
A rotor for an electric machine, the rotor comprising:
- a rotor body having a plurality of axially extending, circumferentially spaced slots therein;
- at least one winding conductor disposed in each said slot;
- and
- a retainer for limiting radial outward movement of said at least one winding conductor,
- wherein each said retainer has, in lateral cross-section, a radially inwardly presented concave surface and a radially outwardly presented convex surface, the centres of curvature of said concave surface and said convex surface being spaced so that said retainer has a thickness, in a central region, which exceeds its thickness in the opposite marginal regions of the retainer, and said slots each have a radially outwardly directed mouth for permitting radial insertion of said at least one winding conductor therethrough, said retainer and a surface of said respective slot each being configured so as to permit radial insertion of said retainer into said slot and secure location of said retainer in a position radially outwardly of said at least one winding conductor within said slot.
A retainer for retaining a winding conductor in a slot in a rotor, the retainer being elongate and having, in lateral cross-section, a concave surface and an opposite, convex surface, the centres of curvature of said convex surface and said concave surface respectively being spaced so that said retainer has a thickness in its central region which exceeds its thickness in the marginal regions on opposite sides, respectively, of said central region.
Dependencies are inferred from the claim text.