Phase separator insulator for electric machine stator
AssigneeHamilton Sundstrand Corporation
InventorsJoseph Kenneth Coldwate, Wilfredo E. Colon Velazquez, Gordon W. Friske
Life of this patent
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Abstract
An insulating phase separator is used in an electric machine to separate phase windings in a stator assembly. The insulating phase separator includes first and second endturn portions and first and second leg portions. The first and second endturn portions each have a curved outer surface and a tabbed portion located opposite the curved outer surface. The first and second leg portions extend between the first and second endturn portions and are integral with the first and second endturn portions.
Claims11
An insulating phase separator employed in a stator assembly of an electric machine to separate phase windings installed within the stator assembly, the insulating phase separator comprising:
- first and second endturn portions, each having a curved outer surface and a tabbed portion located opposite the curved outer surface;
- and
- first and second leg portions that extend between the first and second endturn portions and are integral with the first and second endturn portions.
A stator assembly for an electric machine, the stator assembly comprising:
- a stator core having a plurality of stator teeth extending radially inward from the stator core, the plurality of stator teeth defining a plurality of stator slots for receiving phase windings;
- a first phase winding having windings located in a first plurality of the stator slots and having endturn portions extending beyond the stator core;
- a first phase separator located adjacent the first phase winding, the first phase separator having first and second endturn portions and first and second leg portions integrally formed with and connecting the first endturn portion with the second endturn portion, wherein the first and second leg portions fit within the stator slots and the first and second endturn portions each have inner and outer surfaces that are curved to match a geometry of the endturn portions of the first phase winding;
- and
- a second phase winding having windings located in a second plurality of stator slots and having endturn portions extending beyond the stator core, wherein the first phase separator electrically insulates the first phase winding form the second phase winding.
A method of winding a plurality of phase windings around a stator assembly, the method comprising:
- winding a first phase winding through a first plurality of slots in the stator assembly defined by a plurality of stator teeth extending radially inward from a stator core, the first phase winding having a plurality of endturn portions;
- locating a plurality of first phase separators adjacent the first phase winding, wherein each of the first phase separators include first and second endturn portions connected by first and second leg portions that extend between the first and second endturn portions and are integral with the endturn portions, each endturn portion including an outer curved surface and an inner curved surface that defines a geometry that is aligned with a geometry of the endturn portions of the first phase winding;
- winding a second phase winding through a second plurality of slots in the stator assembly defined by the plurality of stator teeth extending radially inward from the stator core, wherein the first phase separators are located between and provide electrical isolation between the first phase winding and the second phase winding.
Dependencies are inferred from the claim text.