Induction motor including rotor having end segment protrusions
AssigneeSchaeffler Technologies AG & Co. KG
InventorsTuo LUO, Eber Calebe PEREIRA DA SILVA
Life of this patent
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Abstract
An induction motor rotor includes a metal core; and an electrically conductive metal contiguous with the metal core. The electrically conductive metal includes rotor bars extending along the metal core and a first end segment and a second end segment formed onto opposite ends of the rotor bars. The first end segment and the second end segment each includes a base section extending a first axial distance from the metal core and a protrusion extending a second axial distance from the metal core. The second axial distance is greater than the first axial distance. Each of the protrusions is spaced radially inward from an outermost circumferential surface of the respective base section.
Claims20
An induction motor rotor comprising:
- a metal core;
- and
- an electrically conductive metal contiguous with the metal core, the electrically conductive metal including rotor bars extending along the metal core and a first end segment and a second end segment formed onto opposite ends of the rotor bars,
- the first end segment and the second end segment each including a base section extending a first axial distance from the metal core and a protrusion extending a second axial distance from the metal core, the second axial distance being greater than the first axial distance,
- each of the protrusions being spaced radially inward from an outermost circumferential surface of the respective base section.
An induction motor comprising:
- a stator;
- and
- a rotor rotatable with respect to the stator, the rotor comprising:
- a metal core;
- and
- an electrically conductive metal contiguous with the metal core, the electrically conductive metal including rotor bars extending along the metal core and a first end segment and a second end segment formed onto opposite ends of the rotor bars,
- the first end segment and the second end segment each including a base section extending a first axial distance from the metal core and a protrusion extending a second axial distance from the metal core, the second axial distance being greater than the first axial distance,
- each of the protrusions being spaced radially inward from an outermost circumferential surface of the respective base section.
A method of manufacturing an induction motor rotor comprising:
- joining an electrically conductive metal to a metal core to form rotor bars interleaved between circumferentially spaced segments of the metal core and end segments formed onto opposite ends of the rotor bars, each of the end segments protruding axially past the metal core and including a base section extending a first axial distance from the metal core and a protrusion extending a second axial distance from the metal core, the second axial distance being greater than the first axial distance,
- the protrusions being formed to cause a radial center of each of the first end section and the second end section to be further away from a center axis of the induction motor rotor than a centroid of the respective first end section and the second end section.
Dependencies are inferred from the claim text.