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US 12,744,438 B2Granted
Electric motor having rotor and squirrel cage winding
AssigneeSew-Eurodrive GmbH & Co. KG
InventorLi Jinchang
Life of this patent
Estimating the term…
Abstract
An electric motor includes a rotor and a squirrel cage winding. The squirrel cage winding has two rings, which are axially spaced apart from each other and are interconnected by bars. The rotor has cutouts axially extending all the way through for receiving bars, and the cutouts are spaced apart from each other in the circumferential direction. The rotor has radially outwardly open axial grooves, and the radial distance range covered by the axial grooves contains the radial distance range covered by the bars.
Claims23
An electric motor, comprising:
- a squirrel cage winding including two rings axially spaced apart from each other and interconnected by bars;
- and
- a rotor including cutouts axially extending all the way through, spaced apart from each other in a circumferential direction, and adapted to receive the bars, the rotor including radially outwardly open axial grooves, a radial distance range covered by the axial grooves containing a radial distance range covered by the bars;
- wherein first bars of the squirrel cage winding connect the two rings together and other bars of the squirrel cage winding end blindly in respective ones of the radially outwardly open axial grooves;
- and
- wherein the other bars of the squirrel cage winding that end blindly in respective axial grooves do not connect the two rings together.
3 more elements
An electric motor, comprising:
- a squirrel cage winding including two rings axially spaced apart from each other and interconnected by bars;
- and
- a rotor including cutouts axially extending all the way through, spaced apart from each other in a circumferential direction, and receiving the bars, the rotor including radially outwardly open axial grooves, a radial distance range covered by the axial grooves containing a radial distance range covered by the bars;
- wherein first bars of the squirrel cage winding connect the two rings together and other bars of the squirrel cage winding end blindly in respective axial grooves;
- and
- wherein the other bars of the squirrel cage winding that end blindly in respective axial grooves do not connect the two rings together.
3 more elements
Dependencies are inferred from the claim text.