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US 10,256,686 B2Granted
Rotor and method for producing a rotor
AssigneeEfficient Energy GmbH
InventorsHolger Sedlak, Oliver Kniffler
Life of this patent
Estimating the term…
Abstract
A rotor includes a rotor shaft with a mounting portion along a mounting region of the shaft; and a plurality of permanent magnets mounted in the mounting portion on the rotor shaft, wherein the rotor shaft includes, in the mounting portion, a region with a radius reduced with respect to a circular cross-section, such that a radially measured thickness of a permanent magnet is greater in the region than in an adjacent region with non-reduced radius of the rotor shaft.
Claims9
Rotor, comprising:
- a rotor shaft with a mounting portion along a mounting region of the shaft;
- and
- a plurality of permanent magnets mounted in the mounting portion on the rotor shaft, wherein the permanent magnets are shaped such that they are connected to the rotor shaft in an interlocking manner in the mounting portion, and wherein the plurality of permanent magnets are magnetized in vertical or horizontal direction when the rotor shaft is oriented such that a symmetry axis of the permanent magnets coincides with a horizontal or vertical reference axis,
- wherein the rotor shaft comprises, in the mounting portion, four flattened regions with a radius reduced with respect to a circular cross-section in non-flattened regions, such that a radially measured thickness of a permanent magnet in a flattened region is greater than in an adjacent non-flattened region with non-reduced radius of the rotor shaft,
- wherein the four flattened regions are arranged symmetrically along the circumference of the rotor shaft, wherein each flattened region comprises an angular sector of at least 35° and at the most 45°, wherein a flattened region is smaller with respect to the angular sector than two adjacent non-flattened regions together, and wherein a permanent magnet in a flattened region and two adjacent non-flattened regions in the mounting portion is connected to the rotor shaft in an interlocking manner.
2 more elements
Method for producing a rotor, comprising:
- mounting a plurality of permanent magnets on a mounting portion of a rotor shaft, wherein the permanent magnets are shaped such that they are connected to the rotor shaft in the mounting portion in an interlocking manner, and wherein the plurality of permanent magnets are magnetized in vertical or horizontal direction, when the rotor shaft is oriented such that a symmetry axis of the permanent magnets coincides with a horizontal or vertical reference axis,
- wherein the rotor shaft comprises, in the mounting portion, four flattened regions with a radius reduced with respect to a circular cross-section in non-flattened regions, such that a radially measured thickness of a permanent magnet in a flattened region is greater than in an adjacent non-flattened region with non-reduced radius of the rotor shaft,
- wherein the four flattened regions are arranged symmetrically along the circumference of the rotor shaft, wherein each flattened region comprises an angular sector of at least 35° and at most 45°, wherein a flattened region is smaller with respect to the angular sector than two adjacent non-flattened regions together, and wherein a permanent magnet in a flattened region and two adjacent non-flattened regions in the mounting portion is connected to the rotor shaft in an interlocking manner.
Dependencies are inferred from the claim text.