Rotor and reluctance motor
AssigneeKSB Aktiengesellschaft
InventorsDaniel Gontermann, Jochen Schaab, Joachim Schullerer
Life of this patent
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Abstract
A rotor for an electrical machine, in particular synchronous reluctance machine, is provided. The rotor is formed as a cylindrical structure having a magnetically soft element formed with an even number of salient magnetic poles openings for forming magnetic flux barriers. The openings are at least partially filled with a diamagnetic and/or paramagnetic medium and the diamagnetic and/or paramagnetic medium may axially and tangentially fix the magnetically soft element relative to the rotor. A method for producing such a rotor and apparatus using the rotor, including a reluctance motor, in particular a synchronous reluctance motor, that uses the rotor are provided.
Claims13
A rotor for an electrical machine, comprising:
- a magnetically soft element having an even number of magnetic poles of the rotor and cut-out portions arranged as magnetic flux barriers of the rotor, the magnetically soft element including a plurality of laminations co-axially arranged in a lamination stack on a rotor rotation axis;
- at least one distance element arranged on the rotor rotation axis axially between two adjacent ones of the plurality of laminations;
- and
- at least one of a diamagnetic and paramagnetic medium arranged to at least in part fill the cut-out portions of the rotor,
- wherein
- the distance element has an outer radius smaller than an outer radius of the adjacent laminations,
- the magnetically soft element, the at least one of the diamagnetic and the paramagnetic medium and the at least one distance element are configured to cooperate with one another to form a substantially cylindrical rotor shape, with an annular intermediate space between the outer radius of the at least one distance element and the outer radius of the two adjacent laminations being at least partially filled by the at least one of the diamagnetic and the paramagnetic medium such that the medium in the intermediate space is linked to the medium in the cut-out portions exposed to the intermediate space.
A method for producing a rotor, comprising the acts of:
- forming a magnetically soft, cylindrical element having an even number of magnetic poles of the rotor and cut-out portions arranged as magnetic flux barriers of the rotor having cut-out portions by assembling a plurality of laminations co-axially into a lamination stack with at least one distance element arranged co-axially between two adjacent ones of the plurality of laminations, the at least one distance element having an outer radius smaller than an outer radius of adjacent ones of the plurality of laminations, the lamination stack forming a rotor core configured to rotate on a rotation axis of a rotor shaft of the rotor;
- and
- at least in part filing the cut-out portions and an annular intermediate space between the outer radius of the at least one distance element and the outer radius of the two adjacent laminations with at least one of a diamagnetic and a paramagnetic medium such that the medium in the intermediate space is linked to the medium in the cut-out portions exposed to the intermediate space,
- wherein the magnetically soft element, the at least one of the diamagnetic and the paramagnetic medium and the at least one distance element cooperate with one another to form a substantially cylindrical rotor shape.
An electrical machine having the rotor claimed in 1.
Dependencies are inferred from the claim text.