Rotor and electrical machine
AssigneeSiemens Aktiengesellschaft
InventorsOana Mucha, Wolfgang Wetzel
Life of this patent
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Abstract
The disclosure relates to a weight-optimized, meridian-accelerated rotor including permanent magnets securely supplied with a required cooling during use. The disclosure further relates to a corresponding electrical machine, in which the problem of demagnetization of existing permanent magnets due to rotor temperatures that are too high is avoided. The rotor or the rotor of an affected electrical machine has an annular structure on the outside radius for receiving the permanent magnets. The rotor also has a conical hub structure on an inside radius and a plurality of at least rib-shaped or blade-shaped structures between the annular structure and the conical hub structure in order to form a mechanical connection of the annular structure and conical hub structure.
Claims20
A rotor having a preferred direction of rotation, the rotor comprising:
- an annular structure arranged at an outer radius of the rotor;
- permanent magnets mounted within the annular structure;
- a conical hub structure arranged at an inner radius of the rotor, wherein the conical hub structure is a conical inner ring having a diameter that increases in the axial direction;
- and
- a plurality of rib-shaped or blade-shaped structures configured to mechanically connect the annular structure and the conical hub structure, wherein the plurality of rib-shaped or blade-shaped structures is provided between the annular structure and the conical hub structure, therein providing a blade duct through which ambient air flows when the rotor rotates in the preferred direction of rotation,
- wherein an outer boundary of the flowed-through blade duct is cylindrical and has a constant diameter.
An electrical machine configured as a meridian-accelerated axial blower, the electrical machine comprising:
- a stator;
- and
- a rotor having a preferred direction of rotation, the rotor comprising:
- an annular structure arranged at an outer radius of the rotor;
- permanent magnets mounted within the annular structure;
- a conical hub structure arranged at an inner radius of the rotor, wherein the conical hub structure is a conical inner ring having a diameter that increases in the axial direction;
- and
- a plurality of rib-shaped or blade-shaped structures configured to mechanically connect the annular structure and the conical hub structure,
- wherein the plurality of rib-shaped or blade-shaped structures is provided between the annular structure and the conical hub structure, therein providing a blade duct through which ambient air flows when the rotor rotates in the preferred direction of rotation,
- wherein an outer boundary of the flowed-through blade duct is cylindrical and has a constant diameter.
Dependencies are inferred from the claim text.