Pole shoe arrangement for a machine element of an electrical machine
AssigneeSiemens Aktiengesellschaft
InventorsSilvio Semmer, Xavier Tourde, Adriana Cristina Urda
Life of this patent
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Abstract
A pole shoe arrangement for a rotor or a stator of an electrical machine having an air gap between the stator and the rotor is disclosed. The pole shoe arrangement has a pole shoe element having an inner end and an outer end opposing the inner end. The inner end lies opposite the air gap when the pole shoe element is in an assembled state. The pole shoe element has a receiving surface for receiving a permanent magnet between the inner end and the outer end. The pole shoe arrangement has a guiding facility to guide the permanent magnet in a radial direction from the outer end to the inner end and to limit a movement of the permanent magnet at right angles to the radial direction.
Claims11
A pole shoe arrangement for an electrical machine comprising a stator, a rotor and an air gap between the stator and the rotor, comprising:
- a pole shoe element comprising:
- an inner end lying opposite the air gap when the pole shoe element is in an assembled state,
- an outer end opposing the inner end,
- wherein an inner width in the peripheral direction along the inner end is larger than an outer width in the peripheral direction along the outer end of the pole shoe element, and
- a receiving surface for receiving a permanent magnet between the inner end and the outer end;
- and
- a guiding facility adapted to guide the permanent magnet in a radial direction from the outer end to the inner end and to limit a movement of the permanent magnet at right angles to the radial direction.
A method for assembling a rotor of an electrical machine, comprising:
- providing a pole shoe arrangement comprising two pole shoe elements that form a depression between the two pole shoe elements, wherein each pole shoe element comprises an inner end and an outer end opposing the inner end, and wherein the inner end lies opposite an air gap of the electrical machine when the each pole shoe element is in an assembled state, wherein an inner width in the peripheral direction along the inner end is larger than an outer width in the peripheral direction along the outer end of the pole shoe element;
- and
- providing a guiding facility to guide a magnet assembly in a radial direction from the outer end to the inner end and to limit a movement of the magnet assembly at right angles to the radial direction during radially inserting the magnet assembly into the depression.
Dependencies are inferred from the claim text.