Securing assembly of bandages for synchronous motors with outer permanent magnets
AssigneeSiemens Aktiengesellschaft
InventorFelix Ludwig
Life of this patent
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Abstract
A rotor structure for an electric motor includes a cylindrical rotor core assembly and a plurality of permanent magnets disposed on an outer circumference of the rotor core assembly. Wrapped around the rotor core assembly is a bandage to secure the permanent magnets in place, wherein the bandage has a bandage edge arranged in proximity of an end surface of the rotor core assembly. In order to securely fix the bandage edge in place, a securing ring is disposed radially over the bandage edge of the bandage to hold the bandage against the rotor core assembly.
Claims16
A rotor structure for an electric motor, comprising:
- a cylindrical rotor core assembly having an end surface face;
- a plurality of permanent magnets disposed on an outer circumference of the rotor core assembly;
- a bandage wrapped around the rotor core assembly to secure the permanent magnets in place, said bandage having a bandage edge arranged in proximity of the end surface of the rotor core assembly;
- and
- a securing ring disposed radially over the bandage edge of the bandage to hold the bandage against the rotor core assembly.
A method of making a rotor structure for an electric motor, comprising the steps of:
- providing a cylindrical rotor core assembly;
- placing a plurality of permanent magnets on an outer circumference of the rotor core assembly;
- wrapping a bandage about the rotor core assembly so as to secure the permanent magnets in place;
- and
- restraining an edge of the bandage by fitting a securing ring to an end surface of the rotor core assembly.
Dependencies are inferred from the claim text.