Attaching a stator to an endbell of an axial flux rotating electrical machine
AssigneeMaxxwell Motors, Inc.
InventorsMichael Cunnyngham, Maksym Pryimak
Life of this patent
Estimating the term…
Abstract
Embodiments involve rotors for axial flux induction rotating electric machines that use a soft magnetic composite for the rotor core. A first embodiment is directed to a rotor for a rotating electrical machine that transmits magnetic flux parallel to a shaft of the rotor. The rotor includes a rotor winding and a plurality of cores. The rotor winding consists of a solid piece of conductive material that comprises a plurality of cavities. Each core is placed in a respective cavity and comprises a highly resistive isotropic ferromagnetic powder.
Claims11
An axial flux rotating electrical machine, the machine comprising:
- an endbell;
- a stator core made of a magnetic composite having a first coefficient of expansion, comprising:
- a plurality of teeth, each transmitting flux from a magnetic circuit and separated from adjacent teeth by a slot,
- a base portion connecting the plurality of teeth and shorting the magnetic circuit, and
- a lip extending from the base portion;
- and
- a bracket that attaches to the endbell and engages with the lip to hold stationary the single-piece stator in the endbell, the bracket comprised of a magnetically neutral metal having a second coefficient of expansion, the second coefficient of expansion different from the first coefficient of expansion;
- and
- a coating between the magnetically neutral metal and the lip such that the stator core remains attached to the endbell at a given operating temperature range of the machine given the different first and second coefficients of expansion.
Dependencies are inferred from the claim text.