POLE TO POLE VARIATION IN SHAPE OF INJECTION MOLDED MAGNETS OF INTERNAL PERMANENT MAGNET MACHINES

摘要

An internal permanent magnet machine includes a wound stator, and a rotor core. The rotor core includes a plurality of first pole cavities, and a plurality of second pole cavities. One of a plurality of magnets is disposed within each of the pole cavities, and is injection molded into their respective cavity. The first pole cavities and the second pole cavities are each arranged in a pre-defined configuration, such that each pole cavity of the first pole cavities is identically positioned with one of the pole cavities of the second pole cavities within their respective pre-defined configurations, to define a corresponding pair of pole cavities. The pole cavity of the first pole cavities and the pole cavity of the second pole cavities of at least one of the corresponding pair of pole cavities define a different shape relative to each other.

主权项

1. An internal permanent magnet machine comprising:
a wound stator; a rotor core including a first pole defining a plurality of first pole cavities, and a second pole defining a plurality of second pole cavities, wherein the rotor core magnetically interacts with the wound stator for rotation about a central axis of rotation; and a plurality of magnets, with one of the plurality of magnets disposed within each of the plurality of first pole cavities and the plurality of second pole cavities, wherein each of the plurality of magnets are injection molded into their respective cavity of the plurality of first pole cavities and the plurality of second pole cavities, such that each of the magnets is formed by the shape of their respective cavity; wherein the plurality of first pole cavities and the plurality of second pole cavities are each arranged in a pre-defined configuration, such that each pole cavity of the plurality of first pole cavities is identically positioned within the pre-defined configuration of the plurality of first pole cavities with one of the pole cavities of the plurality of second pole cavities within the pre-defined configuration of the plurality of second pole cavities, to define a corresponding pair of pole cavities; and wherein the pole cavity of the plurality of first pole cavities and the pole cavity of the plurality of second pole cavities of at least one of the corresponding pair of pole cavities define a different shape relative to each other, such that each magnet of each corresponding pair of magnets has a different shape relative to each other.