INTERIOR PERMANENT MAGNET MACHINE WITH POLE-TO-POLE ASYMMETRY OF ROTOR SLOT PLACEMENT

摘要

An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first angle is defined between respective centerlines of the first and second slots. A second angle is defined between respective centerlines of the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is reduced. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor.

主权项

1. An interior permanent magnet machine comprising:
a rotor having a center and a plurality of slots, the rotor being configured to magnetically interact with a stator; a first and a second pole having centrally-located first and second pole axes in the rotor, respectively; wherein the plurality of slots includes first, second, third and fourth slots, the first and second slots being disposed in the first pole and the third and fourth slots being disposed in the second pole; wherein the first, second, third and fourth slots are substantially arc-shaped; a first barrier defined by the first, second, third and fourth slots; a first angle defined between the first and second slots, and a second angle defined between the third and fourth slots; and wherein the first angle is sufficiently different from the second angle to reduce torque ripple.