Electric motor with axial and radial permanent magnets
AssigneeCity University of Hong Kong
InventorsChunhua Liu, Rundong Huang, Zaixin Song
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Abstract
There is disclosed a motor (100) comprising: a stator (120), comprising a core (122) and a plurality of windings (124); and a rotor (140), comprising a plurality of permanent magnets (150, 152, 154), wherein a first portion of the magnets (150, 152) is disposed on two axial rotor portions (142, 144) in close proximity to two respective axial sides of the windings (124), and a second portion of the magnets (154) is disposed on a radial rotor portion (146) in close proximity to a radial side of the windings (124), and wherein energising the windings (124) causes a torque to be applied to the rotor (140) via said two axial rotor portions (144, 144) and said radial rotor portion (146).
Claims10
A motor comprising:
- a stator, comprising a core and a plurality of windings;
- and
- a rotor, comprising a plurality of permanent magnets, and configured to rotate about an axis,
- wherein a first portion of the magnets is disposed on two axial rotor portions extending normal to the axis and facing two respective axial sides of the windings, and a second portion of the magnets is disposed on a radial rotor portion extending parallel to the axis facing a radial side of the windings,
- wherein energising the windings causes a torque to be applied to the rotor via said two axial rotor portions and said radial rotor portion,
- wherein at least one of the first and second portions of magnets are arranged to form a plurality of Halbach arrays, wherein each consecutive magnet is rotated by 45 degrees relative to the preceding magnet, and
- wherein the arrangement of magnets on each axial rotor portion is a mirror copy of the arrangement of magnets on the other.
Dependencies are inferred from the claim text.