Radially embedded permanent magnet rotor and methods thereof

摘要

In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture.

主权项

1. A permanent magnet rotor comprising:
at least one permanent magnet; a substantially cylindrical rotor core comprising an outer edge and an inner edge defining a central opening, said rotor core having a radius R, said rotor core further comprising at least one pole and at least one radial apertur extending radially through said rotor core from said outer edge to a predetermined depth less than said radius, said at least one radial aperture configured to receive said at least one permanent magnet; and at least one protrusion extending into said at least one radial aperture, said at least one protrusion positioned substantially along a bottom of said at least one radial aperture and configured to facilitate retention of said at least one permanent magnet within said at least one radial aperture; and wherein said predetermined depth of said at least one radial aperture is a depth between a minimum depth defined by the equationDmin=(π*R)n,  and a maximum depth defined by the equationDmax=R-0.5⁢ttan⁡(180n),  wherein n is the number of poles of the rotor core and t is the thickness of said at least one permanent magnet.