	US 12,081,076 B2
	Electric machines using axially-magnetized curvilinear permanent magnets
Mark Senti, Melbourne, FL (US); and Philippe Masson, Rockledge, FL (US)
Filed by Advanced Magnet Lab, Inc., Melbourne, FL (US)
Filed on Jul. 14, 2023, as Appl. No. 18/222,382.
Application 18/222,382 is a continuation in part of application No. PCT/US2022/012622, filed on Jan. 14, 2022.
Application PCT/US2022/012622 is a continuation in part of application No. PCT/US2021/030980, filed on May 5, 2021.
Claims priority of provisional application 63/137,363, filed on Jan. 14, 2021.
Prior Publication US 2023/0361635 A1, Nov. 9, 2023
Int. Cl. H02K 1/27 (2022.01); H02K 1/02 (2006.01); H02K 1/278 (2022.01)

CPC H02K 1/278 (2013.01) [H02K 1/02 (2013.01)]

15 Claims

1. A system of permanent magnets for a rotor of an electric machine, comprising:

a plurality of axially-magnetized curvilinear permanent magnets that are configured in a rotor;

each magnet of said plurality of axially-magnetized curvilinear permanent magnets being elongate, having a cross sectional shape, and having a curvilinear longitudinal axis;

wherein each magnet of said plurality of axially-magnetized curvilinear permanent magnets is disposed such that the resulting magnetic field vector inside each of the plurality of axially-magnetized curvilinear permanent magnets is substantially aligned with said curvilinear permanent magnet axial magnetization;

wherein the curvilinear longitudinal axis of each magnet of said plurality of axially-magnetized curvilinear permanent magnets is further defined as being arcuate in shape, said arcuate shape having an apex, and an open end, and wherein said curvilinear longitudinal axis of each magnet of said plurality of axially-magnetized curvilinear permanent magnets is contained within a plane;

wherein the plane of said curvilinear longitudinal axis each magnet of said plurality of axially-magnetized curvilinear permanent magnets is oriented orthogonally to an axis of rotation of a rotor comprising said plurality of axially-magnetized curvilinear permanent magnets;

wherein the apex of the arcuate-shaped longitudinal axis of each magnet of said plurality of axially-magnetized curvilinear permanent magnets is oriented towards said axis of rotation of said rotor;

wherein the axially-magnetized curvilinear permanent magnets are arranged into an even number of arrays, each array comprising two or more axially-magnetized curvilinear permanent magnets nested together with their magnetic North ends adjacent to one another, forming an array magnetic North end, and with their magnetic South ends adjacent to one another, forming an array magnetic South end; and

wherein each array is oriented so that its array magnetic North pole end is adjacent to an array magnetic North pole end of the adjacent array, and each array oriented so that its array magnetic South pole end is adjacent to an array magnetic South pole end of the opposing adjacent array.