Patent ID: 11894719
Assignee: FORD GLOBAL TECHNOLOGIES, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A multiple-piece permanent magnet of an electric machine comprising:
a prismatic body having opposing first and second ends, opposing front and back faces extending axially between the opposing ends, and opposing first and second sides extending axially between the opposing ends and extending laterally between the opposing faces, the body being formed of multiple pieces and including:
a central piece of magnetic material having a front surface that forms a portion of the front face, a back surface that forms a portion of the back face, and a side surface extending between the front and back surfaces, wherein the central piece has a first magnetically easy crystallographic axis that is substantially normal to the faces, and

a first corner piece joined to the side surface and having a front surface that forms a portion of the front face, a side surface that forms a portion the first side, and an end surface that forms a portion of the first end, wherein the front corner piece has a second magnetically easy crystallographic axis that is oblique to the first easy axis, wherein the body further includes a second corner piece joined to the side surface of the central piece and to a back surface of the first corner piece, the second corner piece having a back surface that forms a portion of the back face, a side surface that forms a portion of the first side, and an end surface that forms a portion of the first end, wherein the second corner piece has a third magnetically easy crystallographic axis that is oblique to the first easy axis.