Patent ID: 7148777
Filing Date: 2006-12-12
Classification: F25B,H01F,Y02B

Abstract:
1. A permanent magnet assembly comprising: a first upper radial permanent magnet and a second upper radial permanent magnet; each upper radial permanent magnet formed as a polyhedral solid having six or more essentially planar faces comprising an upper face substantially parallel to and opposite a lower face, an inside lateral face opposite an outside lateral face, and an inside radial face substantially parallel to and opposite an outside radial face, wherein its upper and lower faces are substantially orthogonal to its inside and outside radial faces; each upper radial permanent magnet having a magnetization vector wherein its inside radial face is a flux exit face, its outside radial face is a flux entry face, and its upper and lower faces are flux parallel faces; and wherein the inside lateral face of the first upper radial permanent magnet is fastened to the inside lateral face of the second upper radial permanent magnet; a first lower radial permanent magnet and a second lower radial permanent magnet, each central lower radial permanent magnet formed as a polyhedral solid having six or more essentially planar faces comprising an upper face substantially parallel to and opposite a lower face, an inside lateral face opposite an outside lateral face, and an inside radial face substantially parallel to and opposite an outside radial face, wherein its upper and lower faces are substantially orthogonal to its inside and outside radial faces; each lower radial permanent magnet having a magnetization vector wherein its inside radial face is a flux entry face, its outside radial face is a flux exit face, and its upper and lower faces are flux parallel faces; and wherein the inside lateral face of the first lower radial permanent magnet is fastened to the inside lateral face of the second lower radial permanent magnet; a first central axial permanent magnet and a second central axial permanent magnet; each central axial permanent magnet formed as a polyhedral solid having six or more essentially planar faces comprising an upper face substantially parallel to and opposite a lower face, an inside lateral face opposite an outside lateral face, and an inside radial face substantially parallel to and opposite an outside radial face, wherein its upper and lower faces are substantially orthogonal to its inside and outside radial faces; each central axial permanent magnet having a magnetization vector wherein its inside radial face and outside radial face are flux parallel faces, its upper face is a flux exit face, and its lower face is a flux entry face; wherein the inside lateral face of the first central axial permanent magnet is fastened to the inside lateral face of the second central axial permanent magnet; wherein the upper face of the first central axial permanent magnet is magnetically coupled to the lower face of the first upper radial permanent magnet; wherein the lower face of the first central axial permanent magnet is magnetically coupled to the upper face of the first lower radial permanent magnet; wherein the upper face of the second central axial permanent magnet is magnetically coupled to the lower face of the second upper radial permanent magnet; and wherein the lower face of the second central axial permanent magnet is magnetically coupled to the upper face of the second lower radial permanent magnet; a first upper axial permanent magnet and a second upper axial permanent magnet; each upper axial permanent magnet formed as a polyhedral solid having six or more essentially planar faces comprising an upper face substantially parallel to and opposite a lower face, an inside lateral face opposite an outside lateral face, and an inside radial face substantially parallel to and opposite an outside radial face, wherein its upper and lower faces are substantially orthogonal to its inside and outside radial faces; each upper axial permanent magnet having a magnetization vector wherein its inside radial face and outside radial face are flux parallel faces, its upper face is a flux entry face, and its lower face is a flux exit face; wherein the inside lateral face of the first upper axial permanent magnet is fastened to the inside lateral face of the second upper axial permanent magnet; wherein the inside radial face of the first upper radial permanent magnet is magnetically coupled to the outside radial face of the first upper axial permanent magnet; wherein the inside radial face of the second upper radial permanent magnet is magnetically coupled to the outside radial face of the second upper axial permanent magnet; a first lower axial permanent magnet and a second lower axial permanent magnet; each lower axial permanent magnet formed as a polyhedral solid having six or more essentially planar faces comprising an upper face substantially parallel to and opposite a lower face, an inside lateral face opposite an outside lateral face, and an inside radial face substantially parallel to and opposite an outside radial face, wherein its upper and lower faces are substantially orthogonal to its inside and outside radial faces; each lower axial permanent magnet having a magnetization vector wherein its inside radial face and outside radial face are flux parallel faces, its upper face is a flux entry face, and its lower face is a flux exit face; wherein the inside lateral face of the first lower axial permanent magnet is fastened to the inside lateral face of the second lower axial permanent magnet; wherein the inside radial face of the first lower radial permanent magnet is magnetically coupled to the outside radial face of the first lower axial permanent magnet; wherein the inside radial face of the second lower radial permanent magnet is magnetically coupled to the outside radial face of the second lower axial permanent magnet; whereby a first gap experiencing a high magnetic field is formed between at least a portion of the lower face of the first upper axial permanent magnet and at least a portion of the upper face of the first lower axial permanent magnet, and a second gap experiencing a high magnetic field is formed between at least a portion of the lower face of the second upper axial permanent magnet and at least a portion of the upper face of the second lower axial permanent magnet.