Patent ID: 11936270
Assignee: THE UNIVERSITY OF BRITISH COLUMBIA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The displacement device according to claim 2, wherein the moveable stage comprises:
a second magnet array comprising a plurality of angularly spaced apart second magnetization segments, each second magnetization segment generally linearly elongated in a second radial stage direction, each second magnetization segment having a second magnetization direction generally orthogonal to its respective direction of elongation and at least two of the second magnetization segments having second magnetization directions that are different from one another;
a third magnet array comprising a plurality of angularly spaced apart third magnetization segments, each third magnetization segment generally linearly elongated in a third radial stage direction, each third magnetization segment having a third magnetization direction generally orthogonal to its respective direction of elongation and at least two of the third magnetization segments having third magnetization directions that are different from one another;
a fourth magnet array comprising a plurality of angularly spaced apart fourth magnetization segments, each fourth magnetization segment generally linearly elongated in a fourth radial stage direction, each fourth magnetization segment having a fourth magnetization direction generally orthogonal to its respective direction of elongation and at least two of the fourth magnetization segments having fourth magnetization directions that are different from one another;
wherein each second radial stator direction extends from a third point, each third radial stator direction extends from a fourth point and each fourth radial stator direction extends from a fifth point; and
wherein the first, second, third and fourth magnet arrays are angularly spaced apart from one another.