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

Claim 22:
23. A displacement device comprising:
a stator comprising a plurality of elongated coils shaped to provide an annular working region wherein traces of the coils are generally linearly oriented, the plurality of elongated coils comprising:
a first plurality of coil traces distributed over a first annular coil region of a first layer at a corresponding first stator Z-location, the first plurality of coil traces generally linearly elongated in radial stator directions in the first annular coil region; and

a moveable stage comprising a plurality of magnet arrays, the plurality of magnet arrays comprising:
a first magnet array distributed over at least a first portion of an annular magnet region and comprising a plurality of first magnetization segments generally linearly elongated in stage radial directions in the annular magnet region, each first magnetization segment having a magnetization direction generally orthogonal to its corresponding stage radial direction and each of the first magnetization segments having a magnetization direction different from that of its neighboring first magnetization segment; and

one or more amplifiers connected to drive current in the plurality of coils and to thereby effect relative movement between the stator and the moveable stage.