Invention Grant
- Patent Title: Displacement devices, moveable stages for displacement devices and methods for fabrication, use and control of same
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Application No.: US16428922Application Date: 2019-05-31
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Publication No.: US10707738B2Publication Date: 2020-07-07
- Inventor: Xiaodong Lu
- Applicant: The University of British Columbia
- Applicant Address: CA Vancouver
- Assignee: The University of British Columbia
- Current Assignee: The University of British Columbia
- Current Assignee Address: CA Vancouver
- Agency: Oyen Wiggs Green & Mutala LLP
- Agent Todd A. Rattray
- Main IPC: H02K41/00
- IPC: H02K41/00 ; H02K41/03 ; H02P25/064 ; H02P25/066

Abstract:
A displacement device includes a stator having non-parallel stator-x and stator-y elongated traces. The device includes a moveable stage having a first magnet array with first magnetization segments linearly elongated in a stage-x direction and having magnetization directions generally orthogonal to the stage-x direction. The first magnet array incorporates a first pair of adjacent first magnetization segments having two first magnetization segments adjacent to one another in a stage-y direction non-parallel to the stage-x direction. Each first magnetization segment in the first pair has a corresponding magnetization direction oriented at a corresponding angle αn about a corresponding stage-x axis as measured from a positive stage-z direction that is generally orthogonal to both the stator-x and stator-y directions. The corresponding angle αn is one of 45°+n90° where n is any integer. Each first magnetization segment in the first pair has a different magnetization direction.
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