Power minimizing controller for a stage assembly
US11075573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2018 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Nov 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K16/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for moving a stage includes coupling a stage mover to the stage, and directing current to the stage mover with a control system. The stage mover includes a magnet array and a conductor array positioned adjacent to the magnet array. The conductor array includes a first layer of coils and a second layer of coils, with the first layer of coils being closer to the magnet array than the second layer of coils. The control system directs current to the first layer of coils and the second layer of coils independently. Further, the control system directs more current to the first layer of coils than the second layer of coils during a movement step to reduce the power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.