Two-dimensional electric motor
US6127749A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1999 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Feb 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention includes a two-dimensional electric motor having two arrays of permanent magnets and at least two coils. The arrays of permanent magnets each have north and south poles distributed in both longitudinal and latitudinal directions along a plane. North poles in the first array are aligned with south poles in the second array, and south poles in the first array are aligned with north poles in the second array. The coil has a portion between the two arrays of permanent magnets. In another embodiment, the two-dimensional electric motor has an array of permanent magnets and two sets of two coils. The two sets of two coils are positioned on two different sides of the array. The invention permits simpler control methods, more stable motion, increased efficiency, and reduced stray magnetic fields. The invention should be particularly useful in semiconductor processing equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.