Linear brushless DC motor with ironless armature assembly
US6800966B2 · kind B2 · utility
10Cited by
9References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Apr 27, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/066
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear motion device is disclosed which includes an armature assembly, and a field assembly which includes a plurality of permanent magnets each having a length, and a plurality of pole pieces each having a length. The ratio between the length of the plurality of permanent magnets and the length of the plurality of pole pieces is tailored to achieve a constant force versus stroke characteristic, when sinusoidal commutation is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.