Method and device for generating a frame check sequence
US6075774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A self-starting brushless electric motor having: a first motor part (stator) (11) with poles (15S, 16A) arranged in a first pole row, said poles comprising for each winding phase a pole group (13) including a pole pair consisting of a reluctance pole (15S) and a permanent-magnet pole (16A), only one such pole group being provided for each winding phase; a second motor part (rotor) (12) movable with respect to the first motor part (11) and provided with reluctance poles (18A) arranged in a second row of poles opposite to the first row of poles; and a magnetizing winding (17) on the first motor part (11). At least one of the pole rows exhibits a magnetic asymmetry providing a preferential relative direction of movement of the motor parts (11, 12) upon energization of the winding. The poles (15S, 16A) of the pole pair of the first pole row are spaced-apart such that whenever a pole of the pair is magnetically aligned with a pole (18A) of the second pole row, the other pole of the pair is magnetically misaligned with the next adjacent pole of the second pole row. A ferromagnetic auxiliary pole means (20) is provided on the first motor part (11) and positioned such that whenever the per…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.