1-phase self starting disk-type brushless motor with cogging element
US4725752A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Sep 22, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K29/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A 1-phase coreless disk-type brushless motor comprises a single position-detecting element located at a stationary position corresponding to a magnetically active conductor portion of an armature coil or coils on a stator yoke. A cogging-generating magnetic element having a width substantially equal to the width of each pole of a field magnet is located such that the center radial line between the width thereof is spaced by a distance equal to about three fourths of the pole width from another magnetically active conductor portion of the armature coil or coils so that the magnet rotor may stop at a position from which the motor can start itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.