Two-pole single-phase synchronous motor with permanent-magnet rotor, and starting device for use in the single-phase synchronous motor
US5118977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to a two-pole single-phase synchronous motor having a permanent-magnet rotor (11), a magnetic detent torque, which viewed over one revolution exhibits positive and negative values with resulting stable and unstable rest positions, the stable rest positions being offset in the positive direction relative to the average direction of the stator field (39) by the asymmetry angle (.gamma.), and a critical detent torque (M.sub.K1kr) being active in the parallel position of the stator field (9) and the rotor field (41), and a starting device provided with rotational backlash between a driving member connected to the rotor (11) and a load member, and with a directional blocking device (22).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.