No-back synchronous motor drive
US4166226A · kind A · utility
3Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1976 |
| Grant date | Aug 28, 1979 |
| Priority date | — |
| Expiry date | Oct 14, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/1185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a permanent magnet type of synchronous a.c. motor embodying an improved form of no-back by which the motor upon being energized is caused to start from rest invariably in the predetermined direction of rotation. Furthermore, the motor is capable of satisfactory operation in a wider range of angular positions of the motor shaft than prior motors, and it is inherently more sensitive to initiate the direction of rotation correctly than devices of the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.