Device for regulating the speed of an asynchronous electric motor
US4677354A · kind A · utility
4Cited by
8References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The device comprises a variable frequency AC generator with means of exitation supplied by means for controlling exitation current, means for regulation of the frequency of the generator as a function of an index value, means for measuring actual speed of the mobile portion of the motor, and means for comparing actual speed with the index value. According to the invention, the means for controlling the exitation current are connected to the means for comparing actual speed with the index value, and the generator has a high internal reactance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.