Synchronous motors
US4315202A · kind A · utility
10Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1980 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Apr 8, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A synchronization arrangement for delaying excitation of the field winding (5) of a brushless synchronous motor until the motor rotor has run up approximately to synchronous speed in which the appropriate moment for applying the field excitation is determined by monitoring two signals respectively representative of the currents in two rectifying devices (11, 15) separately connected, oppositely poled, across the motor field winding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.