Elevator control system
US4086983A · kind A · utility
7Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1975 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Aug 6, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/281
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct current motor for an elevator car includes an armature and an interpole winding or a series field winding serially connected to the armature and controlled by a static Ward-Leonard device. A filter includes the interpole or series field winding and a series combination of a capacitor, a resistor, a reactor and a fuse with or without a series reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.