Elevator system
US5389749A · kind A · utility
22Cited by
10References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 24, 1992 |
| Grant date | Feb 14, 1995 |
| Priority date | — |
| Expiry date | Jun 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P5/74
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An elevator system which is provided with power converters, electric motors supplied with power from the power converters, and a torque distributing section having functions for determining allocation of output power from the power converters on the basis of a required torque, by which an elevator is operated on the basis of functions selected in accordance with the operation mode. The system is able to save power in the elevator operation and also improve control functions and increase system capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.