Method and apparatus for fault time operating of an elevator _
US4506766A · kind A · utility
37Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1984 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jul 3, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/027
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator drive motor 1 is normally energized from an AC power source 8 via an AC-DC converter 4 and a DC-AC inverter 3. When the power source fails the elevator is braked and the inverter is supplied from an emergency battery 11 to access the nearest floor for passenger discharge. If a fault occurs in the inverter it is disconnected from the motor by opening a switch contact 15a, and the closing of a further contact 15b enables the converter to energize the motor in a "reverse function" mode from the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.