Elevator regenerative drive with automatic rescue operation
US8230978B2 · kind B2 · utility
32Cited by
17References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | May 29, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/027
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A system (10) continuously drives an elevator hoist motor (14) during normal and power failure operating conditions. A regenerative drive (30, 34, 36) delivers power to the hoist motor (14) from a main power supply (17) during the normal operating condition and from a backup power supply (24) during the power failure operating condition. A controller (12) operates the regenerative drive (30, 34, 36) to provide available power on the regenerative drive (30, 34, 36) to the backup power supply (24) during the normal operating condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.