Elevator braking in a battery powered elevator system
US9586789B2 · kind B2 · utility
1Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2013 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Aug 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An elevator system includes a battery; a machine having a motor to impart motion to an elevator car; an inverter having a plurality of switches to convert DC power from the battery to AC power for the machine in a motoring mode; a speed sensor coupled to the machine, the speed sensor to generate a speed signal indicative of machine speed; and a controller to apply braking signals to a group of the switches in a braking mode, the braking signals having a duty cycle in response to the speed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.