Elevator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 28, 2020
Grant Date -
Mar 1, 2018
app pub date -
Jun 29, 2017
filing date -
Aug 29, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to an elevator comprising an elevator control having a motor drive of an elevator motor driving an elevator car on an movement path, which motor drive comprising a frequency converter with a rectifier bridge designed to be connected to mains, a converter bridge for feeding the elevator motor and an intermediate DC circuit located in-between, the elevator further comprising a brake drive for supplying energy to at least two motor brakes with the brake drive being connected to the intermediate DC circuit as well as an emergency power supply battery designed to allow safe release of passengers in case of a power outage. According to the invention the battery is connected to the intermediate DC circuit, and the elevator control has a measuring circuit connected to the intermediate DC circuit and the elevator control has a battery testing module which is configured to apply a defined load to the battery and to measure the voltage of the DC circuit for a defined time period. The battery testing module comprises a comparator for comparing the measured voltage with at least one stored first threshold value, whereby the elevator control is configured to issue a replacement signal for the battery dependent on the signal of the comparator.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully