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Elevator brake control including a solid state switch in series with a relay switch
专利权人:
OTIS ELEVATOR COMPANY
发明人:
Rogers Kyle W.
申请号:
US201114347652
公开号:
US9617117(B2)
申请日:
2011.10.06
申请国别(地区):
美国
年份:
2017
代理人:
Carlson, Gaskey & Olds
摘要:
An exemplary elevator brake control device includes a relay switch that is associated with a safety chain configured to monitor at least one condition of a selected elevator system component. The relay switch is selectively closed to allow power supply to an electrically activated elevator brake component responsive to the monitored condition having a first status. The relay switch is selectively opened to prevent power supply to the brake component responsive to the monitored condition having a second, different status. A solid state switch is in series with the relay switch between the relay switch and the brake component. A driver selectively controls the solid state switch to selectively allow power to be supplied to the brake component only if the relay switch is closed and the monitored condition has the first status.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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