发明授权
US5646502A Emergency lighting circuit for shunt-regulated battery charging and lamp
operation
失效
用于并联电池充电和灯管操作的紧急照明电路
- 专利标题: Emergency lighting circuit for shunt-regulated battery charging and lamp operation
- 专利标题(中): 用于并联电池充电和灯管操作的紧急照明电路
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申请号: US519804申请日: 1995-08-28
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公开(公告)号: US5646502A公开(公告)日: 1997-07-08
- 发明人: James C. Johnson
- 申请人: James C. Johnson
- 申请人地址: GA Atlanta
- 专利权人: NSI Enterprises, Inc.
- 当前专利权人: NSI Enterprises, Inc.
- 当前专利权人地址: GA Atlanta
- 主分类号: H02J7/02
- IPC分类号: H02J7/02 ; H02J9/02 ; H01M10/46
摘要:
Battery charging circuits configured as a combination of current limited charging sources and a shunt regulating path to bypass current from a battery charging path through a low impedance path so that charge current can be regulated and terminated or controlled, the invention further includes combination of the circuits in emergency lighting systems utilizing conventional AC mains power in a non-emergency mode and DC battery power in an emergency mode, the battery being charged with regulation of charge current effected by said circuits when in the non-emergency mode. In the present circuits, current is by-passed from that portion of the circuit used for battery charging by provision of a low impedance alternate path through which current may also be supplied to non-emergency lamps, the alternate path supplanting prior art circuits which function by continuously turning a single path on and off for charge regulation. In primary embodiments, the circuits use the charging path to also drive the non-emergency lamps. Current through the alternate shunt regulating path drives the non-emergency lamps in the normal non-emergency mode without passing of the current through the battery.
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