发明授权
- 专利标题： Modular dimming ballast with decoupled half-bridge topology
- 专利标题（中）： 具有解耦半桥拓扑的模块化调光镇流器
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申请号： US12888475申请日： 2010-09-23
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公开(公告)号： US08471475B1公开(公告)日： 2013-06-25
- 发明人: Wei Xiong
- 申请人： Wei Xiong
- 申请人地址： US AL Madison
- 专利权人： Universal Lighting Technologies, Inc.
- 当前专利权人： Universal Lighting Technologies, Inc.
- 当前专利权人地址： US AL Madison
- 代理机构： Waddey & Patterson, P.C.
- 代理商 Mark J. Patterson; Gary L. Montle
- 主分类号： H01J7/44
- IPC分类号： H01J7/44
摘要：
An electronic ballast is provided and a method for operating one or more lamps. The ballast and method provide for true parallel lamp operation, with preheating of lamp filaments during a dimming operation. Switching losses are reduced by ensured soft switching operation. An inverter switch driver is arranged to provide first drive signals to a shared line branch having a first switch shared among a plurality of decoupled inverter drive modules and to provide second drive signals to a plurality of independent line branches each having a switch and associated with one of the decoupled inverter drive modules. A soft switching control circuit is coupled to the first switch and configured so as to maintain a soft switching operation for the first switch.
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