发明公开
- 专利标题： DIMMING CIRCUIT FOR POWERING GAS DISCHARGE LAMPS
- 专利标题（中）： 调光电路用于驱动放电灯
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申请号： EP95910147.0申请日： 1995-02-01
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公开(公告)号： EP0698336A1公开(公告)日： 1996-02-28
- 发明人: NOTOHAMIPRODJO, Hubertus , WONG, John, M. , STEPHENS, Dennis, L.
- 申请人： MOTOROLA LIGHTING, INC.
- 申请人地址： a subsidiary corporation of MOTOROLA, INC., 887 Deerfield Parkway Buffalo Grove, IL 60089 US
- 专利权人： MOTOROLA LIGHTING, INC.
- 当前专利权人： MOTOROLA LIGHTING, INC.
- 当前专利权人地址： a subsidiary corporation of MOTOROLA, INC., 887 Deerfield Parkway Buffalo Grove, IL 60089 US
- 代理机构： Morgan, Marc, et al
- 优先权： US19940209323 19940310
- 国际公布： WO1995024819 19950914
- 主分类号： H05B41
- IPC分类号： H05B41
摘要：
A ballast circuit uses an optocoupler (140) to provide electrical isolation of the dimming control (152) from the remainder of the ballast. The optocoupler (140) is operated in the linear range to provide continuous dimming of the lamps. The circuit further uses a combination of diodes and a diode bridge (206) to steer current from the current sensor during the lamp out conditions so that the inverter (100) will maintain operation at a low frequency, thereby maximizing the output voltage. A clamp winding is used to insure that the voltage does not exceed the DC rail voltage.
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