公开(公告)号：US5619081A

公开(公告)日：1997-04-08

申请号：US183459

申请日：1994-01-18

申请人： Bernard J. Gershen ,  Alfred J. Lombardi ,  Edward J. Krajci ,  Yevgeny Shafir

发明人： Bernard J. Gershen ,  Alfred J. Lombardi ,  Edward J. Krajci ,  Yevgeny Shafir

IPC分类号： H02M5/257 ,  H05B39/08 ,  H01H47/00

CPC分类号： H05B39/08 ,  H02M5/257 ,  Y10S315/04 ,  Y10T307/826 ,  Y10T307/937

摘要： The present invention teaches a dimmer which incorporates an alternating current (AC) trigger which exhibits asymmetrical electrical characteristics. This eliminates the undesirable snap on hysteresis effect associated with conventional dimmers utilizing symmetrical AC triggers such as diacs and silicon bilateral switches (SBS). One embodiment of the present invention utilizes a zener diode to create the asymmetry. During one polarity of the AC source, the breakover voltage of the trigger is increased, forcing the trigger to breakover at a time later in the AC cycle than it would otherwise have with a symmetric trigger. This compensates for charge dumping of the phase control capacitor into the gate of the triac which would otherwise cause the snap on hysteresis effect.

摘要翻译： 本发明教导了一种包含具有不对称电特性的交流（AC）触发器的调光器。 这消除了利用对称的AC触发器（例如双向双极和双向双向开关（SBS））与常规调光器相关联的滞后效应的不期望的捕捉。 本发明的一个实施例利用齐纳二极管来产生不对称性。 在交流电源的一个极性期间，触发器的跳转电压增加，迫使触发器在AC循环后一段时间内与对称触发器所具有的相反。 这补偿了相控制电容器进入三端双向可控硅开关栅极的电荷转移，否则会导致卡滞滞后效应。

公开(公告)号：US5854519A

公开(公告)日：1998-12-29

申请号：US821748

申请日：1997-03-20

申请人： Bernard J. Gershen ,  Alfred J. Lombardi ,  Edward J. Krajci ,  Yevgeny Shafir

发明人： Bernard J. Gershen ,  Alfred J. Lombardi ,  Edward J. Krajci ,  Yevgeny Shafir

IPC分类号： H02M5/257 ,  H05B39/08 ,  H01H47/00

CPC分类号： H05B39/08 ,  H02M5/257 ,  Y10S315/04 ,  Y10T307/826 ,  Y10T307/937

摘要： The present invention teaches a dimmer which incorporates an alternating current (AC) trigger which exhibits asymmetrical electrical characteristics. This eliminates the undesirable snap on hysteresis effect associated with conventional dimmers utilizing symmetrical AC triggers such as diacs and silicon bilateral switches (SBS). One embodiment of the present invention utilizes a zener diode to create the asymmetry. During one polarity of the AC source, the breakover voltage of the trigger is increased, forcing the trigger to breakover at a time later in the AC cycle than it would otherwise have with a symmetric trigger. This compensates for charge dumping of the phase control capacitor into the gate of the triac which would otherwise cause the snap on hysteresis effect.

摘要翻译： 本发明教导了一种包含具有不对称电特性的交流（AC）触发器的调光器。 这消除了利用对称的AC触发器（例如双向双极和双向双向开关（SBS））与常规调光器相关联的滞后效应的不期望的捕捉。 本发明的一个实施例利用齐纳二极管来产生不对称性。 在交流电源的一个极性期间，触发器的跳转电压增加，迫使触发器在AC循环后一段时间内与对称触发器所具有的相反。 这补偿了相控制电容器进入三端双向可控硅开关栅极的电荷转移，否则会导致卡滞滞后效应。