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Light dimmer for conventionally wound transformers supplying LV halogen lamps and/or filament bulbs working on phase-control principle
Light dimmer for conventionally wound transformers supplying LV halogen lamps and/or filament bulbs working on phase-control principle
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机译:常规绕线变压器的调光器,用于按相控原理工作的低压卤素灯和/或白炽灯泡
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摘要
The dimmer has a multistage filter (1) between the line and neutral conductors to reject the audio frequency components in the mains and in addition, through a control circuit comprising a filter member (r1,c1), a multistage filter (the same one as before?) and a window discriminator(2), is in a position to reject DC components in the load current, generated by the magnetic properties of the load or by the control circuit itself, by suitable shifting of the firing angle. With unacceptably high phase-shifting in fault situations with unloaded transformers, the phase section is prolonged and the end stage is controlled for the whole time, thus preventing asymmetries.
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