RiseTime Posted October 31, 2006 Share Posted October 31, 2006 Came across some sine wave dimming recently from robert juliat. What is the big deal with sine wave anyway ? Link to comment Share on other sites More sharing options...
David A Posted October 31, 2006 Share Posted October 31, 2006 Huge advantage- no dimmer noise-kinder on the power feed-can drive transformers without overheating. Link to comment Share on other sites More sharing options...
Tomo Posted October 31, 2006 Share Posted October 31, 2006 Silent Dimming The primary advantage is lower noise - at PLASA I surprised a few sound engineers by showing them a silent parcan. They will also dim loads that forward and reverse phase dimmers can't, and in some installations they can save money as they remove the reactive currents - this also makes them kinder to generator sets. Link to comment Share on other sites More sharing options...
jifop Posted November 1, 2006 Share Posted November 1, 2006 except they react slower than triac dimmers Link to comment Share on other sites More sharing options...
obsoperator Posted November 2, 2006 Share Posted November 2, 2006 Well, having spent 4 years at a concert hall which special-ordered "long rise-time" jumbo filter chokes, I'd say no consultant should ever spec a concert hall today without sine wave dimming. Every time we got a new batch of A-shape house light lamps, (say, with a redesigned filament support) there was some sort of crisis. Note that the house lights can be very close to the patrons. I don't know if the filter chokes were the tipping point, but in a concert hall, the dimmers are on for 16 hours a day, and the modern racks ran very hot. (Old version ETC.) You wouldn't expect power-cube failures, but we had them regularly. Link to comment Share on other sites More sharing options...
patricevolts Posted November 2, 2006 Share Posted November 2, 2006 Sine wave dimmer for theatre always ramp output so lamp slow. Sine dimmer I see design for live shows is fast as triac or scr dimmer Patrice Link to comment Share on other sites More sharing options...
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