On 9/17/11 7:33 AM, dave pierson wrote:
As an aside I believe that the humble dimmer switch contains a thyristor (SCR) so the wave form which it produces is a chopped version of the mains AC, not a sinusoid of lower magnitude.I suspect, more commonly, a triac (think: bidirectional SCR.). The comment on chopped/distorted sine is well made. \
OTOH, a good low pass filter would turn that phase controlled sine into a nice sine..
Considering that you might already have a honkin big inductor (technical term, that) for current limiting, such a LPF might not be a big deal.
You could also do what utilities do for cycloconverters and DC links... Build tuned filters to suppress the specific harmonics.. _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla