[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
Re: X10 signals can be TOO strong!
In article <qtdgh.203122$Fi1.110592@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, JeffVolp@xxxxxxx (Jeff Volp) writes:
| "Alan Vogel" <avogel2@xxxxxxxxxxxxx> wrote in message
| news:6e5gh.30252$wP1.27181@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
| > It looks like the 30Vpp signals that appear on the MT1 and MT2 pins of the
| > triac are exceeding the triac's dV/dt spec. These signals capacitively
| > couple to the triac's gate and turn it on. Sensitive gate triacs
| typically
| > have higher dV/dt limits, but are probably not used in the modules because
| > they are more expensive.
|
| That makes sense. The inductor in series with the triac should limit the
| dV/dt, but perhaps not enough. I recall Insteon had to change an inductor
| to resolve their flicker problem. I don't understand why this seems to
| effect modules running near their maximum load.
Perhaps the heavier the load the greater the amplitude of the carrier
across the triac?
Dan Lanciani
ddl@danlan.*com
comp.home.automation Main Index |
comp.home.automation Thread Index |
comp.home.automation Home |
Archives Home