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Zero voltage crossing

Zero voltage crossing

Zero voltage crossing

(OP)
I'm looking for a schematic for a zero voltage crossing detector.

Application: thyristor triggering
Input voltage: 50-700Vrms
Frequency: 45-65Hz
Accuracy: better than 50us over the full voltage and frequency range.

RE: Zero voltage crossing

What type of signal are you looking for at zero crossing.  I have several possible circuits.

RE: Zero voltage crossing

hi...

try website of POWEREX, TECCOR and INTERNATIONAL RECTIFIER...

DYDT

RE: Zero voltage crossing

I'm not sure exactly what you're doing here but www.cyclosystems.com has a few circuits you may find useful and off the shelf equipment etc. They operate a zero crossing mains signalling system that we have been using here for 20 years.

RE: Zero voltage crossing

(OP)
To Lewish:

I'm looking for a pulse synchronised with the zero voltage crossing: this pulse should be delayed not more than 50us after zero crossing! The main problem here is to avoid all the interferences which occur in a standard grid!

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