i am trying to switch off a triac at the opposite polarity after it switches on. The project of for a dual pulse spot welder. The first pulse which is about 50ms seems to be sitching off the opposit polarity but the some second pulse are not. As in the attached.
Is it the Time delay after the ZC that needs to be adjusted ? My Mains are 240VAC @ 50Hz and the delay i’v set after zc is 5630.
Any help would be appreciated.
Switch off at same polarity
Siwtch OFF at opposite Polarty