[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

new(?) sstc driver idea



Original poster: "Jan Wagner by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jwagner-at-cc.hut.fi>

Hi,

just an idea that occured to me, dunno if it has some flaws or not...

Idea is: build a full-bridge to drive the TC primary, have a current
transformer in series with the primary. Because the current is
sinusoidal so will the output voltage of the current sensing section
be (although phase migh have to be adjusted). The driver board would
only need some sort of comparators + flip-flop setup which senses the
zero-voltage crossing (i.e. primary zero current crossing) and then
toggles the next MOSFETs on. If current sense output voltage gets over
some threshold, blank pulses with other flip-flop until next ZVC.

Should be very simple! Self-tuning without any oscillator or AFC/PLL,
and overcurrent-protected. Preliminary microsim simulations showed it
would work (darn I hate that 64 nodes limit in the microsim demo
version...)

Any thoughts? Someone already tried something like this? Works?
Doesn't?

cheers,
Jan