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Forums
4hv.org :: Forums :: General Science and Electronics
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What wrong with my new ZVS?

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Harry
Thu Apr 12 2012, 03:28PM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
 		I'd say buy some IRFP260's (or 250's, I see no difference between the two in real life)
Or buy another ZVS driver :P
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Gabriel35
Thu Apr 12 2012, 07:28PM
Gabriel35 Registered Member #2310 Joined: Wed Aug 19 2009, 08:04PM
Location: Santa Catarina - Brazil
Posts: 169
 		No difference? And what aboun the lower RDS(ON) of the 260N and higher current capability?
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Harry
Thu Apr 12 2012, 07:32PM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
 		I'm not saying the 260 isn't better, but in this circuit I saw no noticable difference when I swapped the 250's with 260's.
However when I built the Mazzili induction heater replacing 250's with 260's really made a difference as I was pulling around 30 amps.
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Platinum
Thu Apr 12 2012, 10:23PM
Platinum Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
 		The 260's can handle much higher current, and that means fatter arcs.
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Harry
Fri Apr 13 2012, 08:55AM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
 		But ZVS flyback driver generally only pull around 10 amps, which both 'FETs can ahndle just fine.
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Platinum
Sat Apr 14 2012, 11:50PM
Platinum Registered Member #3926 Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
Harry wrote ...

But ZVS flyback driver generally only pull around 10 amps, which both 'FETs can ahndle just fine.

10 at what voltage?, most people run them at 36v.
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Harry
Sun Apr 15 2012, 08:24AM
Harry Registered Member #4081 Joined: Wed Aug 31 2011, 06:40PM
Location: UK
Posts: 139
 		Yes it is around that voltage, but I use a transformer so there may be some voltage sag. They still don't heat up though.
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