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Yes, the square waveform on the scope is the output of one side of the H-bridge, using a x100 probe.
I built a new tank capacitor of 0.3uF, connected it up, and retuned the system with a signal generator. The new tuning point is about 4.4 turns. Ready for another high voltage test run tomorrow
Looking forward to that! Are you using the same IGBTs or newer 400A ones?
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
Great stuff Interesting to see the cycle-skipping current limit in action as well. I'm thinking the trigger source for that could come from a conventional desaturation detection circuit, with all 4 outputs OR'ed into the controller (instead of turning the IGBT off straight away). Maybe, maybe not, just thinking out loud as I've had too much whiskey!
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Odin The All-Fragger: a large DRSSTC
