Large Tesla coil - Kaizer DRSSTC III - Static load test

#teslacoil #DRSSTC #electronics #IGBT
Full article: kaizerpowerelec...
225 VDC and primary circuit switching 1000 A, most of the noise comes from the mechanical vibrations of the metal can with water that is placed in the middle of the primary coil.
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[@SAMGO4]

Those EMI on the camera electronics are amazing 😂

[@Alexelectricalengineering]

Wow !! Thumbs up ;)

[@Antagon666]

I would have a question about phase compensation, is it necessary to tune phase lead at full power/bus voltage ?
Also I found out that when I remove load, the switching is perfect ZCS, but with static load or secondary coil attached, it shifts the switching phase... (at 40V bus, can't measure more with my Oscope)

[@KaizerPowerElectronicsDk]

You need 100V minimum on the DC bus to get past the most switching spikes from C-E output capacitance resonant transients. Check out Coes in the datasheet on how it falls with higher voltage. Adjust with static load in.

[@felixb.1756]

Get a differential probe. You should ideally measure it exactly as you plan to run the coil. Full power with secondary. for that just put the scope on normal mode and do a single short burst with the interrupter.

[@Antagon666]

@@felixb.1756 I got a "high voltage" scope, anyways my secondary just blew up 4 months ago...

[@felixb.1756]

@@Antagon666 well that sucks. Never had any problems with secondaries. Did you put varnish on it?

[@Antagon666]

@@felixb.1756I did, but I abused that coil a lot.
When I bought the coil almost a year ago, I was testing a helical primary, and had a flashover, so I cleaned it with a toothbrush, reapplied varnish on the burnt spot etc.
I've changed the primary to pancake coil, and it was working fine, doing about 1,2m lightnings, and I finally had proper phase tuning.
Then I've decided to make a wooden base instead of plastic one, which resulted in a new primary which was much tighter, and I've managed to make 1,8m long discharges, then my MMC blew up like popcorn.
Anyways, as I built new MMC, and was testing at lower power, the coil blew up while doing 10ms pulses for fun. I suspect it was because of the previous damage, combined with much tighter coupling, and long pulses, which just vaporized the windings.