- Months of work: May 2010
- Approximate Build Time: A couple weeks, plus a couple months of tweaking and design
- Max Voltage: 60,000
- Max Stored Energy: 200J
The hardest part of the fusor for me was getting 50kV at 10mA. I spent about 8 months spending all my time on high voltage supplies, and came up with this series resonant design during the end of that time period. I had no experience in power electronics so this was quite a challenge. This was also the beginning of my ongoing obsession with everything high voltage.
The design was primarily taken from Steve Ward’s website (his high voltage capacitor charger) since I didn’t know enough to design my own at the time, with a few over-current protection additions I put in.
Drive electronics and the depressing H-Bridge.
50% duty cycle driving of a series resonant inductive load. Perfect soft switching at around 30khz.
An upgraded dual-ferrite transformer to feed a 5-stage multiplier.
3 stages of the 5 stage multiplire.