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Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Hi all, today I have my first full power running good Mini DRSSTC, It is a Halfbridge of stgw30nc60wd that is 60A 600V 200A Pulsed that I have sampled from ST. The power input is a 127Vac mains with a doubler, that I get 300VDC Bus, smoothed with 1000uF cap bank for each side of the doubler. 7 Turn primary with 50nF 1600V cap bank (I know I should get a bigger voltage cap bank, but that is only for testing for a few secs)
Fres = 244kHz Consuming 2,5A from 50BPS and 10A from 600BPS
Here are the results:
I was placed a wrong video! Sorry! Now its corrected!
Registered Member #989
Joined: Sat Sept 08 2007, 02:15AM
Location: São Paulo, Brazil
Posts: 476
Yeah, the calcs give 10 times the DC Bus Voltage, so for run at 127VAC mains I get 150VDC bus, so I will get 1500V at primary cap. But with doubler I get 300VDC Bus and 3kV Primary Cap.
I was testing a few things on the coil, when I get 70cm sparks, I get a spark on the heatsink, and the two igbts died :( I will buy more, and next time I will put my 1.5KE220CA (two in series) in anti-parallel with igbt to prevent that thing to happen.
It breaks on two points, I dont know why, I dont have any sharp place on toroid (its equal along it) but it is working fine there. And is looking good too :D
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My NEW Mini DRSSTC
