Eldarion and Bruce's build of Bob's Energy Converter

[Rich SAS]

Eldarion, that bulb is about 1/4 lit. I don't want to take it to much further as I am getting close to exceeding the 1200 volt rating of the IGBT's. There is a peak on the scope, its kinda hard to see, near the right side that's at 1000 volts peak. Have already wiped out two of those big bricks. 

Rich

[eldarion]

Hi Rich,

So your setup isn't quite overunity in the TEM sense yet, correct?

All,

I have cranked the primary drive voltage up to 160V and connected the 60W light bulb directly across the secondary (with no HV potential yet).  This step has significantly cleaned up the primary drive waveforms.

Also, with the entire system consuming about 50W of power, there was a very dim glow coming out of the 60W light bulb.  This glow took a second or so to appear while the filament heated up.  Until the bulb was lit, the primary drive waveform was atrocious due to the high filament resistance and therefore low loading of the secondary.

This scope shot of the F1 (highest frequency) primary was taken with 5uS pulse width, 40KHz highest frequency, 20Khz next lowest, etc. in rotational mode with the bulb dimly lit: http://www.falconir.com/pics/primary_one_highest_frequency_high_voltage.jpg

I have not yet placed an HV potential on the secondary side, as I only had one 160V isolated power supply built.  I will need to construct another supply before I can perform that test.

Eldarion

[Jdo300]

Hey Rich,

Could you possably save your bricks by shunting the HV spikes over X volts back into the positive battery supply rather than burning them up on your bricks? Maybe using zeners or something like that may help save you? Just a thought.

Also, I'm very suprised that your inputs are ringing that much at that low a frequency. Do you see the same ringing if you hook the IGBTs across something like a resistor? I'm curious to know if the ringing is just coming from the brick itself or the coil.

God Bless,
Jason O

[Rich SAS]

Hey guy's, hope to have a new scope shot up soon, made some changes to the primary side that's made quite a difference in current draw and LEM output. Looks like it cleaned up the waveforms nicely too. 

Rich

[eldarion]

Sounds good!  Looking forward to hearing more...

Eldarion