[Stiive]

Originally Posted by PStechPaul

I am boosting 24VDC from 2 batteries to about 300VDC for a VFD so I can power a 240 VAC 3 phase motor. Previously I had the output connected in doubler mode, so I got 300 VDC from just one 12V battery. You can see it in action where I take a ride on my electric tractor, using just one 17 A-H battery, and drawing only about 250 watts.
http://youtu.be/y0qWY4bVnEA

Haha that's wicked!

Originally Posted by PStechPaul

I'm using LTSpice, which is totally free and very powerful. If you use Linear Technology components, they have just about every model as well as basic circuits. Here's the schematic, from a screen capture:



And a screen shot of the simulation showing some of the waveforms:



If you want to use this tool, just download it from:
http://www.linear.com/designtools/software/

You can also load the ASC file for this DC-DC converter:
http://www.enginuitysystems.com/pix/...CT_Doubler.asc

It's a simple text file.

Yeh i have LTSpice, I'm a bit of a hoarder with simulation software :P
Might try loading that ASC file and see whats up.

Might also try a simple buck setup and see what sort of voltage spikes to expect