40V, 15A cap dump

[Donald Haas]

Hi All,
The setup is a "Dual Pole" built from scratch with 5 run coils and five run mags. Also 4 gen coils close to the perimeter.
1" x 3/8" round neo mags. Rotors are mirror images of each other because they are not symetrical.
12 x 15,00uF cap bank.
Dumping into 24V bank of Golf Cart batteries.
Input is about 300W.
Transistors 7 x five circuit boards run slightly above ambient with no heat sinks.

Dump circuit is the Monster Driver by John Stone on UFOPolitics' threads.
Only 2 mosfets with heatsink and fan. They run at about 100degF.
The circuit is triggered by arduino (my choice).
I'll post some vids and pics on dropbox soon.

I first tried a 100Amp DC contactor with copper/silver contacts and it was good for a couple hours, then the contacts welded.

Then I tried the Monster driver and it works extremely well.
I could push it up much higher, but for now I want to give a golf cart 24v bank a good charge. 22.5A is the C20.

John Stone is an EE from Germany that specializes in High Amp DC switching with mosfets.

His Monster driver is designed to handle 600V, 200A. I've tested it at 1800W and the fets stayed cool with no fan.

Be talkin'.

bro d

[Dupe]

Hi Donald, looking forward to more information etc. Have done several experiments using alternative charging techniques in the past. I seldom use my cap discharger which consists of 4 x 10,000uF caps radiant charged to 30v and dumped every 3 seconds into 12v lead acid car batteries, I found that it took far to long to charge my batteries but where not in the best condition to be fair.

[Donald Haas]

A few pics

Hi Dupe,

I have some pics that are self explanatory to experienced builders.

All the "rich" info about the monster driver circuit is on the UFOPolitics threads.
Look for John Stone and Monster Driver.

I redrew it in Target3001 and made it in 2 sections.

I can share those files.

I milled the frame parts and rotors on my router out of mdf.

Also milled the 5, 7 tranny boards.

Milling isolation tracks is better then etching .........they hold up much better when replacing blown parts.

bro d

[Donald Haas]

Drop Box link

Drop box link for Monster driver with PDF manual and Target3001 renderings by John Stone and a redo by myself which was much easier for me to build. Target 3001 is a free version of electronic circuit software.
John Stone likes to teach about hi-pwr DC switching. He is professionally advanced in "the art".

https://www.dropbox.com/sh/ctz1jcngn...C8wBDbXta?dl=0

[Dupe]

Thanks for your reply Donald, will take a look. Cheers Dupe