Hi Welshman,
Good to see your post.
Looks like you had a smoke test.
Are you going to rebuild the lf driver board or replace it?
Hi, dochubert, I'm now on my second smoke test.
I've got one driver board on order and two dead boards. I've got a load of NY and MY's, will replace those on the driver boards first as I'm sure they will have blown and test other components then rebuilding them. Will be having a go at repairing everything.
The mostfet boards sm-resistors have all been damaged, except one or two. incorrect resistance now being read with multimeter. So everything except the led and it's resistor are being replaced.
Handy RJ-45 connector was used as a spacer to fit the mosfets.
I have a few control boards now and have also acquired a nice giant chloride motive power 48v+ battery charger. Will push 60v@70+amps into the batteries, but it gets very hot on the transistor side. It has a giant EH transformer in it, very heavy. Going to turn this into a backup, just need to get hold of a few power boards. Either from powerjack or have them made by pcbway.com using oztules gerber files. i would have already ordered them off pcbway, but the oztules gerber files i have scavenged from old threads don't seem to display correctly, the drill holes are in the wrong place.
The idea is to have a backup inverter using this, don't care about efficiency. It gets expensive to run a 18kw genset all the time while the powerjack is down for repair.
Ill be doing an overhaul on the unit this time. Suspending those toroid's using straps to expose the center and back to air cooling. Will help keep things cooler on those roasting hot days summer days, if we have any. Moving a few things around to make repair easier and tidying up the wiring and mounting external fuse box to avoid opening to see fuse states.
ive included a few screen shots from the software i wrote for the raspberry pi that monitors the voltage of the batteries and controls the inverter faults/generator start stops. i thought you would be interested to see how the LTO batteries handle to loads.