Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1845
| Posted: 10:45pm 31 Dec 2022 |
Thanks for the information. As I won't be using GTI back charging that is one less thing to deal with. The power bank is 25kW of LiFePO4 Dual BMS batteries with equalizers.
I would like to go to with 4 power boards, much cleaner build and optimizes the heat sink and layout. But there is that problem of getting boards.
I have full workshop drill press and taps, been designing and building electronic equipment since my early teens so not a problem from the construction point of view. I only have one Aerosharp heat sink, but have four of the big SMA units (almost as big), and one huge heat sink that makes the Aerosharp look positively tiny
Power wise I need to handle up to 15kW for a few seconds, maybe 3kW to 4kW 5% of the time and <1kW 95% of the time.
Anyway all good info, I have a bit more reading to do, but getting to that stage of having a really good understanding of the nature of the beast, having reached that point I am now deciding how I want to implement the build, so nothing is cast in stone yet.
I am going to use 3 x 1.2kW SMA toriods stacked and opened out to at least 100mm. Wind them to a flux density of 1 Tesla and favor low idle current, the cores should handle 15kW inrush current to the Induction motors starting heavy shaft loads. The Current 5kW HF inverter can handle the the 12kw startup of the Compressor, 10kW Band Saw but can't quite hold the bigger load of the Huge 3HP Dust extraction system trying to spin-up the massive Steel Fan. It just needs another second or so and it would have it running. Still find that amazing, especially from 24v HF inverter. Of course the New inverter will be running at 50v.