What is the overall length of yours? I may have my pads changed to 1" instead of .75" based on your design. Thanks.
That is a massive torroid!Pictures of the inside of the MUST EP3000 6kW inverter:
View attachment 32591
2€ coin for scale:
View attachment 32592
View attachment 32593
I've not had time yet to check the electronics in detail, or check the brand of capacitor etc. The board does have a conformal coating, and the build quality seems pretty decent. The thing weighs around 35kg.
Yeah, there is no rush. It is the attention to detail i'm liking most.I'm preparing all the data, but I'll need another 6 months or so to give a full report. I'm currently charging my weakest LiFePO4 cell to do a capacity test after 6 months in use. The rest will follow as I find the time...
How much pressure do you need for this weld to take place?@ghostwriter66
1) yes, you could take the circular braid and put a lug on it. You probably have to experiment a bit selecting the correct size.
2) yes, no soldering. You take the (annealed) copper pipe, start flattening it in a (hydraulic) vise until it's 'flat' but not closed so you can slide the braid in (the full length of the pipe segment, in this case 25mm). Then compress the pipe segment with the braid. After compression you get a cold weld - internally, it will look like this:
How much pressure do you need for this weld to take place?
If I am going to do this, I want the cold weld. I can’t justify the purchase of a shop press for this, though (it’s not the money, is lack of space). Any other thoughts or suggestions? Anyone? I have a 12 ton hydraulic crimper. Perhaps I could fabricate a custom die?10 (metric) tons should do, 12 perhaps slightly better. A cheap manual hydraulic press should do for best results, for example something like this:
You usually can pick them up quite cheaply from local dealers.
That said, you can get very good results with a heavy duty vise. The very fist ones I made that way years ago without getting a weld, but they are still in use to this day without issues.
Now that is tiny and portable. I like. Did you fabricate the frame yourself?
Would a cheaper hydraulic vise(6-ton) do the trick? Like the one linked. I'm very interested in using braids like this for a 24v mobile system to reduce stress on the battery terminals.Yes, a big, heavy one to put a lot of pressure on it. Ideally a hydraulic vise.