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  1. L

    Sanity check: outrunner with large no-load current, low inductance

    Hey all, this is just a quick sanity check to make sure that I haven't made some obvious mistake. I have a 12090 140kv outrunner (28-poles) I am planning to use for an electric outboard rebuild. What I've found so far (that I didn't expect) is: - Running unloaded at a pack voltage of 40V...
  2. L

    Yet another homebrew BMS: functionally simple, modular, displays cell voltage

    So for a few different projects I've been working on I eventually caved in and made yet another homebrew BMS. IMO it turned out pretty well (i.e. works for me and no battery fires to date), and someone else here might also have a use for it. Unlike most BMSs I've seen so far, this one; Is...
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    Suggest motor for ~3kW cont, 4-6kRPM, 100A

    I'm currently in the process of an electric retrofit of small outboard engine. So far I've used a small hobby-type PMSM (~8kRPM, 3NM), but I've found that it's a little too underpowered and a 3:1 transmission stage I built had more losses than I could afford (~300W). Because of these reasons...
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