Team Lazy Gecko

Update: I did successfully run a weekend on 8S with one of these. I used a DC-DC boost converter on the "key" (logic power) line, and it worked fine. I got some super sketchy ones from Amazon that required reflowing to get the inductor attached (would not recommend). Anything that gets you...

EDIT (again): I think this actually does work. The controller I tried it on has other problems (it appears to fail self-learning hall settings). Haven't actually tried it though, so who knows. EDIT: None of this actually works. :oops: You end up with a speed controller which will spin wheels in the ...

Fun fact: when people say "trapezoidal commutation", they commonly mean at least four different things. I just now finally convinced myself people really do talk about using all four (not sure whether they actually use all of them in controllers), and also that there are in fact four and n...

I think the smoothness of the data here is all measurement noise. The T20 looks better because it's a nicer scope, measured at a higher frequency , and spinning faster so the noise is a smaller percentage. Plus I just realized I screwed up my data analysis and the T20 data is artificially quantized ...

I made it about halfway through the datasheet for the MCU on the China controller. It has a timer (independent of the hardware driving FETs) which supports capturing input pulse widths on three channels, which makes for a nice communications channel if the correct pins are accessible. Specifically ...

Turnigy Aquastar T20 Dug up data from the T20 too. All my data is with it in Y (slower) configuration. https://hobbyking.com/en_us/turnigy-aquastar-t20-3t-730kv-1280kv-water-cooled-brushless-motor.html?___store=en_us is the canonical location for finding it. From the outside, with water cooling jac...

I've had lots of discussions with various people about what motor and/or controller is "more efficient", and left most of them realizing I don't really know what that means. There are lots of reasonable-sounding ways to compare these things, so even deciding which one is interesting is har...

The ones Aren ordered showed up, and they're completely different from that ES thread you linked with pictures of some controller. On the plus side, this one looks way easier to program (labelled JTAG connections). However, that means all the stuff about current setpoint tweaking via resistors is in...

And here's data for the other motor which Aren bought. 1800W MY 1020 This is what the nameplate looks like: my 1020 nameplate.jpg Views from the outside: my 1020 outside back.jpg my 1020 outside front.jpg Views inside it: my 1020 inside back.jpg my 1020 inside front.jpg The rotor: my 1020 rotor end....

I collected data on two of these motors. It should all be fairly precise, but no promises. They're both basically identical on outside dimensions. Second motor is coming in a second post, because apparently I have too many pictures for one post... 1600W BOMA This is what the nameplate looks like: bo...