So I got one of these knowing it was a bit crap, thinking I could hot it up with a few bits ordered off the web. It has a 540 style 120W 22.2V motor (what a PITA figuring out how to get to it that was) which should be fairly easy to replace with a 3650 brushless job, if I can manage to remove the impeller without damaging it (seems to be a press fit).
My intention is to grab a battery clip to suit my DeWalt stuff, taking it down to 5s, so I’m trying to figure out the kV and number of turns I’m after, to get the power up to like 250-300W. I found this page: https://blog.ampow.com/amp/rc-brushless-motor-size-chart-choose-the-best/ but it doesn’t seem to completely make sense, with kV ratings in columns headed ‘speed’…
The other piece of the puzzle is a suitable controller. I’d imagine a sensorless motor would be fine for this application (although curious what happens when the rpm wants to soar when suction is blocked), and a very basic controller that only switches between two or three speeds if at all would do, but I have no idea what to search for. Seems I’d want to nail down the motor spec first anyway…
What sort of controller would be suitable? An RC ESC seems a bit OTT… what else is available at this power level, any idea?
Cheers