ridethelightning wrote:how are dealing with airflow inside the frame?
i have a nyx with internal max-e controller, im now trying to sort out some fans to blow the hot air out under the seat post mount area...
Yeah, i do foresee heat build up being a problem. It was hot inside the frame box after doing a twenty minute run yesterday peaking at 78amp 80v. The 18fet lyen controller was very very warm. I have a problem with my cycle analyst at present. It is not limiting the amps. I had to disconnect the green throttle overide wire on the CA to get the bike throttle to work, but this seems to have left me me no limiting features?.
Seeing that 65a is the continuous rating for lyens 18fet i am worried about it getting too hot for sure. i will be investing in an adappto max-e in the near future. Doctorbass has mounted his under the frame with a plastic mudguard covering it but the adappto waterproofing level is a bit iffy. I am just happy to get the bike working at present... That and not breaking any limbs when pulling the throttle.
the green wire on the cav3, and not being able to limit amps rings old bells i really want to forget
that was one of the main reasons i was so quick to get a max-e when they first came on the scene even if it was a bit pricey. never looked back.
Doc's bike is awesome but i like the clean look with the controller inside the frame and not having to worry about mud and crap getting all over the plugs and into the controller.
i took my nyx for a test ride last night, the max-e got real warm in there, ~60C and i diddnt like that.
iv made vents under the front, just behind the steerer tube, but im still to make the vents at the rear under the seat bracket.
i thought about it all day today and came up with using an 80mm fan mounted on a plate that fixes to the alu cross brace in the seat bracket area. ill have to cut the cross peice out first of course, so the fan will sit inside the cavity where the seatpost is mounted,with the alu plate it is mounted to screwed to the alu strengthening peice there.
then ill drill some number of ~8mm holes to make vents under the seatpost, so that the fan sucks air from the batt compartment into the seatpost cavity and then blows it out the holes.
at first i was going to use 40x40mm fans mounted under the seatpost but id have to cut large holes in the frame for that, and those fans will have to be noisy to pull the amount of air required.
the 80mm fan can pull much more air for the same noise and will be muffled slightly as its mounted more internally.
i might try to get some pics up soon.