I just punched in 1:1 gear values trying to make sense of it all. Figured I was way off the mark. Comprehension is a bit lacking with all the other values in the mix.
Still learning bit by bit.
I just punched in 1:1 gear values trying to make sense of it all. Figured I was way off the mark. Comprehension is a bit lacking with all the other values in the mix.
Still learning bit by bit.
Get with @Lunasi, sheās been riding them for a while, 75kv 12s if Iām not mistaken. Need to try these beasts myself!
Keep in mind that since direct drive is more efficient than, say, a belt drive, you should bump the efficiency in the calculator a bit higher
12S4P we seem to get about 25-30 mile range typically.
Depends on your definition of efficiency. Per volt, a belt drive motor will produce more torque than a direct drive. Not that I like belt drive. Just that by putting a higher kv motor under gear reduction, you can achieve more torque per volt. I would assume based on that, a belt drive would get better efficiency.
Per amp ffgfdcv
+1
you donāt want to know how many miles Iām getting with 12s5p on the raptors. Efficiency in hilly SF is terrible.
Oh but i do. Ill ssk ya in person if i can ever make it to some dang group ridesā¦
I was doing about 20 miles on my 12s4p with a belt setup before, Iām getting roughly the same on the direct drive, if not a bit more. I find that you use a bit less energy than a belt drive, the 1:1 gear ratio means you get a really true roll like on a regular longboard. If you let go of your remote you donāt feel yourself lose speed like on a belt drive, the extra tension in the belt drive actually costs more energy. Iād reckon I can get a few extra miles on the directs versus my belts, but Iād say they pretty closely compete.
FYI: Iām a fast rider so a slower rider would probably get more range than me
Oh and for the 35mph Dexter mentioned, keep in mind thatās based on the current beta motors which are wound as 6355ās when the final product will be wound for 6374. You might be able to get a bit more speed on the final product IMO than the current beta drives. Iām running on torqueboards vescs, torqueboards 12s4p 30q, sensorless, BLDC.
Sweet. Thanks for the explanation, makes a bit more sense. Great to hear the range is pretty good also.
Any difference to running these in FOC vs BLDC?
I hadnāt had a chance to run them in FOC but @skatardude10 will probably run them like that when I give them to him to test, sure heāll give you feedback on it.
Coasting drag will be better on hubs. obv. However ,theyāll have greater losses uphill and on quickstarts. Havnāt done the math but Iād say it depends on where youāre rididing regarding total efficiency.
I would say that coasting depends more on the motor magnet-rating and size. My 5055s coast better (HTD3 belt with idler) than one single small hub motor I got.
Iād say that either your beltdrive is super good or that hubmotor is super shite then xD
could be ;), I got 2 different 70mm hubmotors (the one form maytech coasts better, but its not perfect). I still think that magnets play a big difference, I mean, both are still PMSM outrunner motorsā¦
Sure, there are many variables. The fair comparision would be if the size of the motors were atleast similiar and 5055 hubs wouldnāt be very viable in the real world. But if you had a pair, theyād prob coast better then the belt setup
yeah, sure, the belt stil adds some drag, even with an idler and aligned correctly
I want to know how many mile you get with your 12s5P!!
Still one month to wait I canāt anymore, ha ha
@Lunasi has been running these in FOC for a little bit, short answer from my perspective, they sound equivalent to well tuned belt motors on FOC when running BLDC, and when running FOC on the unity, these sound like a feather in the wind. Itās kind of scary!