If you look into e-mtbing a ton of people recommend motors from 130-170kV.
Wouldnāt say that higher kV is the trend people go.
A lot depends on your needs and your build in general.
Also gearing up/down is also limited by wheel diameter. If I think about a 8ā pneumatic wheel I have already clearance issues with 72th wheel pulley. To go more high would make the belt rub on the street
Same with motor pulley. Below 13th the contact of the belt is just too less.
Okay I was meant to be asleep an hour ago but just got finished reading both of those topics (would have been done sooner if I didnāt have to workā¦)
Still doesnāt really cover off what Iām trying to find. I would probably be surprised if someone has done it but something like a dyno sheet comparing
190KV motor, 10s with 15/36 gearing vs 100KV motor, 10s with 28/36 gearing
Theoretically they probably have the same output but my guess is there would be a difference.
Like stick a 100kg / 220lb rider on and have them go from a stand still up a slight hill, would the lower KV motor have more punch off the line to mid and the higher KV one have more in the top end ?
The main problem is getting a huge 28 tooth pulley mounted to a wheel. The standard belt spacing determines the tooth size. If you add more teeth, itās not shrinking the teeth to fit the pulley, itās expanding the pulley to accommodate the teeth.
Another question, is my understanding of the different motor types correct?
Belt driven motors
This is the standard. It can be a little complicated to work out the drivetrain. Overall is this a safe choice.
Hub motors
Newer type of motors. Are generally cheaper, but a lot less powerfull than other options.
Direct drive motors
Newest type of motors. The best, but also the most expensive type. Basically a mix of hub and belt motors, the belt is gone, but the motor is not inside the wheel.
I want to build a pretty stealthy board, so it looks like a normal skateboard if you donāt pay attention. Iām planning on using a HAYA board, so the internals will be hidden. To get the stealthy look I have to use direct drive or hub motors, but as I understand it belt driven fits the best. Hub motors are not really powerful enough, and direct drive makes my board over budget (if i use this motor set, compared to this kit + 2 motors of 80,- a piece).
Is this correct, or am I missing something? Are the hub motors really that much worst? Or are there more budget friendly direct drive motors out there?
The rest of my wishes still apply:
I would be willing to save up a month more, if the increased budget will improve my board significantlyā¦
Iām sorry in advance if I ask a lot of questions, I will ask more :). I just want to do this right the first time.
A majority of the hub motors that are available are cheap shitty ones the exceptions are hummie hubs probably the raptor hubs as well. There is also gear drive systems out there from @3DServisas and they are based in EU so more accessible for you.
How wide of a belt is needed for a HDT 3M belt to transfer 700W? Its a brushed DC motor so it wonāt have much torque anyway
On the current setup Iāve got 15mm from the wheel to the mount, so the best I can do is probably 1mm for each pulley guard and 1mm for clearance (each for belt to guard and guard to mount), so 11mm belt?
They are low-quality and donāt have sensors. But they are functional. I donāt like them not having wires coming out for the phase leads. The windings are just extended outside the motor, there is no termination inside.
I mean Iām personally running dual chained maytechs and a 12s4p 30q pack but this is my friendās first board and he wants the process but not the cost, weāre looking for 7mi range and maybe 18mph top speed with low acceleration and itās basically flat here
Iām getting 18mph out of a single 350W hub motor in this place
I just wanna know if it will work worth a KEDA motor, do they have the reliability to go a few miles a day every day in nice conditions and low load or do they fall apart anyway?