Carving up the mean streets of Palmy!
Any interest from the cops?
I'm aiming to use mine as a commute option.....
No interest from cops yet. But in saying that I only use it on cycle ways and quiet back streets.
Pediglide wrote:Hobbywing Xerun 150A. Very dependable and still runs strong after 3 years.
I've also recently been testing the SkyRC toro 150A. Bluetooth connection is sweet, if you get past the bugs.
Adjustable throttle and braking curves is a must for me.
Thanks for the tip, I'll look into this
Jan Christian wrote:Your escs is probably blowing up because you dont have any reduction on the motor. Then the esc have to compensate by using more amps to get the torque. These small rc escs is not made for longer periods with high amp draw. I also smoke them with reduction but thats in longer periods with acceleration/brake/acceleration/brake.
With your hub motors you are maybe limited to 6S unless you want to gear it for world guinnes record.
Speed fully charged 6S: (145KV*4,2V*6S)RPM *(1/60) *pi*0,092 *3,6=63,4 km/h
Speed fully charged 10S: (145KV*4,2V*10S)RPM *(1/60) *pi*0,092 *3,6=105,6 km/h
My impression on the vesc is that you need to run 10S or 12S to get maximum out of the esc without the thermal protection kicking in. Then you would need lower kv motors.
All good points, thanks. I know that having it 'geared' to go 60km/hr on a 6S battery is quite demanding on the ESC. What sort of speeds are others aiming for when selecting gear ratios for a 6S system?
You're definitely right about the VESC, with the 60V FETS, 1.5mOhm Ron it is better suited for higher voltages to get full power.. Could always swap the FETS for AUIRFS8409-7P which are 40V, 0.55mOhm Ron. That adds more cost though.
Just a note: the wheels are ‘stretched’ slightly around the motors to get a tight fit. I think they ended up being 96mm diameter.
onloop wrote:Sweet build....
Not many folks on here have done a DIY eboard with hub motors...so your one of few congrats.... but we need pics for it to be legit...
I think you need to go near 100kv. And also higher voltage Would be better.
60kms is crazy... did you ever ride this fast? Or mostly ride at half throttle.... ? Vedder was saying about riding at half throttle can increase motor current. Vs riding full throttle...
you need a solid ESC.
I can get you a vesc delivered to your door for about $133usd. Or approx $178NZD... so slightly cheaper than you think.. Its about $120USD ea.
Fail, I completely forgot to take photos last night. Too busy working on my e-bike project. Try again tonight. Seem I've got lots of video backed up on my work computer. If you pause at the right time you might see the hub motors lol.
Higher voltage, lower current would be ideal. Doing a motor re-wind for lower kv and running higher voltage is another option.
60km/h is only on nice quiet, flat road. most of the time I'll just be cruising at 30-40 km/h.
Thanks for the offer, that sweetens the deal a bit
I don't suppose you would consider making a version of this ESC using AUIRFS8409-7P FETs?
I think they would work really well for lower voltage, It should run a lot cooler and so higher current limit. Cheaper too.