Hi All,
I have been lurking ES for a while now, but finally decided to join and am thinking of getting a portable scooter build going. The background is basically that I have ridden close to 1000 km on my [commercially available] electric kick scooter, and while it is a quite reliable work horse it is rather heavy to carry (11 kg) and is not really a blast to ride neither is it really comfortable.
Checking what the new electric longboards can achieve as well as doing some rough calculations, it seems pretty feasible to DIY something that is an improvement. However, I have not found something really lightweight when checking the other build threads so I like to run this with you guys before pressing the button.
So my design goals is something like:
Weight: 7-8 kg
Max speed: 30 km/h
Range: 15 km
Other: 7-8 inch air tires
How do I plan to achieve this then?
Batteries: 11s1p 26650 cells. There are 3500mA cells with 20 A continuous discharge, so that should be more than enough.
Motor: I’m assuming that the best weight vs torque ratio comes from RC style outrunners with belt drive. Perhaps Alien drive 6354 (60 kV); for a max speed of around 30 km/h it should need a 1:2.5 reduction ratio at 11s.
Controller choice seems to be pretty obvious; the VESC.
So my questions are:
1. Does this seem like a reasonable starting point?
2. About the motor choice, is there a point in choosing higher kV and larger reduction on the belt?
3. How is the general reliability of outrunners for this kind of application? Varies with price like everything else? Any recommendations?
BRs
I have been lurking ES for a while now, but finally decided to join and am thinking of getting a portable scooter build going. The background is basically that I have ridden close to 1000 km on my [commercially available] electric kick scooter, and while it is a quite reliable work horse it is rather heavy to carry (11 kg) and is not really a blast to ride neither is it really comfortable.
Checking what the new electric longboards can achieve as well as doing some rough calculations, it seems pretty feasible to DIY something that is an improvement. However, I have not found something really lightweight when checking the other build threads so I like to run this with you guys before pressing the button.
So my design goals is something like:
Weight: 7-8 kg
Max speed: 30 km/h
Range: 15 km
Other: 7-8 inch air tires
How do I plan to achieve this then?
Batteries: 11s1p 26650 cells. There are 3500mA cells with 20 A continuous discharge, so that should be more than enough.
Motor: I’m assuming that the best weight vs torque ratio comes from RC style outrunners with belt drive. Perhaps Alien drive 6354 (60 kV); for a max speed of around 30 km/h it should need a 1:2.5 reduction ratio at 11s.
Controller choice seems to be pretty obvious; the VESC.
So my questions are:
1. Does this seem like a reasonable starting point?
2. About the motor choice, is there a point in choosing higher kV and larger reduction on the belt?
3. How is the general reliability of outrunners for this kind of application? Varies with price like everything else? Any recommendations?
BRs