SplinterOz
1 kW
I have been getting this build ready for a while now but have left starting this thread until I was at the interesting bits.
I picked up the donor bike around April 2010, with all fairings but no motor etc. The 12volt wiring was shot and some damage to the fairings but all in all a good find for 400AUD.
After cleaning up and reconditioning the brakes, bearings and front forks the bike was ready for me to do some calculations and planning.
The bike is going to be used for my regular commute, about 35Km (round trip) on 80Km/h roads. I was aiming for 70Km range and a top speed around 100km/h on the flat.
So I thought I would need a good motor and around 4kw/hrs of battery pack.
Just around that time some guys in Croatia decided to build a new motor.... http://endless-sphere.com/forums/viewtopic.php?f=30&t=16728
and I jumped on board and grab one of the prototypes.
Electric Motor by Splinter, on Flickr
[youtube]yk817U0Asig[/youtube]
Noting the motor was drawing a little too much no-load current (a small issue on the prototype I got) toolman2 and I looked around for a solution.
Low and behold Burtie was working on a hall timing adjuster.. http://endless-sphere.com/forums/viewtopic.php?f=2&t=19054
Again I got a prototype and got the motor running....
[youtube]rUwjLzmNWR0[/youtube]
The motor has some specs like this....
79Kv
0.124nM/amp
0.0088 ohms resistance
Peak Efficiency at 218 amp and 76 volts
Therefore 16.6kW continous
95.0% efficiency.
The controller I am using is a 24 mosfet controller built by stevo.. http://endless-sphere.com/forums/viewtopic.php?f=2&t=14798.
I have bought 144 Headway 38140 10ah cells to build a 24S6P pack for the bike, however I think I will only be able to fit 24S5P in the frame.
More to come.......
I picked up the donor bike around April 2010, with all fairings but no motor etc. The 12volt wiring was shot and some damage to the fairings but all in all a good find for 400AUD.
After cleaning up and reconditioning the brakes, bearings and front forks the bike was ready for me to do some calculations and planning.
The bike is going to be used for my regular commute, about 35Km (round trip) on 80Km/h roads. I was aiming for 70Km range and a top speed around 100km/h on the flat.
So I thought I would need a good motor and around 4kw/hrs of battery pack.
Just around that time some guys in Croatia decided to build a new motor.... http://endless-sphere.com/forums/viewtopic.php?f=30&t=16728
and I jumped on board and grab one of the prototypes.
Electric Motor by Splinter, on Flickr
[youtube]yk817U0Asig[/youtube]
Noting the motor was drawing a little too much no-load current (a small issue on the prototype I got) toolman2 and I looked around for a solution.
Low and behold Burtie was working on a hall timing adjuster.. http://endless-sphere.com/forums/viewtopic.php?f=2&t=19054
Again I got a prototype and got the motor running....
[youtube]rUwjLzmNWR0[/youtube]
The motor has some specs like this....
79Kv
0.124nM/amp
0.0088 ohms resistance
Peak Efficiency at 218 amp and 76 volts
Therefore 16.6kW continous
95.0% efficiency.
The controller I am using is a 24 mosfet controller built by stevo.. http://endless-sphere.com/forums/viewtopic.php?f=2&t=14798.
I have bought 144 Headway 38140 10ah cells to build a 24S6P pack for the bike, however I think I will only be able to fit 24S5P in the frame.
More to come.......