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View Full Version : I was racing electric scooters on Sunday!



jonescg
19 August 2013, 0608
http://www.youtube.com/watch?v=ER76qsCFSbk&feature=youtu.be

Can't think where else to put this, but Danny Pott and I were racing E-Max 110s scooters at the Wanneroo Kart track. He had about 10 psi more tyre pressure than me, so he got through the turns a bit quicker than me (I get passed at 55 seconds :D

****-ton of fun, and I reckon we can get them to go a fair bit faster without too much trouble. Maybe even using a 15s LiPo battery would work? The controller is limited to 63 V I think - Sevcon gen4.

More photos here:
https://plus.google.com/app/basic/photos/116813190208423637042/album/5913443196460422881/5913443196778691506?cbp=139yu39gjqyar&sview=20&spath=/app/basic/photos/116813190208423637042/album/5913443196460422881&sparm=cbp%3Dk5w0vu6hxb7c%26sview%3D26%26spath%3D/app/basic/116813190208423637042/photos%26sparm%3Dcbp%253D1ow5614ht59l9%2526sview%2 53D25%2526spath%253D/app/basic/116813190208423637042%2526sparm%253Dsource%25253Da pppromo

Athlon
19 August 2013, 0631
with the Lead is very hrd to compete against gas scooter , but if you use Lipo or LifePo4 you can get a lot better perfromace , also you can increase the regen , this allows you to use even smaller battery.

Theregular E-max 110s is thermally limited by the motor , this mean that the motor (2.5 kw cont 4kw peak) will overheat faster than the controller so the best you can do for better performance is to light up the scooter as uch as possible.
14s 25ah Lipo pach can be a very good option for racing.

If you dont want to mess around with battery a regular e-max 120L 54Ah with the Max setting I think will be already on par with the other gas bike in your video.

jonescg
19 August 2013, 0642
The scooters currently have a 60 Ah A123 pack in them. We can get the acceleration but top speed is limited due to the voltage. We even popped the 80 A fuse on the top of the controller!

Athlon
19 August 2013, 0652
the 80A fuse is very limited , Sevcon for a size 2 48v controller allows up to 250A fuse , but I dont think other cables in the E-max will hold this power. On my I have a 125A fuse and everithing looks fine.

Did you already programmed the Sevcon for higher speed?
The sevcon have a conventional working voltage up to 57.6 , but if you remove the overvoltage buffer from the software configuration you can go up to 69.6 , the maximum hardware voltage limit is 79.2 ( page 4-2 sevcon manual Ver. 2013-V3)

I'm not sure if the other components of the E-max can tolerate so high voltages.


For getting a little better speed a common trick is also to use bigger wires out of the motor , but this will void the warranty on the motor.

bjn
19 August 2013, 0656
the 80A fuse is very limited , Sevcon for a size 2 48v controller allows up to 250A fuse , but I dont think other cables in the E-max will hold this power. On my I have a 125A fuse and everithing looks fine.

Did you already programmed the Sevcon for higher speed?
The sevcon have a conventional working voltage up to 57.6 , but if you remove the overvoltage buffer from the software configuration you can go up to 69.6 , the maximum hardware voltage limit is 79.2 ( page 4-2 sevcon manual Ver. 2013-V3)

I'm not sure if the other components of the E-max can tolerate so high voltages.


For getting a little better speed a common trick is also to use bigger wires out of the motor , but this will void the warranty on the motor.

Interesting. So they use 100V FETs on a 48V controller?

Athlon
19 August 2013, 0656
this is my E-max , 16x 100Ah GBS pack http://www.elmoto.net/showthread.php?2046-72-volt-60ah-GBS-Battery-pack-question&p=26543#post26543

http://www.elmoto.net/attachment.php?attachmentid=2756&d=1330088601

battery cables are flexible 25mm2