Prototype EV for race

General Discussion about large electric scooters and motorcycles and other things with no pedals.

Prototype EV for race

Postby Solexelec » Wed May 17, 2017 7:01 am

Hello

my name is Sylvain
I'm live in France

I create and I'm developing EV for race competition
the EV is like a moped but the motor is placed on the front rear and traction was diectly onthe tyre.

vue ensemble 2 disjoncté version1.jpg
vue ensemble 2 disjoncté version1.jpg (147.78 KiB) Viewed 271 times


vue ensemble disjoncté Version 1.jpg
vue ensemble disjoncté Version 1.jpg (151.85 KiB) Viewed 271 times


The part cycle was in steel
the weight 70kg and with the pilot i arrived at 130kg ( 260lbs)

For the motor

battery pack: Kokam Lipo 7S 24v 200AH
controller: KLS-S 6035 350A peak and 150A cont.
motor 80100 350KV with pcb sensor hall 120°
I'm using demultiplication 1,07

theorie Vmax 71km/h

I have a race this sunday (6 hours race) like 24h du Mans

At the first time i drive with 60% current limit on the controller ( 210a) near the current peak motor)
result the wire burn!!!!!!

for the race i change motor and choose 40% current limit on the kelly ( 140a)

result no burn great news

motor temp 48°C
amp in use 110A during 3min after 1min under 86a
the current shut down when arrived at 60km/h

but i haven't good acceleration and on out of turn when i wan't to accelerate the motor accelerate slowly.

For more performance I have two idears
bigger motor because i work under 24v and i need more robust motor i need 6KW power that why i need 250a peak
and high speed motor 12000 rpm
i look about TP100 motor at 540Kv
and i looking about maytech motor D108 320KV

Can you have some data about this motors or experience
i don't find informations with search here

thanks for you help

and sorry for my english.
Solexelec
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Re: Prototype EV for race

Postby Boulter EV » Wed May 17, 2017 3:51 pm

Hello, welcome to the forum. What interesting machine! What is the race?

Is there a reason you're limited to 24v? The easiest thing to do might be to increase voltage and change the gear ratio? I'm sure if your motor is rated at 24v it'd be ok at 36 or even 48.....
Boulter EV
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Re: Prototype EV for race

Postby cheapcookie » Tue Jun 06, 2017 2:51 am

Yes I don't under stand are you limited in voltage somehow ?
cheapcookie
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Re: Prototype EV for race

Postby Solexelec » Tue Jun 20, 2017 3:44 pm

Hello
i'm want to stay in 24v because i find some Kokam cell 200ah and for the race i need lot of energy for drive during 1h continue

i run this sunday 6h race we used three pack of 24v 200Ah and we finished 2nd Scratch it's amazing we are very happy and now we need to drive fast very faster...

I have two ideas to win 10 or 15kph
first rewind 80100 motor

second buy an TP100 motor
Solexelec
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Posts: 5
Joined: Fri Mar 17, 2017 2:40 am

Re: Prototype EV for race

Postby Solexelec » Tue Jun 20, 2017 3:46 pm

Cheapcookie you are in France me to. I live near Besançon.
Solexelec
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Re: Prototype EV for race

Postby billvon » Tue Jun 20, 2017 3:59 pm

Solexelec wrote:Hello i'm want to stay in 24v because i find some Kokam cell 200ah and for the race i need lot of energy for drive during 1h continue

So put 2 in series.
i run this sunday 6h race we used three pack of 24v 200Ah and we finished 2nd Scratch it's amazing we are very happy and now we need to drive fast very faster...

You are likely going to have to change from friction to direct drive. Friction drives are inefficient and power-limited.
--bill von
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Re: Prototype EV for race

Postby Solexelec » Wed Jun 21, 2017 10:49 am

hi billvon
my battery pack weight 30kg if i build in serie..... 60kg
i can't put this on the EV...
Solexelec
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Joined: Fri Mar 17, 2017 2:40 am

Re: Prototype EV for race

Postby billvon » Wed Jun 21, 2017 12:04 pm

Solexelec wrote:hi billvon
my battery pack weight 30kg if i build in serie..... 60kg
i can't put this on the EV...

Then rewire for 48 volt. You will increase power (and speed) and decrease weight (and thus extend range.) Or change batteries. If you are serious about racing, "well, I have this really cheap . . . " is never a valid excuse.

Note that your batteries are giving you about 160 wh/kg. You can do much better. That means if you went to better batteries you could get more power with less weight. Using Lunacycle 52V packs, for example, you could get 52 volts, 120 amp hours (considerably more energy than you have now) for 27kg.
--bill von
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