View Single Post
Old 09-10-2012, 01:29 PM   #12 (permalink)
rmay635703
home of the odd vehicles
 
rmay635703's Avatar
 
Join Date: Jun 2008
Location: Somewhere in WI
Posts: 3,882

Silver - '10 Chevy Cobalt XFE
Thanks: 500
Thanked 865 Times in 652 Posts
Quote:
Originally Posted by Daox View Post
I was talking with Darin the other day about this and I think we got it figured out. But, if someone is sure or can explain it better it would be great.

So, your battery amps are 5000W / 100V = 50A. So the motor is seeing 100A but the battery pack is only seeing 50A.

Is this correct?

edit: added pwm controller info
PWM causes a lot of strangeness in the real world so we will ignore it.

On my 48v car I can typically get up to 30mph @ 65amps or so (summer)

If I were to peg the car to make the motor have 24v (whatever that takes as PWM percentages don't really match directly to a neat voltage realationship on most motors)
I would end up driving about 16-18mph at about half the amps.

Real world this is what I observe battery side, my guess (and its probably right) is in my circumstance the motor amps are also slightly reduced because the aero loss is less.

Cheers
Ryan
  Reply With Quote