[E_vehicle_crazy]

Hi I have a question about determining the hp or kw and toque I will need to run my 7000lbs project truck.

I have read lots of articles that give me some good information but I can’t seem to put all the pieces together properly and make it work out.

I can determine the rpm I need the drive shaft and motor to turn to maintain the highway speed with the gear ratios and tire size. I have gone through the hp Formulas and the Rolling Resistance. The problem I am having is determining the hp and torque needed to a speed of say 100kph and the extra hp and torque to bring it up to speed. I just can’t seem to put it all together properly.

If anyone can help or point me in the right direction it would be greatly appreciated.

Thanks for your time.

[Ivansgarage]

I went over to topeka electric motor last week and went for a ride in Kevins truck (full size pickup) this truck runns like it had a v8 in it..

Unbeleivable, runs perfect, cant say enought about this truck.

And best of all, this truck is proof you DON'T need 2000 amps and 300+ volts...

check out these links..
this is the motor and controller in the truck
http://electriccarinternational.com/...Engines-AC.php

Here is the link to the truck. Topeka Electric Motor
http://topekaelectricmotor.com/elect...les/ac-project


IvansGarage 1999 electric sonoma
http://ivanbennett.com/

[mizlplix]

Come on, Ivan. Dont hold back. Tell us a little more...

Miz

[Ivansgarage]

Originally Posted by mizlplix

Come on, Ivan. Dont hold back. Tell us a little more...

Miz

Well Miz all i can say is i am working on a ac motor 3phase about 15hp
225lbs water cooled. Don't have the finall numbers yet on hp and torque
after the rewind.

Ivan

[ruckus]

Hello,
This page is very helpful:
http://ecomodder.com/forum/tool-aero...resistance.php

You can add hills, headwind, and parasitic loads to get a "real" number. Rounding down will only result in a system that under-performs, so I recommend rounding up. You will have losses in the controller and motor and so should figure an addition 10-20%.

Cheers