DIY Electric Car Forums banner

1 - 5 of 5 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
Hi guys,

I'm currently in the process of designing an electric buggy. From scratch!

My main issue is motor and power.

Its designed to carry 2 people and made of steel in the chassis.

I am thinking a 20 to 30kw brushless DC motor equaling to about 25 to 40HP

Using a rack and pinion steering system

Is this a good size motor and what would I use to supply the power? I know batteries
Etc but how many and what size?

Any help is appreciated!
 

·
Registered
Joined
·
370 Posts
You need enough batteries to supply the voltage and range you need.

For instance a lithium Iron phosphate battery is 3.38 volts fully charged so if your motor runs on 144 volts then you need 44 batteries or so to get the voltage and then you have to calculate range. Take the weight of the vehicle and divide by ten and that will give you a rough watt hours per mile number.

I have a 21 kW motor in my celica. It weighs 3100 lbs with me in it. It gets on average 310 watt hours per mile. I have 44 liFePO4 batteries 100 ah each. 44 times 3.38 times 100 ah is about 14 kW divide by 310 and it goes on average 40 miles per charge.

Doing this from memory so numbers are not exact
 

·
Registered
Joined
·
1 Posts
I have a GE CM77 motor starter generator which could power your project.
It is rated at 30vdc, 400 amps at 3-8,000 rpm weighs near 100 lbs.
Let me know if you are interested?
Willing to donate to your project for a very reasonable price.
Bill
[email protected]
 
1 - 5 of 5 Posts
Top