# 2- 24V DC motors for "Burning Man" project

R

#### Roger Grubb

Hi,
I'm building a steel framed "Art Vehicle" for a week-long festival in the high sierra desert.

The vehicle I'm building right now has two 1HP 24V motors. The challenge is that I have no idea how to control the speed.

I do know how to put two 12V batteries in series to make 24V but at that point I'm left in "Lostville". =-(

Does anyone know where either I can buy something that will do the job or even a schematic I can follow to get this puppy rolling?

Roger
http://www.grubbenterprises.com/burningman

T

#### Todd

Check out the following link... it's a pretty good tutorial on DC motors.

http://www.4qd.co.uk/faq/index.html
You're correct w/ wanting to connect the 2 +12V batt. in series. Keep in mind that you want a good battery. For a 1hp +24V DC motor you will be pulling 31 Amps from each battery. For a 30 Ampere-Hour battery, you will only be able to run for an hour. I would definitely look into buying an off-the-shelf controller if you are looking to control the speed. Good Luck!

D

#### David Wooden

Check out Vantec, http://www.vantec.com . This is the controller of choice for many BattleBots.

HTH,

David Wooden
Senior Software Engineer, Systems Integration
Automation and Enterprise Solutions Group
TAS Division of Omron Electronics LLC

M

#### Matt

I hope you got it going for BM! If not, I have just what you need for super cheap. I wanted to go to BM this year but got sick. I also have some project ideas for next year. Let me know how it went or if I can help.
~Matt

G

#### Geoff Niggeler

I am an engineering student at the University of Denver researching motors for a design project.
My I ask where you found 1hp 24V DC motors
That is exactly what we are looking for and I haven't been able to find a suitable solution to our problem.

Thanks
Geoff
University of Denver
Dept. of Mechanical Engineering
Chariman FIRST robotics
[email protected]

R

#### [email protected]

It was great.....

Roger

R

#### rphillips

I don't know if anyone ever replied to you or not. I assume you have found what you need by now but in case you haven't, I ran across a
company selling replacement parts for electric scooters -- that subject will get you to drives, controllers, motors, batteries, etc. Here
is the

I found both control.com and rad2go by accident just tonight while trying to get a replacement drive belt for my daughter's xmas present
scooter.

bob phillips
CAD software developer (more \$)
(ex-electrical designer)

[email protected]

A

#### Anonymous

Correction: 30 Ampere-Hour battery does not mean 30 Amps for 1 hour. It's a measure of capacity often using a 20 Hour discharge period. So a 30AH battery is 20 Hours at 1.5Amps. The acutal discharge curves will depend on the battery chemistry.