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How do I control this motor? (speed) wise? Answered

I am making a go kart, to be converted to a lunar rover for a carnival.
I am about To purchase to 350w 24v dc motors (geared down of course) But how to I control them?
After looking at 'how to build an electric racing car' Instructable I found that there solution to the problem was to use a heavy duty push switch..
I was thinking that this would be a bit frantic and stoping and starting a whole drive system could do some damage.

I found this.. But how do i use it ? I dont really understand it? I am ringing the company up this week as they seem to have all of the drive systems bits I need.

I would really like any suggestions on other ways to my solution.

Thanks

Oscar

10 Replies

user
The IdeanatorBest Answer (author)2010-04-24

What are your specific goals?
Variable speed, power saving, speedometer,

As for the motor controller box you mentioned, it probably will suck (I'd recommend a kelly motor controller). You get what you pay for, so caveat emptor.

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user

Im really looking for vairable speed. Not so much power.

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user

Hi Oscar.

You have to have the ability to handle what the motor will demand, especially if its stalled.

You could try 4QD www.4qd.co.uk/prod/uni.html

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user

Yes, 16 USD for the whole thing is suspiciously cheap

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user

We got one for around 70 USD for a school project and we had more than a few problems with it. That project, btw, won half of the first place awards.

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user
steveastrouk (author)2010-04-24

How many motors are you  running ? you say "motorS"
You're right, you need speed control. In fact, if that unit is clever, it will regenerate and charge the battery when you stop.
Steve

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user

I am running 2, 350w 24v DC motors.

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user

You need 15 A  each then. I suggest Dimension's 2 channel controller. They really are bomb proof, and aren't made in some Chinese sweatshop

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user
gmxx (author)2010-04-24

 You need speed controllers. look at the speed controlelrs used for electric wheelchairs or battlebots.

I have used the Victor888 speed controllers, and they work well. they need a pwm booster cable however.

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user
amando96 (author)2010-04-24

 you wil need throttle control, for that to work, sometimes it's just a potentiometer, the datasheet will say what resistance, but i had on that worked with a hall effect sensor...
it will also have connections for lights, and blinkers...
that will only be able to drive ONE motor, and only forwards, no reverse.

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