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can i use 1 speed controller (24v 350w) for x2 24v 350w motors????its for a electric cart? Answered

im looking to build a electric cart with two 24v 350w motors but im wondering if i can use just one speed controller for it, the speed controller is 24v 350w

thanks 
james

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steveastrouk (author)2010-06-08

Steve said in Series Steve

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Re-design (author)steveastrouk2010-06-08

I'm just trying to sabotage your suggestion! Trying to do too many things at once, well two things anyway.

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jbutcher05 (author)Re-design2010-06-08
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Re-design (author)jbutcher052010-06-09

I was being sarcastic to cover up for my mistake. And I think Steve knows that.  And I also deleted my incorrect answer.

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jbutcher05 (author)Re-design2010-06-09

so you gonna give me a proper answer????

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Re-design (author)jbutcher052010-06-09

I've given you two and Steve has given you one. Use a 48 volt 350 watt controller and wire the motors in SERIES per Steve's answer. OR Use a 24 volt 700 watt controller and wire the motors in PARALLEL per my suggestion. Or add some high power transistors that will handle 800 watts at 24 volts and control it with one 24 volt 350 watt controller. No I don't have a circuit I'd have to do some research on that first.

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jbutcher05 (author)Re-design2010-06-10

but could i have 2 controllers for 2 motors? and put the throttle and batteries in parrallel with the 2 speed controllers

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Re-design (author)jbutcher052010-06-10

Both motors and controllers can take their power from the same batteries.

But I don't know how you're controlling the controllers.  Are you building an rc robot if so then each controller should plug into a different channel.

If it a mechanical connection then you just connect both controllers to the same gas pedal.

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jbutcher05 (author)Re-design2010-06-10

its for an electric go-kart. with 2 12 volt batteries in series, thanks

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Re-design (author)Re-design2010-06-10


There is a good article in Make Magazine #22 starting on page #42. 

Here's a link that has some schematics not included in the article.

ANd a video of the lawnbot.

ANd more videos.

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gmxx (author)2010-06-08

NO. Power wise, the controller should be rated for the current draw of the two motors. The problem is that EMF from the motors tends to fry seed controllers when 2 or more motors are hooked up to a single ESC. I have had this problem in the past.

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jbutcher05 (author)2010-06-08

so your saying i can use one 24v 350w speed controller for 2 350w 24v motors as long as they are in parallel??

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Re-design (author)jbutcher052010-06-08

No. you need a 24 v 700watt controller for parallel.

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jbutcher05 (author)2010-06-08

so could i use a bigger speed controller say a 48v 800w???? thanks

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Re-design (author)jbutcher052010-06-08

How about just using a 24 volt 700 watt controller and run the motors in parallel?

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jbutcher05 (author)Re-design2010-06-08

i cant seem to find one of them its only a 48 volt 800w controller would that do???

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steveastrouk (author)jbutcher052010-06-08

Only if you are using both motors in series . Steve

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lemonie (author)2010-06-08

If you ran them in series, you'd only get ~half the 700W. But if you want the full 700, you need another controller, either another of the same or one designed for 700W+ L

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Re-design (author)2010-06-08

No. It's meant to control 1 motor. Controlling 2 would make it work twice as hard as it is designed to. There is probably a way to add transistors to it to increase the power rating but I'd have to research how exactly to do that.

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