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Old 20th January 2006, 10:41 AM   #1
Hayden is offline Hayden  Australia
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Default 200 amp speed controller

Iíve got a speed controller from a radio controlled car that will do up to 200 amps @ 7-12v its perfect for what I want (size, rating etc) what I need to now is how to run it, what does the receiver put out to tell the speed controller what to do? Is it a pulse width modulated or is it digital?

Thanks in advance
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Old 26th January 2006, 05:33 PM   #2
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hi
http://www.rcgroups.com/forums/forumdisplay.php?f=13

this is a great forum for any questions in RC stuff

best wishes
j7
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Old 26th January 2006, 09:02 PM   #3
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Hi,

RC speed controllers are driven de same way as servoís and yes that is a PWM signal. You can buy so called servo testers for not so much at a RC-Shop. You can use these for controlling the speed controller as well. But they are not very accurate IMO.

Cheers
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Old 26th January 2006, 10:14 PM   #4
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Ive had that idea too- having used to be into RC touring cars- however, the electronic type speed controllers seem to work by turning the power off and on really quickly, and at low speeds the motors are rather jerky. I had an MRT Vtrac, which at the time was one of the smoothest speed controllers available, and even that made the motor cog severely at low speeds as it turned the power on and off. Might be worth a try though, it could work really well.
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Old 27th January 2006, 11:09 AM   #5
Hayden is offline Hayden  Australia
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Dead right I tested it on a scope. Is there anyway of making a little device with a pot to adjust the pw to control the speed controller?

Or the other option is to make the correct controller for the motor, itís a fusion phase 3 10x2 it draws 100 amps on the load I have it on and can spin @ 60,000 rpm
I have a 20 amp 12v dc speed controller designed for motors but its not enough
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Old 27th January 2006, 11:18 AM   #6
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what are you using it for? for some reason I assumed you would be using it to control a DC turntable motor, which would need to run really slowly- a 10x2 wouldnt be my first coice for a turnatble motor!
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Old 27th January 2006, 11:41 AM   #7
Hayden is offline Hayden  Australia
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It's just one of my crazy inventions. Its a electric turbine
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