Author Topic: Capacitor Values To Reduce Electrical Noise?  (Read 4351 times)

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Offline SylvestreTopic starter

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Capacitor Values To Reduce Electrical Noise?
« on: October 11, 2011, 06:27:18 PM »
Hey guys,

I have two motors that require 18 amps.  I am using a Sabertooth 2x25 motor driver to control these motors and have a 24 volt 55 AH.  Can I just use three 0.1 uF to reduce the noise?  If not, what should I use?  I am using these motors  http://www.monsterscooterparts.com/24v-350w-motor-11-tooth-25-chain-my1016.html
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Offline newInRobotics

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Re: Capacitor Values To Reduce Electrical Noise?
« Reply #1 on: October 12, 2011, 03:19:00 AM »
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Offline SylvestreTopic starter

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Re: Capacitor Values To Reduce Electrical Noise?
« Reply #2 on: October 12, 2011, 12:26:46 PM »
I have looked at this and it didn't really give me what I was looking for.  Can I use 0.1 uF capacitors or will I need capacitors of higher value?
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Offline newInRobotics

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Re: Capacitor Values To Reduce Electrical Noise?
« Reply #3 on: October 12, 2011, 01:34:18 PM »
By the way, isn't Sabertooth 2x25 a regenerative driver? If so, it already has two large caps to absorb spikes and compensate voltage drops. You can also add 100nF cap between motor terminals to fully filter out high frequency noise. Also, as suggested by Soeren in the before mentioned post, motor housing should be grounded by low impedance path and both terminal connected to it via 100nF cap.
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"Computer games don't affect kids; I mean if Pac-Man affected us as kids, we'd all be running around in darkened rooms, munching magic pills and listening to repetitive electronic music." - Kristian W

Offline SylvestreTopic starter

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Re: Capacitor Values To Reduce Electrical Noise?
« Reply #4 on: October 12, 2011, 04:30:52 PM »
Ok thank you.  Yeah I thought this was protected by the Sabertooth.  I just wanted to make sure.  Thanks for your help!  :)
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