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[DPRG] Re: Motor stuff
Subject: [DPRG] Re: Motor stuff
From: Subhobroto Sinha
subhobroto at gmail.com
Date: Sun Apr 1 21:12:39 CDT 2007
> The star topology is quite important when separating motor noise from
> logic. Also remember that separating them electrically isn't enough, as
> wires carrying noise and high current transients both capacitively couple
> and radiate them to anything nearby. You MUST keep the two systems
> physically separated as much as possible, especially where radio or low
> impedance sensors are involved.
Can you give me some ballpark figures for the L and C values ?
What kind of motors have you tested the star filter against ?
You are correct, the motor leads should be as small as possible with
standard 0.01uF ceramics in standard noise suppression configuration.
I am also interested in inputs from others regarding this.
> Shielding can help, but it's just as easy to make the noise problems worse
> if your shield acts as a passive re-radiator.
Perhaps shields would make the bot too expensive and heavy ?
Lightweight drilled shields are very expensive.
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