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[DPRG] Capacitor calculation

Subject: [DPRG] Capacitor calculation
From: Mike McCarty jmccarty at ssd.usa.alcatel.com
Date: Thu Jul 26 13:03:46 CDT 2001

On Thu, 26 Jul 2001, R. Bickle wrote:

> Sir,
> 
> Sounds like you are driving the motor from a full-wave rectified supply.
> What you want to do here is decide how much ripple voltage you can tolerate
> at the output. Then you can calculate your capacitance by:
> 
> V(ripple) = I(load) / 2fC
> 
> so
> 
> C = I(load) / 2f * V(ripple)
> 
> A motor will not really care much about a clean supply though. To get low
> ripple at 10 amps, you are going to need a tremendous amount of capacitance.

... Or a regulated supply, or a capacitance multiplier.

But 10A is a *lot* of regulated current unless you use a switcher.


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