Re: [CAD_CAM_EDM_DRO] Re: capacitor

Hi Les:
I'm truly amazed!!!
That calculation would have been neither quick nor rough for me!!! { :<)}
Cheers

Marcus

----- Original Message -----
From: "Les Watts" <leswatts@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 20, 2002 7:12 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re: capacitor


> I just do a quick rough calculation where the total energy of
> a regenerative brake at max velocity (1/2mv^2) plus
> the energy stored in the motor field (1/2Li^2) equals the additional
energy
> in the supply cap (1/2C(v+vr)^2 to find
> the voltage rise in that cap. I needed about 20,000 uf
> to keep the rise a few volts maximum without using a
> shunt regulator.
>
> Leslie Watts
> L M Watts Furniture
> Tiger, Georgia USA