Re: capacitor

Jon,

Good points except for the cap size which is a bit of an over-kill. I
suggest using the following for sizing caps:

For 60Hz, C = (80,000 times I) / V
For 50Hz, C = (100,000 times I) / V

Where V is the power supply voltage, I is the maximum power supply
current and the answer, C, is in microfarads.

This scales the ripple voltage to about 10% of the output voltage and
keeps the power factor reasonable.

For 10A @ 80VDC, this yeilds 10,000 uF at 60Hz.

Mariss

--- In CAD_CAM_EDM_DRO@y..., Jon Elson <elson@p...>

You need to double the value of each

> cap when in series, so to get 100,000 uF at 80 V, use 2 200,000 uF
> 40 V caps. Since the voltage balance is not perfect, stay down at
> 70 V or find 50 V caps.
>
> Jon