Re: [CAD_CAM_EDM_DRO] Sizing Rectifiers

Yo Jack;

I've Never heard of a full wave _6_ diode bridge. I've seen plenty of 4 diode
bridges circuits, but never a 6. What do you do with the extras?

Bill

On Fri Nov 30 20:07:33 2001, jmw@..., <jmw@...> wrote:

>Sorry, this is a little off-topic--but the group has so much
>horsepower.
>
>Suppose one is making a power supply to deliver 250 amps at 30 volts
>DC 60% duty cycle from three phase 230 using 3 single phase matched
>transformers and a full wave bridge consisting of 6 diodes. The
>ultimate load is resistive (arc welding). What amperage rating should
>the diodes have? Even at full output each diode doesn't feel the
>entire current all the time--right?
>
>I have checked some authoritative sources, e.g. Motorola Rectifier
>Applications Handbook, but wasn't entirely sure of what I was reading.
>
>Maybe every shop electrician knows a rule of thumb that covers this
>situation?
>
>Thanks in advance.
>
>-Jack

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