>
>Like Larry, I've seen equalising resistors used and not used. If the diode
>is a controlled avalanche device, then sure you don't need them. If you
>don't have a controlled avalanche device and reasonable match on leakage and
>PIV and junction capacity, then I believe you do. Now if all the diodes are
>the same date code from the same manufacturer, they should be a reasonable
>match in capacity and PIV and leakage. (Leakage and PIV are not necessarily
>the same thing). Note that if you put two capacitors in series with DC
>across them, the voltage divides inversely proportional to the capacity, so
>a big imbalance in the junction capacity could lead to one diode getting
>more volts.
>
>Larry, have you done the sums on the peak current? Since you're using
>capacity input, the peak current will be determined by load and the various
>series resistances (and leakage inductance). It's possible that the peak
>current was being exceeded - I don't know the repetitive peak current rating
>of those diodes
>
200 amperes
cheers, Peter
- Rich..., 805.386.3734, www.vcnet.com/measures.
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