I've added a folder "Diode Commutation EMI" that explain the causes of diode commutation EMI and steps to mitigate it.
There are other solutions today, special diodes with controlled turn off characteristics exist,?
There are soft turn off diodes, and, oddly enough, fast recovery diodes. I suspect there are others but those are the only two I have any experience with.
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The "MicroSemi 302 Rectifier Reverse Switching Performance EMI" is extremely detailed. I wish I'd had this paper in 1974.
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