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From: John Popelish
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X-Mailer: Mozilla 4.7 [en] (Win98; U)
Subject: Re: Flyback ringing examined further
Date: Sat, 19 Oct 2002 15:23:16 GMT
NNTP-Posting-Date: Sat, 19 Oct 2002 11:23:16 EDT
Chris Carlen wrote:
> here is the link again to the page about the flyback. Scroll down to
> the end, to the section:
> "Experiment to determine the nature of the ring-down"
> There I have two more scope photos that should confirm the conclusions
> that were basically drawn about the "My flyback experiment is on the
> web" thread.
Thanks. This makes it clear that I was wrong about the gate voltage
being involved in the waveform. The nonlinear capacitance of the body
diode is certainly distorting the apparent center of the ring
oscillation until the amplitude gets small. Thanks for posting this.
I learned something.
Next question that comes to my mind would be how to design a snubber
to transfer the ring energy to somewhere else than the body diode
without much increasing the overall losses (or even reducing them).
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