CM300DY-24H Frequency Limit

slash128v6, Mon May 22 2017, 10:45PM

Hi all,

I mistakenly picked up a set of CM300DY-24H modules when I was actually looking for CM300DU-24NFH. Anyway, now that I have them I am wondering if they would be ok for 72KHz soft switching. I am struggling with the data sheet, which says 20KHz-25KHz, but I believe that is for hard switching. I have been searching and came across another thread on this forum that seemed to suggest they would likely work up to 100KHz with sub-70KHz being preferable:

http://4hv.org/e107_plugins/forum/forum_viewtopic.php?165662

Aside from this post I am struggling to find other examples of success stories > 70KHz with these IGBTs.

Thoughts?

Thanks!

Jason
Re: CM300DY-24H Frequency Limit
Hydron, Tue May 23 2017, 07:21AM

I (and others) have used CM300DY-24H at similar frequencies without trouble (my coil runs them up to about 80kHz at upper pole tuning).
I had some questions here about spikes when switching, but the consensus was that it was completely fine, and I haven't had any failures:
Link2
Re: CM300DY-24H Frequency Limit
slash128v6, Tue May 23 2017, 06:34PM

Awesome, thank you!
Re: CM300DY-24H Frequency Limit
Mads Barnkob, Wed May 24 2017, 07:49AM

You can calculate the maximum possible switching frequency from the parameters your run your coil at vs. the datasheet data: Link2
Re: CM300DY-24H Frequency Limit
slash128v6, Wed Jun 14 2017, 10:40PM

Thank you Mads! I've been referencing your site quite a bit!