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DRSSTC Tuning and Split Frequencies of Dual coupled system



Original poster: "Mccauley, Daniel H" <daniel.h.mccauley@xxxxxxxx>


Just a question regarding frequency splitting within a two coil coupled
system.

With two coupled coils, there is a frequency split which occurs that is
depending on the coupling factor.  The higher the coupling, the greater
the frequency split.  That we know.  Now, with DRSSTCs, it has been
stated that tuning the primary circuit to the lower frequency pole of
the frequency split is beneficial for DRSSTC systems.

The question is, and its not as easy or straightforward a question as it
sounds, is what exactly is occuring when you "tune" the primary to the
lower pole of the split frequency.  Firstly, as you decrease the natural
resonant frequency of the primary circuit, the lower pole frequency will
move as well, so you will never match the natural primary frequency with
the lower pole frequency.

Does tuning the primary circuit lower in frequency (closer to the lower
frequency pole) force the feedback to operate the DRSSTC at the lower
pole frequency?  To basically kind of fall in place?

What are your thoughts?

Dan