RE: Parallel resonant DRSSTC

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


Operation of a DRSSTC is somewhat different.
Remember, that most of the energy during a DRSSTC cycle comes from the
DC Bus capacitor, not the primary
tank capacitor.  So even in parallel resonant operation (and i haven't
looked into seeing if that would work
or not), you will still have the same peak currents in the switching
devices.  The primary tank circuit
is primarily to create a very low impedance as seen by the driver. (e.g.
at resonance approached zero impedance)

Dan



>Hi all,
>
>I was curious if anyone has ever tried designing a DRSSTC
>using a capacitor
>in parallel with the primary rather than in series with it. If
>something
>like that could work it would have a big advantage that the
>extreamly high
>primary current would be between the capacitor and primary,
>and there would
>be almost no current throgh the switching devices.
>
>Has anyone ever thought of something like this, or played with
>the idea
>with simulation software?
>
>What would be the disadvantage of something like that?
>
>Sue
>
>
>