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Re: DRSSTC Timing Chart

Original poster: "Gerald  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Terry,

The timing diagram is a great help for me. Maybe a couple of suggestions that might make the terminology a little bit more self describing. First, I'm presuming that during one BANG ON time, multiple RF cycles are occuring during ring up (analogous to the bang of a spark gap). If so, this might want to be stated somewhere in your theory of op :-))

T1: BANG ON time (ring up time - how many RF cycles do you allow for ring up??? is this programmatic or self controlling).

T2:  BANG OFF time  (ring down occurs during this time).

T3: Im thinking this could be called the BANG PERIOD (or BANG CYCLE) and would have clearer meaning.

T4: BURST ON time. I agree with your second diagram and maybe this should be interger number of T3's. Ringing is still going after the last BANG ON time and this time is still part of the BANG PERIOD definition. Consistant definitions have value to me.

T5:  BURST OFF time:

T6: Here I'm also thinking that BURST PERIOD (or BURST CYCLE) might be clearer. BURST OFF would of course be BURST PERIOD minus BURST ON (how ever you decide to define burst on).

Is the RF charging frequency (using your primary current feedback and corresponding to one H-bridge +-/-+ cycle) controlled by a SW loop or is it purely HW controlling this??? If SW, do you have a name for this cycle???

The one thing I find a little confusing is the definition of BPS. Your definition holds true during the BURST ON time but not if averaged over a second. I think of BPS as total bangs in one second and maybe I just need to get use to it in this context. Maybe the term peak BPS or BPS during burst would be appropriate.

One spectator's opinion.

Gerry R.



Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>

Hi All,

I made up this DRSSTC timing chart:

http://drsstc.com/~terrell/notes/DRSSTC-Timing-Chart.gif

I am running up to 5000 BPS now ;-)) Thus, all this timing stuff gets really important!!

It goes off Steve Ward's definitions but adds a bit more detail. Steve said it sounded good to him.

Bang Time becomes Total Bang Time and Burst Time becomes Total Burst Time. But that can be shortened to just the usual Bang Time and Burst Time in most cases. It helps to distinguish between Bang Time and Bang On Time when that level of detail is being discussed.

The Burst Off Time has me a little perplexed as to where it should begin and the Burst On Time should end? I think that should be moved to the right past the last Bang On Time with the added Bang OFF time too:

http://drsstc.com/~terrell/notes/DRSSTC-Timing-Chart-01.gif

That "looks" a bit odd, but is "technically" more correct for say programming purposes. It will really get strange when one plays with Bang On Time and Bang Off Time during Burst On Time* ;-)) I think you can modulate the coil that way for really strange effects ;-))

It is rather hard to abbreviate these things since they have the same beginning letters... Could do like BAonT and BUonT... Or maybe we could agree on T1, T2, T3... From the magic "chart"?? That is what I have started doing. Anyone who is "up there" enough to care about this stuff will get the Tx designations real fast... I think we are starting to run out of room for too many more abbreviations anyway.

Steve Ward said: 
I would prefer just using the Tx designations on the chart rather than
coming up with funny abbreviations and stuff.  Just need to include a
link to the holy chart in each email where this information is
discussed so that readers can follow along.



Cheers,

        Terry

*It will really get strange when one plays with T1 and T2 during T4. - Thus the advantage of using Tx abbreviations...