Solid States Devices > TPU builders
Deciphering the TPU in 2008
eldarion:
--- Quote from: BEP on May 15, 2008, 03:53:01 AM ---@Eldarion,
Even then, from what I've read so far, the operating frequencies won't allow a profound result but it should be better and hopefully stable.
--- End quote ---
Hi BEP,
I will try what you suggested and report back. I am curious, with your comment above, what frequency range would you suggest? My controller will go from DC to 20MHz repetition rate...I chose 100KHz for no reason really. :D
So the controller is actually interfering with the coil as well? That's interesting.
By the way, I can't fit any part of my controller in the center of the coil. ;)
Thanks!
Eldarion
BEP:
Hmm...
I couldn't even guess what frequency would be best for your coil - I'll have to read more before I will have a chance at a clue. I do know with the single wind controls your inductance is high in all the coils. This means the velocity factor is also low for the collectors...not a good thing.
Most will think low VF means lower resonance point.... yes and no. Lower resonance (conventional resonance) but not as low as it can be and worse yet... lower energy from the collector.
I'll show no more disrespect (you showed me yours and I haven't shown you mine).
Try the earlier suggestion only first. If it is what I think it is I'll show you mine and have another suggestion.
Just sit the part of the controller that has the highest energy level on top of the coil - insulated.
eldarion:
--- Quote from: BEP on May 15, 2008, 05:15:03 AM ---Hmm...
I couldn't even guess what frequency would be best for your coil - I'll have to read more before I will have a chance at a clue. I do know with the single wind controls your inductance is high in all the coils. This means the velocity factor is also low for the collectors...not a good thing.
Most will think low VF means lower resonance point.... yes and no. Lower resonance (conventional resonance) but not as low as it can be and worse yet... lower energy from the collector.
I'll show no more disrespect (you showed me yours and I haven't shown you mine).
Try the earlier suggestion only first. If it is what I think it is I'll show you mine and have another suggestion.
Just sit the part of the controller that has the highest energy level on top of the coil - insulated.
--- End quote ---
OK, will do! :)
I don't remember any disrespect...
Eldarion
BEP:
One last thought before I rest these bones :)
Go ahead and look at your switch pulse in relationship to the catalyst. You may find the catalyst is only there when the switch is on or off.
Going by your scope shots the natural ringing says the sequence around the toroid would be better around 250kHz.
EMdevices:
nice work eldarion. That's certainly the type of thing we are looking for, some DC offset with an AC ripple on top.
Can you post a diagram of how the coils are oriented in your TPU? It's been a while and I don't remember if this is the old Bob Boyce diagram with the 3 sector coils or not, and where the secondary is placed.
EM
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