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Author Topic: Scope shots of clean kicks  (Read 31317 times)

bob.rennips

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Re: Scope shots of clean kicks
« Reply #60 on: July 05, 2007, 07:06:35 AM »
Quote from: eldarion on July 03, 2007, 10:35:30 PM
Well, I wrapped a coil around the outside of the TPU but wasn't able to couple much energy at all, regardless of frequency.

I am wondering if your original idea was correct; if I were to put some Schottkey diodes across the control coils in order to cause a magnetic spike on back-EMF that will couple into the next coil, etc.  The electric spike doesn't seem to do much good, at least as far as I can see.

More experiments to come...

Eldarion

Thanks for your feedback. I found diodes across a coil reduce the BEMF. I tried for while without any diodes - max BEMF but obviously max chance of burning things out! Try applying a DC current from a separate 12V battery to your output coil and scoping the output coil for anything unusual.

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bob.rennips

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Re: Scope shots of clean kicks
« Reply #61 on: July 09, 2007, 01:16:33 PM »
Refer to this circuit to see how to utilise BEMF as pulses into control coils.

http://www.overunity.com/index.php/topic,2697.0.html
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eldarion

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Re: Scope shots of clean kicks
« Reply #62 on: July 09, 2007, 06:54:13 PM »
Bob,

Thanks for the info; I will order some fast reverse recovery time diodes and try those on the TPU.

That would explain my burnt-up 1N4007s... ;D

Eldarion
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