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Author Topic: Thane bi-toroid measurements (Info)  (Read 5970 times)

Offline void109

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Thane bi-toroid measurements (Info)
« on: June 08, 2010, 08:34:24 PM »
I put together a small setup to test the principle using a metglas secondary toroid and a generic ferrite toroid for the primary.  Here's a picture of the setup and the inductance results:
 Edit: Modified picture to add arrows... :)

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Offline gyulasun

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Re: Thane bi-toroid measurements (Info)
« Reply #1 on: June 08, 2010, 11:38:41 PM »

Thanks for this interesting info. Unfortunately "the loading back" to the source effect is rather high when both secondaries are shorted. Could you test with not a dead short but with a 2-4 Ohm resistor at hand which may sound more practical?

 Would you check also when you short the 1st secondary, then how the 2nd secondary changes? (perhaps in this latter test leave the primary coil open, then also short it too).  This way your great contribution would be even more useful.  Do you know any permeability data on the ferrite toroid? If no, no problem then just measure OD, ID and its height.

Thanks,  Gyula

Offline Sprocket

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Re: Thane bi-toroid measurements (Info)
« Reply #2 on: June 09, 2010, 12:11:57 AM »
Is there a real purpose with the 2'nd secondary?  I know Thane uses it in the patent to collect all possible power from the redirected BEMF for the final total, but even there, it's minuscule compared to the output from the 1'st secondary!  Wouldn't is be just as well to double the secondary core size and be done with it?

I also don't understand how the wire inductance relates to magnetic reluctance - isn't the core-reluctance just dependent on its own properties, size and possibly the AC frequency?  Lots I don't understand... :)

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Re: Thane bi-toroid measurements (Info)
« Reply #2 on: June 09, 2010, 12:11:57 AM »
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Offline Bruce_TPU

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Re: Thane bi-toroid measurements (Info)
« Reply #3 on: June 09, 2010, 12:26:09 AM »
Hi Void,

Good job on the build, the only thing I would suggest changing, is the following, as I have drawn it below, to fit better the understanding of the patent.  Also, Gyula's idea of using a resistor (or load as a small bulb, etc) on each of the two secondary coils it also consistant with the patent and a great idea.

Great job building something!!  That is what this forum needs much more of... IMHO.