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Forums
4hv.org :: Forums :: Tesla Coils
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DRSSTC Tank Circuit Current

Move Thread LAN_403
Steve Conner
Wed Feb 10 2010, 05:31PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
The formula I recommend is Irms = 0.5*Ipk*sqrt(Ton*bps)

It's only a rough estimate.
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GeordieBoy
Thu Feb 11 2010, 11:37AM
GeordieBoy Registered Member #1232 Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
I agree with Steve. That formula linked to earlier is wrong. There should definitely be a 0.5 scaling factor in there because the RF current is sinusoidal, and it has an approximately sinusoidal envelope superimposed on it too. So the two RMS conversion factors of 0.707 multiplied together give you 0.5

The sqrt(Ton / Period) or sqrt(Ton * bps) takes care of the fact that the current waveform is gated squarely on and off for a particular duty ratio.

-Richie,
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UbuntuNinja
Thu Feb 11 2010, 07:23PM
UbuntuNinja Registered Member #2677 Joined: Mon Feb 08 2010, 03:06AM
Location: Palo Alto, California, USA
Posts: 64
Does anyone know if I made a mistake in the ScanTesla input.txt file i attached in my previous post? When I run ScanTesla, the output.txt file says that none of the models were tested. If someone could check out the input.txt file and either tell me what i did wrong (if that is indeed the problem) or correct it yourself i could just run a model in ScanTesla. btw thanks to all who have replied to my question so far.
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UbuntuNinja
Sun Feb 21 2010, 05:08AM
UbuntuNinja Registered Member #2677 Joined: Mon Feb 08 2010, 03:06AM
Location: Palo Alto, California, USA
Posts: 64
I got the ScanTesla file to work so I got my question figured out. Thanks to all who contributed information.
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