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I am attempting to build a QCW type Tesla Coil for a project at my university. I am now working the design of the primary capacitor which needs to be approximately 0.01uF.
I am looking at using these capacitors as we have a supply of them in our lab.
Vishay MMKP 383 Series
Does anyone have an idea of what an RMS current rating would be on these particular types of capacitors?
I have reviewed the document, but could not find information on Page 6. Did you link the correct document? Page 6 lists only test information, mostly mechanical, about the capacitor.
There is some power information on Page 5, but that only shows how to determine the actual dissipation of the capacitor in operation.
Is there something i am missing on how to calculate the max. theoretical RMS current of a capacitor using this information?
Registered Member #1403
Joined: Tue Mar 18 2008, 06:05PM
Location: Denmark, Odense C
Posts: 1968
Its on the document page 6, which is the pdf page 5. But I am sorry, I missed that the current formula there was a part of power dissipation calculation and not a RMS calculation in itself.
I do however still think you need to look at their general documention to find the answer, this is the case with WIMA capacitors.
Registered Member #33
Joined: Sat Feb 04 2006, 01:31PM
Location: Norway
Posts: 971
The RMS current rating is hidden within the RMS voltage vs. frequency graphs. Pick any point on the diagonal line for the given capacitor, and find the corresponding frequency and voltage for this point. Calculate the impedance of the capacitor at this frequency (Z = 1/(2*pi*F*C)). Divide the voltage at the point you selected by this impedance to get the RMS current rating of the caps.
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RMS Current Rating for MMKP capacitors for QCW?
