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740:"serial resistances and ionic losses"?? ... Did you mean series resistance and dielectric losses? "Can be expressed" does not mean "is accurately expressed" when there are high conduction losses. Lots of people on this article are confused. This article should be relegated to incoherent starter status.
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The Series resistor has not to do with DF. In a real cap ESR exist but even an parallel resistance and DF is a measure of power in that resistance and not in ESR. ESR doesn't make any power loss in term of DF due to DFs definition. Def from Coombs ed.6th p.8.13 "The ratio of the total power loss in
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D.F is not constant over temperature, especially ceramic capacitors can have huge variation. So, if Q of an RLC circuit is determined by the loss-making R in the capacitor, the Q of the RLC will be changing with the changing losses in the dielectric. In supply filtering of high power logic chips,
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Which means that you are confused. All the serial resistances and ionic losses in a capacitor can be expressed as a single parameter of ESR or a series resistance. The rule of model equivalence is still valid, no matter how complicated the inner workings are.
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Isn't it correct to say that the DF is the ratio of energy dissipated to energy retained per cycle of an oscillation? The lede currently has "a measure of loss-rate of power" which is more vague (and therefore less useful but more likely to be
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Loss tangent is defined as the ratio of the imaginary to the real part of the dielectric constant(or permittivity). Traditionally, it is a tensor where the diagonal components are the ratio of the imaginary part to the real part.
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This page needs massive editing. The definition on the front page is clearly no general. For interdigitated capacitors, coplanar waveguides, and microstrips this is just wrong. Loss tangent in these cases is G/wC.
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https://web.archive.org/web/20090822191220/http://www.cartage.org.lb:80/en/themes/sciences/physics/electromagnetism/electrostatics/Capacitors/Applications/BasicConsiderations/BasicConsiderations.htm
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This description is too specific. It should be rewritten to also apply to core loss in cores of inductors, or other dissipative impedances.
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There is something wrong with this. According to other litterature I have studied the DF is R/X and not X/R
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If you have discovered URLs which were erroneously considered dead by the bot, you can report them with
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this is used as a vital anti-resonance feature. "completely unrelated", my donkey.
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A mechanical example could also be placed here using a spring, mass, and damper.
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the material to the product of the voltage and current in a capacitor
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But KEMET (capacitor manufacturer) says specifically that DF=ESR/Xc
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is the insulation resistance, which might be as large as 10,000
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When you have finished reviewing my changes, please set the
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How does it apply to core loss in coils and ferrite beads?
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for additional information. I made the following changes:
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loss tangent in the case of capacitors can be modeled as
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How is the dissipation factor related to the Q factor?
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