Hi, everyone. Dr. Meeker write: You have to multiply the conductivity of the bulk coil material by the fill factory and enter that value as the conductivity for a wound region. Well. With FEMM i have calculated a sample coil with 5 turns "coil5t.femm",fill factory=0.83 The coil material has a conductivity=46.73 MS/m. If i multiply the conductivity by SQRT(fill factory),(and not only by fill factory) and i enter the conductivity =46.73*SQRT(0.83)=42.57MS/m ,the results are: Total current = 13052.1 - j 74325.1 Amps (AMPLITUDE) Voltage Drop = 71.0381 + j 0.107124 Volts Flux Linkage = 0.0385309 - j 0.219415 Webers Flux/Current = 2.95209e-006 - j 1.05879e-022 Henries Voltage/Current = 0.000161422 + j 0.000927428 Ohms Real Power = 459616 Watts Reactive Power = 2.64066e+006 VAr Apparent Power = 2.68036e+006 VA Real Power = 459616 Watts =459.616 kW Reactive Power = 2.64066e+006 VAr=2640.66 kVar Apparent Power = 2.68036e+006 VA the same results as with an another femm-program: Voltage=50.0 + j0.0 Volts as INPUT Coil material has a conductivity=46.73 MS/m as INPUT The results are: Total current =929.2 -j 5255.8 Amps(efectiv)= 13052.1 - j 74325.1 Amps (AMPLITUDE) Voltage/Current = 1.621E-04 + j 9.229E-04 Ohms Real Power =461.5 kW Reactive Power =2627.8 kVar The real power 459kW (61.5kW), the reactive power 2640.66 kVar(2627.8kVar) and the Voltage/Current are practically the same! It is that "conductivity by SQRT(fill factory" OK or an error from me? Thanks Santiago Salamanca
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coil5t.fem
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