Simulation of electric and magnetic fields using FEMM - FH Aachen ...
Simulation of electric and magnetic fields using FEMM - FH Aachen ...
Simulation of electric and magnetic fields using FEMM - FH Aachen ...
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1.1.4 Add materials to the model<br />
Set up the information <strong>of</strong> material (schicht1, schicht2, inner, air) <strong>and</strong> conductor (layer1,<br />
layer2, gnd), <strong>using</strong> the functions under menu “Properties”.<br />
Figure 1-5 Properties menu<br />
The voltage on each layer must be calculated first.<br />
Table 1-2 Formula<br />
Cylinder- capacitor<br />
Figure 1-6Cylinder capacitor 3<br />
Equation 1<br />
→C‟1/C‟2=3/2<br />
→U1/U2=C‟2/C‟1=2/3<br />
Uges=U1+U2=130kV<br />
→U1=52kV U2=78kV<br />
If we want to define the voltages, click on “Conductors” <strong>and</strong> then fill in the names <strong>and</strong> values.<br />
Here we have the values <strong>of</strong> voltage, so we fill the blank under “Prescribed Voltage”.<br />
Otherwise we can fill the “Total Charge, C” if we have the value in unit Column.<br />
Voltage on Layer 1 is the total voltage (130kV) from center <strong>of</strong> cable to the ground.<br />
3 http://upload.wikimedia.org/wikipedia/commons/b/b8/Cylindrical_CapacitorII.svg