Differences

This shows you the differences between two versions of the page.

--- simple_electrostatic_simulation_in_femm_-_step-by-step_tutorial [2021/05/11 21:31]
stanzurek [Step 14 - results]
+++ simple_electrostatic_simulation_in_femm_-_step-by-step_tutorial [2021/05/11 22:08] (current)
stanzurek [Step 19 - that's it!]
@@ Line 42: / Line 42: @@
 {{enter_point.png}} Fig. 3-2. Entering point with coordinates (0,0)
-Click on the ''Zoom extents'' button (Fig. 3-3), which is the third one (white rectangle with a magnifying glass). (//If not sure - hover a mouse over the buttons and see their description in the botoom left of the FEMM window.//)
+Click on the ''Zoom extents'' button (Fig. 3-3), which is the third one (white rectangle with a magnifying glass). (//If not sure - hover a mouse over the buttons and see their description in the bottom left of the FEMM window.//)
 Then click on the ''Zoom out'' button once (magnifying glass with a minus).
@@ Line 210: / Line 210: @@
 ==== Step 15 - plot data along line ====
-In the solution window, use the "red line" icon (Fig. 15-1) to draw a path of lines or arcs, between any two existing points (left-click of mouse) or between any arbitrary points (righ-click of mouse). Once the path is created, various values can be plotter along that line, from the beginning to its end, in the same order as it was drawn.
+In the solution window, use the "red line" icon (Fig. 15-1) to draw a path of lines or arcs, between any two existing points (left-click of mouse) or between any arbitrary points (right-click of mouse). Once the path is created, various values can be plotter along that line, from the beginning to its end, in the same order as it was drawn.
+Use "line" icon (red arrow), draw the line between the points of interest, then click on the "graph" icon (black arrow), and select the type of plot in the pop up window.
 The path can end at the same point it started.
-To plot, press the "graph" icon (Fig. 15-1). A pop-up window will open and the variable to be plotted can be selected, Fig. 15-2. N
+To plot, press the "graph" icon (Fig. 15-1). A pop-up window will open and the variable to be plotted can be selected. The graph will be plotted in a new window.
 Note that there is an option to export/write the data to a file, which can be then used with any spreadsheet software.
-{{graph_of_line.png?500}} Fig. 15-1. Draw path to plot data
+{{el/line_el.png?500}} Fig. 15-1. Draw path to plot data
-{{graph_js_plus_je.png}} Fig. 15-2. Select data to plot or export to file
+{{el/line_el2.png?500}} Fig. 15-2. Plotted graph
-The graph will be opened in a new window. For AC simulations, black curve means the absolute value (total amplitude), blue is the "real" component (0 deg), and green is the "imaginary" component (90 deg).
-{{eddy_current_graph.png?500}} Fig. 15-3. New window with plotted data
 ----
-==== Step 16 - block integral ====
+==== Step 16 - line integral ====
-Some values can be integrated over the whole blocks. To select a block use the "green square" button, and then click anywhere within a block of interest, Fig. 16-1.
+Some values can be integrated over lines or blocks. Draw a line, and then chose the integral icon, Fig. 16-1.
-Then click on the "integral" icon.
+The calculated voltage is exactly -1 V, as defined in the conductors. Because the line was drawn from left to right, from "zero" to "positive", so the integral is evaluated correctly.
+{{el/line_integral_el.png?500}} Fig. 16-1. Select block
-{{block_integral1.png?500}} Fig. 16-1. Select block
-A pop-up window will appear (Fig. 16-2), and the drop-down list can be used to select the value of interest. After accepting, the value will be evaluated and shown in another pop-up window, Fig. 16-3.
-{{block_integral2.png}} Fig. 16-2. Select type of integral
-{{block_integral3.png}} Fig. 16-3. Calculated value of integral
 ----
 ==== Step 17 - conductor info ====
-The losses in the ciruict (energised coil) can be integrated with the block method described above, but much reacher information is provided with the "Circuit properties" icon, Fig. 17-1.
+Info about the given conductor with the "Conductor properties" icon, Fig. 17-1.
+If there is more than one conductor defined then it can be selected from the drop-down list.
-If there is more than one current/circuit defined then it can be selected from the drop-down list.
+Capacitance is charge over voltage, C = q/V, and because the voltage was set to 1 V, the capacitance of this capacitor is 3.6e-13 F, or 0.36 pF.
-{{conductor_info.png?600}} Fig. 17-1. Circuit properties
+{{el/conductor_properties_el.png?600}} Fig. 17-1. Conductor properties
 ----
@@ Line 259: / Line 257: @@
 If snap-to-grid is enabled then only the grid positions will be available.
-{{data_at_any_point.png}} Fig. 18-1. Click anywhere to get values
+{{el/point_props_el.png}} Fig. 18-1. Click anywhere to get values
 ----
@@ Line 265: / Line 263: @@
 ==== Step 19 - that's it! ====
-And that's all - now you can run a simple FEMM magnetics simulation!
+And that's all - now you can run a simple FEMM electrostatic simulation!
 {{page>insert/paypal}}

Unofficial FEMM documentation by Dr Stan Zurek

User Tools

Site Tools

Differences

Page Tools

Unofficial
FEMM
documentation
by Dr Stan Zurek