Click or drag to resize

Voltage

EMA3D allows setting voltage distributed across geometry as an excitation source.

The locations of the voltage sources are specified by identifying geometry or nodes where the source is to be applied, with additional data provided to specify the source characteristics.

Creating the Voltage Source

  1. Click Voltage Voltage Source Image 16 within the Excitation panel under the EMA3D tab in the Ribbon.

    voltage source 1

    Alternatively, right click Sources in the Simulation Tree and select Voltage Density Image 16 Voltage.

    voltage source 9

  2. Adjust the properties of the voltage source in the properties panel. The list of adjustable properties and their definitions are provided in the table at the end of this page.

    voltage source 2

  3. Click on the appropriate selection tool (i.e., line Select Line Image 16 ) in the top left of the model window to restrict the voltage source assignment definition.

  4. Click on the geometric entity to be excited. It will be highlighted. Note that the geometric entity used for the source should not have a material definition assigned to it.

    voltage source 4

  5. Click OK Check Image 16 to complete the voltage source setup.

  6. The excited geometry will be recolored red and black in the model window (users may need to click elsewhere in the model window to remove the highlighting). The positive end of the excited geometry will be indicated by a red dot with a + symbol and the negative end will be indicated by a black dot with a - symbol.

    voltage source 5

  7. The voltage source will be added to the Simulation Tree under the Sources node as Voltage Density Image 16 Voltage Source. The yellow warning label attached to it indicates that the source needs a signal attached to it.

    voltage source 6

  8. Instructions on adding signals can be found here. Once a signal is attached to the source, the yellow warning label will disappear.

    voltage source 7

  9. Selecting Voltage Density Image 16 Voltage Source in the Simulation Tree will highlight the source in the model window.

    voltage source 10

  10. To edit the voltage source at any time, right click Voltage Density Image 16 Voltage Source in the Simulation Tree.

    voltage source 8
Voltage Source Properties

Entry

Meaning

Name

The display name of the voltage source in the Simulation Tree

Reverse current direction

The voltage polarity is prescribed automatically depending on the direction in which the geometry was drawn. The voltage polarity for a line will be shown with red and black dots with +/- signs, respectively, near the source geometry after clicking the OK Check Image 16 button. To reverse the direction change False to True

EMA3D - © 2025 EMA, Inc. Unauthorized use, distribution, or duplication is prohibited.