In a static (DC) electric circuit analysis, you determine the voltage and current distribution in an electric circuit that is subjected to applied DC source voltages or currents. Static circuit analyses allow all circuit components.
In a static analysis, the program treats capacitors as open circuits and inductors as short circuits. To represent a short circuit condition, couple the two nodes of the inductor in the VOLT degree of freedom, using one of the following:
Once you have built the circuit, you apply loads and obtain the solution, then view the results.
You need to define the analysis type and options, apply loads, and initiate the finite element solution. To accomplish these tasks, follow the steps listed below.
To enter the SOLUTION processor, use either of the following:
To specify the analysis type, do either of the following:
In the GUI, choose menu path and choose a Static analysis.
If this is a new analysis, issue the command ANTYPE,STATIC,NEW.
Restarting an analysis usually is required only for continuing a transient circuit analysis.
Normally, you specify source loads for circuits in the Circuit Builder, as element real constants. Besides the source loads, the only other "load" is a VOLT = 0 specification at the ground nodes. To specify VOLT = 0, use either of the following:
Should you need to modify the source loads, use one of the following:
Use either the SAVE command or the SAVE_DB button on the Toolbar to save a backup copy of the database.
To start calculating the solution, use one of the following:
To leave the SOLUTION processor, use one of the following:
The program writes results from a static (DC) circuit analysis to the results file, Jobname.rth. The results are two types of primary data: nodal voltages (VOLT) and nodal currents (CURR). The following derived data calculated for each element also are available:
Element voltage drop (VOLTAGE)
Element current (CURRENT)
Element control voltage (CONTROL VOLT)
Element control current (CONTROL CURR)
Element power (POWER)
Element applied load (SOURCE)
For more information about the derived results, see the Element Reference.
You can review analysis results in POST1, the general postprocessor, by choosing either of the following:
To review results in POST1, the database must contain the same model for which the solution was calculated. Also, the results file (Jobname.rth) must be available.
To read the data from the results file into the database, use either of the following:
Once the database contains the desired set of results, use one of the following to list the primary nodal data (voltages and currents):
To list the derived element results, use one of the following: