V_pwl
Piecewise linear voltage source
Description
Equations
Variables
Connections
Parameters
Modelica Standard Library
The V_pwl component models a current source defined by linear interpolation from a given table. The time points and voltage values are stored in a matrix table[i,j], where the first column contains the time points and the second column contains the voltage to be interpolated. The table interpolation has the following properties:
This model generates a voltage by linear interpolation in a given table. The time points and voltage values are stored in a matrix table[i,j], where the first column table[:,1] contains the time points and the second column contains the voltage to be interpolated. The table interpolation has the following properties:
The time points need to be monotonically increasing.
Discontinuities are allowed, by providing the same time point twice in the table.
Values outside of the table range, are computed by extrapolation through the last or first two points of the table.
If the table has only one row, no interpolation is performed and the voltage value is just returned independently of the actual time instant, i.e., this is a constant voltage source.
Via parameters startTime and offset the curve defined by the table can be shifted both in time and in the voltage.
The table is implemented in a numerically sound way by generating time events at interval boundaries. This generates continuously differentiable values for the integrator.
i=ip=−in
v=vp−vn=tab.y
Name
Units
Modelica ID
v
V
Voltage drop between the two pins vp−vn
i
A
Current flowing from pin p to pin n
p
Positive pin
n
Negative pin
Default
table
[0,0; 1,1; 2,4]
Table matrix (time = first column, voltage = second column)
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
See Also
Analog Components
Spice3 Overview
Spice3 Voltage Sources
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