SIMPLORER User Manual V6.0 - FER-a

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90 Modeling with Circuit Components
� � «Use pin»
If the box is checked, the Source current is defined by the quantity connected to the pin, otherwise
the value in the text box is used.
� � «Partial Derivation»
If the box is checked, the improved partial derivation algorithm is effective. In few cases,
when the source value is defined with a equation, instabilities are possible. Clear the box to
avoid the problem.
� «Time Controlled»
The predefined time-controlled current source is selected. In the list, select a time function
and define the corresponding parameters. See also “Using Time Functions” on page 275.
� In the list, select the sine, pulse, triangular, trapezoidal, saw-tooth rising, or saw-tooth falling
time function.
AC Parameters
� «Phase & Magnitude»
The Phase/Magnitude representation is selected. Common parameter types. Enter a numerical
value, a variable, or an expression in the text box. See also “AC Simulation Models” on
page 401.
� «Angular Dimension»
In the list, select radians or degrees for the angular dimension of the phase.
� «Real & Imaginary»
The Real/Imaginary representation is selected. Common parameter type. Enter a numerical
value, a variable, or an expression in the text box.
Linear Current Source
it () =
I
The value of the source current is equivalent to the present value of the quantity specified in
the text box. Usually a constant value, a time function, or a variable are chosen, or the value
is determined in a state graph. All system quantities and variables can be combined with
mathematical and logical operators and constants.
However, the expression must be technically meaningful. If it is not, numerical instability or
completely wrong results are possible.In particular, sudden changes in the first derivation of
the control quantity should be avoided.
The voltage of an ideal current source is arbitrary. Real current sources have always an internal
resistance. If the internal resistance is essential for the simulation target, a corresponding
resistance must be connected in parallel.
Component Parameters
Description [Unit] Parameter Name Data Type
Source Current [A] IS real
Partial Derivation Flag (1: On; 0: Off) PARTDERIV real
EMF Magnitude [A] AC_MAG real
EMF Phase Shift [deg] AC_PHASE real