SIMPLORER User Manual V6.0 - FER-a

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78 Modeling with Circuit Components
Nonlinear Capacitor
it ()
To describe the nonlinear relation, you must specify a name of an appropriate XY nonlinear
characteristic function. See also “Separate Component Characteristic” on page 297.
X-value: charge q (independent quantity)
Y-value: voltage v (dependent quantity)
To define characteristic data you can do one of the following:
• «Use Pin»; the XY component, connected to the pin, provides the characteristic.
Within the Characteristic dialog:
• «Reference»; the name in the text box specifies an XY element placed on the sheet.
• «Lookup Table»
a. «File Reference»; the name in the text box specifies a variable which refers to a subsheet
port specifying a characteristic file.
b. «Lookup Table»; data pairs, defined in the table, are used for characteristic.
• � «File Name»; if you use an file, data pairs are displayed in the lookup table and used
for characteristic. You can modify the data when necessary.
Component Parameters
Description [Unit] Parameter Name Data Type
Initial Voltage [V] V0 real
Characteristic CH real
Component Outputs
Description [Unit] Parameter Name Data Type
Voltage [V] V real
Current [A] I real
Charge [C] Q real
Derivative of Voltage [V/s] dV real
Derivative of Current [A/s] dI real
Derivative of Charge [C/s] dQ real
Component Nodes
Description Node Name Nature
Pin 1 (with red point) N1 electrical
Pin 2 N2 electrical
Nonlinear dual Capacitor
=
dq
------------
() t
with q() t = fvt ( () )
dt
dv t
it () Cvt ( () ) ()
=
⋅ -----------dt