Nonlinear capacitor
This is an example of the nonlinear electrical simulation, performed with QuickField software.
Problem Type:
Axysimmetrical transient nonlinear electric problem.
Geometry:
 
Nonlinear capacitor consist of 14 metal plates isolated by nonlinear dielectric material.
Given:
Relative permittivity of dielectric material - nonlinear.
Voltage U0 = 0.. 240 V.
Problem:
Calculate C(U) curve.
Solution:
To calculate C(U) curve we should make a set of experiments: change the voltage and measure the charge q. The capacitance is C = q / u.
To automate the task lets apply the time-dependent voltage u(t) = Umax*t, where t - is time. Thus we replace the series of problems with one time-dependent problem. After the problem is solved QuickField can calculate q(t) automatically.
Results:
Measured u(t)and q(t).
Calculated nonlinear capacitor characteristics C(u), q(u).
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