Nonlinear capacitor consist of metal plates isolated by nonlinear dielectric.
An axisymmetric problem of Transient electric field.
Relative permittivity dielectric - nonlinear.
Voltage U0 = 0.. 240 V.
Calculate C(U) curve.
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.
Measured u(t) and q(t).
Calculated nonlinear capacitor characteristics C(U), q(U).
See the Telec1.pbm problem in the Examples folder.