Nonlinear capacitor consist of metal plates isolated by nonlinear dielectric.

**Analysis Type:**

An axisymmetric problem of Transient electric field.

**Geometry:**

**Given:**

Relative permittivity dielectric - *nonlinear*.

Voltage *U _{0}* = 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) = *U*_{max}**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*).

See the *Telec1.pbm* problem in the Examples folder.