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Sample problems 

Nonlinear capacitor

This is an example of the nonlinear electrical simulation, performed with QuickField software.

Problem Type:

Axysimmetric problem of transient electric.

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) = 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).

Download simulation files:

Student's version	Professional version
telec1_stud.zip	telec1.zip