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Main > Application > Sample problems

TECircuit2: Pulse transformer

This is an example of the pulse transformer simulation, performed with QuickField software.

Problem Type:

Plane problem of transient magnetics.

Geometry:

model of the pulse transformer

pulse transformer equivalent electric scheme

Given:

Magnetic permeability of the steel core μ = 500;
Conductivity of the steel core g = 0 S/m (steel core is laminated);
Magnetic permeability of the windings μ = 1;
Conductivity of the windings (copper) g = 56,000,000 S/m;
Number of turns of the primary winding w1 = 20;
Number of turns of the secondary winding w2 = 40;
Number of turns of the third winding w3 = 20;
Pulse voltage U1 = 0.5 V;
Impulse time t = 0.1 s.

Problem:

Square voltage impulse applied to the pulse transformer. Calculate the currents in the secondary winding.

Solution:

Due to model symmetry we leave the upper half of the transformer only. Therefore we should reduce the circuit elements' values by two.

Results:

pulse transformer currents

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