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Main >> Applications >> Sample problems

Welding transformer output power - QuickField simulation example

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

Engineering question

How to find welding transformer leakage flux and volt-ampere characteristic?

Engineering answer
Set up a plane-parallel QuickField AC Magnetics problem for a welding transformer and evaluate leakage flux and volt-ampere characteristic from computed field results.

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Typical applications
welding transformers, transformer leakage flux paths, nonlinear transformer cores

Welding transformer

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Simulation problem

Problem Type
Plane-parallel problem of AC magnetics.

Geometry
Welding transformer output power Calculate the loading characteristic of the welding transformer. Core Primary Secondary I+ I- C R

Given
C = 1 μF, R = 0..10 Ohm;
Primary voltage V = 220 V;
Frequency f = 60 Hz;
Primary number of turns = 1200;
Secondary number of turns = 220;

Task
Calculate the output U(I) chart of the welding transformer.

Solution
A series of problems with different R value were automatically generated and simulated using LabelMover parametric tool.

Results
Magnetic flux density distribution and the electric current for the R=0.1 Ohm.
Welding transformer output power

Output characteristic of the welding transformer:

Video

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