Determining the Parameters of a Resistance Spot Welding Transformer Using Differential Evolution

This paper deals with determining the parameters of a resistance spot welding (RSW) transformer dynamic model. To obtain an efficient, accurate, and reliable dynamic model of an electromagnetic device, accurate determination of its model´s parameters is crucial. In regard to an RSW transformer, determining of the dynamic model´s parameters presents a big challenge. This paper presents a new methodology for determining such parameters, which can be used where other methods are not applicable or they give inaccurate results. It is based on a stochastic optimization algorithm called differential evolution (DE). Using the presented dynamic model of the device, the parameters of the model are determined by DE in such a way that the deviation between the measured and the calculated values is minimal.