Optimized filter inductors for a 1MW windmill demonstrator with an objective to reduced converter size

In this paper, thermally optimized filter inductors are presented for a 1 MW windmill demonstrator. It is shown how simulation based on finite element method (FEM) can be used to predict the L(I) inductance curve, the core losses and the hot-spot temperature as well. Extensive measurements are conducted to verify all simulated data. To draw a conclusion, inductors based on different core materials are compared against each other.