CURRENT MEASUREMENT UNCERTAINTY - AN OBSTACLE IN THE CHARACTERIZATIONOF POWER ELECTRONIC COMPONENTS

The aim of this paper is to clarify the need for the most accurate cur rent measurement applied to the characterization of the power electron ic components. The focus is on the behaviour of the normally used high quality high bandwidth current transformers and other sensors to a fa st varying high di/dt test current furnished by a new developed test c urrent generator. In this paper after explaining the new strategy of t he test generator, different current transformers are tested and chara cterized and a detailed comparative experimental study is carried out using a non-inductive shunt as the reference. Finally some general rem arks and the necessary precautions and different measurement problems are listed and discussed.