REDUCTION OF INRUSH CURRENT HN SINGLE-PEUSE TRANSFORMER USNG VIRTUAL AJR GAP TECHNIQUE

In this paper the authors present a technique based on the use of a virtual air gap in which equivalent thickness varies as a function of controllable parameters adapted to the configuration of the magnetic circuit and the associated control system. The principle is presented using a magnetic circuit similar to the transformer one. Among the numerous applications, this technique can be applied to reduce inrush current in single-phase transformers.