Analysis of Ultra-Thin and Flexible Current Transformer Based on JA Hysteresis Model

This paper describes the design, fabrication, and analysis of an ultra-thin and highly flexible current sensing transformer. The transformer windings are printed on flexible polyimide substrate layers with a magnetic foil sandwiched in between. The fabricated transformer can wrap around any electrical cable for current sensing purpose. The design of the transformer adopts a circuit model that includes the nonlinearity of the magnetic core based on the Jiles-Atherton hysteresis model, which is validated experimentally.