Abstract
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.
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