Simple skin effect compensation in cylindrical shunts

This paper proposes a new design solution for high-current shunt resistors aiming at optimizing the frequency response in a specified frequency range. It is based on a solid cylindrical shunt, whose sensing circuit runs through a straight hole drilled in the shunt itself. Compared to other solutions proposed in the literature, typically based on coaxial or cage configurations, this approach allows a more compact size, a simple mathematical modeling of the current distribution due to skin effect (therefore less complex mathematical solution of the optimization problem) and a cost-effective manufacturing process. Experimental results obtained from a shunt prototype are reported, which confirm the validity of the proposed approach.