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I’m currently trying to simulate a Rogowski coil implemented on a PCB, before moving to hardware design. The goal is to understand its electrical behavior — induced voltage, bandwidth, and the effect of parasitics — using SPICE (e.g. LTspice).

The physical setup I plan to test later is a split Rogowski coil, made from two semicircular PCB halves that close around a conductor. For now, I only want to simulate it electrically as an equivalent circuit.

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  • \$\begingroup\$ The classic Rogowski coil shape is a helix 'rod' bent into a toroid. The helix isn't a shape one can form with printed wiring on a board... \$\endgroup\$ Commented Nov 14 at 7:09

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It's just like any other transformer. The difficulty is the 'air core' and adjacent metal bits, because there's eddy currents in addition to the intended (primary and secondary) ones.

Transformer cores simplify the magnetic coupling of the windings (it's nearly "1.0"). All adjacent metal acts like extra 'secondary' windings, having currents induced, when you haven't a core and magnetically couple to everything nearby...

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