Pick an input — h, I, amax, f, Nr, Nt — set a range, and the solver returns a JSON array of pre-computed field snapshots. The bar-chart UI animates k against the swept axis as frames roll in.
In AirInduct Sim you can sweep one input at a time — air gap, lateral offset, coil size, turn count, current or frequency — and see how the outputs change across the range. Each step is a full closed-form Biot–Savart and Neumann solve, not an interpolation, so a curve of mutual inductance M, coupling k or induced voltage against the swept input is as exact as a single run. The two sweeps engineers use most are the gap sweep, which shows how k falls as the coils move apart, and the lateral misalignment sweep, which shows how far the receiver can slide before coupling drops past a set level. Frequency changes the induced voltage but not M, L or k, because the solver is magnetostatic. When a sweep shows the design is close, the optimizer can search for a geometry that hits a target. The AI Copilot and the MCP server expose the same gap and misalignment sweeps.
Every tunable that the calculator exposes is sweepable: spacing h (most common), excitation current I, coil size amax, turn counts Nr and Nt, frequency f, and the offset triplet (xt, yt, zt).
The 6.78 MHz ISM band and the 85 kHz SAE J2954 EV-charging band ship as one-click presets, and custom frequencies are accepted. The solver is magnetostatic, so frequency scales the induced voltage while M, L and k stay fixed; keep the coil well below its self-resonance.
A sweep returns its frames as a JSON array — field snapshots, time-series and aggregated metrics together. The web UI renders a scrubber and animated bar chart; AI agents can run gap and misalignment sweeps through the MCP server.
Thirteen inputs, including transmitter current I, mutual current Iᶜ, frequency f, axial gap h, coil size, turn counts Nᵣ and Nₜ and the lateral offsets. Sweep any one across 2 to 100 steps. Coils stay coaxial with parallel planes; angular tilt is not modelled.
Adaptive mode auto-densifies the sample grid to ~300 points concentrated where the response curve changes fastest, producing smooth k-vs-parameter and efficiency curves without manual stepping.
For air-core coil pairs, yes. AirInduct Sim sweeps k, M and induced voltage against any one input in seconds, with no mesh refinement loop, and it is free to start. Designs that depend on ferrite, shielding or eddy currents still need an FEM parametric study.
