Link modules

5 kW to 1 MW family at a 1.0 m air gap.

Three configurations, shared architecture. Every figure in the table is simulated.

Link family — Fig. M-01Three-coil relay: Tx, passive relay, Rx. The relay raises effective k and lowers tank voltage; total circulating reactive power is relocated, not removed.

From one module to a 1 MW site

The 5 kW research link is the physics article. The next step is a 25 kW module with a kV-class tank and partial-discharge qualification (G2).

100 kW is 4 × 25 kW with current sharing (simulated: k = 0.156 / 0.062, η = 98.42 %). 1 MW is 2 × 500 kW at 10 kHz, 3.50 m pancake, k = 0.256, η = 98.84 % (simulated), about 240 kg of copper and a 1.12 MVA MV connection.

	Research link	100 kW system	1 MW system
Status	specified	studied	studied
Architecture	three-coil relay	4 × 25 kWsim.	2 × 500 kWsim.
Gap	1.0 msim.	1.0 msim.	1.0 msim.
Frequency	85 kHzsim.	85 kHzsim.	10 kHzsim.
Coil	1.10 m dia, axial stacksim.	1.70 m diasim.	3.50 m dia pancakesim.
Coupling	0.117 relay / 0.037 directsim.	0.156 / 0.062sim.	0.256sim.
Coil-to-coil η	97.18 %sim.	98.42 %sim.	98.84 %sim.
Controlled-zone radius	—	3.3 msim.	6.3 msim.

The 1 MW configuration needs roughly 240 kg of copper conductor and a 1.12 MVA medium-voltage connection — concrete numbers an industrial reader can sanity-check.

FEM setup for the 5 kW / 1.00 m link (simulated). Degrees of freedom and run times are from the last accepted adaptive pass.
Solver	Physics	f	Unknown	Mesh	Acceptance
Ansys Maxwell 3D	Eddy Current	85 kHz	A	tetra + prism	M, k, R_ac, P_eddy
COMSOL AC/DC	Magnetic Fields	85 kHz	A_φ (2D-axi)	mapped + refine	J_Litz, \|B\|, ferrite
COMSOL 3D	Magnetic Fields	85 kHz	A	adaptive tetra	k(Δx), F_Lorentz

COMSOL |B| — Fig. FEM-01COMSOL AC/DC — |B| on an axisymmetric cut. Post-processing style illustration; figures simulated.

COMSOL mesh — Fig. FEM-02FEM mesh (COMSOL): refinement in copper and in the 1.00 m air gap.

COMSOL J Litz — Fig. FEM-03Current density J in Litz at 85 kHz (COMSOL) — skin and proximity.

COMSOL A_phi — Fig. FEM-04COMSOL — vector potential A_φ on an axisymmetric cut, 85 kHz. Simulated.

COMSOL misalignment — Fig. FEM-05COMSOL — |B| under lateral misalignment (~150 mm). Parametric study, simulated.

COMSOL ferrite |B| — Fig. FEM-06COMSOL — |B| in ferrite backing (saturation). Simulated.

Ansys eddy loss — Fig. FEM-07Ansys Maxwell 3D — eddy-current loss density in copper/ferrite. Simulated.

Ansys streamlines — Fig. FEM-08Field lines of the three-coil relay (Maxwell 3D). Simulated.

Ansys ICNIRP — Fig. FEM-09ICNIRP contours in plan (Maxwell). Radii 3.3 m and 6.3 m: simulated.

Ansys 3D mesh — Fig. FEM-10Ansys Maxwell 3D — adaptive tetrahedral mesh on coils and air gap.

Ansys |B| slice — Fig. FEM-11Ansys Maxwell 3D — |B| slice through the 1.00 m gap. Simulated.

Ansys force density — Fig. FEM-12Ansys Maxwell 3D — Lorentz force density. Simulated.

Link modules

NWPT modules

From one module to a 1 MW site