— Technology

Bidirectional
software-defined.

— How it works

Wall to vehicle. No contact.

AC from the grid is rectified and power-factor corrected in the wall assembly, then switched through a GaN/SiC H-bridge into a resonant tank and magnetic coupler in the ground assembly. Energy couples through the air gap to the vehicle secondary — with active FOD/LOD before transfer.

AC grid230/400 V

Wall assemblyAC–DC · PFC >0.99 · HMI & grid interface

Ground assemblyGaN/SiC H-bridge · resonant tank · coupler · FOD/LOD

VehicleSecondary · battery · V2G ready

V2G · bidirectional — same hardware pushes and pulls.

WPT · SECTION VIEWFIG · 01

— The pad

Sand, snow,
a thin layer of asphalt.

The SIGMA primary lives in the ground; the secondary lives in your vehicle's floor pan. They never touch. A resonant tank tuned to 85 kHz couples them through an air gap of ≥15 cm.

85 kHz SAE J2954Industry standard for light-duty wireless power transfer.
Adaptive impedanceController re-tunes thousands of times per second to track misalignment.
OTA firmwareSame controller, new features — quarterly updates.

85 kHz

SAE J2954

≥15 cm

Air gap

1000/s

Impedance retune

15118-20

Plug & Charge

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Wall to vehicle. No contact.

Sand, snow,a thin layer of asphalt.

Sand, snow,
a thin layer of asphalt.