Linear Arc Motors are Linear Induction Machines (LIMs) that have a flat surface and a curved stator assembly for powering an arc-shaped reaction rail or wheel. Originally invented for use on naval ship electric steering gear apparatus. The Arc Motor combines a robust, copper-wound stator with a solid reaction wheel composed of stainless steel, bronze, monel or titanium. A wide range of torques are available up to 150 kN-m for marine, industrial and commercial use.
The Arc Motor is especially useful for driving a wheel where limited mounting area is available. The stator assemblies are encapsulated in stainless steel and are water and oil-proof. The electromagnetic field speed ranges from 5 m/s to 85 m/s and is controlled by a variable frequency IGBT inverter, custom design by PSA for LIM Arc Motor duty.
 
LIM Arc Motor Built for Maglev Train Propulsion Simulator
This LIM Arc Motor is especially noteworthy as it attained several landmark performance levels by virtue of its unique design, with a stator winding distribution factor= 1.0, a 3,6 or 9 phase stator winding and a high density stator configuration allowing encapsulation. Special units are also submersible in salt water. The design allows double and triple redundancy by virtue of the modular and easily accessible motor magnetics unit.