While batteries get most of the headlines, the electric motor is the heart that converts energy into motion. For the past decade, most EVs have relied on radial flux motors, where the magnetic flux flows outward from a central rotor. However, a superior design—the axial flux motor—is finally moving from niche racing applications to mainstream production. In an axial flux motor, the magnetic flux runs parallel to the axis of rotation, allowing for a flat, pancake-like shape. This design offers a staggering improvement in power density: axial flux motors produce up to four times the torque of a radial flux motor of the same weight.
This compactness unlocks radical new vehicle architectures. Because the motor is so thin and light, it can be integrated directly into the wheel hub or mounted directly alongside the gearbox without a bulky central unit. For automakers, this means more interior space for passengers and cargo, lower unsprung mass (when carefully managed), and the ability to place individual motors on each wheel. That last feature enables true torque vectoring—delivering precise positive torque to the right wheels and negative torque to the left—allowing vehicles to rotate and corner with physics-defying agility, eliminating understeer entirely.
Manufacturing these motors at scale has been the historic barrier. Axial flux motors are notoriously difficult to build because maintaining a precise, uniform air gap between the spinning rotors and stator is challenging, and traditional winding techniques are slow. However, companies like YASA (owned by Mercedes-Benz) and Koenigsegg have pioneered new manufacturing processes, including printed circuit board stators and segmented assembly. The result is a motor that is not only more powerful but often more efficient than radial designs, especially at partial loads. As EV platforms move toward performance and efficiency optimization rather than simply proving viability, the axial flux motor is poised to become the standard for premium EVs, offering sports car performance from a motor the size of a large pizza.