YASA Axial Flux Electric Motor Makes 1000+ HP - But Weighs Just 28 Pounds! - CleanTechnica

The article highlights the groundbreaking development of a YASA axial flux electric motor, which delivers over 1,000 horsepower while weighing just 28 pounds. Unlike conventional radial flux motors, axial flux motors feature a design where the magnetic flux aligns parallel to the axis of rotation, allowing for a larger rotor diameter and thus significantly higher torque output—up to four times greater than typical radial motors. This design also reduces the stator iron mass by up to 80%, enhancing power density and improving vehicle range by 5 to 10%. The motor’s efficiency and compactness stem from innovations such as removing the stator yoke and using a Yokeless And Segmented Armature (YASA), which facilitates mass manufacturing and reduces weight without sacrificing performance. Developed initially by Tim Woolmer during his Ph.D. at Oxford University and later acquired by Mercedes-Benz, the YASA motor represents a mature, fully functional prototype rather than a theoretical concept. It achieves exceptional performance through precision engineering and advanced thermal management,